Freezer unit for transportation

Abstract

To provide a freezer unit for transportation capable of freely setting a temperature in a plurality of freezing compartments.SOLUTION: A freezer unit for transportation has a container and a freezing machine for transportation. The container has a first freezing compartment divided in a width direction and a second freezing compartment. The freezing machine for transportation includes: a main unit 2 having a compressor 41, a condenser 42 for exchanging heat between a refrigerant and outside air, an expansion valve in which refrigerant flown out of the condenser passes, and a first evaporator 44 for exchanging heat between the refrigerant and air in the first freezing compartment; and a remote unit 3 provided only in the second freezing compartment and having a second evaporator 61 for exchanging heat between the refrigerant supplied from the main freezing cycle device and air in the second freezing compartment.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to transport refrigeration units. [Background technology]

[0002] In vehicles equipped with refrigeration machinery, such as refrigerated trucks, a system has been put into practical use in which the freezer compartment is divided into multiple compartments and the temperatures are managed individually. One such system is described in Patent Document 1 below. In the vehicle disclosed in Patent Document 1 below, the freezer compartment is divided into two compartments in the vehicle width direction, and cold air supplied from a refrigeration cycle device flows into one of the compartments. Because one freezer compartment and the other freezer compartment are connected, the cold air passes through one freezer compartment before flowing into the other freezer compartment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-139944 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when cold air flows sequentially through multiple freezer compartments as described above, the temperature of the freezer compartments located downstream in the direction of the cold air flow is inevitably higher than that of the freezer compartments located upstream. As a result, the degree of freedom in temperature control is reduced, and the efficiency of loading and unloading operations may be impaired. Therefore, there has been a growing demand for a transport refrigeration machine that allows for flexible temperature setting in multiple freezer compartments.

[0005] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a transport refrigeration unit that allows free temperature setting in multiple freezing compartments. [Means for solving the problem]

[0006] In order to solve the above-described problems, the transport refrigeration unit according to the present disclosure is a transport refrigeration unit having a container and a transport refrigeration machine, wherein the container is provided to the transport machine and has a first freezing chamber and a second freezing chamber divided in the width direction of the transport machine, and the transport refrigeration machine is provided with: a main unit having a main refrigeration cycle device including a compressor that compresses a refrigerant, a condenser that exchanges heat between the compressed refrigerant and outside air, an expansion valve through which the refrigerant flowing out of the condenser passes, and a first evaporator that exchanges heat between the refrigerant and the air in the first freezing chamber; and a remote unit provided only in the second freezing chamber and having a second evaporator that exchanges heat between the refrigerant supplied from the main refrigeration cycle device and the air in the second freezing chamber. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a transport refrigeration unit that allows for free temperature setting in multiple freezer compartments. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing the configuration of a vehicle equipped with a transport refrigeration machine according to an embodiment of the present disclosure. FIG. [Figure 2] 1 is a top view illustrating a configuration of a transport refrigeration machine according to an embodiment of the present disclosure. FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2. [Figure 5] FIG. 3 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 1 is a circuit diagram of a transport refrigeration machine according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] A transport refrigeration machine 1 according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 6. FIG.

[0010] (Configuration of transport vehicle 90) First, a transport vehicle 90 (transport machine) on which the transport refrigeration machine 1 is mounted will be described with reference to Fig. 1. As shown in the figure, the transport vehicle 90 includes a vehicle body 91 and a transport refrigeration unit 200.

[0011] The vehicle body 91 has a chassis 92, a plurality of wheels 93, and a cabin 95. The chassis 92 is shaped like a girder extending in the traveling direction of the transport vehicle 90. As an example, the chassis 92 is a ladder frame. The plurality of wheels 93 are provided in pairs on both sides of the width of the chassis 92. At least some of the plurality of wheels 93 are driven to rotate by the driving force of an engine mounted on the chassis 92. In addition, a cabin 95 is attached to the front portion of the chassis 92. The cabin 95 is a housing that houses the driving device, the driver's cab, etc.

