CN1177713C - Freezing car - Google Patents
Freezing car Download PDFInfo
- Publication number
- CN1177713C CN1177713C CNB021181322A CN02118132A CN1177713C CN 1177713 C CN1177713 C CN 1177713C CN B021181322 A CNB021181322 A CN B021181322A CN 02118132 A CN02118132 A CN 02118132A CN 1177713 C CN1177713 C CN 1177713C
- Authority
- CN
- China
- Prior art keywords
- temperature
- frequency
- output
- converter plant
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/20—Refrigerated goods vehicles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/003—Transport containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/14—Trucks; Load vehicles, Busses
Abstract
The invention provides a refrigerating car, for restraining an abnormal temperature rise, due to increase in the output of a generator and which is capable of preventing an abnormality or a trouble, such as disconnections or the like. The refrigerating car, in which a generator (4) is driven by an engine (3) and the output of the generator (4) is converted into AC by an inverter device (14) for driving a compressor (16) through variable speed driving by the output of the inverter device (14), is provided with a temperature-detecting means (24) for detecting the temperature of the generator and frequency control means (25, 26) for limiting the output frequency (f) of the inverter device (14) so as to be low, when the detection temperature, detected by the temperature detecting means (24), has exceeded a set value (Ts).
Description
Technical field
The present invention relates to use converter plant will become frequency-changing AC electricity, variable speed drive to form the van cooler of the compressor of refrigerating cycle by the output transform of engine-driven generator.
Background technology
In this class van cooler in the past, adopt belt pulley to be connected the output shaft of driving engine and the axle drive shaft of compressor with belt, come Driven Compressor according to the rotation of driving engine.The compressor of axle drive shaft evagination is called open compressor, and the shortcoming that this compressor exists is: even adopt oil sealing to wait sealing drive shaft, though the refrigerant in the refrigerating cycle is a hoot, still can be leaked in the air at leisure.In order to address this problem, as opening in the 2001-56170 communique the Japanese Patent spy, having disclosed by belt pulley and belt makes the output shaft of driving engine be connected with the S. A. of electrical generator, by converter plant the output transform of driving engine is become alternating current, the van cooler of variable speed drive hermetic type compressor.
The electrical generator that is used for this van cooler is an ac generator.As everyone knows, because the rotating speed of driving engine changes with the operative condition of automobile,, thus, control the output voltage of electrical generator comparatively consistently so be provided with the automatic voltage regulator (AVR) of the electric current of adjusting excitation coil.The output of electrical generator is transformed into direct current (DC) by rectifier, is transformed into the frequency-changing AC electricity by converting means again, and then supplies with drive motor for compressor.
On the other hand, the difference with storehouse temperature is depended in chilled load in the van cooler and refrigeration load.Therefore, in above-mentioned van cooler, the variable speed drive (VSD) that compressor rotary speed is changed.In general, chilled load and refrigeration load on ambient-air temperature high midsummer for bigger, are less in ambient-air temperature low winter.Therefore, it is high more that ambient-air temperature becomes, and just needs to improve the rotating speed of compressor more.Because the consumed power of compressor roughly is directly proportional with rotating speed, the place when ambient-air temperature is high, must increase flow to excitation coil electric current to improve the output of electrical generator.
As mentioned above, when improving generated output along with the increase of load, the cal val of electrical generator also increases, and the result is that the temperature of electrical generator rises.In addition, it is in ambient-air temperature high period that the horsepower output of electrical generator need increase, so electrical generator reduces to the heat dissipation capacity of atmosphere, utilizes the effect of atmosphere cooling also little.Its result, the temperature of electrical generator extremely rises, and exists abnormal condition or faults such as easy generation coil breakage.
Summary of the invention
The present invention is used to solve the problems of the technologies described above, and its technical matters to be solved provides the van cooler of abnormal condition such as can suppressing to result from overheating that generated output power increases and prevention broken string or fault generation.
The van cooler of the 1st invention of the present invention contains the converter plant that is become the frequency-changing AC electricity by engine-driven generator with the output transform with this electrical generator, and the compressor of the output variable-ratio refrigerating cycle by this converter plant comprises
Detect described generator-temperature detection temperature-detecting device and
When the temperature that is detected by described temperature-detecting device surpasses setting value, the output frequency of described converter plant is limited in the frequency control apparatus of low value.
