JP2019074224A - Refrigerator for transportation and container with refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport refrigerator capable of preventing a load from becoming locally hot due to heat generated by an electric heater and preventing an operator from coming into contact with a high temperature object. SOLUTION: In a transport container 2 and a transport refrigerator 3 provided on the front side of the transport container 2 to cool the inside of the transport container 2, the transport refrigerator 3 is air from inside the transport container 2. A casing 6 having a suction port 4 for sucking in the air, and an outlet 5 provided above the front surface and blowing out the air sucked from the suction port 4 into the transportation container 2, and an outlet 5 of the casing 6. It has an electric heater unit 10 provided in the vicinity of the downstream side of the above. [Selection diagram] Fig. 1

Description

  The present invention relates to a transport refrigerator and a container with a refrigerator used particularly for land transportation.

  Outside temperature is very low in winter in extremely cold regions such as high latitude countries such as Northern Europe. In particular, in freezing transportation on land by a trailer, if the temperature in the container is made to be 5 to 10 ° C. (chilled temperature) by the refrigerator, frost may be formed on the refrigerator (heat pump). In order to bring the inside of the container to a chilled temperature, an electric heater is installed as an optional item in the transport refrigerator, but conventionally, the electric heater is installed in the vicinity of the suction port in the refrigerator which is easy to attach.

  FIG. 8 is a schematic view showing an example of a conventional container with a refrigerator. Hereinafter, the configuration of the conventional refrigerator-equipped container will be described in more detail with reference to FIG. The conventional refrigerator-equipped container 101 includes a transportation container 102 and a transportation refrigerator 103 provided on the front side of the transportation container 102 and cooling the inside of the transportation container 102.

  The transport refrigerator 103 is provided with a suction port 104 for sucking in air from the inside of the transport container 102, and a blowout port 105 which is provided above and blows out the air sucked from the suction port 104 into the transport container 102. The casing 106 is provided. As indicated by an arrow passing through the inside of the casing 106 in FIG. 8, air sucked from the suction port 104 passes through the inside of the casing 106 and is blown out from the blowout port 105.

  In the casing 106, an evaporator 107 used as a heat exchanger for heat exchange of air sucked from the suction port 104 and a fan 108 for blowing air to the evaporator 107 are provided. The evaporator 107 is provided with a plurality of electric heaters 111 for heating the air sucked from the suction port 104. In FIG. 8, the shipping container 102 is omitted by an alternate long and short dashed line, and the loading space in which the load is loaded in the shipping container 102 is omitted by a dashed line.

  In such a container 101 with a refrigerator, the air in the transport container 102 is sucked into the transport refrigerator 103 from the suction port 104, passes through the transport refrigerator 103, is cooled, and from the outlet 105 The air is blown into the transport container 102 and circulated in the container with refrigerator 101. In the winter season in extremely cold regions, the temperature of the circulating air is configured to be an appropriate temperature by the electric heater 111.

  Patent Document 1 below describes that, in the invention of the refrigeration container, the evaporator is provided with a heater in order to prevent frost formation on the evaporator. The patent document 1 does not describe the provision of a heater for temperature control in the container in the refrigerator. Moreover, the control circuit of an air conditioning apparatus is described in the following patent document 2, and a timer is driven by the timing which an electric heater inverts to off command from on command, time until timer counts up, a fan, It is stated that the operation of the car is continued.

JP 2008-8521 A Japanese Patent Application Laid-Open No. 57-73337

However, as described above, when the electric heater is installed in the vicinity of the suction port in the refrigerator, the heat generation density is low when the number of electric heaters is small because the air velocity is low because the opening of the suction port is wide. Therefore, in order to obtain the necessary heating capacity, it was necessary to increase the number of electric heaters.
Also, if the transport container does not have a bulkhead to separate the load space and the refrigerator, the load will be loaded to the vicinity of the suction port, so the radiant heat from the electric heater will cause the load to be locally hot. Could have been. In addition, there is a risk that the worker may come in contact with a hot material because there is a possibility that the heater may be at a high temperature where the worker works.

