TWI637868B - Pre-cooling system and method for logistics vehicles - Google Patents

Abstract

The disclosure provides a pre-cooling system for the cargo compartment of a logistics vehicle, which includes a control box located on a logistics vehicle and an AC to DC power supply module located outside the logistics vehicle. The control box is coupled to a plug interface, and the control box also includes a control and protection circuit for preventing one of the logistics vehicles from starting when the cargo compartment is pre-cooled. The AC to DC power supply module further includes a charging device, and a plurality of plugs are coupled to the charging device. The plurality of plugs are matched with the plug interface.

Description

Precooling system and method for cargo compartment of logistics vehicle

This case relates to a pre-cooling system and method for the cargo compartment of a logistics vehicle.

Generally speaking, the pre-cooling method of the cargo compartment of the logistics vehicle is to start the logistics vehicle first to pre-cool the cargo compartment. After the logistics vehicle is started, the engine idle speed drives the on-board compressor to transfer the refrigerant to allow the cargo compartment temperature to reach a predetermined value before loading cargo. To achieve the effect of pre-cooling the cargo hold. However, at the idle speed of a logistics vehicle, the operation efficiency of the on-board compressor is very low, so it is often necessary to increase the throttle to increase the speed to achieve a rapid cooling effect. However, in this semi-closed space of the logistics distribution center, because multiple logistics vehicles perform the pre-cooling operation before stacking cargo at the same time, not only a large amount of exhaust gas is emitted, which is harmful to the health of workers, but also the fuel efficiency is increased due to poor fuel efficiency. The generated hot air also causes the indoor temperature to rise, making the pre-cooling time longer.

In addition, the Consumer Protection Division of the Executive Yuan had spot-checked 80 logistics vehicles on the road. Of the 48 vehicles carrying frozen or refrigerated food, 35 vehicles had insufficient coldness, accounting for more than 70%. Relatively speaking, near the exit of the logistics distribution center is the easiest place to spot check. Therefore, logistics operators expect Under the restriction that the average price of each car does not increase by 50,000 yuan, we seek solutions to the above problems.

An embodiment of the present disclosure provides a pre-cooling system for a cargo compartment of a logistics vehicle, which includes a control box located on a logistics vehicle and an AC-to-DC power supply module located outside the logistics vehicle. The control box is coupled to a plug interface. The control box also includes a control and protection circuit to prevent one of the logistics vehicles from starting when the cargo compartment of the logistics vehicle is pre-cooled. The AC to DC power supply module also includes a charging device, and a plurality of plugs are coupled to the charging device. The plurality of plugs are matched with the plug interface.

An embodiment of the present disclosure provides a pre-cooling system for a cargo compartment of a logistics vehicle. The pre-cooling system for the cargo compartment of a logistics vehicle includes a control box located in a logistics vehicle. The control box further includes: a control and protection circuit for restricting the start of an engine of the logistics vehicle when a cargo compartment of the logistics vehicle is pre-cooled; a signal input circuit coupled to an input of the control and protection circuit Terminal for detecting whether a charging gun is connected to the logistics vehicle; a signal output circuit coupled to an output terminal of the control and protection circuit for conducting between an electric compressor and an on-board compressor in the logistics vehicle And a power conversion circuit that is coupled to the other input end of the control and protection circuit, an input end of the signal input circuit, and an input end of the signal output circuit, respectively, to convert one of the logistics vehicles. Power the control box with power.

An embodiment of the present disclosure provides a pre-cooling of a cargo compartment of a logistics vehicle. Method, the method for pre-cooling the cargo compartment of a logistics vehicle includes: switching between an electric compressor and an on-board compressor in a logistics vehicle to perform pre-cooling by the electric compressor; and from outside the logistics vehicle, in a At a preset time, power is automatically supplied to the electric compressor; one of the logistics vehicles is prohibited from starting; the cargo compartment of the logistics vehicle is pre-chilled to a preset temperature; and the electric compressor is stopped from being driven.

The foregoing has outlined rather broadly the features and technical advantages of the present invention so that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention are described below and form the subject of the patentable scope of the invention. Those skilled in the art will appreciate that the concepts and specific embodiments disclosed may be readily utilized as a basis for modifying or designing other structures or procedures for carrying out the same purposes of the present invention. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the scope of the accompanying patent application.

11‧‧‧ Pre-cooling system for cargo compartment of logistics vehicle

12‧‧‧ Refrigeration System

13‧‧‧External Power

14‧‧‧Vehicle circuit

15‧‧‧Engine

16‧‧‧AC to DC Power Supply Module

17‧‧‧Plug Interface

18‧‧‧Control Box

19‧‧‧ Electric compressor

22‧‧‧car compressor

23‧‧‧ condenser

24‧‧‧ Dry Bottle

25‧‧‧Expansion valve

26‧‧‧Evaporator

31‧‧‧Logistics vehicle

41‧‧‧AC to DC Power Supply Module

42‧‧‧ Charging device

43‧‧‧Plug

44‧‧‧Plug

45‧‧‧Power Conversion Circuit

46‧‧‧Reservation timing circuit

47‧‧‧Wire

48‧‧‧Electric compressor

51‧‧‧External Power

61‧‧‧Control Box

62‧‧‧Plug Interface

63‧‧‧Cargo Hold

64‧‧‧Vehicle circuit

65‧‧‧car compressor

66‧‧‧Refrigerant pipeline

67‧‧‧ Radiator

68‧‧‧Evaporator

71‧‧‧Power Conversion Circuit

72‧‧‧Control and protection circuit

73‧‧‧Signal output circuit

74‧‧‧Signal input circuit

72-1, 72-3‧‧‧ Input

72-2‧‧‧ Output

73-1, 74-1‧‧‧ Input

76, 77, 78, 79, 80‧‧‧ arrows

81, 82, 83, 84, 85‧‧‧ steps

86‧‧‧External Power

87, 88, 89‧‧‧ logistics vehicles

91‧‧‧AC to DC Power Supply Module

92‧‧‧ Charging device

93, 94, 95‧‧‧ plugs

96‧‧‧Wire

97‧‧‧Power Conversion Circuit

98‧‧‧Reservation timing circuit

100‧‧‧Logistics vehicle refrigeration device

200‧‧‧Logistics vehicle refrigerating device

120‧‧‧ Pre-cooling method for cargo compartment of logistics vehicle

121, 122, 123, 124, 125‧‧‧ steps

The aspects of the disclosure of this application can be best understood from the following detailed description and accompanying drawings. Note that according to industry standard implementations, various features are not drawn to scale. In fact, for clarity of discussion, the dimensions of various features may be arbitrarily increased or reduced.

