Automotive top-mounted standby power module and refrigerator car

Abstract

The utility model belongs to the technical field of refrigeration, and discloses an automotive top-mounted standby power module and a refrigerator car, the automotive top-mounted standby power module comprises a frame, a power supply module, a driving module and a shell, and the frame is used for being installed at the top of a car body; the power module is mounted on the frame; the driving module comprises a standby compressor and a gas-liquid separator, and the shell covers the power module and the driving module and is detachably connected with the frame; wherein the power supply module is horizontally arranged on the frame, the standby compressor is configured to be a horizontal inverter compressor, and the gas-liquid separator is configured to be a horizontal separator. The main components of the automotive top-mounted standby power module are all of a horizontal structure, so that the overall height of the driving module is greatly reduced while normal use of the automotive top-mounted standby power module is guaranteed, and the height limiting requirement of urban distribution of a refrigerator car is met.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a vehicle-mounted top-mounted power supply module and a refrigerated truck. Background Art

[0002] With the increasing emphasis on food safety and the freshness of food materials, the market share of cold chain logistics vehicles has gradually expanded, and at the same time, the demand for bread refrigerated trucks for urban distribution has also increased day by day. Since bread refrigerated trucks are used for urban distribution, in order to ensure the vehicle's cruising range, the refrigerated truck needs to use a power supply module for refrigeration during pre-cooling and waiting. The traditional power supply module is large in size and weight and is installed on the vehicle chassis. Due to the problem of the chassis height of the bread refrigerated truck, the available installation space is extremely limited, which is not only inconvenient for assembly, but also difficult to maintain and repair the power supply module installed under the chassis; when installed on the top of the vehicle, it is easy to cause the vehicle to not meet the height limit requirements for urban distribution, affecting the normal use of the bread refrigerated truck. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a vehicle-mounted top-mounted power supply module and a refrigerated truck, which have a compact structure, are simple to assemble and convenient to maintain, and meet the height limit requirements for urban distribution.

[0004] To achieve this purpose, the utility model adopts the following technical solutions: The vehicle-mounted top-mounted power supply module includes a frame, a power supply module, a drive module and a housing. The frame is used for installation on the top of the vehicle body; the power supply module is installed on the frame; the drive module is installed on the frame and is located on one side of the power supply module. The drive module includes a standby compressor and a gas-liquid separator. The standby compressor is connected to the power supply module and is connected to the gas-liquid separator through a return pipe; the housing covers the power supply module and the drive module and is detachably connected to the frame; wherein, the power supply module lies horizontally on the frame, the standby compressor is configured as a horizontal variable-frequency compressor, and the gas-liquid separator is configured as a horizontal separator.

[0005] Preferably, the standby compressor is provided with a first inlet and a first outlet. The first inlet and the first outlet are respectively arranged on the side wall of the standby compressor, and the center lines of the first inlet and the first outlet are both parallel to the horizontal plane; the gas-liquid separator is provided with a second inlet and a second outlet. The second inlet and the second outlet are respectively arranged on the side wall of the gas-liquid separator, and the center lines of the second inlet and the second outlet are both parallel to the horizontal plane. The second outlet is connected to the first inlet through the return pipe.

[0006] Preferably, a first support member is provided between the standby compressor and the gas-liquid separator. An air outlet pipe is connected to the first outlet, and one end of the air outlet pipe away from the first outlet is mounted on the first support member. The frame is provided with a through slot which penetrates the frame in the vertical direction and is located below the first support member; and / or, a three-way elbow is provided between the return air pipe and the second outlet. The inlet of the three-way elbow is connected to the second outlet, one outlet of the three-way elbow is connected to the return air pipe, and the other outlet is mounted on the first support member.

[0007] Preferably, a second support member is mounted on the frame. The second support member is provided with a positioning hole, and one end of the three-way elbow connected to the return air pipe penetrates through the positioning hole.

[0008] Preferably, the return air pipe and the air outlet pipe are arranged at intervals in the vertical direction.

[0009] Preferably, the power supply module includes a rectifier and a DC voltage converter. The rectifier is connected to the DC voltage converter, the DC voltage converter is connected to the standby compressor, and heat dissipation fins are provided on the outer peripheral wall of the DC voltage converter.

[0010] Preferably, a waterproof box is connected to the frame, and the rectifier is accommodated in the waterproof box.

[0011] Preferably, the frame is provided with a flanging portion that turns upwards. The flanging portion surrounds the frame. A clamping groove is provided at the bottom end of the outer shell. The flanging portion and the clamping groove are clamped and bolted to the side wall of the clamping groove.

