JPH0599551A - Cooled storage structure - Google Patents

Abstract

PURPOSE:To provide a cooled storage structure with storage chambers in different temperature zones with a low manufacturing cost and simple construction. CONSTITUTION:An evaporator 5 and fan 6 for cold air circulation are provided in a main storage chamber 3 that is surrounded by a heat insulation wall 2. Part of the cold air in the storage chamber 3 circulates through the outlet and inlet sections 13A, 14B of the cold air by a fan 26 in a cold air channel 25 formed outside the outer wall 22 of a sub-storage chamber 32 provided in a heat insulating box 17. The outer wall 22 is a heat transfer panel, and the sub-storage chamber 23 is cooled at temperature different from the temperature in the main storage chamber 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage suitable for storing at an optimum storage temperature according to the type of stored products.

[0002]

2. Description of the Related Art In general stores, restaurants, hotels and the like, various foods are handled, and inevitably various kinds of goods are stored in one refrigerator.

In this case, the quality of fish, meat, vegetables, fruits, desserts such as cakes, puddings and ice creams, and beverages such as juice, beer, wine, etc. are maintained in good condition according to the type of food. There is a suitable storage temperature for It may also be desirable for the storage compartment to contain a suitable amount of moisture.

In order to meet the above demand, an indirect cooling type storage as disclosed in Japanese Utility Model Laid-Open No. 64-24993 has been proposed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The inside is kept at a high humidity and is suitable for storing fresh food, but since there is only one storage room with a constant temperature zone, it is not suitable for storing frozen food, beer, wine, etc. together. is there. When making storage rooms with different temperature zones, it is possible to install a refrigeration cycle device for each storage room, or to form a cold air circulation path that distributes and circulates cold air and provide control means for controlling the distribution flow rate of the cold air. Although it can be dealt with, there is a problem that the device becomes large and the cost becomes high.

The present invention is a single refrigeration cycle apparatus, which is a refrigerating storage box having a plurality of storage chambers having different temperature zones, can be manufactured at low cost, and is structurally simple and easy to use. And is suitable for storing.

[0006]

According to the present invention, an evaporator and a cold air circulation fan constituting a refrigeration cycle are arranged in a refrigerator surrounded by a heat insulating wall and are cooled, and a main storage chamber connected to the main storage chamber. An installed heat insulating box, an outer wall formed by a heat transfer panel, a sub-storage chamber defined in the heat insulating box, and the main storage chamber formed between the outer wall and the heat insulating box. It is configured by a cool air passage through which a part of the cool air from and a fan arranged in this cool air passage.

[0007]

Function: A part of the cool air in the main storage chamber is introduced into the cool air passage formed in the heat insulating box by the fan, and the cool air is circulated to return to the main storage chamber for circulation. Since the cool air flows around the outer wall of the sub-storage chamber including the heat transfer panel, the sub-storage chamber is cooled via the heat transfer panel. The cooling temperature in the sub-storage room and the cooling temperature in the main storage room are managed in different temperature zones, and can be classified according to the type of food and stored in a refrigerator with an appropriate storage temperature to maintain good quality. The outside air that enters the sub-storage room does not circulate with the cold air, which prevents excessive frost formation on the evaporator and prevents cooling failure of the main storage room.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment will be described with reference to FIGS. Reference numeral 1 denotes a storage main body formed by a heat insulating wall 2, and an evaporator 5 and a cool air circulation fan 6 are provided on a lower surface of a top surface 4 in a main storage chamber 3.
And are installed. Reference numeral 7 denotes a machine room for accommodating a refrigerator unit such as a compressor, a condenser, and a decompression device that are connected to the evaporator 5 by piping to form a refrigeration cycle, and has a detachable grill surface 8 on the front surface. The grill surface 8 is provided with an operating portion 9 provided with temperature control knobs and operation buttons, and a slit hole 10 for taking in outside air for cooling into the machine room 7.

An opening 11 is formed in the front surface of the main storage chamber 3, and a pivotable opening / closing door 12 is provided therein. The inside of the main storage chamber 3 is cooled to a temperature of -15 ° C or lower.

