JPS62169987A - Thawing-room temperature controller for 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 [Field of Industrial Application] The present invention relates to a defrosting chamber temperature control device for a refrigerator. More specifically, a thawing chamber that is controlled to a medium temperature range (for example, around 10°C) is provided in the refrigerator, and this thawing chamber is controlled to a medium temperature range, and during this control, freezing inside the refrigerator is prevented. The present invention relates to a temperature control device.

[Prior art] Conventionally, the thawing chamber of a refrigerator uses a dedicated fan to guide cold air cooled by a cooler into the thawing chamber, and then blows air at about 3°C onto the items to be thawed and returns it to the cooler. was. Furthermore, there was no thawing chamber that could control the temperature to a medium temperature range (for example, around 10°C).

[Problems to be Solved by the Invention] As mentioned above, the thawing chamber of conventional refrigerators uses a dedicated fan to circulate air at about 3°C over the items to be thawed, which reduces the thawing time. There was a problem that as the time became longer, the odor of the items to be thawed was diffused into the refrigerator.

The present invention has been made in view of the above-mentioned problems, and includes a cooling means for sending cold air from the cooler to the thawing chamber, and a heating means for transmitting heat from the high temperature section of the compressor to the thawing chamber. The temperature is controlled to a predetermined medium temperature range, and the interior of the refrigerator is prevented from freezing during this control.

[Means for Solving the Problems] The defrosting chamber temperature control device of the refrigerator according to the present invention compares a detected value in the freezing chamber with a set value, and uses the comparison output to control the operation of the compressor. A refrigerator configured to control the temperature inside the refrigerator includes a refrigerating chamber and a thawing chamber controlled in a medium temperature range, and a cooling means for controlling the amount of cold air sent from the cooler to the thawing chamber by opening and closing an electromagnetic damper. , heating means for controlling the amount of heat transferred from the high temperature section of the compressor to the thawing chamber via the heat pipe by opening and closing a solenoid valve; thawing room temperature setting means for setting the control temperature in the thawing chamber to a medium temperature range; The opening and closing of the electromagnetic damper and the electromagnetic valve are controlled based on the outputs of a thawing room temperature detection means for detecting the temperature inside the thawing chamber, the thawing room temperature setting means, and the thawing room temperature detection means.

temperature control means for controlling the thawing chamber to a medium temperature set value; a stop timer for setting the operation stop time of the compressor; a refrigerating room temperature detecting means for detecting the temperature inside the refrigerating chamber; and the refrigerating room temperature detecting means. a determining means for determining whether a value detected by the means is less than a set value for anti-freezing; and an operation for stopping the operation of the compressor for a set time of the stop timer based on the output of the determining means. a stop means, a cut-off timer for setting a time to cut off the output of the refrigerated room temperature detection means, and a cut-off timer for setting the time to cut off the output of the refrigerated room temperature detection means; and a cut-off timer for detecting the cold room temperature for a set time of the cut-off timer based on a time-up output of the stop timer. The device is characterized by comprising an output cutoff means for cutting off the output of the means.

[Operation] The thawing chamber is controlled to a medium temperature range by opening and closing an electromagnetic damper and a solenoid valve based on the temperature control means, and can be used for storing southern vegetables and for medium temperature thawing.

During the above-mentioned medium temperature range control, if the temperature inside the refrigerator compartment in the JIII falls below the anti-freezing set value and the refrigerator compartment is about to freeze, the 5M rotation stop means starts the stop timer based on the output of the determination means. Compressor operation stops for the set time. Therefore, freezing inside the refrigerator is prevented. Further, since the output cutoff means returns to freezer control for at least the set time of the cutoff timer based on the time-up output of the stop timer, the temperature of the freezing compartment is prevented from deviating significantly from the set value of the freezing compartment.

