JPH04227454A - Refrigerator - Google Patents

Abstract

PURPOSE:To provide a refrigerator which can reduce number of manufacturing steps, facilitate maintenance and obtain a strength at the time of moving. CONSTITUTION:A refrigerator device 3 is integrally associated with a truck 5, and a heat insulation box 2 for forming a cold storage chamber is detachably assembled with the unit 3. An exhaust duct 4 for forming an exhaust passage for discharging the air heated through a refrigerant condenser 12 is so disposed as to cover the rear surface of a unit case 7 with the box 2, and operated as a function of a reinforcing duct for securing the case 7 to the box 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to refrigerators.

0002

[Prior Art] Conventional refrigerators are made up of an inner box and an outer box, in which functional parts that make up a refrigerator are assembled in advance on an inner box that forms a refrigerator compartment and an outer box that forms an outer wall. A heat insulating box that becomes the refrigerator body is manufactured by foaming and filling a heat insulating material (urethane) inside the space (see Japanese Patent Application Laid-open No. 105878/1987). Also, JP-A-58
Japanese Patent No. 150783 proposes a refrigerator in which a refrigerator unit is detachably attached to the refrigerator body.

0003

[Problem to be solved by the invention] However, in JP-A-60
The refrigerator disclosed in Publication No. 105878 requires the refrigerating machine parts to be assembled into the inner box and the outer box in advance, which increases the number of manufacturing steps. It had problems such as requiring time and effort to maintain.

On the other hand, in the refrigerator disclosed in Japanese Patent Application Laid-Open No. 58-150783, only the refrigerator itself is loaded onto a truck and transported, and at the destination, the refrigerator unit is mounted on the top or back of the refrigerator body. Installed and used. Therefore, when using the refrigerator as a mobile refrigerator with the refrigerator unit attached to the refrigerator main body, there remains a problem in the strength of the refrigerator.

The present invention has been made based on the above circumstances, and its purpose is to provide a refrigerator that can reduce manufacturing man-hours, is easy to maintain, and can ensure strength during transportation. be.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an insulating box forming a refrigerating room, a refrigerator unit for cooling the inside of the insulating box, and a moving trolley. The technical means is that the refrigerator unit is integrally assembled to the truck, and the heat insulation box is detachably assembled to the refrigerator unit.

[0007]

[Operations and Effects of the Invention] The refrigerator of the present invention having the above structure has a heat insulation box detachably attached to the refrigerator unit, so it is different from conventional refrigerators in which refrigerator parts are assembled in the heat insulation box in advance. In comparison, the number of manufacturing steps can be reduced and maintenance can be easily performed.

[0008]Furthermore, since the refrigerator unit is integrally assembled on the moving trolley, the heavy refrigerator unit is located at the bottom, and the insulation box is placed on top of the refrigerator unit. . Therefore, even when the refrigerator is moved, it is structurally stable and has sufficient strength.

[0009]

[Embodiment] Next, a refrigerator of the present invention will be explained based on an embodiment shown in the drawings. FIG. 1 is an exploded perspective view of the refrigerator. The refrigerator 1 of this embodiment includes a heat insulating box 2 forming a refrigerator compartment 2a (see FIG. 3), a refrigerator unit 3 for cooling the inside of the heat insulating box 2, and an exhaust passage for the refrigerator unit 3. It is composed of an exhaust duct 4 and a cart 5 to which casters 5a for movement are attached.

The heat insulating box 2 is manufactured by integrally foaming and injecting a heat insulating material such as urethane, and has a door 6 attached to the front surface for taking in and taking out items to be refrigerated. It should be noted that an air rib 6a made of a heat insulating material is pasted over almost the entire surface of the back surface of the door 6 (on the side of the refrigerator compartment 2a). The bottom surface of the heat insulating box 2 is formed with a stepped recess 2b over the entire circumference for connection with a unit case 7, which will be described later. As shown in FIG. 3 (side sectional view of the refrigerator 1), the bottom wall of the insulation box 2 has a cold air intake port 8 and a cold air intake port for communicating the refrigerator compartment 2a and the inside of the unit case 7 to circulate cold air. A discharge port 9 is provided. Further, a cold air duct 10 communicating with the cold air outlet 9 is installed on the back side of the refrigerator compartment 2a.

