JP2011163610A - Cold insulation rice dispenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold insulation rice dispenser which has high quietness, maintains a quality of cleaned rice, has a compact structure requiring a small area for installation since a heat pump device has a laminated structure of a compressor, a cooler, and a blower for cooling, and is superior in the assemblability and maintainability. <P>SOLUTION: A refrigerating cycle device 35 has a laminated structure where the compressor 31, a radiator 32, the cooler 33 at an upper part of a blower 36 for heat radiation, and the blower 37 for cooling are arranged and is reduced in size, wherein the compressor 31 takes long stop time and a controller 42 is also provided which controls the number of revolutions of the blower 36 for heat radiation. Therefore, the high quietness and the stable cool performance are obtained, using the refrigerating cycle device 35 as a heat source. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a cold-retained rice bottle apparatus that needs to store (preserve) polished white rice at a temperature within a predetermined range.

  2. Description of the Related Art Conventionally, as this type of cold insulated rice apparatus, a cold insulated rice apparatus using a Peltier system as a cooling heat source is known as shown in FIG. 7 (see, for example, Patent Document 1).

  This device surrounds the outer periphery of the storage chamber 100 with a heat insulating panel 101, forms a cold air circulation space 102 between the storage chamber 100 and the heat insulating panel 101, and circulates the cold air generated by the cooling device 103. 100 is indirectly cooled. The cooling device 103 includes a Peltier element 104 and a circulation fan 105. The cooling surface of the Peltier element 104 is arranged in the circulation space 102, and the inside of the storage chamber 100 is cooled by circulating the cool air on the cooling surface with the circulation fan 105. Yes.

  Control of the cooling device 103 is performed based on a temperature sensor that detects the temperature in the circulation space 103, and the power supply to the Peltier element 104 is switched according to the space temperature. In addition, a heat radiating fan 106 that air-cools the heat radiating surface of the Peltier element 104 is provided, and the outside surface acts on the heat radiating surface to promote heat dissipation, thereby maintaining the cooling performance of the cooling surface.

JP 2007-315634 A

  However, in the configuration of the cold insulated rice apparatus using the Peltier method as described above, the circulation fan 105 on the internal cooling side and the heat dissipating fan 106 of the Peltier element 104 are continuously operated. There was a drawback.

  Further, since the cooling capacity is generally small, there is a drawback that sufficient cooling capacity cannot be obtained when the ambient temperature is high, and the quality of the white rice is deteriorated. More specifically, when high cooling performance is ensured by the Peltier method, the Peltier element main body and the drive circuit become expensive, and it is difficult to configure at low cost.

  It is also possible to adopt a cooling method using a heat pump equipped with a compressor, but there is a problem of taking into consideration the increase in the size of the rice bowl body, the installation environment, the increase in assembly man-hours, and the serviceability of refrigeration cycle parts. .

  The present invention solves the above-described conventional problems, and improves the quietness of operation and maintains the storage volume substantially equal to the configuration in which the heat source is a Peltier system while using the heat pump device as a heat source. The purpose of the present invention is to provide a cold insulated rice cracker device that stabilizes the cooling performance while being a rice brace body, and is excellent in assembly, maintenance and inspection workability.

In order to solve the above-mentioned problem, the cold insulated rice cracker of the present invention has a cooler and a cooling air blower that constitute a refrigeration cycle device disposed in an upper part of a compressor in the machine room of the main body, and the compressor, An accommodation space for accommodating a laminated structure of a cooler and a cooling blower is formed, and a control device is provided for controlling the cooling blower and the heat dissipation blower during operation of the compressor.

  With this configuration, the operation of the heat pump device as a heat source can be made quiet, stable cooling performance can be obtained by the heat pump action, and the quality of stored items such as stored white rice is maintained in a stable state. be able to.

  In contrast to the configuration in which the Peltier system is used as a heat source, the cold insulated rice bite device of the present invention uses a heat pump device as a heat source. The cooling fan and the heat dissipating fan can be stopped for a long time (the time when there is no sound source), the quietness can be improved, and the stored items can be cooled stably.

  In addition, since the heat pump device has a laminated structure including a compressor, a cooler, and a cooling air blower, the heat pump device can have a compact configuration with a small area required for installation, and can be incorporated into a relatively small cold storage rice cracker. It becomes easy, and it can be set as the structure excellent in assembly property and maintenance property.

