JPS62169984A - 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 [Industrial Field of Application] The present invention relates to a thawing chamber temperature control device for a refrigerator.

[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, the operating rate of the compressor was configured to decrease linearly as the outside temperature of the refrigerator decreased.

[Problems to be Solved by the Invention] As mentioned above, the defrosting chamber of conventional refrigerators uses a dedicated fan to blow air at about 3°C onto the food to be defrosted.

This method has the problem that the freezing time becomes longer and the odor of the food to be thawed is diffused into the refrigerator.

The present invention has been made in view of the above-mentioned problems.

By providing a heating means 8 that transfers heat from the high-temperature part of the VA machine to the thawing chamber, the thawing time is shortened by high-temperature thawing. Outside temperature so low that it cannot be used (
For example, even if the temperature drops below 15℃, the compressor operation rate is maintained at a predetermined value, the amount of heat transferred to the thawing chamber is ensured, and the refrigerator compartment and cooler are prevented from becoming too cold. It is.

[Means for Solving the Problems] The defrosting chamber temperature control device of the refrigerator according to the present invention compares the detected temperature in the freezing chamber with a set value, and controls the operation of the compressor based on the comparison output. A refrigerator that controls the temperature inside the refrigerator is provided with a thawing chamber for high-temperature thawing, a first timer for setting a thawing time, and a second timer for setting an operation stop time, and a thawing chamber for detecting the outside temperature of the refrigerator. an outside temperature detection means, a determination means for determining in which of a plurality of outdoor temperature ranges the outside air temperature detected by the outside temperature detection means rots, and an AND output of the first timer and the determination means. an operation control means for changing the operation of the compressor from the freezer control to an operation rate control controlled at a preset operation rate based on the above; Either one of the cooler temperature detection means for detecting the temperature of the refrigerator, the output of the refrigerated room temperature detection means, and the output of the cooler temperature detection means has become lower than a corresponding limit setting value. sometimes,
operation stop means for stopping the operation of the compressor for a time set by the second timer; and 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. a heating means, a temperature setting means for setting a control temperature within the thawing chamber, an indoor temperature detecting means for detecting the temperature within the thawing chamber, and an output of the temperature setting means and the indoor temperature detecting means; Based on this, the apparatus is characterized by comprising a temperature control means for opening and closing the electromagnetic valve to control the temperature in the defrosting chamber to a set value.

[Operation] The opening and closing of the solenoid valve is controlled based on the outputs of the temperature setting means and the room temperature detection means, whereby a predetermined amount of heat is transferred from the high temperature section of the compressor, and the thawing chamber is controlled to the set value for high temperature thawing. Ru. At this time of thawing, the operation of the compressor is controlled from the freezer control to the operation rate of the corresponding stage among the plurality of preset operation rates based on the AND output of the first timer and the determination means. Therefore, even if the outside air temperature becomes low (for example, 15° C. or lower), the compressor continues to operate at the operating rate of the corresponding stage. For this reason.

Even when the outside air temperature becomes low, the high temperature section of the compressor serves as a heat source to heat the defrosting chamber. Furthermore, if either the temperature inside the refrigerator compartment or the temperature of the cooler falls below the limit set value due to the compressor continuing to operate under operation rate control under low outside air temperature, the operation stop means will be activated. The compressor stops operating for the time set by the second timer. This prevents the refrigerator compartment and cooler from being overcooled.