[0012] Another object of the present invention is to provide a refrigerated truck, which includes a vehicle body and the above-mentioned vehicle-mounted top-mounted power supply module, and the vehicle-mounted top-mounted power supply module is mounted on the top end of the vehicle body.

[0013] Preferably, the refrigerated truck further includes a refrigeration system. The refrigeration system includes a main compressor, a top-mounted refrigeration external machine, and a refrigeration internal machine. The main compressor is drivingly connected to the engine of the vehicle body, and the main compressor is respectively connected to the top-mounted refrigeration external machine and the refrigeration internal machine. The vehicle-mounted top-mounted power supply module is respectively connected to the top-mounted refrigeration external machine and the refrigeration internal machine to form a standby refrigeration system.

[0014] Advantages of the present utility model: The power module and the drive module adopt modular design and are installed on the top of the refrigerated truck. They have a compact structure and are convenient for maintenance. The standby compressor of the drive module is configured as a horizontal variable-frequency compressor, and the gas-liquid separator is configured as a horizontal separator. The main components all adopt horizontal structures. While ensuring the normal use of the vehicle-mounted top-mounted power supply module, the overall height of the drive module is significantly reduced, thereby reducing the height of the housing covering the power module and the drive module. After the vehicle-mounted top-mounted power supply module is installed on the top of the bread refrigerated truck, its height is less than the height of the top-mounted refrigeration external unit of the original refrigeration system, meeting the height limit requirements for in-city distribution of refrigerated trucks.

[0015] The present utility model also provides a refrigerated truck. The power module and the drive module of the vehicle-mounted top-mounted power supply module adopt modular design and are installed on the top of the refrigerated truck. They have a compact structure and are convenient for maintenance. The standby compressor of the drive module is configured as a horizontal variable-frequency compressor, and the gas-liquid separator is configured as a horizontal separator. The main components all adopt horizontal structures. While ensuring the normal use of the vehicle-mounted top-mounted power supply module, the overall height of the drive module is significantly reduced, thereby reducing the height of the housing covering the power module and the drive module. After the vehicle-mounted top-mounted power supply module is installed on the top of the bread refrigerated truck, the height of the vehicle-mounted top-mounted power supply module is less than the height of the top-mounted refrigeration external unit of the original refrigeration system, avoiding an increase in the height of the refrigerated truck and meeting the height limit requirements for in-city distribution of refrigerated trucks. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the vehicle-mounted top-mounted power supply module of the present utility model;

[0017] Figure 2 is an installation schematic diagram of the vehicle-mounted top-mounted power supply module of the present utility model.

[0018] In the figure:

[0019] 1000, vehicle-mounted top-mounted power supply module;

[0020] 100, frame; 110, first support member; 120, through groove; 130, second support member; 140, flanging part;

[0021] 200, power module; 210, DC voltage converter; 211, heat dissipation fins; 220, waterproof box; 221, box cover;

[0022] 300, drive module; 310, standby compressor; 311, first inlet; 312, first outlet; 320, gas-liquid separator; 321, second inlet; 322, second outlet; 323, three-way elbow; 330, return air pipe; 340, air outlet pipe;

[0023] 400, housing;

[0024] 2000, vehicle body;

[0025] 500, refrigeration system; 510, main compressor; 520, overhead refrigeration external unit; 530, refrigeration internal unit. Detailed implementation mode

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0027] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0029] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] Refer to Figure 1 (The outer shell 400 is omitted) and Figure 2As shown in the figure, a vehicle-mounted top-mounted power backup module 1000 provided by an embodiment of the present utility model includes a frame 100, a drive module 300, and a housing 400. Optionally, the frame 100 is made of high-strength aluminum alloy. The frame 100 is generally rectangular, and a power module 200 is installed on one side of the rectangular frame 100.

[0031] The drive module 300 is installed on the frame 100 and is located on one side of the power module 200, that is, the drive module 300 is installed on the other half of the rectangular frame 100. The drive module 300 includes a standby compressor 310 and a gas-liquid separator 320. The standby compressor 310 is connected to the power module 200 and is connected to the gas-liquid separator 320 through a return air pipe 330. The power module 200 can convert external mains power into a regulated power supply for the operation of the standby compressor 310.

[0032] The housing 400 matches the frame 100. The housing 400 covers the power module 200 and the drive module 300 and is detachably connected to the frame 100.

