JPS6277585A - Showcase - 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 [Technical Field of the Invention] The present invention relates to an improvement in a showcase that can be switched to a refrigerated state in which a product storage chamber is used as a refrigerating room or a hot storage state in which it is used as a hot storage room.

(Technical Background of the Invention) Conventionally, showcases have been developed that can be switched to a refrigerated state in which the product storage chamber of the showcase body is used as a refrigerating room or a hot storage state in which it is used as a greenhouse. 6 and 7 show the appearance of this type of showcase, and 1 is the showcase body.The showcase body 1 has a product storage chamber 2 formed in its upper part.This product Transparent glass walls 3 are attached to the front, rear, and both sides of the product storage chamber 2, respectively.Furthermore, doors 4.4 are attached to the front and rear surfaces of the product storage chamber 2, respectively. .

Further, the showcase body 1 is provided with a machine room 5 below the product storage chamber 2. In this case, a ventilation duct 6 communicating with the product storage chamber 2 is disposed within the machine room 5.

Further, within this ventilation duct 6, an evaporator 7 and an indoor fan 8 of a refrigeration cycle are respectively arranged. Also, inside the machine room 5 is a refrigeration cycle compressor 9. Condenser 10
9. Various components such as an expansion valve and an outdoor fan 11 (not shown) are provided.

On the other hand, inside the product storage chamber 2 there is a bottom shelf board 1 for placing products.
2 and an intermediate shelf board 13 are respectively arranged. In this case, the bottom shelf board 12 and the intermediate shelf board 13 are formed by plate heaters in which a cord heater 15 is attached to the back surface of a highly thermally conductive metal plate 14, as shown in FIG. The refrigeration cycle is maintained in a driving state, and the cord heaters 15 on the bottom shelf board 12 and the intermediate shelf board 13 are
When the electricity is kept cut off, the air flowing inside the ventilation duct 6 is cooled by the evaporator 7 of the refrigeration cycle, and cold air is blown from inside the ventilation duct 6 to the product storage chamber 2 side, and the inside of the product storage chamber 2 is cooled. It is kept in a refrigerated state and used as a refrigerating room.

In addition, the refrigeration cycle is switched to the drive stop state, and the cord heaters 15 of the bottom shelf board 12 and the intermediate shelf board 13 are
When each is switched to the energized state, the blowing of cold air from inside the ventilation duct 6 to the product storage chamber 2 side is stopped, and the bottom shelf board 12 and the intermediate shelf board 13 are heated by the cord heater 15.
By heating the metal plate 14, it is possible to switch to a hot storage state in which the interior of the product storage chamber 2 is used as a hot storage room.

[Problems with background technology]

In the case of the conventional structure, when switching to a hot storage state in which the inside of the product storage chamber 2 is used as a hot storage room, the metal plates 14 of the bottom shelf board 12 and the middle shelf board 13 are heated by the cord heater 15 of the plate heater. Since the configuration was such that heated products placed on the bottom shelf board 12 and the intermediate shelf board 13, such as hot beverages such as canned coffee, were directly heated, the bottom side of the heated product was placed on the top side. There was a problem in that the product warmed up earlier than the previous one, and it took time for the entire heated product to warm up.

In addition, during warming, the temperature distribution of each warmed product tends to become uneven, so there is a risk that each warmed product may be locally heated to a high temperature. There is a problem in that the flavor of the drink contents is easily spoiled, and there is also a risk of getting burned if you touch the high-temperature heating part of each warmed product.

[Purpose of the invention]

This invention can shorten the time required for the entire warmed product to warm up when the product storage room is switched to a hot storage state where it is used as a greenhouse, and the temperature distribution of each warmed product during warming can be reduced. To provide a showcase that can uniformize the condition and prevent the flavor of a hot beverage from being spoiled and the occurrence of burns, and can also prevent the occurrence of a fire during warming. The purpose is to

[Summary of the invention]

This invention consists of a ventilation duct that communicates with the product storage chamber in the showcase body, an evaporator for the refrigeration cycle disposed within the ventilation duct, a 4S heater installed in the evaporator, and a refrigeration cycle. A cold air/warm air changeover switch that switches between a refrigeration state in which cold air is supplied from the ventilation duct into the product storage chamber as a drive state and a warm storage state in which the refrigeration cycle is stopped and hot air is supplied from the ventilation duct into the product storage chamber. and a support member that supports the evaporator in a spaced manner with respect to each wall surface component of the ventilation duct.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 shows a schematic structure of the entire showcase, and 21 is the main body of the showcase. This showcase body 21 has a product storage chamber 22 formed in its upper part. Transparent glass walls 23 are attached to the front, rear, and both sides of the product storage chamber 22, respectively. Further, the showcase body 21 is provided with a machine room 24 below the product storage chamber 22.

