CN202381208U - Engineering vehicle used heating system and crane with same - Google Patents
Engineering vehicle used heating system and crane with same Download PDFInfo
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- CN202381208U CN202381208U CN2011205519115U CN201120551911U CN202381208U CN 202381208 U CN202381208 U CN 202381208U CN 2011205519115 U CN2011205519115 U CN 2011205519115U CN 201120551911 U CN201120551911 U CN 201120551911U CN 202381208 U CN202381208 U CN 202381208U
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Abstract
The utility model discloses an engineering vehicle used heating system, which includes an engine and a heater, wherein the engine is provided with an engine water outlet pipe and an engine water inlet pipe, and the heater is provided with a heater water inlet pipe and a heater water outlet pipe; the heater water inlet pipe is communicated with the engine water outlet pipe; the heater water outlet pipe is connected with a cooling liquid distribution part; the cooling liquid distribution part distributes the cooling liquid to a warm air part, an oil tank or an engine water return pipe; the warm air part, the oil tank and the water outlet end of the engine water return pipe are communicated with the engine water inlet pipe. the engineering vehicle used heating system disclosed by the utility model efficiently improves the low temperature starting ability of the engine, the heating performance of warm air and the temperature of hydraulic oil, reduces the power consumption of the whole heating system, avoids the danger that the electric quantity of a battery is exhausted, and meanwhile, the production cost of the whole heating system is also lowered.
Description
Technical field
The utility model relates to the heating system technical field, particularly relates to a kind of engineering vehicle and uses heating system.In addition, the utility model also relates to a kind of hoist with above-mentioned engineering vehicle with heating system.
Background technique
As everyone knows; Engineering vehicle all can be furnished with a motor; The effect of motor also will provide power for the various operations of engineering vehicle except being the going the power that provides enough of engineering vehicle, and engineering vehicle is delivered to actuator with power by motor through hydraulic system when operation.In addition, the cooling liquid of motor also can provide heating required heat to the operator cabin at driver place, make the driver that a warm driving environment can be arranged under the weather of cold.
But, when working under the environment of engineering vehicle in cold through regular meeting following problem appears:
The first, the engine body temperature is low excessively, starts difficulty;
The second, coolant temperature is low, and the warm braw poor effect can not in time defrost, and the temperature of operator cabin also is in lower state;
The 3rd, the hydraulic oil too thickness that under low temperature environment, becomes causes engineering vehicle actuator when operation slow in one's movements, attonity then when serious.
In order to address the above problem, engineering vehicle of the prior art has adopted engine body heating, warm braw heating with heating system, and the independent mode of heating of three parts of fuel tank heating, below in conjunction with accompanying drawing these three kinds of mode of heatings is described.
At first be the engine body heating, as shown in Figure 1, heater a is connected between the water outlet and water inlet of motor b, for engine body heats separately.
Particularly; The motor water outlet of cooling liquid before the thermostat c flows to warm braw d and heater a respectively; An one-way valve e is installed on the branch line that flows to warm braw d,, and flows to motor b from motor sewer f from the cooling liquid of warm braw d and heater a outflow flow direction engine sewer f all.
When coolant temperature was low, thermostat c did not open.Be motor b heating this moment; The motor water outlet of cooling liquid before the thermostat c flows to heater a; Cooling liquid through after the heater a heating flows back in the motor b through motor sewer f; Thereby be reached for the purpose of engine body heating, the effect of one-way valve e is to prevent that cooling liquid from circulating in warm braw d loop, influences the effect of heated engine b.
Next, in conjunction with Fig. 2 the fuel tank heating is described.
The electrically heated form of the main at present employing of the heating of fuel tank and fuel tank promptly at the inner resistance wire h that installs of casing g, relies on the heat that produces after the resistance wire h energising that the fluid in the casing g is heated.
At last, in conjunction with Fig. 3 the warm braw heating is described.
At present, warm braw heating mainly is that to utilize the waste heat of the waste gas that motor b produces be that the flow through cooling liquid of warm braw d heats, and the parts that play a major role in this process are the water jacket j that are wrapped on the engine exhaust pipe i.The cooling liquid that the water outlet of motor b before the thermostat c flows out is introduced into water jacket j, in water jacket j, accomplishes the absorption to waste-gas heat, flows to warm braw d then, and flows back to motor b through motor sewer f.