[0033] Among them, the power module 200 lies horizontally on the frame 100. The standby compressor 310 is configured as a horizontal variable-frequency compressor, and the gas-liquid separator 320 is configured as a horizontal separator. Specifically, the horizontal variable-frequency compressor is a horizontal aluminum-shell variable-frequency scroll compressor. The total height of the housing 400 and the frame 100 in the vertical direction (i.e., the distance from the top surface of the housing 400 to the top surface of the refrigerated truck) is less than or equal to the height of the top-mounted refrigeration external unit 520 of the original refrigeration system 500 of the refrigerated truck.

[0034] It can be understood that the power module 200 and the drive module 300 adopt a modular design and are respectively installed on one side of the frame 100, which is convenient for installation and has a compact structure. The vehicle-mounted top-mounted power backup module 1000 is installed at the top of the refrigerated truck, with simple assembly and convenient maintenance. The standby compressor 310 of the drive module 300 is configured as a horizontal variable-frequency compressor, the gas-liquid separator 320 is configured as a horizontal separator, and the power module 200 also lies horizontally on the frame 100. The main components of the vehicle-mounted top-mounted power backup module 1000 all adopt a horizontal structure. While ensuring the normal use of the vehicle-mounted top-mounted power backup module 1000, the overall height of the drive module 300 is greatly reduced, and then the height of the housing 400 covering the power module 200 and the drive module 300 is reduced. After the vehicle-mounted top-mounted power backup module 1000 is installed on the top of the bread refrigerated truck, its height is less than the height of the top-mounted refrigeration external unit 520 of the original refrigeration system 500, meeting the height limit requirements for in-city distribution of refrigerated trucks.

[0035] In addition, for traditional backup power modules, a stronger iron frame 100 is required to be stably hoisted on the chassis. However, the frame 100 in this application is made of high-strength aluminum alloy, which can significantly reduce the weight of the backup power module and further increase the cruising range of the bread refrigerated truck. Moreover, the standby compressor 310 is configured as a horizontal aluminum shell variable frequency scroll compressor, which not only operates with less noise, but also allows users to control the standby compressor 310 to start from zero speed or low speed through the vehicle-mounted unit assembly, gradually increasing the load to achieve a slow start. This avoids the problems of difficult start-up and unstable operation in areas with low or unstable voltage when the traditional backup power module starts directly at full load.

[0036] Referring to Figure 1 As shown, it can be understood that the standby compressor 310 is provided with a first inlet 311 and a first outlet 312. The first inlet 311 and the first outlet 312 are respectively arranged on the side wall of the standby compressor 310. Specifically, the first inlet 311 is arranged on the side of the standby compressor 310 away from the power module 200, and the first outlet 312 is arranged on the side of the standby compressor 310 away from the gas-liquid separator 320. And the center lines of the first inlet 311 and the first outlet 312 are both parallel to the horizontal plane.

[0037] The gas-liquid separator 320 is provided with a second inlet 321 and a second outlet 322. The second inlet 321 and the second outlet 322 are respectively arranged on the side wall of the gas-liquid separator 320. Specifically, due to the cylindrical shape of the gas-liquid separator 320, the second inlet 321 and the second outlet 322 can be respectively arranged on the two end faces of the gas-liquid separator 320, and the center lines of the second inlet 321 and the second outlet 322 are both parallel to the horizontal plane. The second outlet 322 is connected to the first inlet 311 through a return pipe 330.

[0038] The first inlet 311 and the first outlet 312 of the standby compressor 310 are horizontally arranged on the side wall of the standby compressor 310, and at the same time, the second inlet 321 and the second outlet 322 of the gas-liquid separator 320 are horizontally arranged on the side wall of the gas-liquid separator 320, avoiding the problem that the subsequent pipelines need to be connected above the variable frequency compressor and the horizontal gas-liquid separator 320, resulting in a passive increase in the height of the drive module 300 when the inlets and outlets of the traditional horizontal variable frequency compressor and the horizontal gas-liquid separator 320 are arranged upward or obliquely upward. This enables the return pipe 330 and other subsequent pipelines to be connected or disconnected from the side walls of the variable frequency compressor and the horizontal gas-liquid separator 320, ensuring that the first inlet 311, the first outlet 312, the second inlet 321, the second outlet 322, and each pipeline do not affect the height of the drive module 300.