[Embodiment] Figures 1 (a) and 2 (b) and 2 show an embodiment of the present invention. In Figure 1, (1) is the refrigerator body. The cold R* main body (1) is divided into a freezer compartment (2) by a partition wall.
), first and second refrigerator compartments (3) (4), a thawing compartment (5) whose temperature is controlled over a wide range from low to high temperatures, and a vegetable compartment (6). A cooler (7) and a fan (8) for cooling air *i are provided at the back of the freezer compartment (2), and this fan (8) causes the cold air cooled by the cooler (7) to be transferred to the freezer. Room (2), 1st and 2nd cold storage room (3)
(4) and the vegetable compartment (6), and is sent to the cooler (7).
is configured to return to That is, the freezer compartment (
2) The cold air sent into the interior returns to the cooler (7) via the first ventilation path (9), and the cold air cooled by the cooler (7) is further returned to the cooler (7) through the bypass path (lO). 2nd ventilation duct (
11), branched from this second ventilation path (11), and sent to the first refrigerator compartment (3), the cold air is sent to the third ventilation path (1
The cold air returns to the cooler (7) via the air cooler (7) through the air cooler (7), branches off from the second ventilation path (11), and is sent to the second cold room (4). into the refrigerator compartment (3) through the fifth ventilation path (14).
) and returns to the cooler (7) via the third ventilation path (12).6 The cold air branched from the second ventilation path (11) and sent to the vegetable compartment (6) is 4th ventilation duct (13
) to the second refrigerating compartment (4), and then to the fifth refrigerating compartment (4).
It is sent to the first refrigerating room (3) through the ventilation path (14) and returns to the cooler (7) through the third ventilation path (12).

Furthermore, the said fan (8) is the said cooling! (7) The cold air cooled by the bypass passage (10) and the second ventilation passage (
11) and the thawing chamber (15) through the cold air outlet (15).
9 said cold air outlet (1) configured to send to said cold air outlet (1);
5) is provided with an electromagnetic damper (1G) that opens and closes this cold air outlet (5), and this electromagnetic damper (16) has a solenoid (16a) controlled by an electric signal and a damper flap (16b) as an on-off valve. ).

(17) is a compressor that constitutes a refrigeration cycle with the cooler (7), and a negative side of a heat pipe (18) is provided in a high temperature part (17a) such as an oil cooler of this compressor (17). ing. A heat dissipation plate (19) disposed in the thawing chamber (5) is coupled to the other side of the heat pipe (18), and a heat dissipation plate (19) disposed in the thawing chamber (5) is coupled to the other side of the heat pipe (18).

A solenoid valve (20) whose opening/closing is controlled by Electricity No. 43 is inserted. The heat pipe (18) uses a volatile substance such as fluorocarbon gas sealed inside the heat pipe (18) to operate the compressor (18).
17) is configured to transfer the amount of heat absorbed in the high temperature part (17a) to the heat sink (19), and this amount of transferred heat is 1
It is controlled by opening and closing the electromagnetic valve (20).

A first container (21) for accommodating items to be thawed or refrigerated is placed on the heat dissipation plate (19). 2nd cold room (
4) is integrally formed with the second container (23) placed within. Said 1st. The connecting part (22) connecting the second containers (21) and (23) is connected to the second refrigerator compartment (4) and the thawing compartment (
The engagement groove (2) formed in the partition wall (24) that partitions the
5) is removably engaged with.

The thawing room (5), the first refrigerating room (3), and the freezing room (2) each include a thawing room temperature sensor (26), a refrigeration room temperature sensor (27), and a freezing room temperature sensor (26) for detecting the respective indoor temperatures. 28) are provided respectively. Furthermore, a coolant temperature sensor (29) for detecting the temperature of the cooler (7) is fixed to the cooler (7), and a defrost end sensor (30) is installed near the cooler (7). is provided.

A control panel (31) is provided in the upper part of the refrigerator body (1), and this control panel (3) is provided with an outside temperature sensor (32) for detecting outside temperature.

As shown in FIG. 2, the control panel (31) consists of a display/operation section (33) and a control section (34) which are connected to each other.

The display control section (33) has a high temperature range (for example, 30
1st, 2nd, and 3rd setting switches (before and after) settings (
35) (36) (37) and the first low temperature region (for example -
4th and 5th setting switches (38) (39) for setting the second low temperature range (for example, around +3℃) The sixth setting switch (40) for setting the medium temperature range (e.g. 10°C after market) and the temperature in the freezer compartment (2) are set to low (e.g. -15°C) and medium (e.g. -18°C) 1 high. (For example -2
7th setting switch (1°C)
41) are provided.

The control unit (34) controls the outside temperature sensor (32) and the frozen room temperature sensor (28) in the same manner as conventional freezer control.
, detection signals from the defrost end sensor (30), refrigerated product temperature sensor (29), and refrigerator room temperature sensor (27), and a setting signal from the seventh setting switch (41) of the display operation section (33). Based on the compressor (17) and fan (
8), and controls the freezer compartment (2), the first and second refrigerator compartments (
3) It is configured to control the temperature in (4) and the vegetable compartment (6) to a predetermined value.

