JP2002048451A - Cooling storage compartment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage compartment which can prevent the occurrence of such a trouble that a cooler and a cold storage medium are supercooled and, as a result, the cooler and medium are broken when a compressor is operated for freezing the cold storage medium. SOLUTION: A controller 24 is provided with a timer and a temperature sensor 80 which detects the temperature of the cold storage medium 13 and executes a cold storage medium freezing mode in which the medium 13 is frozen by means of the cooler 34 by operating the compressor 37 at a preset time and a cold storage medium cooling mode in which the inside of a storage chamber 5 is cooled by utilizing the cooling ice melting action of the medium 13 by stopping the compressor 37. In the cold storage medium freezing mode, the controller 24 stops the compressor 37 when the temperature of the medium 13 detected by means of the sensor 80 reaches a first temperature which is not higher than the freezing temperature of the medium 13 and starts the compressor 37 when the temperature of the medium 13 rises and reaches a second temperature which is also not higher than the freezing temperature thereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device provided in a heat insulating box, a cooling device having a refrigerant circuit including a compressor and a cooler, and a cool storage device provided in exchange with the cooler. The present invention relates to a cooling device comprising a blower for circulating and cooling cold air exchanged with a cooling agent and a cooler and a regenerator in a storage room, and a control device for controlling the compressor and the blower.

[0002]

2. Description of the Related Art Conventionally, this type of cooling storage is a cooling storage installed in a restaurant, for example. In stores such as restaurants, there is a demand to reduce noise caused by the operation of the cooling device of the cooling storage during business hours, and a cold storage agent is disposed in the storage of the cooling storage, and the cold storage agent frozen outside business hours. The cold air cooled by the latent heat of fusion is circulated into the storage room by a blower disposed in the refrigerator, and cooled.

[0003]

However, in such a conventional configuration, the compressor of the cooling device is continuously operated during the freezing operation of the regenerator outside the business hours. There has been a problem that the temperature of the regenerator is abnormally lowered, and the cooler and the regenerator are damaged by overcooling.

[0004] Cooling of the storage chamber outside of business hours has been performed by operating a blower for circulation in the refrigerator during the freezing operation of the regenerator, but as described above, the supercooler of the cooler and the regenerator is cooled. When this occurs, the temperature of the cold air circulated in the refrigerator drops abnormally, and there is a problem that the quality of the products in the storage room deteriorates.

[0005] In addition, there is a problem that running the compressor more than necessary increases the power consumption of the cooling storage more than necessary and increases running costs.

Accordingly, the present invention has been made to solve the conventional technical problems, and has been made to prevent breakage of the cooler and the regenerator due to supercooling of the regenerator and the regenerator during freezing operation of the regenerator. It is an object of the present invention to provide a cooling storage that can avoid inconvenience.

[0007]

SUMMARY OF THE INVENTION The cooling storage of the present invention comprises:
A storage room configured in an insulated box, a cooling device in which a refrigerant circuit is configured by a compressor, a cooler, and the like, a regenerator provided in a heat-exchange manner with the cooler, and the regenerator and the regenerator A blower for circulating the exchanged cool air in the storage room to cool the compressor, and a control device for controlling the compressor and the blower, the control device comprising a time limiter and a regenerator for detecting the temperature of the regenerator. Equipped with a temperature sensor, a regenerator freezing mode in which the compressor is operated at a preset time to freeze the regenerator by the cooler, and a regenerator which stops the compressor and cools the storage chamber by the cooling action of the regenerator. While executing the refrigerant cooling mode, in the regenerator freezing mode, the compressor is stopped when the temperature of the regenerator detected by the regenerator temperature sensor reaches a first temperature that is equal to or lower than the freezing temperature of the regenerator. Then rise to freezing temperature Characterized by starting the compressor when it reaches the second temperature is lower.

[0008] According to the present invention, a storage chamber formed in a heat insulating box, a cooling device in which a refrigerant circuit is formed by a compressor, a cooler, and the like, and a regenerator provided in a heat exchange manner with the cooler. ,
In a cooling storage provided with a blower for circulating and cooling the cool air exchanged with the cooler and the regenerator in the storage room and a control device for controlling the compressor and the blower, the control device includes a time limiter and a regenerator. A cold storage agent freezing mode that includes a cold storage agent temperature sensor that detects the temperature of the refrigerant, and operates the compressor at a preset time to freeze the cold storage agent with the cooler
While the compressor is stopped to execute the regenerator cooling mode in which the storage chamber is cooled by the cooling action of the regenerator, in the regenerator freezing mode, the temperature of the regenerator detected by the regenerator temperature sensor changes the temperature of the regenerator. Since the compressor is stopped when the first temperature which is equal to or lower than the freezing temperature is reached, and then the compressor is started when the temperature reaches the second temperature which is equal to or lower than the freezing temperature. Inconveniences such as breakage of the cooler and the regenerator due to supercooling of the cooler and the regenerator can be avoided beforehand.

