阅读说明：本技术 一种可进行温度控制的喷射装置及后处理系统 (Injection apparatus capable of controlling temperature and post-processing system ) 是由 殷国旺 李建坤 王淼 蔡彦彬 张春 王雪 徐贞宇 张鲲 于 2021-03-12 设计创作，主要内容包括：本发明涉及一种可进行温度控制的喷射装置及后处理系统,包括通过管路依次连通形成循环回路的输水泵、三通阀一、喷射单元、蓄水壶和三通阀二,三通阀一余下的接口用于进水,三通阀二余下的接口用于出水或回水。本发明的有益效果是结构简单,设计合理,既能够改善发动机运行初期喷射单元温度过高的问题,提高喷射单元的温度控制稳定性,又解决了发动机熄火水泵停转后喷射单元温度不可控的问题,延长喷射单元的使用寿命,节约成本。(The invention relates to a spraying device capable of controlling temperature and a post-treatment system, which comprise a water delivery pump, a three-way valve I, a spraying unit, a water storage kettle and a three-way valve II which are sequentially communicated through a pipeline to form a circulation loop, wherein the rest of interfaces of the three-way valve I are used for water inlet, and the rest of interfaces of the three-way valve II are used for water outlet or water return. The invention has the advantages of simple structure and reasonable design, can improve the problem of overhigh temperature of the injection unit at the initial running stage of the engine, improves the temperature control stability of the injection unit, solves the problem of uncontrollable temperature of the injection unit after the engine is stalled and the water pump stops running, prolongs the service life of the injection unit and saves the cost.)

1. A temperature-controllable spraying device, characterized in that: the device comprises a water delivery pump (9), a first three-way valve (10), an injection unit (2), a water storage kettle (1) and a second three-way valve (11) which are sequentially communicated through pipelines to form a circulation loop, wherein the rest of the first three-way valve (10) is used for water inlet, and the rest of the second three-way valve (11) is used for water outlet or water return.

2. The temperature-controllable spraying device according to claim 1, characterized in that: the water pump is characterized by further comprising a control unit (12), and the water delivery pump (9) is in communication connection with the control unit (12).

3. The temperature-controllable spraying device according to claim 2, characterized in that: the water storage kettle is characterized by further comprising a temperature sensor (13), wherein the temperature sensor (13) is fixedly arranged on the water storage kettle (1) or the spraying unit (2) and is in communication connection with the control unit (12).

4. The temperature-controllable spraying device according to claim 2, characterized in that: the first three-way valve (10) and/or the second three-way valve (11) are electromagnetic valves, and the first three-way valve (10) and/or the second three-way valve (11) are in communication connection with the control unit (12).

5. The temperature-controllable spraying device according to any one of claims 1 to 4, characterized in that: the water inlet and the water outlet of the water storage kettle (1) are respectively positioned at the bottom and the top of the water storage kettle.

6. The temperature-controllable spraying device according to any one of claims 1 to 4, characterized in that: the water storage kettle (1) is of a cuboid structure and is positioned above the spraying unit (2).

7. An aftertreatment system, comprising: comprising a spraying device according to any one of claims 1 to 6.

8. The aftertreatment system of claim 7, wherein: still include engine water pump (6), inlet tube (3) and wet return (5), the water inlet of injection unit (2) with the one end intercommunication of inlet tube (3), the delivery port of engine water pump (6) with the other end intercommunication of inlet tube (3), the delivery port of retaining kettle (1) with the one end intercommunication of wet return (5), the water inlet of engine water pump (6) with the other end intercommunication of wet return (5).

9. The aftertreatment system of claim 7, wherein: the water storage kettle is characterized by further comprising a post-treatment device (7), and the water storage kettle (1) is fixedly arranged on the post-treatment device (7).

10. The aftertreatment system of claim 9, wherein: and heat insulation cotton (8) is fixedly arranged between the post-treatment device (7) and the water storage kettle (1).

Technical Field

The invention relates to the technical field of post-processing, in particular to an injection device capable of controlling temperature and a post-processing system.