Three above-mentioned part heat forms independently exist separately, do not make full use of heater, and heats is limited, and whole engineering vehicle with the heating system application decentralization, function control is complicated, mounting structure is more, the layout difficulty is big.
The model utility content
The purpose of the utility model provides a kind of engineering vehicle and uses heating system, and this heating system is also simplified with heating system engineering vehicle in heating capacity that has improved the cold-starting ability of motor, warm braw and hydraulic fluid temperature.Another purpose of the utility model provides a kind of hoist with above-mentioned engineering vehicle with heating system.
For solving the problems of the technologies described above, the utility model provides a kind of engineering vehicle to use heating system, comprising: motor has engine water outlet and water inflow of the engine pipe; Heater; Have tube, heater inlet and heater outlet pipe; Said tube, heater inlet is communicated with said engine water outlet; Said heater outlet pipe is connected with the cooling liquid dispenser, and said cooling liquid dispenser is selected a ground with cooling liquid and is dispensed to warm braw portion, fuel tank and motor return pipe, and the waterexit end of said warm braw portion, fuel tank and motor return pipe is communicated with said water inflow of the engine pipe.
Preferably, said cooling liquid dispenser is a four way ball valve.
Preferably, this project vehicle also comprises the four-way interface with heating system, and the influent side of said four-way interface is communicated with the waterexit end of said warm braw portion, fuel tank and motor return pipe, and the water outlet side of said four-way interface is communicated with said water inflow of the engine pipe.
Preferably, be provided with the cooling liquid pipeline in the said fuel tank, the feed-water end of said cooling liquid pipeline is communicated with said cooling liquid dispenser, and its waterexit end is communicated with said water inflow of the engine pipe.
Preferably, said cooling liquid pipeline comprises the U-shaped pipe portion that a plurality of head and the tail connect.
Preferably, this project vehicle also comprises the radiator that is communicated with said engine water outlet and said water inflow of the engine pipe with heating system, on the radiator inleting pipe of said radiator, thermostat is installed.
The utility model also provides a kind of hoist, and this hoist comprises that above-mentioned each described engineering machinery uses heating system.
The engineering vehicle of the utility model connects the cooling liquid dispenser with heating system on the heater outlet pipe; Select a ground through this cooling liquid dispenser and distribute cooling liquid to warm braw portion, fuel tank and motor return pipe; Each part can both be carried out exchange heat with the cooling liquid through heater heats fully; Improve the cold-starting ability of motor, the heating capacity of warm braw and the temperature of hydraulic oil effectively, helped the temperature of engineering vehicle each several part under the working environment of cold to satisfy the condition of proper functioning apace.And the cooling liquid dispenser is incorporated into warm braw heating, fuel tank heating and engine body heating in the heating system; Water jacket and resistance wire have been cancelled; Reduced the power consumption of whole heating system; The danger of having avoided battery electric quantity to exhaust, the while has also been reduced the cost of production of whole heating system.
In a kind of preferred implementation of the utility model; Adopt the cooling liquid pipeline of the U-shaped pipe portion that comprises that a plurality of head and the tail connect in the fuel tank; Increased the area of contact of cooling liquid pipeline and fluid; Effectively improve heat conducting efficient, helped the fluid in the fuel tank to reach the required temperature of proper functioning rapidly.
Description of drawings
Fig. 1 is an engine body heating schematic diagram in the existing technology;
Fig. 2 is a fuel tank heating schematic diagram in the existing technology;
Fig. 3 is a warm braw heating schematic diagram in the existing technology;
Fig. 4 is the composition structural representation of the engineering vehicle of the utility model with heating system;
Fig. 5 is the fuel tank internal structural representation.
Embodiment
The core of the utility model provides a kind of engineering vehicle and uses heating system, and this heating system is also simplified with heating system engineering vehicle in heating capacity that has improved the cold-starting ability of motor, warm braw and hydraulic fluid temperature.Another core of the utility model provides a kind of hoist with above-mentioned engineering vehicle with heating system.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is done further to specify below in conjunction with accompanying drawing and embodiment.
Please refer to the engineering vehicle that the utility model provided shown in Figure 4 composition structural representation with a kind of mode of execution of heating system.
