JPH02254277A - Cooling method for refrigerating chamber - Google Patents

Abstract

PURPOSE:To make it possible to cool a refrigerated warehouse having a large space and hence improve its cold insulation efficiency by selecting either an internal wall- based indirect cooling method or a direct cooling method due to the ventilation from a damper in an effort to cool a refrigerating chamber. CONSTITUTION:A refrigerating chamber 1 comprises a heat resistant outside wall 2 having insulation performance and an inside wall 4 made of a metal plate having excellent heat conductivity provided with a specified space 3 inside. One inside corner section in the refrigerating chamber 1 forms a machine room 5. Inside the machine room 5 is installed a cooling device in ordinary structure with a blower 7. The cooled air from the cooling device 6 is blown into the space 3 by the blower 7 so that the space 3 may serve as a cooling space for the inside wall 4. Furthermore, dampers 8 and 9 are installed to the inside wall 4 located before and behind the machine room 5 so that the dampers may shut down the cooling space 3 and introduce the cooled air to the refrigerating chamber 1 and discharge the cooled air to the cooling space 3. The refrigerating chamber 1 can be directly or indirectly cooled by opening and closing the dampers 8 and 9. It is, therefore, possible to arrange the room temperature to a preset temperature in a short time by direct cooling and maintain the preset value by indirect cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for cooling a refrigerated room such as a refrigerated warehouse.

[Prior art] Methods for cooling the inside of a refrigerator include direct cooling, in which room air is ventilated with cooling air using a means such as a blower, and a method in which the walls of the refrigerator are made up of two layers, and the space between the inner and outer walls is There are two methods of indirect cooling: circulating and supplying cold air to cool the inner walls of the refrigerator, and absorbing the heat of the air in the refrigerator room by the inner walls to lower the room temperature.

[Problem to be Solved by the Invention 1] In the above-mentioned direct cooling, the indoor temperature can be lowered in a short time due to cooling by air blowing, but it is possible to reduce the indoor temperature uniformly.
It is difficult to cool down the air, making it unsuitable as a cooling means for refrigerated warehouses, etc., which require a large space. In addition, the indoor humidity also decreases due to the ventilation of cold air, and there are other problems such as the inability to perform refrigeration in high humidity environments.

In addition, the indirect cooling described above does not require indoor air ventilation, making it easy to uniformly control the indoor temperature, and also enables refrigeration at high humidity, making it ideal for cooling large refrigerated rooms in refrigerated warehouses. Although this is an extremely effective method, it is inconvenient because it requires time to change the room temperature because it is indirect.

This invention was devised by focusing on the advantages of the above-mentioned two conventional indoor cooling methods, and its purpose is to improve the cooling aV refrigerating and cold storage of large-space refrigerators by direct cooling and indirect cooling. It is an object of the present invention to provide a new method for cooling a refrigerator compartment that can be efficiently performed using both methods.

[Means for Solving the Problems] The feature of the present invention according to the above-mentioned object is that the peripheral wall of the refrigerator compartment is made up of a double layer of a heat-insulating outer wall having heat insulating properties and an inner wall having good thermal conductivity, so that the wall between the two walls is double-layered. 97. A cooling device equipped with an air circulation means is installed or connected in a part of the space to make the space a cold space, and a flow of cold air is created on the inner wall in front of the cooling device. A damper is installed inside the refrigerator compartment, and the refrigerator compartment is cooled by selecting either indirect cooling through the inner wall or direct cooling through ventilation from the damper.

The wall material and L7-C constituting the inner wall with good thermal conductivity are preferably metal plates such as stainless steel or aluminum, and the width of the cooling space is set arbitrarily depending on the scale of the refrigerating room.

When the above-mentioned cooling w device is installed inside the cold W& room, a part of the cooling space is expanded to form a machine room, and the cooling device is installed in the machine room. It is also possible to install a heat pipe and a secondary refrigerant for a heat storage device, and to install the negative side outside.

Furthermore, when the cooling device 6 is placed outdoors, the cooling device 6 and the cooling space are connected by a duct or the like.

The temperature of the cold air, the humidity in the cold room, the gas concentration, etc. can be detected by various sensors installed in the refrigerator room, and the values detected by these sensors can be controlled individually or simultaneously.

[Function] In the above cooling method, when cold air is blown with the damper closed, the cold air from the cooling device flows through the cooling space and cools the inner wall. The inner wall absorbs heat from the air inside the refrigerator compartment, lowering the temperature inside the refrigerator compartment.

Furthermore, when the damper is opened, the cold Ell space is blocked by the damper and flows into the refrigerator compartment, causing a change in the refrigerator compartment and the indoor temperature to rapidly drop to the setting II.

Next, the present invention will be explained with reference to the illustrated example.

[Example I] The drawing is a schematic cross-sectional view of the refrigerating compartment of one car.
G, i It is composed of a heat-insulating outer wall 2 having a heat insulation property of 4, and an inner wall 4 made of a metal plate with good thermal conductivity and installed with a required space 3 inside the heat-insulating outer wall 2.

One inner corner of the refrigerator compartment 1 is a machine room 5, and a cooling device 6 of a normal structure is installed in the machine room 5 together with a blower 7. The cold air from the cooling device 5hj is sent into the space 3 by the blower 7, so that the space 3 acts as a space for cooling the inner wall 4 (hereinafter referred to as a cooling space).

Dampers 8 and 9 are provided on the inner wall 4 before and after the machine room 50 to block the cooling space 3 and guide cold air into the refrigerator compartment 1 and to flow out into the cooling space 3. The inside of the refrigerator compartment 1 can be directly or indirectly cooled by operation.

It is preferable to cool the refrigerator compartment 1 temporarily by ventilation, from the viewpoint of humidity, etc., and it is possible to efficiently perform rapid temperature control, which is difficult to achieve with indirect cooling by ventilation of the cooling space 3.

In addition, it is difficult to create a uniform lagoon living environment with direct cooling through indoor ventilation, but indirect cooling from around the room through the cooled inner walls 3 makes it easier to create a uniform temperature environment, and this condition can be maintained. Can be maintained for a long time.

Switching between these two cooling means can be easily performed by opening and closing the dampers 8 and 9, and this operation can also be performed automatically by a command from a sensor installed in the refrigerator compartment 1. Furthermore, the opening and closing operations of the dampers 8 and 9 are also used to control humidity and moth concentration. In order to perform these controls smoothly, a temperature sensor, a humidity sensor, and a gas sensor may be installed at desired locations in the refrigerator compartment 1, although they are not shown in the drawings.

In this refrigeration method, the refrigerator compartment 1 is cooled by direct cooling until the indoor temperature reaches the 1ζ set temperature depending on the stored items. When the temperature sensor detects the set temperature,
The dampers 8 and 9 are closed, and ventilation is switched from the refrigerator compartment 1 to the cooling space 3. As a result, the refrigerator compartment 1 has been cooled down! 4 to maintain the set concentration.

The ventilated air is not discharged to the outside, but is blown into the cooling space 3 without being cooled again. Furthermore, when the gas concentration in the refrigerator room rises or the humidity drops, each sensor detects this and opens the dampers 8 and 9, thereby ventilating the room.

At this time, humidity can be supplemented and gas can be exhausted to the outside. It is also possible to take outside air into the room to adjust the humidity if necessary.

[Advantageous effect 1] As described above, the present invention has a double peripheral wall of the cold R room 1 made of the heat-insulating outer wall 2 having heat insulating properties and the inner wall 4 having good thermal conductivity. A cooling device 6 equipped with an air circulation means is installed or connected to a part of the required space 3 thus formed, and the space 3 is used as a cooling space, and a flow of cold air is introduced into the refrigerator compartment through the inner walls 4 before and after the cooling device. To change the cooling of the refrigerator compartment 1, dampers 8 and 9 are installed, and the cooling of the refrigerator compartment 1 is performed by indirect cooling by the inner wall 4 and by dampers 8 and 9.
Since the refrigerator compartment is cooled by selecting either direct cooling by ventilation from ゜9, the indoor temperature can be adjusted to the set temperature in a short time by directly using 6I9, and the set temperature can be indirectly controlled. It can be maintained by targeted cooling.

As a result, it becomes easier to maintain a uniform indoor temperature,
−〇! Since control can also be carried out at M degrees, the indoor space can be used more fully than before, and by indirectly cooling the temperature, there is no large fluctuation in the temperature of 8 degrees in the refrigerator room, making it easier to control humidity. As a result, the deterioration of stored items is slowed down, allowing for long-term storage and high-quality storage.In addition, the circulation of cold air reduces ventilation loss and saves energy.
b It offers many excellent benefits.

[Brief explanation of drawings]

The drawings are schematic cross-sectional views of a refrigerating room for explaining the refrigerating room cooling method according to the present invention, and FIG.
FIG. 2 is an explanatory diagram during ventilation of the cooling space. 1... Refrigerator room 2... Heat-insulating outer wall 3... Space (cooling space) 4...
・Inner wall 5...Machine room 7...Blower 6...Cooling device 8.9...Damper Figure 1

Claims (1)

[Claims] The peripheral wall of the refrigerator compartment is made up of a double wall consisting of a heat-insulating outer wall with heat insulating properties and an inner wall with good thermal conductivity to form a required space between the two walls, and a part of the space is provided with air circulation means. In addition to making the space a cooling space by installing or connecting a cooling device with the cooling device, dampers are installed on the inner walls before and after the cooling device to change the flow of cold air into the refrigerator compartment, and the cooling of the refrigerator compartment is achieved by indirect cooling by the inner wall. A cooling method for a refrigerator room, characterized by selecting and performing either direct cooling by ventilation from a damper.