FIG. 1 is a diagram illustrating a refrigerating device of a logistics vehicle according to some embodiments.

FIG. 2 illustrates a refrigerating device of a logistics vehicle according to some embodiments. Illustration.

FIG. 3 is a circuit diagram illustrating a control box according to some embodiments.

FIG. 4 is a diagram illustrating an AC-to-DC power supply module according to some embodiments.

5 is a flowchart illustrating a method for pre-cooling a cargo compartment of a logistics vehicle according to some embodiments.

The schematic diagram of the present disclosure has been described above, so that the detailed description of the present disclosure below can be better understood. Other technical features and advantages that constitute the subject matter of the patent application of this disclosure will be described below. Those with ordinary knowledge in the technical field to which this disclosure belongs should understand that the concepts and specific embodiments disclosed below can be used as a basis to easily modify or design other structures or processes to achieve the same purpose as this disclosure. Those with ordinary knowledge in the technical field to which this disclosure belongs should also understand that such equivalent constructions cannot depart from the spirit and scope of this disclosure as set forth in the appended patent application scope.

The following disclosure provides many different implementations or examples for implementing different features of this application. Specific examples of components and configurations are described below to simplify the disclosure of this application. Of course, these are just examples and are not intended to limit this application. For example, the following is described in the second feature Forming the first feature above or above may include an embodiment in which the first and second features are formed in direct contact, or an embodiment in which other features are formed between the first and second features, so the first and second Features may not be in direct contact. In addition, the present application may repeat element symbols and / or letters in different examples. This repetition is for the sake of simplicity and clarity, and does not govern the relationship between different implementations and / or the architecture in question.

Furthermore, this application can use spatially equivalent terms, such as "under", "below", "lower", "higher", "higher" and other similar words, to describe the first The relationship of an element or feature to another element or feature. Spatial correspondence terms are used to include different orientations of the device in use or operation in addition to the orientations described in the drawings. The device may be positioned (rotated 90 degrees or other orientation), and the corresponding description of the space used in this application may be interpreted accordingly.

The terms "coupling" and "coupling" used throughout the specification of this case (including the scope of patent application) can refer to any direct or indirect means of connection. For example, if the first device is described as being coupled to the second device, it should be construed that the first device can be directly connected to the second device, or the first device can be connected through another device or some connection means. Indirectly connected to the second device. In addition, wherever possible, the same reference numbers are used in the drawings and embodiments to represent the same or similar parts. Elements / components / steps using the same reference numerals or using the same terms in different embodiments may refer to related descriptions.

In order to solve the problems that the exhaust gas of the logistics vehicle is harmful to the health of the operator during the indoor pre-cooling phase of the logistics vehicle, the heating of the waste heat caused by the operation of the engine of the logistics vehicle, the poor fuel efficiency of the logistics vehicle, and the increase in fuel costs. In addition, it adopts a more flexible manpower dispatching method, which meets the government's requirements for low-temperature preservation.

The embodiment of the present case discloses an AC-DC power supply module with reservation timing and sequencing control functions, which uses the power cord set and charging gun (or plug) of this device to provide DC power to drive at least one logistics vehicle during the pre-cooling stage. The electric compressor. During the pre-cooling phase, the control box restricts the engine of the logistics vehicle to start pre-cooling by using an electric compressor to allow the cargo compartment temperature to reach a predetermined value, and then automatically powers off and informs the operator to start cargo loading. After the pre-cooling phase is completed, the charging gun (or plug) is disconnected from the plug interface on the logistics vehicle and switched to the mode operated by the original vehicle compressor through the control box. After the pre-cooling is completed, the engine of the logistics vehicle can be started normally, and the low-temperature preservation effect is maintained during the logistics transportation process.

1 is a diagram illustrating a refrigerating device 100 of a logistics vehicle according to some embodiments. The refrigerating device 100 of a logistics vehicle includes a pre-cooling system 11 for the cargo compartment of the logistics vehicle, an original refrigeration system 12 for the logistics vehicle, an external power source 13, a vehicle circuit 14 and an engine 15 . The pre-cooling system 11 of the cargo compartment of the logistics vehicle includes an AC-to-DC power supply module 16, a plug interface 17, a control box 18, and an electric compressor 19. The refrigeration system 12 includes a vehicle-mounted compressor 22, a condenser 23, a drying bottle 24, an expansion valve 25, and an evaporator 26.

In one embodiment, the AC-to-DC power supply module 16 is located at the object. Outside the trolley, the external power source 13 is configured to be coupled to the AC to DC power supply module 16. The AC to DC power supply module 16 is configured to be coupled to the plug interface 17. The plug interface 17 is respectively coupled to the control box 18 and the electric compressor 19. The control box 18 is coupled to the existing vehicle circuit 14 on the logistics vehicle, the vehicle circuit 14 is coupled to the electric compressor 19, and the control box 18 is also coupled to the electric compressor 19. The electric compressor 19 is connected in parallel with the existing on-board compressor 22 on the logistics vehicle. In detail, the refrigerant circuit of the electric compressor 19 and the on-board compressor 22 is connected in parallel, and the electric compressor 19 and the on-board compressor 22 are connected in parallel. Connected to the condenser 23 in parallel. The condenser 23 is connected to the drying bottle 24; the drying bottle 24 is connected to the expansion valve 25; the expansion valve 25 is connected to the evaporator 26; the evaporator 26 is connected to the electric compressor 19 and the vehicle-mounted compressor 22 to form a refrigerant circulation circuit. In addition, the vehicle-mounted compressor 22 is coupled to the engine 15, and the two are coupled by a suitable kinetic energy transmission method, such as a belt, a clutch, a gear, or a transmission shaft, or controlled by an electromagnetic clutch. When turned on, current flows through Electromagnetic clutch. The electromagnetic clutch generates magnetic force through current and attracts the clutch plate. The clutch belt disc is connected with the transmission shaft as a whole. The engine 15 drives the vehicle-mounted compressor 22.

