CN114987150A - Automatic switching system for road and standby power of refrigerating unit of refrigerator car - Google Patents
Automatic switching system for road and standby power of refrigerating unit of refrigerator car Download PDFInfo
- Publication number
- CN114987150A CN114987150A CN202210717822.6A CN202210717822A CN114987150A CN 114987150 A CN114987150 A CN 114987150A CN 202210717822 A CN202210717822 A CN 202210717822A CN 114987150 A CN114987150 A CN 114987150A
- Authority
- CN
- China
- Prior art keywords
- standby
- subunit
- power
- magnetic latching
- control unit
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 10
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Transportation (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention provides a road and standby power automatic switching system for a refrigerating unit of a refrigerator car, which comprises a refrigerating unit control unit, an alternating current contactor, a magnetic latching relay and a variable frequency electric control unit, wherein the refrigerating unit control unit is connected with the alternating current contactor; the magnetic latching relay can still keep the original state even if sudden temporary power failure occurs and the system is shut down by utilizing the characteristic of the magnetic latching relay, and after the power is switched on, the state of the system before power failure can be judged through the state of the magnetic latching relay, so that corresponding operation is carried out, power failure reconnection is realized, and the refrigerating unit can be prevented from being started due to power failure reconnection.
Description
Technical Field
The invention relates to the field of refrigeration control of refrigerated vehicles, in particular to an automatic switching system for road and standby power of a refrigerating unit of a refrigerated vehicle.
Background
The refrigerator car is a closed van-type transport vehicle for transporting frozen or fresh-keeping goods, is a special transport vehicle provided with a refrigerating unit, and is commonly used for transporting frozen foods, dairy products, vegetables, fruits, vaccines, medicines and the like.
In long-distance transportation, when a driver has a rest halfway or stops to unload goods, the working mode of the unit is switched from a road mode to a standby power mode, namely the power source of the refrigerating unit is switched from engine driving to external commercial power driving.
In recent years, with the development of new energy, the dependence on traditional thermal power is gradually shrinking, the power supply is undergoing a modification process, especially industrial power, the situation of accidental temporary interruption of mains supply can occur due to various reasons in the modification process, especially the situation of tripping and power failure for several minutes easily occurs in summer with high peak of power utilization, but the conventional refrigerating units are started manually, once the temporary power failure occurs, the refrigerating units cannot automatically operate after being connected with the power, so that the continuous operation cannot be realized, and the situation is often generated in the process that a driver is not on site or has a rest at night, so that the damage to transported goods is caused due to the fact that the units are stopped and the temperature in a compartment cannot be controlled.
At present, in order to solve the problem, a mode of triggering an alarm is mainly adopted to prompt a driver, but the mode excessively depends on personal habits and personal abilities of the driver, and is very easy to fail.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an automatic switching system for a refrigerating unit road and a standby power of a refrigerator car, which can automatically start when power failure reconnection is carried out in a standby power mode and can realize automatic switching between the road mode and the standby power mode.
