CN202369895U - Radiator system, control system and double-steel-wheel road roller - Google Patents
Radiator system, control system and double-steel-wheel road roller Download PDFInfo
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- CN202369895U CN202369895U CN2011204301029U CN201120430102U CN202369895U CN 202369895 U CN202369895 U CN 202369895U CN 2011204301029 U CN2011204301029 U CN 2011204301029U CN 201120430102 U CN201120430102 U CN 201120430102U CN 202369895 U CN202369895 U CN 202369895U
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Abstract
The utility model relates to the technical field of engineering machinery and discloses a radiator system, a control system and a double-steel-wheel road roller. The radiator system comprises a first radiator, a second radiator and/or a third radiator, wherein a cooling liquid outlet of the first radiator is selectively and directly communicated with a cooling liquid circuit in an engine through a first direction control valve or is communicated with the cooling liquid circuit in the engine after passing through the second radiator, a hydraulic oil outlet of the first radiator is selectively and directly communicated with a hydraulic oil tank through a second direction control valve or is communicated with the hydraulic oil tank after passing through the third radiator. According to the radiator system provided by the embodiment of the utility model, the cooling liquid and the hydraulic oil cooled by the first radiator can be cooled again conveniently according to needs as an auxiliary cooling device is correspondingly configured for the first radiator, the problem that the hydraulic oil or the cooling liquid exceeds the normal temperature caused by the insufficient radiation when the first radiator fails or is under the extreme environment can be solved, the adaptive capacity to environment is improved, and the safety redundancy is also improved.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly relates to a kind of cooling system, control system and dual-steel wheel road roller.
Background technology
Dual-steel wheel road roller is widely used in the compacting operation of flexible pavement, and is as shown in Figure 1, and the cooling system of dual-steel wheel road roller is made up of liquid circulation pipeline 12 and 13, expansion tank 14, cooling fan 15, guide housing 16 and three-in-one radiator 17.Three-in-one radiator 17 is the block form composite construction, is made up of cooling water radiator, absolutely empty charge air cooler and hydraulic oil radiator, and wherein, cooling water radiator is used to cool off Diesel engine 11, Diesel engine 11 is maintained under the optimum temperature work; Hydraulic oil radiator is used to cool off hydraulic oil, avoids the temperature of hydraulic oil to surpass maximum permissible service temperature.In existing mounting means, usually three-in-one radiator 17 is arranged at motor 11 ends, the 15 pairs of three-in-one radiators of cooling fan 17 that carry through motor 11 carry out air draught or blowing, thereby realize interchange of heat.
The operating principle of above-mentioned cooling system cooled engine 11 cooling fluids is following: when the temperature of motor 11 cooling liquid outlets is lower than a certain setting value (for example 85 ℃); The thermostat at motor 11 cooling liquid outlet places is in closed condition, and the cooling fluid operating heat radiation system is in the partial circulating mode of operation of motor 11; When the temperature of motor 11 cooling liquid outlets is higher than a certain setting value (for example 85 ℃); The thermostat at motor 11 cooling liquid outlet places is in opening; The systemic circulation mode of operation of motor 11 is opened, and the cooling fluid of higher temperature flows out from the cooling liquid outlet of motor 11, after the cooling water radiator cooling through combined heat radiator 17; Return the cooling liquid inlet of motor 11, to realize cooling to motor 11 moving components.
The operating principle of above-mentioned cooling system cooling hydraulic oil is following: the oil return of hydraulic system parts high-temperature is pooled in the oil return piece 20 of dual-steel wheel road roller; Concentrate from an oil-out of oil return piece 20 and flow out; Get in the combined heat radiator 17 through pipeline 19, after hydraulic oil radiator cooling wherein, get back in the hydraulic oil container 21 through pipeline 18 again; Thereby realize cooling, make that the maximum temperature of hydraulic oil remains under the maximum permissible service temperature in the hydraulic system hydraulic oil.
At present; Above-mentioned radiating mode is widely used in the dual-steel wheel road roller dynamical system; But have following problem: i, when under the environment of road roller at thermal extremes during (for example Africa area) construction; Cooling water radiator, hydraulic oil radiator are worked under maximum load simultaneously, will bring huge test to cooling system; Ii, break down or it is during with belt creep that motor links to each other when cooling fan; Engine coolant radiator heat-dissipation scarce capacity; But hydraulic oil and cooling fluid will be above the highest serviceability temperatures of its permission; Thereby influence the operate as normal of road roller, even cause the damage of road roller component.