[0012] (Configuration of transport refrigeration unit 200) As shown in Figure 1 or 2, transport refrigeration unit 200 has a container 94 and a transport refrigeration machine 1. Container 94 is provided on the rear side of cabin 95. Container 94 has a rectangular parallelepiped shape, for example, and a space serving as a freezing chamber V is formed inside.

[0013] More specifically, as shown in Figure 2, the freezing compartment V has two spaces (a first freezing compartment V1 and a second freezing compartment V2) partitioned in the vehicle width direction. The first freezing compartment V1 is the space on the left side as viewed in the direction of travel of the transport vehicle 90. The second freezing compartment V2 is the space on the right side as viewed in the direction of travel. A partition wall 96 extending in the direction of travel is provided between the first freezing compartment V1 and the second freezing compartment V2. Cold air generated by the transport refrigeration machine 1, which will be described later, is supplied to these first freezing compartment V1 and second freezing compartment V2 to maintain a low temperature state.

[0014] The transport refrigeration machine 1 has a main unit 2 and a remote unit 3. The main unit 2 is arranged to protrude above the cabin 95 from the front wall 97 of the container 94 (i.e., the wall facing forward in the direction of travel). The main unit 2 is provided to mainly cool the first freezing compartment V1. The main unit 2 has a main refrigeration cycle device 4, which will be described later. The remote unit 3 is attached to the ceiling of the second freezing compartment V2 inside the container 94. The remote unit 3 is provided to independently control the temperature of the second freezing compartment V2. The remote unit 3 has a second evaporator 61, a second expansion valve 63, a third fan 62, and a second solenoid valve 64, which will be described later.

[0015] (Configuration of main refrigeration cycle device 4) Prior to describing the arrangement and shape of each device, the circuit configuration of the main refrigeration cycle device 4 included in the main unit 2 will be described. As shown in Fig. 6, the main refrigeration cycle device 4 has a compressor 41, a condenser 42, a first expansion valve 43 (expansion valve), a first evaporator 44, a first fan 45, a second fan 46, a receiver 47, an accumulator 48, a circulation line 49, a bypass line 50, and a first solenoid valve 51.

[0016] The circulation line 49 is filled with refrigerant. The compressor 41, the condenser 42, the first expansion valve 43, and the first evaporator 44 are arranged on the circulation line 49 in this order. The compressor 41 compresses the refrigerant and discharges high-temperature, high-pressure refrigerant. The condenser 42 is, for example, a tube-and-fin type heat exchanger. In the condenser 42, the refrigerant flowing in from the compressor 41 exchanges heat with external air. This reduces the temperature of the refrigerant. Furthermore, this low-temperature refrigerant passes through the first expansion valve 43, thereby reducing the pressure and temperature of the refrigerant. The first evaporator 44 is a heat exchanger similar to the condenser 42. In the first evaporator 44, the refrigerant flowing in from the first expansion valve 43 exchanges heat with the air in the first freezing chamber V1. This causes the refrigerant to absorb heat from the air and increase in temperature, while the air in the first freezing chamber V1 is cooled.

[0017] The first fan 45 is a blower provided next to the condenser 42. Driving the first fan 45 promotes efficient supply of outside air for condensation. The second fan 46 is a blower provided next to the first evaporator 44. Driving the second fan 46 promotes supply of air from the first freezing compartment V1 to the first evaporator 44. The receiver 47 and the accumulator 48 are provided to separate the refrigerant into gas and liquid. The receiver 47 is provided between the first evaporator 44 and the compressor 41, and the accumulator 48 is provided between the condenser 42 and the first expansion valve 43.

[0018] The bypass line 50 is a pipeline for so-called hot gas bypass. The bypass line 50 connects a section of the circulation line 49 between the compressor 41 and the condenser 42 and a section of the circulation line 49 between the first expansion valve 43 and the first evaporator 44. A first solenoid valve 51 is provided on the bypass line 50. The first solenoid valve 51 is an on-off valve that can switch the flow state of the refrigerant in the bypass line 50. When the first solenoid valve 51 is in an open state, the refrigerant discharged from the compressor 41 flows through the bypass line 50 toward the first evaporator 44 without flowing toward the condenser 42. This is to prevent the temperature (pressure) of the first evaporator 44 from excessively decreasing or liquid refrigerant from being drawn into the compressor 41 when the cooling load is small (when there is nothing to be cooled).

