JPS60233479A - 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 cooled by a cooler is circulated within the refrigerator, with compartments 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 sealed storage chamber is formed within the refrigerator compartment, a cold air passage is formed around the storage chamber, and cold air from a blower is introduced into the cold air passage 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 room, or at a temperature of +1'C to +2°C, which is slightly lower than the temperature of a refrigerator room, and is usually used to store and preserve food that quickly spoils, such as food or fish. Although freezing foods can preserve food for a long time, it has the disadvantage that the flavor is lost when thawing it for cooking, and it also
Although the flavor is not impaired by this control, it has the disadvantage of a short shelf life. (C) Purpose of the Invention The present invention forms a compartment in the refrigerator which circulates cold air cooled by a cooler to cool the refrigerator, maintains the compartment at an ice storage temperature, and maintains the temperature at this temperature. The objective is to provide a refrigerator with improved controllability. (b) Structure of the Invention The present invention forms compartments in the interior of a refrigerator that circulates cold air cooled by a cooler into the compartment by a main blower, and provides a cold air passage for cooling the compartments. In addition, an auxiliary blower for forcibly circulating the cold air into the cold air passage is provided, and a predetermined temperature control device is provided so that the auxiliary blower is operated to maintain the temperature within the room in one compartment within the freezing temperature storage temperature range. It is composed of . (E) Embodiment An embodiment will be explained with reference to the drawings. Figure 8 is a refrigerator (1)
A cross-sectional view of the is shown. The refrigerator (1) has an outer box made of steel plate (
2) An inner box (3) made of synthetic resin is installed with a gap between the two boxes (21 (31), and a urethane insulating material (4) is foamed and filled between the two boxes (31) to form a heat insulating box. The interior of the refrigerator (1) is divided into upper and lower parts by a partition wall (5) filled with insulating material, with the upper part being the freezer compartment that is cooled to freezing temperatures (e.g. -20°C), and the lower part being above the freezing temperature. The refrigerator compartment (8) is maintained at a refrigerating temperature (for example, +3°C).The refrigerator compartment (8) is a part of the interior of the refrigerator (1). A partition front member (8) is installed, and an inner box (
A heat-insulating partition plate (9) is attached, supported by the groove (3a) formed in ) In the space above the partition wall (5), the lower surface of the partition plate (9), the upper surface of the partition plate (9), the inner box (3) both sides, and the rear surface are spaced apart to form a cold air passage lI, and a heat conductive material such as metal is formed. A box-shaped case 0]) made of materials and opened at the front is incorporated. The opening edge of the case (111) is brought into contact with the inner box (3), the partition wall (5), and the partition plate (9), thereby forming a compartment ■ in this case 01 that communicates only with the outside of the refrigerator. and cold air passage 0Ω
The front end of is occluded. Above the partition wall (5), a bottom plate of the freezer compartment [F] having a heat insulating material on the lower surface is provided with a gap, and this bottom plate (I3
A cooling chamber side is formed between 1 and the partition wall (5). In this cooling chamber I, two coolers included in the refrigeration cycle are housed and installed, and this cooler (151 located behind the main blower
e is provided. Motor (16) that drives the main blower αe
M) is a storage box located at the rear of the cooling room side, attached to the inside of the back of the outer box (2), and embedded in the insulation material (4).
The rotating shaft is stored inside the storage box (171, insulation material (4)
The main blower (161 rotates and sucks cold air from the direction of the rotation axis,
It blows out in the radial direction. Freezer compartment [F] bottom plate 0
The rear side (13a) of 31 rises upward with a gap from the rear surface of the inner box (3), and forms a duct (1119) that communicates the rear of the cooling chamber (+41) and the freezer compartment (1119), and connects the main blower Q6.
The cold air accelerated by duct 1 is discharged into the freezer compartment from the discharge port (18a) at the tip of duct 181.
is attached to the back of the inner box (3), and connects the rear part of the cooling chamber (14) with the refrigerator compartment (a duct member that forms a wave. The cold air accelerated by the main blower Q61 passes through the duct ■, Refrigerator room (discharge port (20
a) From the cold storage room (discharged into the ship.Cold air passage f101
A discharge port (20b) that communicates the cold air passage (101) with the middle part of the duct (2) is formed at the upper rear surface of the rear inner box (3).The amount of cold air discharged from the discharge port (2Oa) is determined by the electromagnetic damper c3.
