Hybrid power type refrigerating unit for refrigerator car

Abstract

The utility model relates to a hybrid power type refrigerating unit for a refrigerator car, and belongs to the technical field of transportation refrigeration. Comprising an engine, the engine is in transmission connection with a compression part for refrigeration and a power generation part for power generation of the hybrid power compressor through a transmission part, the power generation part is connected with an alternating-current-to-direct-current power module, and a low-voltage direct-current output end of the alternating-current-to-direct-current power module is connected with a refrigerating unit low-voltage system. By the adoption of the hybrid power compressor, on the basis that normal work of the refrigerating unit is guaranteed, the size of the refrigerating unit can be reduced, and the weight of the refrigerating unit is reduced.

Description

Technical Field

[0001] The utility model relates to a hybrid power refrigeration unit for a refrigerated vehicle, belonging to the technical field of transport refrigeration. Background Art

[0002] With people's growing consumption and health needs and the retail development trend of increasing e-commerce penetration, the cold chain transportation market has entered a stage of rapid growth; with the in-depth development of automobile electrification, automobile electrification has gradually expanded from buses, passenger cars, trucks, logistics transport vehicles and other fields, and with the development of battery technology, the demand for long-distance cold chain transportation has gradually increased, and the refrigeration unit as an independent pure electric freezing and refrigeration unit has become an indispensable configuration for pure electric refrigerated trucks as long-distance cold chain logistics transport vehicles.

[0003] At present, the structural units of the refrigeration unit mainly include engines, electric compressors, generators, evaporators and condensers, and there are three working modes. The first is the diesel mode, which uses the engine's own mechanical energy. The engine drives the generator through a belt or coupling to generate electricity. The generator converts the engine's kinetic energy into electrical energy, and outputs it to the electric compressor and various electrical appliances of the unit to achieve normal operation of the unit; the second is the pure electric mode, which directly supplies the electric compressor and various electrical appliances of the unit through the high-voltage electricity of the pure electric refrigeration truck itself, to achieve normal operation of the unit; the third is the backup power mode, which converts the connected AC power into the electric compressor and various electrical appliances of the unit to achieve normal operation of the unit.

[0004] Therefore, the engine, the generator, and the electric compressor need to be arranged as independent components inside the refrigeration unit, which increases the volume of the refrigeration unit and the weight of the refrigeration unit itself. Utility Model Content

[0005] The utility model aims to provide a hybrid power refrigeration unit for a refrigerated vehicle, so as to solve the problem that the existing refrigeration unit has a relatively large volume.

[0006] To achieve the above purpose, the solution of the utility model includes:

[0007] The utility model discloses a hybrid power refrigeration unit for a refrigerated vehicle, comprising an engine, which is connected to a compression unit of a hybrid power compressor for refrigeration and a power generation unit for power generation through a transmission unit, the power generation unit is connected to an AC to DC power supply module, and a low-voltage DC output end of the AC to DC power supply module is connected to a low-voltage system of the refrigeration unit.

[0008] Furthermore, the high-voltage DC output terminal of the AC-to-DC power module is used to connect to the high-voltage system of the refrigerated truck.

[0009] Furthermore, the electric part of the hybrid compressor used to electrically drive the compression part is used to be connected to the charging port of the unit.

[0010] Furthermore, the AC-to-DC power supply module also includes an AC input interface for connecting to a charging port of the unit.

[0011] Furthermore, the electric part of the hybrid compressor used to electrically drive the compression part is used to be connected to the charging port of the refrigerated truck.

[0012] Furthermore, the AC-to-DC power supply module also includes an AC input interface for connecting to a charging port of the refrigerated truck.

[0013] Furthermore, the low-pressure system of the refrigeration unit includes a low-pressure load, and the low-pressure load includes a condensing fan, an evaporating fan and a solenoid valve.

[0014] Furthermore, the low-voltage load also includes a battery, and the battery supplies power to connect the low-voltage load.

[0015] Furthermore, the high-voltage system of the refrigerated truck includes a vehicle power battery, and the vehicle power battery is connected to the electric part of the hybrid compressor through a DC to AC power module.

[0016] Furthermore, the transmission part includes a driving wheel arranged on the output shaft of the engine, a driven wheel arranged on the output shaft of the power generation part, and a belt connecting the driving wheel and the driven wheel.

