JPH10246551A - Manufacture of freezing refrigerator, prefabricated freezing refrigerator and cooling and circulating device for refrigerant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide productivity, capable of producing easily in a factory, and assembling property, capable of assembling easily at site, in a good balance by a method wherein one series of cooling pipe element, having a refrigerant supplying end and a recovery end, is provided along the inner surface of a side surface panel unit and a ceiling panel unit respectively. SOLUTION: A side surface panel unit 20S and a ceiling panel unit 20C are provided with the same structure substantially. A flat metallic sheet is bonded on the inner surface of a heat insulating board while a cooling pipe element 23 is fixed to the flat metallic sheet. Both ends of one series of cooling pipe element 23 are arrayed at the rim units of side surface panel units 20S and the ceiling panel unit 20C as the refrigerant supply end 27i and the refrigerant recovering end 27o respectively. The connection of the refrigerant supply ends 27i and the refrigerant recovering ends 27o to a refrigerant cooling and circulating device is effected under a condition that a refrigerating chamber is formed of the side surface panel units 20S, an outlet and inlet port panel unit 20E and a ceiling panel unit 20C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a freezer or refrigerator (referred to as a refrigerator), a prefabricated refrigerator and a refrigerant cooling and circulating apparatus.

[0002]

2. Description of the Related Art Freezers or refrigerators are conventionally produced in factories and transported to use sites. However, the larger the size, the higher the transportation cost. Construct a closed space with concrete structures on site,
There is also a field system that incorporates a cooling device in the closed space, but it is a one-item production and is not related to mass production in a factory. Further, a conventional refrigerator-freezer generally has a structure in which cool air of a cooling unit in a refrigerator is supplied into the refrigerator by a fan or the like, and the stored items may be adversely affected by cold air.

[0003]

The object of the present invention is to improve the productivity that can be produced in a factory,
An object of the present invention is to provide a method of manufacturing a refrigerator having a good balance of assemblability that can be easily assembled on site and a prefabricated freezer. Another object of the present invention is to provide a refrigerator that can uniformly cool and rub the inside of a refrigerator without requiring ventilation.

[0004]

SUMMARY OF THE INVENTION A method of manufacturing a refrigerator according to the present invention includes a series of cooling pipe elements each having a refrigerant supply end and a recovery end on the inner surface of at least three side panel units and at least one ceiling panel unit. Forming an entrance / exit panel unit having an entrance / exit; a closed space that becomes a freezing and refrigeration room on a foundation by the at least three side panel units, one ceiling panel unit, and the entrance / exit panel unit. Forming a refrigerant cooling and circulating device for cooling and circulating the refrigerant; and supplying the refrigerant to the cooling pipe elements of the side panel unit and the ceiling panel unit with the side panel unit and the ceiling panel unit installed on the foundation. Connect the end and the collection end directly or with another side panel unit or It is characterized by the production of refrigerator by a; via the coolant supply end and the recovery end of the cooling pipe elements of the ceiling panel unit, the step of connecting to the refrigerant cooling circuit device.

In the step of connecting the refrigerant supply end and the recovery end of the cooling pipe element to the refrigerant cooling and circulating device, at least a part of the refrigerant supply end and the recovery end of the cooling pipe element of the side panel unit and the ceiling panel unit are interconnected. Then, a series of cooling pipe passages can be formed by the cooling pipe elements between the plurality of side panel units or between the side panel unit and the ceiling panel unit. In other words, the refrigerant supply end and the recovery end of the cooling pipe element of each panel unit may be individually connected to the refrigerant cooling and circulating device, but the refrigerant supply end and the recovery end of the cooling pipe element of all panels are interconnected. do it,
The one refrigerant supply end and the recovery end may be connected to a refrigerant cooling and circulating device, or may be an intermediate type of both types.

[0006] More specifically, the step of providing the cooling pipe element on the side panel unit and the ceiling panel unit is performed, more specifically, so as to have a large number of straight portions parallel to each other via a U-shaped folded portion on the flat metal plate. Bringing the bent cooling pipe element into close contact with the cooling pipe element; a cooling plate having, on this cooling pipe element, alternately a U-shaped section for receiving the parallel straight section of the element and a flat section along the flat metal plate. And fixing the cooling pipe element and a flat metal plate having the cooling plate along the inner surface of the heat insulating plate.

