JPS60216168A - 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-freezer in which a blower is used to forcefully circulate cold air in the refrigerator, in which compartments are formed.

(b) Prior Art A conventional compartment of this type is shown in, for example, Japanese Utility Model Application No. 58-22678. According to this publication, a closed storage chamber is formed within the refrigerator compartment, a cold air passage is formed around this storage chamber, and cold air from a blower is introduced into this cold air passage to trap and cool the room without drying it out. . Indoor temperature control is achieved by adjusting the amount of cold air supplied to the cold air passages using damper plates.

Conventionally, this type of compartment is controlled at a freezing temperature similar to that of a freezer, or at a temperature of +lU to +2C, which is slightly lower than the temperature of a refrigerator, and is used to store and preserve food that quickly spoils, such as food or fish. However, although freezing food can preserve food for a long time, it has the disadvantage that the flavor is lost when thawing it for cooking, and the flavor is not lost when it is controlled by +IC to +2C. However, it has the disadvantage of a short shelf life, and for this reason, methods of storing foods at freezing storage temperatures have recently been considered. This freezing storage temperature is below freezing, but just before the food freezes. By storing food at this temperature, the growth of bacteria can be suppressed and the food can be stored for a relatively long period of time without freezing. , which has the advantage that the flavor of the food is not impaired. However, in the configuration as disclosed in the above-mentioned publication, since the storage chamber and the refrigerating chamber are in a heat exchange relationship, it is difficult to accurately control the temperature in the storage chamber within the relatively narrow temperature range of ice temperature storage temperature.

(C) Purpose of the Invention The present invention provides a refrigerator-freezer in which cold air is supplied and circulated inside the refrigerator by a blower, and a compartment is formed in the interior of the refrigerator to control the room to an ice temperature storage temperature, but the temperature is precisely controlled. The goal is to provide the following.

2) Structure of the Invention The present invention provides a cooling system that cools the refrigerator by sending cold air cooled by a cooler installed in the cooling chamber and circulating it inside the refrigerator using a fan. A cold air supply path that supplies cold air to each chamber and a cold air return path that communicates each chamber with the cold air intake side of the cooling chamber are provided, and the divided chamber is maintained at an ice temperature storage temperature. It is designed to cool down to .

An embodiment will be described 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 made of steel plate (2) and an inner box made of synthetic resin (3) with an internal pressure interval.
Incorporate the urethane insulation material (4) between both boxes (21 (31)
) is foam-filled to form an insulating box. The inside of the refrigerator-freezer (1) is partitioned with a partition wall (5) K filled with insulation material.
Therefore, it is divided into upper and lower parts, with the upper part being the freezer compartment [F] which is cooled to freezing temperature (for example -20C), and the lower part being the cold room [F] which is above the freezing point. It forms a refrigerator compartment (L) that is maintained at a temperature (for example, +3C).The opening edge of the refrigerator compartment (8), which is part of the interior of the refrigerator-freezer (11), has partitions extending from left to right. A member (8) is installed, and this partition front member (8)
A concave groove (3a) formed in the inner box (3) at approximately the same height as this.
) is supported by a heat insulating partition plate (9), and the refrigerator compartment ()υ is divided into upper and lower sections by this partition plate (9). In the space above the partition plate (9), a cold air passage αQ is formed with a space between the lower surface of the partition wall (5), the upper surface of the partition plate (9), both sides of the inner box (3), and the rear side, and a space for storing metal, etc. A box-shaped case 01) made of a heat-conducting material and opened at the front is incorporated. Opening of case 0υ] The edges are the inner box (3), the partition wall (5
) and the partition plate (9), thereby forming a compartment al communicating only with the outside of the refrigerator in this case Ql), and the front end of the cold air passage (11) is closed. The compartment (G), the refrigerator compartment (F), and the compartment I are mutually insulated.There is a space above the partition wall (5), and the freezer compartment (F) has a heat insulating material on the bottom surface. ) is provided, and a cooling chamber I is formed between the bottom plate (13) and the partition wall (5). A cooler Q51 included in the refrigeration cycle is housed and installed in this cooling chamber 04). A blower (161) is provided behind this cooler 09. A motor (16M) that drives the blower (Io) is connected to the cooling chamber (14
It is stored in a storage box 0η located behind the outer box (2) and embedded inside the insulation material (4), which is attached to the inside of the back surface of the outer box (2), and the rotating shaft is connected to the storage box aη, the insulation material (4), and the insulation material (4). Inner box (3)
The internal pressure of the cooling chamber Q4) is exposed through it, and a blower fan (16F) is attached to the tip of the cooling chamber Q4). The blower Q61 rotates and sucks in cold air from the direction of the rotating shaft and blows it out in the radial direction. It is. The bottom plate of the south side of the freezer (the rear side of Li (13a)
) rises upward with a space between it and the rear surface of the inner box (3), forming a duct that communicates the rear part of the cooling chamber with the freezer compartment (Fl), and the cold air accelerated by °C passing through the blower is Freezer compartment (G) K is discharged from the discharge port (18a) at the tip of the duct 0 barrel.