Background

According to the latest national emission legislation requirements, road vehicles: 2020.07.01 has served as the discharge standard for the national sixth a stage, 2023.07.01 has served as the discharge standard for the national sixth B stage (part of the territory 2019.01.01 has served as the discharge standard for the national sixth); non-road moving machine: 2020.12.28 discloses information according to the fourth stage of non-road, 2022.12.01 below 560KW (including 560KW) comprehensively implements the four stages of non-road. In order to meet the requirements of emission regulations, SCR (integrated SCR-based technologies including HSCR, SDPF, and the like) and other technologies for injecting a catalyst or a reactant into the exhaust gas of an engine are widely applied to the field of aftertreatment, and all of the technologies need to adopt an electronically controlled injection unit to control the injection time and the injection amount (hereinafter referred to as an injection unit). High temperature exhaust has the heating effect to spraying the unit on the one hand, and on the other hand sprays the unit and self generates heat in the course of the work, if not control, finally leads to spraying the unit high temperature, causes inside original paper to damage, consequently urgently needs a set of aftertreatment temperature management system to solve this problem.

The technical route adopted at present is to add a cooling water channel in the injection unit, and to take away heat by using circulating cooling water when an engine works, so as to realize cooling of the injection unit. The current scheme can solve the injection unit high temperature problem when the engine is working, but does not solve the injection unit temperature rise after the engine stalls. When the engine is flamed out after heavy-load operation, particularly after aftertreatment regeneration, the temperature of the injection unit can be greatly increased due to thermal soaking, so that a temperature management system is urgently needed to solve the problem.

Disclosure of Invention

The present invention is directed to an injection device and an aftertreatment system capable of controlling temperature, and aims to solve the above problems.

The technical scheme for solving the technical problems is as follows:

the utility model provides a can carry out temperature control's injection apparatus, includes through pipeline intercommunication formation circulation loop's water delivery pump, three-way valve one, injection unit, retaining kettle and three-way valve two in proper order, the remaining interface of three-way valve one is used for intaking, the remaining interface of three-way valve two is used for going out water or return water.

The invention has the beneficial effects that: when the spraying device works, external cooling water enters the spraying unit and then enters the water storage kettle from the return pipe to take away heat in the spraying unit so as to cool the spraying unit; at the moment, the water delivery pump is closed, and meanwhile, part of cooling water is stored in the water storage kettle; when the water storage kettle does not work, the water delivery pump is started, the water delivery pump realizes the circulating flow of the cooling water in the water storage kettle between the water storage kettle and the injection unit, and the cooling quality of the injection unit is ensured. The invention can improve the problem of overhigh temperature of the spraying unit, improve the stability of temperature control of the spraying unit and save the cost.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the water pump further comprises a control unit, and the water pump is in communication connection with the control unit.

The beneficial effects of adopting above-mentioned further scheme are that through the opening and close of control unit control water delivery pump, realize automatic control, make things convenient for the cooling to spray the unit, degree of automation is high, labour saving and time saving.

Further, still include temperature sensor, temperature sensor fixed mounting on water storage kettle or spraying unit, it with the control unit communication is connected.

The adoption of the further scheme has the advantages that the temperature of the injection unit is monitored in real time through the temperature sensor, when the temperature of the injection unit is lower than a set threshold value, the control unit controls the switching of the first three-way valve and the second three-way valve, the water delivery pump is closed, the cooling of the injection unit is realized by utilizing the circulating water of the engine of the whole machine, the cooling is convenient, and the cost is saved; when the temperature of the injection unit is higher than a set threshold value, the control unit controls the switching of the first three-way valve and the second three-way valve, the water delivery pump is started, the circulating water of the engine of the whole machine stops at the moment, the water delivery pump utilizes the water in the water storage kettle to cool the injection unit, the temperature of the injection unit is reduced in time, the working performance and the service life of the injection unit are guaranteed, and the cost is saved.

Furthermore, the first three-way valve and/or the second three-way valve are electromagnetic valves, and the first three-way valve and/or the second three-way valve are in communication connection with the control unit.

The beneficial effect of adopting above-mentioned further scheme is that through the switching of control unit realization three-way valve one and two interfaces of three-way valve, realize the switching of different pipelines to realize the cooling treatment of injection unit when engine work and flame-out, guarantee the working property and the life of injection unit.

Further, the water inlet and the water outlet of the water storage kettle are respectively positioned at the bottom and the top of the water storage kettle.

