CN118024818A - Liquid heater and automobile heating system and method for realizing double-system heating - Google Patents

Abstract

The invention discloses a liquid heater and an automobile heating system and method for realizing double-system heating, wherein the liquid heater comprises a shell, a heat exchanger, a temperature control valve, a temperature collector and a controller, wherein the shell is provided with a liquid inlet; the heat exchanger is arranged inside the shell; the temperature control valve is arranged on the heat exchanger and is provided with a plurality of liquid outlets for connecting a plurality of external heating systems; the temperature collector is arranged on a connecting pipeline from the liquid inlet to the heat exchanger; the controller is fixed on the shell and is electrically connected with the temperature collector and the temperature control valve respectively. The invention solves the technical problems that in the prior art, a liquid heater, a warm air device and an engine cannot meet the requirement of heating performance in a specified time in a parallel connection mode and cannot meet the requirement of engine starting time in the specified time in a serial connection mode.

Description

Liquid heater and automobile heating system and method for realizing double-system heating

Technical Field

The invention relates to the technical field of liquid heaters, in particular to a liquid heater, and an automobile heating system and method for realizing double-system heating.

Background

The liquid heater is a fuel oil heater for heating liquid (water or coolant instead of water in low-temperature environment), is generally applied to the low-temperature starting, preheating and heating of diesel engines, warm air heating, glass defrosting and other aspects in the fields of automobiles and engineering machinery, and adopts a fuel oil medium burning heat exchange mode to heat the coolant in a diesel engine cylinder and the coolant of a warm air device so as to achieve the purposes of preheating the engine cylinder and heating the warm air device.

In the prior art, a liquid heater applied to the automotive field is generally connected with a warm air device in parallel or in series on an engine. When the liquid heater and the warm air device are connected in parallel with the engine, a driver or an occupant needs to start the engine first when using the warm air device, the temperature of the cooling liquid in a low-temperature environment (generally from minus 30 ℃ to minus 43 ℃) rises slowly, the engine needs to be preheated for about 20 minutes before starting, the temperature of the engine needs to rise to a certain degree when using the warm air device, the problems of long waiting time and poor comfort exist, and the requirement of heating performance in a specified time cannot be met; when the liquid heater is connected with the warm air device in series on the engine, the cooling liquid heated by the liquid heater flows through the warm air device firstly and then returns to the diesel engine to preheat the cylinder body, the arrangement distance between the warm air device and the diesel engine is far in the mode, the flow resistance of the whole circulation system is large, the flow rate of the cooling liquid is low, the heat dissipation loss of the cooling liquid after long-distance conveying is large, the preheating effect of the diesel engine cylinder body is poor, and the starting time specified by the diesel engine in a low-temperature environment cannot be met.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a liquid heater, an automobile heating system and an automobile heating method for realizing double-system heating, so as to solve the technical problems that the liquid heater, a warm air device and an engine in the prior art cannot meet the requirement of heating performance in a specified time in a parallel connection mode and cannot meet the requirement of engine starting time in the specified time in a serial connection mode.

In order to achieve the above technical objective, in a first aspect, the present invention provides a liquid heater, which comprises a housing, a heat exchanger, a temperature control valve, a temperature collector and a controller, wherein the housing has a liquid inlet, the heat exchanger is disposed inside the housing, the temperature control valve is mounted on the heat exchanger, the temperature control valve has a plurality of liquid outlets for connecting a plurality of external heating systems, the temperature collector is disposed on a connecting pipe from the liquid inlet to the heat exchanger, the controller is fixed on the housing, and the controller is electrically connected with the temperature collector and the temperature control valve respectively, and controls the temperature control valve to open different liquid outlets according to the liquid inlet temperature obtained by the temperature collector.

Further, the liquid heater further comprises a circulating pump, the circulating pump is arranged at the liquid inlet, and the temperature collector is arranged on a connecting pipeline from the circulating pump to the heat exchanger.

Further, the liquid heater further comprises an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are respectively connected with the air inlet and the air outlet on the shell.

Further, the temperature control valve comprises a valve body, a mandrel and a driving piece, wherein a liquid inlet and two liquid outlets are respectively formed in two sides of the valve body, a cylindrical cavity is formed in the valve body, the mandrel is arranged in the cavity in a matched mode, and the mandrel is in transmission connection with the driving piece, so that the mandrel can move left and right in the cavity.

