JPH0456232B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a low-temperature show case in which a honeycomb material serving as a flow straightening device is provided at the air outlet. Figures 5 to 8 of ``Configuration of Nozzle of Freezer Kabinets'' show a honeycomb-shaped section (hereinafter referred to as honeycomb material) having many rectifying channels in the nozzle that blows air toward the opening, and this honeycomb material. A configuration is shown in which shutters or blanks are provided on the aisle side at a greater distance.

(C) Problems to be Solved by the Invention According to the configuration of the prior art described above, the honeycomb material is molded from aluminum foil or thin resin, and the impact resistance in the direction of the rectifying holes is weak, and the openings of the honeycomb material are weak. Since the side surfaces are directly exposed to the outside, if an external impact is applied, such as a customer's head hitting the honeycomb material or a child pushing the honeycomb material as a prank, the open side of the honeycomb material will be crushed and many pieces of damage will occur. A problem in which a part of the rectifier path is blocked and air cannot be blown out from the blocked rectifier path, causing a turbulent area in the air curtain formed at the opening, resulting in an increase in the refrigeration load. occurred.

In order to solve this problem, the inventors of the present invention invented a structure in which a honeycomb material is provided at the location of the shutter or material, and a shutter or material is provided at the location of the honeycomb material. With this configuration, the shutters or material are exposed to the outside, so
Damage to the honeycomb material can be prevented, but because the honeycomb material and the shutter or material are separated and the air passage angles between the two are different, the air that has been rectified by the honeycomb material merges immediately after passing through the honeycomb material. A new problem arose in that the air curtain's rectification characteristics deteriorated because the flow was divided into turbulent flows when it hit the shutters or the side of the passageway of the material.

In particular, as shown in FIGS. 2 and 5 of an air outlet rectifier such as an open shower case described in Japanese Utility Model Application Publication No. 51-147360, a plurality of rectifier plates arranged parallel to each other are used. In the case of a rectifying network that is spaced apart from the end face of the rectifying plate on the leeward side of the rectifying plate, the mesh of the rectifying network is smaller than the gap between the rectifying plates that form the rectifying path. Not only does the rectifier network act as air resistance and slow down the flow velocity, but also because there is a gap between the end face of the rectifier plate and the rectifier network, the airflow that passes through the gap between each rectifier plate is reduced. However, since the downstream side of the edge of each rectifying plate has a negative pressure, turbulent flow occurs between each of the rectifying plates and the rectifying network, resulting in a problem that the rectifying characteristics of the air curtain are significantly deteriorated.

(d) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention uses an aluminum foil or an aluminum foil having a large number of rectifying channels having a rectangular or circular cross section at the outlet which blows air toward the opening. A honeycomb material made of extremely thin resin and a hard lattice member having a large number of air passages and located on the opening side of the honeycomb material are arranged in contact with each other, and each of the shapes is connected to the honeycomb material. It is configured to communicate with a plurality of flow regulating holes in the material.

(E) Effect When the grid member 15 is subjected to an external impact,
While acting as a guard to protect the honeycomb material 14, it also acts to continuously rectify the air after passing through the honeycomb material 14.

(F) Embodiment An embodiment of the present invention will be described below based on the drawings.
This is a flat low-temperature case whose main body is composed of a heat insulating wall 3 formed with. The heat insulating wall is the front wall 3
A transparent window 4 made of glass is erected at the top of A, and a bumper rail 5 is installed along the front lower part of the transparent window, and an apron 3C is formed on the top of the back wall 3B to project forward. are doing. Reference numeral 6 denotes a partition plate arranged at an appropriate distance from the inner wall of the heat insulating wall, and along with the arrangement of this partition plate, a plate fin type cooler 7 and an axial flow blower 8 capable of forward and reverse rotation are housed and arranged. In addition, a cold air passage 11 having one end opened forward to serve as a blowout port 9 and the other end opened upward to serve as a suction port 10, and a storage chamber 12 are formed in the heat insulating wall 3. A transparent plate 13 is erected on the upper part of the front wall 6A of the partition plate, which allows the storage chamber 12 to be viewed from the outside together with the transparent window, and which substantially raises the load line of the storage chamber 12. Reference numeral 14 denotes a honeycomb material disposed at the air outlet, and reference numeral 15 represents a lattice member which is also arranged at the air outlet 9 and is located closer to the opening 2 than the honeycomb material. Reference numeral 16 denotes a product drop prevention member such as punching metal or a net placed below the suction port. Reference numeral 17 denotes an electric heater arranged near the outer side of the cold air passage 11 made of the honeycomb material, and is always energized regardless of whether the low-temperature show case 1 is being cooled or defrosted. During cooling operation, the low-temperature show case rotates the blower 8 in the forward direction to forcefully circulate the cold air that has been heat-exchanged in the cooler 7 as shown by the solid line arrow in FIG. 2 to form a cold air curtain (AC) in the opening 2. However, during the defrosting operation in which the supply of refrigerant to the cooler 7 is stopped, the blower 8 is rotated in the reverse direction to flow air (outside air) as indicated by the chain arrow in FIG. 2 to defrost the cooler 7.

The honeycomb material 14 and the lattice member 15, which are arranged adjacent to each other at the outlet, both act as a flow straightening device. The honeycomb material is made of aluminum foil or extremely thin resin, and forms a large number of rectifying channels 18 with a square or circular cross section in the direction of cold air passage, and the lattice member is made of hard resin or the like. It is made of a heat insulating material, and has a large number of air passages 19 each having a rectangular longitudinal section in the cold air passage direction, and one of the air passages communicates with a plurality of the rectifying passages, for example ten. In addition, the rectifying passage 18 and the air passage 19 are arranged in parallel so that the cold air flows straight through.
Note that 20 is a directing plate that directs a portion of the cold air toward the electric heater 17.

According to this configuration, since the hard lattice member 15 is arranged closer to the opening 2 than the honeycomb material 14, even if an external impact is applied to the air outlet 9, the impact force is first applied to the lattice member 15. It is distributed uniformly from the side of the cold air passage 11 of this lattice member to the side of the opening 2 of the honeycomb material 14, and as a result, the impact force on the honeycomb material 14 is alleviated,
Damage to the honeycomb material 14 can be avoided.
In addition, since the honeycomb material 14 and the lattice member 15 are adjacent to each other, the branched cold air that has passed through each rectification path 18 flows directly into each air path 19, and is also rectified in each air path to form an air curtain ( Since the air is blown out as an air curtain (AC), no merging of cold air occurs between the honeycomb material 14 and the lattice member 15, and therefore turbulence in the air outlet 9 can be avoided. ) can be formed.

Furthermore, since each of the air channels 19 of the lattice member 15 communicates with a plurality of rectifying channels 18 of the honeycomb material 14,
A plurality of groups of cold air divided by the rectifying path 18 are merged in each air path 19 and continuously rectified, so that the rectifying time of the cold air in the outlet 9 can be prolonged. Since it is made of an insulating material, condensation or frost is unlikely to occur, and clogging of the air passage 19 can be avoided.

(G) Effects of the Invention Since the present invention is configured as described above, it achieves the effects listed below.

A lattice member made of aluminum foil or extremely thin resin that is harder than honeycomb material is placed on the opening side, so when an external impact is applied to the outlet, this impact force is first transferred to the lattice. Since the dispersion is relaxed by the member and then transmitted to the honeycomb material, damage to the outlet of the rectifying channel of the honeycomb material can be prevented.

Since the honeycomb material and the lattice member are arranged in contact with each other, the cold air from the rectifying channel continues to flow into the air channel and is held by the lattice member and rectified, so the honeycomb material and the lattice member are also continuous. This allows the cold air to be rectified, and there is no gap between the honeycomb material and the lattice member that would cause turbulence.
The rectification time of the cold air can be increased, and as a result, the rectification characteristics of the air curtain are improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the low-temperature show case of the present invention, in which FIG. 1 is a vertical cross-sectional view of a main part, and FIG. 2 is a vertical cross-sectional view of the whole. 2... Opening, 9... Air outlet, 14... Honeycomb material, 15... Grid member, 18... Rectification path, 19...
...Wind path.

Claims (1)

[Scope of Claims] 1. A honeycomb material made of aluminum foil or extremely thin resin having a large number of rectifying channels with a rectangular or circular cross section at the air outlet that blows air toward the opening, and a large number of air flow holes. A hard lattice member having a channel and located on the opening side of the honeycomb material is arranged in contact with the air channel, and each of the air channels is communicated with a plurality of rectifying holes of the honeycomb material. Low temperature case. 2. The low-temperature show case according to claim 1, wherein the grid member is made of a thermally insulating member.