  The present invention has been made in view of such circumstances, and it is possible to prevent the load from becoming locally high in temperature due to the heat from the electric heater and for the worker to prevent the worker from coming in contact with a high temperature object. The purpose is to provide a machine.

In order to solve the above-mentioned subject, the present invention adopts the following means.
The present invention is a transport refrigerator provided on the front side of a transport container for cooling the inside of the transport container, wherein the transport refrigerator is a suction port for sucking in air from the transport container, and A casing provided above the front surface and having a blowout port formed therein for blowing air sucked from the suction port into the transport container, and electricity provided near the downstream side of the blowout port of the casing And a heater unit.

  In the transport refrigerator of the present invention, since the electric heater portion is provided in the vicinity of the downstream side of the outlet of the casing (for example, the position adjacent to the downstream side of the outlet of the casing) Air can be heated. In addition, since the air outlet is formed at the upper side of the casing, and the electric heater portion is provided in the vicinity of the downstream side of the air outlet, the load loaded on the transportation container is in the vicinity of the transportation refrigerator Even when disposed, since the distance between the load and the electric heater portion is high, it is possible to prevent the heat from the electric heater portion from locally raising the load. Moreover, since there is no electric heater which becomes high temperature in the part which a worker works, the risk that a worker contacts a high temperature thing can be reduced.

  The transport refrigerator preferably includes a heater guard provided to surround the electric heater unit.

  If the heater guard is provided so as to surround the electric heater unit, the risk of cargo and workers coming into contact with the electric heater unit can be further reduced.

  It is preferable that the transport refrigerator includes a fan provided above the casing and control means for stopping the electric heater unit before the fan is stopped.

  In the transport refrigerator of the present invention, since the electric heater section is stopped before the fan is stopped by the control means, the fan does not flow firstly or simultaneously and the air does not flow in the casing and the electric heater It is possible to prevent the parts from overheating.

  In the transport refrigerator, the fan and the electric heater unit are connected to a power supply line from a power supply supplying power, and the power supply, the fan, and the electric heater unit are connected at a branch point of the power supply line. Preferably, a switch is provided between the power supply and the branch point to control supply or stop of the electric power to the fan and the electric heater unit.

  As described above, the fan and the electric heater unit are connected to the power supply line from the power supply supplying power (that is, the power supply system of the fan and the electric heater unit is common) and at the branch point of the power supply line If there is a branch between the power supply and the fan and the electric heater unit, and a switch is provided between the power supply and the branch point to control supply or stop of the electric power to the fan and the electric heater unit, When the power supply is stopped (the fan motor power supply system loses power), the power supply to the electric heater can be stopped (the power supply system of the electric heater also loses power). Therefore, when the fan is stopped, the supply of power to the electric heater unit can be stopped, so that the electric heater unit can be prevented from being overheated.

  In the transport refrigerator, preferably, a plurality of tubular sheath heaters are arranged in the height direction in the electric heater portion from the upper side to the lower side.

  In the electric heater section, if a plurality of tubular sheath heaters are arranged in the height direction from the upper side to the lower side, the air passing through the electric heater section is uniformly distributed from the upper side to the lower as compared with a single stage. Since the heat can be applied without the air, the air blown out from the air outlet can be sufficiently heated.

  In the transport refrigerator, preferably, a plurality of tubular sheath heaters are arranged in the electric heater portion from the outlet side to the downstream side.

  In the electric heater section, if the tubular sheath heaters are arranged in a plurality of rows from the outlet side to the downstream side, heat is applied to air passing through the electric heater for a longer time than in the case of one row. Therefore, the air blown out from the outlet can be sufficiently heated.

  In the transport refrigerator, the sheath heater is disposed in the electric heater portion so that the sheath heaters adjacent to each other do not overlap in the air flow direction when viewed from the outlet side. Is preferred.

  In the electric heater unit, as viewed from the outlet side, if the tubular sheath heaters are arranged such that adjacent sheath heaters do not overlap in the flow direction of the air blown out from the outlet, the electric heater unit Heat can be applied to the air passing through for a longer time, and the air passing through the electric heater section can be applied to all the sheath heaters, so that the air blown out from the outlet can be sufficiently heated. Can.