Further, a cavity is formed in the mandrel, two liquid inlet channels and two liquid outlet channels which are communicated with the cavity are formed in the mandrel on two sides of the cavity respectively, the two liquid inlet channels are connected with the liquid inlet when the mandrel moves, and the two liquid outlet channels are connected with the two liquid outlet when the mandrel moves.

In a second aspect, the present invention provides an automobile heating system for implementing dual-system heating, including an engine, a warm air device, and the liquid heater according to the first aspect of the present invention, wherein a water inlet end of the engine is connected to one of the liquid outlets of the liquid heater, a water outlet end of the engine is connected to the liquid inlet of the liquid heater, a hot water inlet of the warm air device is connected to the other liquid outlet of the liquid heater, and a cold water outlet of the warm air device is connected to the water inlet end of the engine.

Further, the automobile heating system further comprises an oil tank and an oil extraction pipe, and two ends of the oil extraction pipe are respectively connected with the oil tank and the liquid heater.

Further, the automobile heating system further comprises an electromagnetic oil pump, and the electromagnetic oil pump is arranged on the oil taking pipe.

In a third aspect, the present invention provides an automobile heating method for implementing dual-system heating, where the heating control method is implemented based on the automobile heating system for implementing dual-system heating provided in the second aspect of the present invention, and specifically includes the following steps:

Pre-storing a preset temperature value for switching different liquid outlet openings of the liquid heater;

acquiring a liquid inlet temperature value of a liquid inlet of the liquid heater;

And comparing the liquid inlet temperature value with a preset temperature value, and controlling the opening of the liquid outlet corresponding to the liquid heater according to a comparison result to realize heating of different heating systems.

Further, the control method further includes:

Pre-storing a protection temperature value, and controlling the liquid heater to stop heating work and keeping the circulating pump running when the acquired liquid inlet temperature value of the liquid inlet of the liquid heater is larger than or equal to the protection temperature value.

Compared with the prior art, the invention has the beneficial effects that:

1. The liquid heater comprises a liquid inlet and a plurality of liquid outlets, and a temperature collector is arranged on a connecting pipeline from the liquid inlet to a heat exchanger and used for detecting the liquid inlet temperature of the liquid heater, so that a controller can control different liquid outlet water of a temperature control valve according to different detected liquid inlet temperatures so as to meet the heating requirement of an external heating system connected with different liquid outlets;

2. The invention provides an automobile heating system and a method for realizing double-system heating, which are designed according to the characteristics of engine preheating and warm air device heating in a low-temperature environment, wherein a water inlet end of an engine and a hot water inlet of the warm air device are respectively connected with two liquid outlets of a liquid heater, and the liquid heater is controlled to heat cooling liquid in the engine or the warm air device through different detected liquid inlet temperatures; therefore, the technical scheme of the invention can preferentially ensure that the engine cylinder body is preheated, so that the engine cylinder body can be rapidly preheated in a short time under a low-temperature environment, and the low-temperature starting of the engine is facilitated; after the temperature of the cooling liquid rises, the cooling liquid is automatically switched to heat the warm air device, so that the waiting time of warm air is reduced, the phenomenon that the warm air device blows cold air is avoided, and the function of directly heating the warm air device under the parking working condition can be realized.

Drawings

FIG. 1 is a schematic diagram of a prior art liquid heater connected in parallel with an engine and a warm air device;

FIG. 2 is a schematic diagram of a prior art liquid heater in series with an engine and warm air device;

FIG. 3 is a schematic view of a liquid heater according to the present invention;

FIG. 4 is a schematic structural diagram of a temperature control valve according to the present invention;

FIG. 5 is a schematic diagram II of the structure of the temperature control valve according to the present invention;

FIG. 6 is a system diagram of an automotive heating system according to the present invention;

Fig. 7 is a heating operation schematic diagram of the heating system of the automobile according to the present invention.