[0039] Referring to Figure 1As shown, it can be understood that the standby compressor 310 and the gas-liquid separator 320 are spaced apart. A first support member 110 is provided between the standby compressor 310 and the gas-liquid separator 320. The first support member 110 is a right-angled plate member installed on the frame 100. The first outlet 312 is connected to an air outlet pipe 340. A section of the air outlet pipe 340 connected to the first outlet 312 is bent and turned. The main body of the air outlet pipe 340 is located between the standby compressor 310 and the power module 200, so that one end of the air outlet pipe 340 away from the first outlet 312 is installed on the first support member 110. The frame 100 is provided with a through slot 120. The through slot 120 penetrates the frame 100 in the vertical direction and is located below the standby compressor 310, the support member and the gas-liquid separator 320.

[0040] By installing one end of the air outlet pipe 340 away from the first outlet 312 on the first support member 110 between the standby compressor 310 and the gas-liquid separator 320, it is ensured that the air outlet pipe 340 is accommodated within the housing 400 and will not penetrate the housing 400 to be connected to the original refrigeration system 500 of the refrigerated truck. The installation space around the standby compressor 310 and the gas-liquid separator 320 is reasonably utilized to accommodate and arrange the air outlet pipe 340, effectively improving the structural compactness of the vehicle-mounted top-mounted power supply module 1000.

[0041] By providing the through slot 120, various pipe fittings and wire harness connectors between the original refrigeration system 500 of the refrigerated truck and the drive module 300 can pass through the through slot 120 and enter the housing 400, and then be connected to the drive module 300, effectively improving the appearance neatness of the vehicle-mounted top-mounted power supply module 1000.

[0042] Preferably, the return air pipe 330 and the air outlet pipe 340 are spaced apart in the vertical direction, that is, one of the return air pipe 330 and the air outlet pipe 340 is located above the other. Specifically, the connection between the return air pipe 330 and the second outlet 322 is inclined downward so that the return air pipe 330 is located below the air outlet pipe 340, or the connection between the air outlet pipe 340 and the first outlet 312 is inclined downward so that the air outlet pipe 340 is located below the return air pipe 330.

[0043] Since the return air pipe 330 usually passes through the gap between the standby compressor 310 and the gas-liquid separator 320, and one end of the air outlet pipe 340 is installed on the first support member 110 between the standby compressor 310 and the gas-liquid separator 320, setting the return air pipe 330 and the air outlet pipe 340 to be spaced apart in the vertical direction can avoid interference between the return air pipe 330 and the air outlet pipe 340, affecting the installation and use of the drive module 300, and effectively improving the structural rationality of the drive module 300.

[0044] Continue to refer to Figure 1As shown, it can be understood that a T-shaped three-way elbow 323 is provided between the suction pipe 330 and the second outlet 322. The three-way elbow 323 has one inlet and two outlets. The inlet of the three-way elbow 323 is connected to the second outlet 322. One outlet of the three-way elbow 323 is connected to the suction pipe 330, and the other outlet is installed on the first support member 110 and connected to the main compressor 510 of the refrigerated truck.

[0045] By providing the three-way elbow 323, when the refrigerated truck is running, the main compressor 510 of the refrigeration system 500 starts to suck the refrigerant gas. When the refrigerated truck is parked, the standby compressor 310 starts to suck the refrigerant gas. The main compressor 510 and the standby compressor 310 share the same gas-liquid separator 320, and there is no need to separately set a gas-liquid separator 320 that cooperates with the main compressor 510, effectively reducing the operating cost of the refrigerated truck. In addition, the branch of the three-way elbow 323 and the outlet pipe 340 are installed on the same first support member 110, improving the space utilization rate of the drive module 300 and further improving the structural compactness of the drive module 300.

[0046] Preferably, the frame 100 is installed with a second support member 130. The second support member 130 is also a right-angled plate member installed on the frame 100. The second support member 130 is provided with a positioning hole, and one end of the three-way elbow 323 connected to the suction pipe 330 passes through the positioning hole.

[0047] By providing the second support member 130, the second support member 130 cooperates with the first support member 110 to fixedly install the two outlets of the three-way elbow 323, effectively improving the installation stability of the three-way elbow 323 and the overall structural stability of the drive module 300.