The control section (34) further includes the display operation section (33).
) for setting the high temperature range. Third setting switch (3
5) Based on the settings from (36) and (37) (No. 3 and the detection signal from the thawing room temperature sensor (26)), set the setting value of the timer (42) for setting the thawing time to j 5 , t,
3-1-1 respectively, and controls the opening and closing of the solenoid valve (20) during the set time to open and close the defrosting chamber (5).
) for controlling the temperature in the high temperature range to a high temperature setting value, and a fourth temperature range control for setting the first and second low temperature ranges. Fifth setting switch (38
) (39) and the defrosting room temperature sensor (26).
) based on the detection signal from the electromagnetic damper (16).
low temperature range control that controls the temperature in the thawing chamber (5) to a low set value by controlling opening and closing, a setting signal from the sixth setting switch (40) for setting the medium temperature range, and the thawing room temperature sensor (
Based on the detection signal from the electromagnetic damper (1
6) and the solenoid valve (20) to open and close the thawing chamber (5).
) to a medium temperature setting value, and the first to sixth setting switches (35) to (
40) is suppressed, the pressed switch is turned on to display this.

Furthermore, the control unit (34) includes a stop timer (43) for setting an operation stop time js (for example, 8 minutes) of the compressor (17), and a temperature detected by the refrigerating room temperature sensor (27). T is the set value TQ set to prevent freezing inside the refrigerator.
(for example, -2°C), and based on the output of this determining means, the stop timer (
43) A stop means for stopping the operation of the compressor (17) and the fan (8) for a set time ts, and a time jc (for example, 24 minutes) for cutting off the output of the refrigerating room temperature sensor (27). and an output to cut off the output of the refrigerating room temperature sensor (27) for a set time Lc of the cut-off timer (44) based on the time-up output of the stop timer (43). It is equipped with a blocking means.

Next, the operation of the above embodiment will be explained in the characteristic diagram in FIG. 3 and in the characteristic diagram in FIG.
This will be explained using the flowchart shown in the figure.

First, low temperature range control will be explained.

Fourth and fifth setting switches (38) of the display operation section (33)
When any one of (39) is suppressed, the setting signal is sent to the control unit (34).The control unit (34) lights up the suppressed switch to display it, and also displays the suppressed switch. Controls opening and closing of the electromagnetic damper (16) based on the signal and the detection signal from the defrosting room temperature sensor (26),
The amount of cold air cooled by the cooler (7) and sent by the fan (8) flowing into the thawing chamber (5) is controlled. As a result, the temperature in the thawing chamber (5) is set to the first low temperature (for example, around -2°C) when the fourth setting switch (38) is on, and to the first low temperature (for example, around -2°C) when the fifth setting switch (39) is on. 2. It is controlled to a low temperature (for example, around 3° C.) and can be used for refrigeration. 5. Second, medium temperature range control will be explained.

When the sixth setting switch (40) of the display operation section (33) is pressed, the setting signal is sent to the control section (34).

The control unit (34) controls the pressed sixth setting switch (40).
) and also turns on the electromagnetic damper (16) based on this setting signal and the detection signal from the defrosting room temperature sensor (26).
) and a solenoid valve (20) are controlled to open and close.
The temperature inside is controlled to a medium temperature range (for example, around 10°C) and can be used for storing southern vegetables. In other words, the thawing chamber (
5) The temperature Tk within is the set value Tm (for example, 10°C)
If the temperature is lower than the lower limit of the control width (8°C), the electromagnetic damper (IG) closes to stop cooling, the electromagnetic valve (20) opens, and the heat pipe ( The amount of heat is transferred to the heat sink (19) via the heat sink (18),
It is heated and the temperature Tk rises. Then, when Tk reaches the upper limit of the control width of Tm (for example, 12° C.), the electromagnetic damper (IG) opens, the electromagnetic valve (20) closes, and cooling is achieved by the inflow of cold air. Also, when Tk reaches the lower limit of the control width of Tm (e.g. 8°C), the electromagnetic damper (16) is closed and the electromagnetic valve (
20) The compressor (17) is opened, and the amount of heat is transferred from the high temperature part (17a) of the compressor (17) to the heat sink (19) via the heat pipe (18), thereby heating it. Therefore, 5 electromagnetic dampers (1
6) and the temperature T in the thawing chamber (5) by opening and closing the solenoid valve (20).
k is controlled within a control range centered around the set value Tm.