The figure shows:

100. The liquid heater, 110, the shell, 120, the heat exchanger, 130, the temperature control valve, 131, the first liquid outlet, 132, the second liquid outlet, 133, the valve body, 1331, the liquid inlet, 1332, the cavity, 134, the mandrel, 1341, the cavity, 1342, the liquid inlet channel 1343, the liquid outlet channel, 135, the driving piece, 140, the temperature collector, 150, the controller, 160, the circulating pump, 170, the air inlet pipe, 180 and the exhaust pipe;

200. an engine;

300. A warm air device;

400. An oil tank;

500. an oil extraction pipe;

600. An electromagnetic oil pump.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

As is well known, for a diesel engine, when the ambient temperature is above-30 ℃, the engine can be started by dragging the starter, and when the ambient temperature is between-30 ℃ and-43 ℃, a liquid heater is needed to heat the cooling liquid in the engine cylinder before the diesel engine is started, and the cooling liquid is heated for 20-30 minutes usually so that the temperature of the cooling liquid is increased from-30 ℃ to-43 ℃ to +10 ℃ to +20 ℃ or more, so that the low-temperature starting requirement of the diesel engine can be met. Therefore, in the automotive field, a liquid heater is generally used to perform low-temperature start-up preheating of an engine, warm air heating, glass defrosting, and the like.

In the prior art, the liquid heater is typically connected in parallel with the warm air device on the engine or in series with the engine. Fig. 1 shows the working principle of the parallel connection of the liquid heater and the engine and the warm air device, as shown in fig. 1, when the engine 200 needs to be started in a low-temperature environment, the liquid heater 100 is started to work firstly, the liquid heater 100 atomizes and combusts fuel, meanwhile, the liquid heater 100 takes water from the cylinder cover or the upper part of the cylinder body of the engine 200 by a circulating pump, the water flows back to a water pump water inlet of the engine 200 after being heated by the liquid heater 100, the cylinder body and the cylinder cover of the engine 200 are heated by hot water, and the engine cylinder body can be started smoothly after being fully preheated; when the engine 200 is started, the water temperature is gradually increased, then the warm air device 300 is opened, hot water in the water jacket of the engine 200 flows to the warm air device 300 under the action of the water pump of the engine 200, and returns to the water pump water inlet of the engine 200 after heating the cab or the engine room. The main disadvantages of this approach are:

1. The driver or passenger wants to use the warm air device 300, and must first start the engine 200. Because the water or the coolant of the warm air device 300 cannot flow by itself when the engine 200 is not operated, it is necessary to wait for the liquid heater 100 to warm for about 20 minutes before the engine 200 is started in a low temperature environment of-30 to-43 ℃, and it is difficult for a driver or a passenger to stay in the vehicle for such a long time in the low temperature environment; sometimes, after the liquid heater 100 heats the engine 200, the engine 200 still cannot be started due to other faults, and at this time, the warm air device 300 cannot be used, so that the driver or the passenger can sit in the vehicle in a low-temperature environment with poor comfort, and even life danger can occur;

2. The driver or passenger wants to use the warm air device 300, and has to wait for the water temperature of the engine 200 to rise to a certain degree, otherwise the warm air device 300 will blow cold air; in a low-temperature environment, the water temperature of the engine 200 rises slowly, and a driver or a passenger is difficult to wait for a long time in the vehicle, so that riding comfort is poor;

3. When the driver or passenger is debugging the loading device in situ, the engine 200 is started to generate great noise to influence the comfort of the passenger, and the engine 200 is operated to consume more fuel, so that the use cost of the user is greatly increased, and therefore, the driver or passenger needs to use the warm air device 300 at this time but wants to not start the engine 200, and the warm air device 300 cannot be used without starting the engine 200.

Moreover, fig. 2 shows the working principle of the liquid heater in series connection with the engine and the warm air device, as shown in fig. 2, when the engine 200 needs to be started in a low-temperature environment of-30 ℃ to-43 ℃, the liquid heater 100 is firstly started to work, the liquid heater 100 atomizes and combusts fuel, meanwhile, the liquid heater 100 takes water from the cylinder cover or the upper part of the cylinder body of the engine 200 by a circulating pump, and after being heated by the liquid heater 100, the water flows to the warm air device 300 to heat a warm air core body, and then returns to a water pump water inlet of the engine 200 to heat the cylinder body and the cylinder cover of the engine 200; the cylinder of the engine 200 can be smoothly started after the liquid heater 100 is heated for a long time. When the engine 200 is started, the liquid heater 100 can continuously operate, the water temperature of the warm air device 300 is rapidly increased, and hot water in the water jacket of the engine 200 flows to the warm air device 300 under the combined action of the water pump of the engine 200 and the circulating pump of the liquid heater 100, so as to heat the cab or the cabin. Again, this approach still has problems:

1. When the liquid heater 100 and the air heater 300 are designed in series, the liquid heater 100 has a poor heating effect on the cylinder of the engine 200 and has a low heating efficiency. When the diesel engine is started in a low-temperature environment, development indexes are required for starting time, and the liquid heater 100 is adopted to heat the water temperature in the cylinder body of the diesel engine, so that the water temperature of the diesel engine needs to be increased as much as possible in a short time to ensure that the engine is started smoothly. If the heater 300 and the liquid heater 100 are designed in series, it is equivalent to that the hot water heated by the liquid heater 100 heats the heater 300 first and then flows to the engine 200 to heat the cylinder of the engine 200, and the arrangement distance between the heater 300 and the engine 200 is long, so that the flow resistance of the whole circulation system is large to reduce the flow of cooling liquid, and the heat dissipation loss of the cooling liquid after being conveyed by the steel pipe in a long distance in a low-temperature environment is large, therefore, the preheating effect on the cylinder of the engine 200 is poor, and the engine 200 is difficult to start in a specified time in the low-temperature environment;

2. when a driver or an occupant debugs the on-site installation equipment in a low-temperature environment, the engine 200 is not started to directly heat the warm air device 300 by using the liquid heater 100, and the water circulation needs to continuously flow through the warm air device 300 and the cylinder body of the engine 200 at the beginning, so that the water temperature of the warm air device 300 rises slowly, the warm air heating effect is poor when the driver or the occupant can not use the warm air device 300 to quickly heat when the vehicle is parked and the engine is not started, and the comfort experience is poor.

Therefore, in view of the defects in the prior art, the invention provides the liquid heater and the automobile heating system and method for realizing double-system heating according to the characteristics of engine preheating and warm air device heating in a low-temperature environment. When the temperature of water or cooling liquid is low (the water temperature is between-43 ℃ and 0 ℃), the engine cylinder body can be preheated preferentially, so that the engine cylinder body can be preheated rapidly in a short time; when the temperature of water or cooling liquid rises to a set temperature (T is more than or equal to 30 ℃), automatically switching to heating to the warm air device; when the temperature of the coolant rises to the protection temperature (t=80℃), heating is stopped until the temperature of the water or the coolant is lower than the set value (t=60℃), and heating is restarted to maintain a high water temperature.

As shown in fig. 3, in a first aspect, the present invention provides a liquid heater 100 comprising a housing 110, a heat exchanger 120, a temperature controlled valve 130, a temperature collector 140, and a controller 150.

The heat exchanger 120 is disposed in the casing 110, the temperature control valve 130 is mounted on the heat exchanger 120, the temperature control valve 130 has two liquid outlets, namely a first liquid outlet 131 and a second liquid outlet 132, respectively, for connecting the engine 200 and the air heating device 300, the temperature collector 140 is disposed on a connection line between the liquid inlet and the heat exchanger 120, the controller 150 is fixed on the casing 110, and the controller 150 is electrically connected with the temperature collector 140 and the temperature control valve 130.

When the liquid heater 100 provided by the invention is used, the liquid inlet temperature of the liquid inlet of the liquid heater 100 can be obtained in real time through the temperature collector 140, and the first liquid outlet 131 and the second liquid outlet 132 are controlled to respectively discharge liquid according to different detected liquid inlet temperatures, so that the requirements of directly heating the engine 200 or directly heating the warm air device 300 can be met, and the requirement of rapid heating is met.

In a preferred embodiment, the liquid heater 100 further includes a circulation pump 160, the circulation pump 160 is disposed at the liquid inlet, and the temperature collector 140 is disposed on a connection line between the circulation pump 160 and the heat exchanger 120.

In a preferred embodiment, the liquid heater 100 further includes an air inlet pipe 170 and an air outlet pipe 180, and the air inlet pipe 170 and the air outlet pipe 180 are respectively connected to an air inlet and an air outlet of the housing 110, for feeding air into the liquid heater 100 and discharging combusted exhaust gas.