[0019] (Remote unit 3 circuit configuration) The remote unit 3 includes a second evaporator 61, a third fan 62, a second expansion valve 63, a second solenoid valve 64, a remote supply line 65, a remote discharge line 66, and a remote bypass line 67. The second evaporator 61 is a heat exchanger having a smaller refrigerant capacity than the first evaporator 44, for example. The remote supply line 65 is connected to the inlet side of the second evaporator 61. One end of the remote supply line 65 is connected to a section of the circulation line 49 between the receiver 47 and the first expansion valve 43. That is, a portion of the refrigerant flowing through the circulation line 49 is extracted and directed to the second evaporator 61 via the remote supply line 65. A second expansion valve 63 is also disposed on the remote supply line 65. The second expansion valve 63 is provided to reduce the pressure and temperature of the refrigerant, similar to the first expansion valve 43.

[0020] A remote discharge line 66 is connected to the outlet side of the second evaporator 61. One end of the remote discharge line 66 is connected to a section of the circulation line 49 between the first evaporator 44 and the accumulator 48. That is, the refrigerant discharged from the second evaporator 61 is returned to the circulation line 49 through the remote discharge line 66. The third fan 62 is a blower provided to forcibly supply air from inside the second freezing compartment V2 to the second evaporator 61.

[0021] The remote bypass line 67 connects the bypass line 50 described above with the section of the remote supply line 65 between the second expansion valve 63 and the second evaporator 61. When performing the bypass operation described above, the refrigerant in the bypass line 50 is distributed by the remote bypass line 67 and can flow toward the second evaporator 61.

[0022] The piping (remote supply line 65, remote discharge line 66, and remote bypass line 67) connecting the main unit 2 and the remote unit 3 configured as described above is physically configured as a "connection piping 70." The connection piping 70 includes a first piping 71, a second piping 72, and a relay piping 73. The first piping 71 is a portion of the remote supply line 65, the remote discharge line 66, and the remote bypass line 67 that extends from the main refrigeration cycle unit 4 side, and the first piping 71 is a portion connected to the main refrigeration cycle unit 4. The second piping 72 is a portion of these lines that extends from the second evaporator 61 side, and the second piping 72 is a portion connected to the second evaporator 61. The relay piping 73 connects the first piping 71 and the second piping 72. As will be described in detail later, the relay piping 73 is detachably attached to the first piping 71 and the second piping 72.

[0023] (Arrangement of devices in main unit 2) Next, the arrangement of each device included in the main unit 2 will be described with reference to Figures 3 to 5. As shown in Figure 3, the main unit 2 is housed in a unit cover 80. Specifically, the unit cover 80 houses the condenser 42, the first evaporator 44, and the second fan 46. The unit cover 80 has a triangular cross-sectional shape when viewed in the vehicle width direction. A top surface 81 of the unit cover 80 extends horizontally, and a bottom surface 82 extends downward from the front side to the rear side. The condenser 42 is housed in the front region of the unit cover 80.

[0024] An internal cover 85 is provided in an area rearward of the condenser 42 within the unit cover 80. The internal cover 85 covers a front wall 97 of the container 94 from the front side. As shown in FIG. 5 , an opening 86 is formed in the front wall 97. The opening 86 is formed across the first freezing chamber V1 and the second freezing chamber V2. A panel 87 is attached to the opening 86. An intake port 88 and an outlet port 89 are formed in the panel 87. The intake port 88 and the outlet port 89 are formed only in a portion of the panel 87 corresponding to the first freezing chamber V1. In other words, the opening 86 on the side of the second freezing chamber V2 is blocked by the panel 87 itself. A maintenance opening 101 for maintenance and inspection is formed in this blocked portion. The maintenance opening 101 is normally blocked by a maintenance panel 102.