[Embodiment] FIGS. 1(a) and 2(b) and 2 show an embodiment of the present invention. In FIG. 1, (1) is a refrigerator main body. The refrigerator main body (1) is divided into a freezer compartment (2) by a partition wall.
), 1st. The second refrigerator compartment (3) (/I) is divided into a thawing compartment (5) and a vegetable compartment (6) which are controlled at a wide range of temperatures from low to high temperatures. A cooler (7) and a cold air fan (8) are installed at the back of the freezer compartment (2), and the fan (8) supplies the cold air cooled by the cooler (7) to the freezer compartment. (2), first and second refrigerator compartments (
3) It is configured to be sent to (4) and the vegetable compartment (6) and returned to the cooler (7). That is, the cold air sent into the freezer compartment (2) returns to the cooler (7) via the first ventilation path (9), and then returns to the cooler (7).
The cooled air is sent to the second ventilation path (11) via the bypass path (10), and the cold air is branched from the second ventilation path (11) and sent to the first refrigerator compartment (3). returns to the cooler (7) via the third ventilation path (12) and returns to the cooler (7) through the third ventilation path (12).
The cold air branched from the ventilation passage (11) and sent to the second refrigerator compartment (4) is sent to the refrigerator compartment (4) via the fifth ventilation passage (14).
3) and returns to the cooler (7) via the third ventilation path (12). The cold air branched from the second ventilation path (11) and sent to the vegetable compartment (6) flows through the fourth ventilation path (11).
3) to the second refrigerator compartment (4), then the fifth ventilation passage (14) to the first refrigerator compartment (3), and the third ventilation passage (12). said cooler (7)
Return to

Further, the fan (8) transfers the cold air cooled by the cooler (7) to the bypass path (10) and the second ventilation path (
11) It is configured to send cold air to the thawing chamber (5) via a cold air outlet (15). An electromagnetic damper (16) for opening and closing the cold air outlet (L5) is provided at the cold air outlet (15), and the electromagnetic damper (16) has a solenoid (16a) controlled by an electric signal and an on-off valve. It consists of a damper flap (16b).

(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 sink (19) disposed in the thawing chamber (5) is coupled to the other side of the heat pipe (18), and a heat sink (19) located in the middle of the heat pipe (19) is opened and closed by electrical signals. A solenoid valve (20) is inserted. The heat pipe (18) transfers the amount of heat absorbed in the high temperature section (17a) of the compressor (17) by volatile substances such as fluorocarbon gas sealed inside to the heat sink (19).
The amount of heat transferred 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 sink (19), and this first container (21) is placed on the heat sink (19).
1) is connected to #! in the second refrigerator compartment (4) by the connecting part (22). It is formed integrally with the placed second container (23). 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 (5).
), the partition wall (24) 4 = partitioning the formed engagement groove (
25).

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

Said control! (31), as shown in FIG. 2, consists of a display operation section (33) and a control section (34) which are coupled to each other.

The display operation section (33) includes first, second, and third setting switches (35) for setting a high temperature range (for example, around 30°C), which also serves to set a timer time corresponding to the weight of the object to be thawed.
(36) (37), fourth and fifth setting switches (38) (39) for setting a first low temperature range (for example, around -2°C) and a second low temperature range (for example, around +3°C); Medium temperature range (e.g. 10"C) suitable for storing southern vegetables etc.
The sixth setting switch (40) for setting the temperature (before and after) and the temperature inside the freezer compartment (2) can be set to low (for example -15°C) or medium (
For example, a seventh setting switch (41) is provided for switching and setting the temperature to a high temperature (for example, -18°C) and a high temperature (for example, -21°C).

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), cooler section 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), the freezer compartment (2), the first. 2nd cold room (
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 setting signal from (36) and (37) and the detection signal from the thawing room temperature sensor (26), set the setting value of the first timer (42) for setting the thawing time.5. t3. t
1, respectively, and control the temperature in the thawing chamber (5) to a high temperature setting value by controlling the opening and closing of the electromagnetic valve (20) during the set time; Second
4th and 5th setting switch (38) for setting low temperature range (3
9) and the detection signal from the thawing room temperature sensor (26), the electromagnetic damper (16) is controlled to open and close to control the temperature in the thawing chamber (5) to a low temperature set value. Low temperature range control, setting signal from the sixth setting switch (40) for medium temperature range setting, and the thawing room temperature sensor (26)
medium temperature range control that controls the temperature in the thawing chamber (5) to a medium temperature set value by controlling the opening and closing of the electromagnetic damper (16) and the electromagnetic valve (20) based on the detection signal from the , the first to sixth setting switches (35) to (40)
When any one of the buttons is pressed, the pressed switch is turned on to display this.