A prefabricated refrigerator according to the present invention comprises at least three side panel units installed on a foundation to form a closed space, one entrance / exit panel unit having an entrance / exit, and at least one ceiling panel unit. A series of cooling pipe elements each having a refrigerant supply end and a recovery end provided along the inner surfaces of the side panel unit and the ceiling panel unit, respectively, in a unit state; A refrigerant cooling and circulating device that circulates the cooled refrigerant directly or through another refrigerant supply end and a recovery end of the cooling pipe element of another side panel unit or a ceiling panel unit. Connected to the computer.

Each of the side panel unit and the ceiling panel unit is, for example, an insulating plate; a flat metal plate along the inner surface of the insulating plate; and straight lines parallel to each other via a U-shaped folded portion. A cooling pipe element bent and formed so as to have a large number of portions, and a cooling pipe element closely attached to the flat metal plate; and a U-shaped cross section for receiving the parallel straight portion of the cooling pipe element and a flat portion along the flat metal plate. A cooling plate having alternately

The refrigerant cooling and circulating apparatus has a compressor, a condenser, and an evaporator assembly between a refrigerant recovery end and a supply end of a cooling pipe element. The evaporator assembly includes a condenser and a condenser. It has a plurality of parallel flow paths that connect in parallel with the refrigerant supply end, and an evaporator provided in each of the parallel flow paths, and each of the parallel flow paths has an on-off valve except for one normal flow path. Is preferably provided. By selectively using one or more parallel flow paths, it is possible to cope with an operation start, a normal operation, a load operation, and the like.

In this refrigerant cooling and circulating apparatus, a flow path from the refrigerant recovery end of the cooling pipe element to the compressor is provided.
It is preferable to pass the flow path from the condenser to the evaporator assembly through the same heat exchanger that exchanges heat of the refrigerant flowing through both flow paths. Since the temperature of the refrigerant flowing through the flow path from the recovery end to the compressor is lower than the temperature of the refrigerant flowing through the flow path from the condenser to the evaporator assembly, the heat exchanger allows the refrigerant from the condenser to the evaporator assembly to be cooled. It can be cooled primarily. This refrigerant cooling and circulating device can be applied to general refrigerators that circulate a cooled refrigerant through a cooling pipe inside the refrigerator, regardless of the prefab refrigerator, that is, other than the prefab refrigerator.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, three side panel units, one entrance / exit panel unit and one ceiling panel unit are used to produce the smallest and simple freezer. Larger freezers can be obtained by combining more or larger side panel units and ceiling units.

As shown in FIGS. 1 to 3, three side panel units 20S, one entrance panel unit 20E and one ceiling panel unit 2 are placed on the foundation 11.
The closed space that forms the freezing compartment 12 is formed by 0C. The door panel unit 20 </ b> E is provided with a hinged opening / closing door 13, and can enter and exit the freezing room 12 through the opening / closing door 13. These side panel unit 20S, doorway panel unit 20E, and ceiling panel unit 20C are manufactured (can be) in a factory, respectively.

The side panel unit 20S and the ceiling panel unit 20C have substantially the same structure.
Has the structure shown in FIG. A flat metal plate 22 is attached to the inner surface of the heat insulating plate 21, and a cooling pipe element 23 is fixed on the flat metal plate 22. The cooling pipe element 23 is bent so as to have a large number of straight portions 23S parallel to each other via a U-shaped folded portion 23T. On this cooling pipe element 23, a cooling plate 24 alternately having a U-shaped section 24U for receiving each linear portion 23S of the cooling pipe element 23 in close contact and a flat portion 24P along the flat metal plate 22 is overlapped. And is fixed to the flat metal plate 22. It is desirable that the cooling pipe element 23 through which the refrigerant flows is made of a copper-based material, and the flat metal plate 22 and the cooling plate 24
It is desirable to be made of an aluminum-based material having excellent heat conductivity (heat dissipation) and low cost. According to this three-layer structure, excellent cooling properties can be obtained.

The actual panel units 20S, 2S
In the production of 0C, the flat metal plate 22, the cooling pipe element 23 and the cooling plate 24 are first integrally formed into a metal unit, and then the flat metal plate 2 of this metal unit is formed.
The procedure of fixing 2 to the heat insulating plate 21 is preferable.

A group of U-shaped folded portions 23T at both ends of a large number of straight portions 23S of the cooling pipe element 23 are covered by side covers 25. This side cover 2
Reference numeral 5 has a concave portion 25R adapted to the positions and shapes of the many U-shaped folded portions 23T, and is provided mainly for the purpose of improving the appearance.

A series of cooling pipe elements 23 have both ends as a refrigerant supply end 27i and a refrigerant recovery end 27o.
Side panel unit 20S and ceiling panel unit 20C
It is lined up at the edge of. Each of the refrigerant supply ends 27i and the refrigerant recovery ends 27o may be individually connected to the refrigerant cooling and circulating device. However, as shown in FIG. 3, the refrigerant supply ends 27i and the refrigerant supply ends 27i of the side panel units 20S and the ceiling panel unit 20C are connected. The collection ends 27o may be connected to form a series of refrigerant pipe passages. The refrigerant supply end 27i and the refrigerant recovery end 27o are connected to the refrigerant cooling and circulating device 30 (FIG. 6) by the side panel unit 20S, the entrance / exit panel unit 20E, and the ceiling panel unit 20C.
2 is performed.

FIG. 6 shows an intermediate configuration in which the cooling pipe elements 23 of the side panel unit 20S and the ceiling panel unit 20C are connected to the refrigerant cooling and circulating device 30 in two paths. Refrigerant flow path 3 from two refrigerant recovery ends 27o to corresponding refrigerant supply ends 27i
1 includes, in order, a compressor 32 common to the two paths,
A condenser 33 and an evaporator assembly 34 are provided. The evaporator assembly 34 has a plurality (three in this example) of parallel flow paths 35 that connect the condenser 33 and the two refrigerant supply ends 27i in parallel, respectively. An evaporator 36 is provided. In the illustrated example, the evaporator 36 is formed of a capillary tube. However, in principle, the evaporator 36 may be formed of a throttle valve, a flow control valve, or the like.

As shown in FIG. 6, when the three parallel flow paths 35 are denoted by the symbol, the parallel flow path 35 is a normal flow path, the parallel flow path 35 is a load flow path, and a parallel flow path. Road 3
Reference numeral 5 denotes a starting channel. Parallel flow path 35 and parallel flow path 3
5 are provided with electromagnetic switching valves 37 and 38, respectively. In the refrigerant flow passage 31 between the condenser 33 and the evaporator assembly 34, an electromagnetic on-off valve 39 for the whole is provided.

The refrigerant flow path 31 from the refrigerant supply end 27i to the compressor 32 and the refrigerant flow path 31 from the condenser 33 to the evaporator assembly 34 pass through the heat exchanger 40. The heat exchanger 40 uses a relatively low-temperature refrigerant from the refrigerant supply end 27i to the compressor 32 to cool the condenser 33.
To cool the relatively high-temperature refrigerant from the compressor to the evaporator assembly 34 before entering the evaporator assembly 34 (in other words, by the relatively high-temperature refrigerant from the condenser 33 to the evaporator assembly 34, Refrigerant supply end 27i
(A function of temporarily heating a relatively low-temperature refrigerant from the compressor to the compressor 32 before entering the compressor 32).

After completion of assembly, the prefabricated freezer having the above configuration is operated, for example, as follows. At the start of operation, both the electromagnetic switching valves 37 and 38 are opened. That is, the refrigerant flows through all three parallel flow paths 35 in the evaporator assembly 34. In this operating state, the load on the compressor 32 can be reduced, and the inside of the freezing compartment 12 can be quickly cooled by the refrigerant having a sufficient flow rate. Freezer compartment 12
When the internal temperature reaches a predetermined temperature, the solenoid on-off valves 37, 3
8 is closed, and the inside of the freezing room 12 is cooled by the refrigerant flowing through one parallel flow path 35 (common flow path). The overall electromagnetic on-off valve 39 is closed when the operation of the refrigerant cooling and circulating device 30 is stopped.

On the other hand, when it is desired to temporarily increase the refrigerating capacity, such as when a new storage is put in the freezing compartment 12,
The electromagnetic on-off valve 37 is opened, and the refrigerant flows through the two parallel flow paths 35. With this operation, the refrigerating capacity can be temporarily increased, and when the temperature in the freezing compartment 12 reaches a predetermined value, the electromagnetic on-off valve 37 is closed to return to the normal operation. The on / off (open / close) of the electromagnetic on / off valves 37 and 38 can be automatically performed by the output of the temperature sensor. The heat exchanger 40 reduces the load on the compressor 32,
It is effective to obtain a lower evaporation temperature in the evaporator assembly 34.

In the prefabricated freezer described above, the freezing operation in the freezer compartment 12 is obtained by the cooling refrigerant flowing through the cooling pipe element 23 provided along the inner surfaces of the side panel unit 20S and the ceiling panel unit 20C, and requires air blowing. do not do. This is due to the structure in which the walls forming the closed space are almost cooling surfaces.

The above-described evaporator assembly 34 and heat exchanger 40 of the refrigerant cooling and circulating apparatus 30 can be applied without using a prefabricated freezer. That is, the evaporator assembly 34 and the heat exchanger 40 of the refrigerant cooling and circulating apparatus 30 can be applied regardless of how the cooling pipe element 23 is arranged in the freezer. Independent of the invention.

The present invention can be applied to a freezer and a refrigerator depending on the refrigerating capacity of the refrigerant by the refrigerant cooling and circulating device 30. In particular, when the present invention is applied to a freezer that can cool a refrigerant to about −50 ° C., a suitable freezer with very little frost is obtained.

[0025]

As described above, according to the present invention, a method of manufacturing a refrigerator and a prefabricated freezer having a good balance between productivity at a factory and ease of assembly at a site can be obtained. be able to. Further, the refrigerant cooling and circulating device of the present invention has a parallel flow path that connects the condenser and the refrigerant supply end in parallel, provides an evaporator in each of these parallel flow paths, and connects these parallel flow paths. Since it is selectively used according to the operation state of the refrigerator, efficient operation can be performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a prefabricated freezer according to the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is an exploded plan view showing an example of a ceiling panel unit and a side panel unit of a prefabricated freezer according to the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along the line VV of FIG. 3;

FIG. 6 is a connection diagram showing a connection system of a refrigerant cooling and circulating device of a prefabricated freezer according to the present invention.

[Explanation of symbols]

 Reference Signs List 11 foundation 12 freezer compartment 13 opening and closing door 20S side panel unit 20E doorway panel unit 20C ceiling panel unit 21 heat insulating plate 22 flat metal plate 23 cooling pipe element 23S linear portion 23T U-shaped folded portion 24 cooling plate 24U U-shaped cross section 24P Flat part 25 Side cover 27i Refrigerant supply end 27o Refrigerant recovery end 30 Refrigerant cooling and circulating device 31 Refrigerant flow path 32 Compressor 33 Condenser 34 Evaporator assembly 35 Parallel flow path 36 Evaporator 37 38 39 Electromagnetic on-off valve 40 Heat exchanger

Claims (10)