The van cooler of the 2nd invention of the present invention is in the 1st invention van cooler,
When described frequency control apparatus surpasses setting value in the temperature that is detected by described temperature-detecting device, the output frequency of described converter plant is remained on specified value.
The van cooler of the 3rd invention of the present invention is in the van cooler of the 1st invention,
When described frequency control apparatus surpassed setting value in the temperature that is detected by described temperature-detecting device, every process specified time made the output frequency of described converter plant only reduce the frequency of regulation.
The van cooler of the 4th invention of the present invention is in the van cooler of the 1st to the 3rd each invention,
When described frequency control apparatus surpassed than high the 2nd setting value of described setting value in the temperature that is detected by described temperature-detecting device, the output frequency that makes described converter plant was zero, so that make described compressor stall.
Description of drawings
Fig. 1 represents the indignant slightly constructional drawing of an example of van cooler of the present invention.
Fig. 2 is illustrated in the diagram of block of the unit construction system of the control setup of control refrigerating cycle in the example shown in Figure 1.
Fig. 3 represents to be used for to illustrate the instruction diagram of the summary action of output frequency determination device shown in Figure 2.
The diagram of circuit of the processing sequence when Fig. 4 represents that microcomputer etc. contains the function of Fig. 3 explanation.
Fig. 5 represents to be used for to illustrate the instruction diagram of other summary action of frequency determination device shown in Figure 2.
The diagram of circuit of the processing sequence when Fig. 6 represents that microcomputer etc. contains the function of Fig. 5 explanation.
Nomenclature
1. headstock
2. railway carriage
3. driving engine
4. electrical generator
5. freezing and refrigeration chamber
12 rectifiers
14 converter plants
15 drive motor for compressor
16 compressors
17 condensers
19 evaporators
21 storehouse temperature sensors
22 temperature setting devices
23 target frequency determination devices
24 generator-temperature detection sensors
25 temperature province detecting devices
26 output frequency determination devices
Concrete example
To describe the present invention in detail according to graphic desirable example below.Fig. 1 represents the summary construction diagram of an example relevant with the present invention.This van cooler is connecting railway carriage 2 on headstock 1.Adorning driving engine 3 at the outer bottom of the driver's seat (omitting among the figure) of headstock 1 with electrical generator 4, connecting the S. A. of electrical generator on the output shaft of this driving engine 3.And, be provided with the operating portion 5 that can carry out the temperature setting at least in the front of driver's seat.The generator-temperature detection sensor 24 that is used to detect electrical generator 4 temperature is housed in addition.At the position, front of railway carriage 2 is freezing, the reefer 6 of cold chamber and reefer adjacency, and the rear portion is general car chamber 7.
In addition, in the exterior bottom of railway carriage 2 power supply box 8 of placing automatic voltage regulator (AVR), rectifier, converter plant and control circuit etc. is housed, compressor 16 is equipped with in its front portion.In addition, the condenser 17 that constitutes refrigerating circulation system is housed, evaporator 19 is housed at top freezing, reefer 6 in the front upper place, the outside of railway carriage 2.Be provided with in addition and be used to detect storehouse temperature sensors 21 freezing, reefer 6 temperature.
Fig. 2 is illustrated in the diagram of block of the unit construction system of the control setup of control refrigerating cycle in the example shown in Figure 1.Among the figure, the numbering of each several part is identical with Fig. 1.In this system diagram, when key switch 9 being carried out the ON operation, driving engine 3 just starts.This driving engine 3 is connected with above-mentioned electrical generator 4.For the output voltage with electrical generator 4 is controlled at steady state, be provided with the automatic voltage regulator (AVR) 10 of its exciting current of control.Mouth at electrical generator 4 is connecting rectifier 12 by switch 11, gives filtering from the pulse current of these rectifier 12 outputs by filter capacitor 13, is applied to the dc output end of converter plant 14.
