JPH0740948Y2 - Low temperature and high humidity type showcase - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a low-temperature and high-humidity showcase having a cooling system and a section capable of displaying various kinds of items and setting various management conditions. is there.

(Prior Art) Conventionally, cooling coils in a cooling system are designed one by one for one environmental condition, and whether the cooling coils are installed in both an air conditioning system and a refrigeration system. It corresponded to 1 condition 1 regardless.

The air-conditioning system disclosed in Japanese Patent Laid-Open No. 61-143640 adjusts the intake amount of air-conditioning into each room. As a method of using the cooling coil, there are 1
It is designed for three conditions, and one coil is divided into each room for use, and it is not for dealing with different cooling conditions in each room.

Also, as a device related to a showcase, the actual development of Sho 55-37452
There are Japanese Patent Publication No. 60-116312 and Japanese Laid-Open Patent Publication No. 60-116312, but the former one prevents drying of the displayed products and cools the latter, and the latter one separately arranges a humidifier, Each of them corresponds to one condition 1.

(Problems to be solved by the invention) In the conventional showcase, it is difficult to put various products with different conditions in one showcase because it is considered that one product corresponds to one product management condition. It was

Currently, in a store, products with similar management conditions are mixed and used in one showcase due to the installation space and difficulty of securing equipment.

Looking at the actual usage situation, for example, cakes and cheeses, or meat products and dairy products are combined, and product comrades with originally different management conditions are displayed in the same showcase. Had a problem managing the product because it depended on the appearance of the product.

Therefore, it is desirable that the showcase is partitioned so that the cooling operation can be performed based on the management condition for each product.

Also, the cooling operation in the existing showcase is done by turning on the refrigerator.
-The operation with OFF control is repeated, and the air temperature range, which is the start / stop condition, is set to about 5 ° C.

On the other hand, the humidity varied around 20%, which was unsuitable as a control condition for cakes and cheeses.

In order to solve this, there is a showcase equipped with cooling coils at two locations, one above and one below, but this does not change to ON-OFF control even if the control temperature range can be made small, and temperature and humidity change over time. It changes greatly and is used by putting wraps on products.

In addition, since the refrigerant temperature in the conventional cooling device is designed to be about -10 ° C, water is iced on the coil surface, and there are large problems such as measures to protect the product from the defrost and changes in the environment due to its operation. .

Therefore, an object of the present invention is to provide a low-temperature and high-humidity showcase having a cooling system and a section in which various kinds of display can be set and various management conditions can be set.

(Means for Solving the Problem) The present invention takes the following means in order to achieve the above object.

That is, in a showcase having a built-in cooling coil, a partition for dividing the cooling coil and the inside of the showcase into several sections is provided, and each section is a low-temperature and high-humidity type showcase configured so that cooling air is divided and circulated. A dehumidifier and a humidifier are installed in each section, and a circulation fan is provided in each section to circulate air.

Then, in the refrigerant inlet pipe of the cooling coil, a liquid feed on-off valve and a liquid feed pump are provided, and a branch pipe from the refrigerant outlet pipe side is connected between the liquid feed on-off valve of the inlet pipe and the liquid feed pump. The liquid pump always sends a certain amount of refrigerant into the coil, and by detecting the temperature of the refrigerant and opening / closing the on-off valve, new low-temperature refrigerant is supplied only when the refrigerant temperature rises. .

As a result, the refrigerant temperature is set to a low temperature of 0 ° C. to 10 ° C. so that the water does not ice on the coil surface, and the cooling operation is performed, thereby making it possible to create a continuous environment in the showcase with time.

(Function) The present invention is provided with a partition for dividing the cooling coil and the showcase into several sections so that the cooling air is divided and circulated, and is suitable for products displayed in each room. Each room is divided into a humidification cooling section, a dehumidification cooling section, and a cooling section so that dairy products and cakes such as soft cheese that require humidity can be stored, and a dehumidification cooling section can contain hard cheese. Or packaged food is stored. Further, the cooling section can store containers, packages, fruits and the like.

(Example) Hereinafter, the Example shown in drawing is described.

(1) is a showcase, and (2) and (3) are a ceiling coil and an underfloor coil installed on the ceiling and underfloor in the showcase (1).

(4) and (5) are a refrigerant inlet pipe and a refrigerant outlet pipe connected to the refrigerator.

(4a) and (4b) are a refrigerant inlet pipe (4) and a refrigerant outlet pipe (5)
It is a branch pipe leading to.

Also, the above ceiling coil (2) and underfloor coil (3)
The inside of the showcase (1) cooled by the partition (6)
It is divided into a dehumidifying and cooling section (A), a humidifying and cooling section (B), and a cooling section (C) at (7).

The dehumidifying cooling section (A) is dehumidified by the dehumidifier (8),
The humidification cooling section (B) is adapted to be humidified by a humidifier (9).

The temperature inside the showcase is detected by the sensor (10), the temperature of the refrigerant is detected by the sensor (10 ') of the refrigerant inlet pipe (4), and the respective signals are sent to the controller (12) and the refrigerant inlet Each temperature is controlled by controlling a solenoid valve (13) which is an opening / closing valve of the pipe (4).

Reference numeral (17) is a branch pipe connecting the refrigerant inlet pipe (4) and the refrigerant outlet pipe (5), and is arranged between the pump (14) and the solenoid valve (13). In FIG. 1, (11) is a temperature indicator, (15) is a pressure gauge, and (16) is a manual valve.

As mentioned above, the showcase (1) has the partition (6).
It is partitioned by the dehumidification cooling section (A), the humidification cooling section (B), and the cooling section (C) in (7), and is cooled by the ceiling coil (2) and the underfloor coil (3) connected to the refrigerator (21), The dehumidifying and cooling section (A) can store hard cheese and packaged foods, and the humidifying and cooling section (B) can store dairy products such as soft cheese and cakes that require humidity. Further, the cooling section (C) can store containers, packages, fruits, etc., and even if products under different management conditions are stored in the same showcase, each section will be stored. Suitable management is performed.

The refrigerant constantly circulates in the coil during operation, and when the refrigerant temperature rises, the solenoid valve (13) opens and the low temperature refrigerant flows into the coil inlet pipe (4). The refrigerant having a high temperature flows from the branch pipe (17) of (5) to the refrigerant outlet pipe (5) without flowing into the inlet pipe (4). When the solenoid valve (13) is closed, the refrigerant on the outlet pipe line (5) side is the branch pipe (17) because of the pump (14).
To the inlet pipe (4) to form a circulation path.

That is, when the temperature in the showcase (1) is high, the refrigerant temperature is kept low and is supplied to the coil. However, when the temperature in the showcase becomes low, the refrigerant temperature does not rise.
The refrigerant forms a circulation path at the inlet and outlet through the coil branch pipe (17) to form a continuous cooling facility over time,
It becomes possible to maintain a constant temperature.

For this reason, the humidity can be adjusted easily because the humidity does not change due to the temperature change in the showcase (1) due to the start / stop of the cooling device.

At this time, the refrigerant temperature is 0 so that no icing occurs on the coil surface.
It is desirable to set the temperature above ℃.

A system in which the above system is incorporated in an actual showcase (1) will be described with reference to Figs. 3, 4, 5, and 6. Fig. 3 shows a refrigerator (21 adjacent to the dehumidifying and cooling section (A). ), The underfloor coil (3) is arranged between the floor (19) and the bottom wall (20) of the showcase (1) and is vertically partitioned (6) in the showcase (1). There is a partition. In the figure, (1a) shows the seller side containing glass, and (1b) shows the product entrance / exit side. Further, (22) is a water drop receiver of the coil.

FIG. 4 shows the dehumidifying and cooling section (A), which is a part of the ventilation path (where the underfloor coil (3) is located between the floor (19) and the bottom wall (20) separated by the partition (6). There is a dehumidifier (8) in 23).

(8a) shows a tank for receiving the water of the dehumidifier (8).

Further, there are doorways (23a) and (23b) before and after the air passage (23), and the air dehumidified and cooled by the fan (24) is circulated in the showcase (1).

FIG. 5 shows the humidification cooling section (B) of the part with the underfloor coil (3) between the floor (19) and the bottom wall (20) divided by the partitions (6) and (7). The steam outlet pipe of the humidifier (9) faces the air passage (25), and the air humidified and cooled by the fan (26) circulates in the showcase (1) through the entrances (25a) (25b).

FIG. 6 shows the cooling section (C) of the part with the underfloor coil (3) between the floor (19) and the bottom wall (20) separated by the partition (7) and the showcase wall. There is a fan (28) in the air passage (27), and the cooled air circulates in the showcase through the entrances (27a) (27b).

As described above, each section is partitioned from the showcase side, the cooling coil side, and the air flow path, and is designed so as not to interfere with each other.

Then, dampers may be provided at the outlets (23a) (25a) (27a) of the cooling air in the respective sections to make one driving device coaxial with the fan for circulating the air.

Although the cooling coils (2) and (3) may penetrate between the partitions (6) and (7) as described above, they are separately provided in each partition. In the coil (29) (30) (31) shown in, the refrigerant inlet pipe (29a) (30
The a) (31a) and the outlet pipes (29b) (30b) (31b) may be integrated by the headers (32) (33). Especially when the method of constantly circulating a certain amount of refrigerant is used, it is necessary to control the temperature of each section.
Figure design is preferred.

The humidifier and dehumidifier may have any structure,
As the humidifier (9), one utilizing the Peltier effect shown in FIGS. 7 and 8 is preferable.

Reference numeral (34) is an exterior plate of the humidifier, in which a heat dissipation part including a heat dissipation plate (36) on the heat dissipation side and a cooling plate (37) on the cooling side of the Peltier element (35) sandwiched by bakelite is installed. Yes, there is a water storage tank (38) in the heat sink (36). Therefore, when the Peltier element (35) is energized, the heat sink (36) heats the water storage tank (38) to generate steam, and the steam is dissipated from the discharge port (39) of the exterior plate (34). The air is sucked in from the intake port (40) by the fan (41) and the cooling plate (3
It is cooled in 7), and the steam, heating air, and cooling air are mixed and discharged from the blower duct (42) at the discharge port (39).

According to the above humidifier, water is heated and evaporated on the heat radiation side of the Peltier element (35), so that the required amount of heat can be applied without heating the air.

Further, since the air cooled on the cooling side of the Peltier element (35), the air on the heat radiating side and the steam are mixed and discharged, there is nothing that hinders the cooling as a total amount of heat.

Furthermore, since it is humidified by evaporation, the water particles are fine and can be used for foods and the like that do not like water drops.

The present invention is not limited to the above-described embodiments, but can be arbitrarily modified in design within the spirit of the present invention.

(Effect of the Invention) According to claim 1, the present invention is a low-temperature and high-humidity type showcase, in which a single showcase can simultaneously store products of different refrigeration management conditions in sections.

For example, in one showcase, products in different fields such as meat products and dairy products can be sorted and stored, and the efficiency of the store is improved.

In each section, the cooling temperature is stabilized by the circulation of cooling air, which keeps the temperature of the refrigerant circulating in the cooling coil constant and opens the liquid feeding on / off valve more than necessary to supply low temperature refrigerant. Therefore, the temperature range in the section can be continuously managed under a small condition.

In contrast to claim 2, in one showcase, since the cooling system forms the circulation path of the refrigerant by providing the circulation branch path, the cooling system is cooled except when the refrigerant temperature rises. The flow of air may be controlled by a circulation fan, and the temperature range can be made small and can be managed in such a manner that a certain condition is maintained.

When the temperature of the circulating refrigerant rises, a sensor opens the liquid supply on-off valve to supply low-temperature refrigerant, so the refrigerator operation should be controlled not by the ambient temperature in the showcase but by the refrigerant temperature. It suffices to control it, and it is efficient because it does not need to be started and stopped.

In particular, since one showcase is divided into sections, there are a section in which the cooling air is circulated and a section in which the cooling air is stopped due to the operation and stop of the circulation fan. The load of the refrigerator easily varies, but the operation of the refrigerator can be controlled by the temperature of the refrigerant by the method of circulating the refrigerant and supplying the required low temperature refrigerant regardless of the variation.

Compared to the conventional temperature control in the showcase by starting and stopping the refrigerator, there is no choice but to make a difference between the upper limit and the lower limit of the temperature, and the continuous circulation of the refrigerant reduces the fluctuation of the cooling state, Since it becomes easy to maintain and manage a constant temperature, it helps stabilize the product temperature and prevent quality deterioration.

This means that quality changes easily occur due to temperature fluctuations,
It is particularly suitable for dairy products in which constant temperature control is desired.

In any case, the present invention is a showcase that performs a cooling operation in a temperature range that maintains a humid environment, and the cooling temperature is small in order to maintain a humid environment that is created by a separately provided humidifier or dehumidifier. It is characterized in that it can be maintained and managed within a range.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a cooling system in a showcase of the present invention, FIG. 2 is an explanatory view showing a different cooling system in the showcase of the present invention, FIG. 3 is a sectional view of a refrigerator arrangement portion of the showcase, and FIG. The figure shows a cross section of the dehumidifying and cooling section of the showcase, Fig. 5 shows the cross section of the humidifying and cooling section of the showcase, Fig. 6 shows the cross section of the cooling section of the showcase, and Fig. 7 shows the slope of the humidifier. FIG. 8 is a half sectional view of the above. (1) …… Showcase (2) …… Ceiling coil (3) …… Underfloor coil (4) …… Refrigerant inlet pipe (5) …… Refrigerant outlet pipe (6) (7) …… Partition (8)… Dehumidifier (9) Humidifier (10) Sensor (12) Controller (13) Solenoid valve (14) Pump (16) Manual valve (17) Branch pipe

Continuation of the front page (56) Reference JP-A-62-210374 (JP, A) Actually open 53-55865 (JP, U) Actually open 54-97848 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A showcase with a built-in cooling coil is provided with a partition that divides the cooling coil and the inside of the showcase into several sections, and each section has a circulation fan installed for each section so that cooling air circulates. A dehumidifier or humidifier is provided for each different section, and a pipe for circulating the refrigerant in the cooling coil is provided.At a low temperature, the circulation of the refrigerant is continued in the pipe to keep the temperature of the refrigerant. When the temperature rises, the liquid supply on-off valve is opened to supply the low temperature refrigerant, and the low temperature refrigerant is constantly passed through the cooling coil during the cooling operation. Case. 2. A liquid delivery on-off valve and a liquid delivery pump are provided on the side of the refrigerant inlet pipe of the cooling coil, and a branch pipe for circulation from the side of the refrigerant outlet line is provided with the liquid delivery on-off valve and the liquid delivery of the inlet pipe. In addition to being connected to the pump, a sensor for detecting the refrigerant temperature is connected to the liquid supply on-off valve via a controller, and the liquid circulation pump circulates the refrigerant in the cooling coil via the branch pipe. The low-temperature and high-humidity showcase according to claim 1, wherein the sensor opens the liquid supply on-off valve to supply a new low-temperature refrigerant only when the refrigerant temperature rises.