[0025] Within the space defined by the internal cover 85, the first evaporator 44 is disposed at the bottom, and the second fan 46 is disposed above it. The first evaporator 44 is disposed facing the air inlet 88 from the front side. The second fan 46 is disposed facing the air outlet 89 from the front side. In other words, when the second fan 46 is driven, an air flow is generated from the air inlet 88 toward the first evaporator 44. This air is temperature-adjusted by heat exchange with the refrigerant in the first evaporator 44, and then returned to the first freezing chamber V1 through the air outlet 89.

[0026] As shown in FIG. 4, the first evaporator 44 and the second fan 46 are arranged to extend toward the second freezing compartment V2. The remote unit 3 is attached to the ceiling of the second freezing compartment V2 and is covered from below by a remote cover. The remote cover houses the second evaporator 61 and the third fan 62. As shown in FIG. 5, the relay pipes 73 connecting the remote unit 3 and the main unit 2 are laid on the indoor side of the front wall 97 of the container 94. The ends of the relay pipes 73 on the main unit 2 side extend to the main unit 2 through piping openings 103 formed in the front wall 97. When the equipment is completed, the relay pipes 73 are covered from the rear by a guard panel 104. The relay pipes 73 are detachably connected to the first pipe 71 and the second pipe 72. The relay pipes 73 are formed of so-called pre-formed pipes, which allows for installation in the transport refrigeration machine 1 without the need for pipe bending or dimensional adjustment at the installation site. In other words, the extension direction and dimensions of the relay pipe 73 are set in advance, and the relay pipe 73 is molded in advance based on these dimensions.

[0027] (Action and effect) In a conventional transport vehicle 90, when the freezing compartment V is divided into two compartments in the vehicle width direction, it is common for the freezing compartment V to be configured so that cold air supplied from a refrigeration cycle device flows into one of the freezing compartments V. Since one freezing compartment V and the other freezing compartment V are connected to each other, the cold air passes through one freezing compartment V and then flows into the other freezing compartment V.

[0028] However, when adopting a configuration in which cold air flows sequentially through multiple freezing compartments V as described above, the temperature of the freezing compartments V located downstream in the flow direction of the cold air will inevitably be higher than that of the freezing compartments V located upstream. As a result, the degree of freedom in temperature control will be reduced, and the efficiency of loading and unloading operations may be impaired. Therefore, there has been a growing demand for a transport refrigeration machine 1 that allows for free temperature setting in multiple freezing compartments V. To solve this problem, the present embodiment adopts the above-described configurations.

[0029] According to the above configuration, in addition to the first evaporator 44 of the main refrigeration cycle device 4, the second freezing chamber V2 is independently provided with a second evaporator 61. Therefore, the first freezing chamber V1 receives a supply of cold air from the first evaporator 44 of the main refrigeration cycle device 4, while the second freezing chamber V2 also receives a supply of cold air from the second evaporator 61. This allows the temperatures of the first freezing chamber V1 and the second freezing chamber V2 to be adjusted independently of each other. This further improves the efficiency of cargo handling operations. Furthermore, because heat exchange in the first evaporator 44 and the second evaporator 61 is performed using refrigerant supplied from a single main refrigeration cycle device 4, an increase in the size of the device and an increase in the number of parts can be avoided. This reduces the maintenance and manufacturing costs of the device. In particular, the transport refrigeration machine 1 can be easily applied to transport vehicles 90 distributed in foreign countries (especially European countries) without significantly modifying the configuration of the refrigeration cycle device applied to transport vehicles 90 distributed in Japan. (This is because in transport vehicles 90 distributed within Japan, the freezer compartment V is generally divided into two in the direction of travel of the vehicle.) Conversely, by changing the positions of the intake port 88 and the exhaust port 89 on the panel 87 of the main unit 2, the transport refrigeration machine 1 can be easily applied to transport vehicles 90 distributed within Japan without major modifications. This greatly improves the versatility of the device.