Therefore, demand urgently improving to existing cooling system.
The utility model content
The utility model is intended to propose a kind of cooling system, control system and dual-steel wheel road roller; Through being cooling system configuration radiator cooler, road roller cooling system when constructing breaks down suddenly or the not enough problem of heat-sinking capability under extreme environment in the prior art to solve.
On the one hand, the utility model provides a kind of cooling system, and this cooling system comprises and be used for first radiator that engine coolant and/or hydraulic oil are cooled off, wherein:
Said first radiator is provided with cooling liquid inlet and cooling liquid outlet; Said cooling system also comprises the first direction control valve and second radiator, and said cooling liquid outlet optionally directly is communicated in through said first direction control valve or behind said second radiator, is communicated in in-engine coolant circuit;
And/or
Said first radiator is provided with hydraulic oil import and hydraulic oil outlet; Said cooling system also comprises second direction control valve and the 3rd radiator, and said hydraulic oil outlet optionally directly is communicated in through said second direction control valve or behind said the 3rd radiator, is communicated in hydraulic oil container.
Further, said first direction control valve, said second direction control valve are two-position three way magnetic valve.
Further, said second radiator, said the 3rd radiator are heat-exchangers of the plate type; Said radiator system also comprises and is used to the water tank that said second radiator and/or said the 3rd radiator provide the water circulation heat radiation.
Further, be provided with the first water circulation heat-radiation loop between said water tank and said second radiator; And/or be provided with the second water circulation heat-radiation loop between said water tank and said the 3rd radiator.
Further, the said first water circulation heat-radiation loop is provided with first water pump and first strainer, and said first strainer is located between said first water pump and the said water tank; The said second water circulation heat-radiation loop is provided with second water pump and second strainer, and said second strainer is located between said second water pump and the said water tank.
Further, be provided with cooling fluid heat abstractor and/or hydraulic oil heat abstractor in said first radiator, be used for to said cooling fluid heat abstractor and/or said hydraulic oil heat abstractor blow heat radiation cooling fan and be used for the blow guide housing of guiding of said cooling fan.
Further, said cooling liquid inlet is communicated in in-engine coolant circuit, and the connecting pipeline between said cooling liquid inlet and the said coolant circuit is provided with thermostat; Said hydraulic oil import is communicated in the oil-out of the oil return piece of hydraulic system.
Further, said cooling system is arranged on the dual-steel wheel road roller, and said water tank is the watering water tank on the said dual-steel wheel road roller.
On the other hand, the utility model also provides a kind of control system that is applied to above-mentioned each described cooling system, and this control system comprises:
Acquiring unit, the temperature that is used to obtain the temperature of cooling liquid inlet and/or is used to obtain the hydraulic oil import;
Judging unit, the temperature that is used to judge cooling liquid inlet whether greater than first setting value and/or the temperature that is used to judge the hydraulic oil import whether greater than second setting value;
Performance element; When being used for temperature at cooling liquid inlet less than first setting value; Control first direction control valve works in and makes cooling liquid outlet directly be communicated in the state of in-engine coolant circuit; During greater than first setting value, control first direction control valve works in and makes cooling liquid outlet behind said second radiator, be communicated in the state of in-engine coolant circuit in the temperature of cooling liquid inlet; And/or when being used for temperature in the hydraulic oil import less than second setting value; Control second direction control valve works in and makes the hydraulic oil outlet directly be communicated in the state of hydraulic oil container; During greater than second setting value, control second direction control valve works in and makes the hydraulic oil outlet behind said the 3rd radiator, be communicated in the state of hydraulic oil container in the temperature of hydraulic oil import.
Further, said cooling liquid inlet place is provided with first temperature pick up, and said hydraulic oil import department is provided with second temperature pick up, and said acquiring unit obtains temperature data from said first temperature pick up or said second temperature pick up.
Another aspect, the utility model also provide a kind of dual-steel wheel road roller, and this dual-steel wheel road roller is provided with above-mentioned each described cooling system.
