JPS6044786A - Refrigerated counter with door - 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 to which the invention pertains] The present invention relates to a refrigerated showcase with a door for freezing and refrigerating specifications, which is called a so-called reach-in type showcase.

[Prior art and its problems]

Recently, in the cold chain industry, the above-mentioned showcases with doors have become widespread as energy-saving oriented products. By the way, the front air curtain blowing method and the back blowing method 1 to 1 are known as methods for blowing cold air into the interior of this keyaki door showcase. this house,
The former air curtain blowout method opens the cold air curtain blowout and suction ports of the cold air circulation duct above and below the front door of the see-through glass toward the internal product display room, and uses heat exchange with the cooler. Blows out chilled air to form a cold air curtain along the door surface. On the other hand, in the latter rear air blowing method, a large number of cold air blowing holes are opened in the back partition wall of the internal product display room, and the air is cooled by a back air blowing duct cooler defined behind the partition wall. It guides the cold air and blows it out at a gentle wind speed from behind toward the inside of the refrigerator.

Comparing the above-mentioned methods, we find that compared to the air curtain blowout method, the pull-down characteristics in the trench where products are cooled after entering cold storage operation are superior to the air curtain blowout method.
The rear blowing method is better because the cold air hits the product directly. On the other hand, if we consider the state where the door is open to take in and take out products, with the back blowing method, most of the cold air leaks out of the cabinet from the open front part of the cabinet [-19
Therefore, there is a large amount of heat loss, and there is also a lot of outside air heat entering the refrigerator.However, with the air curtain blowing method, air is blown out at the front of the inside of the refrigerator (the air curtain that is formed prevents outside air from entering, so there is no heat loss and outside air heat enters the refrigerator). Furthermore, the door's see-through glass door is susceptible to condensation because the inside part (1) of the refrigerator comes into contact with cold air and is cooled, so to prevent this condensation, glass doors are generally equipped with a barrier. A dew heater is provided.In this case, the air curtain blowout method allows more cold air to pass through the glass door surface than the back blowout method, so an anti-dew heater with a correspondingly larger heater capacity is required.

[The first feature of the generation ψ] This invention takes into consideration the characteristics of each of the cold air blowing methods described above, and also has excellent pull-down performance, suppresses the intrusion of outside heat when the door is opened, and has an anti-condensation heater on the door. The purpose is to provide a refrigerated showcase with a door that has high cold storage performance and is an energy-saving type that requires only a small capacity.

[Key points of the invention]

In order to achieve the above object, the present invention has a cold air curtain outlet and a suction port in the front part of the refrigerator so as to harmonize the light-irradiated air curtain blowout method and the rear blowout method.
By constructing a rear blowout duct for cold air on the back side of the refrigerator, and providing a damper mechanism at the cold air force/temperature outlet to open and close the air curtain outlet in conjunction with opening and closing of the door, When the folding screen is closed, cold air is blown into the cabinet using the back blowing method 11, while when the door is opened 1-2, the system switches to the air curtain blowing method and blows out an air curtain at the front of the cabinet to prevent open air from entering. Formation 17, configurations 1 to 1 are designed to take advantage of the features of both blowing systems.

[Embodiments of the invention]

1 to 5 show embodiments of the present invention, and in the figures, 1 is an outer box of a showcase cabinet;
2 is an inner box, 3 is a product display shelf of an internal product display room defined in the inner box, and 4 is a front door of the cabinet. Here, a cold air circulation duct 5 is formed between the outer box 1 and the inner box 2, and a cooler 6 and a fan 7 are housed therein. The cold air circulation duct 5 opens at the top and bottom of the front side of the refrigerator interior to form a cold air curtain outlet 8 and a cold air suction port 9, and further branches from the outlet side of the cooler 6 to reach the rear surface of the refrigerator interior. A back air duct 10 is formed between them. Reference numeral 11 denotes a partition wall of the rear blow-off duct 10, and a large number of cold air blow-off holes 12 are formed as punched holes distributed over the entire surface of the partition wall toward the interior of the refrigerator. In addition to the above configuration, a damper mechanism 13 is disposed at the cold air curtain outlet 8. As shown in FIG. 3, the damper mechanism 13 includes a damper body 14 that is slidably supported in the front and rear directions of the outer box 1 via a support pin 16 that fits in a long hole 15, and 15 to move it forward.

The damper body 5-14 has a tongue piece 18 projecting toward the door 4 at the front of the damper body 5-14.

In the damper mechanism 13 described above, when the lever 4 is closed, the door 4 hits the tongue piece 18 of the damper body 14, and the damper body 14 moves toward the cherry blossoms against the Vr tension 17 as shown in FIG. , the cold air curtain outlet 8 is closed. On the other hand, when the door 4 is opened, the damper body 14 is no longer restrained by the door 4, and the damper body 14 moves forward as shown in FIG. 5 due to the spring bias. and opens the cold air curtain outlet 8.

Next, the blowing of cold air inside the refrigerator when the door 4 is opened and closed will be described.

First, when the door 4 is open as shown in FIGS. 1 and 5, the damper mechanism 13 is opened and the cold air blown through the cold air circulation duct 5 is directed through the cold air curtain outlet 8 as shown by arrow A. A hot air curtain is blown into the front opening of the cabinet to block the intrusion of outside air. On the other hand, when the door 4 is closed, the damper mechanism 13 operates at the cold air curtain outlet 8 as shown in FIGS. 1 and 4.
Therefore, the cold air flowing through the cold air circulation duct 6-5 changes direction to the rear blowing duct 10 when it exits the cooler 6, passes through the inside of the duct, and enters the refrigerator. from here to the cold air outlet 12 of the partition wall 11.
Air blows out from the back toward the inside of the refrigerator as shown by arrow B 12.
, the products displayed in the warehouse are washed away. In each of the cases shown in FIGS. 1 and 2, the cold air flowing through the refrigerator 1, 7 is recovered through the cold air suction port 9 and returned to the cold air circulation duct 5.

〔Effect of the invention〕

As described above, according to the present invention, the cold air circulation duct in which the cooler and the fan are arranged has a cold air curtain outlet opened at a part of the inside of the folding screen on one side, and a cold air curtain outlet in the inside of the refrigerator on the other side. By branching and communicating with the back air outlet duct formed at the back of the product display room 11, and by providing the cold air curtain outlet with a tamper mechanism that opens and closes in conjunction with the opening and closing of the boat, When the door is closed, the rear blowing system improves the pull-down characteristics and product temperature characteristics, while when the door is opened to load or unload products, it automatically switches to the air curtain blowing system. Heat loss can be suppressed by blocking outside air from entering through the open front surface of the cabinet, and since the amount of cold air flowing along the door surface is small during normal operation with the door closed, the fog-proof heater on the door is We can provide a refrigerated showcase with a door that has excellent cold storage performance as an energy-saving type that requires only a small-capacity heater.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, and FIGS. 1 and 2 are cross-sectional views of the entire showcase showing the flow path of cold air inside the refrigerator when the door is open and closed, respectively. Transverse plan views of Figures 1 and 2, Figures 4 and 5
The figure shows the M9 configuration of the damper mechanism showing the operation when closing and opening the fidget door. 1...Outer box of cabinet, 2...Inner box, 4...Door, 5...Cold air circulation tact, 6...Cooling Container, 7...Fan, 8.
...Cold air curtain outlet, 9...Cold air suction port, 10...Back air outlet duct, 13...
...Tamper mechanism, 14...Tamper body, 1
79- Figure 1 Figure 1 Figure B Figure 5

Claims (1)

[Claims] 1) A cold air circulation duct is formed between the inner box and the outer box of the cabinet of the showcase with a door, with cold air curtain outlets and suction ports opening at the top and bottom of the front side toward the inside of the refrigerator, and cooling is carried out here. In addition to accommodating the cold air circulation duct, a rear blowout duct is formed that branches from the cold air circulation duct [7] and reaches the back of the product display room in the warehouse. A refrigerated showcase with a door, characterized in that a damper mechanism is provided that closes the air outlet and operates in conjunction with the door to open the cold air outlet when the door is opened.