  Furthermore, with the configuration in which the cooling chamber and the circulation air path are directly connected, the cooled cold air can be efficiently circulated and the stored items can be indirectly cooled effectively.

  In addition, the water tray for the cooler, the heat insulating lid for the cooling chamber, and the circulating air path for the cold air can be made into one structure, which can reduce the number of parts, cost and assembly man-hours. By storing a part of the cooler in the volume space, the height of the laminated structure formed by the compressor, the cooler and the cooling blower can be further reduced, and the limited machine room Installation work in the space can be made easier.

The perspective view of the state which open | released the front door of the cold rice rice apparatus in Embodiment 1 of this invention The disassembled perspective view from the back of the state which removed the rice bin which shows the integration state of the refrigerating cycle apparatus of the cold storage rice apparatus in the Embodiment 1 Side surface sectional view which shows the internal structure of the cold insulated rice apparatus in Embodiment 1 The rear view which notched one part in the state which removed the back plate which shows the internal structure of the cold insulated rice container apparatus in Embodiment 1 The perspective view from the back side of the main body which shows the formation state of the circulation air path of the cold insulated rice container apparatus in Embodiment 1 The chart which shows the operation control content of the cold insulated rice container apparatus in Embodiment 1 Side cross-sectional view showing the internal structure of a conventional rice cracker using the Peltier method

The invention according to claim 1 is a casing-shaped main body, a storage chamber in which a storage unit for storing stored items is disposed, a heat-insulating partition wall partitioned into a machine room positioned below the storage chamber, and the storage A heat insulating wall that forms a circulation air passage facing the outer peripheral surface of the storage unit in the chamber, a refrigeration cycle apparatus including a compressor, a radiator and a cooler in the machine chamber, and heat exchange by the cooler A cooling blower that supplies cold air into the circulation air passage, and the cooler and the cooling blower are arranged at the top of the compressor, and at a location facing the bottom surface of the storage section in the heat insulating partition wall, A cooling chamber having both ends communicating with the circulation air passage, the cooler and the cooling air blower are disposed in the cooling chamber, and the cooler and the cooling air blower are disposed on the bottom surface of the cooling chamber. And an opening for disposing the opening. A lid, a water receiving tray portion that forms a hollow shape in the thickness direction of the heat insulating lid and receives the condensed water of the cooler, a part of the cooler is housed in the water receiving tray portion, and the intake air of the radiator An intake duct for supplying fresh air to the side wall surface, and a control device for controlling operations of the compressor, the cooling blower, and the heat dissipation blower are provided.

  As a result, since the heat pump device is used as a heat source, the operation control differential can be increased, and the cooling blower and the heat dissipating blower that are linked to the compressor can have a longer stop time (no sound source time). In addition, quietness can be improved as compared to a configuration in which there is no sound source when stopped and the Peltier method is used as a heat source.

  In addition, since the heat pump device has a laminated structure including a compressor, a cooler, and a cooling air blower, the heat pump device can have a compact configuration with a small area required for installation, and can be incorporated into a relatively small cold storage rice cracker. It becomes easy, and it can be set as the structure excellent in assembly property and maintenance property.

  Further, even when installed in a narrow space, fresh air can be sucked into the radiator by the intake duct, and the cooling performance is not deteriorated.

  Further, the cooling chamber and the circulation air passage are directly connected, and the cool air cooled by the cooler can be circulated efficiently.

  In addition, the water tray of the cooler that forms the circulating air path of the cool air and the heat insulating lid for the cooling chamber can be configured as a single structure, and the number of parts, cost, and assembly man-hours can be reduced. is there.

  Furthermore, by storing a part of the cooler in the volume space of the water tray, the height dimension of the laminated structure formed by the compressor, the cooler, and the cooling blower can be further reduced. Installation work in a limited machine room space can be further facilitated.

  According to a second aspect of the present invention, in the first aspect of the present invention, at least one of the temperature or pressure on the high pressure side of the refrigerant circuit, the ambient temperature of the main body, and the operating current of the compressor is detected. Load detecting means for controlling the number of revolutions of the blower for heat dissipation when the detection value by the load detecting means is equal to or greater than a set value.

