JP2776947B2 - refrigerator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a refrigerator, and particularly to a refrigerator having a storage room which has both a quick thawing function and a quick cooling function and which normally maintains an ice greenhouse temperature zone. It concerns control.

[Conventional technology]

A conventional refrigerator with a rapid thawing chamber is disclosed, for example, in JP-B 64-1075.
As described in JP-A No. 4 (KOKAI), high-temperature air in the refrigerator compartment is introduced into the storage compartment to perform thawing, and when rapid cooling is performed, cool air is introduced into the storage compartment through a cool air inlet connected to the storage compartment. Had a structure.

[Problems to be solved by the invention]

According to the above-mentioned conventional technology, when thawing, the high-temperature air in the refrigerator compartment is introduced into the storage compartment for thawing. Touching the outer periphery of the room has the effect of giving an uneasy feeling that the refrigerator room is warm.

The present invention has been made in order to solve the problems in the above-described conventional technology, and forcibly operates a compressor only during a predetermined time during and after rapid thawing, and suppresses a rise in temperature around the storage chamber to a small extent. It is an object of the present invention to provide a refrigerator having a reduced size.

[Means for solving the problem]

In order to achieve each of the above objects, the basic configuration of a refrigerator according to the present invention includes a freezer compartment and a refrigerator compartment, and a storage compartment having both quick thawing and rapid cooling functions in a part of the refrigerator compartment. In the refrigerator, a control circuit for compulsorily operating the compressor for a preset time during the rapid thawing and rapid cooling of the storage room and during the rapid cooling after the rapid cooling is constituted.

A cross-flow fan located at the back of the storage chamber; a first cool air inlet positioned below the flow-through fan and opening at the lower part of the storage chamber; A second cool air inlet, a cool air introduction passage connecting the freezing room and the storage room, a cool air damper provided in the cool air introduction passage, and a defrosting heater provided on a ceiling of the storage room. It is a thing.

The configuration of the control method is a refrigerator comprising a freezer compartment, a refrigerator compartment, and a storage compartment having both a rapid thawing function and a rapid cooling function in a part of the refrigerator compartment, and a once-through fan located on the back of the storage compartment. A first cool air inlet located below the once-through fan and opening at the lower part of the storage chamber, a second cool air inlet located above the once-through fan and opening at the upper part, A cold air introduction path connecting the storage chamber, and a control circuit for forcibly operating the compressor when the cold air damper provided in the cold air introduction path is closed, and for stopping the operation of the compressor after a predetermined time has elapsed after rapid thawing. It is provided.

[Action]

 The function of each of the above technical means is as follows.

A cold air introduction path for introducing cool air from the freezing room is opened at the lower rear part of the storage room, a cold air damper is provided in the cold air introduction path, the cold air damper is closed, and a thawing heater installed on the storage room ceiling, When operating a once-through fan installed on the back of the storage room and performing quick thawing, a control circuit is configured to forcibly operate the compressor during a predetermined time during the quick thawing of the storage room and after the thawing is completed. Therefore, the temperature of the outer periphery of the storage chamber becomes abnormally high during the thawing, and the user does not feel uneasy.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view of a refrigerator according to one embodiment of the present invention,
FIG. 2 is a front view showing the inside of the refrigerator of FIG. 1, FIG. 3 is a flowchart showing a control procedure of quick cooling, and FIG. 4 is a flowchart showing a control procedure of quick thawing.

1 and 2, reference numeral 1 denotes a freezing room, and 12 denotes a refrigerator room. Reference numeral 2 denotes a cool air introduction passage for introducing cool air from a freezing room, and 3 denotes a storage room installed at an upper portion in the refrigerator room 12.
Has both functions of rapid thawing and rapid cooling as described below. Reference numeral 4 denotes a cool air damper provided in the cool air introduction path 2.

6 is a ceiling duct formed in the ceiling of the storage room, 6a
Denotes a front inlet, and 7 denotes a defrosting heater provided in a ceiling duct.

8 is a once-through fan located on the back of the storage room 3, 8a is
The inlet of the once-through fan is shown.

3a is located below the once-through fan 8 and
A first cold air inlet 3b opening at the lower part of the storage chamber 3 is located at the upper part of the once-through fan and opening at the upper part of the storage chamber 3.
The cold air inlet.

9 is a temperature sensor provided at the suction port 8a of the once-through fan.

A freezing room cooling fan 10 is operated in synchronization with the compressor 11, and circulates cool air through the freezing room cooling fan 10 to the freezing room 1 and the refrigerating room 12.