In one embodiment, the external power source 13 is a suitable industrial power source or a domestic power source, such as 110 volt or 220 volt AC power. In one embodiment, the AC to DC power supply module 16 is configured to be located outside the logistics vehicle, and the AC to DC power supply module 16 is configured to convert the AC power of the external power source 13 into the DC power used by the logistics vehicle. The DC power supply module 16 is capable of converting AC power to DC power required by the electric compressor 19. In one embodiment, the AC-to-DC power supply module 16 is configured to be capable of being reserved at a scheduled time. Start it by itself, and start the pre-cooling program for the logistics vehicle (also called electric pre-cooling program, the same applies hereinafter). In one embodiment, the AC-to-DC power supply module 16 is configured to provide the power required for pre-cooling multiple logistics vehicles at the same time to pre-cool the cargo compartments of multiple logistics vehicles. In one embodiment, the AC-to-DC power supply module 16 is configured to perform time sharing and sequencing for the pre-cooling program of multiple logistics vehicles, in other words, the pre-cooling time points of multiple logistics vehicles have a sequence.

In one embodiment, the plug interface 17 is configured on a logistics vehicle, and can be arranged below the cargo space, and the space between the front and rear tires. The plug interface 17 adopts a standard charging socket. The plug interface 17 can receive high-voltage electric power to use the compressor 19, and the plug interface 17 can receive low-voltage electricity for the control box 18 or other air-conditioning electrical systems. The plug interface 17 can receive Or output the control signal. In one embodiment, the plug interface 17 is capable of transmitting power and control signals.

In one embodiment, the control box 18 is coupled to the plug interface 17, and the control box 18 directs the DC power from the AC to DC power supply module 16 and provides the direct power to the electric compressor 19 for the pre-cooling process (also (Can be called electric pre-cooling program) instead of on-board compressor 22, refrigerant compression is performed by the electric compressor 19 to achieve the cooling effect. In other words, the control box 18 can switch between the electric compressor 19 and the on-vehicle compressor 22. Between the two, choose one of them to perform refrigerant compression. For example: during pre-cooling, switch to refrigerant compression by electric compressor 19; during outdoor transportation, switch to refrigerant compression by on-board compressor 22. . In one embodiment, the control box 18 is configured during the pre-cooling period of the cargo compartment of the logistics vehicle to restrict the engine 15 of the logistics vehicle from starting and not use the engine 15 to drive The on-board compressor 22 is used for refrigeration, and the electric compressor 19 is used to provide the refrigerated or refrigerated air-conditioning capabilities required in the cargo compartment of the logistics vehicle to achieve the effect of pre-cooling the cargo compartment without starting the engine 15, so as to solve the problem of refrigerated home delivery During the indoor stacking process, the air pollution, waste heat, and fuel consumption problems caused by the engine 15 driving the vehicle-mounted compressor 22 to refrigerate the vehicle. On the other hand, the control box 18 restricting the starting of the engine 15 of the logistics vehicle can prevent human error from starting the engine 15 and cause damage to the logistics vehicle itself or the AC to DC power supply module 16, for example, to prevent the logistics vehicle from moving and breaking the AC to DC The circuit of the power supply module 16; or avoid damage to the pipelines of the mechanical transmission mechanism or the refrigeration system 12 of the logistics vehicle.

In one embodiment, the refrigerant pipes of the electric compressor 19 and the vehicle-mounted compressor 22 are connected in parallel. In the pre-cooling phase, the on-vehicle compressor 22 is stationary or closed and does not compress the refrigerant. The AC to DC power supply module 16 provides DC power to drive the electric compressor 19. The electric compressor 19 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant passes through the condenser 23 to heat the cold air from the outside. The exchange reduces the temperature of the gaseous refrigerant and gradually condenses to form a liquid refrigerant in the duct. Therefore, the condenser 23 is a device that cools the high-temperature and high-pressure gaseous refrigerant sent from the electric compressor 19 to liquefy into a liquid refrigerant. Thereafter, the liquid refrigerant enters the drying bottle 24, and the drying bottle 24 also has the functions of temporarily storing the refrigerant, filtering, dehumidifying, and separating the gaseous liquid refrigerant in the refrigeration system 12. The liquid refrigerant then enters the expansion valve 25. The expansion valve 25 is located at the entrance of the evaporator 26. It has the function of reducing the pressure of the refrigerant and adjusts the flow rate of the refrigerant into the evaporator 26. After the liquid refrigerant flows through the expansion valve 25, the refrigerant The pressure decreases to a low temperature and low pressure liquid. When the liquid refrigerant evaporates into a gaseous refrigerant, a large amount of thermal energy is required. The evaporator 26 uses this principle. The low-temperature and low-pressure liquid refrigerant from the expansion valve 25 absorbs the heat of the surrounding air and evaporates, so that the temperature in the cargo compartment of the logistics vehicle is reduced to achieve Cold room (refrigerated or frozen) effect. The vaporized low-temperature and low-pressure gaseous refrigerant is sucked into the electric compressor 19 again to complete the cycle, and the heat exchange function is realized during the process of heat absorption and release. When the above pre-cooling phase is completed, the control box 18 is switched to the mode operated by the vehicle-mounted compressor 22, and the engine 15 can be normally started to maintain a low-temperature fresh-keeping effect during the logistics transportation process.