Further, since the operation of the compressor is stopped when the temperature falls below a certain temperature (first temperature), it is possible to reduce unnecessary power consumption by cooling the regenerator more than necessary.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a cooling storage 1 as an embodiment to which the present invention is applied, FIG. 2 is a perspective view of the cooling storage 1 as an embodiment to which the present invention is also applied, FIG. FIG. 4 shows a perspective view of the cooling storage 1. The cooling storage 1 is, for example, a low-temperature showcase installed in a restaurant or the like, and has a main body composed of a heat insulating box 2 opened at the front. The heat-insulating box 2 includes an outer box 3 made of a steel plate having an opening at the front, an inner box 4 made of a steel plate or a hard synthetic resin having an opening at the front and incorporated in the outer box 3 with a space therebetween, and an outer box. 3 and a heat insulating material 9 made of urethane foam filled between the inner box 4 and the foam.

A storage room 5 is formed in the inner box 4, and a front opening 6 of the storage room 5 is closed by sliding glass doors 7, 8 so as to be openable and closable. In the storage room 5, a shelf 10 for displaying products is installed. Although only one shelf 10 is shown in this embodiment, a plurality of shelves 10 may be provided.

A heat insulating partition plate 11 is provided on the bottom surface of the storage room 5 at a predetermined distance from the bottom surface of the heat insulating box 2. The regenerative chamber 12 is constructed. The cold storage chamber 12 houses a cold storage unit 49 composed of a cool storage agent 13 and a cooler 34, which will be described in detail later. It is assumed that an electric heater 25 is provided on the upper surface of the heat insulating partition plate 11 as shown in FIG.

On both side walls of the inner box 4 of the storage room 5, duct plates 15, 15 are respectively mounted at predetermined intervals from the side walls of the inner box 4. One of the duct plates 15, which is attached to the right side in this embodiment, forms a duct 18 whose lower end communicates with the cold storage chamber 12, and discharges cool air into the storage chamber 4 at the top. Discharge port 16 is formed. A position corresponding to the discharge port 16 of the duct 18 is an air circulation blower 20.
Is provided. The other duct plate 15, which is attached to the left side in this embodiment, has a duct 19 whose lower end communicates with the cold storage chamber 12, and has a cool air in the storage chamber 4 at the top. A suction port 17 for sucking air is formed. A temperature sensor 30 for detecting the temperature of the cool air sucked into the duct 19 is attached above the duct 19, and is connected to the control device 24.

Further, at the lower rear portion of each of the duct plates 15, 15, that is, at the left and right corners behind the bottom surface of the storage room 5,
A plurality of cool air circulation holes 21 and 22 are formed, respectively. The cool air circulation holes 21 and 22 are respectively provided in the cold storage chambers 12.
Has been communicated with. Furthermore, each duct plate 15, 1
Behind 5, illumination lamps 26, 26 for illuminating the inside of the storage room 5 vertically are provided.

On the other hand, below the heat insulating box 2, a machine room 31 is provided.
Are formed. The machine room 31 will be described with reference to FIG. FIG. 5 shows a perspective perspective view of the lower part of the cooling storage 1. The machine room 31 is open at the front, and this opening is closed by a panel 33 having a suction port 32 formed therein so as to be freely opened and closed.

In the machine room 31, in this embodiment, a condenser 35 constituting a cooling device together with the cooler 34 in order from the right.
And a condenser blower 3 for cooling the condenser 35
6 and a compressor 37 are provided. The cooling devices such as the compressor 37, the condenser 35, and the cooler 34 are connected by a refrigerant pipe 42 to form a so-called refrigeration cycle. Here, the cooler 34
A refrigerant pipe 42 for connecting the refrigerant chamber 42 and the condenser 35 installed in the machine room 31 is provided from the left side of the machine room 31 above an evaporator 38 to be described later. An evaporator 38 is provided on the left side of the compressor 37. It is assumed that the control device 24 is also provided in the machine room 31.