  The present invention provides a container with a refrigerator comprising the above-described transport refrigerator and a transport container.

  If it is such a container with a refrigerator, it can prevent that a load becomes high temperature locally by the heat by an electric heater part. In addition, the risk of the worker coming into contact with the high temperature material can be reduced.

  In the container with a refrigerator, it is preferable that a temperature sensor or a thermostat be provided on the inner surface of the transport container and in the vicinity of the electric heater portion.

  If a temperature sensor or a thermostat is provided on the inner surface of the transport container, it is possible to prevent damage due to overheating of the heat insulating material inside the transport container.

  According to the transport refrigerator and the refrigerator-equipped container of the present invention, it is possible to prevent local high temperature of the load due to the heat from the electric heater unit. In addition, the risk of the worker coming into contact with the high temperature material can be reduced. As a result, the safety and commodity strength of the transport refrigerator and the container with the refrigerator can be improved.

It is a side sectional view showing an outline of one embodiment of a container with a refrigerator of the present invention. The container with a refrigerator of FIG. 1 WHEREIN: It is a fragmentary sectional side view which shows the state which loaded the load on the transport container. It is a timing chart which shows ON / OFF of a fan motor and an electric heater part. It is a circuit diagram which shows the circuit structure of the power supply in the container with a refrigerator of FIG. 1, a fan, and an electric heater part. It is a side sectional view showing an outline of another embodiment of a container with a refrigerator of the present invention. An example of arrangement which arranges a tubular sheath heater to an electric heater part is shown, and each of (a)-(h) is a sectional view showing a modification. (A) when adjacent sheath heaters overlap in the air flow direction, (b) when the sheath heaters are arranged in multiple stages in the height direction from above to below, and (c) air flow direction FIG. 7 is a schematic view showing a portion through which air flows and a portion through which air does not flow when adjacent sheath heaters do not overlap with each other. It is a sectional side view which shows an example of the conventional container with a refrigerator.

  Hereinafter, an embodiment of a container with a refrigerator according to the present invention will be described with reference to the drawings.

[Container with refrigerator]
FIG. 1 is a schematic view showing an example of a container with a refrigerator according to the present invention.
The refrigerator-equipped container 1 of the present embodiment includes the transport container 2 and the transport refrigerator 3 provided on the front wall 33 on the front side of the transport container 2 and cooling the inside of the transport container 2 ( In FIG. 1, the shipping container 2 is omitted by an alternate long and short dash line, and the loading space in which the load is loaded in the shipping container 2 is omitted by a dashed line).

  The transport refrigerator 3 includes a compressor (not shown) for compressing the refrigerant, a condenser (not shown) for condensing the compressed refrigerant, and an expansion valve (not shown) for expanding the condensed refrigerant. And an evaporator 7 for evaporating the expanded refrigerant. As a compressor, for example, a scroll compressor or a rotary compressor is used. The compressor is driven by an engine or an electric motor.

  The transport refrigerator 3 is provided above the front wall 33 and the suction port 4 for sucking in air from inside the transport container 2, and blows the air sucked from the suction port 4 into the transport container 2. It has a casing 6 in which an outlet 5 is formed. As indicated by the arrows passing through the inside of the casing 6 in FIG. 1, the air sucked from the suction port 4 passes through the inside of the casing 6 and is blown out from the blowout port 5. The area of the opening of the outlet 5 is smaller than the area of the opening of the inlet 4.

  Further, in the casing 6, an evaporator 7 used as a heat exchanger for heat exchange of air sucked from the suction port 4 and a fan 8 provided above the inside of the casing 6 for blowing air to the evaporator 7 are provided. It is equipped.