Further, said second radiator, said the 3rd radiator are arranged in the driver's cabin of said dual-steel wheel road roller.
A kind of cooling system that the utility model provides and a kind of dual-steel wheel road roller that is provided with this control system; On the basis of existing technology; It is the first heat sink arrangements radiator cooler; So that as required cooling fluid and/or hydraulic oil through the cooling of first radiator are cooled off once more; When avoiding first radiator to break down or be under the extreme environment and exceed normal temperature, both improved adaptive capacity to environment, also improved safety redundancy because of the deficiency of dispelling the heat causes hydraulic oil and/or cooling fluid; A kind of control system that is applied to this cooling system that the utility model provides; The temperature through obtaining cooling liquid inlet in real time and/or the temperature of hydraulic oil import; So that the size according to this temperature determines whether to launch radiator cooler, realized freely switching under two kinds of mode of operations.
Description of drawings
Fig. 1 is the structural representation of existing a kind of cooling system;
The principle schematic of a kind of cooling system that Fig. 2 provides for the utility model embodiment;
A kind of structured flowchart that is applied to the control system of cooling system shown in Figure 2 that Fig. 3 provides for the utility model embodiment.
The specific embodiment
In order to make those skilled in the art understand the technical scheme of the utility model better, the utility model is done further to specify below in conjunction with accompanying drawing and specific embodiment.Should be pointed out that description and the description order to concrete structure only is the explanation to specific embodiment in this part, should not be regarded as that the protection domain of the utility model is had any restriction.
Please refer to Fig. 2 and Fig. 3, wherein, the principle schematic of a kind of cooling system that Fig. 2 provides for the utility model embodiment, a kind of structured flowchart that is applied to the control system of cooling system shown in Figure 2 that Fig. 3 provides for the utility model embodiment.Combine Fig. 2 and Fig. 3 to describe below simultaneously.
As shown in Figure 2; This cooling system mainly comprises cooling fan 101, first radiator 102, guide housing 103, first direction control valve 108, second radiator 110, second direction control valve 113, the 3rd radiator 115 and water tank 116 etc., and its structure and annexation are following:
First direction control valve 108 is two-position two-way solenoid valve with second direction control valve 113; Second radiator 110 and the 3rd radiator 115 are heat-exchangers of the plate type; The concrete internal construction of heat-exchangers of the plate type can not given unnecessary details referring to the associated description of prior art now.
Be provided with the first water circulation heat-radiation loop between the water tank 116 and second radiator 110; The inside of this first water circulation heat-radiation loop pile warp, second radiator 110; The first water circulation heat-radiation loop is provided with first water pump 112 and first strainer, 114, the first strainers 114 are arranged between first water pump 112 and the water tank 116; Be provided with the second water circulation heat-radiation loop between water tank 116 and the 3rd radiator 115; The inside of this second water circulation heat-radiation loop pile warp the 3rd radiator 115; The second water circulation heat-radiation loop is provided with second water pump 117 and second strainer, 119, the second strainers 119 are arranged between second water pump 117 and the water tank 116.
Need to prove; Thermostat (being located between the coolant circuit in cooling liquid inlet 104 and the motor 100) is actually a valve, and its principle is that utilization can be with the flexible material of temperature, and for example the material of paraffin or ether and so on is done controlled valve; Material expands and backs down valve when water temperature is high; Motor 100 cooling fluids are carried out systemic circulation, and material shrinks valve-off when water temperature is low, and motor 100 cooling fluids are carried out partial circulating.
In the course of the work; The operating principle that cooling fluid is cooled off is following: when the temperature of the coolant circuit in the motor 100 was higher, thermostat was opened, and cooling fluid is in the systemic circulation duty; Cooling fluid gets into first radiator from cooling liquid inlet 104; When the temperature of cooling liquid inlet 104 does not surpass setting value (for example 95 ℃), make first direction control valve 108 be in power failure state, at this moment; Cooling fluid only needs directly to flow back in the motor 100 through cooling liquid outlet 106 through first radiator, 102 cooling backs, can satisfy the needs that cooling fluid reduces temperature; When the temperature of cooling liquid inlet 104 surpasses setting value (for example 95 ℃); Make first direction control valve 108 be in electricity condition and launch first water pump 112; At this moment; Cooling fluid not only needs the cooling through first radiator 102, also need get into to return in the motor 100 after cooling off in second radiator 110, to satisfy the needs that cooling fluid reduces temperature.
