JPH0519068B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Field of Application The present invention relates to a separate type show case, and more specifically, to an improvement of a machine box in which mechanical parts are housed.

Conventional technology Conventionally, in this type of low-temperature case, there are two cooling methods: one using natural convection and the other using forced circulation. In the latter method, air is blown from one side of the evaporator (=cooler). This cooled air is cooled and guided from the opposite side to a cold air outlet to cool the inside of the case. An example of this is disclosed in Japanese Utility Model Publication No. 56-39988.
In this publication, air is introduced through an intake port at the bottom of a low temperature chamber, cooled by an evaporator, and cold air is sent out from an outlet at the top of the low temperature chamber to cool the inside of the low temperature chamber.

Problems to be Solved by the Invention In the above-mentioned conventional technology, air is sent from one side of the evaporator and cooled air (=cold air) is sent from the other side because the machine room is located at the bottom of the cold room.
The system uses a method that sends out and guides it to the upper part of the cold room. In other words, since the air intake and air intake are on different sides, arranging the cold air outlet and circulating cold air intake on the same side not only requires a duct, but also requires a space to accommodate this duct. Therefore, there was a problem that it was not suitable for downsizing the machine room.

SUMMARY OF THE INVENTION Therefore, the present invention provides a show case in which a cold air outlet and a circulating cold air intake are disposed on the same surface, thereby reducing the size of the machine room.

[Structure of the invention]

Means for Solving the Problems The separate type show case of the present invention has a cooling chamber in which a cold air outlet for sending out cold air and a circulating cold air intake for sucking circulating cold air are arranged side by side on one wall, and stores mechanical parts. It has a machine box, a storage room with a transparent door that can be opened and closed to display and store products for sale, an introduction part for introducing cold air into the storage room, and an outlet part for leading out the circulating cold air after cooling the storage room to the outside of the storage room. An exhibition box forming a ventilation chamber, an outgoing cylinder through which cold air is distributed by connecting a cold air outlet and an inlet, and an incoming cylinder through which cold air is circulated by connecting a circulating cold air inlet and an outlet. The cooling chamber includes a plate fin type evaporator divided into a first section having an inlet and an outlet, and a second section forming a U-turn path, and a cooling chamber having an inlet and an outlet. A partition plate that further divides the first compartment into two parts, and a blower disposed between the suction port and the evaporator are provided to provide an adiabatic structure.

Function The cooling chamber is divided into a first section 42 having one wall 38 in which a cold air outlet 36 and a circulating cold air intake 37 are formed by the evaporator 34, and a second section 43 forming a U-turn path. 44 to the first section 42
is further divided into two between the cold air outlet 36 and the circulating cold air intake 37, thereby creating a U-shaped path from the intake 37 to the outlet 36. Further, the evaporator 34 is divided into a first cooling section 34B and a second cooling section 34C by a partition plate 44, so that the air from the blower 35 can easily pass through each fin uniformly.

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

Reference numeral 1 refers to a display case that is placed in a store such as a pharmacy or discount shop and serves as a display case for displaying and selling products. It has a door for loading and unloading, and these form a product storage chamber 2, and leg members 4 that form an unused space 3 under the product storage chamber 2 are provided. In this example, four pillars are presented as the leg members 4, but the invention is not limited to this.
The unused space may be made invisible by a board that acts as a blind board over the front and both sides.

10 is a display box 11 having a product storage room 21;
A machine box 12 that houses mechanical parts such as a compressor 30, a condenser 31, and an evaporator 34 and is formed separately from the display box 11 communicates the display box 11 and the machine box 12 with a ventilation space. At the same time, both boxes 11 and 12
This is a separate type of show case consisting of an air pipe 13 that forms a space for a mounting table (in this example, the display case 1 is used as the mounting stand).A typical example is a refrigerated show case (hereinafter referred to as a show case). ) and explain it.

The exhibition box 11 forms a ventilation chamber 22 in a part thereof, into which air cooled by an evaporator (=cooler) 34 provided in the machine box 12 (described later) (this is called cold air) is introduced. An inlet part 23 that guides the storage room 21 and an outlet part 24 that collects air after cooling the storage room (this is referred to as circulating cold air) and leads it out to the outside are separately formed in the ventilation room 22. are doing.