Engineering vehicle shown in Figure 4 comprises motor 10 and heater 30 with the embodiment of heating system, and the heating of motor 10 is mainly flowed through through cooling liquid and flowed back to motor 10 realizations after heater 30 is heated again.Particularly; Motor 10 is provided with engine water outlet 11 and water inflow of the engine pipe 13; Heater 30 is provided with tube, heater inlet 31 and heater outlet pipe 33; Wherein, the engine water outlet 11 of motor 10 is communicated with the tube, heater inlet 31 of heater 30, realizes that cooling liquid flows to heater 30 from motor 10; The heater outlet pipe 33 of heater 30 is communicated with water inflow of the engine pipe 13 through motor return pipe 20, and water inflow of the engine pipe 13 is provided with water pump 80, and the realization cooling liquid is to the backflow of motor 10, the circulation of a complete cooling liquid of formation.Cooling liquid reduces heat transferred motor 10 back temperature; Flow to heater 30 through engine water outlet 11 more subsequently; After heating, flow back to motor 10 by water inflow of the engine pipe 13 again, start necessary heat under the low temperature environment for motor 10 is provided at so circularly.
From Fig. 4, it can also be seen that; Also there is the branch road that flows to warm braw portion 70 and fuel tank 90 in heater outlet pipe 33 except flow direction engine 10; In other words cooling liquid again through after the heating of heater 30 except providing the heat for motor 10; Can also with fuel tank 90 heat be provided to warm braw portion 70, obtain suitable temperature to guarantee operator cabin, the oil liquid temperature in the fuel tank reaches qualified standard.
If cooling liquid is through provide heat will make spread heat to motor 10, warm braw portion 70 and fuel tank 90 after the heating of heater 30 simultaneously; The heat of distributing to each branch road can be very limited, causes motor 10, warm braw portion 70 and fuel tank 90 threes all to be difficult to reach the temperature standard of regulation probably.
From the consideration of concentrating the heat that effectively utilizes cooling liquid; As shown in Figure 4; On heater outlet pipe 33, connect a cooling liquid dispenser 50; Cooling liquid dispenser 50 can adopt four way ball valve or solenoid valve, through this cooling liquid dispenser 50 cooling liquid is selected a ground and be dispensed to motor return pipe 20, warm braw portion 70 and fuel tank 90, and three's waterexit end is communicated with water inflow of the engine pipe 13; Just the fuel tank outlet pipe 93 of the warm braw portion outlet pipe 71 of motor return pipe 20, warm braw portion 70 and fuel tank 90 is communicated with water inflow of the engine pipe 13, to guarantee that cooling liquid can flow back to motor 10.When reality is implemented; Motor return pipe 20, warm braw portion outlet pipe 71 and fuel tank outlet pipe 93 can be communicated with water inflow of the engine pipe 13 respectively; Three interfaces promptly can be set on water inflow of the engine pipe 13 to be connected with above-mentioned three; And, a four-way interface 40 can be set as a kind ofly reducing pipeline, saving the preferred implementation take up room, earlier motor return pipe 20, warm braw portion outlet pipe 71 and fuel tank outlet pipe 93 are connected water inlet one side of four-way interface 40; Side in 40 water outlets of four-way interface connects four-way interface outlet pipe 41, and then four-way interface outlet pipe 41 is connected with motor return pipe 13.
The engineering vehicle of the utility model connects the cooling liquid dispenser with heating system on the heater outlet pipe; Select a ground through this cooling liquid dispenser and distribute cooling liquid to warm braw portion, fuel tank and motor return pipe; Each part can both make full use of the heat of cooling liquid; Improve the cold-starting ability of motor, the heating capacity of warm braw and the temperature of hydraulic oil effectively, helped the temperature of engineering vehicle each several part under the working environment of cold to satisfy the condition of proper functioning apace.And the cooling liquid dispenser is incorporated into warm braw heating, fuel tank heating and engine body heating in the heating system; Water jacket and resistance wire have been cancelled; Reduced the power consumption of whole heating system; The danger of having avoided battery electric quantity to exhaust, the while has also been reduced the cost of production of whole heating system.
Here also need combine Fig. 5 that the internal structure of fuel tank 90 is explained once.
