JPH0784975B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a low temperature refrigerator having an upper storage chamber and a lower storage chamber, each of which is cooled in an independent refrigeration cycle. Regarding the structure of the machine room.

Conventional technology An upper case that forms a machine room for installing a compressor, condenser, blower, etc. above the heat insulation wall that defines the interior of the warehouse, and a compressor / condenser below the heat insulation wall that defines the interior of the interior Etc., and a lower case that forms a machine room with an exhaust passage on the back side.The upper case is placed on this lower case and the back side of the upper case projects rearward from the back side of the lower case. In a low temperature showcase with an arrangement space formed immediately below the rear part, a passage whose upper end opens to the windward side of the blower in the upper case and whose lower end opens to the exhaust space side is defined by the back wall of the heat insulating wall of the upper case. As the one formed in
There is No. 3 bulletin.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above publication, because the machine room is formed in each of the upper case and the lower case, when the height from the floor surface is constant, the upper case and the lower case respectively have Since the machine room is located, the internal volume of the showcase tends to be small. Moreover, since the upper case has a smaller depth than the lower case, it is possible to form a condensing unit by forming an intake port on the front and an exhaust port on the back, as in the case of a machine room formed in the lower part of the lower case. Since the constituent parts cannot be arranged in the front-rear direction, as shown in FIG.
It was necessary to form intake and exhaust ports on the left and right side surfaces, respectively, and arrange the components constituting the condensing unit in the left-right direction. Further, it has not been done in terms of space to dispose each condensing unit corresponding to both upper and lower cases in a machine room formed in the upper part of the upper case.

In view of this, the present invention provides a low temperature warehouse in which the upper and lower condensing units are arranged in a machine room formed in the upper part of the upper case.

[Means for Solving the Problems] A low temperature refrigerator according to the present invention includes a lower case having a lower storage chamber provided with a front and rear sliding transparent door on an upper surface and an upper portion provided with a rotating transparent door on a front surface. An upper case that has a storage chamber and is disposed in the upper half of the lower half of the lower case; and an upper condensing unit that includes a first compressor / first condenser and a first condenser blower for cooling the upper storage chamber, A lower condenser unit comprising a second compressor / second condenser and a second condenser blower for cooling the lower storage chamber, which is formed in the upper part of the upper case and has an intake port and an air exhaust unit. A machine room having an outlet and first and second condensers are formed such that their respective air intake sides face each other, and are tapered from the front side toward the back side and through an intake port of the machine room. Those with a space that communicates with the outside A.

Also, in order to evaporate the water in the evaporating dish using the exhaust of the machine room, the machine room is formed in the upper part of the upper case and has the intake port on the front and the air exhaust port on the back, and the lower part of the lower case. Exhaust chambers, left and right rear ducts projecting from the machine chamber to the exhaust chambers corresponding to the upper and lower condensing units, respectively, and the first and second condensers for sucking in the respective air Exhaust formed between the left and right rear ducts and a space that is formed so that the sides face each other and that tapers from the front side to the rear side and that communicates with the outside through the intake port A space for use may be provided.

Action (1) Since the air suction sides of the condensers of the upper and lower condenser units face each other and taper from the front side to the rear side in the machine room located in the upper part of the upper case, the condensers are connected. The air that has passed through is guided in a direction away from each other, and acts as an air flow path forming member that suppresses the merging of the air that has passed through this space, and
When the condensing unit is viewed in the flow direction of the wind, it acts so as to lengthen the arrangement distance of the components constituting each condensing unit.

(2) Since the left and right rear ducts are provided so as to project backwards corresponding to the respective condensation units, each rear duct is
Not only does it act as a spacer that secures an exhaust space when the rear surface of the low-temperature cabinet is brought into contact with the wall surface, but the formation of the space allows the air that has passed through the respective condensers and is led away from each other, Acts as dedicated ducts that lead from the machine room to the exhaust chamber independently of each other.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

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

The upper case 4 is provided with three rotatable transparent doors 11 with a handle, which are pivotally supported by a pair of upper and lower hinges and rotatably closed the opening 2 in the front of the heat insulating box 3, 3 Partition plate 12 and bottom plate 13 made of metal with an appropriate distance from the inner surface of the cabinet
Are installed. Thereby, a plurality of shelves 14 and a storage chamber 16 provided with a fluorescent lamp 15 as a lighting device vertically positioned on the front part of the side wall, a plate fin type evaporator 17 and an air blower device 18 for the evaporator are installed and the partition plate 12 is installed. Further, a cold air passage 19 formed by the bottom plate 13 and the heat insulating box 3, and a blower outlet 20 and a suction inlet 2 which are opposed to each other are formed along both upper and lower inner edges of the opening 2.