Furthermore, the control section (34) controls the outside temperature sensor (32).
) if the outside air temperature T detected at T < T I (for example, T
, 215°C), T1≦T≦T2 (for example, T2=30
℃), T>T2, and the compressor (17) is provided with a determination means for determining which outside temperature zone the temperature range is in (T>T2), and based on the determination means, the output of the first timer (42), and the AND output. The operation rate is A, B, C from freezer control.
It is equipped with an operation control means that changes to operation rate control that is controlled in stages such that (A<B<C). Here, the operating rates A and B
, C are the operating time and stop time of the compressor, respectively, t,
al, t, bl, jcl and a2, tb2, and c2
Then, it becomes .

Furthermore, the control unit (34) controls the refrigerated room temperature sensor (
27) is below the limit set value TSO (for example, -3°C) and the cooler part sensor (
29) determines whether or not the detected temperature Te is lower than the limit set value Te0 (for example, -40°C), and when either one of them is satisfied, sets the second timer (43); The set time set by this second timer (43)
During this period, the compressor (17) and the fan (8) are stopped in operation.

Next, the operation of the embodiment will be explained using the characteristic diagrams shown in FIGS. 3 and 4 and the flowchart shown in FIG. 5.

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 pressed, the setting signal is sent to the control section (34). The control unit (34) lights up the suppressed switch to display it, and also controls the opening and closing of the electromagnetic damper (16) based on the setting 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 1M thawing chamber 5) is set to the first low temperature (for example, around -2°C) when the fourth setting switch (38) is on, and the second low temperature (for example, around -2°C) when the 5tL constant switches (3) are on.
For example, it can be controlled to a temperature of around 3°C and used for refrigeration.

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, and the temperature inside the thawing chamber (5) is controlled to a medium temperature range (for example, around 1O'C), which can be used for storing southern vegetables. In other words, the thawing chamber (
5) is lower than the lower limit value (8°C) of the control width of the set value Tm (for example, 10°C), cooling is stopped by closing the electromagnetic damper (16), and the solenoid valve (20) is opened. The amount of heat is transferred from the high temperature part (17a) of the compressor (17) to the heat sink (19) via the heat I-pipe (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 (16) is opened and the electromagnetic valve (20) is closed, and cooling is performed by the inflow of cold air. Furthermore, when Tk reaches the lower limit of the control width of Tm (e.g. 8°C), the electromagnetic damper (16) closes, the electromagnetic valve (20) opens, and the high temperature section (17a) of the compressor (17)
The amount of heat is transferred from the heat pipe (18) to the heat sink (19), where it is heated. Therefore, the electromagnetic damper (
16) and the opening/closing of the solenoid valve (20), the temperature Tk in the thawing chamber (5) is controlled within a control range around the set value Tm.

Thirdly, high temperature range control specific to the present invention will be explained.

When the first setting switch (35) of the display operation section (33) is pressed, the setting signal is sent to the control section (34).

The control unit (34) controls the suppressed first setting switch (35).
) lights up, "Is it thawed?" is rYEsJ, and the item to be thawed is rsoog? ” becomes rYESJ, the set value of the first timer (42) becomes t, 5 corresponding to 500g, and the first timer (42) operates. This first timer (4
2), the compressor (
17) Dotted line U in Figure 3 where the operating rate is controlled linearly
Release the freezer control as shown by α, and press the compressor (17).
As shown by the solid line Us in FIG. 3, the operating rate is controlled by any one of A, B, and C in which the operating rate changes stepwise. That is, the outside air temperature T measured by the outside air temperature sensor (32) is T<'T1. T +≦T≦T2, T>T2
The corresponding operation rate A, B, or C is set based on the AND output of the determination signal as to whether it belongs to the temperature zone of the jt deviation and the output signal of the first timer (42). The setting of this operating rate is changed when the outside temperature T changes and the temperature zone to which it belongs changes. At this time.

