JPH0331681A - Low-temperature case - Google Patents

Abstract

PURPOSE:To contrive a favorable discharge of a gas in a low-temperature case and promote the evaporation of drain by a method wherein a machine room is divided substantially into at least two parts of a condensing unit and a draining unit by a partitioning plate. CONSTITUTION:A machine room 40 is divided by a partitioning plate 83 into at least two parts of a condensing unit 51 and a draining unit 53 substantially. One part of hot air, passing through the condensing unit 51 during the operation of both ventilating devices 45, 48, can be guided into the draining unit 53 from the back side of a case whereby air stream from the back side toward the front side of the case can be formed in the draining unit 53 and reserved water in an evaporating pan 81 can be heated by the air stream to promote the evaporation of drain. Upon defrosting, in which either one of the compressor 46, 49 is stopped and a water level in the evaporating pan 81 is elevated, both of the ventilating devices 45, 48 are operated whereby warm-air stream, which passed through the condensing unit 51, is introduced into the draining part 53 to increase the forced evaporating effect of frost in the evaporating pan 81 utilizing the warm-air stream.

Description

[Detailed description of the invention] [Object of the invention 1 Industrial applications TECHNICAL FIELD The present invention relates to improvement of a machine room of a cold storage.

6. Prior Art 6. Japanese Utility Model Publication No. 60-9664 and ■ Utility Model Application Publication No. 61-1
There is a publication No. 42674.

In the technology (2) mentioned above, the refrigerant compressor, condenser, and blower that form the refrigeration cycle are arranged in a machine room with an opening on either the front or the back, and are arranged almost in a line with a gap between them. A device is disclosed in which the device is placed in front of the blower and is covered with a filter placed vertically so that the suction surface faces the side wall of the machine room with a gap between them. On the other hand, in the technology (2), two or more condensers and a blower fan are arranged surrounding all or part of the other functional parts other than the condenser constituting the refrigeration cycle, and the condenser is placed in the air path of the blower fan. and one in which functional parts are arranged is disclosed.

Problems to be Solved by the Invention In the technique (2) above, since the machine room has an intake port and an exhaust port on one side, the opening width of the machine room must be made large. The problem was that large blowers had to be used to circulate the air.

In addition, with the technique (■), it is difficult to apply air to the entire condenser, and it is impossible to evaporate wastewater by applying the air that has passed through the condenser to an evaporating dish or drain pipe due to its configuration. there were. Furthermore, in order to accommodate the so-called dual type that has two mutually independent refrigeration cycles in both technologies and 6, it is necessary to perform partial intake and exhaust as a machine room due to the constraints of its height and width. In addition, the structure was not designed to promote evaporation of wastewater.

Therefore, an object of the present invention is to provide a low-temperature refrigerator having two mutually independent refrigeration cycles, which has a machine room configured to improve exhaust air and promote evaporation of waste water.

[Structure 1 of the Invention Means for Solving the Problems The present invention provides a low-temperature storage by providing two storage compartments each having an independent evaporator at the bottom and forming a machine compartment at the bottom. The machine room is divided into at least 6 sections (left and right), and one section has a compressor/condenser corresponding to each evaporator, and a first and second condenser air blower.
The condensing unit is equipped with a condensing unit and each condenser and blower are arranged side by side in the horizontal direction, and the other compartment is equipped with a drain pipe for leading out the waste water from each storage room and one end of this drain pipe. An evaporation plate facing the water is installed as a drainage part, and on the windward side of the double-layer detector there is an air intake that faces the condenser and an air exhaust that faces the drainage part and is separated from the air intake by a partition plate. An outlet is provided so that when either one of the compressors is in operation, both blowers are operated, and when both compressors are stopped, both blowers are stopped.

By roughly dividing the machine room into at least two parts, the condensing unit section and the drainage section, using the functional partition plate, and also reliably partitioning the air intake port and the air discharge port,
The arrangement of parts and air intake and exhaust in the machine room are done efficiently. In addition, the air taken in from the air intake on the windward side of the condenser and warmed by passing through the condensing unit is guided from the back of the drainage part and discharged from the air outlet in front. When the air blower in the condensing unit is operating, an airflow is formed in the drainage section from the back to the front, and this airflow warms the wastewater stored in the evaporation pan and promotes evaporation of the wastewater. I have to.

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 to 5.

1 is an upper case 4 made up of a heat insulating wall 3 with an opening 2 for storing and taking out products on the front surface, and a lower part made up of a heat insulating wall 6 with an opening 5 for storing and taking out products on the top surface. This is a so-called dual-type low-temperature refrigerator whose main body is constituted by a case 7.