5). Electromagnetic damper 6 cases (
A plunger (not shown) and an electromagnetic coil (35A), which are not shown, are housed in a baffle plate (20a) that is fixed to the tip of an arm attached to the plunger and opens and closes the discharge port (20a).
to). Clause C3 is an auxiliary blower provided behind the discharge port (20b). The motor that drives the auxiliary blower (
39M) is located behind the discharge port (20b) and the outer box (2)
It is stored inside the storage box (40) attached to the inside of the back and embedded in the insulation material (4), and the rotating shaft passes through the storage box (40, the insulation material (4) and the duct member α) and is inserted into the duct m. A blower fan (39F) is attached to the tip of the fan.The auxiliary blower rotates and blows out some of the cold air flowing down the duct (A) forward, and connects it to the outlet (20b).
The cold air is circulated through the cold air passage (101).In this way, the cold air is discharged into each chamber (Fl(R) and the cold air passage (11), and the cold air circulating through the freezer compartment old and the cold air passage aα is circulated through the freezer compartment (2). After the compartment 0 is cooled by direct cooling, and the compartment 0 is cooled by indirect cooling from the case circle, the cold air intake port C!21 (from 23+, respectively,
to return to. A return duct (24) that communicates the refrigerator compartment (2) and the cooling compartment (+41 front part) is formed in the insulation material (4) on the side wall of the refrigerator (1). The cold air returns to the cooling chamber (1) from the inlet (c).
G) is a compressor included in the refrigeration cycle, and ＠＠翰 is a door that can freely open and close the front opening of chamber I0. Figure 2 shows the electrical circuit diagram of the temperature control device (TC). (4υ (42 (43 is a triac), each includes a compressor motor (26M), an electromagnetic damper (39 electromagnetic coils)
35A) and the main blower motor (16M), each connected to an alternating current power source (AC). (The auxiliary blower motor (39M) is connected to the DC power supply (cc) in series with a transistor. (The four terminals are well-known microcomputers, and their output terminals (OUT+)
The gate of the triac (4υ(421(431) and the pace of the transistor (44) are connected to T2)(0UT3)(0UT4).(4604η(4)
g1 is a comparator composed of an operational amplifier, and its output terminal is connected to the microcomputer (four input terminals (INI) (IN,) (IN,). Thermistor (49) is a thermistor (negative resistance element) as a sensor that detects the temperature in the freezer compartment and refrigerator compartment (8).
60) (51) terminal potential (v+) (V2) (vs
) are respectively connected to the inverting input terminal H of the comparator (461 (4η)). (r,) (r2) (r3) are resistors connected in series, and the select switch (SW2) is connected to the resistor (r3).
(SW, ) is connected in parallel to resistors (r2) and (r3) (select switch (SW, ) is not shown, but it is a switch that simultaneously opens switches C5w2 and (SW3). ), its terminal potential (v4) is connected to the non-inverting input terminal (1) of the comparator. Triac (4υ(
43 (43) is a microcomputer (phrase) that triggers the gate to conduct and energize the motor (26M), electromagnetic coil (35A), and motor (16M).The electromagnetic coil (35A) is energized and the electromagnetic damper (ha) ) works and
The discharge port (20a) is opened, and the discharge port (20a) is closed in the de-energized state.
0a) is closed. The transistor (44) is conductive while the output terminal (OUT) is at a low potential (hereinafter referred to as rAJ) to operate the motor (39M). The comparator (461 (4η) has a predetermined hysteresis, and the comparator (46) has a temperature (T
When H, ) rises and becomes (V4) > (V, ), the output becomes a high potential (hereinafter referred to as rhJ) and falls to (V, K
(V, ), and the output becomes rJJ. The potential (V,) is changed to three types of values by switching the switches (SW,) (SW2) (SW,). The comparator (47) causes the temperature (TF, l) of the freezer compartment (Fl) to rise and become (V,)>(V,), making the output rhJ, and then decrease to become (V,)<(V2). Similarly, the comparator (mark 4 is the refrigerator compartment (R)) (7) temperature (T R
, ) rises, Te (Ve ) > (Va) becomes higher, and the output becomes rhJ, and it falls, and (V, K (V3) becomes rJJ. Figure 3 shows the temperature control device (TC). A functional block diagram is shown. 551 (511957) is a freezing room temperature detecting means, a compartment room temperature detecting means, and a refrigerator room temperature detecting means, each including a thermistor (5ω(49)r51) etc.