  As a result, since the heat dissipating blower is operated when the operating load of the compressor is increased, the operation of the unnecessary heat dissipating fan can be suppressed. It is also possible to stop completely, and a quiet cold rice rice apparatus can be provided.

  According to a third aspect of the present invention, in the second aspect of the present invention, the heat dissipating blower is periodically operated when the compressor is stopped.

  By adopting such a configuration, it is possible to promote the evaporation of drain water, and it is possible to provide a cold insulated rice bottle apparatus that does not overflow drain even under conditions where drainage is likely to occur, such as when new rice is introduced or during the rainy season.

(Embodiment 1)
FIG. 1 is a perspective view of a state where a front door of a cold insulated rice cracker apparatus according to Embodiment 1 of the present invention is opened. FIG. 2 is an exploded perspective view from the back side of the state where the rice bottle is removed, showing the state of incorporation of the refrigeration cycle apparatus of the cold insulated rice apparatus according to the first embodiment. FIG. 3 is a side plan view showing the internal structure of the cold insulated rice cracker according to the first embodiment. Moreover, FIG. 4 is the rear view which notched one part in the state which removed the back plate which shows the internal structure of the cold insulated rice apparatus in Embodiment 1. FIG. FIG. 5 is a perspective view from the back side of the main body showing the formation state of the circulation air passage of the cold insulated rice cracker according to the first embodiment.

  1 to 5, a rice box body 1 formed in a casing shape has a top 3 with an inlet 3 for charging white rice (stored material) closed by a lid 2 on the upper surface, and a remaining amount of white rice on the front surface. A panel portion 5 having a remaining amount confirmation window 4 for visual inspection, a weighing operation lever 12a for taking out white rice, and an openable / closable front door 6 for closing the panel portion 5 on the back side. A back plate 15 is detachably attached, and a caster 7 for facilitating movement of the rice bite body 1 is provided at the bottom.

  Further, the inside of the rice box body 1 is partitioned into a storage chamber 9 and a machine chamber 30 both of which are opened by a heat insulating partition wall 8 made of foaming heat insulating material or the like. An open rectangular rice bin (corresponding to the storage unit of the present invention) 10 and a weighing operation unit 12 for measuring a predetermined amount of white rice in the rice bin 10 and discharging it to the rice receiving container 11 are provided.

  Further, the rice bin 10 is arranged at a predetermined interval from the inner surface of the rice bin main body 1, and the periphery of the rice bin 10 is continuous with the heat insulating partition wall 8 that divides the storage chamber 9 and the machine chamber 30 by using the interval. The left and right heat insulating wall bodies 13 and the front and rear heat insulating wall bodies 14 are surrounded. These heat insulating wall bodies 13 and 14 are also formed of a foamable heat insulating material or the like, similarly to the heat insulating partition wall 8.

  As shown in FIG. 5, the left and right heat insulating wall bodies 13 are provided with the rice bin 10 sandwiched from the left and right sides, and the front and rear heat insulating wall bodies 14 are provided on the inner surface of the panel portion 5 and the inner surface of the back plate 15 that forms the rice bit body 1. Each is provided. And by attaching the back plate 15 to the back surface of the main body 1, the rice bit 10 is surrounded by the heat insulating walls 13 and 14, and the open surface of the machine room 30 is also closed. Here, a space 16 (corresponding to the circulation air passage of the present invention) 16 facing the front surface of the rice bottle 10 is formed between the heat insulating wall 14 on the panel portion 5 side and the rice bottle 10.

  In addition, on the back side of the left and right heat insulating wall bodies 13, as shown in FIG. 5, a blow-off air passage (corresponding to the circulation air passage of the present invention) 17 facing the back of the rice bin 10 is formed in the vertical direction. An inflow port 18 that communicates with the blowout air passage 17 is provided in the upper portion of the heat insulating wall 13. Therefore, when the back plate 15 is mounted, the blowout air passage 17 becomes a heat insulation air passage.

  Furthermore, on the inner surfaces of the left and right heat insulating walls 13, a cavity portion (corresponding to the circulation air passage of the present invention) 19 is provided, one of which communicates with the inflow port 18 and the other opens into the space portion 16 on the panel portion 5 side. The left and right surfaces of the rice bin 10 face the inside of the cavity 19 by the formation of the cavity 19.