In one embodiment, the electric compressor 19 is a DC-driven electric compressor. Mature electric compressor products on the market, such as a three-machine integrated electric compressor, are integrated with a scroll group, a motor, and a driving board. Therefore, the built-in motor method is used to make the drive axis of the scroll group coaxial with the motor axis, and the low-temperature refrigerant returns to assist the motor and the drive plate to dissipate heat. The vehicle-mounted compressor 22 is an existing compressor on the original logistics vehicle, such as a piston reciprocating compressor, a swash plate reciprocating compressor, a vane rotary compressor, or a scroll compressor. The refrigerant in the refrigeration system 12 uses environmentally friendly refrigerants, such as: R12, R22, R-410A, R-407C, or R134a. The engine 15 is a fuel engine, such as a gasoline and diesel engine; or an electric vehicle engine. Vehicle circuit 14 is an existing motor control circuit on a logistics vehicle. Vehicle circuit 14 is coupled to an electric compressor 19. Vehicle circuit 14 is a collection of power and signal transmission lines or components on a refrigeration vehicle 100 of a logistics vehicle. For example: a vehicle Circuit 14 can regulate on-board compression The engine 22 is turned on and off; or, the vehicle circuit 14 controls the operation of the clutch and the belt between the engine 15 and the vehicle-mounted compressor 22.

FIG. 2 is a diagram illustrating a logistics vehicle refrigeration device 200 according to some embodiments. The logistics vehicle refrigeration device 200 includes a logistics vehicle 31, an AC-to-DC power supply module 41, and an external power source 51. The logistics truck 31 is a refrigerated and refrigerated truck commonly used in the industry, such as a 3.5-ton logistics truck or a freezer trailer. The AC to DC power supply module 41 includes a charging device 42, plugs 43 and 44, and a wire 47. The plugs 43 and 44 are connected to the charging device 42 through the wire 47 so that the plugs 43 and 44 can be extended to the parking position of the logistics vehicle 31. : The length of the electric wire 47 is 6 meters. The plugs 43 and 44 are also called charging guns. In particular, the plugs 43 and 44 are DC hybrid plugs (charging guns). Each plug of the plugs 43 and 44 contains multiple terminals (PINs), and some of the terminals are The terminals for transmitting power, and the other terminals are terminals for controlling signal transmission. The terminals for transmitting power are also divided into transmitting high-voltage electric-powered compressors 48, and transmitting low-voltage electrics for control boxes 61 and air-conditioning electric systems. Plugs 43, 44 have a rated current of 32 amps (A) and have positive and negative poles. There are 5 terminals for control signal transmission, which are CANH, CANL (Controller Area Network (CAN) logic high, Controller Area Network logic low), + 12V, GND (Ground), Plug-in confirmation terminal. In another embodiment, the specifications of the plugs 43 and 44 adopt national standards, such as: Japan's DC fast charging standard (CHAdeMO), Continental Recommended National Standard (GB / T), Society of Automotive Engineers (Society of Automotive Engineers, SAE), German Industrial Standard (DIN), etc. In one real In the embodiment, the AC to DC power supply module 41 includes at least two plugs, so it can provide pre-cooling for multiple logistics vehicles at the same time.

The charging device 42 includes a power conversion circuit 45 and a reservation timing circuit 46. The power conversion circuit 45 is composed of a rectifier, such as a half-wave rectifier, a single-phase half-wave rectifier, a three-phase half-wave rectifier, a full-wave rectifier, a center-tap full-wave rectifier, a bridge-type full-wave rectifier, or a voltage doubler rectifier. The AC-to-DC power supply module 41 is electrically connected to the external power source 51. The AC-to-DC power supply module 41 receives AC power from the external power source 51, and then converts the AC power to DC power through the power conversion circuit 45. The DC high-voltage power supplies the compressor. 48 uses, DC low voltage electricity is used for control box 61 and air-conditioning electric system. In particular, the voltage and current quota of the DC power are matched with the electric compressor 48, so that during the pre-cooling time, the AC to DC power supply module 41 can supply power and drive the electric compressor 48. In particular, the step of converting AC power to DC power is performed outside the logistics vehicle 31, so that the logistics vehicle 31 does not need to be additionally equipped with an AC to DC circuit to reduce costs.

The reservation timing circuit 46 is composed of a timer. It is configured to allow the user to reserve a specific time point and start the AC to DC power supply module 41 by itself. Without manual operation, the logistics vehicle 31 is pre-cooled. For example: set between 1:00 and 5:00 in the morning, the reservation timing circuit 46 activates the AC-to-DC power supply module 41 by itself. Without the need for manual operation, the AC-to-DC power supply module 41 can supply power and drive electric compression. Machine 48. The reservation timing circuit 46 can be arranged in accordance with user instructions or according to the temperature information of the cargo compartment 63. The power supply sequence of the first 43 and 44 is, for example: the departure time of the A logistics vehicle is earlier than that of the B logistics vehicle, so the reservation timing circuit 46 first pre-cools the A logistics vehicle; or the temperature of the cargo compartment of the A logistics vehicle is higher than that of the B logistics vehicle. The cargo compartment temperature is high, so the reservation timing circuit 46 performs pre-cooling of the A logistics vehicle first.

In one embodiment, the charging device 42 further includes a display, which allows the user to know the power information and the temperature information of the cargo compartment 63. In one embodiment, the charging device 42 further includes a water cooling system, which is capable of cooling the power conversion circuit 45. In one embodiment, the charging device 42 may be equipped with wheels to allow the charging device 42 to move to a position where the logistics vehicle 31 is parked.

In one embodiment, the control box 61 is disposed on the logistics vehicle 31. The control box 61 is coupled to the plug interface 62, the electric compressor 48, and the vehicle circuit 64. The electric compressor 48 is connected in parallel with the on-vehicle compressor 65. Specifically, the electric compressor 48 and the refrigerant pipeline 66 of the on-vehicle compressor 65 are connected in parallel. The vehicle circuit 64 is an existing motor control circuit on a logistics vehicle. The plug interface 62 is matched with the plugs 43 and 44. The plug interface 62 can receive the high-voltage electric compressor 48 and the plug interface 62 can receive the low-voltage electricity for the control box 61 or other air-conditioning electrical systems. The plug interface 62 can also receive or output control signals. The radiator 67 is located outside the cargo compartment 63, and the evaporator 68 is located inside the cargo compartment 63. The refrigerant circuit 66 connects the electric compressor 48, the vehicle-mounted compressor 65, the radiator 67, and the evaporator 68 to form a refrigerant circuit.

