JPS60216161A - Freezing refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigerator in which cold air is forcedly circulated inside the refrigerator by a blower, and a compartment is formed inside the refrigerator.

(b) Prior Art A conventional refrigerator of this type is disclosed in, for example, Japanese Utility Model Application Publication No. 58-22678. In this publication, a closed storage chamber is formed within the refrigerator compartment, a cold air passage is formed around the storage chamber, and cold air from a busy fan in the cold air passage is introduced to cool the room without drying it. Indoor temperature control is achieved by adjusting the amount of cold air supplied to the cold air passages using a damper plate, but accurate temperature control using such a manual damper is difficult.

In addition, conventionally, this type of compartment is controlled at a freezing temperature similar to that of a freezer, or at a temperature of +1°C to +2°C, which is slightly lower than the temperature of a refrigerator room, and is used to store and preserve food that perishes quickly, such as food or fish. Although the food can be preserved for a long time by freezing it, it has the disadvantage that the flavor is lost when thawing because it is buried in 1 liter, and the flavor is also lost when the temperature is controlled at +1°C to +2°C. However, it has the disadvantage of a short shelf life.

(C) Purpose of the Invention The present invention relates to a refrigerator-freezer having a freezer compartment and a refrigerating compartment, in which compartments are formed in the interior of the refrigerator. An object of the present invention is to provide a refrigerator-freezer that maintains the interior of the refrigerator in an icy temperature storage temperature range.Constitution of the InventionThe present invention divides the interior of the refrigerator into a freezer compartment and a refrigerator compartment, and uses a blower to blow cold air into each compartment. A compartment is formed in the interior of the refrigerator-freezer supplied by controls the blower and compressor, controls the amount of cold air supplied to the refrigerator compartment based on the sensor in the refrigerator compartment, and adjusts the amount of cold air to cool the compartment based on the sensor in each compartment. The system is designed to maintain and control the temperature within the ice temperature storage temperature range.

(E) Embodiment An embodiment will be explained with reference to the drawings. Figure 8 shows the refrigerator-freezer [
1) shows a cross-sectional view. The refrigerator/freezer [1] has an outer box (2) made of steel plate and an inner box (3) made of synthetic resin with a space between the outer box (2).
Incorporate the urethane insulation (4) between both boxes (2+(3)).
) is foam-filled to form an insulating box. The interior of the refrigerator-freezer (1) is divided into upper and lower sections by a partition wall (5) filled with insulation material, with a diagram of the freezer compartment cooled to freezing temperature (for example, -20°C) at the top and a diagram at the bottom. Refrigeration room (2) maintained at a refrigeration temperature above the freezing point (e.g. -3°C)
and is formed. A partition front part (8) is installed on the opening edge of the refrigerator compartment (R1) from left to right, and the inner box (3) is formed at approximately the same height as this partition front member (8). A heat-insulating partition plate (9) is attached supported by the groove (3a), and the refrigerator compartment (part) is divided into upper and lower parts by this partition plate (9).In the space above the partition plate (9), is the partition wall (
5) A box-shaped case (11) that opens at the front is installed with a space between the lower surface, the upper surface of the partition plate (9), both sides of the inner box (3), and the rear surface to form a cold air passage. Case Ql)
The opening edge of the inner box (3), partition wall (5) and partition plate (91
As a result, a compartment (I(+) is formed in this case Ql) that communicates only with the outside of the refrigerator, and the front end of the cold air passage 01 is closed.