On the other hand, storehouse temperature sensor 21 and be arranged on operating portion 5 is set temperature setting devices 22 freezing, reefer 6 temperature and is connected with target frequency determination device 23.Target frequency determination device 23 comes computing to supply with the frequency of the electric power of drive motor for compressor 15 according to the difference between the design temperature of temperature that is detected by storehouse temperature sensor 21 and temperature setting device 22.The temperature of 24 pairs of electrical generators 4 of generator-temperature detection sensor detects, and is connected with temperature province detecting device 25.Whether the temperature that this temperature province detecting device 25 detects electrical generators is exported at least in the range of temperatures of regulation or is lower than range of temperatures or is higher than three kinds of signals of range of temperatures in the range of temperatures of regulation.Output frequency determination device 26 is revised from the target frequency of target frequency determination device 23 output according to the output signal of temperature province detecting device 25, is applied on the converter plant control circuit 27 as the output frequency of converter plant.This converter plant control circuit 27 produces the ON/OFF signal that is used to generate three-phase pulse width modulated (PWM) voltage according to the converter plant output frequency, constitutes the on-off element of converter plant 14 with control.
In addition, temperature province detecting device 25 is corresponding with frequency control apparatus of the present invention with output frequency determination device 26.
Know no longer explanation about the structure of the whole device 10 of automatic voltage joint shown in Figure 2, converter plant 14, converter plant control circuit and the work of action and refrigerating circulation system because of many institutes.The inhibition of the overheating that the electrical generator that just results from below output increases is illustrated.At first, key switch 9 is carried out ON operation, along with the startup of driving engine 3, electrical generator 4 begins generating, simultaneously by automatic voltage regulator (AVR) 10 pressure-controlled of generating electricity.For this reason, when switch 11 being carried out the ON operation, will carry out rectification from the alternating current of electrical generator 4 outputs by rectifier 12, it is after-applied to converter plant 14 to carry out filtering by filter capacitor 13.
On the other hand, will be added on the target frequency determination device 23 by the storehouse temperature Ta of storehouse temperature sensor 21 detections and the setting value Ts of temperature setting device 2.Target frequency determination device 23 is according to its temperature difference Ta-Ts, and corresponding target frequency Fs also exports between frequency limit A～C that decision is predesignated.Temperature province detecting device 25 will detect the generator-temperature detection Tg that is detected by generator-temperature detection sensor 24 and be in the range of temperatures T1, the T2 that predesignate, T3 (in which scope among T1＞T2＞T3), testing result to be added on the output frequency determination device 6.Output frequency determination device 26 will directly be exported by the target frequency Fs of target frequency determination device 23 decisions according to the testing result of temperature province detecting device 25, or is revised back output, or output halt instruction (OH
z).
Fig. 3 represents to be used for to illustrate the instruction diagram of the summary action of output frequency determination device 26.Wherein, setting T1 (140 ℃), T2 (120 ℃), three temperature of T3 (110 ℃), when generator-temperature detection Tg becomes rising trend from being lower than the T2 state, the scope that will be lower than T2 is as " unrestrictedly " scope of directly exporting by the target frequency Fs of target frequency determination device 23 decisions, remain on " frequency limitation " scope of constant frequency such as 40Hz as scope, the scope of " stopping " when surpassing T1 with T2-T1.In case after surpassing T2, the scope of T3-T1 as " frequency limitation " scope, will be lower than scope conduct " unrestrictedly " scope of T3 at generator-temperature detection Tg.Like this, the lower limit that makes " frequency limitation " scope when temperature rises and later on different reason is to make frequency have the cause of hysteresis behaviour for preventing to fluctuate.
As seen from the above description, when electrical generator started back its temperature T g above setting value T2, the output frequency of converter plant 14 was limited in certain value.When temperature T g surpass T1 just stop thereafter.As drop to T3 when following target frequency Fs turn round.The limits value 40Hz of " frequency limitation " scope then will bring into play required ton of refrigeration if remain on this value, and for being no more than the temperature that T1 (140 ℃) selectes electrical generator 4.