The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design, cooling water gets into the water storage kettle from the bottom of water storage kettle, then discharges from the top of water storage kettle, can effectively discharge the air in the water storage kettle to in cooling water gets into the water storage kettle fast, guarantee the water demand in the water storage kettle.

Further, the water storage kettle is of a cuboid structure and is positioned above the spraying unit.

The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design makes things convenient for the dismouting, and stops to supply water the back, and the cooling water in the water storage kettle can rely on the gravity of self to flow to spraying the unit to spray the unit and cool off, effectively reduce the temperature that sprays the unit, prolong its life.

The invention provides an aftertreatment system comprising a spray device as described above.

The invention has the advantages of simple structure and reasonable design, can improve the problem of overhigh temperature of the injection unit at the initial running stage of the engine, improves the temperature control stability of the injection unit, prolongs the service life of the injection unit and saves the cost.

Further, still include engine water pump, inlet tube and wet return, the water inlet of injection unit with the one end intercommunication of inlet tube, engine water pump's delivery port with the other end intercommunication of inlet tube, the delivery port of retaining kettle with the one end intercommunication of wet return, engine water pump's water inlet with the other end intercommunication of wet return.

The engine injection unit temperature control device has the advantages that the structure is simple, the design is reasonable, the problem that the temperature of the injection unit is too high in the initial operation stage of the engine can be solved, the temperature control stability of the injection unit is improved, the problem that the temperature of the injection unit is uncontrollable after the engine is shut down and the water pump stops running is solved, the service life of the injection unit is prolonged, and the cost is saved.

Further, the water storage kettle comprises a post-processing device, and the water storage kettle is fixedly arranged on the post-processing device.

The beneficial effects of adopting the above-mentioned further scheme are that simple structure, rationally distributed, save the space of complete machine.

Further, heat insulation cotton is fixedly arranged between the post-treatment device and the water storage kettle.

The beneficial effects of adopting above-mentioned further scheme are that can effectively block the heat transfer between aftertreatment device and the retaining kettle through thermal-insulated cotton, avoid the high temperature of retaining kettle and can't reach refrigerated effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a first three-way valve according to the present invention;

fig. 3 is a schematic structural diagram of a second three-way valve in the invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the device comprises a water storage kettle, 2, an injection unit, 3, a water inlet pipe, 4, a return pipe, 5, a water return pipe, 6, an engine water pump, 7, a post-processing device, 8, heat insulation cotton, 9, a water delivery pump, 10, a first three-way valve, 11, a second three-way valve, 12, a control unit, 13 and a temperature sensor.

Detailed Description

The principles and features of this invention are described in connection with the drawings and the detailed description of the invention, which are set forth below as examples to illustrate the invention and not to limit the scope of the invention.

As shown in fig. 1 to 3, the present invention provides a spraying device capable of controlling temperature, which comprises a water delivery pump 9, a three-way valve 10, a spraying unit 2, a water storage pot 1 and a two-way valve 11, which are sequentially communicated with each other through a pipeline to form a circulation loop, wherein the rest of the three-way valve 10 is used for water inlet, the rest of the three-way valve 11 is used for water outlet or water return, and the water delivery pump 9 can deliver water in a reservoir 1 to the spraying unit; the water inlet of the water storage pot 1 is communicated with the water outlet of the injection unit 2 through a return pipe 4.

When the cooling device works, external cooling water enters the injection unit 2 and then enters the water storage kettle 1 from the return pipe 4 to take away heat in the injection unit 2 so as to cool the injection unit 2; at the moment, the water delivery pump 9 is closed, and meanwhile, part of cooling water is stored in the water storage kettle 1; but when not working, the water delivery pump 9 is started, the water delivery pump 9 realizes the circulating flow of the cooling water in the water storage kettle 1 between the water storage kettle 1 and the injection unit 2, and the cooling quality of the injection unit 2 is ensured. The invention can improve the problem of overhigh temperature of the injection unit 2, improve the stability of temperature control of the injection unit 2 and save cost.

Example 1

On the basis of the structure, the present embodiment further includes a control unit 12, and the water delivery pump 9 is in communication connection with the control unit 12. During operation, the control unit 12 controls the water delivery pump 9 to be opened and closed, automatic control is achieved, the cooling and spraying unit 2 is convenient to cool, the automation degree is high, and time and labor are saved.