In one embodiment, this case mainly provides or sells a control box 61 and an AC-to-DC power supply module 41, see FIG. 2. Control box 61 assembled in logistics On the vehicle 31, the AC-to-DC power supply module 41 is placed outside the logistics vehicle 31. The control box 61 is configured to be coupled to the plug interface 62. The control box 61 also includes a control and protection circuit 72 (as shown in FIG. 3), which is used to prevent the engine of the logistics vehicle 31 from starting when the cargo compartment 63 of the logistics vehicle 31 is pre-cooled. The AC to DC power supply module 41 further includes a charging device 42, and a plurality of plugs 43 and 44 are coupled to the charging device 42. The plurality of plugs 43 and 44 are matched with the plug interface 62.

In actual operation, the user inserts the plug 43 or plug 44 into the plug interface 62 in advance, and through the AC and DC power supply module 41 that can be scheduled and reserved, for example, the pre-cooling time is set in the early morning, and the cargo is loaded in the cargo hold. Before 63. At a preset pre-cooling time, the reservation timing circuit 46 activates the AC to DC power supply module 41 by itself, and the power conversion circuit 45 converts the AC power of the external power source 51 into DC power, and the DC power is transmitted to the plug interface through the plugs 43 and 44 and the wire 47 62, in which the plug interface 62 receives high-voltage DC power to use the compressor 48, and the plug interface 62 receives low-voltage power for the control box 61 or other air-conditioning electric systems. Further, the control box 61 will be switched by the on-board compressor 65 to be operated by the electric compressor 48. In other words, the pre-cooling period of the on-board compressor 65 is in a standby or stopped state. In one embodiment, the control box 61 transmits and turns off the vehicle. The compressor 65 instructs the vehicle circuit 64, and the vehicle circuit 64 further executes an action of turning off the vehicle-mounted compressor 65. In one embodiment, the control box 61 sends an opening command to the electric compressor 48 so that the electric compressor 48 compresses the refrigerant during the pre-cooling period. In particular, the circuit configuration of the control box 61, such as a switcher, multiplexer, etc., enables the AC to DC power supply module 41 to directly drive electric compression Machine 48, instead of using a battery to store electrical energy, is used to reduce the weight load of the battery in the logistics vehicle 31 and increase the cargo weight and space of the logistics vehicle 31. In particular, during the pre-cooling period, the control box 61 restricts the engine start of the logistics vehicle 31 and does not use the engine to drive the vehicle compressor 65 to compress the refrigerant. The control box 61 executes the shutdown instruction through the vehicle circuit 64 or directly shuts down the vehicle. Compressor 65 and other methods, so that the engine of the logistics vehicle 31 will not be started by mistake during the pre-cooling period, thereby allowing the refrigerant circuit of the electric compressor 48, the radiator 67 and the evaporator 68 to operate normally, and protecting the machinery of the logistics vehicle 31 The device and the AC to DC power supply module 41 prevent the plugs 43 and 44 and the electric wires 47 from being torn. In this way, during the pre-cooling process of the cargo tank 63, it is not necessary to start the engine of the logistics vehicle 31 to solve the problems of air pollution in the semi-enclosed space and the deterioration of fuel consumption caused by the idle speed of the engine, while reducing the fuel cost of the logistics vehicle 31. The engine consumption of the logistics vehicle 31 can also be reduced, and the effect of energy saving and carbon reduction can be achieved. During the pre-cooling period, the electric compressor 48 sucks in the low-temperature and low-pressure gaseous refrigerant from the evaporator 68. The electric compressor 48 compresses the gaseous refrigerant to increase its temperature and pressure, and sends the gaseous refrigerant to the radiator 67 to make the gaseous refrigerant It turns into a liquid refrigerant, and the liquid refrigerant enters the evaporator 68, and the evaporator 68 absorbs heat in the cargo compartment 63, so that the temperature in the cargo compartment 63 decreases. When the pre-cooling is completed, the AC-to-DC power supply module 41 stops the power supply by itself and reminds the user that the pre-cooling process of the cargo compartment 63 has been completed. The control box 61 switches the current operation mode of the electric compressor 48 to the operation of the vehicle compressor 65. Mode, and the control box 61 lifts the start restriction of the engine of the logistics vehicle 31. The user can start the engine of the logistics vehicle 31 normally, and let the engine drive the on-board compressor 65 to provide The cooling effect keeps the temperature of the cargo hold 63 during transportation.

FIG. 3 is a circuit diagram illustrating the control box 61 according to some embodiments. The control box 61 includes a power conversion circuit 71, a control and protection circuit 72, a signal output circuit 73, and a signal input circuit 74. The power conversion circuit 71 is constituted by a DC / DC converter. The control and protection circuit 72 is composed of a microcontroller or a suitable automotive chip. In one embodiment, the control and protection circuit 72 mainly uses a CAN BUS (Controller Area Network) as a transmission protocol. The signal output circuit 73 and the signal input circuit 74 are composed of an input / output circuit (I / O circuit), such as an I / O interface chip or an I / O interface control card.

The power conversion circuit 71 is respectively coupled to the input and output terminals 72-3, 73-1, and 74-1 of the control and protection circuit 72, the signal output circuit 73, and the signal input circuit 74, as shown by arrows 76, 77, and 78. The power conversion circuit 71 is configured to convert the vehicle power supply control box 61 of the logistics vehicle 31 or allocate external power (such as an AC to DC power supply module 41) to the control box 61 for use. The arrows 76, 77, and 78 represent transmitting power to the control and protection circuit 72, the signal output circuit 73, and the signal input circuit 74. The signal input circuit 74 is coupled to the input terminal 72-1 of the control and protection circuit 72. The transmission direction is shown by arrow 79. The signal input circuit 74 is used to detect whether the plugs 43, 44 (charging guns) are connected to the logistics vehicle 31. The signal output circuit 73 is coupled to the output terminal 72-2 of the control and protection circuit 72. The transmission direction is shown as arrow 80. The signal output circuit 73 is used to switch between the electric compressor 48 of the logistics vehicle 31 and the on-board compressor 65.

