JP-7856693-B2 - refrigerator

JP7856693B2JP 7856693 B2JP7856693 B2JP 7856693B2JP-7856693-B2

Inventors

田口翔一
石▲崎▼ 祐理
上甲康之
上野真司
服部圭介

Assignees

日立グローバルライフソリューションズ株式会社

Dates

Publication Date: 20260511
Application Date: 20240322

Claims (10)

A refrigeration cycle including a compressor and a cooler, A cooler chamber housing the aforementioned cooler, The first container is housed in a freezer compartment with an opening at the front, The opening of the freezer compartment is provided with a freezer compartment door that can be opened and closed, The system includes a cooling fan that blows the air cooled by the cooler into the freezer chamber, A first cooling operation in which cold air is sent into the storage space of the first container, A second cooling operation in which cold air is sent toward the bottom surface of the first container, Fan stop operation to stop the aforementioned refrigeration fan, A refrigerator characterized by repeated operation.
In the refrigerator according to claim 1, A refrigerator in which, in a stable state, the time-averaged temperature of the bottom surface of the first container is lower than the time-averaged temperature of the air in the storage space of the first container.
In the refrigerator according to claim 1 or 2, A first air passage connecting the first opening of the freezer chamber and the cooler chamber, The system further comprises a second air passage connecting the second opening of the freezer chamber and the cooler chamber, wherein the first opening is arranged to include the area above the opening of the first container. The second opening is located below the opening of the first container, and the rotation direction of the refrigeration fan is reversed between the first cooling operation, which sends cold air towards the storage space of the first container, and the second cooling operation, which sends cold air towards the bottom surface of the first container. During the first cooling operation, the air cooled by the cooler is supplied to the freezer chamber through the first air passage and the first opening. A refrigerator characterized in that, during the second cooling operation, the air cooled by the cooler is supplied to the freezer compartment through the second air passage and the second opening.
In the refrigerator according to claim 3, A refrigerator characterized in that, during the second cooling operation, the refrigeration fan rotates at a higher rotational speed than during the first cooling operation.
In the refrigerator according to claim 3, A separate storage room for storing food at a different temperature range than the aforementioned freezer, Another air passage connecting the other storage chamber and the first air passage, A damper is provided in the other air passage, A refrigerator characterized by closing the damper during the second cooling operation.
In the refrigerator according to claim 1 or 2, A first opening and a second opening are connected to the discharge side of the aforementioned cooling fan, The second opening is connected to the return side of the aforementioned cooling fan, The system includes one or more dampers whose opening and closing are switched between a first cooling operation that sends cold air towards the storage space of the first container and a second cooling operation that sends cold air towards the bottom surface of the first container, In the case of the first cooling operation and the case of the second cooling operation, the rotation direction of the cooling fan is the same. During the first cooling operation, at least the air cooled by the cooler is supplied to the freezer chamber through the first opening which is connected to the discharge side of the refrigeration fan. A refrigerator characterized in that, during the second cooling operation, the air cooled by the cooler is supplied to the freezer compartment through the second opening which is connected to the discharge side of the refrigeration fan.
In the refrigerator according to claim 1 or 2, A refrigerator characterized in that, after a fan stop operation that stops the refrigeration fan, and before a first cooling operation that sends cold air towards the storage space of the first container, a second cooling operation is performed that sends cold air towards the bottom surface of the first container.
In the refrigerator according to claim 1 or 2, The system includes a door sensor that detects the opening and closing of the freezer door, A refrigerator characterized in that, after the door sensor detects that the door is closed, the next cooling of the freezer compartment is performed by sending cold air toward the bottom surface of the first container before performing a first cooling operation which sends cold air toward the storage space of the first container.
In the refrigerator according to claim 1 or 2, A refrigerator characterized in that the time of the first cooling operation, in which cold air is sent into the storage space of the first container, is longer than the time of the second cooling operation, in which cold air is sent towards the bottom surface of the first container.
In the refrigerator according to claim 1 or 2, In the aforementioned freezer chamber, the second container is positioned above the first container. A refrigerator characterized in that a third air passage for guiding air in the front-to-back direction is formed on the underside of the bottom surface of the second container .

Description

This invention relates to a refrigerator. Refrigerators are known that allow the flow of cold air into the freezer compartment to be switched. For example, Patent Document 1 discloses a design where, when the fan is rotating forward, cold air is blown out from one opening and drawn in from the other, and when the fan is rotating backward, cold air is blown out from the other opening and drawn in from the first opening. Japanese Patent Publication No. 2004-232879 Front view of a refrigerator according to this embodimentLongitudinal cross-sectional view of a refrigerator according to this embodimentFront view showing the interior configuration of the refrigerator according to this embodiment.Configuration diagram of the refrigeration cycle of the refrigerator according to this embodiment.Perspective view showing the configuration of the refrigerator door and container according to the embodiment.A diagram showing the airflow during normal refrigeration operation.Diagram showing airflow during container cooling and refrigeration operation.Graph showing temperature changes inside the freezer in Example 1Flowchart showing the control immediately after the lower freezer door is closed in Example 1Flowchart showing the control when the freezer compartment is in a stable state in Example 1Graph showing temperature changes (stable state) of food and ambient air in the comparative example.Graph showing temperature changes (stable state) between food and ambient air in Example 1.Graph showing the temperature change inside the freezer compartment immediately after the lower freezer compartment door is closed in Example 2.Flowchart showing the control immediately after the lower freezer compartment door is closed in Example 2Graph showing temperature changes of food and ambient air (immediately after closing the door) in the comparative example.Graph showing temperature changes of food and ambient air (immediately after closing the door) in Example 2.Graph showing the temperature change inside the freezer compartment immediately after the lower freezer compartment door is closed in a modified example of Example 2.Schematic diagram of the first airflow path that switches the circulation direction using a damper.Schematic diagram of the second airflow path that switches the circulation direction using a damper.A diagram showing the structure of the container in a modified example of Example 1. The embodiments of the present invention will be described below. In the description of the embodiment, when considering the fulfillment of a condition connected by "or," it encompasses both the fulfillment of any one of the conditions individually and the union of the conditions. For example, the statement "If condition A or condition B is met, execute process C" includes the following meanings: "If condition A is met, execute process C," "If condition B is met, execute process C," and "If either condition A or condition B, or both, are met, execute process C." In this embodiment, we consider the storage of frozen food packaged in a package. If the food remains at a higher temperature than the air inside the package for an extended period, moisture easily sublimes from the food surface, and this sublimated moisture adheres to the inside of the package as frost. If this process is repeated, the food dries out. <Basic Refrigerator Configuration> First, the basic configuration of the refrigerator according to this embodiment will be explained with reference to Figures 1 to 4. Figure 1 is a front view of the refrigerator according to this embodiment, Figure 2 is a cross-sectional view taken along line A-A in Figure 1, Figure 3 is a cross-sectional view taken along line B-B in Figure 2, and Figure 4 is a schematic diagram showing the configuration of the refrigeration cycle of the refrigerator according to this embodiment. As shown in Figure 1, the refrigerator body 10 of refrigerator 1 has an opening at the front, and the storage compartments are formed in the following order from top to bottom: refrigerator compartment 2, ice-making compartments 3 and upper freezer compartment 4 arranged side by side, lower freezer compartment 5, and vegetable compartment 6. Hereafter, the ice-making compartment 3, upper freezer compartment 4, and lower freezer compartment 5 may be collectively referred to as the freezer compartment 7. The front opening of the refrigerator compartment 2 is opened and closed by a rotating refrigerator compartment door 210a and 210b, which is divided into left and right sections. The front openings of the ice maker compartment 3, upper freezer compartment 4, lower freezer compartment 5, and vegetable compartment 6 are opened and closed by a pull-out type door 310 for the ice maker compartment, 410 for the upper freezer compartment, 510 for the lower freezer compartment, and 610 for the vegetable compartment, respectively. As shown in Figure 2, the refrigerator body 10, formed by filling the space between the outer box 1