Then, the air that has been heat-exchanged in the evaporator 17 (this is referred to as cold air) is forcedly circulated by the blower device 18, so that the cool airflow that flows along the back surface of the transparent door 2 from the air outlet 20 toward the air inlet 21. That is, by forming an air curtain,
16 is to be cooled.

The lower case 7 includes a ceiling wall 6A in the rear half of the opening 5 of the heat insulating box 6, a front-rear sliding transparent door 31 slanted downward in the front half and slidable in the front-rear direction, and the heat insulating box 6 Pipe-on-sheet type as a main cooler provided on the outer surface of the inner box 33 which is the inner wall of the heat insulating wall 6 and is provided with a hand rail 32 made of metal such as stainless steel that decorates the three sides of the opening 5 of Evaporator
The inside of the freezer compartment 36 is cooled by allowing natural convection of the cool air that has been heat-exchanged by the 34 and the plate fin type evaporator 35 as an auxiliary cooler provided below the ceiling wall 6A.

Reference numeral 27 denotes a door storage portion formed below the bottom wall 3E of the heat insulating box 3, and has a storage portion cover 27B at the front thereof, and the lower case 7
The transparent door 31 is housed and communicated with the exhaust chamber 60 through a back space described later to guide warm air to the surface of the transparent door 31. Reference numeral 28 denotes a fluorescent lamp which is arranged along the rear opening edge of the opening 5 of the heat insulating box 6 and serves as a lighting device for internal lighting in the lower case 7.

In the upper case 4, the front end of the bottom wall of the heat insulating box 3 is the lower case 7.
The rear end of the bottom wall projects 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 at approximately the center of the upper surface of The left and right side walls are configured so that the heat insulating boxes 3 and 6 communicate with each other.

Reference numeral 40 denotes a machine room formed above the upper case 4, that is, above the heat insulating box 3. The machine room 40 has a top plate 41, left and right side plates 42, 43, and a machine room cover 44 that also serves as a suction grill, and has an intake port 4 on the front surface.
5. Air outlets 46 are formed on the back surface, respectively. Also,
In this machine room 40, the first compressor 47, which constitutes a refrigeration cycle together with the plate fin type evaporator 17 of the upper case 4,
An upper condensing unit U1 including a first condenser 48 and a first condenser blower 49, and both main and auxiliary coolers 34, 3 of the lower case 7.
5, and a lower condensing unit U2 including a second compressor 51, a second condenser 52, and a second condenser blower 53, which constitute a refrigeration cycle, is installed.

The inside of the machine room 40 has first and second fan covers 50 corresponding to the first and second condenser blowers 49 and 53, respectively.
And 54 are divided into left and right, and in this embodiment,
Place the upper condensing unit U1 in the right half of the machine room and the lower condensing unit.
U2 shall be installed in the left half of the machine room.

55 is formed by arranging the first condenser 48 and the second condenser 52 so that their respective air suction sides face each other, and from the front side (that is, the machine room cover side) to the back side (that is, the air outlet side). Is an intake space that tapers toward and communicates with the outside through an intake port 45. In this embodiment, both condensers are connected at the tip of the tube plate of both condensers so that the air suction sides of both condensers are V-shaped.

Reference numerals 56 and 57 denote partition plates that prevent the air that has passed through the first and second condensers 48 and 52 from being guided to the air intake side of each condenser again. Between the condensing units U1 and U2 and the machine room cover 44, a space for arranging an operation unit 58 provided with a power switch, a fluorescent light switch, and the like, and other electrical components such as an electrical equipment box 59 is secured. And
The operation unit 58 and the electrical equipment box 59 arranged in this space are cooled by the outside air taken into the machine room by the operation of the air blowers 49 and 53 for both condensers.

Further, since the air intake space 55 is formed, a working space is secured in front of the condensers 48, 52 when the machine room 40 is inspected and maintained, and the operation section 58 as well as the inspection and maintenance of each condenser are performed.
It can be used as a temporary storage space when the electrical equipment box 59 is removed, and maintenance work in the machine room can be easily performed.

Reference numeral 60 is an exhaust chamber formed in the lower part of the lower case 7, and is provided with a fluorescent lamp ballast 61, an evaporation tray 62, an evaporation promoting member 63, and the like.