In one embodiment, the control and protection circuit 72 is configured to restrict or prohibit the engine of the logistics vehicle 31 from starting during the pre-cooling period of the cargo compartment 63, as shown in step 81. The control and protection circuit 72 receives the message that the cargo compartment 63 enters the pre-cooling process, and further issues a command to limit the engine start to the vehicle circuit 64, or directly inhibits the on-vehicle compressor 65 from turning on via the command and signal. In addition, the control and protection circuit 72 is configured to control the cooling speed, as shown in step 82. The control and protection circuit 72 receives the instantaneous temperature of the cargo compartment 63, and actively adjusts the compression efficiency or rotation speed (Revolution (s) Per Minute, RPM) of the electric compressor 48 according to the instantaneous temperature, or by issuing a command to adjust the electric compression Speed of machine 48. For example: increase the compression efficiency or rotation speed of the electric compressor 48, so that the logistics vehicle 31 can reach the required refrigerating and freezing temperature in a short time; the instant temperature of the cargo compartment 63 is close to a preset temperature, and the control and protection circuit 72 is gradually reduced The compression efficiency or rotation speed of the electric compressor 48.

In one embodiment, the signal input circuit 74 is configured to determine whether the plugs 43 and 44 (charging guns) are successfully connected to the plug interface 62 of the logistics vehicle 31. As shown in step 83, the signal input circuit 74 receives voltage, current, or The signal of the load resistance determines whether the plugs 43 and 44 (charging guns) are connected smoothly to avoid the danger of leakage. In addition, the signal input circuit 74 is configured to judge whether the pre-cooling process for refrigerating or freezing is completed. As shown in step 84, the signal input circuit 74 receives the temperature information of the cargo compartment 63, and uses the temperature information to determine whether the temperature of the cargo compartment 63 has reached a Preset temperature. If the temperature of the cargo tank 63 has reached the preset temperature, a command to complete the pre-cooling process is sent to the control and protection circuit 72, which will be completed. The pre-cooled message is fed back to the control and protection circuit 72.

In one embodiment, the signal output circuit 73 is configured to switch between the electric compressor 48 and the on-vehicle compressor 65, as shown in step 85. During the pre-cooling period, the signal output circuit 73 issues a switching command or a direct control mode to switch the operation of the on-board compressor 65 to the operation of the electric compressor 48, and the electric compressor 48 compresses the refrigerant; after the pre-cooling is completed, The signal output circuit 73 switches the operation by the electric compressor 48 to the operation by the vehicle-mounted compressor 65, and the vehicle-mounted compressor 65 compresses the refrigerant.

In one embodiment, as shown in FIGS. 2 and 3, the present case mainly provides or sells a control box 61 for a pre-cooling system of a cargo compartment of a logistics vehicle. The control box 61 is installed in the logistics vehicle 31. The actual circuit of the control box 61 includes: a control and protection circuit 72, which is used to restrict the start of the engine of the logistics vehicle 31 when the cargo compartment 63 of the logistics vehicle 31 is pre-cooled; a signal input circuit 74, which is coupled to the input terminal of the control and protection circuit 72 72-1, used to detect whether the charging gun or plug 43, 44 is connected to the logistics vehicle 31; signal output circuit 73, which is coupled to the output 72-2 of the control and protection circuit 72, for the electric compressor in the logistics vehicle 31 Switching between 48 and vehicle-mounted compressor 65; and power conversion circuit 71, respectively coupled to input terminal 72-3 of control and protection circuit 72, input terminal 74-1 of signal input circuit 74, and input terminal of signal output circuit 73 73-1, a vehicle power supply control box 61 for converting the logistics vehicle 31.

In the actual operation of the control box 61, when the pre-cooling is started, the power conversion circuit 71 allocates power from the AC to DC power supply module 41 or a vehicle power supply, supplies the power to the control box 61, and wakes up each power of the control box 61. road. The signal input circuit 74 determines whether the plugs 43 and 44 (charging guns) are smoothly connected to the plug interface 62 of the logistics vehicle 31, as shown in step 83. The signal output circuit 73 switches the operation by the on-vehicle compressor 65 to the operation by the electric compressor 48, as shown in step 85. The AC to DC power supply module 41 starts to supply power to the electric compressor 48. The electric compressor 48 compresses the refrigerant to pre-cool the cargo compartment 63. During the pre-cooling of the cargo compartment 63, the control and protection circuit 72 restricts or prohibits the engine of the logistics vehicle 31 from starting. As shown in step 81. In addition, the control and protection circuit 72 receives the instant temperature of the cargo compartment 63, and adjusts the compression efficiency or rotation speed of the electric compressor 48 according to the instant temperature, as shown in step 82. The signal input circuit 74 determines whether the pre-cooling process for refrigerating or freezing is completed, as shown in step 84. If the pre-cooling is completed, a message of completion of the pre-cooling is fed back to the control and protection circuit 72. The control and protection circuit 72 notifies the AC to DC power supply module 41 that the pre-cooling is completed, the AC to DC power supply module 41 stops supplying power to the electric compressor 48, and the AC to DC power supply module 41 notifies the user that the pre-cooling has been completed. When the user releases the plugs 43 and 44 or installs a self-releasing device, the signal output circuit 73 switches the operation by the electric compressor 48 to the operation by the on-vehicle compressor 65, as shown in step 85. The control and protection circuit 72 lifts the restriction of the engine start, the logistics vehicle 31 can be started, and the goods are transported. The engine is used to drive the on-board compressor 65 during the transportation to provide refrigeration for the cargo compartment 63 during the transportation and keep the temperature low during the transportation. effect.

