JP2016070602A - Storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat insulating efficiency in a storage space 3 without using a refrigeration machine 16 of large capacity and large size, and reducing load of the refrigeration machine 16.SOLUTION: A storage device includes a freezer 1, a partitioning wall 7 for dividing the inside of the freezer 1 into the storage space 3 and a thermal storage space 4 for accommodating a latent heat storage material 14, the refrigeration machine 16 generating cold air of a prescribed temperature and distributing the same, an air supply passage 19 for supplying the cold air to the storage space 3 and the thermal storage space 4, a switch damper 20 for switching the cold air to be supplied to only the storage space 3, only the thermal storage space 4, or both of the storage space 3 and the thermal storage space 4, a communication passage 10 disposed on the partitioning wall 7 for communicating the storage space 3 with the thermal storage space 4, an opening/closing damper 11 for opening and closing the communication passage 10, a recycling passage 29 for communicating the thermal storage space 4 with the refrigeration machine 16, and a recycling passage damper 30 for opening and closing the recycling passage 29.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a storage device for storing an object to be stored in a space maintained in a predetermined temperature range, and particularly to a storage device provided with a latent heat storage material.

  Conventionally, in a refrigerating vehicle having a refrigerator driven by an engine to cool air and a storage space into which cool air from the refrigerator is introduced, by storing a latent heat storage material in the storage space, the heat storage There is known a technique for keeping the inside of a storage space at a certain temperature or less and reducing the load on the refrigerator due to cold air generated by the heat absorption of the material.

  For example, in patent document 1, while installing the heat insulation container which accommodated the thermal storage material in the storage space of a freezer car, the inside is made into the thermal storage space which connects with storage space, and the communication part to the storage space of the thermal storage space The cooling space is cooled while the refrigerator is in operation, the heat storage material in the heat storage space is also cooled, and when the refrigerator is stopped by stopping the engine of the freezer, the fan is turned on and cooled by the heat storage material. There has been proposed a system in which the air in the insulated container is introduced into the storage space so that the storage space can be cooled.

  In addition, for example, in Patent Document 2, a panel filled with a heat storage material sandwiched between thin metal plates is arranged on the wall surface in the storage space of the refrigerator car or in the vicinity of the object to be stored to improve the cooling efficiency. Is disclosed.

JP 2003-341415 A International Publication No. 2008/053853 Pamphlet

  However, in the thing of patent document 1, since the storage space and the heat storage space are always communicating even though the fan is interposed, the storage space and the heat storage space are arranged in parallel by the operation of the refrigerator. To cool down. For this reason, in addition to the cool air that cools the storage space, it is necessary to supply extra cool air for cooling the heat storage material in the heat storage space, and the load on the refrigerator is inevitable. In addition, when it is necessary to rapidly freeze, it is necessary to supply more cold air as much as the heat storage material is cooled, and thus a large-capacity refrigerator is required. On the other hand, even if a large-capacity refrigerator is used, there is a problem that the cooling efficiency is lowered after sufficient cooling is completed.

  Moreover, in the thing of patent document 2, although the thermal storage material (panel) is arrange | positioned in the vicinity of the wall surface in a storage space, or a to-be-contained object, the thermal storage material is not arrange | positioned to the whole wall. For this reason, the portion where the heat storage material is disposed is maintained at a predetermined temperature, but the portion where the heat storage material is not disposed is affected by, for example, external solar heat, and the temperature rises. As a result, temperature unevenness occurs in the storage space. In order to solve this, it is necessary to increase the size of the refrigerator and the blower and supply more air (cold air) to the storage space.

  Moreover, in the thing of patent document 2, since the panel of heat storage material filling is arrange | positioned in the storage space, the panel must be cooled simultaneously with the storage space. It is inevitable that the load on the refrigerator increases.

  Therefore, after the storage is partitioned into a storage space and a heat storage space, cold air of a predetermined temperature is switched to one of the storage space and the heat storage space and supplied to cool one space at a time. It is conceivable to reduce the load on the machine.

  However, in that case, when supplying cool air to the heat storage space, in the initial stage, the temperature of the air in the heat storage space is higher than the cold air to be supplied from the refrigerator, and there is a large temperature difference between the two. When cold air is supplied, high temperature air in the heat storage space may be pushed out and supplied to the storage space as it is. At that time, there arises a problem that the temperature in the storage space fluctuates due to the supplied air.

  The present invention has been made in view of such points, and the object thereof is to improve the heat insulation efficiency in the storage space without using air delivery means such as a large-capacity or large-sized refrigerator. Further, it is intended to reduce the load of the air delivery means, and to prevent the air in the heat storage space from being supplied into the storage space when supplying air of a predetermined temperature to the heat storage space.

  In order to solve the above-mentioned problem, in the present invention, air of a predetermined temperature (cold air or the like) from the air sending means is switched to the storage space or the heat storage space by the switching means for the storage space and the heat storage space partitioned in the storage. Switched to only the space or both the storage space and the heat storage space, cooled one space at a time, etc., and connected the heat storage space and the air delivery means through a reflux path to supply air at a predetermined temperature to the heat storage space In some cases, air that has a temperature difference from the supplied air in the heat storage space is pushed out to the recirculation path to prevent the air from being supplied into the storage space.

  Specifically, according to the first aspect of the present invention, a storage room in which an external finish material is provided with a heat insulating material, a storage space in which storage objects are stored, and a latent heat storage material are stored inside the storage room. A partition wall partitioned into a heat storage space, an air sending means for generating and sending air of a predetermined temperature (cold air or warm air), and supplying air of a predetermined temperature sent by the air sending means to the storage space and the heat storage space Switching means for switching so that air of a predetermined temperature supplied by the air supply path is supplied only to the storage space, or to only the heat storage space, or both the storage space and the heat storage space, and the partition wall. Provided, a communication path communicating the storage space and the heat storage space, a communication path opening / closing means for opening and closing the communication path, a reflux path communicating the heat storage space and the suction portion of the air delivery means, and the reflux path Opening and closing hand that opens and closes When, and is characterized in that it comprises a.