Above the partition wall (5), a bottom plate A4 of the freezer compartment [F] having a heat insulating material on the lower surface is provided with a gap, and this bottom plate Q3
) and the partition wall (5), a cooling chamber θ4) is formed. A cooler Q51 included in the refrigeration cycle is housed and installed in this cooling chamber I, and a blower QQ is located behind this cooler 09.
is provided. A motor (16) that drives a blower (161)
M) is a storage box (M) located behind the cooling chamber αa, attached to the inside of the back of the outer box (2), and embedded in the heat insulating material (4).
17), and the rotating shaft is connected to the storage box aη and the insulation material (4
) and the inner box (3) to face the inside of the cooling chamber I, and a blower fan (16F) is attached to the tip thereof. An air blower (a device that rotates to suck in cold air from the direction of the rotating shaft and blows it out in the radial direction.
The rear side (13a) of 31 rises upward with a gap from the rear surface of the inner box (3), forming a duct (Q8) that communicates the rear of the cooling chamber I with the freezing chamber [F], and is accelerated by the blower cod. The cooled air is discharged into the freezer compartment [F] from the discharge port (18a) at the tip of the duct a barrel. ■ is the rear part of cooling room αa and cold air passage a
[A duct member forming a duct (a) that communicates with
The cold air accelerated by the blower Q61 is discharged into the cold air passage a from a discharge port (20a) formed at the upper rear surface of the inner box (3) behind the cold air passage αQ. C) 1) is the cooling chamber α4)
The discharge port (21) is a duct that communicates between the rear part and the refrigerator compartment (2).
a) The cold air is discharged into the refrigerator compartment (R1).The cold air that circulates through the freezer compartment and the cold air passage QO is directly cooled in the freezer compartment, and the compartment 0 is indirectly cooled from the case (11). After cooling, the cold air inlets (2aa and 2aa, i) connected to the front part of the cooling chamber return to the cooling chamber oaVc, respectively.

There is a refrigerator compartment (R1) inside the insulation material (4) on the side wall of the refrigerator (1).
A return duct Q4 is formed that communicates the front part of the refrigerator compartment (R1) with the front part of the refrigerator compartment (R1).
From c), it returns to the cooling chamber 04). (E) is the compressor included in the refrigeration cycle, and Qη@Kan is the chamber (Pi(+
(This is a door that closes the front opening of the magazine.

The opening and closing of the cold air discharge chambers from the discharge ports (20a) (21a) are controlled by an electromagnetic damper 0!906). Here, the electromagnetic dampers C15) (to) may be provided at the suction ports (c) and (c), respectively. Electromagnetic damper C3 chant 1 (not shown)
It is composed of a plunger, an electromagnetic coil (35A), an arm c3n, and a backful plate attached to the tip of arm G7J to open and close the discharge port (20a). (The electromagnetic damper has a similar configuration.) Figure 2 shows an electrical circuit diagram of the temperature control device. (
411 (42) (43) are triacs, which constitute a series circuit with the compressor motor (26M) and the electromagnetic coils (35A) (36A) of the electromagnetic damper 051 (to), respectively, and are connected to an alternating current power source (AC). A DC power supply (Vcc) is connected in series with the blower motor (16M) using a transistor.
). (49 is a well-known microcomputer, and its output terminal (OUT+) (OUT
) (OUT4) are connected to triacs (411 (42
The gate of 1GL1 and the base of the transistor (44) are connected. tam u7) (41 (+
) (INt) Connected to (INK). 46〔6υ
are thermistors (negative resistance elements) as sensors that detect the temperature in compartment 0, the freezer compartment entrance, and the refrigerator compartment U, respectively.
, and the terminal potential of thermistor 4 (a) 6υ (■1) (
Vri (V,) is the comparator 0e(4η(4
It is connected to the inverting input terminal (-) of No.8. In addition, the set potential (V5
) (Ve) is input. (rt) (rt) (rs)
are resistors connected in series, the select switch (SW) is connected to the resistor (r3), and (SWs) is the resistor (r and (r,)
(The select switch (SW+) is not shown, but it is a switch that opens the switches (SW, ) C3Ws> at the same time. -HK is connected. TRIAC (4υ (42) (43 is microcomputer) (4) The gate is triggered by heating and conducts, and the motor (26M) and electromagnetic coil (35A) (36A) are energized. Electromagnetic coil (35A) ) (36A) is energized, the electromagnetic damper e5)06+ operates, and the respective discharge ports (
20a) (21a) are opened, and in the non-energized state, the discharge port (
20a) (21a) is closed. Transistor (44
) is one output terminal (OUT,
) conducts during a low potential (hereinafter referred to as rJJ) to operate the motor (16M), but the output terminal (O
By changing the output pulse width generated at the UT, ), the rotation speed of the motor (16M) is also changed. The comparator (4G (4ηG48) has a predetermined hysteresis, and when the temperature (THN) of the compartment H increases and (Va)>(Va), the output becomes a high potential (hereinafter referred to as rhJ). , descends (Va) < (
Va and the output becomes rlJ. The potential (■,) can be changed to three types of values by switching the switches (SWI) C3Wt) (SWa). Comparator (4
7) The temperature (T FN) of the freezer compartment [F] rises and (V
l+) > (Vt), and the output becomes rhJ, and then (Vs) < (Vt), the output becomes "l". Similarly, the comparator (48&-!, the temperature of the refrigerator compartment (R1)
TRN) rises and becomes (Va) > (Vs), the output becomes rhJ, and it falls and becomes (Va) < (Vs) and becomes rJ.
J.

FIG. 3 shows a functional block diagram of the temperature control device (4 [as @a7), which includes a thermistor (A), a compartment temperature detecting means, and a refrigerator room temperature, respectively. It is a detection means, and the side is a switch (SW+
) (SWt) (SWs) and resistance ('υCr (
r, ) and the like. 69 is OR
Gate, side 11) 13 (631 are each trialler 0υ, transistor (l14), triac (42 (
43 etc., respectively motors (26M) (16M),
This is a switching means for driving the electromagnetic coil (35A, ) C36A). The comparator (47) compares a predetermined set value with information from the freezer compartment temperature detection means 69 and operates the switching means-IB to drive the motor (26M) (
16M). The comparator screen compares the information from the compartment temperature detection means 6e and the compartment temperature setting means (5E) and operates the switching means VυI2 to control the motor (16).
M), the electromagnetic coil (35A) is energized, but the comparator (switching means 61 when the output of 4η is rJJ)
The motor (16M) is operated at a lower rotation speed. The comparator (48) also has a predetermined set value and the refrigerating room temperature detection means 6.
7) and operates the switching means line to energize the electromagnetic coil (36Δ).

Figures 4 to 7 are flowcharts showing the software of the microcomputer (451), and the operation will be explained along these lines. At the temperature of (g),
(T F N−r ) is the temperature at the time of the previous sampling, and sampling is performed when the power is turned on and when each set temperature is crossed, and after performing the processing work, the temperature at the time of the previous sampling (T F The current temperature (TFN) shall be stored instead of *-s). From now on, the same applies to the refrigerator room (temperature (TR)) and temperature (TH) of compartment 0. In step (S,), the current temperature (TF,
For example, when l) is higher than the upper limit temperature (TPO, ) such as -18℃, (Va) > (Va), and since the input terminal (IN) of the microcomputer 0!9 is rhJ, the step (S) advances. , output terminal (OUTt) (OUT,
) becomes "f", triggering the triac Oυ and the transistor 04) to operate the compressor (c) and the blower αQ to perform cooling operation. This cooling operation causes the temperature (T
When F) decreases and falls below TFON), the step (So
The process proceeds to step (S,), where it is compared with the lower limit temperature (TF,...) such as -22°C, and if it is higher than that, the process proceeds to step (S4) and the temperature at the previous sampling (TF,...) is compared.
Compare N+ 1 ) and (TF,,F). At this time (T
FN-1) was greater than (TFoyo), so step (
Proceed from S4) to (S,) to continue cooling operation, and (TF
) continues to decrease, but when it becomes below (TFo-J), (Vt
) > (Vs), and the input terminal (INt) becomes "l", so proceed to step (SIl) and enter the compartment 6, which will be described later.
The temperature control of 4) is executed, and in step (S,), the output terminal (OUT,) becomes rhJ and the compressor (c) is stopped. After that, the temperature (TF) at the entrance of the freezer compartment gradually rises (
When TPO, F) or more, step (S, ) to (S4
) and at this time (TFw-J is less than (TFoy,), so proceed from step (Ss) to (S6) and compressor (
b) is up to f: when it stops.

After that, when the temperature rises further and reaches (TF,,I) or higher, the process proceeds from step (Sl) to step (C) and cooling operation is started again.The above process is repeated until the concave circle in the freezer compartment reaches an average of, for example, -20°C.
etc. is cooled down.

Figure 5 is a temperature control flowchart for the refrigerator room (seasonal temperature control). In step (S,), when the current temperature (TRI) is higher than the upper limit temperature (TRo*) such as +5°C, (Ve) > (V
s) and the input terminal (INs) is rhJ, so the process proceeds to step (S,), where the electromagnetic damper (g) is opened to supply cold air into the refrigerator compartment () 11. Then (TRu) becomes (
When TRo, l) or less, (S,) to (S+o) K
At this time, (TR-+) is above (TunJ), so the process proceeds to step (S8) and the electromagnetic damper (to) remains open. After that, (TR, l) is, for example, +1°C.
If it is less than (TR, , ), then (VJ > (Va)
The input terminal (IN) becomes ")" and the step (S
, ) to (81,) and the output terminal (OUT3) becomes "
h” and closes the electromagnetic damper (2). Even if (TR,) becomes greater than (TRoFr) again after that, (TRN−
1) was below (TRory), so step (S
,. ) to (So), and the electromagnetic damper (1) remains closed. Then (TR,l) becomes (TRo,,)
In this case, (Ve) > (Vs), the process proceeds from step (S7) to (S,) and the electromagnetic damper (G) is opened again. By repeating this, the inside of the refrigerator room (R1) is maintained at +3°C, etc.

Next, temperature control of compartment H will be explained with reference to FIGS. 6 and 7. FIG. 7 shows a 70-chart for switching the set temperature of compartment I. When the select switch (SW+) is closed, the process advances from step (StJ) to (S4), and the set temperature (TRI) of compartment 0 becomes the fruit temperature (TH,).

At this time, the upper limit temperature (TH, ) is -1℃, and the lower limit temperature (TH
o□) is -2°C, and the average temperature (TH,) is -1.5°C. This -1.5°C is the freezing storage temperature of fruits such as apples. Next K (when SW is closed, step (8 layers) to (S's) K advance (TH,) is the temperature for meat and fresh fish (T
H, ). At this time, the upper limit temperature (TH, ) is -0.5
℃, the lower limit temperature (THo F t) is -1.5°C, and the average temperature (THoFt) is -1°C. One 1°C is the freezing temperature storage temperature of meat, fresh fish, etc. When (SWs) is closed, (S
Since W, ) (SR) is open, proceed from step (814) to (8+a) and (TH,) is the temperature for vegetables (THv
), the upper limit temperature (TH, N) is 0℃, and the lower limit temperature (T
Ho, ) is -1℃, and the average temperature (TH,) is -0,
It becomes 5℃.

This -0.5°C is the frozen storage temperature of vegetables.

Here, the freezing temperature storage temperature is a temperature range that is below freezing but does not freeze the product. By storing the product at this temperature, the flavor will not be lost, there is no need to thaw it, and the product can be stored for a long period of time (experimental experiments). It can be stored for about a week.

Next, FIG. 6 is a flowchart of compartment I temperature control. In step (81?), the current temperature (THN) is set to (TH
,, ) or more, when (V4) > (Vl), input terminal (
Since the output terminal (INI) is rff, the process proceeds to step (Su), where the output terminal (OUTz) becomes [IN and the electromagnetic damper (to) is opened. Next, proceed to step (S+.) to determine whether or not the compressor (c) is in operation, and if it is, proceed to step (St.) to continue operating the blower (16) and stop it. If so, proceed to step (Stl), reduce the output "l" pulse width from the output terminal (OUT4), and operate the blower Q61 at a lower rotational speed. After that (THN
) falls below (TH,,), the process advances from step (Sty) to (So) to (Sts). At this time, (THN-1) becomes (
THO,), so from step (St3) to (
81! Proceed to +). Then (THN) (THOFy)
If the following happens, (■,) > (V4), so step (
Proceed to step S8) to close the electromagnetic damper G5), then judge in step (Sya) whether or not the compressor (c) is in operation, and if it is, proceed to step (S2Q) to close the blower (1).
61 as it is, and if it is stopped, step (Sz
Proceed to a) and stop the blower (1). Electromagnetic damper 0
9 is closed and the temperature (THN) inside the compartment σ increases and becomes higher than (TH,, F), the process proceeds from step (SzJ to (S ts ), but ('r)1.-,) (TH
, □), so from step (S ts ) to (
The process advances to step S24) and the electromagnetic damper (t) remains closed.

When the temperature (THN) rises at the rear and exceeds (THO,,), the step (Ssy) changes to the step (Sts).
Proceed to , open electromagnetic damper C39, and repeat. In this way, the electromagnetic damper (c) and the blower α0 are controlled, and the select switch (SW+) (8Wt) is activated in compartment 1.
(SWs) Desired set temperature (THI) set by K
On average, the temperature will be controlled even more quickly.

As described above, the inside of the compartment 0 is maintained at the freezing temperature storage temperature by indirect cooling from the cold air passage Ql, so that the food can be stored for a relatively long period of time without losing its flavor. In addition, since indirect cooling is used, drying of the food is also suppressed.

Furthermore, the temperature inside the compartment is precisely controlled by an electromagnetic damper C351, and when the electromagnetic damper 01 is opened, the blower αQ is operated even if the compressor (c) is stopped, thereby cooling the old freezer compartment. is sufficient, so that even when the heat load in the compartment ([(+) increases, insufficient cooling will occur in the compartment. Also, if the compressor (c) is stopped and
p! When 19 is opened, the fan Oe is operated at a lower rotational speed, so that supercooling in the old freezer compartment is also reduced.

Furthermore, the set temperature in compartment 1 can be changed depending on the type of stored food, and can be set to the respective ice temperature storage temperature, so that food can be preserved even better.

(F) Effects of the Invention According to the present invention, the temperature of each compartment is concentrated by a temperature control device having a sensor that detects the temperature of each compartment of a refrigerator-freezer having a freezing compartment, a refrigerating compartment, and a compartment. Each temperature can be accurately controlled independently. Furthermore, since the interior of the compartment is kept at a temperature below freezing but at a temperature at which the food does not freeze, that is, at a freezing storage temperature, the food can be stored for a relatively long period of time without losing its flavor.

[Brief explanation of drawings]

Each figure shows an embodiment of the present invention. Figure 1 is an enlarged cross-sectional view of the rear part of the compartment, Figure 2 is an electric circuit diagram, and Figure 3 is an electrical circuit diagram of the rear section of the compartment.
4 to 7 are flowcharts showing the software of the microcomputer, and FIG. 8 is a schematic side sectional view of the refrigerator-freezer. Old... Freezer room, (R1... Refrigerator room, ([(+・
... Compartment room, Q51... Cooler, (16'l...
Blower, (4)...Compressor, 051(G)...Electromagnetic damper, (4G river usage control device, (4!l(A))
6υ...Thermistor. Applicant Sanyo Electric Co., Ltd. and 1 other representative Patent attorney Masao Sano iX+”1 Figure 3 Figure 6 Figure 8

Claims (1)

[Claims] 1. In a refrigerator in which the interior of the refrigerator is divided by a partition wall to form a freezer compartment and a refrigerator compartment, and the cold air from the cooler is supplied to each compartment by a blower for cooling, the compartments are formed in the refrigerator. A temperature control device is provided that has a compartment, and a sensor that detects the temperature of each of the freezing compartment, the refrigerator compartment, and the compartment, and the temperature control device controls the blower and compressor based on the sensor of the freezing compartment. , adjusting the amount of cold air discharged into the room based on a sensor in the refrigerator compartment, and storing an ice temperature in the compartment by adjusting the amount of cold air to cool the compartment based on the sensor in the compartment. A refrigerator/freezer that controls temperature.