[0017] Beneficial effects of the utility model:

[0018] The utility model is an improved invention, which provides a hybrid power refrigeration unit for a refrigerated vehicle, and improves on the original refrigeration unit. The engine of the refrigeration unit of the utility model is connected to the compression part of the hybrid power compressor for refrigeration and the power generation part for power generation through a transmission part. The power generation part of the hybrid power compressor is electrically connected to the AC input end of the AC-to-DC power module, and the AC power output by the power generation part is converted into DC power to supply power to the low-voltage system of the refrigeration unit. The utility model adopts a hybrid power compressor. On the basis of ensuring the normal operation of the refrigeration unit, compared with the existing arrangement of the engine, generator, and electric compressor as independent components inside the refrigeration unit, the volume of the refrigeration unit can be reduced and the weight of the refrigeration unit can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a working principle diagram of a hybrid refrigeration unit for a refrigerated vehicle according to an embodiment of the utility model;

[0020] Figure 2 The utility model is an electrical schematic diagram of a hybrid power refrigeration unit for a refrigerated vehicle according to an embodiment of the present utility model.

[0021] Description of reference numerals:

[0022] 1. Engine; 2. Hybrid compressor; 3. AC-DC power module; 4. DC-AC power module; 5. Transmission part. Detailed implementation

[0023] To solve the problems in the background technology, the present utility model improves on the original refrigeration unit. The engine of the refrigeration unit of the present utility model is transmission-connected to the compression part for refrigeration and the power generation part for power generation of the hybrid compressor through a transmission part. The power generation part of the hybrid compressor is electrically connected to the AC input end of the AC-DC power module, and converts the AC power output by the power generation part into DC power to supply power to the low-voltage system of the refrigeration unit. The present utility model adopts a hybrid compressor, which can reduce the volume and weight of the refrigeration unit on the basis of ensuring the normal operation of the refrigeration unit, compared with the existing arrangement of the engine, generator, and electric compressor as independent components inside the refrigeration unit.

[0024] To make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0025] An embodiment of a hybrid refrigeration unit for a refrigerated vehicle:

[0026] A hybrid refrigeration unit for a refrigerated vehicle includes an engine. The engine is transmission-connected to the compression part for refrigeration and the power generation part for power generation of the hybrid compressor through a transmission part. The power generation part is connected to the AC input end of the AC-DC power module, and the low-voltage DC output end of the AC-DC power module is connected to the low-voltage system of the refrigeration unit.

[0027] As another implementation, a hybrid refrigeration unit for a refrigerated vehicle of the present utility model includes an engine. The engine is transmission-connected to the compression part for refrigeration and the power generation part for power generation of the hybrid compressor through a transmission part. The power generation part is connected to the AC input end of the AC-DC power module, the low-voltage DC output end of the AC-DC power module is connected to the low-voltage system of the refrigeration unit, and the high-voltage DC output end of the AC-DC power module is used to connect to the high-voltage system of the refrigerated vehicle.

[0028] Specifically, the electric part of the hybrid compressor for electrically driving the compression part is used to connect to the unit charging port. The unit charging port is independent of the refrigerated vehicle charging port to avoid the normal operation of the refrigeration unit being affected by vehicle faults.

[0029] Specifically, the AC-DC power module further includes an AC input interface for connecting to the unit charging port.

[0030] As other embodiments, the electric part of the electric drive compressor of the hybrid compressor is used to connect to the charging port of the refrigerated truck; the AC-DC power module further includes an AC input interface for connecting to the charging port of the refrigerated truck.

[0031] Specifically, the low-pressure system of the refrigeration unit includes low-pressure loads, and the low-pressure loads include a condenser fan, an evaporator fan, and a solenoid valve.

[0032] Specifically, the low-pressure load further includes a storage battery, and the storage battery is powered to connect to the low-pressure load.

[0033] Specifically, the high-pressure system of the refrigerated truck includes a vehicle-mounted power battery, and the vehicle-mounted power battery is connected to the electric part of the hybrid compressor through a DC-AC power module.

[0034] Specifically, the transmission part includes a driving wheel arranged on the output shaft of the engine, a driven wheel arranged on the output shaft of the power generation part, and a belt connecting the driving wheel and the driven wheel.

[0035] For easy understanding, now in combination with Figure 1 and Figure 2 the hybrid refrigeration unit for refrigerated trucks of the present invention will be described in detail.

[0036] As Figure 1 shown, the engine 1 is drivingly connected to the compression part and the power generation part of the hybrid compressor 2 through the transmission part 5. The power generation part of the hybrid compressor 2 is connected to the AC input end of the AC-DC power module 3. The low-voltage DC output end of the AC-DC power module 3 is connected to the low-pressure system of the refrigeration unit, and the high-voltage DC output end of the AC-DC power module 3 is used to connect to the high-pressure system of the refrigerated truck.