ei81G switch (SW,) (SW2) C8W
%) and resistances (r+) (r-) (r3), etc. -11) @21 (631 is a triac (43 (4υ), transistor (44)
, triac (421 etc.), each motor (1
6M) (26M) (39M), electromagnetic coil (35A
). comparator(
47) compares a predetermined set value with the information from the freezer compartment temperature detection means 69 and operates the switching means (6011υ to energize the motors (16M) (26M). The comparator (4Gl is the compartment temperature detection means) (g) and the information from the compartment temperature setting means 15 and operating the switching means 12 to energize the motor (39M).
) and operates the switching means (63) to energize the electromagnetic coil (35A). Figures 4 to 7 are flowcharts showing the software of the microcomputer (49), and the operation will be explained along these lines. Figure 4 is a temperature control flowchart of the freezer compartment (n), and (TF,) At the old temperature of the freezer compartment, (T
F,1) is the temperature at the previous sampling time, and
Sampling is performed at power-on and when each set temperature is crossed, and after performing processing operations, the current temperature (TF
, ) shall be stored. From then on, the temperature of the refrigerator compartment (R1)
The same applies to TR) and the temperature of compartment 0 (TH). For example, if the current temperature (TF,) in step (S,) is −
When the temperature is higher than the upper limit temperature (TFo, ) such as 18°C, (V5
) > (Vt) Tonatte microcomputer (4
! Since the input terminal (IN, ) of 9 is rhJ, the process proceeds to step (S2) and the output terminal (OUT, ) (OUT3
) becomes rJJ and triggers the triac (41) and triac (43) to operate the compressor and the main blower utuc- to perform a cooling operation.This cooling operation causes the temperature (TF, ) to drop and TF, ), the process progresses from step (Sl) to step (S, ), where -22℃
If it is higher than the lower limit temperature (TF, , ), the process proceeds to step (S,) and compares the temperature (TFN-,) at the previous sampling time with (TF ory ). At this time, (TF, -1> was greater than or equal to (TF,,l), so proceed from step (S,) to (S,) to continue cooling operation, and although (TF) continued to decrease, CTPOll> or less Then, <■Z)>(V, ), and the input terminal (IN
, ) becomes rlJ, the process proceeds to step (S,) and the main blower αe and compressor are stopped. After that, when the temperature (TF) of the freezer compartment (n) gradually rises and exceeds (TFory), the process proceeds from step (S,) to (S4).
*−+ ) is less than or equal to (TF,,,), so the step (
The compressor (4) and the main blower (161 remain stopped).Then, when the temperature rises further and the temperature exceeds (TF, ,), the process advances from step (S,) to (S2) and cools down again. Operation is started.Repeat the above steps until the freezer compartment (inside E is on average, for example -2
It is cooled to 0°C or the like. FIG. 5 is a temperature control flowchart for the refrigerator room (temperature control). In step (S7), the current temperature (T R *)
When the temperature is higher than the upper limit temperature (TR, , ) such as °C, (Ve)>(■
3), and the input terminal (INs) is rhJ, so proceed to step (S,), open the electromagnetic damper C15+, and supply cold air to the refrigerator compartment (Winai). After that, (TR,) becomes (T
RoN) or lower, proceed from (S,) to (S, O),
At this time, since (T &-+) is higher than (TR,,), the process proceeds to step (S8) and the electromagnetic damper t3 remains open. After that, when (TR,) becomes less than (TROyr) such as +l'C, the input terminal (INS) becomes rJJ and step (S9
) to (8+1) and the output terminal (OUT2) is r
hJ and close the electromagnetic damper (c). After that, even if (TR,) becomes more than (TR,,,) again, (TR,1
-t) was below (TR,,,), so step (
Proceeding from Sso) to (So), electromagnetic Danno<-aS remains closed. After that, when (TR,) becomes more than (TR,,), (VI ri>(Vs)), so step (S
, ) to (S,)K and open the electromagnetic damper (g) again. By repeating this, the inside of the refrigerator compartment (R) is maintained at +3°C or the like. Next, temperature control of compartment I will be explained with reference to FIGS. 6 and 7. FIG. 7 shows a flowchart for switching the set temperature of the compartment (2). When the select switch (SWI) is closed, the process advances from step (S, 2) to (Sts), and the set temperature (TH,) of compartment 0 is changed to the fruit temperature (TH,
