JP2003343973A - Cooling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling apparatus provided with a cooling device constituted by refrigerant piping constituting a plurality of refrigerant passages for making refrigerant flow by dividing its flow in the cooling device and capable of sensing accurate completion of defrosting even when conditions of refrigerant in each refrigerant piping differ. <P>SOLUTION: In this cooling apparatus R provided with the cooling device 14 constituted by the refrigerant piping 45, the refrigerant piping 45 constitutes two refrigerant passages 44A, 44B for making refrigerant flow by dividing its flow in the cooling device 14, and a defrosting completion sensor 50 is provided in a heat-alternating manner in all the refrigerant piping 45 in a section before the refrigerant piping 45 constituting each refrigerant passage 44A, 44B comes out of the cooling device 14 and joins. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device provided with a cooler constituted by refrigerant pipes which form a plurality of refrigerant passages for dividing the refrigerant in the cooler.

[0002]

2. Description of the Related Art Conventionally, a cooling device provided in a cooling storage or the like constitutes a refrigerant circuit by a compressor, a condenser, an expansion valve as a pressure reducing device, a cooler and the like. this house,
The cooler has a large difference in refrigerant temperature on the inflow side and the outflow side of the refrigerant pipes that form the cooler.
In order to make the temperature difference between the refrigerant pipes as small as possible, the refrigerant that flows into the cooler is diverted to form a plurality of refrigerant passages.

In such a case, the cooling device is operated,
When frost forms on the refrigerant pipes forming the cooler, defrosting operation is performed to remove the frost formed on the refrigerant pipes in order to improve the cooling efficiency of the cooler. The end of this defrosting operation is usually
It is determined by the temperature detected by the defrosting completion sensor provided after the plurality of refrigerant passages forming the cooler merge.

[0004]

However, when the defrosting condition in each refrigerant passage is biased, the gas refrigerant flows out from the refrigerant passage in the portion where the defrosting has progressed. On the other hand, since the refrigerant is condensed in the refrigerant passage of the refrigerant portion where the defrosting is delayed, the low temperature liquid refrigerant flows out. Therefore, when the defrosting completion detection sensor detects the refrigerant temperature after they join, the temperature of the low-temperature liquid refrigerant increases due to being dragged by the temperature of the gas refrigerant, and there is a portion where defrosting is delayed. There is a problem that it is difficult to discover. As a result, there is a problem that the defrosting operation ends even though the defrosting has not completely ended, and frost residue occurs in the refrigerant passage of the cooler.

Therefore, the present invention has been made in order to solve the conventional technical problems, and provides a cooler constituted by a plurality of refrigerant passages for dividing the refrigerant in the cooler. An object of the present invention is to provide a cooling device provided with the cooling device that can realize accurate defrosting completion detection even when the state of the refrigerant in each refrigerant pipe is different.

[0006]

A cooling device of the present invention is provided with a cooler composed of a refrigerant pipe, and the refrigerant pipe has a plurality of refrigerant passages for dividing the refrigerant into the cooler. It is characterized in that, after the refrigerant pipes constituting the respective refrigerant passages have come out of the cooler, before the merging, all the refrigerant pipes are provided with defrosting completion detection sensors in a heat exchange manner. .

According to the present invention, in the cooling device provided with the cooler constituted by the refrigerant pipe, the refrigerant pipe constitutes a plurality of refrigerant passages for diverting the refrigerant into the cooler, and each refrigerant passage is After the constituent refrigerant pipes came out of the cooler, before the confluence, all the refrigerant pipes were provided with defrosting completion detection sensors in a heat exchange manner, so the state of the refrigerant in each refrigerant pipe was different. Even in such a case, it is possible to realize accurate defrosting completion detection that also reflects the state of the refrigerant in the refrigerant pipe in which defrosting has not progressed.

Further, the defrosting completion detecting sensor is provided in the refrigerant pipe after coming out of the cooler, so that the mounting work can be facilitated.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, a cooling device having heat conductivity which holds a defrosting completion detecting sensor is attached to all refrigerant pipes in a heat exchange manner. It is characterized in that the defrosting completion detection sensor can be attached to the holder through an air passage port located on a side opposite to a blower for ventilating the cooler.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, a heat-conducting holder for holding the defrosting completion detecting sensor is attached to all the refrigerant pipes so as to exchange heat with each other, and is cooled. Since the defrosting end detection sensor can be attached to the holder from the air passage port located on the side opposite to the blower that ventilates the device, the work for attaching the defrosting end detection sensor can be further facilitated. Become.

According to a third aspect of the present invention, in addition to the second aspect of the invention, the cooling device further comprises a dew tray for receiving the defrosting water dropped from the cooler, and the holder is attached above the dew tray in an inclined manner. Is characterized by.

According to the invention of claim 3, in addition to the invention of claim 2, since the dew tray for receiving the defrosting water dropped from the cooler is provided, and the holder is attached above the dew tray in an inclined manner. The defrosting water can be smoothly discharged from the holder and can be received by the dew tray.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a front view of a cooling storage 1 such as a prefabricated refrigerator according to an embodiment of the present invention, FIG. 2 is a perspective view of a cooling device R installed in the cooling storage 1, and FIG. 3 is a plan view of the cooling device R. . The cooling storage 1 is composed of a heat insulating box 2, and a storage chamber 3 is formed in the heat insulating box 2. The heat insulating box 2 is formed in a box shape by combining a heat insulating panel 4 having a convex portion or a concave portion at a connecting portion with an adjacent panel.

Further, on the front wall of the heat insulating box body 2, an article inlet / outlet for taking in and out articles such as stored food and one side of the article inlet / outlet are rotatably supported to be openably / closably closed, and a storage chamber 3 is provided. A heat insulating door 5 for sealing is provided.

The top wall (ceiling surface) 2A of the heat insulating box 2
A rectangular opening 6 is formed in the rear portion, and a unit base 7, which will be described in detail later, is attached by closing the opening 6 from above. On this unit base 7, as shown in FIGS. 1 to 3, a compressor 8, a condenser 9 and a blower 10 for a condenser, which constitute a refrigerant circuit of a cooling device R, are provided.
0 (two in this embodiment) are installed, and the electrical equipment box 1
A cooling box 12 constituted by 1 and a heat insulating member is installed.

The unit base 7 includes a cooling box 1
An opening 16 larger than the opening 6 formed in the ceiling wall 2A of the cooling storage 1 is formed at a position corresponding to the position where 2 is installed. Reference numeral 13 in the drawing denotes a handle fixed to the unit base 7.

A cooler 14 (details of which will be described later) which constitutes a cooling device R is provided in the upper rear part inside the cooling box 12, and a cooler for discharging cool air downward is provided in front of the cooler 14. A blower 15 is provided. At the lower end of the cooling box 12, there is further formed a notch 12A (only shown in FIGS. 5 and 6 later) for attaching to the edge of the opening 16 of the unit base 7, whereby the cooling box 1 is formed.
2 has a shape that can be fitted almost exactly into the opening edge 16A of the unit base 7. Then, when the unit base 7 is placed so as to close the opening 6 formed in the ceiling wall 2A, the lower surface opening of the cooling box 12 communicates with the inside of the storage chamber 3.

The unit base 7 will now be described with reference to FIG.
Will be described. FIG. 4 is a perspective view of the unit base 7. The unit base 7 is made of, for example, a rectangular steel plate, and in the present embodiment, the condenser 9 is used.
Grooves 35 are bent and formed at three sides except the left end where the is installed at a predetermined distance from the outer edge of the unit base 7. That is, the peripheral portion of the unit base 7 where the groove 35 is formed is, as shown in FIG. 5, a holding portion 36 in which the outer edge portion is bent toward the inside of the unit base 7 and has a substantially U-shaped cross section.
Is formed, and a groove forming portion 37 having a substantially U-shaped cross section is formed by bending so as to form a groove 35 that opens continuously upward with the upper side of the holding portion 36.

The groove 35 formed on each of these sides forms a continuous groove. Inside the groove 35, a pipe (hot pipe) 38 through which the high-temperature refrigerant in the refrigerant circuit of the cooling device R flows is arranged corresponding to the position where the cooling box 12 is provided. A heat insulating material 39 is embedded in the groove 35 to prevent the hot pipe 38 from rising by pressing the hot pipe 38 against the inner wall of the groove 35 (the groove forming portion 37) from above.

With the above configuration, the unit base 7 is
For example, since the groove 35 is bent and formed at a predetermined distance from the outer edge, the strength of the unit base 7 can be improved and the unit base 7 itself can be reduced in weight.

The groove 3 formed in the unit base 7
5 is also formed corresponding to the outer edge portion to which the cooling box 12 is attached, and as described above, since the hot pipe 38 through which the high-temperature refrigerant flows is arranged in the groove 35, the cooling box 12 is particularly It becomes possible to prevent dew condensation on the lower end portion of the cooling box 12 that is easily cooled by the cool air inside.

Furthermore, since the hot pipe 38 is attached by being pressed against the inner wall of the groove 35 by the heat insulating material 39, the heat of the hot pipe 38 is applied to the unit base 7.
Therefore, heat can be easily conducted, and the outer surface of the unit base 7 can be heated. This also makes it possible to suppress dew condensation that occurs on the outer surface of the unit base 7.

Further, since the groove 35 is formed inside the outer edge of the unit base 7, a portion inside the outer edge of the unit base 7 having a lower temperature can be heated by the hot pipe 38, and the temperature can be increased efficiently. It becomes possible to prevent dew condensation.

Furthermore, in the dew condensation portion of the cooling device R provided on the unit base 7, for example, in the refrigerant circuit of the cooling device R, the cooler 14 and the compressor 8 in the cooling box 12 are provided.
Since the groove 35 is formed at a position that can receive the condensed water generated from the suction pipe 40 connecting between the suction pipe 40 and the accumulator 41 provided in the suction pipe 40, it is possible to prevent the condensed water from leaking. You will be able to.

In this embodiment, the groove 35 is formed on three sides of the unit base 7 except the left side end where the condenser 9 is installed. However, in addition to this, as shown in FIG. The groove 35 may be formed on the side of the left side where the condenser 9 of No. 7 is installed, that is, on all four sides. In this case, since the groove 35 is formed to extend to the lower side of the condenser 9, the condensed water received in the groove 35 can be evaporated by the waste heat of the condenser 9. .

Further, in the present embodiment, the unit base 7
Is formed in a rectangular shape, but other shapes may be used.

Next, the internal structure of the cool air duct panel 21 and the cooling box 12 will be described with reference to FIGS. 8 is a left side view of an upper vertical section of the cooling storage cabinet 1, FIG. 9 is a perspective view of the cooler 14, FIG. 10 is a perspective view of the unit base 7 and the cool air duct panel 21, and FIG. 11 is a bottom view of the cool air duct panel 21. 12 is a vertical right side view of the upper part of the cooling storage cabinet 1, FIG. 13 is a view for explaining the open / close state of the cool air duct panel 21, FIG. 14 is a perspective view when the cool air duct panel 21 is open, and FIG. A partially enlarged view is shown.

A plurality of columns 43 for fixing a fan case 42 for mounting the cooler 14 and the blower 15 for the cooler are mounted along the inner wall of the cooling box 12 inside the cooling box 12. . Then, as described above, the cooler 14 is suspended above the rear inside the cooling box 12. Below the cooler 14, the cooler 14
A dew tray 51 that receives the defrosting water that is dripped from is attached.

The cooler 14 is, as shown in FIG.
In this embodiment in which the refrigerant is diverted, a refrigerant pipe 45 that forms two refrigerant passages 44A and 44B, and a plurality of plate fins 49 that are inserted through the refrigerant pipe 45 and improve the heat exchange efficiency of the refrigerant pipe 45. It consists of In FIG. 9, reference numeral 48 is a fixing plate for fixing the refrigerant pipe 45 and the plate fin 49.

The refrigerant pipe 45 is connected to the respective refrigerant passages 44A, 4A in the cooler 14 from the refrigerant pipe 45A flowing into the cooler 14.
4B, the refrigerant is branched, and the refrigerant flows through the inside of the cooler 14 respectively, and then, the refrigerant flows into the refrigerant passages 44A and 44B. This confluence part 4
6 is connected to the suction pipe 40 that flows out from the cooler 14 to the compressor 8.

Here, in the refrigerant pipe 45, the refrigerant passages 44A and 44B are arranged close to each other at a position after coming out of the cooler 14 and before reaching the merging portion 46. Then, a holder 47 constituted by a thermo pipe having a high thermal conductivity in a heat exchange manner with a refrigerant pipe forming each of the refrigerant passages 44A and 44B is attached to the adjacent portion. A defrosting completion detection sensor 50 connected to a control device (not shown) that controls the cooling device R is held in the holder 47 in a heat-exchangeable and detachable manner with the holder 47.

With the above configuration, when the control device of the cooling device R reaches a predetermined set time, for example, the refrigerant flow path of the refrigerant circuit is switched and the defrosting operation of the cooler 14 is executed. At this time, all the refrigerant pipes 45, that is, in the present embodiment, the refrigerant pipe 45 that constitutes the refrigerant passage 44A and the refrigerant pipe 45 that constitutes the refrigerant passage 44B are provided with the defrosting completion detection sensor 50 in a heat exchange manner. Therefore, the defrosting condition in the refrigerant pipe 45 forming one of the refrigerant passages 44A or 44B progresses, the state of the refrigerant flows out as a gas refrigerant, and the refrigerant pipe 45 forming the other refrigerant passage 44B or 44A.
Even if the low-temperature liquid refrigerant flows out in a state where the defrosting condition in the inside is delayed and the refrigerant is condensed, the defrosting completion detection sensor 50 indicates the temperature of the low-temperature liquid refrigerant in which the defrosting condition is delayed. You will be able to reflect well.

As a result, the one refrigerant passage 44A or 4
Even if the refrigerant in the refrigerant pipe 45 forming 4B is in a gas state, it is possible to accurately detect the low temperature refrigerant state in the refrigerant pipe 45 forming the other refrigerant passage 44B or 44A, and defrost recovery. Therefore, the generation of residual frost on the cooler 14 can be eliminated by delaying the above.

Furthermore, since the holder 47 for holding the defrosting completion detecting sensor 50 is attached so as to be inclined above the dew receiving tray 51, a part of the defrosting water dropped from the cooler 14 is removed. The dew tray 51 can smoothly discharge the ink from the holder 47 and receive it.

Although the cooler 14 is provided with the plate fins 49 in this embodiment, it may be provided with spine fins other than the plate fins 49.

On the other hand, in the dew tray 51, the cooling box 12 extends from the end opposite to the side where the cooler blower 15 is attached to the height of the lower surface of the ceiling wall 2A of the heat insulating box 2.
A partition plate 27 is erected to partition the inside into a cool air discharge side and a cool air suction side.

On the other hand, the cold air duct panel 2 described later in detail
1 is attached from the storage room 3 side at the installation location of the cooling storage 1. At this time, in the lower part of the support column 43 attached to the cooling box 12 for suspending the cooler 14, a duct suspension fitting 5 for reinforcing between the support columns 43 is provided.
For example, 3 is attached across the left and right. Then, the hooks 52 for attaching the cool air duct panel 21 are attached to the duct suspension fittings 53 at the four corners of the cooling box 12 (in this embodiment) on the left, right, front, and rear sides in correspondence with the lower portions of the columns 43.

As shown in FIG. 14, the hook 52 is formed so as to descend from the cooling box 12 side to the ceiling wall 2A of the heat insulating box 2, and the lower end of the hook 52 has a substantially right angle toward the side. A bottom portion 52A that is bent to form is formed. The bottom portion 52A has a cold air duct panel 21 which will be described in detail later.
A screw hole 56 is formed so as to match the screw insertion hole 54 of FIG.

Now, the cold air duct panel 21 will be described. The cold air duct panel 21 is attached from the storage chamber 3 side to the opening 6 formed in the top wall 2A of the heat insulating box 2 on the storage chamber 3 side. The cold air duct panel 21 has an opening 6 whose outer dimensions are formed on the ceiling wall 2A.
It has a rectangular shape that is one size larger than
The upper surface is opened upward so as to communicate with the inside of the cooling box 12.

The cool air discharge ports 22 and 22 are formed on the two sides of the cold air duct panel 21 which form the outer edges of the side, and the cool air is also formed on the one side of the front outer edge. A discharge port 23 is formed. Also,
A cold air suction port 24 is formed on one side forming the rear outer edge portion. Further, the cold air duct panel 21 has a lower surface cool air suction port 25 formed at the rear portion of the lower surface.

Further, on the inner wall of the lower surface of the cool air duct panel 21, the cool air discharge side and the cool air suction side in the cool air duct panel 21 are brought into contact with the partition plate 27 which is vertically installed from the cooling box 12 side. A partition wall 28 for partitioning is formed. As a result, the cool air discharge ports 22, 22 and 23 communicate with the cool air discharge side in the cooling box 12 partitioned by the partition plate 27, and the cold air suction ports 24, 25 are used in the cool air suction side in the cooling box 12. Is formed in communication with.

The hook 5 is formed on the upper surface of the cold air duct panel 21 so as to descend from the cooling box 12 side.
Corresponding to the position where 2 is attached, a locking tool 60 that can be engaged with the hook 52 is attached. The locking tool 60 is formed of a plate-shaped member having a substantially U-shaped cross section, and both ends of the locking tool 60 form a flange bent outward at a substantially right angle. Then, the locking member 60 is attached to the inner wall of the cool air duct panel by the flange so as to project upward.

Further, between both flanges to which the locking tool 60 is attached, a screw insertion hole 54 for matching with the screw hole 56 formed in the bottom surface portion 52A of the hook 52 and allowing the screw 55 to be screwed. Are formed.

Here, the locking tool 60 has a screw insertion hole 54.
Since it is fixed to the cold air duct panel 21 while straddling it, the locking tool 60 can also serve as reinforcement around the screw insertion hole 54 of the cold air duct panel 21.

With the above structure, the cool air duct panel 21
When attaching to the opening 6 of the top wall 2A of the heat insulating box 2,
First, in the present embodiment, which is located on the cold air suction side of the cooling box 12, the hooks 60, 60 of the cold air duct panel 21 are engaged with the front and rear hooks 52 located on the right side. After that, with the hooks 52, 52 directed to the fasteners 60, 60, the cold air duct panel 21 is centered on the engaging portion as it is.
Rotate upwards.

The cool air duct panel 21 is used as the ceiling wall 2A.
In the state where the cold air duct panel 21 is in contact with, the screw hole 56 formed on the bottom surface portion 52A of the hook 52 is aligned with the screw insertion hole 54 of the cold air duct panel 21 from below the cold air duct panel 21, and the screw 55 is screwed. At this time, the screw hole 56 of the hook 52 on the side opposite to the hook 52 side used for the engagement is also aligned with the screw insertion hole 54 formed in the cold air duct panel 21, and screwed by the screw 55.

As a result, as described above, with the hook 52 and the locking tool 60 locked, the cooling box 12 side and the cold air duct panel 21 can be simply rotated around the engaging position.
The positional relationship with the side can be determined with certainty, and the mounting workability can be improved. Further, with such a mounting structure, the cold air duct panel can be firmly attached as compared with the case where the conventional cold air duct panel is fixed to the inner box of the heat insulating box.

The hook 5 descended from the cooling box 12 side
2 and a locking tool 60 attached to the cold air duct panel 21
The cold air duct panel 21 easily by engaging the
Can be mounted, and the workability of mounting can be improved.

The cold air duct panel 21 may be provided with an electric heater (not shown) in order to prevent dew condensation. In this case, the electric power is supplied to the electric heater via the coupler 61 as shown in FIG.
Do from the side. At this time, the ground wire 62 of the electric heater attached to the cold air duct panel 21 side is attached to the duct suspending metal fitting 53 of the hook 52 attached to the cooling box 12 side or the column 43 with a screw 63.

Thus, when performing maintenance work inside the cool air duct panel 21 or inside the cooling box 12, the screw 55 screwed to the cool air duct panel 21 is removed and the rear side of the cool air duct panel 21 located on the suction side is removed. With the end as the center, the front side of the cool air duct panel 21 located on the discharge side is opened downward. Thereby, the inside of the cool air duct panel 21 and the cooling box 12 is opened, and the hook 52 is locked to the locking tool 60, so that the internal maintenance work can be easily performed.

Since the ground wire 62 of the electric heater is attached to the cooling box 12 side of the cold air duct panel 21 as described above, the hook 52 and the locking tool 60 are disengaged. Even in such a case, the ground wire 62 can prevent the cold air duct panel 21 from falling. Thereby, the safety can be improved.

Further, as described above, the refrigerant pipe 4 of the cooler 14
Holder 4 of defrosting completion detection sensor 50 attached to 5
7 is provided in the refrigerant pipe 45 after exiting from the cooler 14, and is attached to the cool air suction side located on the opposite side to the cooler blower 15 that ventilates the cooler 14. The defrosting completion detection sensor 50 can be easily attached without putting a hand on the blower 15 side from the opening 6 (air passage opening as the suction side opening) of the top wall 2A.

In this embodiment, the blower 15 for the cooler is used.
Is provided on the discharge side, the holder 47 is provided on the cool air suction side. However, when the cooler blower 15 is configured on the suction side, the holder 47 discharges the cool air. Shall be provided on the side.

With the above construction, when the cooling device R is operated, the cool air in the storage chamber 3 is cooled by the lower surface cool air suction port 25 formed at the lower surface of the cool air duct panel 21 and the cool air suction port formed at the rear end thereof. From 24, it is sucked into the cool air duct panel 21. The cool air sucked into the cool air duct panel 21 rises along the partition wall 28 and the partition plate 27, and heat is exchanged in the cooler 14.

The cool air cooled by the cooler 14 is discharged to the discharge side in the cooling box 12 by the blower 15, and the partition plate 2
7 and the partition wall 28, and the cold air duct panel 2
Cold air is discharged into the storage chamber 3 through the cool air discharge ports 22 and 22 formed at both side ends of the No. 1 and the cool air discharge ports 23 formed at the front end.

As a result, the cool air that has exchanged heat with the cooler 14 is discharged from the cool air discharge ports 22, 22 and 23 along the top wall 2A of the heat insulating box 2, so that the cool air can be discharged in multiple directions. The temperature inside the storage chamber 3 can be made uniform.

Further, since the partition plate 27 mounted in the cooling box 12 is provided on the cold air suction side of the dew tray 51, the partition plate 27 is placed in the cold air duct panel 21 and the cooling box from the lower surface cool air suction port 25 and the cool air suction port 24. It becomes possible to avoid the contact of the high-humidity air sucked into 12 with the high-humidity air to the low-temperature dew tray 51.

As a result, it is possible to prevent the formation of frost or dew condensation on the surface of the dew tray 51, and it is possible to eliminate the contamination due to frost or dew condensation water.

[0059]

As described in detail above, according to the present invention, in a cooling device having a cooler constituted by a refrigerant pipe,
The refrigerant pipe constitutes a plurality of refrigerant passages for dividing the refrigerant in the cooler, and after the refrigerant pipes constituting the respective refrigerant passages have come out of the cooler, at a position before they are joined to all the refrigerant pipes. Since the defrosting completion detection sensor is provided in a heat exchange manner, even when the state of the refrigerant in each refrigerant pipe is different, the state of the refrigerant in the refrigerant pipe in which defrosting has not progressed is also reflected. It becomes possible to realize accurate defrosting completion detection.

By providing the defrosting completion detecting sensor in the refrigerant pipe after coming out of the cooler, the mounting work can be facilitated.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, a heat-conducting holder for holding the defrosting completion detecting sensor is attached to all the refrigerant pipes so as to exchange heat with each other, and is cooled. Since the defrosting end detection sensor can be attached to the holder from the air passage port located on the side opposite to the blower that ventilates the device, the work for attaching the defrosting end detection sensor can be further facilitated. Become.

According to the invention of claim 3, in addition to the invention of claim 2, since the dew tray for receiving the defrosting water dropped from the cooler is provided, and the holder is attached above the dew tray with an inclination. The defrosting water can be smoothly discharged from the holder and can be received by the dew tray.

[Brief description of drawings]

FIG. 1 is a front view of a cooling storage container according to the present invention.

FIG. 2 is a perspective view of a cooling device.

FIG. 3 is a plan view of the cooling device.

FIG. 4 is a perspective view of a unit base.

FIG. 5 is a partial vertical sectional side view of the upper part of the cooling storage.

FIG. 6 is a vertical sectional front view of the upper part of the cooling storage.

FIG. 7 is a perspective view of a unit base as another embodiment.

FIG. 8 is a left side view of an upper longitudinal section of the cooling storage.

FIG. 9 is a perspective view of a cooler.

FIG. 10 is a perspective view of a unit base and a cool air duct panel.

FIG. 11 is a bottom view of the cold air duct panel.

FIG. 12 is a right side view in vertical section of the upper part of the cooling storage.

FIG. 13 is a diagram illustrating an open / closed state of a cold air duct panel.

FIG. 14 is a perspective view of the cold air duct panel when opened.

FIG. 15 is a partially enlarged view of the inside of the cool air duct panel.

[Explanation of symbols]

R cooling device 1 cooling storage 2 Insulation box 2A roof 3 storage room 6 openings 7 unit base 12 cooling boxes 14 Cooler 15 Cooler blower 16 openings 21 Cold air duct panel 22, 23 Cold air outlet 24 Cold air intake 25 Bottom cold air inlet 27 dividers 28 division wall 42 fan case 43 props 44A, 44B Refrigerant passage 45 Refrigerant piping 46 Junction 47 Holder 48 fixed plate 49 plate fins 50 Defrosting completion sensor 51 Dew tray

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshige Hayashi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Akihiko Chiba             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F-term (reference) 3L045 AA07 DA02                 3L046 AA05 AA07 BA03 CA02 GA01                       GB01 MA04

Claims (3)

[Claims] 1. A cooling device provided with a cooler constituted by a refrigerant pipe, wherein the refrigerant pipe constitutes a plurality of refrigerant passages for diverting the refrigerant into the cooler and constitutes each refrigerant passage. A cooling device, wherein all the refrigerant pipes are provided with defrosting completion detection sensors in a heat exchange manner at a location before the refrigerant pipes merge with each other after the refrigerant pipes have come out of the cooler. 2. A heat-conducting holder for holding the defrosting completion sensor is installed so as to exchange heat with all the refrigerant pipes, and the air is located on the side opposite to the blower that ventilates the cooler. The cooling device according to claim 1, wherein the defrosting completion detection sensor can be attached to the holder through a passage opening. 3. The cooling device according to claim 2, further comprising a dew tray that receives defrosting water that is dripped from the cooler, and the holder is attached at an angle above the dew tray.