Even if the outside air temperature T becomes less than TI (for example, 15°C), the operating rate A is ensured, and the high temperature section (17a) of the compressor (17)
) acts as a heat source.

While the compressor (17) is under operating rate control as described above, the first timer (42) is set for a period of 5.
The control unit (34) outputs a setting signal and a defrosting room temperature sensor (26).
Based on the detection signal from Controlled heating. As a result, the temperature inside the thawing chamber (5) changes stepwise ((((changes) to a high temperature range for thawing (for example, around 30°C) as shown by the solid line Ms in Figure 3 in response to changes in the outside air temperature T. It can be used for high-temperature thawing.The one-dot line MQ indicates the temperature change in the thawing chamber (5) during freezer control.In addition, the actual aSs and Fs indicate the temperature change inside the thawing chamber (5) during freezer control. 2), dotted lines SQ and FQ indicate temperature changes in the first refrigerating compartment (3) during freezer control.
), which shows the temperature change inside the freezer compartment (2).

Furthermore, during the high-temperature thawing operation due to the operation rate control as described above, the temperature Ts in the first refrigerator compartment (3) decreases during ego, as shown in FIG. 4, because the outside air temperature T continues to be lower than TI. When the temperature Te of the cooler (7) becomes below the limit set value Ts□ (for example, -3°C) or when the temperature Te of the cooler (7) becomes below the limit set value Te□ (for example, -40°C), the controller (34) The second timer (43
) is set, and during this set time t, s (for example, 10 minutes), i.e., . 1 + 2 hours after
Until 9 o'clock or 7 o'clock after 3 o'clock S hours have passed. The compressor (17) and fan (8) stop operating until the time. For this reason, freezing in the first refrigerator compartment (3) and freezing in the freezer compartment (2)
) is prevented from being overcooled, an insufficient amount of oil circulating in the refrigerant circuit is prevented, and seizure of the compressor (17) is prevented.

When the first setting switch (35) is suppressed, the lighting of the first setting switch (35) and the thawing equipment go out, and the thawing chamber (
The setting value of 5) becomes the first low temperature setting value. Therefore, the thawing chamber (5) is controlled by the first low temperature range control.

The second display operation section (33). Third setting switch (36)
(37) is pressed, the pressed switch lights up and the first timer (42
) now corresponds to 300g and 100g, and 3. jl
becomes. Then, the compressor (17) changes from freezer control to operation rate control as described above, and in this operation rate control state, it continues for a set period of time. During this period, the solenoid valve (20) is controlled to open and close, and the temperature in the thawing chamber (5) is controlled to a high temperature range for high-temperature thawing, and the temperature in the first refrigerator compartment (3) and the cooler (7) are controlled. This prevents the oil from freezing in the compressor (17
) is prevented from burning.

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, a cold air outflow passage communicating with the first and second refrigerator compartments (3), (4), etc. may be provided to promote the flow of cold air.

In the above embodiment, the thawing chamber was configured to perform not only high temperature range control, but also low temperature range control that can be used for normal refrigeration, and medium temperature range control that can be used for storing southern vegetables.
The present invention is not limited to this, but any method may be used as long as it controls a high temperature range that can be used for at least high-temperature thawing.

[Effects of the Invention] As described above, the present invention includes a thawing chamber for high-temperature thawing, a first timer for setting thawing time, and a second timer for setting operation stop time.
A timer is provided, and the operation of the compressor is changed from freezer control to operation rate control in which the operation rate is controlled in stages by AND output of the discrimination signal for determining the temperature zone to which the outside air temperature belongs and the output signal of the first timer. At the same time, the amount of heat transferred from the high temperature section of the compressor to the defrosting chamber is controlled by opening and closing a solenoid valve.