The upper case 4 is rotatably supported by a pair of upper and lower hinges, and has two transparent doors with handles 11A that can open and close the opening 2! A metal compartment plate 12 and a bottom plate 13 are provided at an appropriate distance from the inner surface of the insulating wall 3, and a plurality of shelves 14 and a fluorescent lamp are provided as a lighting device! 5 (in this example, used for freezing to be maintained at a temperature below 0°C) + 6, and a plate fin type cooler 17 equipped with a defrosting heater H at the bottom that is energized during defrosting.
A blower device 18 is installed to form a cold air passage 19 formed by the partition plate 12, the bottom plate 13, and the heat insulating wall 3, and an air outlet 20 and an inlet 21 facing each other along both upper and lower inner edges of the opening 2. ing.

The air (this is referred to as cold air) that has undergone heat exchange in the cooler 17 is forcedly circulated by the blower 18 as shown by the thick arrow, so that the air is forced to circulate along the back surface of the transparent door 11 from the outlet 20 to the inlet 21. This forms an air curtain of flowing cold air, thereby cooling the storage chamber 16.

Reference numeral 25 denotes a door storage section formed below the bottom wall 3E of the heat insulating wall 3 and serving also as a lighting room, and is provided with a fluorescent lamp 26 as a lighting device for illuminating the interior of the lower case 7 at its front part, which will be described later. The transparent door 30 of the lower case is stored. At the rear of the door storage section 25, there is a discharge pipe 27 which is disposed through the bottom wall 3E so as to conduct drainage such as defrosting water from the plate fin type cooler 17 of the upper case 4 to the lower part of the upper case. The lower part protrudes, and the outlet pipe 27 is connected to the evaporating dish 8 of the machine room 40 through a space 29 formed behind the back wall of the heat insulating wall 6.
A first drain pipe 28 extending to 1 is connected.

The lower case 7 has a top wall 6A in the rear half of the opening 5 of the heat insulating wall 6,
A transparent door 30 as two sliding doors on the left and right, which are arranged in the front half so that they can be slid in the front and back directions with the front end inclined, and a heat insulating wall 6
A handrail 31 is provided as a handrail part made of metal such as stainless steel to decorate the front, left and right sides of the opening 5, and the main cooler is provided on the outer surface of the inner box 32 which is the inner wall of the heat insulating wall 6. The inside of the freezer compartment 35 is cooled by natural convection of cold air heat exchanged between the pipe-on-sheet type cooler 33 and the roll-bond type cooler 34 as an auxiliary cooler provided at the lower part of the ceiling wall 6A. . A second drain pipe 36 is disposed in the lower case 7 to collect dew from the transparent door 30 and guide it to the drain section 53 of the machine room 40 (see FIG. 4).

The upper case 4 is configured such that the front end of the bottom wall 3E of the heat insulating wall 3 is located approximately at the center of the upper surface of the lower case 7, and the rear end of the bottom wall 3E protrudes rearward from the back wall of the heat insulating wall 6 of the lower case 7. At the same time, the side walls are configured so that the insulating walls communicate with each other.

40 is a machine room formed in the lower part of the low temperature storage l, that is, below the heat insulating wall 6, and is fixed to the heat insulating wall 6 at part of four corners on the base body 64, which consists of a unit base 61 and left and right bases 62, 63. The supporting columns 65 to 68 are arranged respectively, and mechanical parts are placed on the remaining parts. In addition, the machine room 40 has an opening in the front and an air outlet 42 in the back, a condensing unit 51 is located in the center behind the opening, a wiring part 52 is on the left side of the opening, and a drainage part 53 is on the right side of the opening. It is arranged in sections. In addition, the base body, strictly speaking, each left and right base 62, 63) 64 has a front cover 54.
is arranged so that it can be opened and closed freely by a hinge 55, leaving the upper part of the opening (see FIG. 3, 41), and the fixing magnet 56 of the front cover 54 is brought into contact with the pillars 65 and 68.

The condensing unit section 51 includes a first condenser 44 that constitutes a first refrigeration cycle together with the cooler 17 of the upper case 4.
A first condensing unit (51A) in which a first air blower 45 and a first compressor 46 are arranged in order, and a main/auxiliary air cooler 33,34 of the lower case 7 constitute a second refrigeration cycle. A second condensing unit 51B in which a second condenser 47, a second blower 48, and a second compressor 49 are arranged in order in the front and back are combined into a double layer condenser 44, 47 and a second blower 4.
5.48 are arranged side by side,
The casing 50 of the blower 45.48 has a double-layer detector 44.
It is composed of one member so as to cover the rear of 47.

The blowers 45 and 48 stop operating when both the compressors 46 and 49 stop at and 6, for example when both storage chambers 16 and 35 are cooled to respective set temperatures. That is, when one of the refrigeration cycles is stopped, for example, during defrosting when the refrigerant supply to the cooler 17 of the upper case 4 is interrupted and the defrosting heater H is energized, the frost in the cooler is removed by the heater H. It is melted and becomes dew [passing through the wood pipe 28 and being guided to the evaporating dish 81
However, as mentioned above (both blowers 45.4)
8 is to continue operation, so two compressors 4
In addition to being able to secure the same amount of air as when the condenser unit 6.49 is in operation, continuous cooling of both condensers 44 and 47 can be achieved, and the condensing unit) 51
It is possible to prevent a short cycle of air inside the tank.

The wiring section 52 is for arranging an electrical box 71 and wiring 72 extending from the electrical box 71 to house electrical components.
The condensing unit section 51 is partitioned left and right by a wiring partition plate 73 except for the rear portion.

The drain section 53 includes an evaporating tray 81 that is arranged to straddle between the front and rear columns 67 and 68 and has an opening on the top surface facing one end of the first and second drain pipes 28, 36, and an evaporating tray 81 located directly below the evaporating tray 81. It is equipped with a drainage tank 82 that stores drainage from the dish, and each drainage pipe 28, 36, evaporation dish 81, and drainage tank 8.
2 constitutes a drainage system. Further, the drainage section 53 is partitioned into left and right sections in front of the casing 50 by a drainage partition plate 83, so that a portion of the warm air from the condensing unit section 51 can flow into the drainage section 53. A communication pipe 84 connected to the second drain pipe 36 located further to the left passes through the wiring section 52 and the rear of the condensing unit 51 and reaches the evaporating dish 81 while forming a U-trap. Note that this communication pipe 84 is fixed to a unit guide 85 that extends in the width direction of the air outlet 420.
This prevents the unit guard 85 and the wiring 72 from coming into contact with each other.

Further, the upper part 41 of the opening is connected to a wiring partition plate 73 and a drainage partition plate 8.
3, an air intake port 41A facing the leeward side of the one-car condenser 44, 47, an air discharge port 41B located in front of the drainage part 53, and an exhaust port 4 located in front of the wiring part 52.
It is divided into 1C and 1C.

Then, it is taken into the condensing unit) 51 and both condensers 44.4
The air that has been heat exchanged and heated by 7 (it has a temperature of around 40°C and is called warm air) is discharged to the outside of the machine room 40 from the air outlet 42 (see the solid line arrow in Fig. 3). The flow is divided into two types: one that hits the lower part of the rear cover 43 or the wall of the installation part, changes direction, and is led to the door storage part 25 through the space 29 (see the dotted chain arrow in FIG. 3). Also, while the above-mentioned blowers 45 and 48 are in operation, a part of the warm air passing through the condensing unit 5 can be guided from the back to the drainage section 53 (as shown by the broken line arrow in Figure 1). An air flow directed from the back to the front can be formed in the drainage portion 53, and this air flow warms the water stored in the evaporation tray 81 to promote evaporation of the waste water.

〔Effect of the invention〕

As described in detail above, according to the present invention, the machine room is roughly divided into at least two parts, the condensing unit section and the drainage section, using a partition plate, thereby controlling the arrangement of parts and intake and exhaust in the machine room. I try to do it efficiently. In addition, by making it possible to introduce some of the air that has been sucked in from the air intakes on the windward side of both condensers and warmed by passing through the condensing unit section to the drainage section from the back, it is possible to During operation, an airflow can be formed in the drainage section from the back to the front, and this airflow can warm the wastewater stored in the evaporating dish and promote the evaporation of the wastewater. Moreover, even during defrosting, when one of the compressors stops and the water level in the evaporating tray increases, both blowers continue to operate, so the warm air that has passed through the condensing unit is guided to the drainage section. By using the airflow, the forced evaporation effect of the dew on the evaporating dish can be further enhanced, and as a result, it becomes possible to use an evaporating dish with a small volume.

[Brief explanation of drawings]

Each figure shows one embodiment of the present invention, and FIG. 1 is a partially omitted perspective view schematically showing the machine room, FIG. 2 is a front view of the low-temperature refrigerator, and FIG.
The figure is a longitudinal cross-sectional view of the low-temperature storage, Figure 4 is a side view schematically showing the path through which defrosting water and dew are conveyed from the upper and lower cases to the machine room, and Figure 5 is a plan view of the machine room. . l...Low temperature storage, 4...Upper case, 7...Lower case, 28.38...Drain pipe, 4o...Machine room 4
1A...Air intake, 41B, 42 Air outlet, 4
4.47... Condenser, 45.48... Condenser blower, 46.49... Compressor, 51... Condensing unit section, 53... Drainage section, 73... Wiring partition board , 81...Evaporation dish, 83...Drainage partition plate.

Claims (1)

[Claims] 1. In a low-temperature warehouse with two storage compartments each having an independent evaporator in the upper part and a machine room in the lower part, the machine room is divided into at least two left and right parts, and one compartment has each evaporator. A first and a second condensing unit consisting of a compressor, a condenser, and a condenser blower device corresponding to The compartment is provided with a drain pipe for leading out the waste water from each of the storage rooms and an evaporation plate facing one end of the drain pipe to form a drainage section, and a drain pipe is provided on the windward side of both the condensers facing the condenser. An air outlet is disposed facing the air intake and the drainage part and separated from the air intake by a partition plate, and when either one of the compressors is operated, both blowers are operated, A low-temperature refrigerator characterized in that both of the blowers are stopped when both of the compressors are stopped.