The installation position of the control unit 12 can be selected according to the requirement, and is not limited herein.

The drainage pump 9 may be connected to the control unit 12 through a wire, or may be connected wirelessly, specifically, selected according to actual requirements.

Example 2

On the basis of the first embodiment, the present embodiment further includes a temperature sensor 13, the temperature sensor 13 is fixedly mounted on the water storage pot 1 or the injection unit 2 through a bolt, and is in communication connection with the control unit 12, and is used for detecting the temperature of the water storage pot 1 or the injection unit 2 and sending a corresponding temperature signal to the control unit 12. When the temperature control device is used, the temperature of the injection unit 2 is monitored in real time through the temperature sensor 13, when the temperature of the injection unit 2 is lower than a set threshold value (80-200 ℃), the control unit 12 controls the switching of the interfaces of the first three-way valve 10 and the second three-way valve 11, meanwhile, the water delivery pump 9 is closed, the injection unit 2 is cooled by circulating water of an engine of the whole machine, cooling is convenient, and cost is saved; when the temperature of the injection unit 2 is higher than the set threshold value, the control unit 12 controls the switching of the interfaces of the first three-way valve 10 and the second three-way valve 11, the water delivery pump 9 is started, the circulating water of the whole engine stops at the moment, the water delivery pump 0 utilizes the water in the water storage kettle 1 to realize the cooling of the injection unit 2, the temperature of the injection unit 2 is reduced in time, the working performance and the service life of the injection unit 2 are guaranteed, and the cost is saved.

It should be noted that, since the spraying unit 2 is communicated with the water storage pot 1, the temperature measured when the temperature sensor 13 is installed on the water storage pot 1 is the temperature of the spraying unit 2.

In addition, the temperature sensor 13 may be connected to the control unit 12 through a wire, or may be connected wirelessly, and is specifically selected according to actual requirements.

Example 3

On the basis of the first embodiment, in this embodiment, the first three-way valve 10 and/or the second three-way valve 11 are solenoid valves, and the first three-way valve 10 and/or the second three-way valve 11 are in communication connection with the control unit 12. When the device is used, the first three-way valve 10 and the second three-way valve 11 are switched through the control unit, and switching of different pipelines is realized, so that cooling treatment of the injection unit 2 during engine operation and flameout is realized, the working performance and the service life of the injection unit 2 are ensured, and the cost is saved.

It should be noted that, the valves may be connected to the control unit 12 through a line, or may be connected wirelessly, and specifically, the valves are selected according to actual requirements.

The three ports of the first three-way valve 10 are respectively a port I101, a port II 102 and a port III 103, the port I101 and the port II 102 are respectively communicated with the water return pipe 5, and the port III 103 is communicated with a water inlet of the water delivery pump 9;

the three ports of the second three-way valve 11 are a first port 111, a second port 112 and a third port 113 respectively, the first port 111 and the second port 112 are communicated with the water inlet pipe 3 respectively, and the third port 113 is communicated with the water outlet of the water delivery pump 9.

Besides the above embodiments, the first three-way valve 10 and/or the second three-way valve 11 may also be manual valves, and the specific operation is performed manually, which is more complicated and less precise compared with the third embodiment, and needs to be observed manually, that is, the operation is performed manually according to the temperature data displayed by the control center, which is time-consuming and labor-consuming.

Example 4

On the basis of the above structure, in this embodiment, the water inlet and the water outlet of the water storage kettle 1 are respectively located at the bottom and the top thereof. This simple structure, reasonable in design, cooling water gets into water storage kettle 1 from the bottom of water storage kettle 1, then discharges from the top of water storage kettle 1, can effectively discharge the air in the water storage kettle 1 to in cooling water gets into water storage kettle 1 fast, guarantee the water demand in the water storage kettle 1.

Example 5

On the basis of above-mentioned structure, in this embodiment, water storage kettle 1 is rectangular bodily form structure, and it is located the top that sprays unit 2, simple structure, reasonable in design makes things convenient for the dismouting, and stops supplying water the back, and the cooling water in the water storage kettle 1 can rely on the gravity of self to flow to spraying unit 2 to spray unit 2 and cool off, effectively reduce the temperature that sprays unit 2, prolong its life.

