JP2013194987A - Cold air circulation type doored freezing and refrigerating showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance energy-saving effects by changing opening patterns of cold air blowoff holes which are bored in a back panel in a box of a showcase and blow cold air from a halfway part of a cold air circulation duct toward the front in the box, and thereby, by effectively eliminating frosting caused in the box by intrusion of outside air without using a dew/frost preventing heater.SOLUTION: There is provided a cold air circulation type doored freezing and refrigerating showcase that has display shelves 8 of upper and lower stages installed in a box of a doored case body 1, and sends cold air into the box by circulation through a cold air circulation duct to keep articles 10 cold, wherein a cold air curtain is blown out to the front in the box through the cold air circulation duct, and cold air blowoff holes for blowing the cold air out to the front in the box from a halfway part of the cold air circulation duct are bored in a back panel 4 in the box corresponding to the display shelves 8 of the respective stages. In addition to cold air blowoff ports 4a of a first pattern arrayed in a right-and-left direction corresponding to the display shelves 8 of the respective stages to a wall surface of the back panel 4, cold air blowoff ports 4b of a second pattern arrayed in a vertical direction are provided together having opening positions matched with both right-and-left sides of the display shelves, and the cold air is supplied evenly to a frost layer formed in the box to efficiently eliminate frosting.

Description

  The present invention constructs product display shelves lined up and down in the cabinet of the case body with a front door, forms a cold air curtain on the front side of the cabinet through the cold air circulation duct, and also from the back side of the cabinet to the front of the cabinet The present invention relates to a frozen / refrigerated case with a cold air circulation type door that keeps goods such as frozen foods by blowing cold air toward them.

  As a refrigerated / refrigerated showcase with doors (reach-in type showcase), the product display shelves lined up and down are erected in the cabinet of the case body with the door on the front, and cold air is circulated through the cool air circulation duct on the front of the cabinet. A showcase is known in which an air curtain is blown out and cold air is blown out from the back side toward the front of the interior to keep the interior cool (see, for example, Patent Document 1). Shown in

  In FIG. 3, 1 is an open front case body that becomes a heat-insulating housing, 2 is a door (transparent door) provided on the front surface of the case body 1, and 3 is a space between the outer box and the inner box of the case body 1. The formed cool air circulation duct 4 is a rear panel for partitioning the inside box storage chamber 5 and the cool air circulation duct 3, 6 is a cooler disposed at the bottom of the case body 1, 7 is a fan, and 8 is an upper and lower stage. Product display shelves that are arranged in the cabinet, and are arranged on the wall surface of the back panel 4 from the halfway path of the cold air circulation duct 3 to the display chamber 5 in the cabinet corresponding to the display shelves 8 of the upper and lower stages. A cold air blowing hole 4a for blowing out cold air forward is opened. As described in Patent Document 1, the cold air blowing holes 4a are slit-shaped square holes that are distributed in the left-right direction with the opening positions aligned below the display shelves 8 of the upper and lower stages. is there. In addition, the code | symbol 9 in a figure is a fluorescent lamp for interior lighting.

  The cold-reserving operation of the above-described cold-air circulation type showcase is well known, and the cold-air exchanged with the cooler 6 passes through the cold-air circulation duct 3 in the case body 1 as shown by the arrows in FIG. A cold air curtain airflow A is blown out from the air curtain outlet 3a opened in the ceiling toward the lower suction port 3b along the inner surface of the door 2 on the front surface of the interior. Further, the cold shelf B is blown out from the midway path of the cold air circulation duct 3 through the cold air blowing holes 4a formed in the back panel 4 corresponding to the commodity display shelves 8 arranged in the upper and lower stages. Keep the goods (not shown) displayed in

JP-A-10-73361

  By the way, in the above-described showcase with a cold air circulation type door, in particular, a freezer-type showcase that keeps frozen food cold, the door 2 is opened and closed in order to take out the product from the inside during the cold-keeping operation, and the outside air enters the inside. There is a problem that frost forms on the ceiling surface, the side wall surface, the lower surface of the display shelf 8, the surface of the product mounted on the display shelf 8, and the like due to the intrusion of the outside air.

  That is, when the door 2 (see FIG. 3) is opened in the cool operation state of the showcase, as shown in FIG. 4, the cool air in the cabinet leaks from the lower region of the display chamber 5 to the outside of the cabinet, while from the outside of the cabinet. Will invade outside air toward the upper area of the chamber. In this case, when the outside air enters the upper area in the warehouse, the cold air curtain airflow A and the cold airflow B (see FIG. 3) blown forward from the back of the inside interfere with (impact) the flow of the intruding outside air. A turbulent flow (vortex) is generated in the lever portion, and a part of the outside air that has entered the interior flows from the front area of the interior toward the back of the display room 5 that is in a cold state.

  For this reason, when the inside temperature is kept at a minus temperature of 0 ° C. or lower as in a refrigeration specification showcase, moisture (water vapor) contained in the outside air sublimates and solidifies, and the inside of the display room 5 Frost is formed on the wall surface, the lower surface of the display shelf 8, the surface of the product mounted on the display shelf 8, and the like. In addition, when the door 2 of the showcase is closed and no outside air enters, the cold air flow B (see FIG. 3) blown out from the back side in the warehouse flows along the surface of the frosted frost layer, thereby sublimating the frost. Although it gradually evaporates and disappears, if the door 2 is frequently opened and closed, the amount of frost generated at each part in the cabinet increases, and the frost cannot be sufficiently eliminated. In particular, as shown in FIG. 3, in the conventional structure in which the cold air blowing holes 4a opened in the back panel 4 are distributed and opened in the left and right direction on the lower surface side in accordance with the display shelves 8 arranged in the upper and lower stages, the cold air blowing holes 4a in the back panel 4 are provided. Since the cold air flow B that blows out forward through the interior flows through the area along the lower surface of the display shelf, the amount of the cold air flowing along the side wall surface of the inner box and the peripheral surface of the product is not sufficient. The frost that has formed on the lever remains without disappearing.

  In addition, it is conceivable that a large number of the cold air blowing holes 4a are dispersed and opened over the entire area of the back panel 4 to increase the air volume of the cold air flow B blown forward through the cold air blowing holes. Out of the total amount of air blown, the amount of air flow diverted from the middle of the cold air circulation duct 3 toward the inside of the chamber is increased by the amount blown from the cold air outlet 3a of the cold air circulation duct 3 toward the suction port 3b. Since the amount of air curtain airflow A is reduced and the function of the air curtain is reduced, the amount of outside air intrusion when the door 2 is opened increases, and the amount of frost formation in the cabinet further increases.

  Therefore, in conventional showcases, a dew-proof / frost-proof heater is installed on the inner wall of the inner box to prevent condensation and frost formation. In addition to an increase in power consumption, there is a problem that the heat generated by the heater directly becomes a heat load on the showcase and the burden on the refrigerator increases.

  The present invention has been made in view of the above points, and by appropriately changing the opening pattern of the cold air blowing holes opened in the back panel in the warehouse, it is possible to prevent intrusion of outside air without using a dew-proof and frost-proof heater. An object of the present invention is to provide a cold air circulation type refrigerated / refrigerated showcase with an improved door so as to effectively eliminate frosting caused in the interior.

In order to achieve the above object, according to the present invention, a display shelf lined up and down in a case body having a door on the front surface is erected, and the cool air defined between the inner box / outer box of the case body is formed. A refrigeration / refrigeration showcase with a cold air circulation door that cools and cools the display products by circulating cold air into the cabinet through the circulation duct, and blows out a cold air curtain to the front of the chamber through the cold air circulation duct. In the back panel, in correspondence with the upper and lower display shelves, a cold air outlet hole for blowing out cold air from the middle path of the cold air duct toward the front of the interior of the duct is provided.
The rear panel has upper and lower display shelves, a first pattern cold air outlet arranged in the left-right direction with the opening position aligned with the lower surface side of the interior ceiling, and the opening positions on the left and right sides of the display shelf. Then, a second pattern of cold air outlets arranged in the vertical direction is formed.

  Further, as a preferred mode of the above configuration, the cold air outlets of the second pattern opened in the rear panel are drilled limited to the display shelves arranged on the upper side except for the display shelves arranged on the lower side in the warehouse ( Claim 2).

  Moreover, as a preferable aspect of the above-described configuration, the cold air outlets of the first pattern are drilled limited to the display shelves arranged on the upper side except for the display shelves arranged on the lower side in the warehouse (Claim 3).

  As described above, in the back panel in the cabinet, in addition to the first pattern of cold air blowing holes opened as in the prior art, the second pattern of cold air blowing holes arranged vertically on the left and right sides of the display shelf When the showcase is kept cold, the cold airflow that blows out from the middle of the cold air circulation duct toward the front of the interior through the cold air blowing holes of the first and second patterns is kept at each stage. It flows evenly along the rear surface of the display shelf, the inner wall surface of the inner box, the ceiling surface, and the surface of the product. As a result, it is possible to efficiently sublimate and evaporate the frost that has formed on each part of the interior by the outside air that enters the interior from the front as the door is opened during the cold insulation operation, and the frost layer can be eliminated evenly and reliably. In addition, unlike the conventional showcase, no dew-proof and frost-proof heater is used, so a high energy saving effect can be obtained.

  Further, by drilling the cold air outlet of the first pattern or the cold air outlet of the second pattern in a range limited to the display shelves arranged on the upper side excluding the display shelves arranged on the lower side of the cabinet. The air flow of the air curtain airflow that is blown out to the front of the interior through the cool air outlet (ceiling side) of the cool air circulation duct increases, and the outside air that flows into the upper area (upper side) from outside the compartment when the door is opened. The amount of frost generated in the warehouse can be more effectively reduced by suppressing the intrusion amount.

It is a model front view showing the opening pattern of the cold air blowing hole drilled in the back panel in the store | warehouse | chamber concerning Example 1 of this invention. It is a model front view showing the opening pattern of the cold air blowing hole drilled in the back panel in the store | warehouse | chamber concerning Example 2 of this invention. It is a composition sectional view of the conventional cold air circulation type showcase with a door. It is a figure showing the external air intrusion which arises when the door of FIG. 3 opens, and the cold air leak from the inside.

  Hereinafter, embodiments of the present invention will be described based on the examples shown in FIGS. 1 and 2. In the drawing of the illustrated embodiment, parts corresponding to those in FIG.

  In the embodiment shown in FIG. 1, with respect to the display shelf 8 arranged in the upper and lower stages and erected in the display room 5 in the warehouse, the wall of the back panel 4 described in FIG. The first pattern of cool air outlets 4a distributed in the left-right direction with the opening position aligned with the lower surface side of the shelf 8 and the ceiling in the cabinet, and the opening position aligned with the left and right sides of the display shelf 8 are distributed in the vertical direction A cold air outlet 4b of the second pattern is opened side by side.

  And at the time of the cool operation of the showcase, the cold air is blown out from the cold air circulation duct 3 (see FIG. 3) defined behind the cold air blowing holes 4a and 4b of the first and second patterns toward the front of the interior, On the ceiling surface of the inner box of the case body 1, the left and right side wall surfaces, the lower surface of each display shelf 8 arranged in the upper and lower stages, and the surface of the product 10 (frozen food such as ice cream) mounted on the display shelf 8 The cold air is made to flow evenly along.

  As a result, as shown in FIG. 4, the humidity of the outside air entering the upper area of the cabinet as the door 2 (see FIG. 3) arranged on the front surface of the case body 1 is opened and closed during the cool operation of the showcase. As a result, the frost layer that has formed frost on each part in the chamber can be sublimated and evaporated uniformly, and the frost formation can be reliably eliminated.

  Next, an embodiment corresponding to claim 2 of the present invention will be described with reference to FIG. In this embodiment, the first pattern cold air outlet holes 4a and the second pattern cold air outlet holes 4b described in the first embodiment are arranged on the upper side of the display chamber 5 as shown in the figure. The first pattern cold air outlet holes 4a and the second pattern cold air outlet holes 4b corresponding to the display shelves 8 arranged on the lower side of the display chamber 5 are opened. Keep it closed without setting up.

  Accordingly, the cold air blows forward through the first and second patterns of the cold air blowing holes 4a and 4b opened in the rear panel 4 on the upper and left and right side areas of the display shelf 8 arranged on the upper side of the cabinet. In the lower area in the cabinet in which the display shelves 8 are arranged, there is no cold air blowing from the back side, and compared with the embodiment shown in FIG. The total air volume is reduced.

  As a result, the air curtain airflow A (see FIG. 3) that blows out from the ceiling-side cold air outlet 3a toward the lower inlet 3b through the cold air circulation duct 3 defined behind the back panel 4 is formed on the front surface of the interior. Since the air volume increases, the amount of frost generated in the interior can be more effectively reduced by suppressing the amount of outside air entering from the outside of the warehouse to the upper area (upper side) when the door is opened compared to the first embodiment. be able to.

DESCRIPTION OF SYMBOLS 1 Case main body 2 Door 3 Cold air circulation duct 4 Back panel 5 Display room 6 Evaporator of refrigerator 7 Fan 8 Display shelf 10 Goods (frozen food)

Claims (3)

A display shelf lined up and down is installed in the cabinet of the case body with a door on the front, and cold air is circulated and blown through the cold air circulation duct defined between the inner box / outer box of the case body. This is a refrigeration / refrigeration showcase with a cold air circulation door that keeps the air cooler, and blows out a cold air curtain to the front of the cabinet through the cold air circulation duct, and the rear panel in the cabinet corresponds to the upper and lower display shelves. In what has drilled a cold air outlet hole that blows out cold air from the midway path of the cold air duct toward the front of the interior,
The rear panel has upper and lower display shelves, a first pattern cold air outlet arranged in the left-right direction with the opening position aligned with the lower surface side of the interior ceiling, and the opening positions on the left and right sides of the display shelf. A refrigeration / refrigeration showcase with a cold air circulation type door, which is provided with a second pattern of cold air outlets arranged vertically.   In the frozen / refrigerated showcase with a door according to claim 1, the cold air outlets of the second pattern are perforated limited to the display shelves arranged on the upper side except for the display shelves arranged on the lower side of the cabinet. A refrigerated and refrigerated showcase with a cool air circulation type door.   The frozen / refrigerated showcase with a door according to claim 1 or 2, wherein the cold air outlets of the first pattern are formed by limiting to the display shelves arranged on the upper side except for the display shelves arranged on the lower side of the cabinet. A refrigerated and refrigerated showcase with a cold air circulation type door.