[0030] According to the above configuration, the air outlet 89 is provided only in the portion corresponding to the first freezing compartment V1. As a result, the cold air that has undergone heat exchange in the first evaporator 44 is mainly supplied only to the first freezing compartment V1. In other words, the first freezing compartment V1 and the second freezing compartment V2 can be thermally insulated from each other. This makes it possible to precisely adjust the temperature of each of the first freezing compartment V1 and the second freezing compartment V2 while keeping them independent of each other. Therefore, the freezing compartments V can be used differently depending on the nature of the cargo, for example, by storing refrigerated goods in the first freezing compartment V1 and frozen goods in the second freezing compartment V2. This further improves the efficiency of cargo handling and delivery operations.

[0031] According to the above configuration, the relay pipe 73 is detachably connected to the first pipe 71 and the second pipe 72. As a result, when installing the transport refrigeration machine 1 in a vehicle, the main unit 2 side (i.e., the main refrigeration cycle device 4 side) and the remote unit 3 side (i.e., the second evaporator 61 side) can be separated and installed separately. This makes it possible to achieve more efficient and faster installation work. Furthermore, by configuring the relay pipe 73 from a molded part, excessive precision is not required for the routing of the pipes at the work site. This makes it possible to further improve the efficiency and speed of the installation work.

[0032] According to the above configuration, the relay pipe 73 is covered with the guard panel 104. Therefore, it is possible to reduce the possibility that goods such as cargo will come into direct contact with the relay pipe 73 during loading and unloading operations. This makes it possible to significantly reduce the risk of refrigerant leakage, etc. Therefore, it is possible to continue operating the transport refrigeration machine 1 stably for a long period of time.

[0033] According to the above configuration, since the maintenance opening 101 is formed, in the event of a malfunction or the like occurring in the main unit 2 (main refrigeration cycle device 4), the main unit 2 can be accessed from the second freezing chamber V2 side through the maintenance opening 101. In other words, there is no need to remove the main unit 2 from the vehicle for maintenance. This can greatly improve the efficiency of maintenance and inspection work. Ultimately, the operating rate of the transport vehicle 90 can be increased, which can greatly improve the efficiency and profitability of loading and unloading work.

[0034] According to the above configuration, by changing the positions of the intake port 88 and the exhaust port 89 on the panel 87 of the main unit 2, the transport refrigeration machine 1 can be easily applied to both transport vehicles 90 distributed within Japan and transport vehicles 90 distributed overseas without any major modifications.

[0035] (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.

[0036] For example, the configuration of the main refrigeration cycle device 4 described in the above embodiment is merely an example and can be modified as appropriate according to the design and specifications. Specifically, the receiver 47, the accumulator 48, and the bypass line 50 can be omitted. Even in this case, the same effects as those described above can be obtained.

[0037] In the above embodiment, a configuration for supplying cold air to two compartments, the first freezing compartment V1 and the second freezing compartment V2, has been described. However, depending on specifications, the freezing compartment V can be divided into three or more compartments. In this case, by installing an evaporator for each compartment, it becomes possible to independently adjust the temperature of each compartment, as described above.

[0038] 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.

[0039] Although not shown in the drawings, it is also possible to adopt a configuration in which a detachable closing panel is provided to cover the above-mentioned air outlet 89. In this case, the first freezer compartment V1 can be kept at room temperature by closing the air outlet 89 with the closing panel to block the cold air. In other words, it is possible to transport both room-temperature cargo and cold-temperature cargo simultaneously in one vehicle. This improves the versatility of the vehicle.

[0040] <Additional Notes> The transport refrigeration machine 1 described in each embodiment can be understood, for example, as follows.