About target frequency determination device 23 shown in Figure 2, temperature province detecting device 25, output frequency determination device 26 etc., can make simple digital signal processors such as microcomputer possess these functions.Fig. 4 is the diagram of circuit of the concrete processing sequence of this occasion of expression.Among the figure, will decide converter plant 14 exportable target frequency Gs according to the difference of storehouse temperature ta and design temperature Ts in the step 101.Then, judge in step 102 whether driving engine 3 is in the running.If in running condition is then carried out the ON operation of switch by frequency 103, meanwhile, automatic voltage regulator (AVR) 10 beginning voltage control actions.In next step 104, judge that electrical generator 4 has no-output.Having under the condition of output, reading the temperature T g that detects by generator-temperature detection sensor 24, and then judging by step 105 whether generator-temperature detection Tg surpasses setting value T1 by step 105.Be judged to be driving engine 3 in step 102 and do not turn round, or step 106 is judged to be generator-temperature detection Tg when having surpassed setting value T1, give to stop by step 115.Be about to the output frequency vanishing of converter plant.When being judged to be the electrical generator no-output, repeat to handle by step 101～104 by step 104.
If generator-temperature detection Tg be judged as when being lower than setting value T1, by step 107 judge whether generator-temperature detection Tg surpassed setting value T3 thereafter.When surpassing, judge the sign (flag) that whether has expression to be in " frequency limitation " scope by step 108.If sign is arranged, then judge by step 109 whether generator-temperature detection Tg has surpassed setting value T2.When surpassing, be illustrated in the sign of " frequency limitation " scope by step 110 setting.
And, when being judged to be sign by step 108, and when sign is set by step 110, judge by step 111 whether existing target frequency Fs is lower than limit frequency f1 (40Hz), if target frequency Fs is not less than limit frequency f1, then converter plant output frequency f is decided to be limit frequency f1, controls converter plant 14 by step 114 according to converter plant output frequency f then by step 113.
Adopting processing sequence shown in Figure 4, is can the temperature rise with the electrical generator of Fig. 3 explanation be suppressed to control.
In addition, the control with Fig. 3 and Fig. 4 explanation is lower than setting value T1 at generator-temperature detection Tg, and when surpassing the scope of T2 or T3, and the output frequency of converter plant 14 is remained on certain value.But under the another kind of situation, as shown in Figure 5, every process certain hour is as 3 minutes, if make converter plant output frequency f reduce 5Hz, then can in zone, turn round all the time, therefore can prevent to surpass the generation of this state of affairs of desired temperature T1 reliably near low temperature setting value T3.
Fig. 6 is the diagram of circuit that is used for realizing with the concrete processing sequence of digital signal processors such as microcomputer of the control of Fig. 5 explanation.Among the figure, the processing of step 201～207 and step 101 shown in Figure 4～107 are identical, so repeat no more.In the step 208 after step 207 is handled, whether at work to judge the time in the scope of hanging down clocks in frequency timer.If be judged as timer not at work, then judge by step 209 whether generator-temperature detection Tg has surpassed setting value T2.When surpassing, timer T is started by step 212., in step 213, make converter plant output frequency f reduce specified value Δ f such as 5Hz thereafter, and then by step 214 by the converter plant output frequency f that the has reduced converter plant 14 that turns round.
On the other hand, when being judged to be timer T in running condition by step 208, judge by step 210 whether the timing time of timer has surpassed setting value Ts.In the moment that surpasses, making timer T reset to transfer to step 212 by step 21 is that timer starts processing.Do not reach setting-up time Ts if be judged to be the timing time of timer by step 210, then judge that by step 215 the output frequency f of converter plant is whether more than target frequency Fs.When target frequency Fs is above, enter the processing of step 217.Otherwise, when converter plant output frequency f is lower than target frequency Fs, with regard to the processing of execution in step 214.
Then, be judged to be generator-temperature detection Tg by step 209 when surpassing setting value T2, judging that by step 216 converter plant output frequency f is whether more than target frequency Fs.As when target frequency Fs is above, make converter plant output frequency f become target frequency fs by step 217 running converter plant, reset and enter the processing of step 214 by step 218 couple timer T.In addition, when the output frequency f that is judged to be converter plant by step 216 is lower than target frequency Fs, converter plant output frequency f is increased specified value Δ f such as 5Hz, and transfer to the processing of step 214 by step 219.By the processing of step 219, can improve the ton of refrigeration after electrical generator starts, to reach temperature required rapidly.Moreover, when being judged to be driving engine 3 by step 202, or be judged to be generator-temperature detection Tg when having surpassed setting value T1 by step 206 in running, then make the converter plant output frequency become OHz, so that converter plant quits work by step 220.
