JPH0544693Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a refrigerator-freezer equipped with a quick-freezing chamber, and in particular, the present invention relates to a refrigerator-freezer equipped with a quick-freezing chamber. The present invention relates to a refrigerator-freezer that can perform refrigeration control.

[Prior art]

FIG. 3 shows a schematic side sectional view of a quick freezing chamber provided in a conventional refrigerator-freezer, which is the background of the present invention.

In general, the quick freezing chamber 1 is separated from the freezing chamber by a casing 3, and the casing 3 includes a front door 5 that is rotatable about a shaft 4, and a cold air suction hole provided at the top in the figure. A mouth 9 is provided. Further, a metal plate 6 is disposed on the inner bottom surface of the quick freezing chamber 1, and a pipe 7 through which a refrigerant flows for direct cooling of the frozen object 2 is provided on the back surface of the metal plate 6. A temperature sensor 8 is provided to detect the temperature of the object 2 to be frozen and send a temperature signal to a refrigeration control device (not shown) to control refrigeration in the quick freezing chamber 1.

Therefore, when rapidly freezing the object 2 to be frozen, first the front door 5 of the quick freezing chamber 1 is rotated in the time direction in the figure, and the object is placed on the metal plate 6 in the quick freezing chamber 1. Place frozen food 2 on it. Next, when a switch (not shown) is turned on to start quick freezing, the compressor and internal fan motor are activated, and cold air enters the quick freezing chamber 1 from the cold air suction port 9 and is directed above the frozen items 2. Cooling is performed from the (surface). When the cooling has been sufficiently performed and the temperature sensor 8 detects that the temperature has fallen below a predetermined temperature (for example, 4°C), the refrigeration control device is activated to stop the internal fan motor and cause the rapid cooling. An electromagnetic valve (not shown) that stops the cold air from entering the freezer compartment 1 and at the same time causes a refrigerant to flow into the pipe 7 operates, thereby directly cooling and freezing the object 2 to be frozen. (Figure 4).

[The problem that the idea aims to solve]

Quick freezing compartment 1 in such a conventional refrigerator-freezer
Only one temperature sensor 8 for controlling the freezing inside the quick-freezing chamber 1 is provided, and the detection method of the temperature sensor 8 is by contact. Therefore, when rapidly freezing the frozen object 2 that has a large contact area with the metal plate 6 as shown in FIG. 3, the temperature sensor 8 accurately detects the frozen object as shown in FIG. However, when rapidly freezing an object 2a having a small contact area with the metal plate 6 as shown in FIG. 5, the temperature sensor 8 detects the temperature as shown in FIG.
does not accurately detect the temperature of the frozen object 2a.
This is because the cold air entering the quick freezing chamber 1 due to the operation of the internal fan motor is
At the same time, since the metal plate 6 itself is directly cooled, the metal plate 6 is cooled to the predetermined temperature first even though the object to be frozen 2a is not cooled to the predetermined temperature. This is an erroneous detection by the temperature sensor 8 that occurs due to the

In this way, when the object to be frozen 2a is directly cooled without being sufficiently cooled by the cold air, only the surface in contact with the metal plate 6 is cooled.
There was a problem in that it was not possible to freeze all the way to the top.

Therefore, the purpose of the present invention is to accurately grasp the temperature of the object to be frozen, regardless of the volume or shape of the object, and to appropriately control the freezing inside the quick freezing chamber. The purpose is to provide refrigerators and freezers.

[Means to solve the problem]

The main means adopted by the present invention in order to achieve the above object is that in a refrigerator-freezer equipped with a quick-freezing chamber for rapidly freezing the frozen articles, the frozen articles are placed in the quick-freezing chamber. Temperature sensors are installed on the back side of the metal plate and near the ceiling of the quick-freezing chamber, respectively, and freezing control in the quick-freezing chamber is performed based on temperature signals from both temperature sensors. This is a refrigerator/freezer.

[Effect]

According to the present invention, temperature sensors for controlling freezing in the quick freezing chamber are located at two locations: on the back side of the metal plate on which objects to be frozen are placed in the quick freezing chamber, and near the ceiling of the quick freezing chamber. The temperature sensor installed on the back side of the metal plate detects the temperature of the contact area between the frozen object and the metal plate as before, and the temperature sensor installed near the ceiling detects the temperature of the contact area between the frozen object and the metal plate. The temperature of the air inside the quick freezing chamber is detected.

In this way, since the temperature of the frozen object is detected from both the contact temperature and the air temperature, it is possible to accurately grasp the cooling state of the frozen object, regardless of the volume or shape of the frozen object. Therefore, it is possible to appropriately control the freezing inside the quick freezing chamber.

〔Example〕

Next, embodiments embodying the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a schematic side sectional view of a quick-freezing chamber of a refrigerator-freezer according to an embodiment of the present invention, and FIG. 2 is a time chart showing the state of freezing control in this quick-freezing chamber.

In the following description, the same reference numerals will be used for the same elements as those of the conventional quick freezing chamber 1 shown in FIGS. 3 and 5, and the description will be omitted. Furthermore, the following examples are merely specific examples of the present invention, and are not intended to limit the technical scope of the present invention.

In this embodiment, the difference from the conventional quick freezing chamber 1 is that, as shown in FIG.
A metal plate 6 on which the object to be frozen 2b is placed.
Temperature sensors 8 are installed at two locations: on the back surface of the casing 3 and near the ceiling of the casing 3 of the quick freezing chamber 11, respectively.
10 is provided, and freezing control in the quick freezing chamber 11 is performed based on temperature signals from both temperature sensors 8 and 10.

Therefore, when rapidly freezing an object 2b that has a small contact area with the metal plate 6 as shown in FIG. 1, first turn on a switch (not shown) to start, and then the compressor and The internal fan motor operates, and cold air enters the quick freezing chamber 11 from the cold air suction port 9, cooling the upper part (surface) of the object to be frozen 2b and the metal plate 6 itself. Then, while the object to be frozen 2b is hardly cooled, the metal plate 6 is cooled to a predetermined temperature (for example, 4° C.) or lower,
A temperature sensor (hereinafter referred to as a first temperature sensor) 8 disposed on the back surface of the metal plate 6 detects the temperature of the metal plate 6 as the temperature of the object to be frozen 2b, and For example, a signal is sent to the refrigeration control device that performs refrigeration control to the effect that the refrigerator fan motor may be stopped.

However, the refrigeration control device does not operate the refrigerator fan motor because the temperature signal from the temperature sensor (hereinafter referred to as the second temperature sensor) 10 disposed near the ceiling of the other casing 3 has not reached a predetermined temperature or lower. The above-mentioned object 2 to be cooled by cold air without stopping
b continues cooling. Then, the object to be cooled 2
When b approaches the predetermined temperature, the temperature of the air in the quick freezing chamber 11 also approaches the predetermined temperature, so a temperature signal is sent from the second temperature sensor 10 to the refrigeration control device, and the first temperature sensor The internal fan motor is stopped based on the temperature signals from both the temperature sensor and the second temperature sensor. When the internal fan motor is stopped and cooling of the frozen object 2b by the cold air is stopped, a solenoid valve for flowing refrigerant into the pipe 7 is operated to directly cool and freeze the frozen object 2b.

[Effect of idea]

According to the present invention, in a refrigerator-freezer equipped with a quick-freezing chamber for rapidly freezing objects to be frozen in the freezing chamber, the back side of a metal plate on which objects to be frozen in the deep-freezing chamber are placed, and the quick-freezing A refrigerator-freezer is provided, characterized in that a temperature sensor is disposed near the ceiling of the chamber, and a temperature sensor is provided in the vicinity of the ceiling of the chamber, and freezing control within the quick-freezing chamber is performed based on temperature signals from both temperature sensors. This makes it possible to perform optimal freezing control within the quick-freezing chamber, regardless of the volume or shape of the object to be quickly frozen.
It is possible to efficiently freeze objects to be frozen.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of a quick-freezing compartment of a refrigerator-freezer according to an embodiment of the present invention, FIG. 2 is a time chart showing the state of freezing control in the quick-freezing compartment, and FIG. 3 is a diagram of the present invention. A schematic side sectional view of the quick-freezing compartment installed in a conventional refrigerator-freezer, which is the background of the invention.
Figure 4 is a time chart showing the state of freezing control in the quick freezing chamber, Figure 5 is a diagram equivalent to Figure 3 when rapidly freezing objects with a small contact area with the metal plate, and Figure 6 is a time chart showing the state of freezing control in the quick freezing chamber. , is a time chart showing the state of freezing control in the quick freezing chamber. Explanation of symbols, 1... Rapid freezing chamber, 2... Object to be frozen, 6... Metal plate, 8... Temperature sensor (first temperature sensor), 10... Temperature sensor (second temperature sensor), 11... ...Rapid freezing chamber.

Claims (1)

[Scope of Claim for Utility Model Registration] In a refrigerator-freezer equipped with a quick-freezing chamber for rapidly freezing objects to be frozen, the back surface of the metal plate on which objects to be frozen are placed in the deep-freezing chamber; A refrigerator-freezer characterized in that a temperature sensor is disposed near the ceiling of each of the quick-freezing compartments, and freezing control in the quick-freezing compartment is performed based on temperature signals from both temperature sensors.