During the above-mentioned low temperature range control or medium temperature range control, the third
and as shown in the figure. At the time, the temperature T in the first refrigerator compartment (3)
When the temperature reaches the set value TQ for antifreeze (e.g. -2°C), "T≦TQ?" becomes r'/ESJ, and the controller (3
4) is a stop timer (43) based on the output of the determining means.
), and the operation of the compressor (17) and fan (8) is stopped for the set time hys. This set time t=s is calculated from the minimum stop time required for restarting the compressor (17) to the high temperature section (17) of the compressor (17).
a) is set to a predetermined value (for example, 8 minutes) within the range up to the maximum stop time of the compressor (17) that can serve as a heat source for the thawing chamber (5).

At 120 o'clock, S time has elapsed since 10 o'clock t, the control unit (34) sets the cut-off timer (44) based on the time-up output of the stop timer (43>), and also sets the cut-off timer (44) for the set time t, During c, the refrigerated room temperature sensor (2
7) Cut off the output. For this reason, the compressor (17)
Regardless of the output of the refrigerator room temperature sensor (27), the detected value by the freezer room temperature sensor (28) and the freezer room temperature set value (upper limit T
Returns to the freezer control which operates with the comparison output with fU, lower limit value TfQ). During the set time tc for shutoff, the compressor (17) is stopped during the set time ts, and the temperature Tf in the freezer compartment (2) rises, thereby increasing the set upper limit Tfu (for example, -18 , 5° C.) to a necessary predetermined value (for example, 24 minutes).

t, set time for shutoff from 2 o'clock 11. C passed 19
At 0 o'clock, the output cutoff means of the control section (34) is released, and therefore the 6 determination means determines that "T≦TQ?J".

As shown in Figure 3, this "T≦TQ?"
Therefore, the compressor (17) and the fan (8) stop operating from 1=hour until t, 4°, when the set stop time t, s has elapsed, in the same manner as described above. And then. The set time for the cut-off has elapsed since then. Until then, the freezer is controlled as shown in FIG. death,. At times,
Since "T≦TQ?" becomes "NO", the freezer control continues.6 When the temperature T in the first cooling chamber (3) reaches TQ at 1 o'clock, "T≦Tu': 'J Then, the compressor (17) and the fan (8) stop operating until 79:00 after the set time ts for stopping has elapsed from 160:00 in the same way as described above.Then, the same operation is repeated.

Thirdly, high temperature range control will be explained.

When the first setting switch (35) of the display operation section C33) is depressed, the setting signal is sent to the control section (34).

The control unit (34) controls the pressed first setting switch (35).
) and said, ``Is it thawed? 71 is r~' and I'm happy.''
, Is the unzipped object rsoog? ” becomes rYEsJ, the set value of the timer (42) becomes L5 corresponding to 500g, and the timer (42) operates. During the set time 5 of this timer (42), the control unit (34) controls the solenoid valve (
20) to open and close the high temperature section (17a) of the compressor (17).
) to the heat sink (19) via the heat pipe (18). As a result, the temperature inside the thawing chamber (5) is controlled to a high temperature range (for example, around 30'C) and can be used for high temperature thawing. First setting switch (
35) When the set time t5 for decompression has elapsed from the time of suppression,
Based on the time-up output of the timer (42), high temperature range control is canceled and the first setting switch (35)
The light turns off and the set value of the thawing chamber (5) becomes the first low temperature set value. Therefore, the thawing chamber (5) is controlled by the first low temperature range control.

2nd and 3rd setting switch (3G) of display operation section (33)
When (37) is suppressed, the suppressed switch lights up in the same manner as described above, and the set values of the timer (42) become 3, 3, and 3, which correspond to 300g and 100g. Then, this set time L3, hee! During the solenoid valve (
20) is controlled to open and close, and the temperature inside the thawing chamber (5) is controlled to a high temperature range for high-temperature thawing.

In the above embodiment, freezing inside the refrigerator is prevented during low temperature range control and medium temperature range control, but the present invention is not limited to this, and also prevents freezing inside the refrigerator during high temperature range vJfi 11 o'clock. It may be done as long as it prevents freezing inside the refrigerator at least during medium temperature range control.