By the way, in the top surface portion 4 of the main storage chamber 3, there is an inlet hole 13 through which the cooling air in the main storage chamber 3 enters a passage of cold air, which will be described later, and from the passage, it returns to the storage chamber 3. An outlet hole 14 is formed at both ends. On the other hand, the storage body 1
A heat insulating box 17 having a front surface having an opening 15 and the other surface, that is, a back surface, a top surface, and left and right side surfaces formed of heat insulating walls is provided on the upper surface of the. A transparent glass sliding door type sliding door 18 is provided in the front opening 15 of the heat insulating box 17. In the lower part of the heat insulation box 15, the inlet hole 13 and the outlet 1
4, holes 19 and 20 are formed at positions corresponding to 4 and the inside of the main storage chamber 3 and the inside of the heat insulating box 17 communicate with each other through an inlet portion 13A and an outlet portion 14B. In the heat insulation box 17, a material having good thermal conductivity, for example, a metal plate such as a stainless steel plate,
In short, the outer wall 22 is formed by the heat transfer panel.
2 is kept at a predetermined distance from the inner surface of the heat insulating box 17, and a sub-storage room 23 is provided therein, which serves as a product storage section. The outer wall 22
Closed passage 25 formed between the inner surface of the insulation box 17 and
Is a cold air passage in which the cooling air in the main storage chamber 3 exits the main storage chamber 3 and returns to the main storage chamber 3 again. A fan 26 that introduces and circulates the cooling air is provided in the passage 25. The cool air circulates in the passage 25 as indicated by an arrow a, so that the outer wall 22 is cooled and the sub-storage chamber 23 is indirectly connected. Is cooled to. The room temperature of the sub-storage room 23 becomes 0 ° C. or lower.

As described above, a part of the cooling air in the main storage chamber 3 is pulled and circulated through the passage 25 provided separately, and the passage 25 is provided with the auxiliary storage chamber 23 surrounded by heat and having good heat conductivity. Depending on the configuration, it is possible to put frozen products in the main storage chamber 3 and fresh products such as meat and fish in the sub-storage chamber 23 as well as beer cups, jockeys, wine glasses and the like for cooling. The drain water and defrost water in the main storage chamber 3 merge at the drain port 26 and are drained by the drain hose 27. 28 is a shelf. In the case of this configuration, the inside of the sub-storage chamber 23 is cooled by the outer wall 22 thereof, and the cool air (indicated by the arrow a) that cools the outer wall 22 is connected only to the inside of the lower main storage chamber 3 and to the inside of the sub-storage chamber 23. Are not directly connected. Therefore, the outside air that enters when the sliding door 18 is opened and closed does not flow together with the cold air.

[0012] This is because the outside air that enters the product storage unit, which was proposed when the cooling air in the main storage unit was directly guided to the sub-storage unit, which is another product storage unit, circulates together as in the prior art. , The moisture in the outside air increases the amount of frost formed on the evaporator in the main storage room, and the problem of poor cooling does not occur.

Next, a second embodiment will be described with reference to FIGS. 4 and 6. The same or equivalent components as in the first embodiment are designated by the same reference numerals.

Above the top surface 4 of the main storage room 3, there is an interior 2
Insulation box 17 divided into one room, that is, a first sub-storage room 30 and a second sub-storage room 31 located to the right of the first sub-storage room 30.
b is provided. 32 indicates the partition wall. The opening 19b provided in the lower part of the first sub-storage chamber 30 corresponds to the cold air inlet hole 13 formed on the ceiling part 4 side to become the inlet part 13A, and the opening 20b provided in the lower part of the second sub-storage chamber 31.
Corresponds to the cold air outlet hole 14 on the side of the ceiling portion 4 and the outlet portion 1
4B, which communicates with the inside of the main storage room 3.

Further, ducts 33 and 34 are partially formed at the inlet side portions of the sub-storage chambers 30 and 31, respectively, so that cool air can be smoothly guided into the sub-storage chambers 30 and 31. Three
3a and 34a show the duct walls. Further, a flow path 35 through which cold air passes is opened in the partition wall 32, and the two sub-storage chambers 3
0 and 31 are connected. In each of the sub-storage chambers 30 and 31, cold air fans 37 and 38 that circulate the cool air are arranged in the ducts 33 and 34, while on the second sub-storage chamber 31 side, a heater 39 that warms the cool air is provided in the duct 34.
Is built in. A thermostat 40 for controlling the heater 39 is provided below the duct 34. Front opening 41 of each sub-storage room 30, 31
Is closed by a slide door 18b made of transparent glass.

In the above structure, the cold air circulation is as follows. The cooling air in the main storage chamber 3 in which the fan 6 rotates and exchanges heat with the evaporator 5 passes through the inlet portion 13A, is sucked by the cooling fan 37, passes through the inside of the duct 33, and is first left first.
Enter the sub storage room 30. The cold air in the sub storage chamber 30 passes through the flow path 35, is sucked by the cooling fan 38, passes through the duct 34, is warmed by the heater 39 on the way, and enters the second sub storage chamber 31 on the right. After that, the exit portion 14B
Return to main storage room 3. In the second sub-storage room 31,
The thermostat 40 senses the temperature in the room and controls the ON / OFF of the electricity supply to the heater 39 to control the temperature.

By circulating such cold air,
The inside of the main storage room 3 has a temperature range of 0 ° C. to 5 ° C. and becomes a normal refrigerating room. The inside of the first sub-storage room 30 has a temperature range of 5 ° C to 10 ° C, which is suitable for a storage room for cakes and Western confectioneries. In addition, the temperature inside the second sub-storage room 31 is in the temperature range of 15 ° C. to 20 ° C., which is suitable for a storage room for wine and the like.

As described above, a refrigerator having three temperature zones is formed in one refrigeration cycle. That is, by circulating cold air from the lowest temperature to the highest temperature, many temperature zones can be created, and various products can be stored with good quality maintained in one storage.

In order to obtain each of these temperature zones, conventionally, a refrigeration cycle is generally prepared by the number of required temperature zones, or a plurality of damper thermos or the like is used to control the amount of cold air to be distributed. However, the device had to be large-sized and had a complicated structure, but in the case of the present invention, it can be carried out with only one refrigeration cycle and is inexpensive in price.

FIG. 7 and FIG. 11 show a third embodiment, in which the machine room on the side is moved to the upper part to expand the space of the main storage room and to obtain a uniform weight balance on the left and right in the case of ceiling suspension. In addition to facilitating work, layout design is not restricted by the symmetrical design, and drainage and defrost water in the main storage room is automatically evaporated using the heat exhausted from the machine room to manage wastewater. The present invention relates to a cooling storage with a structure that does not require.

The same or equivalent components as those in the above-described embodiment are designated by the same reference numerals. The storage body 1 is a foam insulation 2
The front and rear surfaces are opened by the structure surrounded by the upper and lower wall surfaces that are integrally foamed with a, and slide type transparent glass doors 12 and 12 are provided in the opening, and if the glass doors 12 and 12 are opened, they are stored. It is a so-called pass-through type storage that allows items to be taken out from both sides of the chamber 3. A natural convection type evaporator 5b is installed on the ceiling portion 4 of the storage chamber 3, and a drain pan 50 for receiving the defrosted water is installed below the evaporator 5b. The machine room 7 is oriented horizontally and is provided at the center of the upper part of the storage main body 1. This machine room 7
The refrigerator unit U housed inside is composed of a compressor 52, a condenser 53, a condenser fan 54, a decompression device 55, etc., each of which is installed and fixed on the upper surface of the ceiling portion 4. Then, ceiling-mounting metal fittings 56, 56 having a downward U-shaped cross section for hanging the storage main body 1 from the ceiling are screwed to both ends of the ceiling portion 4.

A square hole 57 is formed in the center of one of the ceiling mounts 56 as shown in FIG. Further, as shown in FIGS. 7 and 10, an outer case 70 is erected so as to surround the upper surface 4 of the ceiling portion 4, and thereby the refrigerator unit U and the ceiling mount 56 are hidden.

By the way, the air sucked into the condenser 53 of the refrigerator unit U is taken in from both front and rear sides of the grill surfaces 8 as shown by arrows in the figure. On the left side of the storage room 3,
A cover 59 having the same width as the lateral width of the storage chamber 3 and having a space path 58 in the vertical direction formed therein is provided. A drain hose 60 that guides the drain discharged from the drain pan 50 to the lower part is passed through the space 58 of the cover 59. Reference numeral 61 denotes a lower cover which is provided in the lower portion of the storage chamber 3 and in which the evaporation tray 62 is housed and installed. The left end is open and communicates with the space 58. The evaporation tray 62 is made of a material that does not rust, such as a stainless steel plate, and has a heater 64 attached to the bottom surface. As shown in FIG. 11, the lower end of the drain hose 60 faces the left end opening of the evaporation tray 62 and receives drain water.

Large holes (for example, round holes, square holes, and oblong holes) 65 having an appropriate shape are formed in the left and right side walls of the lower cover 61 to serve as exhaust holes for exhaust heat from the cooling unit U. .. In addition, such a perforated lower cover 61 has an evaporator 62.
The surrounding area makes it aesthetically beautiful. Reference numeral 66 denotes the air (high in temperature) discharged from the condenser 53 in the space 5
8 is a duct for guiding to 8 and is formed at the rear part of the compressor 52. As shown in FIGS. 10 and 11, the duct 66 is provided with air-introducing walls 67, 67 opened in an eight shape at the inlet opening, and the duct 66 has a structure in which the square hole of the ceiling mount fitting 56 is inserted. ing.

Therefore, the air discharged from the condenser 53 passes through the condenser fan 54 and the compressor 52, and then the duct 6
6 and is guided from the duct 66 to the evaporation tray 62 through the inside of the cover 59 on the left side surface. The drain water in the evaporation dish 62 is naturally evaporated by this exhaust hot air. The left side shape of the evaporation tray 62 is chamfered into a tapered shape 71 so that the air flows along the cover 59 without being obstructed.

As described above, when the cooler unit U is not provided on one side of the storage body 1 as in the first and second embodiments, but is installed on the central upper surface of the storage body 1,
The weight balance when hanging from the ceiling is improved, and the lifting work is improved in time and labor, improving efficiency.

Since the design is common even when viewed from the front and the back, when it is installed in the kitchen room, the layout design is facilitated, and it is not necessary to consider the restrictions on installation and the directionality. Evaporator 5b
The drain water from is guided to the evaporation tray 62 arranged in the lower part of the storage main body 1 by the drain hose 60, heated and evaporated by the heater 64, and the exhaust hot air after passing through the condenser 53 is discharged into the duct 66 and the space of the cover 59. By forming the air passage through the passage 58 to the upper surface of the evaporation tray 62 to allow the air to flow, the evaporation of the drain water can be increased and the water can be effectively evaporated. There is no need for a drain tank and the work of draining the water in the tank as in the past, and there is no need for wastewater management.

[0028]

As described above, according to the present invention, a closed cold air passage through which a part of the cold air from the main storage chamber passes and circulates around the sub-storage chamber provided separately from the main storage chamber, is provided. By cooling the outer wall plate of the sub-storage room made of a material with good conductivity,
The temperature of the sub storage chamber can be different from that of the main storage chamber.

Since the cold air is not directly introduced into the sub-storage room, it is circulated without being affected by the outside air that enters the sub-storage room, and there is no excessive frost formation on the evaporator. While maintaining a high temperature, the single refrigeration cycle device can efficiently cool the sub-storage room.

Further, a part of the cool air in the main storage chamber is guided to the first sub-storage chamber, and is also flown to the second sub-storage chamber communicating with the first sub-storage chamber to return to the main storage chamber for circulation of cold air, Moreover, by providing a heater for warming cold air in the second sub-storage room, a cooling storage box having three temperature zones can be provided at low cost, which is suitable for installation in the kitchen room of a restaurant or hotel. Become.

[Brief description of drawings]

FIG. 1 is a front view of a cooling storage according to a first embodiment.

FIG. 2 is a front sectional view of the cooling storage.

FIG. 3 is a sectional view taken along the line AA in FIG.

FIG. 4 is a front view of a cooling storage according to a second embodiment.

FIG. 5 is a front sectional view of the cooling storage.

6 is a sectional view taken along line BB in FIG.

FIG. 7 is a front view of a ceiling-mounted cooling storage cabinet according to a third embodiment.

FIG. 8 is a sectional view taken along line CC of FIG.

9 is a sectional view taken along line DD in FIG.

FIG. 10 is a top view showing an arrangement of upper mechanical device parts of the cooling storage.

11 is a sectional view taken along line EE in FIG.

[Explanation of reference numerals] 1 main storage unit 3 main storage chamber 5 evaporator 13 inlet hole 14 outlet hole 23 sub-storage chamber 25 cold air passage 30 first sub-storage chamber 31 second sub-storage chamber 39 heater

Claims (2)

[Claims] 1. A main storage room, in which an evaporator and a cold air circulation fan constituting a refrigeration cycle are placed in a refrigerator surrounded by a heat insulating wall and cooled, and a heat insulating box connected to the main storage room. And an outer wall formed of a heat transfer panel to define a sub-storage chamber defined in the heat insulation box, and a part of the cool air from the main storage chamber formed between the outer wall and the heat insulation box. A cooling storage comprising a flowing cold air passage and a fan arranged in the cold air passage. 2. A main storage chamber surrounded by a heat insulating wall and having an evaporator therein, and provided next to the main storage chamber, and an internal space of the main storage chamber and a space of the main storage chamber are formed in a boundary wall portion thereof. A heat-insulating box that communicates via the cold air inlet / outlet, a plurality of sub-storage chambers that are formed by partitioning in the heat-insulating box and communicate with each other by the cool-air ventilation ports provided on the partition walls, and a cold-air ventilation passage provided in each sub-storage chamber A duct with a fan inside the ventilation passage
A cooling storage cabinet, comprising: a heater provided in a duct of an auxiliary storage chamber located on the leeward side through which cold air flows.