In the course of the work; The operating principle that hydraulic oil is cooled off is following: the oil return of hydraulic system execution unit is pooled in the oil return piece 109; Concentrate from an oil-out of oil return piece 109 and flow out; Flow into the hydraulic oil import 105 on first radiator 102 through pipeline, when the temperature of hydraulic oil import 105 surpasses setting value (for example 80 ℃), make second direction control valve 113 be in electricity condition; Hydraulic oil only needs to be flowed directly in the hydraulic oil container 111 through hydraulic oil outlet 107 through first radiator, 102 cooling backs, can satisfy the needs that hydraulic oil reduces temperature; When the temperature of hydraulic oil import 105 surpasses setting value (for example 80 ℃); Make second direction control valve 113 be in power failure state and launch second water pump 117; Hydraulic oil not only needs the cooling through first radiator 102; Also need get into and flow to again in the hydraulic oil container 111 after cooling off in the 3rd radiator 115, to satisfy the needs that hydraulic oil reduces temperature.
Need to prove; In the foregoing description; Have cooling fluid heat abstractor and hydraulic oil heat abstractor simultaneously in first radiator 102 of cooling system, cooling system is provided with radiator cooler that is used for cooling fluid and the radiator cooler that is used for hydraulic oil simultaneously, but in other embodiments; Can only have the cooling fluid heat abstractor as required and corresponding radiator cooler get final product, perhaps only have the hydraulic oil heat abstractor and accordingly radiator cooler get final product.
Need to prove; In the foregoing description, first direction control valve 108 all adopts two-position two-way solenoid valve with second direction control valve 113, and its input/output port adopts connected mode as shown in the figure; At this only is to explain for example; In other embodiments, can also adopt other connected mode as required, for example two delivery outlets with first direction control valve 108 among Fig. 2 oppositely connect; Perhaps can also use the electromagnetic valve of other types as required, as long as can realize the switching mode of two kinds of paths.
Need to prove; In the foregoing description; Second radiator 110 and the 3rd radiator 115 adopt heat-exchangers of the plate type; And the water circulation heat radiation loop that employing matches with heat-exchangers of the plate type only is to explain for example, can also use the radiator of other types as required, for example air-cooled radiator.
A kind of cooling system that the utility model embodiment provides; Through being that cooling fluid heat abstractor and hydraulic oil heat abstractor in first radiator disposes corresponding radiator cooler; So that as required cooling fluid and hydraulic oil through the cooling of first radiator are cooled off once more; When avoiding first radiator to break down or be under the extreme environment and exceed normal temperature, both improved adaptive capacity to environment, also improved safety redundancy because of the deficiency of dispelling the heat causes hydraulic oil or cooling fluid.
As shown in Figure 3, the control system 200 of the utility model embodiment comprises:
Acquiring unit 201: be used to obtain the temperature of cooling liquid inlet 104 and the temperature of hydraulic oil import 105;
Judging unit 202: the temperature that is used to judge cooling liquid inlet 104 whether greater than the temperature of first setting value and hydraulic oil import 105 whether greater than second setting value;
Performance element 203: when being used for temperature at cooling liquid inlet 104 less than first setting value; Control first direction control valve 108 is in power failure state and first water pump 112 is in halted state; In the temperature of cooling liquid inlet 104 during greater than first setting value, control first direction control valve 108 is in to such an extent that electricity condition and first water pump 112 are in starting state; And when being used for temperature in hydraulic oil import 105 less than second setting value; Control second direction control valve 113 is in to such an extent that electricity condition and second water pump 117 are in halted state; During greater than second setting value, control second direction control valve 113 is in power failure state and second water pump 117 is in starting state in the temperature of hydraulic oil import 105.
In the foregoing description, can first temperature pick up be set at cooling liquid inlet 104, second temperature pick up is set in hydraulic oil import 105, acquiring unit 201 obtains temperature data from first temperature pick up and second temperature pick up.
First setting value and second setting value can artificially be set as required, and for example first setting value is got 95 ℃, and second setting value is got 80 ℃.