In order to achieve the purpose, the invention adopts the technical scheme that: a refrigerating unit road and standby power automatic switching system of a refrigerator car comprises a refrigerating unit control unit, an alternating current contactor, a magnetic latching relay and a variable frequency electric control unit;
the refrigerating unit control unit comprises a standby electric detection subunit, a standby electric control subunit, a standby electric feedback subunit and a road control subunit;
the standby power detection subunit is used for detecting whether the commercial power is accessed;
the standby control subunit is respectively connected with a first relay coil of the magnetic latching relay and a relay coil of the alternating current contactor, the input end of the alternating current contactor is connected with a mains supply access end, and the output end of the alternating current contactor is connected with the variable frequency electric control unit;
the standby electronic feedback subunit is connected to an input contact of a magnetic latching relay, and two output contacts of the magnetic latching relay are respectively grounded and unconnected;
the circuit-use control subunit is connected to a second relay coil of the magnetic latching relay;
under the standby power mode, the standby power detection subunit detects the commercial power access state, and the refrigerating unit control unit respectively controls the suction of the alternating current contactor and the conduction of the grounding circuit of the magnetic latching relay through the standby power control subunit;
when the power is switched on after being temporarily interrupted, the refrigerating unit control unit acquires the state of the standby electric feedback subunit, namely the grounding circuit of the standby electric feedback subunit is in a conducting state, judges that the power is interrupted, controls the relay coil of the alternating current contactor to work through the standby electric control subunit, and attracts, switches on and powers on the alternating current contactor;
when the artificial power failure occurs and the road-use mode is started, the road-use control subunit triggers the second relay of the magnetic latching relay to work, the grounding circuit of the magnetic latching relay is disconnected, namely the grounding circuit of the standby electric feedback subunit is disconnected, the refrigerating unit control unit judges that the mode switching occurs, and the standby electric mode is suspended.
Basically, in the road-used mode, the road-used control subunit is in a conducting state, the connection circuit of the standby electric feedback subunit is kept disconnected, the standby electric power supply is connected, and the refrigerating unit control unit cannot control the ac contactor to be connected in an attraction mode.
Basically, the output end of the variable frequency electric control unit is connected with the electric compressor.
Basically, the standby power detection unit comprises a power converter connected to the standby power input line.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly, the invention utilizes the characteristics of the magnetic latching relay to design the standby power feedback circuit, utilizes one path of grounding conduction of the magnetic latching relay as the judgment basis for starting the standby power mode, under the standby power mode, if power failure reconnection occurs, firstly, whether the standby power feedback circuit is in the standby power mode is obtained, if the judgment is yes, the standby power control subunit controls the AC contactor to pull in, so that the system is automatically started, and if the judgment is not, the standby power supply is not started even if the standby power supply is conducted.
Drawings
Fig. 1 is a schematic circuit diagram of an automatic switching system for the circuit and the standby power of a refrigerator car refrigerating unit of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 1, the description will be made by taking the single backup power supply AC220V and the low voltage power supply DC12V as an example in combination with a schematic diagram:
the standby power detection subunit comprises a power converter connected to the standby power input circuit and used for detecting whether the mains supply is connected.
It connects magnetic latching relay's first relay coil k2 and AC contactor's relay coil k1 respectively to be equipped with the electric control subunit, the commercial power incoming end is connected to AC contactor's input, AC contactor's output is connected to frequency conversion electric control unit, electric compressor is connected to frequency conversion electric control unit's output.
The standby electric feedback subunit is connected to an input contact of a magnetic latching relay, and two output contacts of the magnetic latching relay are respectively grounded and unconnected.
The road control subunit is connected to the second relay coil k3 of the magnetic latching relay.
Description of the working principle:
in a standby power mode:
the standby power detection subunit detects the access of the AC220V commercial power, and the refrigerating unit control unit respectively controls the attraction of the AC contactor and the conduction of the grounding line GND of the magnetic latching relay through the standby power control subunit, and records the working state of the standby power mode.
When the standby power supply AC220V is powered off accidentally, the standby power supply AC220V is reconnected automatically and recovered, the refrigerating unit control unit acquires the state of the standby power feedback subunit, namely the grounding line GND of the standby power feedback subunit is in a conducting state, the refrigerating unit control unit judges that power interruption occurs, the standby power control subunit controls the relay coil k1 of the alternating current contactor to work, the alternating current contactor is powered on in an attracting mode, and the refrigerating unit continues to work according to the working condition before the power failure.
When the standby power supply AC220V is powered off and the driver starts the road-use mode, the road-use control subunit triggers the second relay k3 of the magnetic latching relay to work, the grounding circuit of the magnetic latching relay is disconnected, namely the grounding circuit of the standby electric feedback subunit is disconnected, the refrigerating unit control unit judges that mode switching occurs, the standby power mode is suspended, and in the state, the power supply of the refrigerating unit is provided by the engine.
