JPH0771862A - Cooling device - Google Patents

Abstract

PURPOSE:To make it possible to prevent effectively any inconvenience created by the heat generated when a cooling unit is removing frost, thus adversely affecting the internal part of a heat storage chamber. CONSTITUTION:A cooling unit 2 is installed inside a storage chamber of a prefabricated refrigerator. Cooled air is supplied into the storage chamber from the cooling unit 2, thereby performing cooling operation. Into the cooling unit 2, there are installed a cooler, a fan 32 and a defrosting heater 41 for the fan 32. The cooled air which is sucked up from a suction port by driving the fan 32 is heat-exchanged with the cooler. The heat-exchanged cooled air is compulsorily circulated from a discharge port 33 into the storage chamber. The defrosting heater 41 is mounted at the position separated from the discharge port 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for cooling a storage unit having a heat insulating wall by installing a cooling unit therein.

[0002]

2. Description of the Related Art Conventionally, this type of cooling device is disclosed in, for example, Japanese Patent Publication No. 58-48825 (F25D17 / 06) and Japanese Patent Application No. 4-295856 filed by the applicant earlier.
A cooler and a blower are installed in the heat insulating box, and the air in the storage chamber is sucked from the suction port by the operation of the blower to exchange heat with the cooler, and the cooled cool air is discharged from the discharge port into the storage chamber for cooling. Is configured to.

In particular, in a large-sized cooling device such as a prefabricated refrigerator, a cooling unit having a cooler and a blower built therein is installed in a storage chamber constructed by assembling prefabricated panels, and a condensing unit placed separately in the cooler. A configuration is adopted in which more cooling medium is supplied to exert a cooling action, and heat is exchanged with the air sucked from the suction port by the operation of the blower, and the cool air cooled thereby is discharged from the discharge port into the storage chamber.

[0004]

By the way, in the coolers and blowers of these cooling units, moisture in the storage chamber grows as frost and grows. Therefore, it is necessary to defrost appropriately. Therefore, conventionally, a defrost heater is provided on the discharge port side of the blower to heat the blower, but the heat from the defrost heater leaks into the storage chamber through the discharge port. Further, the heat of the defrosting heater that heats the cooler also leaks into the storage chamber through the suction port, so that there is a problem that these heats adversely affect the frozen food and the like in the storage chamber.

The defrosting water from these coolers and blowers must be received by the dew tray provided below them and discharged to the outside by the drain hose. When it is installed on the surface, the position of the dew tray becomes low, so that there is also a problem that a U trap for preventing cold air leakage cannot be configured in the middle of the drainage path.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and has the disadvantage that the heat generated during defrosting of the cooling unit installed in the storage chamber adversely affects the storage chamber. An object is to provide a cooling device that can be effectively prevented.

Another object of the present invention is to provide a cooling device capable of smoothly discharging defrost water from a cooler and a blower in a cooling unit and effectively preventing cold air from leaking from a drainage path. To do.

[0008]

That is, a cooling device (prefabricated refrigerator) 1 according to the invention of claim 1 has a cooling unit 2 installed in a storage chamber 4 constituted by a heat insulating wall (prefabricated panel) 3. Cooling air is supplied from the cooling unit 2 into the storage chamber 4 for cooling, and a cooler 14, a blower 32, and a defrosting heater 41 of the blower 32 are provided in the cooling unit 2, and The cool air that has been sucked from the suction port 33 by the operation and exchanged heat with the cooler 14 is discharged from the discharge port 33.
Is forcedly circulated in the storage chamber 4, and a defrost heater 41 is attached to a position apart from the discharge port 33.

In the cooling device (prefabricated refrigerator) 1 according to the second aspect of the present invention, the cooling unit 2 is installed in the storage chamber 4 constituted by the heat insulating wall (prefabricated panel) 3 and stored from the cooling unit 2. Cooling is performed by supplying cold air into the chamber 4, and a cooling unit 14, a defrosting heater 23 and a blower 32 of the cooling unit 14 are provided in the cooling unit 2, and the suction port is operated by the blower 32. Cold air that has been sucked from 16 and has exchanged heat with the cooler 14 is discharged from the discharge port 33 to the storage chamber 4
The suction port 16 is provided with a damper 19 for closing the suction port 16 when the defrosting heater 23 defrosts the cooler 14 while forcibly circulating the inside.