As shown in FIG. 2 (plan view of the refrigerator unit 3), the refrigerator unit 3 includes functional parts such as a refrigerant compressor 11, a refrigerant condenser 12, and a refrigerant evaporator 13, which constitute a refrigeration cycle. , a condenser fan 14 for blowing air to the refrigerant condenser 12, an evaporator fan 15 for blowing air to the refrigerant evaporator 13, and a unit case 7 made of a heat insulating material such as urethane like the insulation box 2.

The unit case 7 is in the form of a box with an open ceiling, and is fixed to the cart 5. A stepped convex portion 7a that fits into a stepped concave portion 2b formed in the heat insulating box 2 is formed around the entire upper surface of the unit case 7. Furthermore, two drain outlets 16 are provided on the bottom wall of the unit case 7 and on the trolley 5.

Refrigerant evaporator 13 and evaporator fan 15
is arranged in the hollow part of the unit case 7, and the refrigerant compressor 11, the refrigerant condenser 12, and the condenser fan 14 are
It is arranged outside the unit case 7 and is directly fixed to the trolley 5. The refrigerator unit 3 is integrally assembled to the trolley 5 with the functional parts connected by refrigerant piping (not shown) arranged as described above (see FIG. 2).

The cold air cooled by the refrigerant evaporator 13 is sent by the evaporator fan 15 through the cold air inlet 8, the cold air duct 10, and the cold air outlet 9, as shown by the solid arrow in FIG. It circulates within the unit case 7 and the refrigerator compartment 2a.

The exhaust duct 4 is arranged to cover the back surfaces of the unit case 7 and the heat insulation box 2, and is fixed at both ends with appropriate bolts 17. This exhaust duct 4 forms an exhaust passage for discharging the heated air passing through the refrigerant condenser 12 upward, and also functions as a reinforcing duct for fixing the unit case 7 and the heat insulation box 2. In addition,
In FIGS. 1 and 3, the number 4a is an outside air intake port formed in the exhaust duct 4. As shown in FIG.

Next, the procedure for assembling this refrigerator 1 will be explained. First, the heat insulating box 2 is assembled to the unit case 7 of the refrigerator unit 3 which is integrally assembled to the trolley 5. At this time, after fitting the stepped protrusion 7a of the unit case 7 and the stepped recess 2b of the heat insulation box 2, as shown in FIG. The insulation box 2 is fixed to the unit case 7 by tightening the bolt 19 to the installed embedded nut 18.

In assembling the unit case 7 and the insulation box 2, a rubber shield 20 is placed on the side surface of the ceiling of the refrigerant evaporator 13, and when the insulation box 2 is fixed, this rubber shield 20 is pressed. By deforming elastically,
Airtightness is ensured before and after the refrigerant evaporator 13 (upstream and downstream sides) (see FIG. 3).

Then, the exhaust duct 4 is attached to the assembled unit case 7 and insulation box 2, and the entire assembly is completed. At this time, the exhaust duct 4 is fixed by tightening the bolts 17 to the embedded nuts 21 appropriately attached to the unit case 7 and the insulation box 2, as shown in FIG.

As described above, in this embodiment, by assembling the unitized refrigerator together with the trolley 5 (assembling), the insulation box 2 can be removably assembled to the refrigerator unit 3. Can be attached. As a result, compared to the conventional refrigerator 1 in which refrigerator parts are assembled into the heat insulating box 2 in advance, the number of manufacturing steps can be reduced and maintenance can be performed easily.

Furthermore, by assembling the refrigerator unit 3 integrally with the trolley 5, the heavy refrigerator unit 3 is located at the bottom of the entire refrigerator 1, and an insulating box is placed above the refrigerator unit 3. 2 will be placed. Therefore, even when the refrigerator 1 of this embodiment is moved and used, it is possible to increase the tipping angle (make it difficult to tip over) and ensure sufficient structural strength.