). At this time, the upper limit temperature (THo,) is -1°C, the lower limit temperature (TH, , ) 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, when (SW, ) is closed, the process proceeds from step (S, 4) to (S+ll), and (TH,) becomes the temperature for meat and fresh fish (THM). At this time, the upper limit temperature (
THo,) is -0.5℃, lower limit temperature (THo F F
) is -1.5°C, and the average temperature (THM) is -1°C. This -1°C is the freezing storage temperature for meat, fresh fish, etc. When (SW, ) is closed, (SW, ) (Sl2) is open, so proceed from step (814) to (S,, ) and (
TH,) is the temperature for vegetables (THv), and the upper limit temperature (
TH,,) is 0°C, the lower limit temperature (TH,,) is -1°C, and the average temperature (TH,) is -0.5°C. This -0
, 5℃ is the freezing storage temperature of vegetables. In this way, an ice temperature storage 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 the temperature control of the compartment αl. In step (817), the current temperature (TH,) is (
When the voltage is above TH, , ), the input terminal (
Since IN,) is rhJ, proceed to step (Sts), set the output terminal (OUT4) to r/J, and operate the auxiliary blower (3I).After that, when (THN) falls below (TH,,), step (Sts ) to (Sto) (S
2゜), and at this time (THN I) becomes (T Ha N
), so from step (S2.) to (S□)
Proceed to. After that, when (TH,) becomes less than (THoyy), (V,)>(V4), so proceed to step (821) and turn on the auxiliary blower G! Stop J. After that, when the temperature (TH,) in compartment 0 rises and becomes higher than (THo,, ), the process proceeds from step (Sho) to (S20), but (THw -1) is less than (TH,,, ). Since there was, I proceeded to step (Stt) and pulled the auxiliary blower G and kept it stopped. After that, the temperature (THN) increases on the page (
When the temperature exceeds THo*), the process proceeds from step (s+'r) to (S,A), the auxiliary blower OI is operated, and the process is repeated thereafter. In this way, the selection switch (
The temperature is controlled on average to the desired set temperature (TH,) set by SW, ) (s'L) (SW3). As mentioned above, the inside of compartment 0 is maintained at freezing temperature storage temperature by indirect cooling from cold air passage (1). Therefore, drying of the food is also suppressed.Furthermore, compartment 0 is insulated from other internal spaces by a partition plate (9) or a partition wall (5), etc., and the auxiliary fan 01 is controlled by the temperature of compartment I. Therefore, the temperature of compartment 0 can be maintained stably and well in the relatively narrow ice temperature storage temperature range.Furthermore, the set temperature in compartment B can be changed depending on the type of food stored, and each ice Since it can be set to a warm storage temperature, food can be stored even better.Furthermore, when the temperature in compartment 0 rises, only the auxiliary blower OI is operated, so it can be used while the compressor is stopped. The cooler (151) can effectively utilize the residual cold air around it, and the increase in energy consumption can be kept to a minimum. In other words, since the storage temperature is at freezing temperature, small fish that impair the flavor of the food (can be stored for a relatively long period of time.
An auxiliary blower is provided for cooling the compartment, and its operation is controlled to control the temperature of the compartment, so the temperature inside the compartment can be maintained stably within a relatively narrow water temperature storage temperature range.

[Brief explanation of drawings]

Figures 1 to 8 show an embodiment of the invention, in which Figure 1 is an enlarged sectional view of the rear part of the compartment, Figure 2 is an electric circuit diagram,
FIG. 3 is a functional block diagram of FIG. 2, FIGS. 4 to 7 are flowcharts showing the software of the microcomputer, and FIG. 8 is a schematic side sectional view of the refrigerator. (1B...cold air passage, +151...cooler, (
161... Main blower, (31... Auxiliary blower, ■
... Compartment, (TC) ... Temperature control device. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Shizuo Sano Figure 1

Claims (1)

[Claims] 1. In a refrigerator in which cold air cooled by a cooler is circulated into the refrigerator by a main blower, a compartment is formed in the refrigerator, and a cold air passage for cooling the compartment; The cold air passage has an auxiliary blower for forcibly circulating the cold air, and by operating the auxiliary blower with a predetermined temperature control device, the temperature inside the compartment is maintained in the freezing temperature storage temperature range. Refrigerator configured.