Further, in the cooling device (prefabricated refrigerator) 1 of the invention of claim 3, a cooling unit 2 is installed in a storage chamber 4 constituted by a heat insulating wall (prefabricated panel) 3 and stored from the cooling unit 2. Cooling is performed by supplying cool air into the chamber 4, and the cooler 14, the defrost heater 23 and the blower 32 of the cooler 14, and the defrost heater 41 of the blower 32 are provided in the cooling unit 2. The cooler-side dew tray 21 is provided below the cooler 14, and the blower-side dew tray 37 is placed below the blower 32, and the cooler-side dew tray 21 and the blower-side dew tray 37 receive the cooler-side dew tray 21. A collective dew tray 53 for collecting defrosted water and discharging it to the outside is provided.

Furthermore, in the cooling device (prefabricated refrigerator) 1 of the fourth aspect of the invention, the heater 46 is detachably attached to the lower surface of the bottom wall of the collective dew tray 53 in the above.

[0012]

A cooling device (prefabricated refrigerator) according to the invention of claim 1
According to 1, the frost attached to the blower 32 by the cooling operation can be melted and removed by the defrost heater 41, and since the defrost heater 41 is attached at a position separated from the discharge port 33, it is removed during defrosting. The heat generated from the frost heater 41 is less likely to leak into the storage chamber 4 through the discharge port 33. Therefore, the temperature rise of the storage chamber 4 due to the heat during defrosting can be effectively suppressed.

According to the cooling device (prefabricated refrigerator) 1 of the second aspect of the invention, the frost attached to the cooler 14 can be melted and removed by the defrosting heater 23 by the cooling operation, and the suction port 16 can be cooled. Since the damper 19 that closes the defroster 14 when it is defrosted is attached, the heat generated from the defrosting heater 23 during defrosting does not easily leak into the storage chamber 4 through the suction port 16. Therefore, the temperature rise of the storage chamber 4 due to the heat during defrosting can be effectively suppressed.

Further, according to the cooling device (prefabricated refrigerator) 1 of the invention of claim 3, the frost attached to the cooler 14 and the blower 32 can be melted and removed by the defrost heaters 23 and 41 by the cooling operation, and at the same time, the cooler. 14 and blower 32
The defrosting water dripped from is received by the cooler-side dew tray 21 and the blower-side dew tray 37, respectively. Then, the defrosting water received by the dew trays 21 and 37 is temporarily collected in the dew tray 53.
It is not necessary to form a U-trap in the drain hose or the like, because it is collected and collected and then discharged to the outside.

Furthermore, according to the cooling device (prefabricated refrigerator) 1 of the invention of claim 4, in addition to the above, the collective dew tray 53.
Since the heater 46 is provided on the bottom surface of the bottom wall of the
Since the re-freezing of the defrosted water is prevented and the drainage is smoothed, and the heater 46 is provided on the lower surface of the bottom wall of the collective dew tray 53, there is no risk of leakage due to flooding, and waterproofing is performed. There is no need to apply. Further, since the heater 46 is detachably attached, the replacement work can be easily performed even when the heater 46 is broken.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a perspective view of a refrigeration-type prefabricated refrigerator 1 as an embodiment of a cooling device, FIG. 2 is a front view of a cooling unit 2 of the present invention, FIG. 3 is a plan view of the cooling unit 2, and FIG. It is a perspective view of the unit 2. Prefabricated refrigerator 1
Is used as a quick cooler for rapidly freezing foods, etc. By combining a plurality of prefabricated panels 3 ... As heat insulating walls, front, rear, left and right wall surfaces, a top surface and a floor surface are formed. A storage chamber 4 is formed inside. The prefabricated panel 3 which is the front surface of the prefabricated refrigerator 1 is formed with an entrance 7 for allowing a cart 6 carrying food and a worker to enter and leave the storage room 4 and
And the controller 8 is attached to the front prefabricated panel 3 in parallel, and the inlet 7 is closed by a heat insulating door (not shown).