[0048] Refer to Figure 1 As shown, it can be understood that the power supply module 200 includes a rectifier and a DC voltage converter 210 (DC-DC module). The rectifier and the DC voltage converter 210 are connected. The rectifier is used to convert high-voltage mains electricity into direct current, and the DC voltage converter 210 is used to convert the direct current into a regulated power supply that can be used by the standby compressor 310. The DC voltage converter 210 is connected to the standby compressor 310. The outer peripheral wall of the DC voltage converter 210 is provided with heat dissipation fins 211. Specifically, there are a plurality of heat dissipation fins 211, and the heat dissipation fins 211 are arranged along the length direction of the DC voltage converter 210, and the plurality of heat dissipation fins 211 are spaced apart along the height direction and the width direction of the DC voltage converter 210.

[0049] The rectifier and the DC voltage converter 210 are separately provided, and heat dissipation fins 211 are provided on the outer wall of the DC voltage converter 210, replacing the coil and fan structure used in the traditional integrated power supply module 200, effectively reducing the height of the power supply module 200 and facilitating the assembly and use of the power supply module 200.

[0050] It should be noted that heat dissipation holes are provided on the side walls around the outer shell 400. The heat dissipation holes cooperate with the through grooves 120, which can effectively improve the heat dissipation efficiency of the vehicle-mounted top-mounted power supply module 1000, avoid heat accumulation inside the outer shell 400, and extend the service life of the vehicle-mounted top-mounted power supply module 1000.

[0051] Preferably, the frame 100 is connected with a waterproof box 220. The rectifier is accommodated in the waterproof box 220, and a detachable box cover 221 is provided at the top of the waterproof box 220.

[0052] Since heat dissipation holes are provided on the side walls around the outer shell 400, when the refrigerated truck operates in rainy days or in a humid environment, water vapor may enter the inside of the outer shell 400. By providing the waterproof box 220, it can protect the rectifier, avoid external water vapor from eroding the rectifier, and extend the service life of the vehicle-mounted top-mounted power supply module 1000.

[0053] It should be added that the waterproof box 220, the DC voltage converter 210, the standby compressor 310 and the gas-liquid separator 320 are respectively bolted to the frame 100. The length direction of the waterproof box 220 is usually perpendicular to the length direction of the DC voltage converter 210. The axis direction of the standby compressor 310 is perpendicular to the axis direction of the gas-liquid separator 320, and the waterproof box 220 and the standby compressor 310 are arranged at intervals, so that the shape of the frame 100 is closer to a square and the center of gravity of the vehicle-mounted top-mounted power supply module 1000 is closer to the center of the frame 100, further improving the structural rationality and appearance beauty of the vehicle-mounted top-mounted power supply module 1000 and facilitating the assembly and use of the vehicle-mounted top-mounted power supply module 1000.

[0054] It can be understood that the frame 100 is provided with a flanging part 140 that turns up. The flanging part 140 is arranged around the frame 100. A card slot is provided at the bottom end of the outer shell 400. The flanging part 140 is snap-fitted with the card slot and bolted to the side wall of the card slot.

[0055] By providing the flanging part 140, on the one hand, the frame 100 is snap-fitted and bolted to the outer shell 400 through the flanging part 140, effectively improving the structural stability of the vehicle-mounted top-mounted power supply module 1000; on the other hand, the flanging part 140 is inserted into the card slot, which can further reduce the total height of the frame 100 and the outer shell 400, and cooperate with the horizontal structure of the power module 200 and the drive module 300 to realize the ultra-thin design of the vehicle-mounted top-mounted power supply module 1000.

[0056] Refer to Figure 2As shown in the figure, the present utility model further provides a refrigerated truck, which includes a vehicle body 2000 and the above-mentioned vehicle-mounted top-mounted power supply module 1000. The vehicle body 2000 is provided with a refrigeration system 500. Specifically, the refrigeration system 500 includes a main compressor 510, a top-mounted refrigeration external machine 520 and a refrigeration internal machine 530. The main compressor 510 is located at the front part of the vehicle body 2000, and the main compressor 510 is drivingly connected to the engine in the vehicle body 2000. The top-mounted refrigeration external machine 520 is installed at the top of the vehicle body 2000, and the refrigeration internal machine 530 is installed on the inner top surface of the carriage of the vehicle body 2000. The vehicle-mounted top-mounted power supply module 1000 is installed at the top of the vehicle body 2000 and is located on one side of the top-mounted refrigeration external machine 520. The vehicle-mounted top-mounted power supply module 1000 is respectively connected to the top-mounted refrigeration external machine 520 and the refrigeration internal machine 530 to form a standby refrigeration system.

[0057] The refrigerated truck provided by the embodiment of the present utility model includes the vehicle-mounted top-mounted power supply module 1000 in the above embodiment. Therefore, the refrigerated truck provided by the embodiment of the present utility model also has the beneficial effects described in the above embodiment, which will not be elaborated here.