The recess is a duct member that forms a duct that communicates the rear part of the cooling chamber (14) and the cold air passage Ql, and the cold air accelerated by the blower (161) is passed through the cold air passage A [formed at the upper part of the rear surface of the rear inner box (3). The cold air passage (II
discharged inside. (21) is a duct that communicates between the rear part of the cooling room 041 and the refrigerator compartment (river), and cold air is discharged from the discharge port (21a) into the refrigerator compartment (river room).
The cold air circulating in the freezer compartment (2) is cooled by direct cooling, and the compartment compartment (1-1+ is cooled by indirect cooling from the case aυ).
c) respectively return to the cooling chamber I. Refrigerator (1)
Inside the insulation material (4) on the side wall of No. 1 is a refrigerator compartment (shun and cooling compartment
) A return duct (to) is formed that connects the front part.
The cold air in the refrigerator compartment +It) passes through this and returns to the cooling compartment Q41 from the suction port (c). (26J is a compressor included in the refrigeration cycle, c27 ((c) 1 each chamber t)'
)H) It is a crime to freely open and close the front opening of @.

The amount of cold air discharged from the discharge ports (20a) and (21a) is controlled to open and close by electromagnetic dampers (c) and (to). Here, the electromagnetic dampers (c) and (g) may be provided at the intake port @Q1, respectively. The electromagnetic damper (c) is composed of a plunger (not shown), an electromagnetic coil (35A), an arm 07), and a buckle plate attached to the tip of the arm 07) to open and close the discharge port (20a). (Electromagnetic damper (g)
has a similar configuration. ) Figure 2 shows the electrical circuit diagram of the temperature control device. θ
I! (42 (43) Gt) The compressor motor (26M) and electromagnetic damper 05) form a series circuit with the electromagnetic coils (35A) and (36A) of O119, respectively, and are connected to an alternating current power source (AC). (9) is a transistor connected in series with the blower motor (16M) to the DC power supply (V
aC). (451 is a well-known microcomputer and its output terminal (OUT+) (OUT2
) (OUT Ts ) (OUT4) is connected to the triac (41J (4a (43 gate and transistor (410 pace). (46) t47) (4
It is a comparator consisting of an operational amplifier, and its output terminal is connected to the input terminal (INI) (INfi) of the microcomputer (451).
491 (5I61) are respectively compartment U and freezing room [F]
and a thermistor (negative resistance element) as a sensor that senses the temperature inside the refrigerator compartment (8), and the thermistor (4!
The terminal potentials (Vl) (V2) (Vs) of the comparators (46), 147, and (48) are connected to the inverting input terminals (→) of the comparators (46), 147, and (48), respectively.
(The non-inverting input terminal +H of 48 has a set potential (■,) (■6
) is input. (r, ) (rt) (r-) is a resistor, connected in series, select switch (SWz)
is the resistance (r3), (SWI) is the resistance (r, ) and (r3
) (The select switch (SWI) is not shown, but it is a switch that opens the switches (8%) (SWs) at the same time.), and its terminal potential (■,
) is connected to the non-inverting input terminal (G) of the comparator (4al). The triask (4υ(42) (4, 1) is connected to the non-inverting input terminal (G) of the comparator (4al). 35A) (3
6A).