A cooling unit 2 is installed on the floor surface of the back of the storage chamber 4 of the prefabricated refrigerator 1. As shown in FIGS. 2 to 4, the cooling unit 2 is composed of a cooler side unit 11 and a blower side unit 12 which are separate bodies. The cooler side unit 11 includes a vertically long cooler side case 13, a plate fin type cooler 14 vertically provided in the cooler side case 13, and the like. A suction port 16 is formed on the front surface of the cooler-side case 13, and a front plate 17 is attached to one side of the front surface side by side.

The cooler 14 is attached to the rear of the suction port 16 so as to correspond thereto. A plurality of guards 18 composed of filaments are attached to the suction port 16 in the vertical and horizontal directions, and a plurality of horizontally mounted dampers 19 are vertically attached to the rear side of the guard 18 at predetermined intervals. There is. Each damper 19 has a cooler side case 1 on both upper ends.
3 is rotatably pivotally supported, and when the pressure before and after that is balanced, it hangs down as shown in FIG.
9, 19 come into contact with each other, thereby closing the suction port 16, but when the cooler 14 side has a negative pressure, the lower ends of the dampers 19 are sucked rearward and lifted as shown in FIG. 8, whereby the suction port 16 is closed. It is configured to open.

A cooler-side dew tray 21 is attached to the lower part of the cooler-side case 13 so as to correspond to the lower part of the cooler 14, and an electrical equipment box 22 is provided below the cooler-side dew tray 21.
Further, a cooler defrost heater 23 is arranged on the front surface of the cooler 14, and its wiring 24 and wiring (not shown) of the electrical equipment box 22 are inside the cooler-side case 13 behind the front plate 17 as shown in FIG. It is drawn into the constructed space S.
Further, the pipe 26 from the cooler 14 is also drawn into the space S, and the wiring 24 and the pipe 26 are drawn out above, for example, the top wall of the cooler-side case 13. In addition, both side walls of the cooler side case 13 (not shown) are detachable,
Alternatively, it is assumed that an opening (not shown) that can be opened and closed is formed over substantially the entire side walls.

Next, the blower side unit 12 has a vertically long blower side case 31 and blowers 32, 32 which are composed of propeller fans arranged vertically inside the blower side case 31.
Etc. A discharge port 33 is formed on the front surface of the blower-side case 31. The blowers 32, 32 are supported by a fan case 39 attached behind the discharge port 33 as shown in FIGS.
A plurality of guards 34 formed of filaments are attached to 3 in the vertical and horizontal directions. Further, a plurality of louvers 36 extending in the vertical direction are attached to the rear side of the guard 34 at predetermined intervals on the left and right. The louver 36 is oriented in the front-rear direction, and has a function of rectifying the air discharged from the blowers 32, 32 and blowing the air forward.

A blower side dew tray 37 is attached to the lower part of the blower side case 31 corresponding to the lower side of the blowers 32, 32, and an electric equipment box 40 is provided below it. A base 38 is attached to the lower side of each of the blowers 32, 32, and a blower defrost heater 41 is attached to each of the bases 38, 38 at a position separated from the discharge port 33.

The procedure for assembling the prefabricated refrigerator 1 according to the present invention having the above structure will be described. First, a plurality of prefabricated panels 3 are assembled to form the storage chamber 4 and the inlet 7. Next, the cooler-side unit 11 and the blower-side unit 12 that have been separated in advance are separately carried into the storage chamber 4 through the inlet 7. Next, both units 11 and 12 are installed and connected. Here, for example, the left end (on the front plate 17 side) of the cooler side case 13 and the top wall of the blower side case 31 are directed toward the top wall. For example, connecting plates 51 and 52 are attached to the right ends, respectively. Then, the left side wall of the cooler side case 13 is removed as described above, and the right side wall of the blower side case 31 is also removed. Next, for example, the cooler-side case 13 is arranged at a predetermined position in advance, and the pipe 26 drawn into the space S opened to the left is connected to a condensation unit (not shown), and also in the space S. Wire 24 being pulled in
Etc. are connected to external wiring connected to the controller 8 etc.