Need to prove; The control system 200 of the foregoing description is used for the cooling system of the foregoing description is controlled; Realize freely switching of two kinds of duties, but in other embodiments, the control system also can implement control corresponding according to the cooling system of different embodiment.
Need to prove; One of ordinary skill in the art will appreciate that realize that all or part of unit of above-mentioned control system can be accomplished through the relevant hardware of programmed instruction, aforementioned program can be stored in the computer read/write memory medium; This program realizes function corresponding when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or laser disc.
A kind of control system that the embodiment of the invention provides, the temperature through obtaining cooling liquid inlet in real time and the temperature of hydraulic oil import so that determine whether to launch radiator cooler according to the size of this temperature, have realized freely switching under two kinds of mode of operations.
The utility model embodiment also provides a kind of dual-steel wheel road roller; This dual-steel wheel road roller is provided with above-mentioned cooling system; Can be with the watering water tank on the dual-steel wheel road roller as the water tank 116 described in the above-mentioned cooling system; In addition, can also second radiator 108 and the 3rd radiator 115 of cooling system be arranged in the driver's cabin of dual-steel wheel road roller, to regulate the temperature in the driver's cabin.Because above-mentioned cooling system has above-mentioned technique effect, therefore, the dual-steel wheel road roller that is provided with this cooling system also should possess the corresponding techniques effect, and its practical implementation process is similar to the above embodiments, does not give unnecessary details now.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (12)
1. cooling system comprises being used for first radiator (102) that motor (100) cooling fluid and/or hydraulic oil are cooled off, it is characterized in that:
Said first radiator (102) is provided with cooling liquid inlet (104) and cooling liquid outlet (106); Said cooling system also comprises first direction control valve (108) and second radiator (110), and said cooling liquid outlet (104) optionally directly is communicated in or behind said second radiator (110), is communicated in the coolant circuit in the motor (100) through said first direction control valve (108);
And/or
Said first radiator (102) is provided with hydraulic oil import (105) and hydraulic oil outlet (107); Said cooling system also comprises second direction control valve (113) and the 3rd radiator (115), and said hydraulic oil outlet (107) optionally directly is communicated in or behind said the 3rd radiator (115), is communicated in hydraulic oil container (111) through said second direction control valve (113).
2. cooling system as claimed in claim 1 is characterized in that: said first direction control valve (108), said second direction control valve (113) are two-position three way magnetic valve.
3. cooling system as claimed in claim 1 is characterized in that:
Said second radiator (110), said the 3rd radiator (115) are heat-exchangers of the plate type;
Said radiator system also comprises and is used to the water tank (116) that said second radiator (110) and/or said the 3rd radiator (115) provide the water circulation heat radiation.
4. cooling system as claimed in claim 3 is characterized in that:
Be provided with the first water circulation heat-radiation loop between said water tank (116) and said second radiator (110);
And/or
Be provided with the second water circulation heat-radiation loop between said water tank (116) and said the 3rd radiator (115).
5. cooling system as claimed in claim 4 is characterized in that:
The said first water circulation heat-radiation loop is provided with first water pump (112) and first strainer (114), and said first strainer (114) is located between said first water pump (112) and the said water tank (116);
The said second water circulation heat-radiation loop is provided with second water pump (117) and second strainer (119), and said second strainer (119) is located between said second water pump (117) and the said water tank (116).
6. like each described cooling system of claim 1 to 5, it is characterized in that: said first radiator (1) is provided with cooling fluid heat abstractor and/or hydraulic oil heat abstractor, be used for to said cooling fluid heat abstractor and/or said hydraulic oil heat abstractor blow heat radiation cooling fan (101) and be used for the blow guide housing (103) of guiding of said cooling fan (101).
7. like each described cooling system of claim 1 to 5, it is characterized in that:
Said cooling liquid inlet (104) is communicated in in-engine coolant circuit, and the connecting pipeline between said cooling liquid inlet (104) and the said coolant circuit is provided with thermostat;
Said hydraulic oil import (105) is communicated in the oil-out of the oil return piece (109) of hydraulic system.
8. like each described cooling system of claim 3 to 5, it is characterized in that: said cooling system is arranged on the dual-steel wheel road roller, and said water tank (116) is the watering water tank on the said dual-steel wheel road roller.