Fuel tank of the prior art heats through resistance wire, however in order to adapt to the above-mentioned mode that heats through the heat transfer of cooling liquid, the set inside of fuel tank 90 special cooling liquid pipeline 91.As shown in Figure 4; The feed-water end of this cooling liquid pipeline 91 is communicated with cooling liquid dispenser 50; Its waterexit end is communicated with water inflow of the engine pipe 13; Particularly, the fuel tank outlet pipe 93 that can be described as fuel tank 90 is connected to earlier on the four-way interface 40, through four-way interface outlet pipe 41 realizations of four-way interface 40 and being communicated with of water inflow of the engine pipe 13.
In order to obtain better heat exchange effect; In cooling line shown in Figure 5 91, comprised the U-shaped pipe portion that a plurality of head and the tail connect; It is circuitous that cooling line 91 is wriggled in fuel tank 90; Increase the area of contact with fluid, effectively improved heat conducting efficient, helped the fluid in the fuel tank to reach the required temperature of proper functioning rapidly.
Below in conjunction with Fig. 4 the working principle of above-mentioned engineering vehicle with the mode of execution of heating system is described.
In the mode of execution of above-mentioned engineering vehicle with heating system, comprise three main heating links, i.e. motor heating, warm braw heating and fuel tank heating at first describe motor heating link.
When engineering machinery is in the working environment of low temperature,, need heat motor in order to guarantee that motor can overcome severe cold and start smoothly.When engineering machinery is in motor heating link with heating system; Cooling liquid enters into heater 30 through engine water outlet 11, is flowed out by heater outlet pipe 33 through the heating back to get into four way ball valve, at this moment; Four way ball valve will lead to the passageway shuts off of warm braw portion 70 and fuel tank 90; Cooling liquid can only flow direction engine return pipe 20, after reaching four-way interface 40 through motor return pipe 20, cooling liquid under the effect that is arranged on the water pump 80 on the water inflow of the engine pipe 13 by four-way interface outlet pipe 41 flow direction engine intake pipes 13; Flow back to motor 10 at last and carry out exchange heat, start required heat for motor 10 provides with motor 10.Said process carries out circulation till motor 10 reaches target temperature completion startup.
For the driver who guarantees engineering machinery can have a warm working environment; Avoid the invasion and attack of severe cold; Be responsible for warm air being provided by warm braw portion 70, and the warm air of warm braw portion 70 outputs is produced by the warm braw heating link of engineering machinery with heating system to operator cabin.When engineering machinery was in warm braw heating link with heating system, cooling liquid entered into heater 30 through engine water outlet 11, was flowed out by heater outlet pipe 33 through the heating back to get into four way ball valve; At this moment; Four way ball valve will lead to the pathway closure of motor return pipe 20 and fuel tank 90, and cooling liquid can only flow to warm braw portion 70, and air to be heated carries out heat exchange in getting into warm braw portion 70 backs and warm braw portion 70; Absorption of air to be heated behind the heat in the cooling liquid temperature rise; And advance operator cabin by warm braw portion 70 discharging, the cooling liquid that discharges heat then flow to four-way interface 40 through warm braw portion outlet pipe 71, again through four-way interface outlet pipe 41 inflow engine intake pipes 13; Flow back to motor 10 at last; Accomplished a complete warm braw heating cycle, warm braw portion 70 continues in operator cabin, to provide warm air along with constantly carrying out of said process, till the temperature in operator cabin is suitable.
As everyone knows; Actuator on the engineering machinery carries out work through hydraulic oil as dynamic medium mostly; But hydraulic oil under low temperature environment through regular meeting's thickness that becomes, the actuator's motion that causes engineering machinery slowly, serious even sign that have no motion.Can normally work in order to make actuator; Will solve the hydraulic oil problem of thickness that under low temperature environment, becomes; And the engineering machinery of the utility model just can play with the fuel tank of heating system heating link fluid is heated, and prevents the effect of hydraulic oil thicknessization under low temperature environment.When engineering machinery was in fuel tank heating link with heating system, cooling liquid entered into heater 30 through engine water outlet 11, was flowed out by heater outlet pipe 33 through the heating back to get into four way ball valve; At this moment, four way ball valve will lead to the pathway closure of motor return pipe 20 and warm braw portion 70, and cooling liquid can only flow to fuel tank 90; And get into fuel tank after 90s with fuel tank 90 in hydraulic oil carry out heat exchange; Temperature raise after hydraulic oil had absorbed the heat in the cooling liquid, moved closer to target temperature, and the cooling liquid that discharges heat then flow to four-way interface 40 through fuel tank outlet pipe 93; Again through four-way interface outlet pipe 41 inflow engine intake pipes 13; Flow back to motor 10 at last, so far, a complete fuel tank is accomplished heating cycle.After heating cycle, the hydraulic oil in the fuel tank 90 can satisfy the demand of proper functioning at several fuel tanks of process, and fuel tank heating link quits work.