In a preferred embodiment, as shown in fig. 4 and 5, the thermo valve 130 includes a valve body 133, a mandrel 134, and a driving member 135, two sides of the valve body 133 are respectively provided with a liquid inlet 1331 and two liquid outlets (a first liquid outlet 131 and a second liquid outlet 132), which are respectively used as a cooling liquid inlet and a cooling liquid outlet, a cylindrical cavity 1332 is formed inside the valve body 133, the mandrel 134 is adaptively disposed in the cavity 1332, and the mandrel 134 is in transmission connection with the driving member 135, so that the mandrel 134 can move left and right in the cavity 1332.

In a preferred embodiment, a cavity 1341 is formed inside the mandrel 134, two liquid inlet channels 1342 and two liquid outlet channels 1343 are formed on the mandrel 134 on two sides of the cavity 1341, and the two liquid inlet channels 1342 are respectively connected to the liquid inlet 1331 when the mandrel 134 moves, and the two liquid outlet channels 1343 are respectively connected to the two liquid outlets (the first liquid outlet 131 and the second liquid outlet 132) when the mandrel 134 moves, so as to ensure that the two liquid inlet channels 1342 and the two liquid outlet channels 1343 of the mandrel 134 are aligned with the liquid inlet 1331 and the two liquid outlets of the valve body 133 in operation.

In the above technical solution, the working principle of the temperature control valve 130 is as follows:

As shown in fig. 4, when the driving member 135 is started, the position of the driving spindle 134 moves leftward in the cavity 1332, so that one of the liquid inlet passages 1342 is communicated with the liquid inlet 1331, and meanwhile, the left liquid outlet passage 1343 is communicated with the first liquid outlet 131 to form a passage from the liquid inlet 1331 to the first liquid outlet 131, and the liquid heater 100 is used for heating the motor 200 connected with the first liquid outlet 131.

Similarly, as shown in fig. 5, when the driving member 135 is started, the position of the driving spindle 134 moves rightward in the cavity 1332, and then one of the liquid inlet channels 1342 is communicated with the liquid inlet 1331, and meanwhile, the liquid outlet channel 1343 on the right side is communicated with the second liquid outlet 132 to form a channel from the liquid inlet 1331 to the second liquid outlet 132, so that the liquid heater 100 is used for heating the air heating device 300 connected with the second liquid outlet 132.

In a second aspect, the present invention applies the liquid heater 100 to the automotive field, so as to provide an automotive heating system for implementing dual-system heating, as shown in fig. 6, the automotive heating system includes an engine 200, a heater 300, and the liquid heater 100 according to the first aspect of the present invention, a water inlet end of the engine 200 is connected to a first liquid outlet 131 of the liquid heater 100, and a water outlet end of the engine 200 is connected to the liquid inlet of the liquid heater 100, so as to form a circulation loop for directly heating the engine 200 by the liquid heater 100; the hot water inlet of the warm air device 300 is connected to the second liquid outlet 132 of the liquid heater 100, the cold water outlet of the warm air device 300 is connected to the water inlet end of the engine 200, and the cold water is returned to the liquid heater 100 again through the water outlet end of the engine 200 for circulation.

In a preferred embodiment, the heating system for an automobile further comprises a fuel tank 400 and a fuel intake pipe 500, and both ends of the fuel intake pipe 500 are connected to the fuel tank 400 and the liquid heater 100, respectively.

In a preferred embodiment, the automobile heating system further includes an electromagnetic oil pump 600, and the electromagnetic oil pump 600 is disposed on the oil intake pipe 500.

Referring to fig. 7, when the liquid heater 100 is mounted on the whole vehicle, a user only needs to connect one water inlet pipe to the circulation pump 160 of the liquid heater 100, and two water outlet pipes are respectively connected to the water inlet pipe of the water pump of the engine 200 and the water inlet pipe of the warm air device 300, so that the pipeline design of the engine 200 preheating and warm air device 300 is simplified, and the heating efficiency of the engine cylinder and the warm air system is improved.

