JPH02272284A - Cold air circulation type open show case - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is provided with a main body case having a chevron-shaped cross section, and has an air outlet in the center and a refrigerator interior formed on both sides of the main body case. This invention relates to a cold air circulation type flat oven Jiro case that cools and keeps the inside of the refrigerator cold by blowing out cold air toward a provided blow-in port.

[Conventional technology]

In Fig. 0, the oven showcase shown in Fig. 2 is put into practical use as an oven showcase of this type. It is formed into a substantially chevron-shaped cross section, and has chamber interiors 4A and 4B formed inside the inner box, respectively. Parallel inner boxes 3A.

Two adjacent side walls of 3B are separated by an appropriate width, and a partition plate 5 is provided in the center. A cold air circulation path 6 is formed between the outer box 2 and the inner box 3 so as to surround the inner boxes 3A and 3B. The cold air circulation path 6 has one end at the central upper end of the main body case 1 forming an outlet 6a that opens outward, and the other end attached to the outlet 6a at the outer upper end of the inner boxes 3A and 3B. A fan plenum 7 is provided at the bottom, a fan (not shown) is supported by the fan plenum 7, and a cooler 8A is provided downstream of the fan. ,
Each has a built-in 8B.

The two left and right coolers 8A, 8B are connected to a separately placed condensing unit (not shown) via refrigerant piping, and after the refrigerant from the condenser is adjusted in flow rate and depressurized by an expansion valve, it is diverted to the cooler 8A. , 8B.

In the open showcase, products are stored and displayed in the interiors 4A and 4B. Thus, the air inside the refrigerator is sucked into the cold air circulation path 6 from the suction port 6b by the fans, and is circulated as cold air through the cooler 8. This cold air is from outlet 6
Blows out from a toward the suction port 6b, forming a cold air curtain at the top opening of each refrigerator, and also blowing air inside the refrigerators 4A and 4B.
Keep it cool.

[Problem to be solved by the invention]

By the way, it is desired that the two compartments 4 can store products with different cooling temperatures, and that they can also be defrosted using different defrosting cycles.However, in conventional open showcases, the left and right coolers Since the same refrigerant is circulated and supplied to both, the above cannot be satisfied.

An object of the present invention is to provide a cold air circulation type open showcase in which left and right compartments can store products having different cooling temperatures, and each cooler can be defrosted under optimal conditions.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a main body case having a substantially mountain-shaped cross section, an air outlet opening in left and right opposite directions at the upper center of the main body case, and a chamber interior on both left and right sides of the air outlet. Further, suction ports are provided on the outside of the refrigerator, and a cold air circulation path is formed to connect the outlet and the suction port and surround the inside of the refrigerator, and a fan and a cooler are installed in the cold air circulation path. In a cold air circulation type flat oven showcase in which a refrigerator is installed, the coolers are installed correspondingly to the left and right chambers, and each cooler is provided with an expansion valve, and each cooler is provided with an expansion valve on the upstream side of each expansion valve. An on-off valve shall be provided.

[Effect]

Refrigerant is fed into each cooler with a flow rate and pressure adjusted by each expansion valve according to the cooling load inside the refrigerator. Therefore, it is possible to independently set the cooling temperature in each refrigerator, and it is also possible to defrost the refrigerator independently by closing the on-off valve and stopping the supply of refrigerant to the cooler.

〔Example〕

FIG. 1 is a refrigerant circuit diagram showing an embodiment of the present invention, and parts common or identical to those in FIG. 2 are designated by the same reference numerals.

In FIG. 1, reference numeral 11 denotes a cooler 8A that allows the refrigerant sent out from the condensing unit to flow in the direction of the arrow.

Piping 12 circulates and supplies piping to 8B, and 12 connects piping 11 to cooler 8A
, 8B, respectively.

A solenoid valve 13A that branches to 11B and can arbitrarily open and close piping 11A, 11B or both.

13B is an expansion valve inserted into the pipes 11A and IIB, respectively, to adjust the flow rate and reduce the pressure of the refrigerant according to the coolers 8A and 8B, and 14A and 14B are the coolers 8, respectively.
A, temperature control thermostat for 8B, 15A,
15B is a defrosting thermostat that senses the temperature of the coolers 8A and 8B during defrosting operation and ends defrosting.

In the above-mentioned configuration, the oven syringe case divides the stored products into two groups of products having different cooling temperatures and stores and displays them in the chambers 4A and 4B, respectively. However, inside the refrigerator 4A, 4
Thermostats 14A and 14B are set to cool the refrigerants 8A and 14B to predetermined temperatures, respectively, and the refrigerants each having a reduced pressure by the expansion valves 13A and 13B are circulated and supplied to the coolers 8A and 8B. Then, defrosting operation is set according to the frost formation status of each of the coolers 8A and 8B, and during the defrosting operation, the supply of refrigerant to each of the coolers 8A and 8B is stopped by the solenoid valve 12, and the heater (not shown) is activated. The heated air is sent to the cooler and defrosted.

When defrosting is completed, the thermostats 15A and 15B of the coolers 8A and 8B sense the temperature and the temperature is lowered to the cooler 8A.

8B shifts to cooling operation again at the optimum timing.

〔Effect of the invention〕

According to the second invention, the main body case has a substantially chevron-shaped cross section;
The main case is provided with an air outlet opening in left and right opposite directions at the upper center of the main body case, an air outlet on both sides of the air outlet, and a suction port on the outside of the oven. In addition, in a cold air circulation type flat open zipper case in which a cold air circulation path is formed to surround the inside of the refrigerator, and a fan and a cooler are disposed in the cold air circulation path, the coolers are installed in each of the left and right refrigerators. In addition to installing them in parallel, each cooler was equipped with an expansion valve, and an on-off valve was installed upstream of each expansion valve, allowing the left and right chambers to be set at different temperatures. It becomes possible to optimally perform cooling operation and defrosting operation of the cooler according to the temperature, and products having different cooling temperatures can be stored and displayed in the two warehouses.

[Brief explanation of drawings]

FIG. 1 is a refrigerant circuit diagram of an open showcase showing an embodiment of the present invention, and FIG. 2 is a perspective view of an open showcase case to which the present invention is applied. l...main case, 4A, 4B...interior, 6...
Cold air circulation path, 6a...Blowout port, 6b...Suction port, 8
A, 8B... Cooler, 12... Solenoid valve (on/off valve),
13A. 13B expansion cell Fig. 2 Fig. 1

Claims (1)

[Claims] 1) Equipped with a main case with a substantially mountain-shaped cross section, an air outlet opening in opposite directions to the left and right at the upper center of the main case, an internal chamber on both left and right sides of the air outlet, and a suction port on the outside of the internal chamber. At the same time, a cold air circulation path is formed to connect the blow-off port and the suction port and surround the inside of the refrigerator,
In a cold air circulation type flat open showcase in which a fan and a cooler are arranged in the cold air circulation path, the coolers are installed correspondingly to the left and right compartments, respectively, and
A cold air circulation type flat open showcase characterized in that each cooler is provided with an expansion valve, and each of the expansion valves is provided with an on-off valve on the upstream side.