  Here, in the vicinity of the downstream side of the blowout port 5 of the casing 6, an electric heater unit 10 for heating the air blown out from the blowout port 5 is provided. The electric heater unit 10 is composed of an electric heater 11, and as the electric heater 11, for example, a tubular sheath heater can be mentioned. A plurality of rod-shaped or U-shaped sheath heaters may be arranged, or may be constituted by a single sheath heater bent a plurality of times in a folded shape, or other embodiments may be adopted.

  The air blown out of the outlet 5 can be heated by the electric heater unit 10 described above. Further, the electric heater portion 10 is provided in the vicinity of the downstream side of the blowout port 5 formed above the casing 6.

  A heater guard 12 is provided in the transport refrigerator 3 so as to surround the electric heater unit 10.

  Moreover, the control means 13 which makes the electric heater part 10 stop is provided in the container 1 with a refrigerator, before the fan 8 stops.

  In FIG. 2, a partial side cross-sectional view showing a state in which a load is loaded on the transport container 2 is shown. In addition, below, when the electric heater 11 is arranged in 2 rows from the blower outlet 5 side, and is alternately shifted and arrange | positioned in the electric heater part 10, the case where a load is loaded on the transport container 2 is demonstrated as an example. The height (length in the vertical direction) of the electric heater portion 10 at this time is A.

  As the transport container 2, for example, one in which a heat insulating material 30 (for example, made of urethane) is provided in the transport container 2 is used, and the height (length in the vertical direction) of the transport container 2 is Generally it is less than 2.5 m (2,500 mm).

  However, as shown in FIG. 2, in order to circulate air inside the transport container 2, when loading the load 31 in the transport container 2, the outlet 5 (and the electric heater unit 10) is a load. It is necessary to load so as to be higher than the upper surface of 31. That is, a certain amount of space 32 needs to be provided between the load 31 and the ceiling in the transport container 2. The distance between the electric heater unit 10 and the heat insulator 30 on the ceiling of the transport container 2 at this time is B. This space 32 is a dead space.

  FIG. 3 is a timing chart showing turning on and off of the fan motor and the electric heater. As shown in FIG. 3, the control means 13 is set in advance to stop (turn off) the electric heater unit 10 a predetermined time before the motor (fan motor) of the fan 8 stops (turns off). Thus, the fan motor is stopped after a predetermined time (time for delaying the set stop of the fan motor) has elapsed after the electric heater unit 10 is stopped.

  Further, as shown in FIG. 4, in the transport refrigerator 3, the fan 8 and the electric heater unit 10 are connected to the power supply line 21 from the power supply 20 that supplies power, and at the branch point 22 of the power supply line 21. The power supply 20 and the fan 8 and the electric heater unit 10 are branched. A switch 23 (for example, a switch for a fan motor) is provided between the power supply 20 and the branch point 22 to control the supply or stop of the electric power to the fan 8 and the electric heater unit 10.

  Furthermore, as shown in FIG. 4, a switch 24 for the electric heater unit is provided between the branch point 22 and the electric heater unit 10.

According to the configuration described above, according to the present embodiment, the following effects can be obtained.
As described above, in the container with refrigerator 1 of the present embodiment, the electric heater unit 10 is provided in the vicinity of the downstream side of the blowout port 5 formed above the casing 6. Therefore, even when the load loaded on the transport container 2 is disposed in the vicinity of the transport refrigerator 3, there is a distance between the load and the electric heater unit 10. Therefore, it is possible to prevent the load from becoming locally hot due to the heat from the electric heater unit 10. Moreover, since there is no electric heater which becomes high temperature in the part which a worker works, the risk that a worker contacts a high temperature thing can be reduced.

  Further, as described above, the transport refrigerator 3 is provided with the heater guard 12 so as to surround the electric heater unit 10. In this way, it is possible to further reduce the risk of cargo or a worker coming into contact with the electric heater unit 10.

  As described above, the container 1 with a refrigerator is provided with the control means 13 for stopping the electric heater unit 10 before the fan 8 is stopped. Since the electric heater unit 10 is stopped before the fan 8 is stopped by the control means 13, the air does not flow in the casing 6 when the fan 8 is stopped first, and the electric heater unit 10 is overheated. Can be prevented. The installation position of the control means 13 is not particularly limited, and may be installed outside the transport refrigerator 3 as shown in FIG. 1 or may be installed inside the transport refrigerator 3. good.