  According to this configuration, when the storage space is cooled to a predetermined temperature by air having a predetermined temperature generated by the air delivery unit, for example, air having a predetermined temperature is supplied from the air delivery unit via the air supply path to the storage space. The switching means is switched so as not to be supplied to the heat storage space. At the same time, the communication path opening / closing means closes the communication path, and the return path opening / closing means also closes the return path. In this state, the air delivered by the air delivery means is not supplied to the heat storage space, but is supplied to the storage space through the air supply path. Thereby, it is possible to preferentially cool the storage space until the temperature reaches a predetermined temperature.

  On the other hand, when cooling the heat storage space having the latent heat storage material to a predetermined temperature, for example, air of a predetermined temperature via the air supply path is supplied from the air delivery means to the heat storage space and not to the storage space. Thus, the switching means is switched, and at the same time, the communication path opening / closing means closes the communication path, and the reflux path opening / closing means opens the reflux path. In this state, the air sent out by the air sending means is not supplied to the storage space but is supplied to the heat storage space through the air supply path, or is supplied to the storage space and the heat storage space. Is transferred from the liquid phase to the solid phase to dissipate heat, or from the solid phase to the liquid phase to absorb heat, and then introduced into the reflux path, and returns to the suction portion of the air delivery means via the reflux path. Thus, the heat storage material in the heat storage space can be efficiently cooled or the like. In addition, after the temperature in the heat storage space reaches a predetermined temperature, if the reflux path opening / closing means is operated to close, the temperature in the heat storage space is predetermined by the heat stored in the latent heat storage material in the heat storage space. Kept at temperature.

  Thus, the air from the air delivery means is not supplied to the storage space and the heat storage space at the same time, but is supplied preferentially to one of the storage space or the heat storage space, and the one space is preferentially cooled. Therefore, the air sending means does not need to send air for cooling the heat storage material in the heat storage space at the same time in addition to air for cooling the storage space, and cools one space. Therefore, if a necessary amount of air is sent out, each space can reach a predetermined temperature. Therefore, not only can the air delivery means be operated efficiently, but also its load can be reduced, and further, there is no need to increase the size of the air delivery means.

  Further, in the initial state when the heat storage space is cooled, the communication path opening / closing means closes the communication path, and at the same time, the return path opening / closing means opens the return path. Unaired air is pushed out to the reflux path as it is and is not introduced into the storage space. Therefore, the temperature in the storage space does not fluctuate when the air in the heat storage space that is not cooled is introduced into the storage space, and the heat retention efficiency of the storage space can be improved.

  Further, when there is a possibility that the temperature in the storage space may fluctuate, the storage space and the heat storage space may be communicated by opening the communication path opening / closing means. As a result, it becomes possible to supply air at a predetermined temperature in the heat storage space to the storage space to reduce the temperature change, and to improve the heat retention efficiency of the storage space.

  In addition, since the external finishing material of the storage is provided with a heat insulating material, for example, even when the heat storage space is provided on one surface of the storage that is greatly affected by solar heat, the influence of solar heat can be suppressed.

  According to a second invention, in the first invention, the storage space temperature detection means for detecting the temperature of the storage space, the heat storage space temperature detection means for detecting the temperature of the heat storage space, and the both temperature detection means, And a control means for controlling the switching means and the reflux path opening / closing means based on the detected temperatures.

  According to this configuration, the temperature in the storage space is detected by the storage space temperature detection means, and the temperature in the heat storage space is detected by the heat storage space temperature detection means, respectively, and the switching means is switched by the control means based on the detected temperature, for example. Is controlled such that air of a predetermined temperature is supplied to one of the storage space and the heat storage space. Therefore, one or both of the storage space and the heat storage space are not excessively cooled, and conversely, the cooling or the like is not insufficient, and the heat retention efficiency and heat retention accuracy in the refrigerator can be improved. Further, when the temperature detected by the heat storage space temperature detecting means reaches a predetermined temperature, the control means controls the recirculation path opening / closing means to be closed. As a result, it is possible to prevent the air in the heat storage space that has reached a predetermined temperature from flowing out into the reflux path.

  In a third aspect based on the second aspect, the control means first controls the switching means so that air from the air supply path is supplied only to the storage space, and the return path opening / closing means. When the temperature of the storage space detected by the storage space temperature detecting means reaches a predetermined temperature, only the heat storage space or both the storage space and the heat storage space are connected from the air supply path. The switching means is controlled so as to be supplied, and the reflux path opening / closing means is controlled to open.

  According to this, first, the switching means is controlled so that air from the air supply path is supplied to the storage space, the return path opening / closing means is closed to close the return path, and the storage space is preferentially cooled. Is equal. Thereafter, when the temperature in the storage space detected by the storage space temperature detection means reaches a predetermined temperature, the switching means is controlled so that air from the air supply path is introduced into the heat storage space, and the reflux path is opened and closed. The means is opened to open the reflux path, and the heat storage space is cooled. For this reason, it is not necessary to send an amount of air that cools the storage space and the heat storage space at the same time, and if a necessary amount of air is sent to cool one space, each space is heated to a predetermined temperature. The load on the air delivery means can be reliably reduced without increasing the size of the air delivery means.

  According to a fourth aspect of the present invention, in the second or third aspect of the present invention, a stop detection unit that detects an operation stop state of the air delivery unit is provided. When detected, the communication path opening / closing means is controlled to open.

  Moreover, 5th invention is provided with the door which partitions off storage space and the storage outside in any one of the said 2nd-4th invention, and the door open detection means which detects the open state of this door. The control means controls to open the communication path opening / closing means when the door open detection means detects the door open state.

  According to these, when the operation of the air delivery means is stopped or the door of the storage space is opened, the temperature in the storage space is likely to fluctuate from the predetermined temperature due to the external influence. The operation stop state of the air delivery means is detected by the stop detection means and the door open state is detected by the door opening detection means, respectively, and the communication passage opening / closing means is opened by the control means. Thereby, since the air of the predetermined temperature stored in the heat storage space can be supplied to the storage space, the heat retention efficiency in the storage space can be improved, and temperature unevenness is prevented from occurring in the storage space. be able to.