Furthermore, since the exhaust duct 4 fixed to the unit case 7 and the insulation box 2 functions as a reinforcing material,
Furthermore, the strength can be improved.

Next, a second embodiment of the present invention will be described. FIG. 5 is an exploded perspective view of the refrigerator, FIG. 6 is a plan sectional view of the refrigerator,
FIG. 7 is a side sectional view of the refrigerator. In explaining this embodiment, parts having the same functions as those of the first embodiment are given the same numbers.

The refrigerator 1 of this embodiment has a refrigerant evaporator 13 of a refrigerator unit 3 in a heat insulating box 2 forming a refrigerator compartment 2a.
It has a structure in which an evaporator fan 15 and an evaporator fan 15 are arranged.

The heat insulating box 2 is manufactured by integrally foaming and injecting a heat insulating material such as urethane, and has a door 6 attached to the front surface for taking in and taking out items to be refrigerated. This insulation box 2
is provided with three side plates 2c constituting its both sides and back surface extending a predetermined length L (see FIG. 7) downward from a bottom plate 2d forming the floor of the refrigerating compartment 2a.

A plurality of nuts 22 are embedded in advance at appropriate intervals in the lower end surfaces of the three side plates 2c (see FIG. 6, cross-sectional view taken along line A-A in FIG. 7), and The insulation box 2 is attached to the truck 5 by tightening the bolt 23 to the nut 22 from below the truck 5 through the bolt hole 5b provided near the outer periphery.

Therefore, a space surrounded by three side plates 2c is formed between the trolley 5 and the bottom plate 2d of the insulation box 2, and in this space, the refrigerant compressor 11 of the refrigerator unit 3, the refrigerant condensing The container 12, the condenser fan 14, the control box 24 for controlling the refrigeration cycle, and the like are accommodated. A cover 25 is screwed to the front side of the space, and maintenance of the refrigerator unit 3, control box 24, etc. can be performed by removing this cover 25. Note that the cover 25 is formed with an air intake port 25 a for blowing air into the refrigerant condenser 12 .

The bottom plate 2d of the insulation box 2 has a
An opening 26 for inserting the refrigerant evaporator 13 and the evaporator fan 15 is formed over almost the entire width of the refrigerator compartment 2a.

[0028] In the refrigerator unit 3, a refrigerant condenser 12 is installed on the left front portion of the truck 5, and a condenser fan 14 is attached to the upper part of the refrigerant condenser 12. This refrigerant condenser 12 and condenser fan 14 are covered by a duct case 27 for forming an air passage passing through the refrigerant condenser 12. The duct case 27 has an opening on the front side as an air introduction port. The introduction port is opened to the outside through an intake port 25a formed in the cover 25 described above.

The truck 5 is also provided with an exhaust port 28 (see FIG. 7) below the refrigerant condenser 12 for discharging the heated air that has passed through the refrigerant condenser 12. .

The refrigerant compressor 11 is placed behind the refrigerant condenser 12 and is directly fixed to the truck 5. Both ends of the refrigerant evaporator 13 are supported by stays 29, and the refrigerant evaporator 13 is mounted on the trolley 5 such that it is positioned above the trolley 5 by a predetermined height.
is attached to the rear side of the The refrigerant evaporator 13 and the evaporator fan 15 are connected to the bottom plate 2 of the insulation box 2 when the insulation box 2 is assembled to the trolley 5 from above the refrigerator unit 3.
It is inserted into the inside of the insulation box 2 (refrigerating compartment 2a) through the opening 26 formed in d, and as shown in FIGS. 6 and 7,
It is arranged along the rear wall surface of the refrigerator compartment 2a.

The refrigerant evaporator 13 and evaporator fan 15 disposed in the refrigerator compartment 2a are covered with a cover 30 to prevent them from coming into contact with objects to be refrigerated stored in the refrigerator compartment 2a. As shown in FIG. 7, the cover 30 covers the refrigerator compartment 2a.
The refrigerant evaporator 13 functions as a duct that generates an air flow passing through the refrigerant evaporator 13 when the evaporator fan 15 operates.

The airflow generated by the operation of the evaporator fan 15 is as shown by the arrow in FIG. After that, it is blown out from the gap above the cover 30 and circulated in the refrigerator compartment 2a.

Opening 2 formed in the bottom plate 2d of the insulation box 2
After the refrigerant evaporator 13 and the evaporator fan 15 are inserted, the refrigerant evaporator 6 is hermetically sealed with a heat insulating seal plate 31 to prevent cold air from leaking from the refrigerator compartment 2a.

The refrigerator unit 3 is integrally assembled on the trolley 5 together with the control box 24, with the functional parts connected by refrigerant piping (not shown) arranged as described above. In addition, control box 2
4 is installed on the front side of the truck 5 adjacent to the refrigerant condenser 12.

Next, the procedure for assembling this refrigerator 1 will be briefly explained. First, the refrigerator unit 3, control box 24, etc. are assembled and fixed on the trolley 5. Thereafter, the insulation box 2 is placed on the cart 5 from above the refrigerator unit 3 and the control box 24. At this time, the refrigerant evaporator 13 and the evaporator fan 15 are inserted into the inside of the insulation box 2 (refrigeration compartment 2a) through the opening 26 formed in the bottom plate 2d of the insulation box 2. The insulation box 2 placed on the truck 5 is fixed to the truck 5 by tightening bolts 23 from the underside of the truck 5 to nuts 22 embedded in the lower end surfaces of the three side plates 2c of the insulation box 2. .

Then, the opening 26 formed in the bottom plate 2d of the heat insulating box 2 is closed with a heat insulating seal plate 31, and the refrigerant evaporator 13 is closed.
The evaporator fan 15 is covered with a cover 30, and the trolley 5
A cover 25 is screwed to the underfloor front surface (below the door) of the insulation box 2 fixed to the.

As described above, the refrigerator 1 of this embodiment has the refrigerant evaporator 13 placed directly inside the insulation box 2, which is different from the first embodiment in which the refrigerant evaporator 13 is installed under the floor of the insulation box 2. Compared to refrigerator 1, heat loss can be reduced.

Furthermore, in the refrigerator 1 of the first embodiment, the cold air cooled by the refrigerant evaporator 13 is distributed between the unit case 7 and the refrigerator compartment 2.
Since the structure circulates between unit case 7 and
It is necessary to airtightly seal the space between the refrigerator compartment 2a and the refrigerator compartment 2a, and the area of the heat-insulating seal portion becomes large. On the other hand, in this embodiment, since the refrigerant evaporator 13 is arranged in the refrigerator compartment 2a, basically the refrigerant evaporator 13 and the evaporator fan 15 are
It is necessary to seal only the opening 26 for inserting the refrigerator into the heat insulating box 2, and the sealing area can be reduced compared to the refrigerator 1 of the first embodiment, thereby providing a refrigerator 1 with excellent airtightness. be able to.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a refrigerator.

FIG. 2 is a plan view of the refrigerator unit.

FIG. 3 is a side sectional view of the refrigerator.

FIG. 4 is a cross-sectional view showing fixed parts of the heat insulation box, unit case, and exhaust duct.

FIG. 5 is an exploded perspective view of a refrigerator showing a second embodiment of the present invention.

FIG. 6 is a plan sectional view of a refrigerator showing a second embodiment of the present invention.

FIG. 7 is a side sectional view of a refrigerator showing a second embodiment of the present invention.

[Explanation of symbols]

1 Refrigerator 2　Insulation box 2a cold room 3 Refrigerator unit 5 Trolley

Claims (1)

[Claims] 1. A refrigerator unit comprising: a) a heat insulating box forming a refrigerating room; b) a refrigerator unit for cooling the inside of the heat insulating box; and c) a moving trolley, wherein the refrigerator unit is connected to the trolley. is assembled into one piece,
A refrigerator characterized in that the insulation box is detachably assembled to the refrigerator unit.