A ventilation duct 25 communicating with the product storage chamber 22 is disposed within the machine room 24. Each wall component 26 of this ventilation duct 25 is made of a heat insulating material. Furthermore, an evaporator 27 and an indoor fan 28 of a refrigeration cycle are respectively disposed within the ventilation duct 25. As shown in FIGS. 2 and 3, this evaporator 27 is a finned tube type evaporator equipped with a large number of fins 27a and refrigerant pipes 27b inserted through the fins 27a. It is formed by a heat exchanger. Furthermore, semicircular notches for defrosting heaters are formed at the upper and lower ends of the fins 27a of the evaporator 27, and heaters 29 and 29 are fitted into these notches, respectively. It is installed as is. These heaters 29, 29 are inserted insulated into protective tubes 30, 30, respectively. Additionally, metal fittings 31 are attached to both sides of the evaporator 27. The evaporator 27 is supported at a distance from each wall component 26 of the ventilation duct 25 via a support member 32. In this case, the support member 32 is formed by a metal wall installed between the wall structure members 26 and 26 forming both side walls of the ventilation duct 25, and the support member 32 is attached to the support member 32 through the metal fittings 31... The evaporator 27 is attached in a suspended state, and gaps are formed between the outer circumferential surface of the evaporator 27 and each wall component 26 of the ventilation duct 25. In this case, the evaporator 27
The distance between the bottom portion 27c of the ventilation duct 25 and the wall component 26a forming the floor surface of the ventilation duct 25 is set to about 10+na+. Further, the indoor fan 28 is mounted inside the ventilation duct 25 and is attached to a plate 33. Also, on the outside of the ventilation duct 25 in the machine room 24, a refrigeration cycle compressor (not shown) and a condenser 341 are provided.
Various components such as an expansion valve and an outdoor fan 35 (not shown) are provided. In addition, the bottom floor surface 2 of the ventilation duct 25
6b is formed with a drain water hole 26c.

On the other hand, inside the product storage chamber 22, a bottom shelf board 36 and an intermediate shelf board 37 for placing products are respectively arranged. In this case, the bottom shelf board 36 and the intermediate shelf board 37 are formed by plate heaters in which cord heaters 36b, 37b are attached to the back surfaces of highly thermally conductive metal plates 36a, 37a.

FIG. 4 shows the electric circuit inside the showcase main body 21, where 38 is a power source, 39a and 39b are power switches, and 40 is an electric circuit. i, power switch 39a for 3g
, 39b is the fan motor of the indoor fan 28 connected through. Furthermore, the power supply 38 includes a power switch 39a.
, 39b, and a parallel circuit of the compressor motor 42 of the refrigeration cycle and the fan motor 43 of the outdoor fan 35 are connected through the cold air side contacts (41 cm 41 a) of the cold air/warm air changeover switch 41, respectively. In addition, the power supply 38 includes power switches 39a and 39b, a cold air/hot air changeover switch 4
A parallel circuit of the heater 29 and the cord heaters 36b and 37b is connected through one hot air side contact (41 cm 41b), respectively.

Then, the power switches 39a and 39b are turned on, and the cold air side contact of the cold air/hot air changeover switch 41 (
41cm41a) is connected, the refrigeration cycle is driven. In this case, the heater 29 of the evaporator 27. Since the hood heater 36b on the bottom shelf board 36 and the cord heater 37b on the middle shelf board 37 are kept de-energized, the air flowing through the ventilation duct 25 is kept at -10°C, for example.
The product is cooled by the evaporator 27 of the refrigeration cycle, which has a temperature of about 50°F, and blows cold air from inside the ventilation duct 25 toward the product storage chamber 22, and is used as a refrigerating room that maintains the inside of the product storage chamber 22 at a temperature of, for example, 5° C. or lower. be able to.

Also, turn on the power switches 39a and 39b, and also turn on the hot air side contact (4) of the cold air/hot air changeover switch 41.
1cm41b) is connected, the refrigeration cycle is switched to a drive stop state, and the heater 29. of the evaporator 27 is connected. The cord heater 36b of the bottom shelf board 36 and the cord heater 37b of the intermediate shelf board 37 are switched to the energized state. Therefore, in this case, the heater 29
The fins 27a of the evaporator 27 are heated by heating the fins 27a of the evaporator 27 to raise the temperature of the evaporator 27 to, for example, 65° C. or higher, and the high-temperature evaporator 27 heats the air flowing inside the ventilation duct 25, thereby increasing the temperature of the evaporator 27. Product storage room 2 from inside 25
Hot air can be blown out to the second side, and the cord heaters 36b and 37b can blow out the metal t! 1236a and 37a can be heated to be used as a hot storage room in which the warmed products in the product storage chamber 22 are maintained at a temperature of, for example, about 55°C.

Therefore, in the case of the above structure, when the inside of the product storage chamber 22 is used as a greenhouse, the cord heaters 36b, 3
7b heats the metal plates 36a and 37a of the bottom shelf board 36 and the middle side board 37, and directly heats the heated products placed on the bottom shelf board 36 and the middle shelf board 37, such as hot beverages such as canned coffee. In addition to being able to heat the product, warm air blown from inside the ventilation duct 25 toward the product storage chamber 22 can be blown onto each of the stored products, and each of the products can be heated by the heat of the warm air. Therefore, it is possible to prevent the bottom side of the warmed product from heating up before the top side as in the past, and each warmed product can be heated approximately evenly, so it takes less time for the whole warmed product to warm up. The time required can be reduced compared to the conventional method. Furthermore, during warming, it is possible to completely prevent the temperature distribution of each warmed product from becoming uneven and prevent each warmed product from being locally heated to a high temperature state, so that the contents of the warmed product can be heated. It is possible to prevent the flavor from being spoiled, and also to reduce the risk of burns.

In addition, a support member 32 formed of a metal plate is provided between the wall structure members 26 and 26 forming both side walls of the ventilation duct 25, and a metal fitting 31 is attached to the support member 32.
The evaporator 27 is installed in a suspended state through the outer peripheral surface of the evaporator 27 and each wall component 26 of the ventilation duct 25.
Since gaps are formed between the product storage chamber 22 and the product storage chamber 22, each wall component 26 of the ventilation duct 25 is prevented from being overheated by the heat of the evaporator 27 when the interior of the product storage chamber 22 is used as a greenhouse. This can prevent fires from occurring during storage. Furthermore, when using the inside of the product storage chamber 22 as a greenhouse, cord heaters 36b and 37b are provided.
Since the heating input can be divided into the side and the heater 29 (warm air) side, the heating temperature of the evaporator 27 can be relatively adjusted without significantly impairing the heating effect of the products stored in the product storage chamber 22. can be kept low. Therefore, it is possible to more reliably prevent each wall surface component 26 of the ventilation duct 25 from being overheated by the heat of the evaporator 27, thereby increasing the effect of preventing fire outbreaks in the 1111 warehouse and improving safety. In addition, since there is no need to particularly increase the heat resistance and temperature strength of each component installed around the ventilation duct 25, the structure can be simplified and costs can be reduced. In addition, the bottom 27c of the evaporator 27 and the ventilation duct 2
Since the distance between the wall surface component 26a forming the floor surface of 5 is set to around 10 m11, 1 flE of air flowing through the ventilation duct 25 flows out without passing through the evaporator 27. This can be prevented, and the heat exchange efficiency can also be improved.

Note that this invention is not limited to the above embodiments. For example, as shown in FIG. 5, each wall component 26 of the ventilation duct I/25 may be formed by attaching a flame retardant part 52 such as a metal plate to the surface of a heat insulating material 51. In this case, the heat insulating effect of each wall surface 1ii forming member 26 of the ventilation duct 25 can be further enhanced. Furthermore, it goes without saying that various other modifications can be made without departing from the gist of the invention.

〔Effect of the invention〕

According to this invention, a ventilation duct is provided that communicates with the product storage chamber in the showcase body, and a heater is attached to the evaporator of the refrigeration cycle disposed in the ventilation duct, and a cold air/warm air selection switch is operated. It is possible to switch between a refrigeration state in which the refrigeration cycle is in a driving state and cold air is supplied from the ventilation duct into the product storage chamber, and a heating state in which the refrigeration cycle is in a drive stopped state and warm air is supplied from the ventilation duct into the product storage chamber. At the same time, since support members for supporting the evaporator in a spaced manner are provided for each wall component of the ventilation duct, when the product storage chamber is switched to a hot storage state in which the product storage room is used as a greenhouse, the warmed products Not only can you shorten the time it takes for the entire food to warm up, but it can also reduce the amount of time it takes for each i! By making the distribution of 7111 degrees uniform in stored products, it is possible to prevent the flavor of the contents of warmed products from being spoiled and the occurrence of burns, and in addition, it is possible to prevent the occurrence of fires during warming. .

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention.
Figure 1 is a longitudinal sectional view showing the schematic structure of the entire showcase;
Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a perspective view of the main parts showing how the evaporator is installed, and Fig. 4 is a schematic configuration diagram showing the electric circuit inside the showcase body. Fig. 5 is a vertical sectional view of the main part showing another embodiment, Figs. 6 to 8 show the conventional example, Fig. 6 is a front view showing the appearance of the entire showcase, and Fig. 7 is The same side view and FIG. 8 are perspective views showing the plate heater. 21... Showcase body, 22... Product storage chamber,
25... Ventilation duct, 26... Wall surface component, 27
... Evaporator, 29... Heater, 32... Support member, 41... Cold air/hot air selection switch. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Leap 3 Lo Figure 5

Claims (2)

[Claims] (1) A ventilation duct that communicates with the product storage chamber in the showcase body, a refrigeration cycle evaporator installed in the ventilation duct, and a heater attached to the evaporator;
Cold air and hot air are switched between a refrigeration state in which the refrigeration cycle is in a driving state and cold air is supplied from the ventilation duct into the product storage chamber, and a heating state in which the refrigeration cycle is in a drive stopped state and warm air is supplied from the ventilation duct into the product storage chamber. A showcase comprising: a wind selector switch; and a support member that supports the evaporator in a spaced manner from each wall component of the ventilation duct. (2) The showcase according to claim (1), wherein each wall component of the ventilation duct is made of a heat insulating material with a flame retardant material attached to the surface thereof.