On the other hand, the blower 3 of the blower side unit 12
The wirings of 2, 32, the blower defrosting heater 41, and the electrical equipment box 40 are pulled out and placed on the right side of the blower side case 31, and are connected to other wirings 24 of the cooler side unit 11 in the space S. Next, the blower side case 31 is provided on the left side of the cooler side case 13, and the connecting plates 51 and 52 are butted and fixed to each other by screws (the lower part is also connected by a connecting member not shown). Both cases 13 and 31 are connected.

Further, the cooler-side dew tray 21 is preliminarily tilted to the lower left and the blower-side dew tray 37 is preliminarily tilted to the lower right. When the two units 11 and 12 are connected, the lower part of the space S is The drain ports are opened above the collective dew tray 53, respectively. The collective dew tray 53 is detachably held by, for example, a dew tray guide plate 42 fixed to the cooler side case 13, and a drain port 43 is formed on one side wall thereof as shown in FIG. A drain hose 44 is connected to 43. Further, the outlets of the blower-side dew tray 37 and the cooler-side dew tray 21 are arranged at positions where they are immersed in defrost water in the collective dew tray 53, whereby both dew trays 2
The cold air that leaks to the outside through 1 and 37 is blocked. Therefore, the U that was conventionally formed on the drain hose 44 and the like
Traps are no longer needed.

Here, a heater 46 is attached to the lower surface of the bottom wall of the collecting dew tray 53 as shown in FIGS. The heater 46 is inserted between the heater guide 47 attached to the bottom wall and the bottom wall, and is fixed to the collective dew tray 53 by the removable metal fitting 48. Therefore, when the heater 46 is disconnected, etc. The above-mentioned stopper 4
Replacement work can be easily performed by removing 8.

In this state, the insides of both cases 13 and 31 communicate with each other through the open side wall portions. Therefore, when the unillustrated condensing unit and the blowers 32, 32 are operated, the blowers 32, 32 suck air from the rear side and discharge the air to the front discharge port 33, so that the cooler side connected to the inside of the blower side case 31. The air in the case 13 is sucked into the blower-side case 31. As a result, the cooler side case 13
Since the inside becomes negative pressure, the damper 19 opens as described above,
The air in the storage chamber 4 is sucked from the suction port 16 toward the cooler 14.

Refrigerant is supplied to the cooler 14 from the condensing unit and evaporates to exert a cooling effect, so that the air in the storage chamber 4 flowing into the cooler 14 is cooled. The cool air that has been heat-exchanged with the cooler 14 in this way moves to the blower side unit 12, is accelerated by the blowers 32, 32, and is discharged from the discharge port 33 into the storage chamber 4. Here, when the blowers 32, 32 are propeller fans, the discharged cool air tries to go in the radial direction (outward direction), but since the louver 36 is attached to the discharge port 33, the discharged cool air is It is directed to the front of the blower side unit 12. Further, the front plate 17 is provided between the suction port 16 of the cooler-side unit 11 and the discharge port 33 of the blower-side unit 12.
Since the space S exists (that is, the space S), a so-called short cycle in which the cool air discharged from the discharge port 33 is directly sucked into the suction port 16 is unlikely to occur. Therefore, since the discharged cool air circulates substantially all over the storage chamber 4 vertically and horizontally as shown by the arrow in FIG. 1, the cool air is sucked into the cooler-side unit 11 from the suction port 16. The food on the cart 6 stored in the storage room 4 is smoothly frozen.