Reference numeral 13 denotes a refrigerator temperature control thermostat that detects the temperature of the refrigerator and opens and closes the cold air damper.

Cold air damper 4 is a temperature control thermostat for refrigerator compartment
The cold air from the freezing room 1 is connected to the cold room 12 and the cold air introducing passage 2 of the storage room 3 via the cold air damper 4.

The cold air damper 4 detects the temperature with an ice temperature sensor 5 for maintaining the storage room 3 at the temperature of the normal ice temperature room, and opens and closes it according to a command from the control circuit 16.

When the cool air damper 4 is opened, the cool air from the freezing room 1 is guided by the freezing room cooling fan 10 via the cool air introducing passage 2 to the first cool air inlet 3a of the storage room 3 to cool the storage room 3. When the temperature sensor 5 cools down to a predetermined temperature, the cold air damper 4 is closed by a command from the control circuit 16.

Further, since the cool air introduction passage 2 is open to the first cool air inlet 3a of the storage room 3, the cool air can easily flow into the storage room 3 by the wind pressure of the freezing room cooling fan 10.

Next, the control operations of such quick cooling and quick thawing of the refrigerator will be described with reference to the flowcharts of FIGS. 3 and 4, respectively. In the following description, numerical values in parentheses are step numbers in the flowchart.

In the flowchart, the cold air damper 4 is simply referred to as a damper, the once-through fan 8 is simply referred to as a fan, the thawing heater 7 is simply referred to as a heater, and the temperature sensor is referred to simply as a sensor.

First, rapid cooling will be described. During the rapid cooling operation, the compressor 11 is forcibly and continuously operated (step 1) to keep the temperature of the introduced cool air low. Since the cool air introduction passage 2 communicates with the second cool air inlet 3b at the upper rear portion of the storage room 3, that is, the suction port 8a of the flow-through fan, the cool air damper 4 is opened (step 2) and the flow-through fan 8 is operated (step 2). Step 3)
Then, cold air can be forcibly introduced into the storage room 3.

As the rapid cooling proceeds, the temperature of the temperature sensor 9 decreases, and when the temperature reaches a preset temperature (step 4), the cold air damper 4 is closed (step 5).
Prevents food 15 from freezing. When the temperature of the temperature sensor 9 rises again and reaches a preset temperature, the cool air damper is opened (step 6) to introduce cool air.

After the cold air damper 4 is closed (Step 7), the flow through fan 8 is stopped (Step 8) and the rapid cooling operation is completed (Step 9), the operation value of the ice temperature sensor 5 is refrigerated for a preset time. The temperature of the storage room 3 is shifted to the temperature of the room 12 and the temperature of the storage room 3 which is normally adjusted to the temperature range of the ice room is maintained at the temperature range of the refrigerator room (step 10). Around temperature can be maintained.

 Next, rapid thawing will be described.

The cool air damper 4 is closed by a command from the control circuit 16, and the compressor is forcibly operated continuously to lower the temperature in the refrigerator compartment. In other words, the temperature of the outer periphery of the storage room is prevented from rising abnormally. (Step 11) The heater 7 installed inside the ceiling duct 6 of the storage room 3 and the once-through fan 8 installed at the back of the storage room are operated. (Step 12) The air heated by the thawing heater 7 is sucked into the once-through fan 8 and discharged to the storage room 3 to supply warm air to the food 15, so that the food 15 can be thawed. Food 15
The air that has been deprived of heat by heating is sucked from the front suction port 6a of the ceiling duct 6 of the storage room 3 and circulated.

As the rapid thawing progresses, the energization of the thawing heater 7 is stopped at a temperature set in advance by the temperature sensor 9 installed at the suction port 8a of the once-through fan. (Step 13) At this time, in the present invention, since the compressor is forcibly operated, the temperature around the storage room 3 becomes low, and the temperature sensor 9 does not reach the preset temperature. Then, the thawing proceeds, but the energizing time of the thawing heater 7 becomes longer, and only the temperature of the food 15 rises. When the ambient temperature of the storage room 3 fluctuates in this manner, the energization of the thawing heater 7 is stopped according to the thawing time (step 14) set by the control circuit 16. (Step 15) After the energization of the thawing heater 7 is stopped, the once-through fan 8 is operated for a preset time, and when the temperature of the storage room 3 is sufficiently cooled, the cool air damper 4 is opened (Step 16). After forcedly introduced into the storage room 3 to reduce the temperature difference between the surface and the center of the food 15 and reduce uneven thawing, the flow-through fan 8 is stopped (step 17), and the thawing is completed. (Step 18) In synchronization with the defrosting of the refrigerator 14 of the refrigerator, only the once-through fan 8 or the once-through fan 8 and the thawing heater 7 are energized for a preset time to raise the temperature around the once-through fan 8. Then, the frost adhering to the once-through fan 8 is removed.