[0041] (1) A transport refrigeration unit 200 according to a first aspect is a transport refrigeration unit 200 having a container 94 and a transport refrigeration machine 1, wherein the container 94 is provided in the transport machine and has a first freezing chamber V1 and a second freezing chamber V2 that are divided in the width direction of the transport machine, and the transport refrigeration machine 1 is provided with: a main unit 2 having a main refrigeration cycle device 4 that has a compressor 41 that compresses a refrigerant, a condenser 42 that exchanges heat between the compressed refrigerant and outside air, an expansion valve through which the refrigerant flowing out from the condenser 42 passes, and a first evaporator 44 that exchanges heat between the refrigerant and the air in the first freezing chamber V1; and a remote unit 3 that is provided only in the second freezing chamber V2 and has a second evaporator 61 that exchanges heat between the refrigerant supplied from the main refrigeration cycle device 4 and the air in the second freezing chamber V2.

[0042] According to the above configuration, in addition to the first evaporator 44 of the main refrigeration cycle device 4, a second evaporator 61 is provided independently in the second freezing compartment V2. Therefore, the first freezing compartment V1 receives a supply of cold air from the first evaporator 44 of the main refrigeration cycle device 4, while the second freezing compartment V2 also receives a supply of cold air from the second evaporator 61. This makes it possible to adjust the temperatures of the first freezing compartment V1 and the second freezing compartment V2 independently of each other.

[0043] (2) A transport refrigeration unit 200 according to a second aspect is the transport refrigeration unit 200 of (1), wherein the container 94 has a front wall 97 that covers the front side of the first freezing chamber V1 and the second freezing chamber V2, and a partition wall 96 that extends rearward from the front wall 97 to separate the first freezing chamber V1 from the second freezing chamber V2, and an air outlet 89 is formed only in the portion of the front wall 97 that corresponds to the first freezing chamber V1, for supplying air that has exchanged heat with the refrigerant in the first evaporator 44 into the first freezing chamber V1.

[0044] According to the above configuration, the air outlet 89 is provided only in the portion corresponding to the first freezing compartment V1. As a result, the cold air that has undergone heat exchange in the first evaporator 44 is mainly supplied only to the first freezing compartment V1. In other words, the first freezing compartment V1 and the second freezing compartment V2 can be thermally insulated from each other. This makes it possible to precisely adjust the temperatures of the first freezing compartment V1 and the second freezing compartment V2 independently of each other.

[0045] (3) A transport refrigeration unit 200 according to a third aspect is the transport refrigeration unit 200 of (1) or (2), wherein the connection piping 70 connecting the main unit 2 and the remote unit 3 includes a first piping 71 connected to the main refrigeration cycle device 4 constituting the main unit 2, a second piping 72 connected to the second evaporator 61 constituting the remote unit 3, and a relay piping 73 provided in the second freezing chamber V2 and detachably connecting the first piping 71 and the second piping 72.

[0046] According to the above configuration, the relay pipe 73 is detachably connected to the first pipe 71 and the second pipe 72. As a result, when the transport refrigeration machine 1 is installed in a vehicle, the main unit 2 side (i.e., the main refrigeration cycle device 4 side) and the remote unit 3 side (i.e., the second evaporator 61 side) can be separated and installed separately.

[0047] (4) The transport refrigeration unit 200 according to a fourth aspect is the transport refrigeration unit 200 of (3), further comprising a guard panel 104 provided within the second freezing chamber V2 and covering the relay pipe 73 from the rear side.

[0048] According to the above configuration, the relay pipe 73 is covered with the guard panel 104. Therefore, it is possible to reduce the possibility that goods such as cargo will come into direct contact with the relay pipe 73 during loading and unloading operations. This makes it possible to significantly reduce the risk of refrigerant leakage, etc.

[0049] (5) The transport refrigeration unit 200 according to the fifth aspect is the transport refrigeration unit 200 of (2), further comprising a maintenance opening 101 provided in a portion of the front wall 97 corresponding to the second freezing chamber V2, which allows access to the main unit 2 from within the second freezing chamber V2.

[0050] According to the above configuration, since a maintenance opening 101 is formed, in the event of a malfunction or the like occurring in the main unit 2 (main refrigeration cycle device 4), the main unit 2 can be accessed from the second freezing chamber V2 side through the maintenance opening 101.