Reference numerals 71 and 72 are left and right rear ducts that are provided to project to the back of the low temperature refrigerator 1 corresponding to the upper and lower condensing units U1 and U2, respectively, and extend from the machine room 40 to the exhaust chamber 60. Each duct
71 and 72 are arranged so as to be separated from each other so that the air introduced from the intake port 45 and passing through each condensing unit is independently guided from the machine chamber 40 to the exhaust chamber 60. A plurality of exhaust holes 71B and 72B are formed at appropriate positions on the opposite surfaces of the rear ducts 71 and 72, respectively.

Reference numeral 73 is a cover attached so as to form a rear space 74 behind the heat insulating box 6 so as to cover more than half of the opening of the exhaust space 75 formed between the separated rear ducts 71 and 72.

[Effects of the Invention] As described in detail above, the low temperature refrigerator of the present invention has the following effects.

Due to the formation of the space, the air that has passed through each condenser is guided in a direction away from each other, and this space acts as a flow path forming member that suppresses the confluence of the passing air, and the condensation unit is viewed in the wind flow direction. At this time, due to the fact that it acts to lengthen the arrangement distance of the components that make up each condensing unit, the depth dimension is smaller than the depth dimension of the lower case without increasing the depth dimension. A condensing unit can be arranged. In addition, since the machine room that was previously formed in the lower part of the lower case was placed only in the upper part of the upper case, the height from the floor of the lower case to the transparent door can be reduced, and children with small heights can be made smaller. This makes it easier for them to see the products on display and improves the product display effect as a low-temperature storage.

Since the left and right rear ducts are provided so as to project backwards corresponding to each cooling unit, it is possible to secure an exhaust space for each rear duct when the rear surface of the cold storage is brought into contact with the wall surface. At the same time, the air (warm air) that has passed through each condenser and is directed in the direction away from each other is independently guided from the machine room to the exhaust chamber, and the water in the evaporating dish to be installed in the exhaust chamber is removed. It can be used for evaporation.

[Brief description of drawings]

Each drawing shows an embodiment of a low temperature refrigerator of the present invention, and FIG.
Sectional view taken along the line A-A of FIG. 2, FIGS. 2 and 3 are front perspective views and rear perspective views, FIG. 4 is a perspective view of a machine room, and FIG. 5 is a state in which a 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 chamber, 4 ... Upper case, 7 ... Lower case,
U1 …… Upper condensing unit, U2 …… Lower condensing unit, 40 ……
Machine room, 45 ... Intake port, 46 ... Air exhaust port, 47 ... No. 1
Compressor, 48 ... First condenser, 49 ... Blower for first condenser, 51 ... Second compressor, 52 ... Second condenser, 53 ... Second
Blower for condenser, 55 ... space, 60 ... exhaust chamber, 71, 72
…… Back duct, 75 …… Exhaust space.

Claims (2)

[Claims] 1. A lower case having a lower storage chamber with a front and rear sliding type transparent door on the upper surface, and an upper storage chamber having a rotating type transparent door on the front surface and arranged in the upper half of the lower case. And a first case for cooling the upper storage chamber
An upper condensing unit including a compressor, a first condenser, and a blower for the first condenser, and a lower condensing unit including a second compressor, a second condenser, and a blower for the second condenser for cooling the lower storage chamber. In a low-temperature warehouse provided with a unit, a machine room formed at an upper part of the upper case and having an intake port on a front surface and an air exhaust port on a rear surface, and the air suction sides of the first and second condensers face each other. A low-temperature warehouse, which is formed and arranged as described above, is tapered from the front side toward the back side, and has a space communicating with the outside through the intake port. 2. A lower case having a lower storage chamber with a front-rear sliding transparent door on the upper surface, and an upper storage chamber having a rotating transparent door on the front surface, which is disposed in the upper half of the lower case. And a first case for cooling the upper storage chamber
An upper condensing unit including a compressor, a first condenser, and a blower for the first condenser, and a lower condensing unit including a second compressor, a second condenser, and a blower for the second condenser for cooling the lower storage chamber. In a low-temperature warehouse equipped with a unit, a machine room formed in an upper part of the upper case and having an intake port on a front surface and an air exhaust port on a rear surface, an exhaust chamber formed in a lower part of the lower case, and the upper and lower parts. The left and right rear ducts, which are provided so as to project to the back of the body temperature chamber and correspond to the condensing unit, and extend from the machine chamber to the exhaust chamber, and the first and second condensers are arranged so that their respective air intake sides face each other. A space that is formed between the front and rear surfaces and that communicates with the outside through the intake port, and an exhaust space that is formed between the left and right rear ducts and that communicates with the exhaust chamber. A low-temperature container which is equipped with a door.