From the above-mentioned description of working principle, can find out three heating links; Cooling liquid be through flow direction engine return pipe 20, warm braw portion 70 and fuel tank 90 threes after the heating of heater 30 one of them; If cooling liquid just has been in the state of higher temperature before getting into heater 30; Will be higher through heater 30 temperature after heating, as if this can play promoting effect to the carrying out of heating outwardly, but the too high meeting of the temperature of cooling liquid causes damage such as parts such as cylinder, cylinder head, intake valve, exhaust valves to some; Therefore, on the basis of above-mentioned engineering machinery, set up radiator 60 with the mode of execution of heating system.This radiator 60 is communicated with engine water outlet 11 and water inflow of the engine pipe 13; On the radiator inleting pipe 61 of radiator 60, thermostat 611 is installed; The trend that is used for decision cooling liquid after the temperature that has detected cooling liquid; If coolant temperature is higher, then thermostat 611 is opened cooling liquid introduced and is carried out heat release in the radiator 60, and cooling liquid is got back to motor through water inflow of the engine pipe 13 more then; If coolant temperature is lower, then thermostat 611 cooling liquid that keeps shut flows to heater 30.As for concrete criterion, be the boundary with 83 degrees centigrade usually.
Except above-mentioned engineering machinery with the heating system; The utility model also provides a kind of hoist with above-mentioned engineering machinery with heating system; This hoist above-mentioned engineering machinery with the effect of heating system under cold-starting ability, the heating capacity of warm braw and the temperature of hydraulic oil of motor all be improved; Help the temperature of engineering vehicle each several part under the working environment of cold to satisfy the condition of proper functioning apace, also realized the reduction of manufacture cost simultaneously.As for the concrete structure of this hoist with and please refer to existing technology with engineering machinery with the linkage structure of heating system, this paper repeats no more.
More than engineering vehicle that the utility model provided has been carried out detailed introduction with heating system and the hoist with it.Used concrete example among this paper the principle and the mode of execution of the utility model are set forth, above embodiment's explanation just is used to help to understand the method and the core concept thereof of the utility model.Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (7)
1. an engineering vehicle is used heating system, comprising:
Motor (10) has engine water outlet (11) and water inflow of the engine pipe (13);
Heater (30) has tube, heater inlet (31) and heater outlet pipe (33), and said tube, heater inlet (31) is communicated with said engine water outlet (11),
It is characterized in that; Said heater outlet pipe (33) is connected with cooling liquid dispenser (50); Said cooling liquid dispenser (50) is selected a ground with cooling liquid and is dispensed to warm braw portion (70), fuel tank (90) and motor return pipe (20), and the waterexit end of said warm braw portion (70), fuel tank (90) and motor return pipe (20) is communicated with said water inflow of the engine pipe (13).
2. engineering vehicle as claimed in claim 1 is used heating system, it is characterized in that, said cooling liquid dispenser (50) is a four way ball valve.
3. engineering vehicle as claimed in claim 2 is used heating system; It is characterized in that; Also comprise four-way interface (40); The influent side of said four-way interface (40) is communicated with the waterexit end of said warm braw portion (70), fuel tank (90) and motor return pipe (20), and the water outlet side of said four-way interface (40) is communicated with said water inflow of the engine pipe (13).
4. use heating system like each described engineering vehicle in the claim 1 to 3; It is characterized in that; Be provided with cooling liquid pipeline (91) in the said fuel tank (90); The feed-water end of said cooling liquid pipeline (91) is communicated with said cooling liquid dispenser (50), and its waterexit end is communicated with said water inflow of the engine pipe (13).
5. engineering vehicle as claimed in claim 4 is used heating system, it is characterized in that, said cooling liquid pipeline (91) comprises the U-shaped pipe portion that a plurality of head and the tail connect.