9. control system (200) that is applied to each described cooling system of claim 1 to 8 is characterized in that said control system (200) comprising:
Acquiring unit (201) is used to obtain the temperature of cooling liquid inlet (104) and/or is used to obtain the temperature of hydraulic oil import (105);
Judging unit (202), the temperature that is used to judge cooling liquid inlet (104) whether greater than first setting value and/or the temperature that is used to judge hydraulic oil import (105) whether greater than second setting value;
Performance element (203); When being used for temperature at cooling liquid inlet (104) less than first setting value; Control first direction control valve (108) works in and makes cooling liquid outlet (106) directly be communicated in the state of the coolant circuit in the motor (100); During greater than first setting value, control first direction control valve (108) works in and makes cooling liquid outlet (104) behind said second radiator (110), be communicated in the state of the coolant circuit in the motor (100) in the temperature of cooling liquid inlet (104); And/or when being used for temperature in hydraulic oil import (105) less than second setting value; Control second direction control valve (113) works in and makes hydraulic oil outlet (107) directly be communicated in the state of hydraulic oil container (111); During greater than second setting value, control second direction control valve (113) works in and makes hydraulic oil outlet (107) behind said the 3rd radiator (115), be communicated in the state of hydraulic oil container (111) in the temperature of hydraulic oil import (105).
10. control as claimed in claim 9 system; It is characterized in that: said cooling liquid inlet (104) locates to be provided with first temperature pick up; Said hydraulic oil import (105) locates to be provided with second temperature pick up, and said acquiring unit (201) obtains temperature data from said first temperature pick up or said second temperature pick up.
11. a dual-steel wheel road roller is characterized in that: said dual-steel wheel road roller is provided with each described cooling system of claim 1 to 8.
12. dual-steel wheel road roller as claimed in claim 11 is characterized in that: said second radiator (108), said the 3rd radiator (115) are arranged in the driver's cabin of said dual-steel wheel road roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204301029U CN202369895U (en) | 2011-11-03 | 2011-11-03 | Radiator system, control system and double-steel-wheel road roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204301029U CN202369895U (en) | 2011-11-03 | 2011-11-03 | Radiator system, control system and double-steel-wheel road roller |
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| Publication Number | Publication Date |
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| CN202369895U true CN202369895U (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204301029U Expired - Fee Related CN202369895U (en) | 2011-11-03 | 2011-11-03 | Radiator system, control system and double-steel-wheel road roller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016127A (en) * | 2012-08-18 | 2013-04-03 | 安徽合叉叉车有限公司 | Forklift cooling system dedicated for stone |
| CN103089758A (en) * | 2013-01-30 | 2013-05-08 | 三一重机有限公司 | Engineering machine and hydraulic oil cooling system thereof |
| CN110177446A (en) * | 2019-05-28 | 2019-08-27 | 珠海格力电器股份有限公司 | Radiator control method, frequency converter assembly, household electrical appliance and computer readable storage medium |
| CN116906389A (en) * | 2023-09-11 | 2023-10-20 | 甘肃送变电工程有限公司 | Hydraulic oil temperature control system and control method |
-
2011
- 2011-11-03 CN CN2011204301029U patent/CN202369895U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016127A (en) * | 2012-08-18 | 2013-04-03 | 安徽合叉叉车有限公司 | Forklift cooling system dedicated for stone |
| CN103089758A (en) * | 2013-01-30 | 2013-05-08 | 三一重机有限公司 | Engineering machine and hydraulic oil cooling system thereof |
| CN110177446A (en) * | 2019-05-28 | 2019-08-27 | 珠海格力电器股份有限公司 | Radiator control method, frequency converter assembly, household electrical appliance and computer readable storage medium |
| CN110177446B (en) * | 2019-05-28 | 2020-08-25 | 珠海格力电器股份有限公司 | Radiator control method, frequency converter assembly, household appliance and computer readable storage medium |
| CN116906389A (en) * | 2023-09-11 | 2023-10-20 | 甘肃送变电工程有限公司 | Hydraulic oil temperature control system and control method |
| CN116906389B (en) * | 2023-09-11 | 2023-11-14 | 甘肃送变电工程有限公司 | Hydraulic oil temperature control system and control method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20151103 |
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| EXPY | Termination of patent right or utility model |