Example 6

On the basis of the above structure, the present embodiment also relates to an aftertreatment system including the injection device as described above. The invention has simple structure and reasonable design, can improve the problem of overhigh temperature of the injection unit 2 at the initial running stage of the engine, improve the temperature control stability of the injection unit 2, prolong the service life of the injection unit 2 and save the cost.

Example 7

On the basis of the sixth embodiment, this embodiment still includes engine water pump 6, inlet tube 3 and wet return 5, and the water inlet of injection unit 2 communicates with the one end of inlet tube 3, and engine water pump 6's delivery port and the other end intercommunication of inlet tube 3, and the delivery port of retaining kettle 1 communicates with the one end of wet return 5, and engine water pump 6's water inlet and the other end intercommunication of wet return 5. The invention has simple structure and reasonable design, can improve the problem of overhigh temperature of the injection unit 2 at the initial running stage of the engine, improve the temperature control stability of the injection unit 2, solve the problem of uncontrollable temperature of the injection unit 2 after the engine is stalled and the water pump stops running, prolong the service life of the injection unit and save the cost.

When the cooling water spraying device is used, cooling water is sequentially sent to the water inlet pipe 3, the spraying unit 2, the return pipe 4, the water storage kettle 1 and the water return pipe 5 in a mode that can be thought by a person skilled in the art, heat in the spraying unit 2 is taken away by the cooling water, the cooling treatment of the spraying unit 2 is realized, and the service life of the spraying unit 2 is prolonged.

Utilize the water in the engine water pump to realize the cooling treatment of injection unit 2 among the above-mentioned scheme, need not additionally to set up cooling arrangement and cooling water, save space, the cooling is convenient.

In addition, after the engine is shut down and the water pump stops working, water stored in the water storage pot 1 flows downwards to the injection unit 2 by means of the gravity of the water storage pot to realize cooling treatment on the injection unit 2, so that the temperature of the injection unit 2 is ensured not to be too high all the time, and the service life of the injection unit is prolonged.

Example 8

On the basis of the sixth embodiment, the embodiment further comprises an after-treatment device 7, the water storage kettle 1 is fixedly installed on the after-treatment device 7 through bolts, the structure is simple, the layout is reasonable, and the space of the whole machine is saved.

Besides the above embodiments, the water storage pot 1 can be mounted on other parts of the whole machine, but occupies a larger space.

The injection unit 2, the engine water pump 6 and the aftertreatment device 7 are in the prior art, and the detailed structure and principle thereof are not described herein again.

Example 9

On the basis of the eighth embodiment, in the present embodiment, the heat insulation cotton 8 is fixedly installed between the post-treatment device 7 and the water storage pot 1, and the heat insulation cotton 8 is only required to be sandwiched between the post-treatment device 7 and the water storage pot 1. This scheme can effectively block the heat transfer between aftertreatment device 7 and the retaining kettle 1 through thermal-insulated cotton 8, avoids the high temperature of retaining kettle 1 and can't reach refrigerated effect.

The working principle of the invention is as follows:

when the engine runs, the control unit 12 outputs a command, the first interface 101 of the first three-way valve 10 is communicated with the second interface 102, the third interface 103 is closed, the first interface 111 of the second three-way valve 11 is communicated with the second interface 112, the third interface 113 is closed, and meanwhile, the water delivery pump 9 is closed and does not work in the system; in the invention, the cooling water is pressurized by the engine water pump 9 and then sequentially pumped into the water inlet pipe 3 and the injection unit 2, the cooling water sequentially flows through the internal circulation pipeline of the injection unit 2, the return pipe 4, the water storage kettle 3, the water storage kettle 1 and the return pipe 4 to take away heat, and the cooling water dissipates the heat through the whole vehicle heat dissipation system.

Because this scheme has adopted retaining kettle 1, compare with prior art scheme, as following beneficial effect: when the engine is flamed out and restarted, the water pump needs to pump the cooling water to water consumption points everywhere after the cooling water is pressurized, the cooling system of the whole vehicle needs to slowly degas (the air of the cooling system is discharged through multiple cycles), and the cooling water can smoothly circulate after the degassing is finished; this scheme is owing to have the existence of retaining kettle 1, and before the engine starts, has certain deposit water (the remaining coolant liquid of engine operation process last time) in retaining kettle 1, can guarantee to spray 2 inside water routes of unit and be full of the cooling water all the time, and prior art scheme is before the whole car accomplishes the exhaust, sprays 2 inside coolant liquid routes of unit and has the risk of lack of water.

