JP2760376B2 - Refrigerated display case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating and refrigerated showcase for a cold air circulating showcase and the like, and more particularly, to a piping structure of a refrigerant pipe provided in a showcase.

[0002]

2. Description of the Related Art First, FIG. 2 shows a configuration of a refrigerated showcase to which the present invention is applied. The illustrated example is a cold air circulation type open showcase with a two-layer air curtain,
In the figure, 1 is a case main body, 2 is a product display room in a warehouse equipped with a display shelf 2a, 3 and 4 are inner and outer double inners surrounding the product display room 2 and defined inside the case main body 1, and Outer cool air circulation ducts, 5 and 6 are blower fans housed in cool air circulation ducts 3 and 4, 7 is a cooler installed in inner cool air circulation duct 3, 8 is a condensin of a refrigerator separated and separated from case body 1. The cooling units 9 and 10 are refrigerant liquid pipes and suction pipes drawn from the cooler 7, and 11 is an expansion valve connected to the inlet of the cooler.

In such a configuration, the condensing unit 8 of the refrigerator is operated by operating the condensing unit 8 of the refrigerator and the fans 5 and 6 when the showcase is kept cool.
The high-temperature, high-pressure refrigerant liquid is sent through the refrigerant liquid pipe 9 and supplied to the cooler 7 through the expansion valve 11. The refrigerant gas evaporated in the cooler 7 returns to the condensing unit 8 through the suction pipe 10.

On the other hand, on the showcase side, two layers of inner and outer cold air curtains A and B are blown out at the front opening of the case body 1 through the cool air circulation ducts 3 and 4, thereby keeping the products displayed in the refrigerator cool. Is done. By the way, when such a refrigerated showcase is installed and operated in a large store or the like in an urban area, a recent tendency is to install a condensing unit for a refrigerator on the roof of a building in view of noise, installation space, and the like. In many cases, a piping system is used in which a refrigerant connection pipe is used to connect a showcase installed in a store downstairs.

[0005] At present, such installation conditions are conventionally dealt with by adopting a piping structure as shown in FIG. 3 between the showcase and the condensing unit of the refrigerator. That is, in the conventional refrigerated showcase, a short refrigerant liquid pipe 9 and a suction pipe 10 drawn in advance from the cooler 7 for a product shipped from a factory are piped to the bottom side of the case body 1.

Therefore, at the installation site of the showcase,
Before the showcase is carried in, the condensing unit 8 of the refrigerator installed on the roof of the building 12, etc., sends the liquid from the condensing unit 8 to the floor of the showcase installation location in the store, and connects the refrigerant connection pipes 13, 14 on the suction side to the wall surface of the building. Along the plumbing,
After the showcase is carried into a predetermined position in the store and installed, the front ends of the pipes 13 and 14 already bent are bent and inserted into the inside of the case body 1 from the bottom side, and the liquid pipe 9 and the suction described above are sucked into the case. It is connected to the tube 10 in a squirrel-cage manner, and further brazed so as to be interconnected.

[0007] Since dew condensation occurs on the pipe surface of the refrigerant connection pipe 13 on the suction side through which the low-temperature refrigerant gas flows, the heat insulating material 1 extends over the entire length of the connection pipe 13 during pipe construction.
5 is wound around.

[0008]

However, the conventional piping structure shown in FIG. 3 has the following problems in terms of the piping work at the installation site and the space for installing the showcase. (1) Since the external refrigerant connection pipes 13 and 14 piped inside the store are piped to the back side of the showcase, the case main body 1 cannot be pressed against the wall surface of the building 12 without gaps and installed. It is necessary to keep the space D away from the wall surface. As a result, a useless blind spot space remains between the showcase and the wall of the building, and the installation occupation area of the showcase increases accordingly.

(2) If gas leaks or the like occurs in the refrigerant connection pipes 13 and 14 piped inside the store after the installation of the showcase, repair work on the pipes is performed unless the showcase itself is moved and retracted. Can not do. (3) Since the refrigerant connection pipes 13 and 14 laid in the store are routed to the bottom side of the showcase, in order to avoid interference with the connection pipes, the drainage drain pipes drawn from the case body need to be piped. It is troublesome.