[0058] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limiting the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A vehicle-mounted overhead power backup module, characterized in that, Comprising: A frame (100) for installation on the top of a vehicle body; A power supply module (200) installed on the frame (100); A drive module (300) installed on the frame (100) and located on one side of the power supply module (200). The drive module (300) includes a standby compressor (310) and a gas-liquid separator (320). The standby compressor (310) is connected to the power supply module (200) and is connected to the gas-liquid separator (320) through a return air pipe (330); A housing (400) covering the outer periphery of the power supply module (200) and the drive module (300) and detachably connected to the frame (100); Wherein, the power supply module (200) lies horizontally on the frame (100), the standby compressor (310) is configured as a horizontal variable-frequency compressor, and the gas-liquid separator (320) is configured as a horizontal separator.

2. The vehicle-mounted overhead power backup module according to claim 1, wherein The standby compressor (310) is provided with a first inlet (311) and a first outlet (312). The first inlet (311) and the first outlet (312) are respectively arranged on the side wall of the standby compressor (310), and the center lines of the first inlet (311) and the first outlet (312) are both parallel to the horizontal plane; The gas-liquid separator (320) is provided with a second inlet (321) and a second outlet (322). The second inlet (321) and the second outlet (322) are respectively arranged on the side wall of the gas-liquid separator (320), and the center lines of the second inlet (321) and the second outlet (322) are both parallel to the horizontal plane. The second outlet (322) is connected to the first inlet (311) through the return air pipe (330).

3. The vehicle-mounted overhead power backup module according to claim 2, wherein, A first support member (110) is provided between the standby compressor (310) and the gas-liquid separator (320). The first outlet (312) is connected with an air outlet pipe (340). One end of the air outlet pipe (340) far from the first outlet (312) is installed on the first support member (110). The frame (100) is provided with a through groove (120) which penetrates the frame (100) in the vertical direction and is located below the first support member (110); And / or, a three-way elbow (323) is provided between the return air pipe (330) and the second outlet (322). The inlet of the three-way elbow (323) is connected to the second outlet (322). One outlet of the three-way elbow (323) is connected to the return air pipe (330), and the other outlet is installed on the first support member (110).

4. The vehicle-mounted overhead power backup module according to claim 3, characterized in that, The frame (100) is installed with a second support member (130). The second support member (130) is provided with a positioning hole. One end of the three-way elbow (323) connected to the return air pipe (330) passes through the positioning hole.

5. The vehicle-mounted overhead power backup module according to claim 3, characterized in that, The return air pipe (330) and the air outlet pipe (340) are arranged at intervals in the vertical direction.

6. The vehicle-mounted overhead power backup module according to any one of claims 1-5, characterized in that, The power supply module (200) includes a rectifier and a DC voltage converter (210). The rectifier is connected to the DC voltage converter (210), the DC voltage converter (210) is connected to the standby compressor (310), and heat dissipation fins (211) are provided on the outer peripheral wall of the DC voltage converter (210).

7. The vehicle-mounted overhead power backup module according to claim 6, wherein, A waterproof box (220) is connected to the frame (100), and the rectifier is accommodated in the waterproof box (220).

8. The vehicle-mounted overhead standby power module according to any one of claims 1-5, characterized in that The frame (100) is provided with a flanging part (140) that turns upwards. The flanging part (140) is arranged around the frame (100). A card slot is provided at the bottom end of the outer shell (400). The flanging part (140) and the card slot are in snap-fit connection and are bolted to the side wall of the card slot.

9. Refrigerated truck, characterized in that, It includes a vehicle body (2000) and the vehicle-mounted overhead power supply module according to any one of claims 1-8. The vehicle-mounted overhead power supply module is installed at the top end of the vehicle body (2000).

10. The refrigerated truck according to claim 9, characterized in that, The refrigerated truck further includes a refrigeration system (500). The refrigeration system (500) includes a main compressor (510), a top-mounted refrigeration external machine (520), and a refrigeration internal machine (530). The main compressor (510) is in transmission connection with the engine of the vehicle body (2000), and the main compressor (510) is respectively connected to the top-mounted refrigeration external machine (520) and the refrigeration internal machine (530). The vehicle-mounted overhead power supply module is respectively connected to the top-mounted refrigeration external machine (520) and the refrigeration internal machine (530) to form a standby refrigeration system.

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