[Claims] A step of providing a series of cooling pipe elements having a refrigerant supply end and a recovery end along inner surfaces of at least three side panel units and at least one ceiling panel unit; Forming a unit; forming a closed space serving as a freezing and refrigeration room on a foundation by the at least three side panel units, one ceiling panel unit, and an entrance panel unit; cooling and circulating a refrigerant Providing a refrigerant cooling and circulating device; and, with the side panel unit and the ceiling panel unit installed on the foundation, the refrigerant supply end and the collection end of the cooling pipe element of the side panel unit and the ceiling panel unit;
Connecting to the refrigerant cooling and circulating device directly or via a refrigerant supply end and a recovery end of a cooling pipe element of another side panel unit or a ceiling panel unit;
A method for producing a refrigerator-freezer, comprising: 2. The method of manufacturing a refrigerator according to claim 1, wherein the step of connecting the refrigerant supply end and the recovery end of the cooling pipe element to the refrigerant cooling and circulating device includes cooling pipes of a plurality of side panel units and ceiling panel units. At least a part of the refrigerant supply end and the recovery end of the element are connected to each other, and the cooling pipe elements constitute a series of cooling pipe passages between a plurality of side panel units or between the side panel unit and the ceiling panel unit. Freezer refrigerator manufacturing method. 3. The method of manufacturing a refrigerator according to claim 1, wherein the step of providing a cooling pipe element on the side panel unit and the ceiling panel unit comprises:
Bringing a cooling pipe element bent so as to have a large number of straight portions parallel to each other via a U-shaped folded portion into close contact with a flat metal plate; Superimposing and fixing a heat sink having alternately U-shaped sections for receiving straight portions and flat portions along the flat metal plate; and fixing the flat metal plate having the cooling pipe element and the heat sink to the inner surface of the heat insulating plate. A method of manufacturing a refrigerator-freezer comprising: 4. At least three side panel units installed on a foundation to form a closed space, one entrance panel unit having an entrance, and at least one ceiling panel unit; A series of cooling pipe elements each having a refrigerant supply end and a recovery end are provided along the inner surface of the ceiling panel unit, respectively, in a unit state; cooling pipe elements of the side panel unit and the ceiling panel unit are provided. The refrigerant supply end and the recovery end are connected directly or through a refrigerant supply end and a recovery end of a cooling pipe element of another side panel unit or a ceiling panel unit to a refrigerant cooling circulation device that circulates the cooled refrigerant. Being;
A prefabricated refrigerator-freezer. 5. The prefabricated refrigerator-freezer according to claim 4, wherein at least a part of the refrigerant supply end and the recovery end of the cooling pipe element of the plurality of side panel units and the ceiling panel unit are connected to each other. A prefabricated refrigerator-freezer in which the cooling pipe elements constitute a series of cooling pipe passages between the side panel units or between the side panel unit and the ceiling panel unit. 6. The prefabricated refrigerator-freezer according to claim 4, wherein the side panel unit and the ceiling panel unit are respectively a heat insulating plate; a flat metal plate along the inner surface of the heat insulating plate; A cooling pipe element bent and formed so as to have a large number of straight portions parallel to each other through a portion, and a U-shaped cross section for receiving the parallel straight portion of the cooling pipe element; And a cooling plate having alternating flat portions along a flat metal plate. 7. The prefabricated refrigerator-freezer according to claim 4, wherein the refrigerant cooling and circulating device includes a compressor and a condenser between a refrigerant recovery end and a supply end of a cooling pipe element in order. The evaporator assembly includes a plurality of parallel flow paths that connect the condenser and the refrigerant supply end in parallel, and an evaporator provided in each of the parallel flow paths. A prefabricated refrigerator-freezer provided with an on-off valve for selectively using one or more of the parallel flow paths. 8. The prefabricated refrigerator-freezer according to claim 7, wherein the flow path from the refrigerant recovery end of the cooling pipe element to the compressor and the flow path from the condenser to the evaporator assembly are the refrigerant flowing through both flow paths. A prefabricated refrigerator that passes through the same heat exchanger that exchanges heat. 9. A refrigerant cooling and circulating apparatus for circulating a cooled refrigerant through a cooling pipe in a refrigerator, comprising: a cooling pipe;
A compressor, a condenser, and an evaporator assembly are provided, a plurality of parallel flow paths connecting the condenser and the refrigerant supply end in parallel to the evaporator assembly, and evaporators provided in the parallel flow paths, respectively. And a switching valve for selectively using one or more of the parallel flow paths is provided in the plurality of parallel flow paths. 10. The refrigerant cooling and circulating apparatus according to claim 9, wherein a flow path from the refrigerant recovery end of the cooling pipe to the compressor and a flow path from the condenser to the evaporator assembly are different from each other. A refrigerant cooling and circulating device that passes through the same heat exchanger that exchanges heat.