The present invention has been made in view of the above points, and has been installed by improving a piping structure of a refrigerant liquid pipe and a suction pipe previously piped into a case body drawn from a cooler built in a showcase. A refrigerated showcase, especially its refrigerant, which makes it easy to install refrigerant connection pipes on site and allows the showcase to be installed without leaving an unnecessary blind space between the building wall and the back of the showcase An object of the present invention is to provide a pipe piping structure.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a refrigerating and refrigerated showcase which incorporates a cooler in a duct of a case body and is used in combination with a separate refrigerator condensing unit. A plurality of showcases connected and installed, a refrigerant liquid pipe drawn out from a cooler of each of the plurality of showcases, and a suction pipe connected in parallel, and one of the plurality of showcases is connected. In the showcase, the refrigerant liquid pipe and the suction pipe drawn out from the cooler are set up as a common pipe, and the upper end of the pipe protrudes outside through the ceiling wall of the case body. The case is operated by connecting the case to one condensing unit in parallel.

With this configuration, when a plurality of showcases are connected, the refrigerant pipes drawn from the coolers of the respective showcases can be connected in parallel with the refrigerant pipe as a common pipe.
This simplifies piping work at the installation site.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same reference numerals are given to the same members corresponding to FIG. FIG. 1 shows a case in which a plurality of showcases connected and installed in the same place are connected in parallel to one condensing unit 8 for operation.

That is, one of the plurality of showcases
The refrigerant liquid pipe 9 and the suction pipe 10 drawn from the cooler 7 built in the case body 1 of the showcase are
After the side space of the cooler 7 is routed inside, the pipe is raised upward from its rear end, and its upper end penetrates the heat insulating wall of the ceiling of the case body 1 and protrudes out of the case.

The refrigerant pipes can be connected in parallel with the refrigerant pipes drawn from the coolers 7 of the respective showcases as common pipes, thereby simplifying the piping work at the installation site. In this case, the flow rate of the refrigerant flowing through the refrigerant liquid pipe 9 and the suction pipe 10 increases, so that the pipe diameter is selected in advance in accordance with the number of parallel showcases.

[0016]

According to the present invention, the refrigerated showcase is
The configuration described above has the following effects. (1) When multiple showcases are connected, refrigerant pipes drawn out from the coolers of each showcase can be connected in parallel, using the refrigerant pipe as a common pipe, which simplifies piping work at the installation site. I can do it.

In addition, it is not necessary to route an external refrigerant connection pipe, which is piped between a separate condensing unit and a refrigerator at the installation site of the showcase, through the rear side of the showcase to the floor, and therefore, there is no need for piping. The case body of the showcase can be installed in the store by pressing it against the wall of the building, saving space.In addition, the space between the refrigerant pipe built into the showcase and the external refrigerant connection pipe installed inside the store can be saved. Connection work can be done easily.

(2) Even in the event that gas needs to be repaired due to a gas leak in the external refrigerant connection pipe installed inside the store, repair work on the piping can be performed without moving the showcase. Thus, it is possible to provide a refrigerated showcase that is advantageous in terms of installation space and plumbing work when installing the showcase locally.

[Brief description of the drawings]

FIG. 1 is a piping system diagram of an embodiment in which a plurality of showcases are connected and used.

FIG. 2 is a cross-sectional view of the configuration of a two-layer air curtain cold air circulation open showcase.

FIG. 3 is a conventional piping structure diagram of a refrigerant pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 7 Cooler 8 Condensing unit of refrigerator 9 Refrigerant liquid pipe 10 Suction pipe 11 Expansion valve 12 Building 13, 14 Refrigerant connection pipe

Claims (1)

(57) [Claims] A refrigerator is installed in a duct of a case body, and a plurality of showcases connected and installed are provided in a refrigerated showcase used in combination with a separate refrigerator condensing unit. A refrigerant liquid pipe drawn out from a cooler of each showcase and a suction pipe are connected in parallel, and a refrigerant liquid pipe drawn out of a cooler is connected to one of the plurality of showcases. Start-up pipe with the suction pipe as a common pipe, the upper end of which penetrates the ceiling wall of the case body and protrudes to the outside, and operates with multiple showcases connected in parallel to one condensing unit A refrigerated showcase characterized by the following characteristics.