In operation, the liquid heater 100 takes oil from the oil tank 400 through the electromagnetic oil pump 600, atomizes, ignites and burns inside the liquid heater 100, and heats the cooling liquid through the heat exchanger 120; meanwhile, the liquid heater 100 takes water from a water intake at the upper part of the cylinder of the engine 200 through the circulating pump 160, heats the water through the heat exchanger 120, and when the temperature collector 140 detects that the temperature of the cooling liquid at the liquid inlet is lower, that is, the temperature of the cooling liquid of the engine 200 is lower (T < 30 ℃), the controller 150 controls the heated cooling liquid to flow out from the first liquid outlet 131 through the temperature control valve 130 and directly returns to the water inlet pipe of the water pump of the engine 200 to rapidly heat the cylinder of the engine; when the temperature collector 140 detects that the temperature of the cooling liquid at the liquid inlet is higher, that is, the temperature of the cooling liquid at the engine 200 is higher (T is more than or equal to 30 ℃), the controller 150 controls the heated cooling liquid to flow out of the second liquid outlet 132 through the temperature control valve 130, and the high-temperature cooling liquid flows into the warm air device 300, so that the passenger cabin or the equipment can be heated; and even in the parking condition (engine 200 is not started), heating of warm air device 300 by liquid heater 100 can be realized, and the practicality of liquid heater 100 is greatly improved.

In this embodiment, the operating principle of the thermo-valve 130 when the liquid heater 100 is applied to the heating system of the automobile is as follows:

When the temperature detected by the temperature collector 140 and received by the controller 150 is lower than a set value (for example, T is less than 30 ℃), the driving member 135 works to switch the position of the mandrel 134 to the left side, at this time, the cooling liquid flowing through the temperature control valve 130 flows out from the first liquid outlet 131 through the mandrel 134, and the heated low-temperature cooling liquid returns to the water pump inlet of the engine 200 to directly heat the engine cylinder; when the temperature detected by the temperature collector 140 received by the controller 150 is higher than a set value (for example, T is greater than or equal to 30 ℃), the driving member 135 works to switch the position of the mandrel 134 to the right, and at this time, the cooling liquid flowing through the temperature control valve 130 flows out from the second liquid outlet 132 through the mandrel 134, and the heated high-temperature cooling liquid flows to the warm air device 300, so that the passenger cabin or the equipment can be heated.

In a third aspect, the present invention provides a method for heating an automobile to achieve dual-system heating, as shown in fig. 7, a liquid heater 100 is provided with a water pump to take cooling liquid from a cylinder or a cylinder cover of an engine 200, the cooling liquid is heated by the liquid heater 100, the liquid heater 100 comprises a first liquid outlet 131 and a second liquid outlet 132, the first liquid outlet 131 is connected to a water inlet of the engine 200, the second liquid outlet 132 is connected to a warm air device 300, and the cooling liquid returns to the water inlet of the engine 200 after heating the warm air device 300. Therefore, the heating method is realized based on the automobile heating system provided by the second aspect of the invention, and specifically comprises the following steps:

Step 1, pre-storing a preset temperature value for switching different liquid outlet openings of the liquid heater 100;

Step 2, obtaining a liquid inlet temperature value of a liquid inlet of the liquid heater 100;

And step 3, comparing the liquid inlet temperature value with a preset temperature value, and controlling the opening of the liquid outlet corresponding to the liquid heater 100 according to the comparison result to realize heating of different heating systems.

In a preferred embodiment, the control method further comprises:

and 4, pre-storing a protection temperature value, and controlling the liquid heater 100 to stop heating work and keeping the circulating pump running when the acquired liquid inlet temperature value of the liquid inlet of the liquid heater 100 is greater than or equal to the protection temperature value.

In a preferred embodiment, the preset temperature value T is 30 ℃ and the protection temperature value T is 80 ℃.

In this way, in a low-temperature use environment, the liquid heater 100 heats the cooling liquid in the cylinder body of the engine 200, and the heated cooling liquid directly returns to the engine cylinder body, so that the engine can be quickly preheated, and the engine is assisted to start at a low temperature; when the temperature of the cooling liquid in the cylinder body of the engine 200 rises and the temperature collector 140 of the liquid heater 100 detects that the water inlet temperature is higher (more than or equal to 30 ℃), the temperature control valve 130 switches the opening and closing state of the water outlet pipe (namely, the first liquid outlet 131 is switched to the second liquid outlet 132), the cooling liquid heated by the liquid heater 100 flows to the warm air device 300, and returns to the cylinder body of the engine 200 after heating the warm air device 300, so that the cold air blowing of the warm air device 300 caused by low-temperature cooling liquid can be avoided, the high-temperature cooling liquid required by warm air can be continuously supplied to the passenger cabin under the parking (the engine 200 is not started) state, the engine 200 can also avoid engine abrasion, reduce noise in the cabin and save energy.