FIG. 4 is a device diagram illustrating an AC-to-DC power supply module 91 according to some embodiments. The AC to DC power supply module 91 includes a charging device 92, The plugs 93, 94, 95 and the electric wire 96 are connected to the charging device 92 through the electric wires 96. The charging device 92 includes a power conversion circuit 97 and a reservation timing circuit 98. The AC to DC power supply module 91 is electrically connected to an external power source 86 and converts AC power to DC power through a power conversion circuit 97. The reservation timing circuit 98 allows the user to make a reservation at a specific time point to start the AC-to-DC power supply module 91 on his own and start pre-cooling the logistics vehicles 87, 88, and 89. In addition, the reservation timing circuit 98 can arrange the power supply order of the plugs 93, 94, and 95 according to user instructions or according to the cargo compartment temperature information of the logistics vehicles 87, 88, and 89. For example, for higher temperature cargo compartments, priority is given to Pre-cooling program. The detailed structure of each device is the same as that of the embodiment in FIG. In particular, the AC-to-DC power supply module 91 series can simultaneously power multiple logistics vehicles 87, 88, and 89. In particular, the AC-to-DC power supply module 91 series can drive multiple electric compressors for one-to-many Pre-cooling program, which saves pre-cooling time and equipment costs. In an embodiment, the power conversion circuit 97 is configured to independently control the output power of each plug of the plugs 93, 94, and 95, and provides DC units of voltage and current in different units to the logistics vehicles 87, 88, and 89. In other words, the plugs 93, 94, and 95 The output powers of 94 and 95 are independent of each other. In one embodiment, the power conversion circuit 97 is configured to provide + 12V DC power to the electric systems of the logistics vehicles 87, 88, and 89, or to charge the vehicle batteries (not the batteries used in refrigeration and freezing systems, but general vehicles). Battery). In particular, the step of converting AC power to DC power is performed outside the logistics vehicles 87, 88, 89, so that there is no need to additionally assemble an AC to DC circuit inside the logistics vehicles 87, 88, 89 to reduce costs. Furthermore, it is powered by AC to DC The module 91 directly drives the electric compressors of the logistics vehicles 87, 88, and 89. The logistics vehicles 87, 88, and 89 do not need to be reassembled to the batteries used in the refrigeration system, which reduces the load weight of the logistics vehicles 87, 88, and 89, and improves Loadable weight.

5 is a flowchart illustrating a method 120 for pre-cooling a cargo compartment of a logistics vehicle according to some embodiments. This case provides a method 120 for pre-cooling the cargo compartment of a logistics vehicle, including: step 121 (refer to FIG. 2), switching between the electric compressor 48 and the vehicle-mounted compressor 65 in the logistics vehicle 31, and switching to pre-cooling by the electric compressor 48 Step 122: from the outside of the logistics vehicle 31, power is automatically supplied to the electric compressor 48 at a preset time; step 123, one of the engines of the logistics vehicle 31 is prohibited from starting; step 124, the cargo compartment 63 of the pre-cooled logistics vehicle 31 reaches A preset temperature; step 125, and stopping driving the electric compressor 48. The method 120 for pre-cooling the cargo compartment of the logistics vehicle further includes: monitoring an instant temperature of one of the cargo compartments 65 during the pre-cooling period; and adjusting a rotational speed of one of the electric compressors 48 based on the instant temperature. The method 120 for pre-cooling the cargo compartment of a logistics vehicle further includes: driving a plurality of electric compressors according to a preset power supply sequence. The method 120 for pre-cooling the cargo compartment of the logistics vehicle further includes detecting whether the electric compressor 48 receives automatic power supply. The method 120 for pre-cooling the cargo compartment of the logistics vehicle further includes switching to cooling by the on-board compressor 65.

To sum up, the case is configured through the control box during the pre-cooling period to limit the start of the logistics vehicle engine, and to achieve the switch between the electric compressor and the on-board compressor pressure; through the AC to DC power supply module with reservation timing function and sequencing function, At the same time power and drive the electric compressor of at least one logistics vehicle. Achieve the effect of pre-cooling the cargo compartment without starting the logistics vehicle engine Effectiveness, in order to solve the problems of air pollution, waste heat and fuel consumption caused by engine cooling during the indoor stacking process of refrigerated home furnishings, and to make the dispatching more flexible.

In some embodiments, the plug interface is electrically coupled to an electric compressor.

In some embodiments, the AC-to-DC power supply module is used to directly drive the electric compressor when the cargo hold is pre-cooled.

In some embodiments, the control box further includes a signal output circuit for switching between the electric compressor and a vehicle-mounted compressor.

In some embodiments, the signal output circuit is used to switch the electric compressor to operate when the cargo hold is pre-cooled.

In some embodiments, the control and protection circuit is configured to receive an instant temperature of the cargo hold and determine the degree of pre-cooling.

In some embodiments, the control and protection circuit is used to adjust the rotation speed of an electric compressor according to the instant temperature of the cargo hold.

In some embodiments, the control box further includes a signal input circuit for detecting whether one of the plurality of plugs is electrically connected to the plug interface.

In some embodiments, the control box further includes a power conversion circuit connected to a vehicle power supply for converting the vehicle power supply to the control unit. Making box.

In some embodiments, the AC-to-DC power supply module further includes a reservation timing circuit located in the charging device, for automatically activating the AC-to-DC power supply module at a preset time point to pre-cool the cargo hold.

In some embodiments, the reservation timing circuit is used to arrange the power supply sequence of the plurality of plugs.

In some embodiments, the AC-to-DC power supply module further includes an AC-to-DC circuit in the charging device for converting AC power to DC power.

In some embodiments, the control and protection circuit is used to adjust a speed of the electric compressor according to an instant temperature of the cargo hold.

In some embodiments, the signal input circuit is used to feed back to the control and protection circuit a message that the cargo hold has reached a preset temperature.

In some embodiments, the method for pre-cooling the cargo compartment of a logistics vehicle includes: monitoring an instant temperature of one of the cargo compartments; and adjusting a rotational speed of the electric compressor according to the instant temperature.

In some embodiments, the method for pre-cooling the cargo compartment of a logistics vehicle includes: driving a plurality of electric compressors according to a preset power supply sequence.

In some embodiments, the method for pre-cooling the cargo compartment of a logistics vehicle includes detecting whether the electric compressor receives the automatic power supply.

In some embodiments, the method for pre-cooling the cargo compartment of a logistics vehicle includes switching to cooling by an on-board compressor.