In this way, the thawing chamber can be used for high-temperature thawing by utilizing the amount of heat in the high-temperature section of the compressor without using a conventional dedicated fan, making it possible to shorten the thawing time and improve the thawing process. A fan for.

OL-I uses compressor heat without using a heater, so no extra power is consumed for defrosting operation.
Also, even if the outside air temperature becomes low (for example, below I S 'C), compression 1 maintains the predetermined M conversion rate, and the high temperature part plays the role of heat source for the thawing chamber. Reliable high-temperature thawing action is possible.

Moreover, the temperature inside the factory room is t/? When the temperature of the cooler falls below the set limit value set by the second timer, the aζ of the compressor is stopped for a set time set by the second timer. This structure prevents freezing of the refrigerator compartment and overcooling of the freezer compartment even when the outside temperature is low, and also prevents insufficient amount of refrigerant circulating in the refrigerant circuit, reducing the compressor's capacity. Burn-in is prevented.

[Brief explanation of drawings]

FIGS. 1(a) and 2(b) and 2 show an embodiment of the defrosting chamber temperature control device for a refrigerator according to the present invention. FIG. 1(a) is a partially cutaway front view of the refrigerator; (b) is a sectional view taken along the line A-A in (a), Fig. 2 is a control circuit diagram, Fig. 3 is a characteristic diagram showing the relationship between operating rate and indoor temperature with respect to outside temperature, and Fig. 4
The figure is a characteristic diagram showing operating states of the compressor and fan with respect to temperature changes in the refrigerator compartment and temperature changes of the cooler during high-temperature thawing operation, and FIG. 5 is a flow chart explaining the present invention in detail. (1)...Refrigerator body, (5)...Defrosting chamber, (7)
... Cooler, (8) ... Fan, (16) ... Electromagnetic damper, (17) ... Compressor. (17a)...High temperature part, (18)...Heat pipe,
(19)... Heat sink, (20)... Solenoid valve, (26
)...Defrosting room temperature sensor, (27)...Refrigerating room temperature sensor, (29)...Cooler unit sensor, (32)...Outside temperature sensor, (34)...Control unit, (35)... ), (3
6) (37)...Temperature setting switch, (42)...
First timer, (43)...second timer. as l mouth 3rd figure TI TZ outside 5th 4S 4 figure

Claims (1)

[Claims] (1) In a refrigerator that controls the temperature inside the refrigerator using freezer control, which compares the detected temperature in the freezer compartment with a set value and controls the operation of the compressor based on the comparison output, there is a thawing compartment for high-temperature thawing and thawing time. A first timer for setting and a second timer for setting an operation stop time are provided, an outside temperature detection means for detecting the outside temperature of the refrigerator, and a plurality of outside air temperatures detected by the outside temperature detection means. a determining means for determining which of the outdoor temperature zones it belongs to, and an operation of the compressor at a preset operating rate from the freezer control based on the AND output of the first timer and the determining means; an operation control means for changing the controlled operation rate control; a refrigerating room temperature detecting means for detecting the temperature inside the refrigerating room; a cooler temperature detecting means for detecting the temperature of the cooler; and the refrigerating room temperature detecting means. When either the output of the cooler temperature detecting means or the output of the cooler temperature detection means becomes lower than a corresponding limit setting value, the operation of the compressor is stopped for a set time of the second timer. an operation stop means, a heating means for controlling the amount of heat transferred from the high temperature section of the compressor to the defrosting chamber via a heat pipe by opening and closing a solenoid valve, and a temperature setting for setting a control temperature in the defrosting chamber. a room temperature detection means for detecting the temperature inside the defrosting chamber; and a temperature setting means for opening and closing the solenoid valve to set the temperature inside the defrosting chamber to a set value based on the outputs of the temperature setting means and the room temperature detecting means. A thawing chamber temperature control device for a refrigerator, comprising a temperature control means for controlling the temperature.