  In addition, a vent hole 20 is provided over the entire circumference of the upper portion of the rice bin 10. Therefore, the interior of the rice bin 10 communicates with the cavity portion 19 through the vent holes 20 located on the left and right sides, and communicates with the space portion 16 and the blowout air passage 17 on the panel portion 5 side via the vent holes 20 located on the front and rear sides. Communicate.

  Furthermore, the bottom surface of the rice bin 10 is formed in a funnel shape so that white rice can be discharged smoothly. Therefore, the bottom surface has at least three inclined surfaces.

In the heat insulating partition wall 8 partitioned into the storage chamber 9 and the machine chamber 30, one side communicates with the blowout air passage 17 on the surface near the back side of the bottom surface of the rice bin 10, and the other opens into the storage chamber 9. A cooling chamber 22 in which 21 is formed is formed. The bottom surface of the cooling chamber 22 is inclined so as to be a space substantially parallel to the inclination of the bottom surface of the rice bin 10. An opening 23 is provided at a part of the bottom surface of the cooling chamber 22, and the opening 23 is closed by a heat insulating lid 24 made of a heat insulating material that can be molded and attached.

  On the inner surface of the heat insulating lid 24, a water tray portion 25 that is recessed in the thickness direction is provided. And the drain port 26 (not shown) to which the drain hose 38 mentioned later is connected is provided in the lowest position in the water tray part 25. Further, on one side of the heat insulating lid 24, there are provided concave portions 27 for routing pipes 34b and 34c, which will be described later, and lead wires (not shown) of the cooling fan 27.

  Further, an attachment wall (corresponding to the attachment portion of the present invention) 28 is integrally provided on the inner surface of the heat insulating lid 24 adjacent to the water receiving tray portion 25. The mounting walls 28 are for mounting a cooling blower 37, which will be described later, and are provided as a pair via a substantially central space, and mounting grooves 28a are provided on the surfaces facing each other. .

  In the machine room 30, there are a compressor 31, a radiator 32, a decompression device (not shown), a refrigeration cycle device 35 having a cooler 33, and a control device 42 that controls the operation of the refrigeration cycle device 35. The compressor 31, the radiator 32, the pressure reducing device, and the cooler 33 are connected by piping 34 a, 34 b, 34 c so that the refrigerant from the compressor 31 circulates through them.

  The radiator 32 is provided with a heat dissipating blower 36 (which corresponds to the heat dissipating air blower of the present invention) that promotes heat dissipating action, and the cooler 33 is provided with a cooling fan (according to the present invention). 37 (corresponding to a cooling blower) is arranged adjacent to the air blower.

  Here, the cooler 33 and the cooling fan 36 are located above the compressor 31 and are disposed in the cooling chamber 22 formed in the heat insulating partition wall 8. The cooler 33 is arranged so that the lower part thereof is positioned in the volume space of the water tray 25 formed in the heat insulating lid 24, and the cooling fan 37 is mounted on the mounting wall 28 in the mounting groove 28 a. Further, the arrangement is fixed by inserting the left and right sides of the outer shell 37a.

  The pipes 34b and 34c connected to the cooler 33 and the lead wires of the cooling fan 37 are fitted into the recesses 27 of the heat insulating lid 24, thereby enabling the opening 23 in the cooling chamber 22 to be closed by the heat insulating lid 24. Insulation with the machine room 30 is performed.

Further, the radiator 32 is attached to the opening 1 a formed on the side surface of the rice box body 1 so as to face the machine room 30, and a heat radiating fan 36 is disposed closer to the inside of the machine room 30. Here, an intake duct 1 b is disposed in front of the opening 1 a so that fresh air can be supplied to the radiator 32. (In this embodiment, a duct is provided so that air is sucked in from the floor surface direction, but air can be sucked in from the door front surface direction, the back surface direction, etc., or a combination from a plurality of directions)
In addition, as shown in FIG. 4, the radiator 32 has a part of the radiator 32 in the blowing direction of the heat radiating fan 36 positioned in the projection plane in the thickness t direction of the heat insulating wall 13 facing the machine room 30. In addition, the mounting configuration is such that protrusion into the machine room 30 is suppressed.