6. engineering vehicle as claimed in claim 5 is used heating system; It is characterized in that; Also comprise the radiator (60) that is communicated with said engine water outlet (11) and said water inflow of the engine pipe (13), on the radiator inleting pipe (61) of said radiator (60), thermostat (611) is installed.
7. a hoist has engineering vehicle and uses heating system, it is characterized in that, said engineering vehicle uses heating system to use heating system as each described engineering vehicle in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205519115U CN202381208U (en) | 2011-12-26 | 2011-12-26 | Engineering vehicle used heating system and crane with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205519115U CN202381208U (en) | 2011-12-26 | 2011-12-26 | Engineering vehicle used heating system and crane with same |
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| Publication Number | Publication Date |
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| CN202381208U true CN202381208U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205519115U Expired - Fee Related CN202381208U (en) | 2011-12-26 | 2011-12-26 | Engineering vehicle used heating system and crane with same |
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| Country | Link |
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| CN (1) | CN202381208U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788048A (en) * | 2012-09-07 | 2012-11-21 | 三一重机有限公司 | Engineering mechanical hydraulic oil tank, control method thereof and engineering machine |
| CN103397969A (en) * | 2013-07-30 | 2013-11-20 | 贵州詹阳动力重工有限公司 | Low-temperature start system of crawler all-terrain vehicle |
| CN104612877A (en) * | 2014-11-28 | 2015-05-13 | 中联重科股份有限公司渭南分公司 | Vehicle engine warming control equipment, system, method and engineering machine |
| CN105298694A (en) * | 2015-11-23 | 2016-02-03 | 三江瓦力特特种车辆有限公司 | Chassis heating device for special vehicle |
| CN106594005A (en) * | 2016-12-28 | 2017-04-26 | 湖南工业大学 | Device for preheating engineering vehicle hydraulic oil by using operation room air heating system |
| CN107762705A (en) * | 2017-11-16 | 2018-03-06 | 徐工集团工程机械股份有限公司科技分公司 | A kind of extremely cold pre-heating system of loading machine |
| CN112096699A (en) * | 2020-09-17 | 2020-12-18 | 上海三一重机股份有限公司 | Hydraulic oil heat exchange system and excavator |
| CN112963283A (en) * | 2021-03-09 | 2021-06-15 | 徐工集团工程机械股份有限公司道路机械分公司 | Engine preheating system and preheating method thereof |
| CN113276633A (en) * | 2021-06-08 | 2021-08-20 | 徐州天一红点车用空调有限公司 | Non-fuel air conditioner heating system for crane and method thereof |
-
2011
- 2011-12-26 CN CN2011205519115U patent/CN202381208U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788048A (en) * | 2012-09-07 | 2012-11-21 | 三一重机有限公司 | Engineering mechanical hydraulic oil tank, control method thereof and engineering machine |
| CN103397969A (en) * | 2013-07-30 | 2013-11-20 | 贵州詹阳动力重工有限公司 | Low-temperature start system of crawler all-terrain vehicle |
| CN104612877A (en) * | 2014-11-28 | 2015-05-13 | 中联重科股份有限公司渭南分公司 | Vehicle engine warming control equipment, system, method and engineering machine |
| CN105298694A (en) * | 2015-11-23 | 2016-02-03 | 三江瓦力特特种车辆有限公司 | Chassis heating device for special vehicle |
| CN106594005A (en) * | 2016-12-28 | 2017-04-26 | 湖南工业大学 | Device for preheating engineering vehicle hydraulic oil by using operation room air heating system |
| CN107762705A (en) * | 2017-11-16 | 2018-03-06 | 徐工集团工程机械股份有限公司科技分公司 | A kind of extremely cold pre-heating system of loading machine |
| CN107762705B (en) * | 2017-11-16 | 2023-06-06 | 徐工集团工程机械股份有限公司科技分公司 | Extremely cold preheating system of loader |
| CN112096699A (en) * | 2020-09-17 | 2020-12-18 | 上海三一重机股份有限公司 | Hydraulic oil heat exchange system and excavator |
| CN112963283A (en) * | 2021-03-09 | 2021-06-15 | 徐工集团工程机械股份有限公司道路机械分公司 | Engine preheating system and preheating method thereof |
| CN113276633A (en) * | 2021-06-08 | 2021-08-20 | 徐州天一红点车用空调有限公司 | Non-fuel air conditioner heating system for crane and method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20201226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |