JPH0436573A - Low temperature refregerator - Google Patents

Abstract

PURPOSE:To obtain a low temperature refrigerator laid out in a machine chamber where each condensation unit located top and bottom is formed in the upper part of an upper case by providing the machine chamber which has an air intake port formed in the upper part of the upper case and an air exhaust port and a space where tapers off to a point from the front side to the rear side and communicates itself with the outside where a first condenser and a second condenser are laid out so that their respective air intake sides may face each other. CONSTITUTION:A machine chamber 40 formed in the upper part of an upper case or above an insulation box forms an air intake port 45 in the front and an air exhaust port 46 in the rear respectively. In this machine chamber 40, a first condenser 48 and a second condenser 52 are laid out so that their air intakes sides may face each other. Moreover, the machine chamber is provided with a space 55 which tapers off to a point from the rot side (or the side of a machine chamber cover 44) to the rear side (or the side of the air exhaust port 46) and is communicated with the outside by way of the air intake port 45.

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Application Field The present invention relates to a low-temperature refrigerator having an upper storage chamber and a lower storage chamber each cooled by an independent refrigeration cycle. Regarding the structure of the machine room.

Conventional technology An upper case forming a machine room in which a compressor, condenser, blower, etc. are installed above the insulation wall that defines the interior of the refrigerator, and a compressor, condenser, etc. located below the insulation wall that defines the interior of the refrigerator. The upper case is placed on top of the lower case, and the back of the upper case protrudes rearward from the back of the lower case. In a low-temperature showcase with an exhaust space formed directly below the rear, a passage whose upper end opens upwind of the blower in the upper case and whose lower end opens toward the exhaust space is installed on the back wall of the insulation wall of the upper case. As the one that was formed, the special public
There is a publication No. 9553.

Problems to be Solved by the Invention In the above publication, since a machine room is formed in each of the upper case and the lower case, when the height from the floor is constant, Because the machine room is located there, the internal volume of the showcase tends to be small, and the depth of the upper case is smaller than that of the lower case. , it is not possible to arrange the parts constituting the condensing unit in the front-rear direction by forming an intake port on the front and an exhaust port on the back, as shown in Figure 3 of the publication.
Intake and exhaust ports had to be formed on the left and right sides, and the parts constituting the condensing unit had to be arranged in the left-right direction. Further, due to space constraints, it is not possible to arrange the condensing units corresponding to both the upper and lower cases in a machine room formed at the upper part of the upper case.

Therefore, the present invention provides a low-temperature storage in which upper and lower condensing units are disposed in a machine room formed in the upper part of the upper case.

[Structure of the Invention] Means for Solving the Problems The low-temperature refrigerator of the present invention has a lower case having a front and back sliding transparent door on the upper surface and a lower storage chamber, and an upper case having a rotating transparent door on the front surface. an upper case having a storage chamber and disposed in the upper half of the lower case; a first compressor for cooling the upper storage chamber; an upper condensing unit consisting of a first condenser and a blower for the first condenser; It is equipped with a lower condensing unit consisting of a second compressor, a second condenser, and an air blower for the second condenser for cooling the storage room, and has an air inlet and an air outlet formed in the upper part of the upper case. The machine room is formed by arranging the first and second condensers such that their respective air suction sides face each other, and tapers from the front side to the back side, and is connected to the outside through the air intake port of the machine room. It is equipped with a space that communicates with the

In addition, in order to evaporate the water in the evaporating dish using the exhaust air from the machine room, a machine room is formed at the top of the upper case and has an air inlet on the front and an air outlet on the back, and a machine room is formed at the bottom of the lower case. an exhaust chamber that corresponds to the upper and lower condensing units, left and right rear ducts that extend from the machine room to the exhaust chamber and that are provided protruding from the back of the low-temperature refrigerator, respectively, corresponding to the upper and lower condensing units; A space that is arranged to face each other and tapers from the front side to the back side and communicates with the outside via an intake port, and an exhaust space that is formed between the left and right rear ducts and communicates with the exhaust chamber. 6. Provide a space.

Effect (1) The air suction sides of the condensers of the upper and lower condensing units face each other, and a space that tapers from the front side to the back side is formed in the machine room located at the top of the upper case. The air that has passed through is guided in a direction away from each other, and this space acts as an air flow path forming member that prevents the air that has passed from merging, and
When the condensing unit is viewed in the direction of wind flow, it acts to lengthen the arrangement distance of the parts constituting each condensing unit.

(2) Since the left and right rear ducts are provided to protrude backwards in correspondence with each condensing unit, each rear duct is
Not only does it act as a spacer to secure the exhaust space when the back of the low-temperature refrigerator is in contact with the wall, but by creating the space, the air that has passed through each condenser and is guided away from each other, They act as dedicated ducts leading from the machine room to the exhaust room independently of each other.

Example The present invention will be described in detail below based on the drawings.

Reference numeral 1 denotes a low-temperature refrigerator, which includes an upper case 4 consisting of an insulating box 3 with an opening 2 for storing and taking out products on the front;
A so-called dual-type low-temperature showcase will be described as an example in which the main body is constituted by an opening 5 for storing and taking out products on the upper surface and a lower case 7 constituted by a heat insulating box 6.

The upper case 4 is rotatably supported by a pair of upper and lower hinges, and has three pivotable transparent doors 11 with handles that open and close the opening 2 at the front of the insulation box 3. 3
A metal partition plate 12 and a bottom plate 13 are arranged at an appropriate distance from the inner surface of the refrigerator. As a result, the fluorescent lamp 1 as a lighting device is positioned vertically on the plurality of shelves 14 and the front part of the side wall.
5 and a plate-fin type evaporator 17.
A blower device 18 for the evaporator is installed, and a cold air passage 19 formed by the partition plate 12, the bottom plate 13, and the insulation box 3, and an air outlet 20 and an inlet 21 facing each other along the upper and lower edges of the inside of the opening 2 are installed. formed respectively.

By forcedly circulating the air (this is referred to as cold air) that has undergone heat exchange in the evaporator 17 using the blower 18, the cool air flows along the back surface of the transparent door 2 from the outlet 20 to the inlet 2. The storage chamber 16 is cooled by forming an air current or an air curtain.

The lower case 7 has a top wall 6A in the rear half of the opening 5 of the insulation box 6,
A front-rear sliding transparent door 31 which is disposed in the front half so as to be slidable in the front-rear direction with an inclined front part, and 3 of the opening 5 of the insulation box 6.
An inner box 33 is provided with a handrail 32 as a handrail portion made of metal such as stainless steel to decorate the sides, and serves as an inner wall of the heat insulating wall 6.
A pipe-on-sheet type evaporator 34 as a main cooler provided on the outer surface of the evaporator and a plate-fin type evaporator 35 as an auxiliary cooler provided below the ceiling wall 6A cause natural convection of heat exchanged cold air. This is to cool the inside of the freezer compartment 36.

Reference numeral 27 denotes a door storage section formed below the bottom wall 3E of the heat insulating box 3, which has a storage section cover 27B on the front part, stores the transparent door 31 of the lower case 7, and also provides a back space which will be described later. It communicates with the exhaust chamber 60 through the transparent door 31 to guide warm air to the surface of the transparent door 31. A fluorescent lamp 28 is disposed along the rear opening edge of the opening 5 of the insulation box 60 and serves as a lighting device for illuminating the interior of the lower case 7.

In addition, in the upper case 4, the front end of the bottom wall of the insulation box 3 is connected to the lower case 7.
The rear end of the bottom wall protrudes rearward from the back wall of the heat insulating box 6 of the lower case 7 so that a rear space can be formed behind the back wall of the lower case 7. , both the insulation boxes 3 and 6 are configured to communicate with each other through their left and right side walls.

40 is a TC machine room formed in the upper part of the upper case 4, that is, above the insulation box 3, and includes a top plate 41, left and right side plates 42.
43 and a machine room cover 44 which also serves as an intake grill, and an intake port 45. Air exhaust 8046 is formed on the back surface. The machine room 40 also includes an upper condensing unit U1 that includes a first compressor 47, a first condenser 48, and a first condenser blower 49, which together with the plate fin type evaporator 17 of the upper case 4 constitute a refrigeration cycle. , a second compressor 51 constituting a refrigeration cycle together with the main and auxiliary coolers 34 and 35 of the lower case 7, a lower condensing unit U2 consisting of a second condenser 52, and a second condenser blower 53.
and are installed respectively.

Inside this machine room 40, there is a blower device 4 for the first and second condensers.
In this embodiment, the upper condensing unit U1 is located in the right half of the machine room, and the lower condensing unit U2 is located in the right half of the machine room. It shall be placed in the left half of the room.

55 is formed by arranging a first condenser 48 and a second condenser 52 such that their respective air suction sides face each other,
In this embodiment, the air intake space is tapered from the front side (i.e. machine room cover side) to the back side (i.e. air outlet side) and communicates with the outside via the air intake port 45. Both condensers are connected at the tips of their tube plates so that each air suction side forms a figure 7 shape.

56 and 57 are partition plates that prevent the air that has passed through the first and second condensers 48 and 52 from being guided again to the air suction side of each condenser. Between the condensing unit) Ul, U2 and the machine room cover 44,
A space is secured for arranging an operating section 58 provided with a power switch, a fluorescent light switch, etc., and other electrical components such as an electrical equipment box 59. The operation unit 5 placed in this space
8 and the electrical equipment box 59 are cooled by the outside air taken into the machine room by the operation of the air blowers 49 and 53 for both condensers.