In summary, the liquid heater, the automobile heating system for realizing double-system heating and the heating control method provided by the invention can rapidly heat the engine cylinder body in a low-temperature environment, and are beneficial to low-temperature smooth starting of the engine; after the water temperature rises, the warm air device is automatically heated, so that the phenomenon that the warm air device blows cold air is avoided; the parking working condition (engine is not started) can be achieved, the direct heating warm air device is directly heated, and the parking heating function is achieved. Because the whole heating process can realize double-system automatic heating without manual control, the double-system automatic heating device can be popularized and applied in engineering machinery industry and automobile industry, and has higher application value in the field of off-road vehicles which are frequently used in low-temperature environments.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any of various other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A liquid heater, comprising:

the shell is provided with a liquid inlet;

A heat exchanger disposed inside the housing;

the temperature control valve is arranged on the heat exchanger and is provided with a plurality of liquid outlets for connecting a plurality of external heating systems;

the temperature collector is arranged on a connecting pipeline from the liquid inlet to the heat exchanger; and;

The controller is fixed on the shell, and the controller is respectively and electrically connected with the temperature collector and the temperature control valve, and the controller controls the temperature control valve to open different liquid outlets according to the liquid inlet temperature acquired by the temperature collector.

2. The liquid heater of claim 1, further comprising a circulation pump disposed at the liquid inlet, the temperature collector being disposed on a connection line from the circulation pump to the heat exchanger.

3. The liquid heater as claimed in claim 2, further comprising an air inlet pipe and an air outlet pipe connected to the air inlet and the air outlet on the housing, respectively.

4. The liquid heater as claimed in claim 1, wherein the temperature control valve comprises a valve body, a mandrel and a driving member, two sides of the valve body are respectively provided with a liquid inlet and two liquid outlets, a cylindrical cavity is formed inside the valve body, the mandrel is arranged in the cavity in a matching manner, and the mandrel is in transmission connection with the driving member, so that the mandrel can move left and right in the cavity.

5. The liquid heater as claimed in claim 4, wherein a cavity is formed in the mandrel, two liquid inlet channels and two liquid outlet channels are respectively formed on the mandrels at two sides of the cavity, the two liquid inlet channels are respectively connected with the liquid inlet when the mandrel moves, and the two liquid outlet channels are respectively connected with the two liquid outlet when the mandrel moves.

6. An automobile heating system for realizing double-system heating is characterized by comprising an engine, a warm air device and the liquid heater according to any one of claims 1-5, wherein the water inlet end of the engine is connected with one of the liquid outlets of the liquid heater, the water outlet end of the engine is connected with the liquid inlet of the liquid heater, the hot water inlet of the warm air device is connected with the other liquid outlet of the liquid heater, and the cold water outlet of the warm air device is connected with the water inlet end of the engine.

7. The dual system heating vehicle heating system of claim 6, further comprising an oil tank and a riser, wherein two ends of the riser are connected to the oil tank and the liquid heater, respectively.

8. The dual system heating vehicle heating system of claim 7, further comprising an electromagnetic oil pump disposed on the oil extraction pipe.

9. An automobile heating method for realizing double-system heating, which is characterized in that the heating method is realized based on the automobile heating system for realizing double-system heating according to claim 6, and specifically comprises the following steps:

Pre-storing a preset temperature value for switching different liquid outlet openings of the liquid heater;

acquiring a liquid inlet temperature value of a liquid inlet of the liquid heater;

And comparing the liquid inlet temperature value with a preset temperature value, and controlling the opening of the liquid outlet corresponding to the liquid heater according to a comparison result to realize heating of different heating systems.

10. The method for heating an automobile to achieve dual system heating according to claim 9, wherein the heating method further comprises:

Pre-storing a protection temperature value, and controlling the liquid heater to stop heating work and keeping the circulating pump running when the acquired liquid inlet temperature value of the liquid inlet of the liquid heater is larger than or equal to the protection temperature value.