  Here, in the present embodiment, the electric heater portion 10 is provided in the vicinity of the downstream side of the blowout port 5 of the casing 6, but since the area of the opening is smaller than the suction port 4, the air flow rate is large. . Therefore, the space 32 (dead space) can be effectively used by providing the electric heater unit 10 in the vicinity of the outlet 5 with a large air volume, and the electric heater on the suction side in the refrigerator as in the conventional container with a refrigerator The efficiency can be approximately tripled compared to when As a result, the number of electric heaters disposed in the electric heater unit 10 can be reduced (for example, although approximately 18 electric heaters have been conventionally used, the number of electric heaters may be reduced to approximately 6 in the present embodiment. You can get the effect of heating the air to some extent). Therefore, the size of the electric heater unit 10 can be miniaturized. Specifically, the height (length in the vertical direction) A of the electric heater unit 10 in FIG. 2 can be 200 mm or less. Moreover, since the electric heater part 10 can be miniaturized, the heater guard 12 can also be made small.

  Further, since the electric heater unit 10 can be miniaturized, at this time, a distance B of about 100 mm between the electric heater unit 10 in FIG. 2 and the heat insulating material 30 of the ceiling of the transport container 2 may be secured. it can. As described above, a certain distance is provided between the electric heater unit 10 and the heat insulating material 30 on the ceiling of the transport container 2. Thereby, the risk of heat damage to the heat insulating material 30 of the ceiling of the transport container 2 by the electric heater unit 10 can be reduced when the air volume of the fan 8 decreases or the fan 8 stops.

  Further, as shown in FIG. 4, a switch 23 is provided between the power supply 20 and the branch point 22. Thus, when the power supply to the fan 8 is stopped (the power supply of the fan motor system is lost), the power supply to the electric heater unit 10 can also be stopped (the power supply system of the electric heater unit 10 is also lost). Therefore, even when the air volume of the fan 8 is reduced or the fan 8 is stopped, the evaporator 7 is contaminated by dirt and the like on the load side and the air can not be sucked from the suction port 4 side. When the power supply is stopped, the supply of power to the electric heater unit 10 can be stopped. As a result, it is possible to prevent the electric heater unit 10 from being overheated and causing heat damage to the heat insulating material and the load of the surrounding transportation container.

  Further, as shown in FIG. 4, a switch 24 for the electric heater unit is provided between the branch point 22 and the electric heater unit 10. Thereby, the supply or the stop of the power to the electric heater unit 10 can be controlled independently of the switch 23, and the temperature adjustment in the refrigerator-equipped container 1 becomes easier.

  FIG. 5 is a side sectional view showing the outline of another embodiment of the container with a refrigerator according to the present invention. The container 1 with a refrigerator shown in FIG. 5 is the same as that of FIG. 1 except that a thermostat 14 is provided on the inner surface of the transport container 2 and in the vicinity of the electric heater unit 10. Thus, it is preferable to provide the thermostat 14 in the container 1 with a refrigerator. It is also preferable to provide a temperature sensor instead of the thermostat 14.

With the configuration described in FIG. 5, according to the present embodiment, the following effects can be obtained.
As shown in FIG. 5, by providing the thermostat 14, for example, when the heat insulating material 30 in the vicinity of the electric heater unit 10 becomes high temperature, the heat insulating material is stopped by stopping the electric heater unit 10 by the thermostat 14. 30 overheating can be prevented.

  Moreover, by providing a temperature sensor instead of the thermostat 14, when the heat insulating material 30 in the vicinity of the electric heater part 10 becomes high temperature, an alarm is issued by the temperature sensor, and the heat is discharged before the heat insulating material 30 is overheated. It is possible to stop the heater unit 10. Moreover, based on the detection signal of a temperature sensor, it can also be set as the structure which makes the electric heater part 10 stop automatically. Thereby, overheating of the heat insulating material 30 can be prevented.