[0051] (6) Transport refrigeration unit 200 according to a sixth aspect is transport refrigeration unit 200 according to (2), further comprising a closing panel that covers air outlet 89 and is provided in a removable manner.

[0052] According to the above configuration, by closing the air outlet 89 with the closing panel to block cold air, the first freezer compartment V1 can be kept at room temperature, thereby improving the versatility of the vehicle.

[0053] (7) The transport refrigeration unit 200 according to the seventh aspect is the transport refrigeration unit 200 of (1) or (2), in which the first evaporator 44 is arranged so as to protrude toward the second freezing chamber V2.

[0054] According to the above configuration, by changing the positions of the intake port 88 and the exhaust port 89 on the panel 87 of the main unit 2, the transport refrigeration machine 1 can be easily applied to both transport vehicles 90 distributed within Japan and transport vehicles 90 distributed overseas without any major modifications. [Explanation of symbols]

[0055] 1...Transport refrigeration machine 2...Main unit 3...Remote unit 4...Main refrigeration cycle device 41...Compressor 42...Condenser 43...First expansion valve 44...First evaporator 45...First fan 46...Second fan 47...Receiver 48...Accumulator 49...Circulation line 50...Bypass line 51...First solenoid valve 61...Second evaporator 62...Third fan 63...Second expansion valve 64...Second solenoid valve 65...Remote supply line 66...Remote discharge line 67...Remote bypass line 70...Connecting piping 71...First piping 72...Second piping 73...Relay piping 80...Unit cover 81...Top surface 82...Bottom surface 85...Inner cover 86...Opening 87...Panel 88...Intake port 89...Outlet 90...Transport vehicle 91...Vehicle body 92...Chassis 93...Wheels 94...Container 95...Cabin 96...Partition wall 97...Front wall 101...Maintenance opening 102...Maintenance panel 103...Pipe opening 104...Guard panel 200...Transport refrigeration unit V...Freezing chamber V1...First freezing chamber V2...Second freezing chamber

Claims

1. A transport refrigeration unit having a container and a transport refrigeration machine, the container is provided in a transport machine and has a first freezing chamber and a second freezing chamber that are divided in the width direction of the transport machine, The transport refrigeration machine comprises: a compressor that compresses a refrigerant; a condenser for exchanging heat between the compressed refrigerant and outside air; an expansion valve through which the refrigerant flowing out of the condenser passes; a first evaporator for exchanging heat between the refrigerant and the air in the first freezing chamber; a main unit having a main refrigeration cycle device including: a remote unit provided only in the second freezing chamber and having a second evaporator for exchanging heat between the refrigerant supplied from the main refrigeration cycle device and air in the second freezing chamber; A transport refrigeration unit comprising:

2. The container includes a front wall covering the front sides of the first freezing chamber and the second freezing chamber; a partition wall extending rearward from the front wall to separate the first freezing chamber and the second freezing chamber; and 2. The transport refrigeration unit according to claim 1, wherein an air outlet is formed in only a portion of the front wall corresponding to the first freezing chamber, through which air that has exchanged heat with the refrigerant in the first evaporator is supplied into the first freezing chamber.

3. The connecting pipe connecting the main unit and the remote unit is a first pipe connected to the main refrigeration cycle device constituting the main unit; a second pipe connected to a second evaporator constituting the remote unit; a relay pipe provided in the second freezing chamber and detachably connecting the first pipe and the second pipe; 3. A transport refrigeration unit according to claim 1 or 2, comprising:

4. The transport refrigeration unit according to claim 3 , further comprising a guard panel provided in the second freezing compartment and covering the relay pipe from a rear side.

5. The transport refrigeration unit according to claim 2 , further comprising a maintenance opening provided in a portion of the front wall corresponding to the second freezer compartment, the maintenance opening allowing access to the main unit from within the second freezer compartment.

6. The transport refrigeration unit according to claim 2 , further comprising a detachable closing panel that covers the air outlet.

7. 3. The transport refrigeration unit according to claim 1, wherein the first evaporator is disposed so as to protrude toward the second freezing compartment.

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