  According to a sixth aspect of the invention, in any one of the first to fifth aspects of the invention, the air delivery means generates and sends out cool air.

  According to this configuration, when the object to be stored is stored in the storage space in the refrigerated state or in the frozen state, the operation stability and the operation reliability as the entire storage device can be improved.

  According to a seventh invention, in any one of the first to sixth inventions, the heat storage space is arranged on at least one surface of a storage.

  According to this configuration, it is possible to reduce the temperature unevenness of the storage while effectively suppressing the heat flowing through from the outside. In particular, in the case of the sixth invention, the heat storage space is arranged on the ceiling side of the storage, so that when the opening / closing means is opened, the cold air accumulated in the heat storage space is lower than the heat storage space. Therefore, the heat insulation efficiency in the storage space can be further improved.

  According to an eighth invention, in any one of the first to seventh inventions, the heat storage space has a heat insulating structure in which a heat insulating material is provided on the partition wall.

  According to this configuration, since the heat storage space is also provided with the heat insulating material in the partition wall, heat transfer between the air in the storage space and the air in the storage space can be suppressed.

  A ninth invention relates to a vehicle, and is characterized in that the invention described in any one of the first to eighth inventions is mounted.

  The tenth invention relates to a ship and is characterized in that the invention described in any one of the first to eighth inventions is mounted.

  According to these inventions, it is possible to provide a vehicle or a ship equipped with a storage device that does not require a large-sized air delivery means and has improved heat retention efficiency in the storage space.

  According to the present invention, air at a predetermined temperature from the air delivery means can be appropriately switched to only the storage space, or only the heat storage space, or both the storage space and the heat storage space, and one of the two spaces can be cooled. Therefore, it is not always necessary for the air sending means to send the air for cooling the heat storage material in the heat storage space at the same time in addition to the air for cooling the storage space, and the air for cooling only one space. Should be sent. Therefore, the load on the air delivery means is reduced, and it is not necessary to increase the size of the air delivery means. In addition, by opening the communication path opening / closing means to connect the storage space and the heat storage space, air at a predetermined temperature in the heat storage space is supplied to the storage space, and temperature fluctuations in the storage space are suppressed. Therefore, the heat insulation efficiency in the same space can be improved. Further, the heat storage space and the suction portion of the air delivery means are communicated with each other through a reflux path, and in the initial stage of cooling the heat storage space, air that is not cooled in the heat storage space is pushed out to the reflux path, and the air enters the storage space. Prevents the air in the heat storage space that is not cooled from being introduced into the storage space and the temperature in the storage space from fluctuating, thereby improving the heat retention efficiency of the storage space. Can be made.

It is a sectional side view of the freezer as a storage apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the freezer truck which has a storage apparatus. It is a block diagram which shows the cooling system of a storage apparatus. It is a flowchart figure which shows the control which concerns on the cooling of the storage space and heat storage space which are performed in a control apparatus. It is a flowchart figure which shows the control which concerns on opening / closing of the opening / closing damper performed in a control apparatus. FIG. 3 is a view corresponding to FIG. 1 and showing a state in which an open / close damper is closed in Embodiment 2. FIG. 6 is a view corresponding to FIG. 1 and showing a state in which the open / close damper is opened in Embodiment 2.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 2 is a perspective view showing the entire refrigerator vehicle V. FIG. This refrigerator car V is equipped with a storage device A according to Embodiment 1 of the present invention. This storage device A has, for example, a rectangular parallelepiped box-shaped freezer 1 (storage) that extends long in the longitudinal direction of the vehicle. The left and right doors 2 are opened to rotate around, and when the object to be frozen is taken in and out of the freezer 1, one or both of the doors 2 are opened. .

  FIG. 1 is a side sectional view of the freezer 1 in the vehicle front-rear direction. The left side of FIG. 1 corresponds to the front side of the vehicle, and the right side corresponds to the rear side of the vehicle. As for this freezer 1, a wall part consists of panel materials 1a (external finishing material), such as stainless steel (SUS), aluminum, FRP, etc., and the heat insulating material 13 (part of the thermal storage space 4 mentioned later) inside the panel material 1a Is shown only on the ceiling side). The freezer 1 is provided with three spaces, a storage space 3, a heat storage space 4, and a refrigerator storage space 5, and the spaces 3 to 5 are partitioned by partition walls 7 and 8. The storage space 3 and the heat storage space 4 are disposed on the rear side of the freezer 1, and the rear portion of the freezer 1 is located below the freezer 1 by a partition wall 7 extending horizontally in the front-rear and left-right directions. It is partitioned into a storage space 3 that occupies substantially the whole and a heat storage space 4 located on the upper side. A communication passage 10 that communicates the storage space 3 and the heat storage space 4 is opened at the rear end portion (right end portion in FIG. 1) of the partition wall 7. An opening / closing damper 11 (communication path opening / closing means) that opens and closes the communication path 10 is swingably attached to the upper part of the rear wall inner surface of the freezer 1. The open / close damper 11 is driven by a motor 23 (see FIG. 4). As shown by a solid line in FIG. 1, when the open / close damper 11 is in the closed position, the communication path 10 is closed and the storage damper 11 is closed. While the communication between the space 3 and the heat storage space 4 is completely blocked, as shown by the phantom line in FIG. 1, when the open / close damper 11 is in the open position, the communication path 10 is opened and the two spaces 3 and 4 are opened. Has come to communicate.

  The storage space 3 is a space for storing an object to be frozen (object to be stored), and has a predetermined temperature (for example, −20 ° C.) by cold air sent from a refrigerator 16 provided in the refrigerator storage space 5 described later. And the like, and frozen objects such as frozen foods are kept in a frozen state.

  On the other hand, the heat storage space 4 is a space for supplementarily introducing air of a predetermined temperature (for example, −20 ° C. or lower) necessary for keeping the object to be frozen in the storage space 3 in the frozen state. The heat insulating material 13 is installed on the lower wall portion (the partition wall 7 side) in the heat storage space 4 in the same manner as the wall portion of the freezer 1, and the lower surface of the heat insulating material 13 on the upper wall portion (ceiling side of the freezer 1) has latent heat. A heat storage material 14 is disposed, and an air layer 4 a is formed between the latent heat storage material 14 and the lower heat insulating material 13. The latent heat storage material 14 is made of, for example, paraffin, and is cooled by the air in the heat storage space 4 (air layer 4a) to be in a heat dissipation state and transition from a liquid phase to a solid phase. At the time of phase transition to the liquid phase, an endothermic state is obtained, and the air in the heat storage space 4 (air layer 4a) is cooled, so that the temperature of the air layer 4a in the heat storage space 4 is maintained at a predetermined temperature. There are a plurality of types of latent heat storage materials 14, and a material corresponding to the temperature required for freezing the object to be frozen in the storage space 3 may be selected.

  The refrigerator storage space 5 is arranged on the front side of the freezer 1 and is partitioned from the storage space 3 and the heat storage space 4 by a partition wall 8 extending in the vertical direction, for example.

  A refrigerator 16 for generating cool air necessary for the storage space 3 and the heat storage space 4 is installed in one half of the refrigerator storage space 5 (lower part in the illustrated example). Although not shown, the refrigerator 16 is a refrigeration cycle in which high-pressure gas refrigerant discharged from a compressor driven by an in-vehicle engine is condensed into a liquid refrigerant by a condenser, and then the liquid refrigerant is expanded and evaporated by an evaporator. It is provided, and cold is generated by the evaporation heat of the refrigerant in the evaporator, and the air is cooled by the cold. The refrigerator 16 includes, for example, a lower portion of the casing 16 a, a first intake port 17 that takes air (fresh air) into the refrigerator 16 from the outside of the freezer 1, and a second intake port 18 that takes air in the storage space 3. And a suction port 31 for taking in air returned from the heat storage space 4 to the refrigerator 16 through a reflux path 29 to be described later, and casing the air from the outside of the freezer 1, the storage space 3 or the heat storage space 4. After taking in in 16a and cooling the air and producing | generating cold air, the cold air is sent out from the cold air delivery port 16b of the casing 16a.

  In the other half (the upper part in the illustrated example) of the refrigerator storage space 5, there is an air supply path 19 for supplying cold air sent from the cold air outlet 16 b of the refrigerator 16 to the storage space 3 and the heat storage space 4. Is provided. The air supply path 19 is formed in, for example, the duct 19 a, and its upstream end (one end) is connected to the cold air outlet 16 b of the refrigerator 16. The downstream side portion (the other end side portion) of the air supply passage 19 is branched into a storage space side branch passage 19b and a heat storage space side branch passage 19d on the way, and the downstream end of the storage space side branch passage 19b is a partition wall 8. Is connected to a cold air intake 19c that is open to communicate with the storage space 3 near the upper end of the storage space 3 and communicates with the storage space 3 via the cold air intake 19c. On the other hand, the downstream end of the heat storage space side branch channel 19d extends above the storage space side branch channel 19b, and is then opened at the upper end of the partition wall 8 so as to communicate with the air layer 4a of the heat storage space 4. 19e is connected to the heat storage space 4 through the cold air intake 19e. A switching damper 20 (switching means) is swingably attached to the branch portion of the air supply path 19. The switching damper 20 is driven by a motor 24 (see FIG. 3) so that the cold air delivered from the refrigerator 16 and supplied by the air supply path 19 is supplied to one of the storage space 3 and the heat storage space 4. When the switching damper 20 closes the heat storage space side branch path 19d and opens the storage space side branch path 19b as shown by the solid line in FIG. 1, the cool air is supplied to the storage space 3. On the other hand, as shown by the phantom line in FIG. 1, when the switching damper 20 closes the storage space side branch path 19 b and opens the heat storage space side branch path 19 d, cold air is supplied to the heat storage space 4.

  Also, in the air supply path 19 between the upstream side of the branch path, that is, between the cold air outlet 16b of the refrigerator 16, the cold air sent from the refrigerator 16 as air is shown in FIG. A blower 21 is provided for supplying the storage space side branch passage 19b or the heat storage space side branch passage 19d of the supply passage 19.

  Further, for example, above the heat storage space 4 (on the ceiling side of the freezer 1) or in front of the refrigerator storage space 5 (left side in FIG. 1), the heat storage space 4 and the refrigerator 16 in the refrigerator storage space 5 are arranged. A reflux path 29 that connects the suction port 31 is provided. The reflux path 29 takes in air having a temperature higher than a predetermined temperature before cooling existing in the heat storage space 4 (air layer 4 a) at an early stage of cooling the heat storage space 4, and discharges it from the heat storage space 4. This is for refluxing to the refrigerator 16. A communication portion 29 a that communicates the reflux path 29 and the heat storage space 4 is opened at the rear end portion of the upper wall portion of the heat storage space 4, and the reflux path 29 extends from the communication portion 29 a to the front end portion of the freezer 1. 1 extends along the outer surface of the upper wall 1, then bends downward at the front end portion and extends along the outer surface of the front wall, and at the position corresponding to the refrigerator 16 in the refrigerator storage space 5, the suction port 31 of the refrigerator 16. It is connected to the. A return path damper 30 that opens and closes the communication portion 29a of the return path 29 is swingably attached to a position near the upper part of the inner surface of the rear wall of the freezer 1 and higher than the open / close damper 11. The return path damper 30 is driven by a motor 32 (see FIG. 3). When the return path damper 30 is in the closed position as shown by a solid line in FIG. 1, the heat storage space 4 and the refrigerator 16 are shut off. On the other hand, as shown by the phantom line in FIG. 1, when the reflux path damper 30 is in the open position, the heat storage space 4 and the refrigerator 16 communicate with each other.

  Next, the cooling system of the freezer 1 will be described. FIG. 3 is a block diagram showing a cooling system of the freezer 1. The storage device A includes a control device 22, and various controls including switching control of the switching damper 20, opening / closing control of the opening / closing damper 11, and opening / closing control of the reflux path damper 30 are performed by the control device 22.

  Specifically, the freezer 1 is provided with a door opening sensor 25 as door opening detecting means for detecting the open / closed state of the door 2 on the rear surface.

  In the storage space 3, for example, a plurality (two in the figure) of storage space temperature sensors 12, 12 that detect the temperature of the storage space 3 are installed. One of them is installed, for example, near the center of the storage space 3 in a state supported by a support portion (not shown), and the other is a portion where the temperature change is remarkable due to opening and closing of the door 2 at the rear end portion on the floor, for example. The temperature in the storage space 3 is detected by these.

  Furthermore, a plurality (two in the figure) of heat storage space temperature sensors 15 and 15 for detecting the temperature of the heat storage space 4 are installed in the heat storage space 4. One of them is installed, for example, in an air layer 4a near the front and rear center of the heat storage space 4 in a state supported by a support portion (not shown), and the other is a temperature by opening and closing the open / close damper 11 in the vicinity of the communication path 10, for example. It is installed in the part where the change is remarkable, and the temperature in the heat storage space 4 is detected by these.

  Moreover, the refrigerator stop sensor 26 which detects the operation stop state of the said refrigerator 16 accompanying the stop of the driving | operation of the said vehicle-mounted engine is provided.

  The output signal of the door opening sensor 25, the output signal of the storage space temperature sensors 12, 12, the output signal of the heat storage space temperature sensors 15, 15 and the output signal of the refrigerator stop sensor 26 are all input to the control device 22. By controlling the driving of the motors 23, 24, 32 of the dampers 11, 20, 30 based on the detection information obtained from the door opening sensor 25, the temperature sensors 12, 15, and the refrigerator stop sensor 26, respectively. The storage space 3 and the heat storage space 4 of the freezer 1 are maintained at a predetermined temperature.

  Specific control performed in the control device 22 will be described with reference to FIGS. FIG. 4 shows a flow when the refrigerator 16 is driven from a stopped state to cool the storage space 3 and the heat storage space 4. In the initial state, the refrigerator 16 and the blower 21 are stopped, and at the same time, the open / close damper 11 is connected to the communication path 10. Is opened, and the reflux path damper 30 closes the communication portion 29 a of the reflux path 29. From this initial state, first, in step S11, the motor 23 is driven, the opening / closing damper 11 is closed, and the communication path 10 is closed. In the subsequent step S12, the motor 24 is driven, and the switching damper 20 is switched so that the storage space side branch 19b is opened and the heat storage space side branch 19d is closed and cold air is supplied to the storage space 3. In step S13, the refrigerator 16 is activated by the operation of the in-vehicle engine, generates cool air and sends it to the air supply path 19, and operates the blower 21 to supply cool air at a predetermined temperature to the storage space 3. To do.

  In subsequent step S14, the temperature of the storage space 3 is detected at two locations by the two temperature sensors 12 and 12 in the storage space 3. In step S15, it is determined whether or not each detected temperature has reached the set temperature. If the detected temperature in one or both locations has not reached the set temperature, the process proceeds to step S16. In the same manner as before, the switching damper 20 is switched so that the storage space side branch 19b is opened, and the air flow to the storage space 3 is maintained while the open / close damper 11 is kept closed. To continue. Then, it returns to step S14.

  On the other hand, if the detected temperatures at both locations have reached the set temperature and the determination in step S15 is YES, it is determined that the cooling in the storage space 3 has ended, and the process proceeds to step S17. In this step S17, the motor 32 is driven, the reflux path damper 30 is opened to open the communication portion 29a, and the heat storage space 4 and the suction port 31 of the freezer 16 are communicated. Thereafter, in step S18, the motor 24 is driven, and the switching damper 20 is switched so that the heat storage space side branch 19d is opened and the storage space side branch 19b is closed. Thereby, the cold air generated by the refrigerator 16 is supplied to the heat storage space 4 side (air layer 4a) through the air supply path 19.

  In the next step S19, the temperature of the heat storage space 4 is detected at two locations by the two temperature sensors 15 and 15 in the heat storage space 4. In step S20, as in the case of the storage space 3, it is determined whether or not each detected temperature has reached the set temperature, and when one or both of the locations has not reached the set temperature, NO. Then, the process proceeds to step S21, the switching damper 20 is switched so that the heat storage space side branch 19d is opened, and the open / close damper 11 is kept open so that the communication path 10 is opened. The blowing is continued, and then the process returns to step S19.

  On the other hand, when it is determined in step S20 that both of the portions have reached the set temperature, it is determined that the cooling in the heat storage space 4 is completed, and the process proceeds to step S22. In step S22, the motor 24 is driven to switch the switching damper 20 so that the storage space side branch path 19b is opened, and in step S23, the motor 32 is driven to close the return path damper 30 and the connecting portion 29a of the return path 29. To make it close. Thereafter, this state is maintained, and the cold air generated by the refrigerator 16 is preferentially introduced into the storage space 3. Thereby, the flow which cools storage space 3 and heat storage space 4 is completed.

  On the other hand, FIG. 5 shows a flow when the storage space 3 is cooled when the refrigerator 16 is stopped or when the door 2 on the rear surface of the freezer 1 is opened. As described above, after the cooling of the storage space 3 and the heat storage space 4 is completed, the switching damper 20 is switched so that the storage space side branch 19b is opened, and the open / close damper 11 and the return path damper 30 are closed. Yes (see steps S11, S22, S23 in FIG. 4). In this state, whether the refrigerator 16 is brought into an operation stop state when the engine of the refrigerator car V is stopped from step S31, or is the door 2 of the freezer 1 opened for taking in / out the object to be frozen in the storage space 3 or the like? Then, it is determined whether each of the states has been detected by the refrigerator stop sensor 26 or the door opening sensor 25. When the determination in step S31 is YES, the process proceeds to step S32, the motor 23 is driven, and the open / close damper 11 is opened. Thereby, the storage space 3 and the heat storage space 4 are communicated, and the cooled air is introduced from the heat storage space 4 to the storage space 3. Then, it returns to step S31.

  On the other hand, when the engine is in operation and the refrigerator 16 is in operation or the door 2 is closed, NO is determined in step S31, and the process proceeds to step S33 to drive the motor 23. The open / close damper 11 is kept closed. Thereby, the flow ends.

  Next, the operation of the first embodiment will be described.

  First, when the storage space 3 is cooled, as described above, the switching damper 20 is switched so that the storage space side branch 19b is opened and the heat storage space side branch 19d is closed, and at the same time, the open / close damper 11 is connected. The passage 10 is closed, and the reflux path damper 30 closes the connecting portion 29 a of the reflux path 29. In this state, the refrigerator 16 takes in air from the outside through the first air inlet 17, generates cold air at a predetermined temperature in the refrigerator 16, and sends the cold air from the cold air outlet 16 b to the air supply path 19. Since the storage space side branch channel 19b is opened and the heat storage space side branch channel 19d is closed, the air supply channel 19 is not supplied to the heat storage space side branch channel 19d but is stored in the storage space by the blower 21. The air is supplied to the side branch 19 b and supplied to the storage space 3 from the cold air intake 19 c of the storage space 3. The air supplied to the storage space 3 spreads throughout the storage space 3, cools the storage space 3, and is then collected by the refrigerator 16 through the second intake port 18 communicating with the storage space 3. Thereafter, the outside air or the collected air is further taken into the refrigerator 16 where a new predetermined temperature of cold air is generated and the same operation is repeated, whereby the storage space 3 is cooled and reaches the set temperature. To do.

  When the heat storage space 4 is cooled after the storage space 3 is cooled, the switching damper 20 is switched so that the storage space side branch 19b is closed and the heat storage space side branch 19d is opened as described above. At the same time, the open / close damper 11 keeps the communication path 10 closed, and the reflux path damper 30 is opened to open the communication part 29a of the reflux path 29. In this state, similarly to the cooling operation of the storage space 3 described above, the refrigerator 16 takes in air from the outside to generate cold air at a predetermined temperature, and sends the cold air from the cold air outlet 16b to the air supply path 19. Since the storage space side branch passage 19b is closed and the heat storage space side branch passage 19d is opened in the air supply passage 19, the sent cold air is not supplied to the storage space side branch passage 19b and is stored by the blower 21. It is supplied to the space side branch 19 d and supplied to the heat storage space 4 from the cold air intake 19 e of the heat storage space 4. The cool air supplied to the heat storage space 4 passes through the air layer 4a while pushing the uncooled air in the air layer 4a in the heat storage space 4 from the communication part 29a to the reflux path 29, and latent heat storage facing the air layer 4a. After the heat is radiated to the material 14, it is recovered from the suction port 31 of the refrigerator 16 to the refrigerator 16 through the communication portion 29 a and the reflux path 29. Thereafter, external air or recovered air is further taken into the refrigerator 16 to generate new cold air at a predetermined temperature, and the same operation is repeated. Then, if the latent heat storage material 14 is cooled and undergoes a phase transition from the liquid phase to the solid phase, cold air from the refrigerator 16 is supplied by the endothermic action when the latent heat storage material 14 undergoes a phase transition from the solid phase to the liquid phase. At least the air in the heat storage space 4 is maintained at a predetermined temperature.

  After cooling of the storage space 3 and the heat storage space 4, as described above, the switching damper 20 is switched so that the storage space side branch 19b is opened and the heat storage space side branch 19d is closed, At the same time, the open / close damper 11 maintains the closed state of the communication path 10, and the return path damper 30 is controlled to close the communication part 29 a of the return path 29. Thereby, the cold air sent out from the refrigerator 16 is supplied only to the storage space 3 without being supplied to the heat storage space 4, and the inside of the storage space 3 can be maintained at a predetermined temperature.

  When the operation of the refrigerator 16 is stopped or when the door 2 is opened, as described above, the opening / closing damper 11 is controlled and the communication path 10 is opened, so that the predetermined temperature in the heat storage space 4 is reached. Air is introduced into the storage space 3 to maintain the storage space 3 at a predetermined temperature.

  Therefore, in Embodiment 1 described above, the inside of the freezer 1 of the storage device A is partitioned into the storage space 3 and the heat storage space 4, and the switching operation of the switching damper 20 and the opening / closing operation of the opening / closing damper 11 are controlled. The storage space 3 or the heat storage space 4 can be cooled for each of the spaces 3 and 4, respectively. Thereby, the refrigerator 16 does not always need to send out the cold air for cooling the latent heat storage material 14 in the heat storage space 4 in addition to the cold air for cooling the storage space 3 at one time. Since it suffices to send out only the cool air to be cooled, the load on the refrigerator 16 is reduced and the size of the refrigerator 16 need not be increased.

  Further, the heat storage space 4 and the suction port 31 of the refrigerator 16 are connected by the reflux path 29, and in the initial stage of cooling the heat storage space 4, uncooled air in the heat storage space 4 is pushed out to the reflux path 29, and the air Is not introduced into the storage space 3. Therefore, it is possible to prevent the air in the heat storage space 4 that is not cooled from being introduced into the storage space 3 and the temperature in the storage space 3 to fluctuate, and the cooling efficiency of the storage space 3 can be improved.

  Furthermore, temperature sensors 12 and 15 are provided in the storage space 3 and the heat storage space 4, respectively, and the switching operation of the switching damper 20, the opening and closing operation of the open / close damper 11, based on the detected temperatures of the temperature sensors 12 and 15, Since the opening / closing operation of the reflux path damper 30 is controlled and the storage space 3 and the heat storage space 4 are sequentially cooled, one or both of the storage space 3 and the heat storage space 4 are excessively cooled, or conversely, the cooling is insufficient. The heat retention efficiency and heat retention accuracy in the freezer 1 can be improved. Moreover, the temperature sensors 12 and 15 are provided at a plurality of locations in the storage space 3 and the heat storage space 4, and the cooling operation is continued until the temperature sensors 12 and 15 detect the set temperature. No temperature unevenness occurs in the heat storage space 4.

  In addition, when the operation of the refrigerator 16 is stopped or the door 2 is opened, and the temperature in the storage space 3 is likely to fluctuate from a predetermined temperature due to external influences, The drive stop state is detected by the stop sensor 26, and the open state of the door 2 is detected by the door open sensor 25. Under the control of the control device 22, the open / close damper 11 opens the communication path 10. Thereby, since the cool air stored in the heat storage space 4 can be introduced into the storage space 3, the heat insulation efficiency in the storage space 3 can be improved, and when the operation of the refrigerator 16 is stopped and the door 2 Even when the is opened, it is possible to prevent the occurrence of temperature unevenness in the storage space 3.

  Furthermore, since the heat storage space 4 is arranged on the ceiling side of the freezer 1, the open / close damper 11 is opened and the communication path 10 is opened so that the cold air in the heat storage space 4 is stored below the heat storage space 4. It automatically flows down into the space 3 and is introduced, so that the heat retention efficiency of the storage space 3 can be further improved.

  Further, since the reflux path 29 is disposed above the heat storage space 4, light air that is not cooled in the heat storage space 4 easily escapes to the upper reflux path 29, and the refrigerator passes through the reflux path 29. The flow returning to 16 becomes smooth, and the cooling efficiency of the heat storage space 4 can be improved.

  Furthermore, since the heat insulating material 13 is provided in the wall part of the freezer 1, even if the heat storage space 4 is arranged on the ceiling side that is easily affected by solar heat, the influence of solar heat can be suppressed. Moreover, since the heat insulating material 13 is also provided on the partition wall 7 side below the heat storage space 4, it is possible to suppress heat transfer between the air in the storage space 3 and the air in the heat storage space 4. .

(Embodiment 2)
6 and 7 show a freezer 1 according to Embodiment 2 of the present invention. In the following description of this embodiment, the same parts as those shown in FIGS.

  In the present embodiment, the air supply path 19 is different from that of the first embodiment. That is, in the first embodiment, the air supply path 19 communicates with both the storage space 3 and the heat storage space 4, whereas in the present embodiment, it communicates only with the storage space 3. Accordingly, the present embodiment is also different in that the switching damper 20 is not provided. Furthermore, in the first embodiment, the communication path 10 and the open / close damper 11 are provided only on the rear end side of the partition wall 7 that partitions the storage space 3 and the heat storage space 4, whereas in the second embodiment, the partition wall 7 A communication path 27 and an opening / closing damper 28 for opening and closing the communication path 27 are also provided at the front end, and a motor (not shown) of the opening / closing damper 28 is controlled by the control device 22. In the present embodiment, the open / close damper 28 constitutes a switching means. Other configurations are the same as those of the first embodiment.

  When the storage space 3 is cooled with such a structure, as shown in FIG. 6, first, the open / close dampers 11 and 28 are closed to close both the communication passages 10 and 27. In this state, the refrigerator 16 is operated to generate cool air and send it to the air supply path 19, and the air blower 21 is operated to supply cold air having a predetermined temperature to the storage space 3. The two temperature sensors 12 and 12 in the storage space 3 detect the temperature of the storage space 3 at two locations. If the detected temperatures do not reach the set temperature, the open / close dampers 11 and 28 are connected. While the air flow is continued while the passages 10 and 27 are kept closed, the cooling of the storage space 3 is finished when the detected temperatures reach the set temperatures.

  When the heat storage space 4 is cooled after the storage space 3 is cooled, as shown in FIG. 7, the open / close damper 28 is opened to open the communication path 27, while the open / close damper 11 is closed to open the communication path 10. The closed state is maintained, and the reflux path damper 30 is opened to open the communication portion 29a of the reflux path 29. In this state, when cool air is supplied to the storage space 3 as described above, the cool air is supplied to the storage space 3 and also to the heat storage space 4 from the communication path 27 as indicated by arrows in FIG. The cool air supplied to the heat storage space 4 radiates heat that has not yet been cooled in the heat storage space 4 to the heat storage material 14 through the air layer 4 a while pushing the air to the heat return path 29, and then refrigerates through the reflux path 29. The refrigerant is collected from the suction port 31 of the machine 16 into the refrigerator 16. The two temperature sensors 15 and 15 in the heat storage space 4 detect the temperature of the heat storage space 4 at two locations, and the open / close damper 28 opens the communication path 27 until the detected temperatures reach the set temperatures. The open / close damper 11 closes the communication path 10, and the reflux path damper 30 continues to blow while keeping the connection portion 29 a of the reflux path 29 open. On the other hand, when each detected temperature reaches the set temperature, the cooling of the heat storage space 4 ends.

  After the cooling of the heat storage space 4 is completed, the opening / closing damper 28 is closed again to close the communication path 27, and the return path damper 30 is closed to close the communication portion 29a of the return path 29 (see FIG. 6). State shown). Thereby, the cold air sent out from the refrigerator 16 is supplied only to the storage space 3 without being supplied to the heat storage space 4, and the inside of the storage space 3 is maintained at a predetermined temperature.

  When the operation of the refrigerator 16 is stopped or when the door 2 is opened, the open / close dampers 11 and 28 are controlled to open the communication passages 10 and 27, respectively, so that a predetermined temperature in the heat storage space 4 is reached. The air is introduced into the storage space 3 to maintain the storage space 3 at a predetermined temperature.

  Thus, after only the storage space 3 is cooled and the storage space 3 reaches a predetermined temperature, the opening / closing damper 28 is opened to open the communication path 27 and the reflux path damper 30 is opened. If the communication portion 29a of the reflux path 29 is opened, the cold air is supplied to the heat storage space 4 together with the storage space 3, and the heat storage space 4 is cooled. Can do.

  Further, by providing the communication passages 10 and 27 in both the front end portion and the rear end portion of the partition wall 7, both the open / close dampers 11 and 28 on both sides can be opened when the refrigerator 16 is in the operation stop state or the door 2 is in the open state. By opening the communication passages 10 and 27 by opening, the cool air in the heat storage space 4 can be efficiently supplied to the storage space 3.

(Other embodiments)
In the said embodiment, although the thermal storage space 4 is arrange | positioned at the ceiling side of the freezer 1, you may arrange | position not only to this but at least one surface of the freezer 1, for example, the side surface side or floor side of the freezer 1.

  Moreover, in the said embodiment, although the reflux path 29 is arrange | positioned so that it may extend toward the front side along the upper wall outer surface, it is not restricted to this, For example, it extends toward the front side along the side wall outer surface. It may be arranged as follows.

  Furthermore, in the said embodiment, the temperature sensors 12 and 12 are provided in the center of the storage space 3, and the rear-end part on a floor, respectively, and the temperature sensors 15 and 15 are each provided in the center of the thermal storage space 4, and the communicating path 10 vicinity. However, the present invention is not limited to this, and may be provided at any location in the storage space 3 and the heat storage space 4. For example, if it arrange | positions between the heat insulating material 13 and the thermal storage material 14 by the side of the ceiling in the thermal storage space 4, the temperature of the thermal storage material 14 can be detected correctly. Further, each of the spaces 3 and 4 may be provided with one place in one or both spaces 3 and 4 instead of two places, or may be provided in one or both spaces 3 and 4 with three or more places.

  Moreover, in the said embodiment, although the communicating path was provided in one place or two places of the partition 7, it is not restricted to this, You may provide three or more places. In this case, it is necessary to arrange open / close dampers corresponding to the number of communication paths.

  Further, in the above embodiment, the swing dampers 20, 11, 28, 30 are used for switching the air supply path 19, opening / closing the communication paths 10, 27, and opening / closing the reflux path 29, but the present invention is not limited thereto. For example, a slide-type damper driven by a motor may be used.

  Moreover, although the said embodiment is an example of the freezer truck V in which the storage apparatus A is mounted, it is not restricted to this, For example, it is good also as a ship mounted with the storage apparatus A. Moreover, the stationary container of only the storage A may be sufficient.

  Furthermore, the storage device A is the freezer 1 using the refrigerator 16, but is not limited to this, and for example, normal temperature or high temperature air is sent out using a heater or the like as an air sending means, and the storage space is created by the air. You may make it maintain 3 to normal temperature or high temperature, ie, constant temperature. In addition, when maintaining at high temperature, it is desirable to provide the thermal storage space 4 not on the ceiling side but on the floor side.

  Further, the constituent elements of the above embodiments may be arbitrarily combined without departing from the spirit of the present invention.

  INDUSTRIAL APPLICABILITY The present invention is useful for an application in which the heat retention efficiency in the storage space is improved and the load of the air delivery means is required to be reduced without using an air delivery means such as a large capacity or large refrigerator. .

1 Freezer (storage)
1a Panel material (external finishing material)
2 Door 3 Storage space 4 Thermal storage space 7, 8 Bulkhead 10, 27 Communication path 11, 28 Opening / closing damper (communication path opening / closing means)
12 Temperature sensor (Storage space temperature detection means)
13 Thermal insulation material 14 Thermal storage material 15 Temperature sensor (thermal storage space temperature detection means)
16 Refrigerator (Air delivery means)
19 Air supply path 20 Switching damper (switching means)
21 Blower 22 Control device (control means)
23, 24, 32 Motor 25 Door open sensor (door open detection means)
26 Refrigerator stop sensor (stop detection means)
29 Reflux path 30 Reflux path damper (Reflux path opening / closing means)
31 Suction port V Refrigeration vehicle A Storage device

Claims (10)

A storage room with a thermal insulation on the external finish,
A partition that divides the interior of the storage into a storage space in which a storage object is stored and a heat storage space in which a latent heat storage material is stored;
Air delivery means for producing and delivering air of a predetermined temperature;
An air supply path for supplying air of a predetermined temperature sent by the air sending means to the storage space and the heat storage space;
Switching means for switching so that air of a predetermined temperature supplied by the air supply path is supplied only to the storage space, or only to the heat storage space, or both the storage space and the heat storage space;
A communication path provided in the partition wall and communicating with the storage space and the heat storage space;
Communication passage opening and closing means for opening and closing the communication passage;
A reflux path communicating the heat storage space and the air delivery means;
A storage device comprising: a return path opening / closing means for opening and closing the return path. The storage device according to claim 1,
Storage space temperature detecting means for detecting the temperature of the storage space;
Thermal storage space temperature detection means for detecting the temperature of the thermal storage space;
And a control means for controlling the switching means and the return path opening / closing means on the basis of the temperatures detected by the two temperature detecting means, respectively. The storage device according to claim 2,
The control means controls the switching means so that air from the air supply path is supplied only to the storage space, and closes the return path opening / closing means, and the storage space temperature detection means. Controlling the switching means so that air is supplied to the air supply path only to the heat storage space or both the storage space and the heat storage space when the temperature of the storage space detected by A storage apparatus for controlling the reflux path opening / closing means to open. The storage device according to claim 2 or 3,
Comprising stop detection means for detecting the operation stop state of the air delivery means,
The storage device according to claim 1, wherein the control means controls the communication path opening / closing means to be opened when an operation stop state of the air delivery means is detected by the stop detection means. In the storage device according to any one of claims 2 to 4,
A door that separates the storage space from the outside of the storage;
Door opening detection means for detecting the door open state,
The storage device according to claim 1, wherein the control means controls the opening and closing means to open when the door opening detection means detects the opening of the door. The storage device according to any one of claims 1 to 5,
The storage device according to claim 1, wherein the air delivery means generates and delivers cold air. In the storage device according to any one of claims 1 to 6,
The said heat storage space is arrange | positioned at least on one surface of the storehouse, The storehouse characterized by the above-mentioned. In the storage device according to any one of claims 1 to 7,
The storage device according to claim 1, wherein the heat storage space has a heat insulating structure in which a heat insulating material is provided on the partition wall. A vehicle comprising the storage device according to any one of claims 1 to 8. A ship equipped with the storage device according to any one of claims 1 to 8.

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