In the road mode, even if the commercial power is connected, the standby power mode still cannot be started, and manual starting is needed.
In addition, after a driver arrives at a certain place, the commercial power supply is reconnected, and due to the characteristic of the magnetic latching relay, the refrigerating unit control unit still cannot automatically start the unit, the refrigerating unit can normally work by manually starting the unit by the driver and resetting or switching the contact of the magnetic latching device.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (4)
1. The utility model provides a refrigerator car refrigerating unit way is used and is equipped with electric automatic switching system which characterized in that: the system comprises a refrigerating unit control unit, an alternating current contactor, a magnetic latching relay and a variable frequency electric control unit;
the refrigerating unit control unit comprises a standby electric detection subunit, a standby electric control subunit, a standby electric feedback subunit and a road control subunit;
the standby power detection subunit is used for detecting whether the commercial power is accessed;
the standby control subunit is respectively connected with a first relay coil of the magnetic latching relay and a relay coil of the alternating current contactor, the input end of the alternating current contactor is connected with a mains supply access end, and the output end of the alternating current contactor is connected with the variable frequency electric control unit;
the standby electronic feedback subunit is connected to an input contact of a magnetic latching relay, and two output contacts of the magnetic latching relay are respectively grounded and unconnected;
the circuit-use control subunit is connected to a second relay coil of the magnetic latching relay;
under the standby power mode, the standby power detection subunit detects the commercial power access state, and the refrigerating unit control unit respectively controls the suction of the alternating current contactor and the conduction of the grounding circuit of the magnetic latching relay through the standby power control subunit;
when the power is switched on after being temporarily interrupted, the refrigerating unit control unit acquires the state of the standby electric feedback subunit, namely the grounding circuit of the standby electric feedback subunit is in a conducting state, judges that the power is interrupted, controls the relay coil of the alternating current contactor to work through the standby electric control subunit, and attracts, switches on and powers on the alternating current contactor;
when the artificial power failure occurs and the road-use mode is started, the road-use control subunit triggers the second relay of the magnetic latching relay to work, the grounding circuit of the magnetic latching relay is disconnected, namely the grounding circuit of the standby electric feedback subunit is disconnected, the refrigerating unit control unit judges that the mode switching occurs, and the standby electric mode is suspended.
2. A refrigerator car chiller unit on-board and standby power automatic switching system as claimed in claim 1 wherein: in the road-use mode, the road-use control subunit is in a conducting state, the electric connection circuit of the standby electric feedback subunit is kept disconnected, the standby electric power supply is connected, and the refrigerating unit control unit does not control the AC contactor to be connected in an attraction mode.
3. A refrigerator car refrigeration unit on-board and standby-power automatic switching system as claimed in claim 1 or 2, wherein: and the output end of the variable-frequency electric control unit is connected with the electric compressor.