The foregoing outlines the features of some embodiments, so that those skilled in the art may better understand the aspects disclosed in this application. Those skilled in the art should understand that the disclosure of this application can be easily used as a basis for designing or modifying other processes and structures to achieve the same purpose and / or achieve the same advantages as the embodiments described in this application. Those familiar with this technology should also understand that this equal structure does not depart from the spirit and scope of the disclosure of this application, and that those skilled in this technology can make various changes, substitutions and substitutions without departing from the spirit and scope of this disclosure. range.

Claims (19)

A pre-cooling system for a cargo compartment of a logistics vehicle includes a control box located on a logistics vehicle and coupled to a plug interface. The control box also includes a control and protection circuit for a cargo compartment of the logistics vehicle during pre-cooling. To prevent an engine of the logistics vehicle from starting, wherein the plug interface is electrically coupled to an electric compressor; and an AC to DC power supply module is located outside the logistics vehicle, and the AC to DC power supply module also includes a charging device And a plurality of plugs coupled to the charging device, wherein when the cargo compartment is pre-cooled, the AC to DC power supply module directly drives the electric compressor for cooling; wherein the plurality of plugs are matched with the plug interface The AC-to-DC power supply module further includes: a reservation timing circuit is located in the charging device for automatically starting the AC-to-DC power supply module at a preset time point to pre-cool the cargo hold. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 1, wherein the control box further includes: a signal output circuit for switching between an electric compressor and an on-board compressor. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 2, wherein the refrigerant pipeline of the electric compressor is connected in parallel with the refrigerant pipeline of the on-board compressor. The pre-cooling system for the cargo compartment of a logistics vehicle as described in claim 2, wherein the signal output circuit is used to switch to the electric compressor for operation when the cargo compartment is pre-cooled. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 1, wherein the control and protection circuit is used to receive an instant temperature of one of the cargo compartments to determine the degree of pre-cooling. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 5, wherein the control and protection circuit is used to adjust a rotation speed of the electric compressor according to the instant temperature of the cargo compartment. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 1, wherein the control box further includes: a signal input circuit for detecting whether one of the plurality of plugs is electrically connected to the plug interface. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 1, wherein the control box further includes: a power conversion circuit connected to a vehicle power supply for converting the vehicle power supply to the control box. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 1, wherein the reservation timing circuit is used to arrange the power supply sequence of the plurality of plugs. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 1, wherein the AC-to-DC power supply module further includes: an AC-to-DC circuit located in the charging device for converting AC power to DC power. A precooling system for the cargo compartment of a logistics vehicle. The precooling system for the cargo compartment of a logistics vehicle includes: a plug interface located on a logistics vehicle; an AC-to-DC power supply module located outside the logistics vehicle; the AC-to-DC power supply module Containing a charging device and a reservation timing circuit, the reservation timing circuit is located in the charging device; an electric compressor is located on the logistics vehicle and the plug interface is electrically coupled to the electric compressor; and a control box is located on the logistics vehicle In which, the control box is coupled to the electric compressor and the plug interface, and the control box further includes: a control and protection circuit for restricting the start of an engine of the logistics vehicle when a cargo compartment of the logistics vehicle is pre-cooled; A signal input circuit is coupled to an input terminal of the control and protection circuit to detect whether a charging gun is connected to the logistics vehicle; a signal output circuit is coupled to an output terminal of the control and protection circuit to perform Switching between the electric compressor and an on-board compressor in the logistics vehicle; and a power conversion circuit that is coupled to another output of the control and protection circuit, respectively Terminal, an input terminal of the signal input circuit, and an input terminal of the signal output circuit, which are used to convert a vehicle power supply of the logistics vehicle to supply the control box; wherein during the pre-cooling, the signal output circuit turns on the An electric compressor, and the control and protection circuit shuts down the engine, causing the on-board compressor to stop, an external power source is configured to be coupled to the AC to DC power supply module, and the reservation timing circuit starts the The AC-to-DC power supply module supplies DC power, and the external power supplies the DC power to the electric compressor through the charging gun and the plug interface, directly drives the electric compressor, and pre-cools the cargo compartment. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 11, wherein the control and protection circuit is used to adjust a speed of the electric compressor according to an instant temperature of the cargo compartment. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 11, wherein the signal input circuit is used to feed back to the control and protection circuit a message that the cargo compartment has reached a preset temperature. The pre-cooling system for the cargo compartment of a logistics vehicle according to claim 11, wherein the refrigerant pipeline of the electric compressor is connected in parallel with the refrigerant pipeline of the on-board compressor. A method for pre-cooling the cargo compartment of a logistics vehicle. The method for pre-cooling the cargo compartment of a logistics vehicle includes: switching between an electric compressor and an on-board compressor in a logistics vehicle to switch to pre-cooling by the electric compressor; An AC-to-DC power supply module located outside the logistics vehicle converts an AC power to the DC power required by the electric compressor; a reservation timing circuit of the AC-to-DC power supply module automatically performs a preset time at a preset time Start the AC to DC power supply module and automatically supply the DC power to the electric compressor, where the AC to DC power supply module directly drives the electric compressor; one of the engines of the logistics vehicle is prohibited from starting, so that the on-board compressor stops cooling ; Pre-cooling a cargo compartment of the logistics vehicle to a preset temperature; and stopping driving the electric compressor. The method for pre-cooling the cargo compartment of a logistics vehicle according to claim 15, the method for pre-cooling the cargo compartment of the logistics vehicle comprises: monitoring an instant temperature of the cargo compartment; and adjusting a speed of one of the electric compressors according to the instant temperature. The method for pre-cooling the cargo compartment of a logistics vehicle according to claim 15, the method for pre-cooling the cargo compartment of the logistics vehicle includes driving a plurality of electric compressors according to a preset power supply sequence. The method for pre-cooling the cargo compartment of a logistics vehicle according to claim 15, the method for pre-cooling the cargo compartment of the logistics vehicle includes detecting whether the electric compressor receives the automatic power supply. The method for pre-cooling the cargo compartment of a logistics vehicle according to claim 15, the method for pre-cooling the cargo compartment of the logistics vehicle includes switching to refrigeration by the on-board compressor.