Use processing sequence shown in Figure 6, as Fig. 5 explanation,, can prevent to surpass the generation of this state of affairs of desired temperature T1 reliably owing to can in zone, remain in operation near low temperature setting value T3.
Like this, as Fig. 3 and Fig. 4 explanation, in the set point of temperature scope of electrical generator 4, even f remains on certain value with the converter plant operating frequency, or below it, perhaps as Fig. 5 and Fig. 6 explanation, in the range of temperatures of the regulation of electrical generator 4, along with effluxion reduces the converter plant operating frequency one by one, also can suppress to result from the abnormal ascending of the temperature that electrical generator output increases.
Be clear that from above-mentioned explanation, adopt the present invention, then can provide a kind of van cooler, this van cooler can suppress to result from the abnormal ascending of the temperature that electrical generator output increases, and prevents abnormal condition or fault generations such as broken string.
Claims (4)
1. a van cooler contains the converter plant that is become the frequency-changing AC electricity by engine-driven generator with the output transform with this electrical generator, and the compressor of the output variable-ratio refrigerating cycle by this converter plant is characterized in that, comprises
Detect described generator-temperature detection temperature-detecting device and
When the temperature that is detected by described temperature-detecting device surpasses setting value, the output frequency of described converter plant is limited in the frequency control apparatus of low value.
2. van cooler as claimed in claim 1 is characterized in that,
When described frequency control apparatus surpasses setting value in the temperature that is detected by described temperature-detecting device, the output frequency of described converter plant is remained on specified value.
3. van cooler as claimed in claim 1 is characterized in that,
When described frequency control apparatus surpassed setting value in the temperature that is detected by described temperature-detecting device, every process specified time made the output frequency of described converter plant only reduce the frequency of regulation.
4. as each described van cooler of claim 1 to 3, it is characterized in that,
When described frequency control apparatus surpassed than high the 2nd setting value of described setting value in the temperature that is detected by described temperature-detecting device, the output frequency that makes described converter plant was zero, so that make described compressor stall.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP122682/01 | 2001-04-20 | ||
| JP2001122682A JP2002318026A (en) | 2001-04-20 | 2001-04-20 | Refrigerating car |
| JP122682/2001 | 2001-04-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1382603A CN1382603A (en) | 2002-12-04 |
| CN1177713C true CN1177713C (en) | 2004-12-01 |
Family
ID=18972355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021181322A Expired - Fee Related CN1177713C (en) | 2001-04-20 | 2002-04-19 | Freezing car |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2002318026A (en) |
| KR (1) | KR20020082130A (en) |
| CN (1) | CN1177713C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101681177B (en) * | 2007-06-07 | 2013-03-06 | 开利公司 | Transport refrigeration unit auxiliary power |
| WO2011033779A1 (en) * | 2009-09-16 | 2011-03-24 | ダイキン工業株式会社 | Refrigeration system for container |
| WO2014055524A1 (en) * | 2012-10-01 | 2014-04-10 | Thermo King Corporation | Methods and systems to detect an operation condition of a compressor |
| CN105667255B (en) * | 2015-12-25 | 2018-04-17 | 广州科技职业技术学院 | A kind of new energy cold chain car refrigeration control system |
| CN109386998B (en) * | 2017-08-04 | 2020-12-01 | 奥克斯空调股份有限公司 | Protection control method for variable frequency air conditioner |
| CN110700939A (en) * | 2019-10-24 | 2020-01-17 | 梁思迪 | Special generator for full-automatic throttle control refrigerated container refrigerator |
-
2001
- 2001-04-20 JP JP2001122682A patent/JP2002318026A/en active Pending
-
2002
- 2002-04-19 KR KR1020020021514A patent/KR20020082130A/en not_active Application Discontinuation
- 2002-04-19 CN CNB021181322A patent/CN1177713C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020082130A (en) | 2002-10-30 |
| CN1382603A (en) | 2002-12-04 |
| JP2002318026A (en) | 2002-10-31 |
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Granted publication date: 20041201 Termination date: 20120419 |