Further, in the machine room 30, a drain hose 38 connected to the water tray part 25 of the heat insulating lid 24, an evaporating dish 39 that receives drain water from the drain hose 38, and a lower part are drain water in the evaporating dish 39. A water-absorbing sheet 40 immersed in is provided. As shown in FIG. 4, the evaporating dish 39 and the water absorbing sheet 40 are arranged at a position through which the warm air exchanged with the radiator 32 passes.
The warm air promotes evaporation of drain water. Further, as is well known, the high pressure side pipe 34a of the refrigeration cycle apparatus 35 and the evaporating dish 39 may be subjected to heat exchange as is well known.

  Further, the back plate 15 is provided with an exhaust port 15a opened to the machine room 30 and an exhaust duct 41 having one end communicating with the exhaust port 15a. The exhaust port 15a and the exhaust duct 41 are closed. This constitutes the warm air discharge path.

  Here, in FIGS. 3 to 4, the refrigeration cycle is formed by operating the compressor 31, the heat radiating fan 36, and the cooling fan 37. Therefore, the radiator 32 performs a heat dissipation action while obtaining an airflow effect as indicated by an arrow X (FIG. 4), and on the cooler 33 side, an airflow effect is obtained as indicated by an arrow Y (FIGS. 3 and 4). Cooling (endothermic) action is performed.

  Here, in the machine room 30, as shown by the arrow X, the outside air sucked from the outside of the rice box body 1 becomes warm air exchanged with the radiator 32, and promotes evaporation of drain water in the evaporating dish 39, It is discharged from the exhaust duct 41 to the outside of the rice bit body 1 through the mouth 15a.

  On the other hand, on the side of the storage chamber 9 partitioned by the heat insulating partition wall 8, the cool air cooled by the cooler 33 in the cooling chamber 22 is blown by the cooling blower 37 from the blowout air passage 17 to the inlets of the left and right heat insulating wall bodies 14. 18 flows into. At this time, a part of the cold air flows into the rice bin 10 from the vent hole 20 provided in the upper portion of the rice bin 10.

  The cold air flowing into the inlets 18 of the left and right heat insulating wall bodies 14 passes through the cavity portion 19 and flows from the space portion 16 on the panel portion 5 side to the suction port 21 of the cooling chamber 22. When passing, a part of the cold air flows into the rice bottle 10 from the vent hole 20 provided in the upper part of the rice bottle 10, and flows out into the space section 16 through the vent hole 20 opened in the space section 16 on the panel section 5 side. It flows to the suction port 21 of the cooling chamber 22.

  As described above, by circulating the cool air through the cooling chamber 22, the blowout air passage 17, the cavity portion 19, and the space portion 16, the rice bit 10 is cooled mainly by indirect cooling from the surface, and the inside of the rice bit 10 White rice (stored) can be cooled reasonably.

  Next, an operation in which the refrigeration cycle apparatus 35 is intermittently operated based on the detected temperature and the storage temperature of the white rice is adjusted will be described.

  FIG. 6 is a chart showing an example of operation control contents in the cold insulated rice cracker. The compressor 31, the heat dissipating transmitter 36, and the cooling fan 37 are cooled when they reach a predetermined temperature (generally around 15 ° C.) or higher due to the temperature detected by an internal sensor (not shown) located on the suction side of the cooler 33. I am driving.

  Generally, the control differential of the storage chamber temperature of the cooling device used for storing rice is ON / OFF controlled at a set temperature of about ± 2 ° C. However, in the heat pump apparatus of the present invention, the cooling capacity of the compressor 31 is higher than that of the Peltier system, and the cooling speed to a predetermined temperature can be reached quickly, so that the lower temperature limit when the operation is stopped can be lowered, and the differential is large. Can take. (For example, set temperature + 2 ° C. ON, −5 ° C. OFF) As a result, the operation time can be substantially the same as the cooling operation time of the normal cooling device, and the differential width is increased to extend the operation stop time. And can maintain a quiet state without a sound source for a long time.

Further, for example, by using load detection means such as the temperature around the main body (high pressure side pressure, temperature of the refrigerant circuit, operating current of the compressor can be substituted), if the temperature is below a predetermined ambient temperature (T1 in the figure) The sound source during the cooling operation can also be reduced by performing control to reduce the rotational speed of the blower (x% in the figure). In this control, it is of course possible to control in stages depending on the degree of load. In an extreme example, when the outside air temperature is about 20 ° C., the result is that the cooling operation can be continued with the operation of the heat radiating fan 36 stopped, that is, the natural air cooling of the radiator 32, and the sound source reduction that cannot be obtained by the Peltier type Can be expected.