On the other hand, below the cooler 34, the cooler 3
A drain pan (not shown) for draining drain water generated from the storage chamber 4 out of the storage chamber 5 is formed, and a drain socket 39 is provided at a lower end of the drain pan. The evaporator 3 is connected via the drain socket 39.
Drain water is drained to 8. The evaporating device 38 includes an evaporating dish 40 and an evaporating plate 41 that absorbs drain water stored in the evaporating dish 40 by capillary action.

Here, a wind direction plate 45 is attached to the bottom wall 2A of the heat insulating box 2 located above the evaporator 38. The wind direction plate 45 will be described with reference to FIGS. FIG. 6 is a perspective view of the wind direction plate 45 of the present embodiment, and FIG.
Shows a partially enlarged perspective view of the wind direction plate 45 of the present embodiment. The wind direction plate 45 is a plate-like member made of, for example, a steel plate material, and has front flanges and rear ends formed with downward flanges 46, which are bent downward at substantially right angles. A lower end of the downward flange 46 has a folded portion 47 bent further inward and upward at a predetermined angle as shown in FIG.
A is formed. Further, the evaporating device 38 of the wind direction plate 45
The end on the side, that is, the left end in the present embodiment, is formed with an inclined portion 48 which is formed to be inclined downward.
In this embodiment, two holes formed on the upper surface of the wind direction plate 45 are mounting holes 5 for mounting to the bottom wall 2A of the heat insulating box 2.
7, 57.

With the above configuration, when the cooling device in the machine room 31 is operated, warm air (waste heat) of the compressor 37 and the condenser 35 is blown toward the evaporator 38 by the condenser blower 36. At this time, the warm air located above the machine room 31 enters from the right end of the wind direction plate 45 attached to the bottom wall 2A of the heat insulating box 2 in this embodiment.
The warm air that has entered the wind direction plate 45 is blown below the wind direction plate 45, that is, on the evaporating plate 41 of the evaporator 38, along the inclined portion 48 formed at the left end of the wind direction plate 45.

Thus, the warm air in the machine room 31 can be efficiently blown to the evaporating plate 41 of the evaporator 38 by the wind direction plate 45, and the evaporating plate 41 improves the evaporating effect of the drain water absorbed by the evaporating plate 41. be able to. Thus, the drain water stored in the evaporating dish 40 can be effectively evaporated.

The wind direction plate 45 is formed with downward flanges 46, 46 at its front end and rear end.
5 and, for example, a space in the machine room 31 such as the refrigerant pipe 42 can be sufficiently secured.
8, the amount of warm air blown to the evaporating plate 41 can be easily secured, and the evaporation of the evaporating dish 40 can be further promoted.

Further, the downward flange 4 of the wind direction plate 45 is provided.
At the lower end of 6, a folded portion 47 </ b> A that is bent further inward and upward at a predetermined angle is formed, so that the device located below the wind direction plate 45 due to, for example, maintenance work in the machine room 31. For example, even when the refrigerant pipe 42 contacts the lower edge of the flange 46 of the wind direction plate 45,
When the folded portion 47A of the wind direction plate 45 is brought into contact, damage to the refrigerant pipe 42 and the like caused by the end of the flange 46 coming into contact can be avoided beforehand. Inconveniences such as leakage of the refrigerant due to damage to the device can be avoided beforehand.

Further, since the folded portion 47A is formed at the end of the flange 46 of the wind direction plate 45, maintenance work in the machine room 31 can be easily performed.

8 to 12 show other embodiments of the wind direction plate 45, respectively. The wind direction plate 45 of another embodiment shown in FIG. 8 has a bent portion 47B formed at the lower end of the downward flange 46 on the opposite side to the above-described embodiment, that is, bent outward at a predetermined angle toward the upper side. ing.

In the wind direction plate 45 of another embodiment shown in FIG. 9, a bent portion 47C which is bent inward at a predetermined curvature is formed at a lower end of a downward flange 46. Further, FIG.
0 has a folded portion 47 which is bent outward at a predetermined curvature at the lower end of the downward flange 46.
D is formed.

Since the lower end of the downward flange 46 of the wind direction plate 45 is formed with the folded portions 47C and 47D which are formed to be curved inward or outward, the flange 4
Even when equipment such as the refrigerant pipe 42 located below the wind direction plate 45 contacts the lower end of 6, the damage to the refrigerant pipe 42 and the like can be further avoided.