When the engine is flamed out, the prior art scheme depends on the circulation of the engine water pump to play a cooling role, the engine water pump 9 stops rotating after flamed out, and the prior art scheme loses the temperature control function on the injection unit 2. According to the scheme, after the engine is shut down, the whole vehicle is analyzed, signals are sent to the control unit 12 after preset logics are met, the control unit 12 sends instructions to the first three-way valve 10 and the second three-way valve 11 after the signals are obtained, and the first interface 101 of the first three-way valve 10 is connected with the second interface 101 of the second three-way valve 10

And the second port 102 is closed, the first port 111 and the third port 113 of the second three-way valve 11 are communicated, the second port 112 is closed, and meanwhile, the water delivery pump 9 is started to act in the system and establish: the second three-way valve 11 (the first interface 111 is communicated with the third interface 113) → the water delivery pump 9 (the water inlet of the water delivery pump 9 → the water outlet) → the first three-way valve 10 (the first interface 101 is communicated with the third interface 103) → the injection unit 2 → the return pipe 4 → the water storage pot 1 → the second three-way valve 11 (hereinafter referred to as independent circulation). The control unit 12 sends a signal to the water delivery pump 9 according to a preset strategy to realize the continuous or discontinuous operation of the water delivery pump 9, and after the water delivery pump 9 operates, cooling water circularly flows in an independent circulation to take away the heat of the injection unit 2.

The invention discloses two control strategies of the control unit 12, and all the control strategies which accord with the disclosed strategy of the invention or have similar core ideas are the protection scope of the invention.

Strategy one: time control

After the engine is shut down, the control unit 12 obtains a command and records the time as t1, the water delivery pump 9 starts to work when power is supplied (electricity or other power sources, herein, an electric signal is taken as an example), the water delivery pump 9 can work when power is supplied continuously or intermittently, the control unit 12 is internally provided with a time t3 which is t1+ t2, when t3 arrives, the water delivery pump 9 stops working when power is lost, wherein t2 is the working time (including the intermittent working interval time) of the water delivery pump 9, and the control unit is obtained through experiments according to different strategies of continuous working and intermittent working. And t3, the control unit 12 sends a command to the first three-way valve 10 and the second three-way valve 11, the first interface 111 of the second three-way valve 11 is communicated with the second interface 112, the third interface 113 is closed, the first interface 101 of the first three-way valve 10 is communicated with the second interface 102, the third interface 103 is closed, independent circulation is failed, and the channel trend is restored to the initial state.

And (2) strategy two: temperature control

The temperature sensor 13 sends a temperature signal Ti to the control unit 12 in real time, and the control unit 12 presets two threshold temperatures T1 and T2 in advance, wherein T1 is a risk temperature of the operation of the injection unit 2, and T2 is a safety temperature of the operation of the injection unit 2. When Ti is more than or equal to T1, the water delivery pump 9 starts to work when being powered on, and the water delivery pump 9 can work when being powered on continuously or intermittently; when Ti is less than or equal to T2, the power transmission pump 9 loses power and stops working, the control unit 12 records the power loss time T1 and starts timing, when the timing time exceeds T2 (the water pump stop working time exceeds T2), the control unit 12 sends a command to the first three-way valve 10 and the second three-way valve 11, the first interface 111 and the second interface 112 of the second three-way valve 11 are communicated, the third interface 113 is closed, the first interface 101 and the second interface 102 of the first three-way valve 10 are communicated, the third interface 103 is closed, independent circulation is disabled, and the channel trend is restored to the initial state. the time T2 is related to the risk temperature T1 of the operation of the injection unit 2, the safety temperature T2 of the operation of the injection unit 2 and the continuous/intermittent operation mode of the water pump 9 and needs to be determined by experiments.

The control unit 12 enters the logic: stopping the engine; the control unit 12 exits the logic: and the first case, the strategy cycle is completed, the second case and the engine is started to run, and if the first case conflicts with the second case, the second step takes precedence.

It should be noted that, the electronic components according to the present invention are all of the prior art, and the above components are electrically connected to a controller (model TC-SCR) of the whole device, and a control circuit between the controller and each component is the prior art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.