The compressor (not shown) of the condensing unit is controlled to operate / stop at a set temperature such as -20.degree. C. based on the temperature in the storage chamber 4, but the blowers 32, 32
Is always operated. In addition, in such a cooling operation, the cooler 14
Since frost grows on the blowers 32 and 32, the compressors and blowers 32 and 32 are periodically stopped, and the cooler defrost heater 23 and the blower defrost heater 4 are used.
1 is heated to heat the cooler 14 and the blowers 32, 32 to melt and remove. At that time, the cooler 14 and the blower 3
The defrosting water dropped from Nos. 2 and 32 is demanded by the cooler-side dew tray 21 and the blower-side dew tray 37, respectively.
3 and is discharged to the outside by the drain hose 53.

At this time, since the heater 46 on the lower surface of the collective dew tray 53 is also energized to generate heat, the collective dew tray 5
The inconvenience that the defrosted water collected in 3 is re-frozen by the surrounding cool air is solved, and thereby the defrosted water is smoothly discharged. Further, since the heater 46 is located on the lower surface of the bottom wall of the collective dew tray 53, there is no risk of flooding even if defrost water flows in. Therefore, the heater 46
It is also possible to reduce the cost because it is not necessary to apply waterproof treatment to the.

Although the direction in which the drain hose 44 is pulled out differs depending on the installation position of the cooling unit 2,
When the drain hose 44 is pulled out backward, the drain port 43 is positioned on the side surface as shown in FIG. 10, and the drain hose 44 bent 90 degrees from there is extended rearward. On the other hand, in the situation where the drain hose 44 must be pulled out to the side, the collective dew tray 53 is once removed from the dew tray guide 42 and rotated 90 degrees as shown in FIG. 11 to position the drain port 43 on the rear surface.
In this state, the drain hose 44, which is also bent 90 degrees, is connected to the drain port 43, so that the drain hose 44 can be pulled out to the side of the cooling unit 2.

On the other hand, since the blowers 32, 32 during defrosting are stopped as described above, the negative pressure in the cooler-side case 13 is eliminated and becomes equal to the outside air pressure. Therefore, the damper 19 ...
9 droops and closes the suction port 16 as shown in FIG. 9, so that the heat of the cooler defrost heater 23 does not easily leak to the storage chamber 4 direction. In addition, the blower side heater 41 is also the blower 3 as described above.
The discharge port 33 is attached to the base 38 on the lower side of the 2, 32.
Since it is separated from the air blower 32, the heat leakage to the storage chamber 4 is smaller than that in the conventional case where it is provided in front of the blowers 32, 32.
In general, the adverse effect of defrosting the frozen food in the storage room 4 can be minimized.

Although the present invention is applied to the prefabricated refrigerator in the embodiments, the present invention is not limited to this, and the present invention is also effective for other refrigerators or showcases.

[0033]

As described above in detail, according to the invention of claim 1, the frost attached to the blower by the cooling operation can be melted and removed by the defrost heater, and the defrost heater is attached at a position separated from the discharge port. Therefore, the heat generated from the defrost heater during defrosting does not easily leak into the storage chamber from the discharge port. Therefore, it becomes possible to effectively suppress the temperature rise of the storage chamber due to the heat at the time of defrosting, prevent the occurrence of damage to the stored articles, and improve the cooling efficiency.

According to the second aspect of the present invention, the frost attached to the cooler during the cooling operation can be melted and removed by the defrost heater, and a damper for closing the frost when the cooler is defrosted is attached to the suction port. Therefore, the heat generated from the defrost heater during defrost leaks into the storage chamber through the suction port. Therefore, it becomes possible to effectively suppress the temperature rise of the storage chamber due to the heat at the time of defrosting, prevent the damage of the stored article from occurring, and improve the cooling efficiency.