Further, when a predetermined time elapses after the rapid thawing is completed in step 18, the compressor is stopped in step 19, and the forced continuous operation of the compressor is stopped.

According to this embodiment, when the storage room is used as a quick thawing room, the compressor is forcibly operated together with the closing operation of the cold air damper for supplying cool air to the storage room, the thawing is completed, and the preset time elapses. Since the forced operation of the compressor is continued until the start of the operation, the outer peripheral temperature of the storage room becomes high and the user does not feel uneasy.

〔The invention's effect〕

As described above, according to the present invention, although the heating heater is used in the storage room at the time of quick thawing, the temperature of the outer peripheral wall of the storage room does not rise abnormally, so that the user feels uneasy. Is not given.

In the case of rapid cooling, when the temperature sensor reaches a preset temperature, the cold air damper closes, so that freezing of the food can be prevented.

After the rapid cooling operation is completed, the temperature of the storage room is maintained in the temperature range of the refrigerator room, so that the freezing of the food is prevented, and the temperature of eating and drinking is maintained.

In addition, since the frost adhering to the once-through fan is removed in synchronization with the defrosting of the refrigerator cooler, there is an effect of preventing the once-through fan from freezing.

[Brief description of the drawings]

1 is a sectional view of a refrigerator according to one embodiment of the present invention, FIG. 2 is a front view showing the inside of the refrigerator of FIG. 1, FIG. 3 is a flowchart showing a control procedure of rapid cooling, FIG. 4 is a flowchart showing a control procedure for quick thawing. 1 ... freezer room, 2 ... cold air introduction path, 3 ... storage room, 3a ... first cold air inlet, 3b ... second cold air inlet, 4 ... cold air damper, 5 ... ice greenhouse Temperature sensor, 6 …… Ceiling duct, 6
a …… Front inlet, 7… Thaw heating heater, 8 …… Through-flow fan, 8a …… Through-flow fan inlet, 9 …… Temperature sensor,
10… Freezer cooling fan, 11… Compressor, 12… Refrigerator, 1
3… Cooling room thermostat, 14 …… Cooler, 1
5… Food, 16 …… Control circuit.

Continuation of the front page (72) Inventor Masuji Sudo 800 Tomita, Ohira-machi, Ohira-machi, Shimotsuga-gun, Tochigi Prefecture In-house Tochigi Plant, Hitachi, Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) F25D 11/02 F25D 17/08

Claims (3)

(57) [Claims] 1. A refrigerator comprising a freezer compartment and a refrigerating compartment, wherein a part of the refrigerating compartment is provided with a storage compartment having both rapid thawing and rapid cooling functions. A refrigerator comprising a control circuit for forcibly operating a compressor for a preset time after thawing. 2. A refrigerator comprising a freezer compartment, a refrigerator compartment, and a storage compartment having a function of both rapid thawing and rapid cooling in a part of the refrigerator compartment, comprising: a once-through fan located at the back of the storage compartment; A first cool air inlet located at a lower portion of the once-through fan and opening at a lower portion of the storage chamber; a second cool air inlet located at an upper portion of the once-through fan and opening at an upper portion; 2. A cold air introduction path for connecting a storage room, a cool air damper provided in the cold air introduction path, and a thawing heater provided on a ceiling portion of the storage room, are provided. The refrigerator as described. 3. A refrigerator comprising a freezer compartment, a refrigerator compartment, and a storage compartment having a function of both rapid thawing and rapid cooling in a part of the refrigerator compartment, comprising: a once-through fan located at the back of the storage compartment; A first cool air inlet located at a lower portion of the once-through fan and opening at a lower portion of the storage chamber; a second cool air inlet located at an upper portion of the once-through fan and opening at an upper portion; A cold air introduction path connecting the storage room and a control circuit for forcibly operating the compressor when the cold air damper provided in the cold air introduction path is closed, and stopping the compressor operation after a predetermined time elapses after rapid thawing. 3. The refrigerator according to claim 1, wherein the refrigerator is used.