  Thus, if the thermostat 14 and the temperature sensor are provided, the evaporator 7 may become dirty in the transport refrigerator 3 or the air volume of the fan 8 may be reduced due to the decrease in the frequency or voltage of the power supply 20. The heat insulating material 30 inside the container 2 can be prevented from overheating. Thereby, the heat insulating material 30 can be prevented from being damaged.

  Next, the example of arrangement | positioning of the electric heater 11 to the electric heater part 10 is shown to Fig.6 (a)-(h). Each of FIG. 6 (a)-(h) is sectional drawing which showed the modification. In addition, the arrow in FIG. 6 has shown the direction into which air flows in from the blower outlet 5 side. In the present embodiment, for example, a tubular sheath heater is used as the electric heater 11, and the tubular sheath heater is disposed as shown in FIGS. 6A to 6H to configure the electric heater unit 10. In Drawing 6 (a)-(h), although a tubular sheath heater was arranged and electric heater part 10 was constituted, it is not limited to these.

  FIG. 6A shows an example in which the electric heaters 11 are arranged in two rows from the blowout port 5 side and alternately shifted. FIG. 6B shows an example in which the electric heaters 11 are simply arranged in two rows from the outlet 5 side. FIG. 6C shows an example in which the electric heaters 11 are arranged in a row from the blowout port 5 side. FIG. 6D shows an example in which the electric heater 11 is arranged in two stages from the upper side to the lower side. FIG. 6 (e) shows an example in which the electric heaters 11 are provided in two rows from the blowout port 5 side, and alternately arranged in a direction opposite to that of FIG. 6 (a). FIG. 6F is an example in which the electric heaters 11 are arranged in three rows from the blowout port 5 side and shifted in all three rows. FIG. 6 (g) is an example in which the electric heaters 11 are arranged in three rows from the blowout port 5 side and shifted only in the second row. FIG. 6 (h) shows an example in which the electric heaters 11 are arranged in three rows from the outlet 5 side, three in the first row, two in the second row, and one in the third row.

  Here, as shown in FIGS. 6A to 6H, it is preferable that in the electric heater unit 10, a plurality of tubular sheath heaters be arranged in the height direction from the upper side to the lower side.

  In the electric heater unit 10, if a plurality of tubular sheath heaters are arranged in the height direction from the upper side to the lower side, the air passing through the electric heater unit 10 will be from the upper side to the lower side It can add heat evenly. Therefore, the air which blows off from blow-off mouth 5 can be fully heated.

  As shown in FIGS. 6 (a), (b) and (d) to (h), a plurality of tubular sheath heaters are arranged in the electric heater section 10 from the blowout port 5 side to the downstream side. Is preferred.

  In the electric heater unit 10, if the tubular sheath heaters are arranged in a plurality of rows from the outlet 5 side to the downstream side, it takes longer time for air passing through the electric heater unit 10 than in the case of one row. It can add heat. Therefore, the air which blows off from blow-off mouth 5 can be fully heated.

  Further, in the case where the tubular sheath heaters are arranged in a plurality of rows from the outlet 5 side to the downstream side in the electric heater unit 10, as shown in FIGS. 6 (a), (e) and (f), the electric heaters In the portion 10, as viewed from the blowout port 5 side, it is preferable that the sheath heaters be arranged such that adjacent sheath heaters do not overlap in the air flow direction.

  In the electric heater unit 10, as viewed from the blowout port 5 side, if the tubular sheath heaters are arranged such that adjacent sheath heaters do not overlap in the flow direction of the air blown out from the blowout port 5, electricity Heat can be applied to the air passing through the heater unit 10 for a longer time, and the air passing through the electric heater unit 10 can be applied to all the sheath heaters. Therefore, the air which blows off from blow-off mouth 5 can be fully heated.

  In order to further improve the heating efficiency of air, among the arrangement examples of FIGS. 6 (a) to 6 (h), the arrangement examples of FIGS. 6 (a), (e) and (h) are more preferable. Preferably, the arrangement example shown in FIG. 6A is most preferable because a sufficient distance between the electric heater unit 10 and the central portion of the transport container 2 can be secured.