[0037] Among them, the compression part (compressor) of the hybrid compressor 2 is used for refrigeration, and the power generation part (generator) of the hybrid compressor 2 is used for power generation.

[0038] Among them, the low-pressure system of the refrigeration unit includes low-pressure loads, and the low-pressure loads include a condenser fan, an evaporator fan, and a solenoid valve; the low-pressure load further includes a storage battery, and the storage battery is powered to connect to the low-pressure load.

[0039] Among them, the high-pressure system of the refrigerated truck includes a vehicle-mounted power battery, and the vehicle-mounted power battery is connected to the electric part (motor) of the hybrid compressor 2 through a DC-AC power module 4.

[0040] Among them, the electric part of the hybrid compressor 2 is used to connect to the charging port of the refrigerated truck; the electric part of the hybrid compressor 2 is used to electrically drive the compression part of the hybrid compressor 2.

[0041] Among them, the AC-DC power module 3 further includes an AC input interface for connecting to the charging port of the refrigerated truck.

[0042] Among them, the transmission part 5 includes a driving wheel arranged on the output shaft of the engine 1, a driven wheel arranged on the output shaft of the power generation part, and a belt connecting the driving wheel and the driven wheel.

[0043] As Figure 2 shown in the electrical schematic diagram of the hybrid refrigeration unit, the 380V mains power is connected to the electric part of the hybrid compressor through the charging port. The 380V mains power is also connected to the AC input interface of the AC-DC power module through the charging port. The low-voltage DC output terminal of the AC-DC power module is connected to the low-pressure system of the refrigeration unit, and the high-voltage DC output terminal of the AC-DC power module is used to connect to the high-pressure system of the refrigerated truck; the low-voltage DC output terminal of the AC-DC power module is also connected to the low-pressure system of the refrigeration unit through the controller, and the controller is used to send corresponding control signals to the low-pressure system of the refrigeration unit. The charging port here can be an independent unit charging port or a refrigerated truck charging port.

[0044] The high-pressure system of the refrigerated truck includes the vehicle-mounted power battery. The vehicle-mounted power battery is connected to the electric part (motor) of the hybrid compressor through the DC-AC power module; the low-pressure system of the refrigeration unit includes a condenser fan, an evaporator fan, a solenoid valve, and a storage battery. The storage battery supplies power to connect the condenser fan, the evaporator fan, and the solenoid valve. The storage battery also supplies power to connect to the controller, and the controller is used to send corresponding control signals to the low-pressure system of the refrigeration unit. The storage battery is also used to give a starting signal to the engine to avoid the impact of vehicle failures on the diesel mode of the refrigeration unit.

[0045] The operation of the hybrid refrigeration unit for refrigerated trucks requires the simultaneous provision of a high-voltage DC power supply, a low-voltage 24V DC power supply, and corresponding control signals issued by the panel (controller). The controller is used to issue corresponding control signals (that is, refrigeration instructions and target temperatures); during normal operation, the vehicle-mounted power battery provides the high-voltage DC power supply, the low-voltage 24V DC power supply, and the power supply for the cold machine load. The panel controls and issues refrigeration instructions, adjusts the opening or closing of the solenoid valve, and sequentially starts electrical components such as fans and compressors; when the vehicle is parked and uses 380V alternating current (380V mains power), through the AC-DC power module, the 380V alternating current is converted into 600V high-voltage direct current and used as the high-voltage power supply for the cold machine.

[0046] The working modes of the hybrid refrigeration unit for refrigerated trucks include: diesel mode, pure electric mode, and backup power mode.

[0047] Among them, in the diesel mode, the mechanical energy of the engine 1 is transmitted to the hybrid compressor 2 through a belt or a coupling. The hybrid compressor 2 engages the clutch under the control of relevant control logic (the main shaft of the hybrid compressor is connected to the compressor piston and the motor). The compressor and the generator of the hybrid compressor 2 work simultaneously. After the hybrid compressor 2 generates electricity and is converted by the AC-DC power module (AC-to-DC power module 3), low-voltage DC power and high-voltage DC power are output. The low-voltage DC power can be used for the operation of electrical appliances such as the evaporator fan, condenser fan, and solenoid valve of the unit, as well as for charging the low-voltage battery. The high-voltage DC power can be transmitted to the vehicle battery (vehicle power battery) for charging.