  On the other hand, the drain water condensed on the cooler 33 is received by the water receiving tray 25 of the heat insulating lid 24, led from the drain port 26 to the evaporating tray 39 through the drain hose 38, soaks into the water absorbing sheet 40, and the radiator. It is evaporated by the hot air from 32 and is discharged to the outside from the exhaust duct 41 together with the hot air accompanying heat radiation.

  Here, since there is a possibility that the drain water treatment may be hindered when the load increases or during the rainy season, the heat dissipating fan 36 is periodically operated even when the compressor 31 is stopped (cooling operation is stopped) (heat dissipation in the figure). The drain water that has permeated into the water absorbent sheet 40 by the blower drain acceleration control for the air blower can be evaporated by the air blown from the radiator 32 and discharged from the exhaust duct 41 to the outside. As for the timing, the inrush is determined by the load detection means such as the temperature around the main body, the high-pressure side pressure of the refrigerant circuit, the temperature, the operating current of the compressor 31 and the operating time (continuous, integrated) of the heat pump device.

  As described above, the cold insulated rice cracker of the first embodiment improves the quietness of operation and makes the storage volume substantially equal to the configuration in which the heat source is the Peltier system while using the heat pump device 35 as the heat source. It is possible to provide a cold insulated rice cracker device that stabilizes the cooling performance while maintaining the main body of the rice bottle to be maintained, and is excellent in assembly, maintenance and inspection workability.

  The present invention provides quietness of operation and stable cooling performance, can stably maintain the quality of white rice and the like, can constitute a refrigeration cycle apparatus in a compact manner, and has a limited storage capacity. Arrangement in the machine room is also possible, and the present invention can be applied to a small-sized cooler or the like that uses a Peltier element as a heat source.

1 Rice Bit Body 1a Opening 1b Air Intake Duct 8 Insulation Partition Wall 9 Storage Room 10 Rice Bit (Storage)
13 Heat insulation wall body 14 Heat insulation wall body 15 Back plate 16 Space part (circulation air path)
17 Air outlet (circulation airway)
19 Cavity (circulation air passage)
21 Suction port 22 Cooling chamber 23 Opening 24 Heat insulation lid 25 Water receiving tray 28 Mounting wall (mounting part)
30 Machine Room 31 Compressor 32 Radiator 33 Cooler 35 Refrigeration Cycle Unit 36 Heat Dissipation Blower (Heat Dissipation Blower)
37 Cooling blower (cooling blower)
42 Control device

Claims (3)

A box-shaped main body, a storage chamber in which a storage unit for storing stored items is disposed, a heat-insulating partition wall partitioned into a machine room located below the storage chamber, and an outer peripheral surface of the storage unit in the storage chamber A heat insulating wall forming a facing circulation air passage, a refrigeration cycle apparatus having a compressor, a radiator and a cooler in the machine room, and supplying the cold air heat-exchanged by the cooler into the circulation air passage The cooling air blower, the cooler and the cooling air blower are arranged in the upper part of the compressor, and both ends of the heat insulating partition wall are opposed to the bottom surface of the storage unit, and both ends communicate with the circulation air passage. A cooling chamber, the cooler and the cooling air blower are disposed in the cooling chamber, and an opening for disposing the cooler and the cooling air blower in the cooling chamber on the bottom surface of the cooling chamber; A heat insulating lid for closing the opening, and a thickness of the heat insulating lid; A water tray part that is formed in a concave shape to receive dew condensation water of the cooler, a part of the cooler is housed in the water tray part, and fresh air is supplied to the intake air side wall surface of the radiator An insulated duct device comprising: an air intake duct, and a control device that controls the operation of the compressor, the cooling air blower, and the heat dissipating air blower. It comprises load detection means for detecting at least one of the temperature or pressure on the high pressure side of the refrigerant circuit, the ambient temperature of the main body, and the operating current of the compressor, and the detection value by the load detection means is a set value. The cold insulated rice container apparatus according to claim 1, wherein the rotational speed of the heat radiating fan is controlled at the time described above. The cold insulated rice straw apparatus according to claim 2, wherein the heat-dissipating blower is operated when the compressor is stopped.