The machine box 12 includes a compressor 30, a condenser 31, and a condenser blower 3 that constitute part of the refrigeration cycle.
A first machine room 33 that accommodates the evaporator (=cooler) 34, an evaporator blower 35, etc.
In order to enable air to communicate with the blast pipe 13, a second cold air outlet 36 for sending out cold air and a circulating cold air intake 37 for sucking circulating cold air are arranged in parallel on one wall 38.
A machine room 39 is formed. The machine box 12 is disposed in an unused space 3 formed by the leg members 4 in order to make it difficult to see from the outside, particularly from the customer exhibition side of the display case 1.

The second machine room 39 is adiabatically divided from the first machine room 33 and serves as a cooling room, and the second machine room 39 will be described below. 2nd machine room 3
9 has a heat insulating material such as styrofoam on each side to form its inner wall surface, and in this room, a plate fin type evaporator 34 is connected to a wall 40 adjacent to the first machine room 33 and this wall. It is arranged so that its tube plate surface coincides with the opposing wall 41, and furthermore, the second machine room 39 forms a U-turn path with the first section 42 on the side where the suction port 37 and the discharge port 36 are located. It is divided into two sections, a second section 43. Also, the evaporator 34
The refrigerant inlet pipe and outlet pipe of the first
It is led to the machine room 33. The first section 42 is further divided into two by a partition plate 44 extending from between the cold air outlet 36 and the circulating cold air intake 37 to between the fins 34A of the evaporator 34. Further, an evaporator blower 35 and a blower case 45 surrounding the blower are arranged between the circulating cold air intake port 37 and the evaporator 34. On the other hand, 46 is a mounting plate that has holes 47 formed at appropriate locations for dew droplet processing, and on which the evaporator 34, blower 35, etc. are placed. Drain port 49
A drain tray 51 having an opening 50 located directly below the drain port 49 is held in such a manner that it can be taken in and out.

Since the first section 42 is partitioned into two by the partition plate 44, the evaporator 34 is also inevitably divided into two, the first cooling section 34B and the second cooling section 34C, and the circulating cold air intake. The air taken in through the port 37 passes between the fins of the first cooling section 34B, is cooled once, enters the second section 43, and cools down to the second section 43.
The direction of travel was changed by 180° in section 43, and the second
The air passes through the fins of the cooling section 34C, is cooled again, and is sent out from the cold air outlet 36.
Therefore, since the air that has been once cooled and dehumidified passes through the second cooling section 34C, the first cooling section 34
If the widths of the fins B and the second cooling section 34C are set to be the same, more frost will form on the fins on the first cooling section 34B side. Therefore, the width of the first cooling part 34B is the second width.
The partition plate 44 is positioned so that the width is larger than the width of the cooling part 34C, and the first and second cooling parts 34B, 3
It is preferable to allow frost to form on 4C in the same way. Since the second section 43 changes the direction of the air, its corner portions are formed into curved surfaces in order to reduce the resistance of the wall surface to the air.

Note that since the machine box 12 is placed in the unused space 3, its height is limited, so the evaporator 34
A horizontally long one whose vertical length is smaller than its horizontal length is suitable. In order to uniformly apply wind to this horizontally long evaporator 34 with one blower, the blower 4
It is necessary to increase the diameter of the evaporator 34 or use a cross-flow fan as the fan, but both are unsuitable for downsizing and cost reduction of the second machine room 39. It is very effective to use two parts.

The blower pipe 13 has one end connected to the cold air outlet 36 and the other end connected to the inlet of the introduction section 23, and an outgoing pipe 52 through which cold air flows, and one end connected to the circulating cold air intake 37.
and a return pipe 53 whose other end is connected to the outlet of the outlet part 24 and through which the circulating cold air flows.In this example, both pipes 52 and 53 are bellows-shaped hoses that are expandable and bendable. Insulating material such as styrofoam should be placed around this hose. Then, using the return tube 53, display box 1
The drain pipe can be omitted by guiding the dewdrops stored in the machine box 12 to the second machine room 39.

According to this configuration, the second machine room 39 which is used as a cooling room in the machine box 12 has a first compartment 42 having one wall 38 in which a cold air outlet 36 and a circulating cold air inlet 37 are formed in the evaporator 34. 2nd section 4
By further partitioning the first section 42 into two from between the inlet port 37 and the outlet port 36 by the partition plate 44, the air taken in from the inlet port 37 is divided into two sections. A substantially U-shaped conveyance path leading to the outlet 36 formed in the wall can be formed, and a special pipe and insulation material for leading to the outlet 36 can be omitted. Further, the air conveyed in a U-shape is separated from the first cooling section 34B by the partition plate 44.
After being cooled once in the first cooling part 34B of the evaporator 34, which is divided into a second cooling part 34C and a second cooling part 34C, it is cooled again in the second cooling part 34C, thereby improving cooling efficiency. . Furthermore, since there is a height restriction, the evaporator 3 has to be formed in an oblong shape.
4 is divided into the first cooling section 34B and the second cooling section 34C, so that the ventilation by the blower 35 is uniform in the width direction of the first cooling section 34B and the second cooling section 34C, respectively. This allows for efficient cooling. And throughout, the second
This is very effective in promoting compactness of the machine room 39.

〔Effect of the invention〕

As described in detail above, according to the present invention, the cooling chamber is formed by a plate fin type evaporator and includes a first section having one wall forming a cold air outlet and a circulating cold air intake;
The first section is divided into a second section forming a turn path, and the first section is further divided into two sections from between the inlet and the outlet by a partition plate.
By partitioning the cooling room into two, a roughly U-shaped path can be created from the inlet to the air outlet, eliminating the need for ducts (or pipes) and insulation materials for guiding cold air to the air outlet, making the cooling room more compact. In turn, it is possible to promote downsizing of the machine box. On the other hand, a plate fin type evaporator is divided by a partition plate into a first cooling part facing the inlet and a second cooling part facing the outlet. After being cooled once in the first cooling section, it is cooled again in the second cooling section, so that the cooling efficiency can be improved. Furthermore, by dividing the evaporator, it becomes easier for the air from the blower to pass through each fin uniformly, and the cooling capacity of the evaporator can be effectively utilized.

[Brief explanation of the drawing]

Each figure shows one embodiment of the present invention, and FIG.
A schematic plan view of the machine room with the top insulation removed,
Figure 2 is a partially cutaway external perspective view of the separate show case installed in the display case, Figure 3 is an exploded perspective view of the machine box, and Figure 4 is the second
A in Figure 3 with mechanical parts stored in the machine room
-A sectional view and FIG. 5 are longitudinal sectional views of the display box. 10... Separate type case, 11...
...Display box, 12...Machine box, 13...Blow pipe, 3
3...First machine room, 39...Second machine room (=cooling room), 34...Evaporator, 35...Evaporator blower,
36... Cold air outlet, 37... Circulating cold air intake port,
44...Partition plate.

Claims (1)

[Claims] 1. It has a cooling room with a cold air outlet for sending out cold air and a circulating cold air intake for sucking in the circulating cold air, with a machine box for storing machine parts and a transparent door that can be opened and closed to display products for sale. A display box having a storage chamber for display storage, a ventilation chamber having an introduction section for introducing cold air into the storage chamber, and an outlet section for discharging the circulating cold air after cooling the storage chamber to the outside of the storage room, the cold air outlet and the introduction section. The cooling chamber includes an outgoing pipe that connects the circulating cold air inlet and the outlet part to allow the cool air to flow therethrough, and a return pipe that connects the circulating cold air intake port and the outlet part to allow the circulating cold air to flow through the air. A plate fin type evaporator is divided into a first section having an inlet and an outlet, and a second section forming a U-turn path, and the first section is further divided into two sections between the inlet and the outlet.
What is claimed is: 1. A separate-type show case characterized in that the case is configured in an adiabatic manner by providing a partition plate that partitions the inlet into two parts, and a blower disposed between the suction port and the evaporator.