Further, according to the third aspect of the invention, the frost adhering to the cooler and the blower during the cooling operation can be melted and removed by the defrost heater, and the defrost water dropped from the cooler and the blower is exposed to the dew on the cooler side. It is received by the pan and the dew pan on the side of the blower, and then collected in the collective dew pan and then discharged to the outside. Therefore, this collective dew tray prevents cold air from leaking from the cooler-side dew tray and the blower-side dew tray, so there is no need to form a U trap in the drain hose or the like, and the position of the dew tray is low. It is extremely effective when a U trap cannot be formed.

Further, according to the invention of claim 4, in addition to the above, since the heater is provided on the lower surface of the bottom wall of the collecting dew tray, refreezing of defrost water in the collecting dew tray is prevented and drainage is smoothed. In addition, since the heater is provided on the lower surface of the bottom wall of the collective dew tray, there is no risk of electric leakage due to flooding, and there is no need for waterproofing. In addition, since the heater is detachably attached, the replacement work can be easily performed even when the heater is broken.

[Brief description of drawings]

FIG. 1 is an internal perspective view of a prefabricated refrigerator as an embodiment of the present invention.

FIG. 2 is a front view of a cooling unit.

FIG. 3 is a plan view of a cooling unit.

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

FIG. 5 is an internal perspective view of a cooler side unit portion of the cooling unit.

FIG. 6 is a diagram illustrating a structure inside a blower side unit of the cooling unit.

FIG. 7 is a perspective view of a discharge port portion of a blower side unit.

FIG. 8 is a perspective view of the cooler-side unit with a damper opened.

FIG. 9 is a perspective view of the cooler-side unit with the damper closed.

FIG. 10 is a perspective view of a collective dew tray.

FIG. 11 is a perspective view of the collective dew tray in a state where the collective dew tray is rotated by 90 degrees and attached.

FIG. 12 is a perspective view of a collective dew tray.

FIG. 13 is a bottom view of the collective dew tray.

[Explanation of symbols]

 1 Prefabricated Refrigerator 2 Cooling Unit 3 Prefabricated Panel 4 Storage Room 14 Cooler 16 Suction Port 21 Cooler Side Dew Receiver 23 Cooler Defrost Heater 32 Blower 33 Discharge Port 37 Blower Side Dew Receiver 41 Blower Defrost Heater 46 Heater 53 Assembly Dew tray

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuhiro Maeda 2-18 Keihan Hon-dori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Masaki Negishi 2-18-18 Keihan-hondori, Moriguchi-shi, Osaka Sanyo Denki Within the corporation

Claims (4)

[Claims] 1. A cooling device in which a cooling unit is installed in a storage chamber constituted by a heat insulating wall, and cooling air is supplied from the cooling unit to the storage chamber to cool the storage unit. The defrosting heater of the blower is provided, and the cool air sucked from the suction port by the operation of the blower and having exchanged heat with the cooler is forcedly circulated from the discharge port into the storage chamber, and at a position separated from the discharge port. A cooling device equipped with a defrost heater. 2. A cooling device in which a cooling unit is installed in a storage chamber constituted by a heat insulating wall, and cooling air is supplied from the cooling unit to the storage chamber to cool the storage unit. A defrost heater and a blower for the cooling device are provided, and the cool air sucked from the suction port by the operation of the blower and having exchanged heat with the cooler is forcedly circulated from the discharge port into the storage chamber, and the defrosting is performed on the suction port. A cooling device comprising a damper that closes the suction port when defrosting the cooler with a heater. 3. A cooling device in which a cooling unit is installed in a storage chamber constituted by a heat insulating wall, and cooling air is supplied from the cooling unit to the storage chamber to cool the storage unit, and a cooler and the cooling unit are provided in the cooling unit. A defrosting heater for the air blower, a blower, and a defrosting heater for the blower are provided, a cooler-side dew tray is provided below the cooler, and a blower-side dew tray is provided below the blower, and the cooling is performed. A cooling device provided with a collective dew tray for collecting defrosted water received by the device-side dew tray and the blower-side dew tray and discharging the defrosted water to the outside. 4. The cooling device according to claim 3, wherein a heater is detachably attached to the bottom surface of the bottom wall of the collecting dew tray.