  Next, in FIG. 7, (a) when the sheath heaters adjacent to each other overlap in the air flow direction, (b) when the sheath heaters are arranged in multiple stages in the height direction from the upper side to the lower side, (C) The schematic which shows the part into which air flows, and the part which air does not flow in, when adjacent sheath heaters do not overlap in the flow direction of air. In addition, the part shown by the dotted line in FIG. 7 shows the part through which air is flowing, and the part shown by dot shape shows the part through which air does not flow.

  In the arrangement example of FIGS. 6 (a), (e) and (h) described above, adjacent sheath heaters are separated as compared with the arrangement example of FIGS. 6 (b), (d) and (g). As a result, a portion (dead area) where air does not flow between the adjacent sheath heaters is less likely to occur (FIG. 7A). Further, in the arrangement example of FIGS. 6A, 6E, and 6H, the interval between the sheath heaters adjacent in the vertical direction does not become narrower than in the arrangement example of FIG. It is hard to produce the part where air does not flow on the opposite side to the side (FIG. 7 (b)). Furthermore, in the arrangement examples of FIGS. 6A, 6E, and 6H, the distance between the sheath heaters closest to each other in the left-right direction does not narrow as compared to the arrangement example of FIG. It is hard to produce the part where air does not flow between the sheath heaters which fit (FIG.7 (c)).

  As described above, according to the container with a refrigerator of the present embodiment, it is possible to prevent the load from locally becoming high temperature due to the heat from the electric heater unit. In addition, the risk of the worker coming into contact with the high temperature material can be reduced.

DESCRIPTION OF SYMBOLS 1 Container with refrigerator 2 Container for transport 3 Container for transport 4 Suction port 5 Air outlet 6 Casing 7 Evaporator 8 Fan 10 Electric heater part 11 Electric heater 12 Heater guard 13 Control means 14 Thermostat 20 Power source 21 Power source line 22 Branch point 23 (For fan motor) Switch 24 Switch for electric heater unit 30 Insulation material 31 Load 32 Space 33 Front wall A Height of electric heater unit B Distance between electric heater unit and insulation on ceiling of transport container

Claims (9)

A transport refrigerator provided on the front side of a transport container and cooling the inside of the transport container,
The transport refrigerator has a suction port for sucking in air from the transport container, and a blowout port provided above the front surface and blowing out the air sucked from the suction port into the transport container. With a formed casing,
An electric heater portion provided in the vicinity of the downstream side of the outlet of the casing;
A transport refrigerator characterized by having:   The transport refrigerator according to claim 1, wherein the transport refrigerator has a heater guard provided to surround the electric heater unit.   The transport refrigerator has a fan provided above the casing, and includes control means for stopping the electric heater unit before the fan is stopped. The transport refrigerator according to claim 2 or 3.   In the transport refrigerator, the fan and the electric heater unit are connected to a power supply line from a power supply supplying power, and the power supply, the fan, and the electric heater unit are connected at a branch point of the power supply line. Between the power supply and the branch point, there is provided a switch for controlling supply or stop of the electric power to the fan and the electric heater unit. The transport refrigerator according to 3.   5. The transportation according to claim 1, wherein a plurality of tubular sheath heaters are arranged in the height direction from the upper side to the lower side in the electric heater portion. refrigerator.   The transport according to any one of claims 1 to 5, wherein a plurality of tubular sheath heaters are arranged in the electric heater portion from the outlet side to the downstream side. Refrigerator.   7. The electric heater unit according to claim 6, wherein the sheathed heaters are arranged such that adjacent sheathed heaters do not overlap in the flow direction of the air, as viewed from the outlet side. Transport refrigerator as described in. The transport refrigerator according to any one of claims 1 to 7;
A shipping container,
A container with a refrigerator characterized in comprising:   The container with a refrigerator according to claim 8, wherein a temperature sensor or a thermostat is provided on the inner surface of the transport container and in the vicinity of the electric heater portion.

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