Further, in the wind direction plate 45 of another embodiment shown in FIG. 11, the lower end of the downward flange 46 is bent inward at a substantially right angle, and the further end is directed upward. A folded portion 47E bent at a right angle is formed. The wind direction plate 45 of another embodiment shown in FIG. 12 is formed by bending the lower end of the downward flange 46 outward at a substantially right angle.
Further, a folded portion 47F is formed in which such an end is bent upward at a substantially right angle.

As a result, it is possible to avoid damage to the refrigerant pipe 42 and the like due to the end face of the downward flange 46 of the wind direction plate 45, and to make contact with equipment or the like to form a folded back formed at the lower end of the flange 46. The portion 47E or 47F is less likely to be deformed. This ensures that the wind direction plate 4
5 and, for example, a space in the machine room 31 such as the refrigerant pipe 42 can be sufficiently secured.
8, the amount of warm air blown to the evaporating plate 41 can be easily secured, and the evaporation of the evaporating dish 40 can be further promoted.

Next, the regenerator 13 and the cooler 34 provided in the regenerator 12 will be described with reference to FIGS. FIG. 13 is an exploded perspective view of the cool storage unit 49. The cool storage unit 49 includes a plurality of cool storage agents 13 arranged in the cool storage room 12, the cooler 34, and the cool air circulation blower 53. The regenerator 13 is stored in a regenerator box 50 as shown in FIG.

Here, the regenerator box 50 will be described with reference to FIGS. FIG. 14 shows a regenerator box 50.
FIG. 15 is an exploded perspective view of the regenerator box 50, and FIG.
6 is an enlarged exploded perspective view of the upper portion of the cool storage agent box 50, and FIG. 17 is an enlarged exploded perspective view of the lower portion of the cool storage agent box 50. The regenerator box 50 includes a main body 54 composed of a plate member having good thermal conductivity, and a cover 5 fitted to the front surface of the main body 54.
5, the cooler 34 attached to the outer surface of the main body 54,
A press member 56 for holding the cooler 34 on the main body 54 is provided. The cooler 34 is constituted by a cooling pipe arranged in a meandering shape, and a holding member 56 for holding the cooler 34 in the main body 54 extends left and right so as to match the meandering shape of the cooler 34. A plurality of grooves to be formed are formed vertically.

The main body 54 has flanges 58 formed on left and right edges. The flange 58 is bent slightly forward and then extends obliquely inward, and an outward portion 60 extending outward from the tip of the inclined portion 59 in parallel with the main body 54. Is formed from. A plurality of screw holes 61 are formed in the outward portion 60 in a vertical direction.

The lower end of the main body 51 is bent forward at a substantially right angle, then extends to substantially the same position as the front end of the outward portion 60 of the flange 58, and is further bent upward at a substantially right angle. Formed flange 62 is formed. This flange 62
Are formed with a plurality of cool air circulation holes 63 on the lower surface thereof.

The cover 55 is formed with a flange 64 whose left and right edges are bent slightly backward, and the front surface of the cover 55 is aligned with the screw hole 61 formed in the outward portion 60 of the main body 51. A plurality of screw holes 65 for screwing are formed. The flange 64 is provided with a screw hole 68 for fixing the blower-side connection member 51 and the suction-side connection member 52 to be described later by screwing. At the lower end of the cover 55, a flange 66 bent rearward at a substantially right angle is formed. This flange 6
6, a plurality of cool air circulation holes 67 are formed at positions corresponding to the cool air circulation holes 63 formed in the flange 62 of the main body 51.

With the above configuration, the regenerator box 50 is aligned with the screw hole 61 of the main body 54 and the screw hole 65 of the cover 55 after the outward portion 60 of the flange 58 of the main body 54 is aligned with the rear surface of the cover 55. And fixed with screws 69. A cooler 3 composed of a cooling pipe is provided on the back of the main body 54.
4 is attached by the pressing member 56, whereby the cold storage agent box 50 is completed.

At this time, the screw 69 is located outside the inclined portion 59 formed on the flange 58 of the main body 54 of the cold storage container 50 and is screwed. 50, without entering the inside of the cold storage container 5
0 can be fixed.

Therefore, the disadvantage that the regenerator 13 stored in the regenerator box 50 is damaged by the tip of the screw 69 can be avoided. Further, even when the cold storage agent 13 is taken in and out of the cold storage agent box 50, the tip of the screw 69 does not come into contact with the cold storage agent 13, so that the risk of damage to the cold storage agent 13 can be avoided. become able to.

In the present embodiment, five cold storage agent boxes 50 completed as described above are arranged in parallel, and a cooler 34 attached to each is joined. Then, both ends of the cold storage agent box 50 are fixed to the blower side connection member 51 and the suction side connection member 52, respectively. Here, the blower-side connecting member 51 is formed with a flange 71 whose front end is bent at a substantially right angle to the blower 53 side, and an opening 70 opened rearward from a front portion of the blower-side connecting member 51. Is formed. Further, screw holes 76 for fixing the cold storage agent box 50 are formed at the upper edge and the lower edge of the opening 70 of the blower-side connection member 51, respectively.

The suction-side connecting member 52 has a flange 73 formed on the edge thereof at a substantially right angle toward the side, and extends from the front to the rear of the suction-side connecting member 52. An opening 74 is formed. Further, screw holes 77 for fixing the cool storage agent box 50 are formed at the upper edge and the lower edge of the opening 74 of the suction side connection member 52, respectively.

In this case, the temperature sensor 80 for detecting the temperature of the cold storage unit 49 is attached in advance to the cold storage container box 50 located near the center. .

Next, a procedure for assembling the cool storage unit 49 will be described with reference to FIGS. 18 is a cross-sectional plan view of the cold storage unit 49, and FIG.
9 is an enlarged plan view on the right side of the cool storage unit 49, and FIG. 21 is a vertical sectional side view of the cool storage unit 49. First, the regenerator 13 is stored in each regenerator box 50. After that, in this embodiment, five cold storage agent boxes 50 each containing the cold storage agent 13 are arranged in parallel, and a cool storage agent box cover 81 is placed on the upper surface thereof.

At this time, at the center of the cool storage box cover 81, four claws 82 are formed in the present embodiment, which are formed by cutting and raising downward. The claw portions 82 are provided on the coolers 34 attached to the outside of the respective regenerator boxes 50.
And the width of the claw portion 82 is cut and raised to a width slightly larger than the width of the cooler 34.

Thus, by placing the cool storage agent boxes 50 such that the respective coolers 34 are located at the positions of the claws 82 of the cool storage agent box cover 81, the respective cool storage agent boxes 50 The arrangement can be easily determined.

Further, since the claw portion 82 is formed to have a width larger than the width of the cooler 34, it is possible to secure a space between the adjacent regenerator boxes 50. As a result, the amount of cool air passing between the cool storage agent boxes 50 can be ensured.

The right ends of the cool storage agent boxes 50 are fixed by the blower-side connecting member 51, and the left ends are fixed by the suction-side connecting member 52. At this time, each of the cold storage agent boxes 50 and the blower side connection member 51 and the suction side connection member 52 are fixed to each other by screw holes 68 formed in the flange 64 of the cover 55 of the cold storage agent box 50 and the blower side connection. The screw hole 76 formed in the member 51 or the screw hole 77 formed in the suction side connection member 52 is aligned with the screw 7.
8 by screwing.

Here, the screw 78 is located outside the inclined portion 59 formed on the flange 58 of the main body 54 of the cold storage container 50 and is screwed. 50, without entering the inside of the cold storage container 50
Can be fixed.

Therefore, the disadvantage that the regenerator 13 stored in the regenerator box 50 is damaged by the tip of the screw 78 can be avoided. Further, even when the regenerator 13 is taken in and out of the regenerator box 50, the tip of the screw 78 does not come into contact with the regenerator 13, so that the danger of damage to the regenerator 13 can be avoided. become able to.

Further, on the blower side of the blower-side connecting member 51, a blower cover 72 having an opening 75 for mounting a cool air circulation blower 53 is attached. Blower 53
Is attached.

On the other hand, a temperature sensor 30 for detecting the temperature in the duct 19 (the temperature in the storage room 5) and a temperature sensor 80 for detecting the temperature in the cool storage unit 49 are connected to the control device 24. Based on these outputs, the compressor 37, the condenser 36, the air circulation fan 20 and the cool air circulation fan 53 are controlled. Further, a timer as a time limit device is provided in the control device 24. The cooling storage 1 is provided with a control panel (not shown) so that the temperature in the storage room 5 and the time of the operation mode can be set.

The operation control of the cooling storage 1 with the above configuration will be described with reference to FIG. FIG. 22 shows a timing chart of the cooling storage 1. The cooling storage 1 in the present embodiment performs two types of operation control, that is, a cold storage agent freezing mode and a cold storage agent cooling mode, and the cold storage agent freezing mode and the cold storage agent cooling mode are switched by the control panel. Set the time.
For example, when the cooling storage 1 in the present embodiment is installed in a restaurant that is open from evening to midnight, for example, the cool storage agent freeze mode is from 1:00 am to 5:00 pm, and the cool storage agent freeze mode is from 5:00 pm to 1 am Until time is set as the regenerator cooling mode. Accordingly, during the business hours, the cooling operation without operating the cooling device such as the compressor 37 is performed, so that the noise at the installation site can be reduced.

In the cold storage agent freezing mode, as shown in FIG. 22, the compressor 37 and the blower 36 for the condenser are operated to cool the cold storage agent 13 provided with heat exchange with the cooler 34.
At this time, the cool air circulation blower 53 is connected to the duct 1
The operation control is performed based on the output of the temperature sensor 30 that detects the temperature inside the storage chamber 9 (the temperature inside the storage room 5). That is, when the set temperature in the storage room 5 is, for example, + 9 ° C., when the temperature detected by the temperature sensor 30 reaches the upper limit temperature Ta ° C. (in this case, + 11.5 ° C.), the cool air circulation blower 53 is started. I do. Thereby, the temperature in the storage room 5 decreases. When the temperature detected by the temperature sensor 30 reaches the lower limit temperature Tb ° C. (in this case, + 6.5 ° C.) due to the temperature drop, the cool air circulation blower 53 is stopped. Thereby, the temperature in the storage room 5 is maintained at the set temperature.

At this time, since the air circulation blower 20 is started continuously, the flow of the cool air in the storage room 5 is as shown in FIG.
As shown in FIG. 5, when the cool air circulation blower 53 is activated, the cool air that has passed between the cool storage units 49 is accelerated by the cool air circulation blower 53 and enters the duct 18 from the cool storage chamber 12. After being further accelerated by the air circulation blower 20 installed above the duct 18, the air is discharged into the storage room 5 through the discharge port 16. The cool air that has entered the storage room 5 then enters the duct 19 from the suction port 17, descends the duct 19, and returns to the cold storage room 12.

When the cool air circulating blower 53 is stopped, the air in the duct 18 is supplied to the air circulating blower 2.
After being discharged into the storage room 5 from the discharge port 16 by 0,
The air enters the air inlet 16 or the cool air circulation holes 21 and 22 formed at the rear of the bottom surface of the storage room 5, and again enters the duct 19.

Thus, it is possible to avoid temperature unevenness caused by a no-air condition in which the air in the storage room 5 is not circulated. In addition, since the cool air circulation blower 53 is stopped and air is circulated by the air circulation blower 20, air circulation can be performed without drawing cool air from the cooler 34 and the regenerator 13 into the storage room 5. Become like

Therefore, excessive cooling in the storage room 5 in the cold storage agent freezing mode can be prevented beforehand, and temperature unevenness caused by the absence of wind in the storage room 5 can be eliminated. Become.

In this embodiment, the air circulation blower 20 is used.
Is a continuous operation, but starts the air circulation fan 20 when the cool air circulation fan 53 stops, and stops the air circulation fan 20 when the cool air circulation fan 53 starts. Operation control for starting or stopping in a cycle opposite to that of 53 may be performed. Even in such a case, the same effect as in the above embodiment can be obtained.

On the other hand, in the cold storage agent freezing mode, the freezing of the cold storage agent 13 proceeds, and the temperature detected by the temperature sensor 80 installed in the cold storage unit 49 is equal to or less than the first temperature at which the freezing agent 13 is frozen. For example, when the temperature reaches −20 ° C., the control device 24 stops the operation of the compressor 37. When the operation of the compressor 37 of the cooling device is stopped, when the temperature of the regenerator 13 gradually increases and reaches a second temperature that is equal to or lower than the freezing temperature of the regenerator 13, for example, −13 ° C., the control device 24 The operation of the compressor 37 is restarted. Thus, when the temperature of the regenerator 13 reaches the first temperature again, the operation of the compressor 37 is similarly stopped. The temperature control is repeated until the cold storage agent freezing mode ends and the cold storage agent cooling mode is set.

As a result, inconveniences such as breakage of the cooler 34 and the regenerator 13 due to supercooling of the cooler 34 and the regenerator 13 in the regenerator freezing mode can be avoided. Further, when the temperature falls below a certain temperature (first temperature), the operation of the compressor 37 is stopped, so that it is possible to reduce unnecessary power consumption by cooling the regenerator 13 more than necessary.

Next, the regenerator cooling mode after the refrigerating agent freezing mode is completed by the control device 24 will be described. In this cool storage agent cooling mode, as shown in FIG. 22, the operation of the compressor 37 and the condenser blower 36 is stopped, and the inside of the storage room 5 is cooled by the latent heat of melting of the cool storage agent 13 frozen in the cool storage agent freezing mode. At this time, the operation of the cool air circulation blower 53 is controlled based on the output of the temperature sensor 30 that detects the temperature in the duct 19 (the temperature in the storage room 5). That is, when the set temperature in the storage room 5 is, for example, + 9 ° C., when the temperature detected by the temperature sensor 30 reaches the upper limit temperature Ta ° C. (in this case, + 11.5 ° C.), the cool air circulation blower 53 is started. I do. Thereby, the temperature in the storage room 5 decreases. Due to this temperature drop, the temperature detected by the temperature sensor 30 becomes the lower limit temperature Tb ° C.
When the temperature reaches 6.5 ° C.), the cool air circulation blower 53 is stopped. Thereby, the temperature in the storage room 5 is maintained at the set temperature.

At this time, since the air circulation blower 20 is continuously started, the flow of the cool air in the storage room 5 is as shown in FIG.
As shown in FIG. 5, when the cool air circulation blower 53 is activated, the cool air passing between the cool storage units 49 is accelerated by the cool air circulation blower 53 and enters the duct 18 from the cool storage chamber 12 and enters the duct 18. After being further accelerated by an air circulation blower 20 installed above 18, the air is discharged into the storage room 5 through the discharge port 16. The cool air that has entered the storage room 5 then enters the duct 19 through the suction port 17, descends the duct 19, and returns to the cold storage room 12.

When the cool air circulating blower 53 is stopped, the air in the duct 18 is removed from the air circulating blower 2.
After being discharged into the storage room 5 from the discharge port 16 by 0,
The air enters the air inlet 16 or the cool air circulation holes 21 and 22 formed at the rear of the bottom surface of the storage room 5, and again enters the duct 19.

As a result, it is possible to avoid temperature unevenness caused by a no-air condition in which the air in the storage room 5 is not circulated. In addition, since the cool air circulation blower 53 is stopped and air is circulated by the air circulation blower 20, air circulation can be performed without drawing cool air from the cooler 34 and the regenerator 13 into the storage room 5. Become like

Therefore, excessive cooling in the storage room 5 in the regenerator cooling mode can be prevented beforehand, and the products displayed in the storage room 5 are excessively cooled,
Deterioration of product quality can be avoided beforehand.

Even when the cool air circulation blower 53 is not operated, the air circulation blower 20 is operated, so that the storage chamber 5 is kept in a windless state, thereby avoiding the occurrence of uneven temperature. Will be able to Thereby, the inconvenience that the temperature varies depending on the position where the commodities displayed in the storage room 5 are displayed can be avoided.

In both the cold storage agent freezing mode and the cold storage agent cooling mode, the blower 5
3 is stopped, the temperature detected by the temperature sensor 30 that detects the temperature in the storage room 5 is lower than the lower limit temperature Tb because, for example, the outside air temperature is abnormally lowered.
When the temperature falls below ℃, the electric heater 25 installed in the storage room 5 is energized. Thereby, the temperature of the product displayed in the storage room 5 can be maintained at the set temperature without lowering the temperature in the storage room 5 below the lower limit temperature Tb ° C. Further, since it is possible to prevent the temperature in the storage room 5 from abnormally lowering, it is possible to prevent deterioration of the quality of the product caused by freezing of the product.

When the timer of the control device 24 reaches the time at which the regenerator cooling mode is ended, the compressor 37 restarts the operation and performs the hot gas defrost operation by flowing the hot gas to the cooler 34. Do. Thereby, the cooler 34 and the regenerator 13 are completely melted. After that, the control device 24 enters the cold storage agent freezing mode and starts the freezing operation of the cold storage agent 13. Thereby, the cold storage agent 13 is frozen in preparation for business on the next day, and the inside of the storage room 5 can be cooled.

[0066]

As described above in detail, according to the present invention, a storage chamber formed in a heat insulating box, a cooling device in which a refrigerant circuit is formed by a compressor, a cooler, and the like; In the cooling storage provided with a regenerative agent provided in the air conditioner, a blower for circulating and cooling the cool air exchanged with the cooler and the regenerator in the storage room, and a control device for controlling the compressor and the blower. The apparatus includes a time limit means and a regenerator temperature sensor for detecting the temperature of the regenerator, a regenerator freezing mode in which the compressor is operated at a preset time to freeze the regenerator by the cooler, and the compressor is stopped. In addition to executing the cold storage agent cooling mode for cooling the storage chamber by the cooling action of the cold storage agent, and in the cold storage agent freezing mode, the temperature of the cold storage agent detected by the cold storage agent temperature sensor is lower than the freezing temperature of the cold storage agent. A certain first temperature The compressor is stopped when the temperature reaches the temperature, and then starts when the temperature rises and reaches the second temperature which is equal to or lower than the freezing temperature. Therefore, cooling by supercooling the cooler and the regenerator in the regenerator freezing mode is performed. Inconveniences such as breakage of the vessel and the regenerator can be avoided beforehand.

Further, since the operation of the compressor is stopped when the temperature becomes equal to or lower than the predetermined temperature (first temperature), it is possible to reduce unnecessary power consumption by cooling the regenerator more than necessary.

[Brief description of the drawings]

FIG. 1 is a front view of a cooling storage as an embodiment to which the present invention is applied.

FIG. 2 is a perspective view of a cooling storage as an embodiment to which the present invention is applied.

FIG. 3 is a vertical sectional side view of a cooling storage.

FIG. 4 is a perspective view of the cooling storage;

FIG. 5 is a perspective view of the lower part of the cooling storage;

FIG. 6 is a perspective view of a wind direction plate of the present embodiment.

FIG. 7 is a partially enlarged perspective view of a wind direction plate of the present embodiment.

FIG. 8 is a partially enlarged perspective view of a wind direction plate of another embodiment.

FIG. 9 is a partially enlarged perspective view of a wind direction plate of another embodiment.

FIG. 10 is a partially enlarged perspective view of a wind direction plate of another embodiment.

FIG. 11 is a partially enlarged perspective view of a wind direction plate of another embodiment.

FIG. 12 is a partially enlarged perspective view of a wind direction plate of another embodiment.

FIG. 13 is an exploded perspective view of the cold storage unit.

FIG. 14 is a perspective view of a cool storage box.

FIG. 15 is an exploded perspective view of a cool storage box.

FIG. 16 is an enlarged exploded perspective view of the upper portion of the cool storage box.

FIG. 17 is an enlarged exploded perspective view of the lower part of the cool storage box.

FIG. 18 is a cross-sectional plan view of the cold storage unit.

FIG. 19 is an enlarged plan view of the left side of the cool storage unit.

FIG. 20 is an enlarged plan view of the right side of the cool storage unit.

FIG. 21 is a vertical sectional side view of the cool storage unit.

FIG. 22 is a timing chart of the cooling storage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling storage 2 Heat insulation box 5 Storage room 12 Cold storage room 13 Cool storage agent 15 Duct plate 16 Discharge port 17 Suction port 18, 19 Duct 20 Air circulation blower 21, 22 Cold air circulation hole 24 Control device 30 Temperature sensor 31 Machine room 34 Cooler 35 Condenser 36 Blower for condenser 37 Compressor 38 Evaporator 49 Cool storage unit 50 Cool storage agent box 53 Cooler circulation blower 80 Temperature sensor

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Junya Ito 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. (Reference) 3L044 AA01 AA02 BA01 CA11 DC03 DD07 FA03 FA04 HA01 JA01 KA01 KA04 3L045 AA02 AA04 AA07 BA10 CA02 DA02 EA01 KA14 LA05 MA01 MA11 NA16 PA01 PA04

Claims (1)

[Claims] A storage device configured in a heat insulating box, a cooling device configured with a refrigerant circuit including a compressor, a cooler, and the like;
A regenerator provided in an exothermic manner with the cooler, a blower that circulates and cools the cool air exchanged with the cooler and the regenerator in the storage chamber, and a control device that controls these compressors and blowers. A cooling storage, comprising: a time limit means and a regenerator temperature sensor for detecting a temperature of the regenerator, operating the compressor at a preset time to operate the compressor. A cold storage agent freezing mode for freezing the cold storage agent, and a cold storage agent cooling mode for stopping the compressor and cooling the storage chamber by a cooling action of the cold storage agent, and the cold storage agent in the cold storage agent freezing mode. When the temperature of the regenerator detected by the refrigerating agent temperature reaches a first temperature that is equal to or lower than the freezing temperature of the regenerator, the compressor is stopped, and then the second temperature is increased and equal to or lower than the freezing temperature. Warmth Cooling storage, which comprises activating the compressor when it reaches a.