4. A refrigerator car refrigeration unit on-board and standby-power automatic switching system as claimed in claim 1 or 2, wherein: the standby power detection unit comprises a power converter connected to the standby power input circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210717822.6A CN114987150B (en) | 2022-06-23 | 2022-06-23 | Automatic switching system for refrigerating unit circuit and standby power of refrigerator car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210717822.6A CN114987150B (en) | 2022-06-23 | 2022-06-23 | Automatic switching system for refrigerating unit circuit and standby power of refrigerator car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114987150A true CN114987150A (en) | 2022-09-02 |
| CN114987150B CN114987150B (en) | 2024-07-19 |
Family
ID=83036685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210717822.6A Active CN114987150B (en) | 2022-06-23 | 2022-06-23 | Automatic switching system for refrigerating unit circuit and standby power of refrigerator car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114987150B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220931A (en) * | 1999-02-01 | 2000-08-08 | Sharp Corp | Freezing/refrigerating system for vehicle |
| JP2015031410A (en) * | 2013-07-31 | 2015-02-16 | 日野自動車株式会社 | Cooling system for vehicle |
| CN209381738U (en) * | 2018-09-18 | 2019-09-13 | 广州万宝集团有限公司 | A kind of driving device for refrigerating machine of refrigerated truck group |
| CN112455191A (en) * | 2019-09-09 | 2021-03-09 | 冷王公司 | Transport climate control system with accessory power distribution unit for managing transport climate control loads |
| CN113991826A (en) * | 2021-10-08 | 2022-01-28 | 珠海格力电器股份有限公司 | Power supply control system and method for refrigerating unit of refrigerator car and refrigerator car |
-
2022
- 2022-06-23 CN CN202210717822.6A patent/CN114987150B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220931A (en) * | 1999-02-01 | 2000-08-08 | Sharp Corp | Freezing/refrigerating system for vehicle |
| JP2015031410A (en) * | 2013-07-31 | 2015-02-16 | 日野自動車株式会社 | Cooling system for vehicle |
| CN209381738U (en) * | 2018-09-18 | 2019-09-13 | 广州万宝集团有限公司 | A kind of driving device for refrigerating machine of refrigerated truck group |
| CN112455191A (en) * | 2019-09-09 | 2021-03-09 | 冷王公司 | Transport climate control system with accessory power distribution unit for managing transport climate control loads |
| CN113991826A (en) * | 2021-10-08 | 2022-01-28 | 珠海格力电器股份有限公司 | Power supply control system and method for refrigerating unit of refrigerator car and refrigerator car |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114987150B (en) | 2024-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2012009954A1 (en) | Dc-powered mobile refrigeration unit | |
| JP2019525113A (en) | System and method for controlling the speed of compressor, evaporator fan, and condenser fan in battery mode of a cooling system for a vehicle container | |
| EP3734189A1 (en) | Systems and methods of powering a refrigeration unit of a hybrid vehicle | |
| KR102162926B1 (en) | Cooling system for refrigerated vehicle | |
| CN109520204B (en) | Control system and method for electric refrigerator car with CAN (controller area network) function refrigeration air conditioner | |
| CN203964519U (en) | Refrigerator bimodulus switching device shifter | |
| CN114987150A (en) | Automatic switching system for road and standby power of refrigerating unit of refrigerator car | |
| CN209279493U (en) | The control system of electronic refrigerator car refrigeration air-conditioner | |
| CN112810401B (en) | Control method of cold machine control system for new energy automobile | |
| CN104659903A (en) | Automatic switching device for double-acting power supply and control method | |
| CN216231688U (en) | Power supply control system of refrigerator car refrigerating unit and refrigerator car | |
| CN109520203B (en) | Control system and control method for refrigeration air conditioner of electric refrigerator car | |
| CN105805995B (en) | More refrigerators share condensation unit autonomous control system | |
| CN106655473B (en) | Electrical control system and method suitable for air conditioner of refrigerator car | |
| CN204442002U (en) | A kind of double dynamical power supply automatic converting device | |
| CN2192850Y (en) | Movable refrigerator | |
| CN208257498U (en) | The automatic commutation system of standby electricity suitable for refrigerator car | |
| CN217863997U (en) | Spare power control device | |
| CN216959330U (en) | Automatic switching device for road and commercial power of refrigerating unit | |
| CN2711985Y (en) | Single phase motor energy saving device for refrigerator, freezer and air conditioner | |
| CN201764770U (en) | Mobile refrigeration equipment driven by direct current (DC) with air curtain | |
| CN103471309B (en) | The movable refrigeration house of DC powered | |
| CN205647001U (en) | High -voltage inverter drives damp device | |
| CN204349842U (en) | For the power consumption starter of commercial refrigeration compressor electric motor | |
| JP4475846B2 (en) | Vehicle cooling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |