Composite unit of refrigeration machinery for transportation

Abstract

To provide a composite unit of refrigeration machinery for transportation, the composite unit having higher heat exchange performance.SOLUTION: A composite unit comprises a condenser unit housing a condenser, and a compressor unit that is combined with the condenser unit and houses a compressor. The condenser unit has: a first casing that has a rectangular parallelepiped shape and has suction ports respectively formed in a front surface and a lateral surface on one side; a condenser disposed in the first casing and having a first portion and a second portion that face, from the inside, the front surface and the lateral surface on the one side; a first fan provided inside the first portion; and a second fan provided inside the second portion. In a plan view, the compressor unit is disposed to be one-sided toward one side of a back surface side of the first casing, thereby forming a ventilation space between the compressor unit and the back surface of the first casing.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to a combined unit for a transport refrigeration machine. [Background technology]

[0002] For example, a vehicle for transporting cargo at low temperatures, such as a refrigerated truck, is equipped with a transport refrigeration machine. The transport refrigeration machine is equipped with a refrigeration cycle device that mainly includes a compressor, a condenser, an expansion valve, and an evaporator. Conventionally, the compressor unit, condenser unit, and other components that make up the refrigeration cycle device have generally been disposed under the floor of the vehicle, i.e., below the chassis (see, for example, Patent Document 1 below).

[0003] In recent years, electric vehicles that use battery units (storage batteries) to generate the power they need to run have come into practical use. These types of battery units tend to be larger in size in order to ensure a long driving distance. For this reason, battery units are generally housed and fixed below the chassis of the vehicle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2004-526120 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the battery unit becomes larger as described above, if a condenser unit or the like is placed below the chassis, the battery unit and the high-voltage circuit unit are placed close to each other, which causes the air supply path (air passage) required for the condenser unit to be blocked, resulting in the problem of inefficient heat exchange.

[0006] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a combined unit of a transport refrigeration machine having higher heat exchange performance. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the composite unit of a transport refrigeration machine according to the present disclosure is a composite unit of a transport refrigeration machine that is mounted on a transport vehicle and has a refrigeration cycle device, the composite unit comprising: a condenser unit having a condenser that condenses a refrigerant; and a compressor unit coupled to the condenser unit and having a compressor that compresses the refrigerant. The condenser unit comprises a first casing that is rectangular and has suction ports formed on its front face and one side face, the condenser that is disposed within the first casing and has a first part and a second part that face the front face and one side face from the inside, a first fan provided inside the first part, and a second fan provided inside the second part. In plan view, the compressor unit is biased toward one side of the back face of the first casing, thereby forming a ventilation space that is partitioned by the side of the compressor unit and the back face of the first casing. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a combined unit for a transport refrigeration machine and a transport refrigeration machine having higher heat exchange performance. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram illustrating the configuration of a vehicle and a transport refrigeration machine according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a transparent plan view showing the configuration under the chassis of the vehicle according to the embodiment of the present disclosure. [Figure 3] 1 is a refrigerant circuit diagram showing a configuration of a refrigeration cycle device according to an embodiment of the present disclosure. [Figure 4] FIG. 1 is an electrical circuit diagram illustrating an electrical system of a transport refrigeration machine according to an embodiment of the present disclosure. [Figure 5] FIG. 2 is a perspective view illustrating a configuration of a composite unit according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a cross-sectional view showing the configuration of a composite unit according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a perspective view of the inside of a condenser unit according to an embodiment of the present disclosure, viewed from the rear side. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a composite unit 200 of a transport refrigeration machine 1 according to an embodiment of the present disclosure (hereinafter simply referred to as composite unit 200) and the transport refrigeration machine 1 will be described with reference to FIGS. 1 to 7. FIG.

[0011] (Transport vehicle configuration) First, a transport vehicle 90 on which the transport refrigeration machine 1 is mounted will be described with reference to Figures 1 and 2. As shown in the figures, the transport vehicle 90 includes a vehicle body 91, the transport refrigeration machine 1, and an electric circuit system 3.

[0012] The vehicle body 91 has a chassis 92, a plurality of wheels 93, a container 94, and a cabin 95. The chassis 92 extends in the traveling direction of the transport vehicle 90. As shown in FIG. 2, the chassis 92 is, for example, a ladder frame. The plurality of wheels 93 are provided in pairs on both sides of the chassis 92 in the width direction. At least some of the plurality of wheels 93 are driven to rotate by the driving force of an engine or an electric motor (not shown) mounted on the chassis 92. A cabin 95 is attached to the front portion of the chassis 92. The cabin 95 is a housing that houses a driving device, a driver's cab, etc. A container 94 is provided behind the cabin 95. The container 94 is, for example, rectangular parallelepiped, and a space serving as a freezer compartment V is formed inside the container 92.

[0013] (Chassis bottom configuration) 1 or 2, in addition to the devices that make up the transport refrigeration machine 1, a battery unit 2 is mounted (mounted) below the chassis 92. As will be described in detail later, this battery unit 2 is a storage battery that supplies power to the devices, for example, to generate power for running the transport vehicle 90 and to drive the transport refrigeration machine 1.

[0014] More specifically, as shown in Figure 2, the ladder-frame-shaped chassis 92 has a pair of frames 96 that extend in the traveling direction and are arranged at a distance in the vehicle width direction. These frames 96 are connected to each other by beams (not shown) that extend in the vehicle width direction. The battery units 2 are distributed and arranged on both sides of these frames 96 in the vehicle width direction.

[0015] Furthermore, in the spaces between the battery units 2, some of the devices (described later) that make up the transport refrigeration machine 1 are mounted.

[0016] (Configuration of transport refrigeration machines) Next, the configuration of the transport refrigeration machine 1 will be described with reference to Figure 3. As shown in the figure, the transport refrigeration machine 1 includes a refrigeration cycle device 4.

[0017] (Configuration of refrigeration cycle device) The refrigeration cycle device 4 has a compressor 41, a condenser 42, an expansion valve 43, an evaporator 44, an accumulator 48, a receiver 47, a condenser fan 45, an evaporator fan 46, an oil separator 49, and a refrigerant line L.

[0018] The refrigerant line L is filled with refrigerant. The refrigerant line L is a closed pipe that forms a loop as a whole. A compressor 41, a condenser 42, an expansion valve 43, and an evaporator 44 are arranged in this order on the refrigerant line L. The compressor 41 compresses the refrigerant and discharges high-temperature, high-pressure refrigerant. The condenser 42 is a heat exchanger that exchanges heat between the compressed refrigerant and external air. Specifically, a fin-and-tube or plate-type heat exchanger is preferably used as the condenser 42. The expansion valve 43 expands the refrigerant to reduce its pressure and temperature. The evaporator 44 cools the air in the freezing compartment V by exchanging heat between the low-temperature refrigerant and the air in the freezing compartment V. The evaporator 44 is attached to the ceiling of the freezing compartment V (see FIG. 1). The refrigerant heated by the heat exchange in the evaporator 44 flows back into the compressor 41. The refrigeration cycle device 4 operates by continuously performing the above cycle.

[0019] The condenser fan 45 is a blower device provided next to the condenser 42. Driving the condenser fan 45 promotes efficient supply of outside air to the condenser 42. The evaporator fan 46 is a blower device provided next to the evaporator 44. Driving the evaporator fan 46 promotes supply of air from the freezing compartment V to the evaporator 44. The accumulator 48 and the receiver 47 are provided to separate the refrigerant into gas and liquid. The accumulator 48 is provided between the evaporator 44 and the compressor 41, and the receiver 47 is provided between the condenser 42 and the expansion valve 43. The oil separator 49 is a device that removes lubricating oil (grease) contained in the refrigerant discharged from the compressor 41 from the refrigerant and returns the removed oil to the compressor 41.

[0020] (Configuration of electrical circuit system) The refrigeration cycle device 4 is driven by an electric circuit system 3. As shown in FIG.

[0021] The battery unit 2 has a high-voltage battery 33 and a low-voltage battery 34. The high-voltage battery 33 generates a direct current with a higher voltage than the low-voltage battery 34. A high-voltage circuit 31 is connected to the high-voltage battery 33. The high-voltage circuit 31 has an inverter 51 and a DC-DC converter 52.

[0022] The inverter 51 generates an AC current having a predetermined frequency and voltage from the DC current supplied by the high-voltage battery 33. This AC current is supplied to the electric motor 100 which is the drive source of the compressor 41.

[0023] The DC-DC converter 52 is a device for converting the voltage of the direct current supplied from the high-voltage battery 33. Specifically, the DC-DC converter 52 is a step-down converter. The direct current whose voltage has been converted is supplied to the low-voltage circuit 32.

[0024] The low-voltage circuit 32 has a main circuit 61, a communication circuit 62, and a relay circuit 63. The main circuit 61 executes processing for controlling the operation of the inverter 51 based on a pre-stored program. The main circuit 61 receives input signals such as the set temperature in the freezing compartment V from a cabin controller 64 provided in the cabin 95. The main circuit 61 outputs a control signal for operating the inverter 51 so that the temperature in the freezing compartment V maintains the set temperature based on detection signals from temperature sensors (not shown) provided inside and outside the freezing compartment V. The control signal output from the main circuit 61 is transmitted to the inverter 51 via the communication circuit 62.

[0025] The relay circuit 63 is electrically connected to the main circuit 61. Based on signals output from the main circuit 61, the relay circuit 63 controls the operation of the condenser fan 45 and the evaporator fan 46, as well as the open / closed states of various sensors, various valves, and the expansion valve 43.

[0026] (Configuration of each unit) The compressor 41 and condenser 42 included in the refrigeration cycle device 4 configured as described above, and the high-voltage circuit 31 and low-voltage circuit 32 included in the electrical circuit system 3 can be distributed and arranged in various parts of the transport vehicle 90 as independent units.

[0027] Specifically, as shown in FIG. 1 or 2, in this embodiment, these units are mounted in the space between the battery units 2 below the chassis 92. In the following description, a unit including the compressor 41 will be referred to as a "compressor unit 71." The compressor unit 71 has a second casing 400 (see FIG. 6) described below and the compressor 41 housed therein. A unit including the condenser 42 will be referred to as a "condenser unit 72." The condenser unit 72 has a first casing 300 (see FIG. 6) described below and the condenser 42 housed therein. A unit that houses the high-voltage circuit 31 will be referred to as a "high-voltage circuit unit 73." The high-voltage circuit unit 73 has a high-voltage circuit unit casing (not shown) and the high-voltage circuit 31 housed therein. A unit that houses the low-voltage circuit 32 will be referred to as a "low-voltage circuit unit 74." The low-voltage circuit unit 74 has a low-voltage circuit unit casing (not shown) and the low-voltage circuit 32 housed therein.

[0028] 2, the high-voltage circuit unit 73 and the low-voltage circuit unit 74 are disposed in a front portion of the frame 96 on the left side as viewed in the direction of travel, so as to overlap in the vehicle width direction. As an example, the compressor unit 71 and the condenser unit 72 are disposed in a rear portion of the frame 96 on the left side as viewed in the direction of travel, so as to overlap in the vehicle width direction. The compressor unit 71 and the condenser unit 72 are coupled to each other to form a combined unit 200. Note that the combined unit 200 may also be disposed on the frame 96 on the right side as viewed in the direction of travel, as opposed to the above.

[0029] (Composite unit configuration) Next, the configuration of the combined unit 200 will be described with reference to Figures 5 to 7. As shown in Figure 5, the combined unit 200 includes a condenser unit 72, a compressor unit 71, and a coupling portion 201.

[0030] The condenser unit 72 and the compressor unit 71 are integrally connected by a connecting portion 201 to form a single combined unit 200. The condenser unit 72 and the compressor unit 71 are both rectangular parallelepiped shaped.

[0031] (condenser unit) As shown in FIG. 6, the condenser unit 72 includes a first casing 300, a condenser 42, a partition plate 301, a first fan 45a, a second fan 45b, a receiver 47, a dryer 302, and an economizer 303.

[0032] As shown in FIG. 5, the first casing 300 has a rectangular parallelepiped shape. The first casing has a top surface 81a, a bottom surface 82a, a pair of side surfaces 83a, a front surface 84a, and a back surface 85a. In the following description, of the pair of side surfaces 83a facing both sides in the traveling direction of the transport vehicle 90, the side surface 83a facing the rear side will be referred to as the "side surface 83a on one side," and the side surface 83a facing the front side will be referred to as the "side surface 83a on the other side." The front surface 84a of the first casing 300 (i.e., the surface facing outward in the vehicle width direction) and one of the pair of side surfaces 83a (i.e., either surface facing the traveling direction) are provided with an intake port 310. The intake port 310 is an opening for drawing in outside air toward the condenser 42. The first intake port 311 formed on the front surface 84a has a larger area than the second intake port 312 formed on the side surface 83a. These suction ports 310 are covered by suction panels 320. The suction panels 320 are provided to prevent dust and foreign matter from entering the inside of the first casing 300.

[0033] The compressor unit 71 is disposed on the rear surface 85a side of the condenser unit 72. The condenser unit 72 has a larger volume than the compressor unit 71. A connecting portion 201 is provided between the rear surface 85a of the condenser unit 72 and the front surface 84b of the compressor unit 71. Although not shown in detail, the connecting portion 201 connects these units together in the vehicle width direction with bolts and nuts. The condenser unit 72 is disposed outboard of the compressor unit 71 in the vehicle width direction.

[0034] Each of the remaining surfaces of the first casing 300, except for the front surface 84a and one side surface 83a, is formed as an opening for discharging to the outside the air that has completed heat exchange in the condenser 42. Although not shown in detail, these openings may be formed by configuring the first casing 300 with a frame-shaped member, or may be openings formed in a flat plate-shaped member.

[0035] 6, the condenser 42 has a first portion 42a facing the front surface 84a from the inside and a second portion 42b facing the side surface 83a from the inside. The first portion 42a and the second portion 42b are integrally connected, and the condenser 42 is L-shaped in plan view. The refrigerant can freely move between the first portion 42a and the second portion 42b.

[0036] A partition plate 301 is disposed further inward from the condenser 42. The partition plate 301 is a member for supporting and fixing a first fan 45a and a second fan 45b (described later) inside the first casing 300. In a plan view, the partition plate 301 has a first plate portion 301a extending parallel to the first portion 42a and a second plate portion 301b formed integrally with the first plate portion 301a. The second plate portion 301b is connected to an edge on one side of the first plate portion 301a and extends toward the rear surface 85 as it moves toward that side. The partition plate 301 as a whole extends from the top surface 81a to the bottom surface 82a. This allows the partition plate 301 to function as a strength member for the first casing 300.

[0037] As shown in Fig. 7, a first fan 45a is attached to the first plate portion 301a of the partition plate 301. The first fan 45a has a first impeller 331 (Fig. 6) that is rotatable about a first rotation axis X1 that extends horizontally. The first rotation axis X1 extends in a direction from the front surface 84a toward the rear surface 85a. In other words, the first fan 45a is configured to draw air in a direction perpendicular to the first portion 42a of the condenser 42.

[0038] A second fan 45b is attached to the second plate portion 301b of the partition plate 301. The second fan 45b has a second impeller 332 that can rotate around a second rotation axis X2 that extends horizontally. As shown in FIG. 6, the second rotation axis X2 extends in a direction perpendicular to the second plate portion 301b of the partition plate 301 in a plan view. That is, the second rotation axis X2 extends in a direction different from the first rotation axis X1. Furthermore, as shown in FIG. 7, when viewed from the front surface 84a, the first rotation axis X1 is located below the second rotation axis X2. The diameters of the first fan 45a and the second fan 45b are the same. Therefore, the upper edge of the first fan 45a is located below the upper edge of the second fan 45b.

[0039] Further toward the back surface 85a of the first fan 45a and the second fan 45b, the receiver 47, the dryer 302, and the economizer 303 are appropriately arranged in positions that do not obstruct the flow of air. Of these accessories, the dryer 302 and the economizer 303 are not shown in FIG. 3 , but are arranged midway along the refrigerant line L. The dryer 302 is a device that removes moisture contained in the refrigerant, and the economizer 303 is a device that pre-cools the refrigerant prior to heat exchange with outside air in the condenser 42.

[0040] (Compressor unit) As shown in FIG. 6, the compressor unit 71 includes a second casing 400, a compressor 41, an accumulator 48, and an oil separator 49.

[0041] The second casing 400 has a rectangular parallelepiped shape similar to the first casing 300. That is, like the first casing 300, the second casing 400 has a top surface 81b, a bottom surface 82b, a pair of side surfaces 83b, a front surface 84b, and a back surface 85b. Meanwhile, the second casing 400 has a smaller dimension in the traveling direction than the first casing 300. The second casing 400 is disposed at a position offset to one side of the back surface 85a of the first casing 300. That is, in a plan view, the other side surface 83b of the second casing 400 is located to one side of the other side surface 83a of the first casing 300. The one side surface 83a of the first casing 300 and the one side surface 83b of the second casing 400 are positioned at the same position relative to each other in the traveling direction. The compressor 41, the accumulator 48, and the oil separator 49 are appropriately disposed in the space within the second casing 400.

[0042] By arranging the condenser unit 72 and the compressor unit 71 as described above, a space is defined by the rear surface 85a of the first casing 300 and the other side surface 83b of the second casing 400. This space is defined as a ventilation space V2. More specifically, the ventilation space V2 is defined by four surfaces: an imaginary extension surface S1 of the other side surface 83a of the first casing 300, an imaginary extension surface S2 of the rear surface 85b of the second casing 400, the rear surface 85a of the first casing 300, and the other side surface 83b of the second casing 400. Air discharged from the rear surface 85a of the first casing 300 flows into the ventilation space V2. In addition, a group of pipes 500 connecting the devices included in the condenser unit 72 and the compressor unit 71 are also concentrated and laid in the ventilation space V2.

[0043] (Action and effect) In recent years, electric vehicles that use a battery unit 2 (storage battery) to generate power for driving have come into practical use. This type of battery unit 2 tends to be larger in size in order to ensure a long driving distance. For this reason, the battery unit 2 is generally housed and fixed below the chassis 92 of the vehicle.

[0044] However, when the battery unit 2 is enlarged as described above, if the condenser unit 72 and the like are disposed below the chassis 92, the battery unit 2 and the condenser unit 72 and the like are disposed close to each other. This causes a problem that the air supply path (air passage) required for the condenser unit 72 is obstructed, preventing efficient heat exchange. To solve this problem, the present embodiment employs the above-described configurations.

[0045] According to the above configuration, the compressor unit 71 is disposed on one side of the rear surface 85a of the first casing 300 of the condenser unit 72, i.e., on the side of the side surface 83a where the air inlet 310 is formed, with the two units forming a ventilation space V2 on the rear surface 85a side. This ensures a proper airflow path for supplying and discharging air to and from the condenser 42. Specifically, air taken in through the air inlet 310 on the one side 83a and the front surface 84a comes into contact with the condenser 42, exchanges heat with the refrigerant, and then is discharged from the rear surface 85a side toward the ventilation space V2. This ensures that at least the ventilation space V2 is sufficient, even if another device is disposed adjacent to the combined unit 200. This significantly reduces the possibility that the airflow path will be obstructed by the other device. Furthermore, the piping group 500 can be centrally laid in the ventilation space V2. Therefore, it is possible to improve the heat exchange efficiency and also save space required for arranging the composite unit 200.

[0046] According to the above configuration, the rotation axis of the second fan 45b extends from the second portion 42b of the condenser 42 toward the ventilation space V2. This allows the second fan 45b to efficiently and stably supply air from the second portion 42b of the condenser 42 toward the ventilation space V2. That is, air flowing into the second portion 42b from one side surface 83 is compressed by the second fan 45b and discharged into the ventilation space V2 through the rear surface 85a. Furthermore, because the second portion 42b extends in a different direction from the first portion 42a, the condenser 42 can be made smaller and more space-saving than, for example, a large-area heat exchanger formed only with the first portion 42a facing the front surface 84a. This allows for both improved heat exchange efficiency and space-saving arrangement of the composite unit 200.

[0047] According to the above configuration, for example, the rotation axis of the first fan 45a is located lower than the rotation axis of the second fan 45b in a front view. This makes it possible to secure space above the first fan 45a for accommodating other accessories and piping. In other words, it is not necessary to provide space elsewhere for accommodating other accessories and piping. Furthermore, the air path of the first fan 45a is not obstructed by these accessories and piping. This makes it possible to efficiently compress and send air from the first fan 45a toward the condenser 42. Therefore, it is possible to achieve both improved heat exchange efficiency and space savings related to the arrangement of the combined unit 200.

[0048] According to the above configuration, the partition plate 301 can support and fix the first fan 45a and the second fan 45b. Furthermore, because the partition plate 301 is bent to match the orientation of the first fan 45a and the second fan 45b, its rigidity against loads from the vertical direction is higher than that of a flat plate. Therefore, the vertical strength and rigidity of the first casing 300 can be further increased by providing the partition plate 301. This improves the impact resistance of the composite unit 200, enabling it to continue stable operation for a long period of time.

[0049] (Other embodiments) The above describes in detail the embodiments of the present disclosure with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like are also included within the scope that does not deviate from the gist of the present disclosure.

[0050] For example, the configuration of the refrigeration cycle device 4 described in each of the above embodiments is merely an example and can be modified as appropriate according to the design and specifications. Specifically, the accumulator 48, the receiver 47, and the oil separator 49 can be omitted as appropriate. Even in this case, the same effects as those described above can be obtained.

[0051] In addition, in each of the above embodiments, an example has been described in which the freezer compartment V is a single space. However, depending on the specifications, the freezer compartment V can be divided into two or more compartments. In this case, by installing an evaporator 44 for each compartment, it becomes possible to adjust the temperature of each compartment independently.

[0052] In addition, the application of the transport refrigeration machine 1 is not limited to vehicles traveling on land, but the transport refrigeration machine 1 can also be applied to, for example, containers 94 for ships and railroad cars. In either case, the same effects as those described above can be obtained.

[0053] <Additional Notes> The combined unit 200 of the transport refrigeration machine 1 and the transport refrigeration machine 1 described in each embodiment can be understood, for example, as follows.

[0054] (1) A combined unit 200 of a transport refrigeration machine 1 according to a first aspect is mounted on a transport vehicle 90 and includes a refrigeration cycle device 4. The combined unit 200 includes a condenser unit 72 having a condenser 42 for condensing a refrigerant, and a compressor unit 71 coupled to the condenser unit 72 and having a compressor 41 for compressing the refrigerant. The condenser unit 72 includes a first casing 300 having a rectangular parallelepiped shape and having suction ports 310 formed on a front surface 84a and one side surface 83a, respectively. The condenser 42 has a first part 42a and a second part 42b that face the front surface 84a and the side surface 83a on one side from the inside, a first fan 45a provided inside the first part 42a, and a second fan 45b provided inside the second part 42b, and in a plan view, the compressor unit 71 is arranged biased toward one side on the back surface 85a side of the first casing 300, thereby forming a ventilation space V2 that is partitioned by the side surface 83b of the compressor unit 71 and the back surface 85a of the first casing 300.

[0055] According to the above configuration, the compressor unit 71 is disposed on one side of the back surface 85a of the first casing 300 of the condenser unit 72, that is, on the side of the side surface 83a where the suction port 310 is formed, and the two units form a ventilation space V2 on the back surface 85a side. This makes it possible to ensure an air passage for supplying and discharging air to and from the condenser 42.

[0056] (2) The composite unit 200 of the transport refrigeration machine 1 according to the second aspect is the composite unit 200 of the transport refrigeration machine 1 of (1), in which the rotation axis of the second fan 45b extends in a direction from the second part 42b side of the condenser 42 toward the ventilation space V2 side.

[0057] According to the above configuration, the rotation axis of the second fan 45b extends in a direction from the second portion 42b side of the condenser 42 toward the ventilation space V2. This allows the air flow by the second fan 45b to be efficiently and stably supplied from the second portion 42b of the condenser 42 toward the ventilation space V2.

[0058] (3) The composite unit 200 of the transport refrigeration machine 1 according to the third aspect is the composite unit 200 of the transport refrigeration machine 1 of (1) or (2), and when viewed from the front, the rotation shaft of the first fan 45a is located at a different height position from the rotation shaft of the second fan 45b.

[0059] According to the above configuration, a space can be secured above or below either of the first fan 45a and the second fan 45b, corresponding to the difference in height between the first fan 45a and the second fan 45b. This space can be used to accommodate other accessories and piping.

[0060] (4) The composite unit 200 of the transport refrigeration machine 1 according to the fourth aspect is the composite unit 200 of the transport refrigeration machine 1 of (3), in which the rotation axis of the first fan 45a is positioned lower than the rotation axis of the second fan 45b.

[0061] According to the above configuration, the rotation axis of first fan 45a is located lower than the rotation axis of second fan 45b, which makes it possible to secure space above first fan 45a for accommodating other accessories and piping.

[0062] (5) The composite unit 200 of the transport refrigeration machine 1 according to the fifth aspect is the composite unit 200 of the transport refrigeration machine 1 according to any one of the aspects (1) to (4), and further includes a partition plate 301 that supports the first fan 45a and the second fan 45b and extends from the top surface 81a side of the first casing to the bottom surface 82a side.

[0063] According to the above configuration, the first fan 45a and the second fan 45b can be supported and fixed by the partition plate 301. The strength and rigidity of the first casing 300 in the vertical direction can be further increased by providing the partition plate 301. [Explanation of symbols]

[0064] 1...Transport refrigeration machine 2...Battery unit 3...Electrical circuit system 4...Refrigeration cycle device 31...High-voltage circuit 32...Low-voltage circuit 33...High-voltage battery 34...Low-voltage battery 41...Compressor 42...Condenser 42a...First section 42b...Second section 43...Expansion valve 44...Evaporator 45...Condenser fan 45a...First fan 45b...Second fan 46...Evaporator fan 47...Receiver 48...Accumulator 49...Oil separator 51...Inverter 52...DC-DC converter 61...Main circuit 62...Communication circuit 63...Relay circuit 64...Cabin controller 71...Compressor unit 72...Condenser unit 73...High-voltage circuit unit 74...Low-voltage circuit unit 81a, 81b...Top surface 82a, 82b...Bottom surface 83a, 83b...Side surface 84a, 84b...Front 85a, 85b...Rear 90...Transport vehicle 91...Vehicle body 92...Chassis 93...Wheels 94...Container 95...Cabin 96...Frame 100...Motor 200...Composite unit 201...Connection portion 300...First casing 301...Partition plate 301a...First plate portion 301b...Second plate portion 302...Dryer 303...Economizer 310...Suction port 311...First suction port 312...Second suction port 320...Suction panel 331...First impeller 332...Second impeller 400...Second casing 500...Pipe group L...Refrigerant line X1...First rotating shaft X2...Second rotating shaft S1, S2...Imaginary extension plane V...Freezer compartment V2...Ventilation space

Claims

1. A transport refrigeration machine composite unit mounted on a transport vehicle and having a refrigeration cycle device, The composite unit comprises: a condenser unit having a condenser; a compressor unit coupled to the condenser unit and having a compressor; Equipped with The condenser unit comprises: a first casing having a rectangular parallelepiped shape and having suction ports formed on a front surface and one side surface, the condenser disposed in the first casing and having a first portion and a second portion facing the front surface and the one side surface from the inside; a first fan disposed inside the first portion and a second fan disposed inside the second portion; and In a plan view, the compressor unit is positioned biased toward one side of the back side of the first casing, thereby forming a ventilation space partitioned by the side of the compressor unit and the back side of the first casing.

2. 2. The combined unit for a transport refrigeration machine according to claim 1, wherein the rotation shaft of the second fan extends in a direction from the second portion of the condenser toward the ventilation space.

3. 3. The combined unit for a transport refrigeration machine according to claim 1, wherein the rotation shaft of the first fan is provided at a different height from the rotation shaft of the second fan.

4. 4. The combined unit for a transport refrigeration machine according to claim 3, wherein the rotation shaft of the first fan is positioned lower than the rotation shaft of the second fan.

5. 3. The composite unit of a transport refrigeration machine according to claim 1, further comprising a partition plate that supports the first fan and the second fan and extends from the top surface side to the bottom surface side of the first casing.

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