In the embodiment described above, the thawing chamber (5) is not provided with an outflow path for cold air that communicates with the first refrigerator compartment (3), etc., and the odor of the thawed food in the thawing chamber (5) is diffused to other chambers. However, the first problem is that A cold air outflow passage communicating with the second refrigerator compartment (3), (4), etc. may be provided to promote the flow of cold air.

In the above embodiment, the thawing chamber has not only medium temperature range control that can be used for medium temperature thawing and storage of southern vegetables, but also low temperature range control that can be used for normal refrigeration and high temperature range control for high temperature thawing. However, the present invention is not limited to this, and may be any device that performs at least medium temperature range control.

[Effects of the Invention] As described above, the present invention provides a thawing chamber that is controlled to a medium temperature range, and controls this thawing chamber to a medium temperature set value by opening and closing an electromagnetic damper and a solenoid valve provided in the temperature control means. Therefore, the defrosting time can be made shorter than before, and since the heat of the compressor is used without using a fan or heater for defrosting, no extra power is consumed during the defrosting operation. Moreover, it can be used not only for thawing at medium temperatures but also for storing southern vegetables. Furthermore, when the temperature inside the refrigerator room falls below the anti-freezing set value, the operation stop means stops the operation of the pressure-fa machine for one set time on the stop timer, thereby preventing freezing inside the refrigerator. can do. Moreover, after the set time of the stop timer has elapsed, the freezer control is performed for the set time of the cut-off timer, regardless of the temperature in the refrigerator compartment, so the temperature in the freezer compartment is lower than necessary from the set value in the freezer compartment. It never shifts.

[Brief explanation of drawings]

Figures 1 (a) and (b) and Figure 2 show an embodiment of the temperature control device for the defrosting chamber of a refrigerator according to the present invention. Front view, (b) is a sectional view taken along the line A-A of (a), Fig. 2 is a control circuit diagram, and Fig. 3 is the temperature in the freezer room and refrigerator room temperature over time during low temperature range control and medium temperature range control. Characteristic diagram showing changes in etc., 4th
The figure is a flowchart illustrating the invention in detail. (1)... Refrigerator body, (3) (4)... Refrigerator compartment, (
5)... Thawing chamber. (7)・Cooler, (8)・Fan, (X6)・Magnetic damper, (17)・Compressor, (171)・High temperature part, (18)・Heat pipe, ( 19)...Radiation plate, (2o)...Solenoid valve, (26)...Defrosting room temperature sensor, (27)...Refrigerating room temperature sensor, (2g)...
・Cold junction room temperature sensor, (34)...Control unit, (40)・
・Medium temperature range setting switch, (42)...Timer, (43
)...Stop timer, (44)...Shutoff timer,
TQ...Setting value for anti-freezing.

Claims (1)

[Claims] (1) In a refrigerator in which the temperature inside the freezer is controlled by freezer control, which compares the detected value in the freezer compartment with a set value and controls the operation of the compressor based on the comparison output,
A refrigerator compartment and a thawing compartment controlled in a medium temperature range are provided, and cooling means controls the amount of cold air sent from the cooler to the thawing compartment by opening and closing an electromagnetic damper, and a cooling means controls the amount of cold air sent from the cooler to the thawing compartment by opening and closing an electromagnetic valve. A heating means for controlling the amount of heat transferred to the thawing chamber via a pipe, a thawing room temperature setting means for setting the control temperature in the thawing chamber to a medium temperature range, and a thawing room temperature detecting means for detecting the temperature inside the thawing chamber. , temperature control means for controlling the opening and closing of the electromagnetic damper and the electromagnetic valve based on the outputs of the defrosting room temperature setting means and the defrosting room temperature detecting means, and controlling the defrosting chamber to a medium temperature set value; and stopping the operation of the compressor. A stop timer for setting a time, a refrigerating room temperature detecting means for detecting the temperature inside the refrigerating room, and a determination for determining whether a detected value by the refrigerating room temperature detecting means is below a set value for freezing prevention. means, an operation stop means for stopping the operation of the compressor for a set time of the stop timer based on the output of the discriminating means, and a cutoff for setting a time for cutting off the output of the refrigerating room temperature detection means. and an output cutoff means for cutting off the output of the refrigerating room temperature detection means for a set time of the cutoff timer based on a time-up output of the stop timer. Thawing chamber temperature control device.