[0048] In the pure electric mode, the high-voltage power of the vehicle itself is directly converted by the DC-AC power module (DC-to-AC power module 4) and supplied to the hybrid compressor 2 for use. At the same time, the low-voltage power of the vehicle is supplied to other electrical appliances of the unit. Among them, the alternating current output by the DC-AC power module from the high-voltage power of the vehicle drives the hybrid compressor 2, and the clutch is in a non-engaged state under the control of relevant control logic, and only the compression part of the hybrid compressor 2 works.

[0049] In the backup power mode, the commercial power is connected to the hybrid compressor 2 and the AC-DC power module 3. The commercial power is connected to the hybrid compressor 2 on one path and supplied to other electrical appliances after being converted by the AC-DC power module 3 on the other path.

[0050] The hybrid refrigeration unit for the refrigerated vehicle mainly includes: an engine 1, a hybrid compressor 2, an AC-DC power module (AC-to-DC power module 3), and a (DC-to-AC power module 4).

[0051] When the unit operates in the diesel mode, after the electricity generated by the hybrid compressor is converted, in addition to being used by other electrical appliances of the unit, it can also charge the vehicle battery.

[0052] The hybrid compressor of the present utility model integrates the functions of a generator and a compressor, making its structural layout simpler, the overall volume of the unit smaller, and the overall weight of the unit lighter.

[0053] The hybrid refrigeration unit of the present utility model utilizes the power generation function of the hybrid compressor to charge the vehicle battery while providing power for the electrical appliances of the unit.

[0054] The hybrid independent unit of the present utility model adopts a hybrid compressor that integrates a compressor and a generator, saving the internal space of the independent unit, reducing the volume of the independent unit, and lowering the weight of the unit. Compared with the existing independent units, this method reduces the volume of the unit, simultaneously reduces the self-weight of the unit, and can provide a charging function for the vehicle battery, increasing the cruising range of the pure electric refrigerated truck and improving the utilization efficiency of the pure electric refrigerated and frozen independent unit.

[0055] Under different working modes, the present utility model can, on the premise of meeting the power consumption requirements of the unit itself, also charge the vehicle. Moreover, the integrated system layout can reduce the volume of the unit itself, lower the weight of the unit itself, and increase the cruising range of the pure electric refrigerated truck.

Claims

1. A hybrid refrigeration unit for a refrigerated vehicle, comprising an engine, characterized in that: The engine is connected to the compression part of the hybrid compressor for refrigeration and the power generation part for power generation through a transmission part. The power generation part is connected to an AC-to-DC power supply module, and the low-voltage DC output end of the AC-to-DC power supply module is connected to the low-voltage system of the refrigeration unit.

2. The hybrid refrigeration unit for a refrigerated vehicle according to claim 1, characterized in that: The high-voltage DC output terminal of the AC-to-DC power supply module is used to connect to the high-voltage system of the refrigerated truck.

3. The hybrid refrigeration unit for a refrigerated vehicle according to claim 1, characterized in that: The hybrid power compressor is used to electrically drive the electric part of the compression part and is connected to the charging port of the unit.

4. The hybrid refrigeration unit for a refrigerated vehicle according to claim 1 or 3, characterized in that: The AC-to-DC power supply module also includes an AC input interface for connecting to a charging port of the unit.

5. The hybrid refrigeration unit for a refrigerated vehicle according to claim 1, characterized in that: The hybrid power compressor is used to electrically drive the electric part of the compression part and is connected to the charging port of the refrigerated truck.

6. The hybrid refrigeration unit for a refrigerated vehicle according to claim 1 or 5, characterized in that: The AC-to-DC power supply module also includes an AC input interface for connecting to a charging port of a refrigerated truck.

7. The hybrid refrigeration unit for a refrigerated vehicle according to claim 1, characterized in that: The low-pressure system of the refrigeration unit includes a low-pressure load, and the low-pressure load includes a condensing fan, an evaporating fan and a solenoid valve.

8. The hybrid refrigeration unit for a refrigerated vehicle according to claim 7, characterized in that: The low-voltage load also includes a battery, and the battery supplies power to connect the low-voltage load.

9. The hybrid refrigeration unit for a refrigerated vehicle according to claim 2, characterized in that: The high-voltage system of the refrigerated truck includes a vehicle power battery, and the vehicle power battery is connected to the electric part of the hybrid compressor through a DC to AC power module.

10. The hybrid refrigeration unit for a refrigerated vehicle according to claim 1, characterized in that: The transmission part comprises a driving wheel arranged on the output shaft of the engine, a driven wheel arranged on the output shaft of the power generation part, and a belt connecting the driving wheel and the driven wheel.

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