In addition, since the intake space 55 is formed, a work space is secured in front of each condenser 48, 52 when inspecting and servicing the machine room 40. It can be used as a temporary storage area when the box 59 is removed, making it easier to perform maintenance work in the machine room.

60 is an exhaust chamber formed in the lower part of the lower case 7;
Fluorescent lamp ballast 61, evaporation plate 62, and evaporation promoting member 6
3rd class is arranged.

71 and 72 are upper and lower condensing units Ul, U, respectively.
2, the left and right rear ducts are provided to protrude from the back of the low temperature refrigerator 1 and extend from the machine room 40 to the exhaust chamber 60. The ducts 71 and 72 are spaced apart from each other, and each duct 71 and 72 is configured to independently guide air introduced from the intake port 45 and passed through each condensing unit from the machine room 40 to the exhaust chamber 60. Each rear duct 71 and 72 has a plurality of exhaust holes 71B at appropriate locations on the opposing surfaces.
and 72B.

In addition, 73 is a cover attached to form a back space 74 at the back of the heat insulating box 6 so as to cover more than half of the opening of the exhaust space 75 formed between the spaced apart back ducts 71 and 72.

[Effects of the Invention] As detailed above, the low temperature refrigerator of the present invention provides the following effects.

■By forming a space, the air that has passed through each condenser is guided away from each other, and this space acts as a flow path forming member that prevents the passing air from merging. When viewed from the outside, the machine room has a depth smaller than that of the lower case due to the effect of lengthening the arrangement distance of the parts constituting each condensing unit. Each condensing unit can be arranged.

In addition, since the machine room, which was conventionally formed at the bottom of the lower case, is placed only at the top of the upper case, it is possible to reduce the height from the floor of the lower case to the transparent door. It becomes easier for children to check the displayed products, and the product display effect as a low-temperature refrigerator is improved.

■Since the left and right rear ducts are provided to correspond to each cooling unit and protrude backwards, each rear duct must ensure a space for exhaust when the back of the low-temperature refrigerator is in contact with the wall. At the same time, the air (warm air) that has passed through each condenser and is directed away from each other is guided independently from the machine room to the exhaust chamber, and the water in the evaporating dish that will be installed in the exhaust chamber is It can be used to evaporate.

[Brief explanation of the drawing]

Each figure shows an embodiment of the low-temperature refrigerator of the present invention, and FIG.
A-A sectional view in the figure, Figures 2 and 3 are front perspective views and rear perspective views, Figure 4 is a perspective view of the machine room, and Figure 5 is a state where the top plate of the machine room is partially cut away. FIG. 6 is a partially cutaway perspective view of the exhaust chamber. 1. Low temperature storage, 4. Upper case, 7. Lower case.
Ul upper condensing unit, U2-lower condensing unit, 4
0 Machine room, 45-・Intake port, 46-Air exhaust pressure port,
47-・First compressor, 48・First condenser, 49・
First condenser blower, 51...second compressor, 52
...Second condenser, 53 Second condenser blower, 55
・Space, 60 exhaust chamber, 71.72・back duct,
75...Exhaust space.

Claims (1)

[Scope of Claims] 1. A lower case having a front and rear sliding transparent door on the top surface and a lower storage chamber, and a rear upper part of the lower case having a rotating transparent door on the front surface and an upper storage chamber. and a first compressor for cooling the upper storage chamber.
An upper condensing unit consisting of a first condenser and a blower for the first condenser, and a lower condensing unit consisting of a second compressor, a second condenser and a blower for the second condenser for cooling the lower storage chamber. A machine room formed in the upper part of the upper case and having an air intake port on the front side and an air outlet port on the back side, and the first and second condensers are arranged so that their respective air intake sides face each other. What is claimed is: 1. A low-temperature refrigerator comprising: a space that is formed as shown in FIG. 2. A lower case with a front-rear sliding transparent door on the top surface and a lower storage chamber, and an upper part with a rotating transparent door on the front surface and an upper storage chamber, which is disposed in the upper half of the lower case. a first compressor for cooling the case and the upper storage chamber;
An upper condensing unit consisting of a first condenser and a blower for the first condenser, and a lower condensing unit consisting of a second compressor, a second condenser and a blower for the second condenser for cooling the lower storage chamber. In the low-temperature refrigerator equipped with the above-mentioned, Correspondingly, left and right rear ducts are provided to protrude from the back of the low temperature refrigerator and extend from the machine room to the exhaust chamber, and the first and second condensers are arranged so that their respective air suction sides face each other. a space that tapers from the front side toward the back side and communicates with the outside via the intake port; and an exhaust space that is formed between the left and right rear ducts and communicates with the exhaust chamber. A low-temperature refrigerator.