The electromagnetic coils (35A) (36A) are energized, the electromagnetic damper oi06) operates, and the respective discharge ports (20a) (2
] a) is opened, and in the de-energized state, the discharge port (20a) (2
1a) is closed. The output terminal (OUT) of the transistor (44141 microcomputer (451) is conductive during a low potential (hereinafter referred to as J) and the motor (16M)
The output terminal (OUT4) K
By changing the generated output pulse width, the motor (
The number of revolutions of the 16mm engine will also be changed. Comparator (461(
4η(ll mark has a predetermined hysteresis, and the comparator (4G) outputs a high potential (r
It is called hJ. ), the voltage drops to (V4)<(Vl), and the output becomes "l". The potential (■4) is set by the switch (
By switching SWI ) (SWI ) (SWs ), it can be changed to three types of values. Comparator (47
), the temperature (TF) of the freezer compartment (F) rises (Vs)
> (Vz), the output becomes "h", and the descending state (
■ll)<(v2) Set rlJ. Similarly, the temperature (TR, l) of the refrigerating room (6) of the comparator (4 barrels) rises and becomes (Va) > (Vs), and the output becomes rhJ and falls, and (Va) < (Va), "l ”.

Figure 3 shows a functional block diagram of the temperature control device (4G. @561 (57) is thermistor elt (
1 (491 (5υ), etc., are the freezer room temperature detection means, compartment room temperature detection means, and freezer room temperature detection means, and □□□ is the switch (SWI) (sWt) (SWs) and the resistance (r, ) (r , ) (r, ) etc. t51 is ORge) , [1a15B&l) t!
SotL Sott Tiger 47 y Ri (41), transistor (44,) Liac (42 (431, etc.), motor (26M) (16M), electromagnetic coil (35A
) (36A). The comparator (47) compares a predetermined set value with the information from the freezer compartment temperature detection means 6■, operates the switching means -6υ, and energizes the motors (26M) (16M)K. The comparator ■ compares the information from the compartment temperature detection means (g) and the compartment temperature setting means (to) and operates the switching means 111+6a to energize the motor (16M) and the electromagnetic coil (35A). When the output of (47) is IA'J, the switching means II) is switched to the motor (
16M) and operate at ℃. Comparing the predetermined setting value with the information from the refrigerating room temperature detection means 5η, the comparator operates the switching means 11 and operates the electromagnetic coil (3
6A) for 1L.

Figures 4 to 7 are flowcharts showing the software of the microcomputer (451), and the operation will be explained along these lines. Figure 4 is a temperature control flowchart of the freezer compartment (Fl), and ('r FN) CT FN-1) 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 processing is performed, CT FN-1) is the temperature at the time of the previous sampling. The current temperature (TFN) shall be stored instead of the temperature (TFN-+) of the refrigerator compartment (6).
The same applies to the temperature (TR) in ) and the temperature (TH)K in compartment I.

For example, if the current temperature (TFll) at step (St) is -
When the upper limit temperature (TF, , ) is higher than 18℃ etc. (Vl)>
(V, ), and the input terminal (IN2) of the microcomputer (49) is rhJ, so the step (St)
K advances, output terminal (OUTI) (OUT4) is rJJ
Then, the triac υ and the transistor (44J are triggered to operate the compressor (4) and the blower ae, and a cooling operation is executed. As a result of this cooling operation, the temperature (TF) decreases and becomes lower than TFI)N). The process proceeds from step (S,) to step (S,), where it is compared with the lower limit temperature (T F oyy ) such as -220, and if it is higher, the process proceeds to step (S4) and the temperature at the previous sampling (TF oyy ) is compared.
Compare N-1) and ('rp ovF). At this time, (TFN-1) was above (TF, N), so from step (S4) (S) VC proceeded and continued the cooling operation, although (TF) continued to decrease (T F OFF ).
Below, (Vri>(Vs), and the input terminal (I
Nt) becomes rl'', so proceed to step (S,), execute temperature control of compartment 0, which will be described later, and step (S,).
6), the output terminal (OUT,) becomes "h" and compressor 1
26). After that, the temperature (TF
) gradually increases and becomes equal to or higher than (TForr), proceeding from step (S, ) to (S4), and at this time (TFN-1) is equal to or lower than (T F ovr ), so step (S,)
The process then proceeds to (S6) and the compressor Qe remains stopped.

After that, when the temperature rises to (TF,,) or more, the process advances from step (S,) to (S,) and cooling operation is started again.
2 (cooled to 1st grade).

FIG. 5 is a temperature control flowchart for the refrigerator compartment (6), in which the current temperature (TRN) is set to +5, for example, in step (S,).
When the temperature is higher than the upper limit temperature ('r Roll ) of C, etc., (VS
) > (v3) and the input terminal (INS) is rhJ, so the program proceeds to the state (S8) and opens the electromagnetic damper (to) to supply cold air into the refrigerator compartment (R1. Then, (TR
When N) becomes less than (T RON ), (S,) to (S
ho), and at this time ('rtt*-+) becomes (TRO,
), the electromagnetic damper (to) remains open after step (Sa) K. Then (TR, t
) becomes less than ('r R=yv ) of +IC, for example, (Vs) > (Va) and the input terminal (INs)
becomes "NO", progresses from step (S, ) to (So)K, the output terminal (OUTs) becomes rhJ, and the electromagnetic damper (to) is closed. Then (TRN) again becomes (TR,y
, ) Even if (TRI-1) becomes (T ROFF
), so from step (S+.) to (81
Proceeding to step 1), the electromagnetic damper (g) remains closed.

After that, when (T RN ) becomes more than (TR,,), (V
Since e)>(Vs), from step (S,) to (8M
) K and open the electromagnetic damper (to) again. By repeating this, the inside of the refrigerator compartment (6) is maintained at +3C or the like.

Next, temperature control of compartment 0 will be explained with reference to FIGS. 6 and 7. FIG. 7 shows a flowchart for switching the set temperature of compartment 0. When the select switch (SWI) is closed, the VC advances from step (S, , ) to (s+5) and the set temperature (THIl) of compartment I is the fruit temperature (THF).
becomes. At this time, the upper limit temperature (THoN) is -lC1, the lower limit temperature (TH,,) is -2C, and the average temperature (THρ is -1,
5t:'. This -1.5C is the freezing storage temperature of fruits such as apples. When the next K (SW, ) is closed, the K progresses from step (814) to (S+s) (THρ becomes the temperature for meat and fresh fish (TH yo). At this time, the upper limit temperature (THo,)
is -0,5C1 lower limit temperature (THoyr) is -1,5t
:', and the average temperature (THw) becomes -IC.

This -IC is the freezing storage temperature of meat, fresh fish, etc.

When (SWS) is closed, (8%) (s wt) is open, so proceed from step (814) to (S16), and (T11.) becomes the temperature for vegetables (THv).
The upper limit temperature (TI-(,,,) is the lower limit temperature of OC1 (THo
vv) becomes -IC and the average temperature (TH,) is -〇, 5
It becomes C. This -0.5C is the ice temperature needle for vegetables! 1L temperature. In this way, the ice space is constructed.

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 αI temperature control. Current temperature ('r H=,) at step (S+t)
is greater than (T l”1ON), (V4) > (Vl
), the input terminal (INI) is rhJ, so step (
Proceed to S4), the output terminal (OUT, ) becomes "L" and the electromagnetic damper 09 is opened. Next, proceed to step (S1o) and compressor c! Determine whether or not (i) is in operation. If it is in operation, proceed to step (S or) K and continue to operate the blower αe; if it is stopped at ℃, step (SKI)
vc advances, the output r/J pulse width from the output terminal (OUT4) is made smaller, and the rotational speed of the first paper feed machine α is lowered and operated. After that, when (TH,) falls below (THON), the process advances from step (S l?) to (sty) to (StS), and at this time (THN -+) is greater than (THO,), so step (StS) Proceed to (SSS). After that, when (THN) becomes less than (T Hot-), (Vl
) > (V4), so go to step (S24)K and close the electromagnetic damper 051, then judge in step (S!!!) whether the compressor (4) is in operation or not. Proceeding to step (S9), the blower side is operated as it is, and if it is stopped, the process proceeds to step (S) to stop the blower αe. After the electromagnetic damper closes, the temperature (TH,) inside compartment 0 rises (TH(let >
When it gets higher, it moves from step (sty) to (StS), but since (TH, -1) is less than (T Hoyy), it moves from step (Sts) to (spa) and 11 magnetic damper (c) remains closed. There is even. Then add temperature ('
When rn,) increases to exceed ('rno-), the process proceeds from step (SIT) to step (S+s), opens the electromagnetic damper (c), and repeats the process. In this way, the electromagnetic damper and the blower tte are controlled, and the temperature inside the compartment I is controlled on average to the desired set temperature (TH,)K set by the select switches (SWI) (SWt) (SWa). I'm busy.

As described above, the interior of the compartment 0 is maintained at the freezing storage temperature by indirect cooling from the cold air passage QOI, 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 trap temperature inside compartment 0 is accurately controlled by the electromagnetic damper (c) trap, and when the electromagnetic damper C351 opens, the blower QfD is operated even if the compressor (e) is stopped, so ) is sufficiently cooled so that even when the heat load in compartment 0 increases, insufficient cooling does not occur in compartment 0. Moreover, when the compressor (c) is stopped and the electromagnetic damper 0 clause is opened, the rotation speed on the blower side is lowered and the operation is performed, so that the supercooling of the south side of the refrigerator is also reduced.

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

(f) Effects of the Invention According to the present invention, in a refrigerator-freezer that has compartments and circulates cold air inside the refrigerator, the freezing compartment, the refrigerator compartment, and the compartments are each insulated, and the cold air does not flow through the cooling compartment. Since there is no circulation, the temperature does not affect each other, so the temperature of each room is controlled independently. Moreover, since the compartments are controlled at ice temperature storage temperature, food can be stored for a relatively long period of time without losing its flavor.Also, this temperature control is also accurate due to the above-mentioned configuration, so food can remain stable for a long period of time. Conservation will be achieved.

[Brief explanation of the drawing]

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 refrigerated cold rail storage. (G)... Freezer room, (6)... Refrigerator room, a].
-・Compartment room, (5)・Partition wall, (9)・・Partition plate, ■・・Cooling room, (15+・・Cooler, (l
19cl(21)...Duct, (2)...Return duct. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Shizuo Sano No. 1 Civil Figure 2, -40 No. (-Figure jIs figure

Claims (1)

[Claims] 1. In the case of cooling by circulating cold air cooled by a cooler installed in the cooling room into the refrigerator using a blower,
A cold air supply path that respectively insulates and partitions the inside of the refrigerator to form a freezing room, a refrigerator room, and a compartment, and supplies the cold air to each of the rooms, and a cold air intake side of each of the rooms and the cooling room. and a cold air return path communicating with each other, and the compartment is configured to be cooled to an ice temperature storage temperature.