CN100374799C - refrigerator - Google Patents

Abstract

A refrigerator has: the refrigerator comprises a refrigerating chamber (5) arranged at the upper part of a refrigerator body, a freezing chamber (9) arranged at the lower part of the refrigerator body, a vegetable chamber (7) arranged between the refrigerating chamber and the freezing chamber, an ice making chamber (12) arranged at one corner of the refrigerating chamber and provided with an automatic ice making device, and an ice making fan (31) arranged at the back of the ice making chamber, wherein cold air generated by a refrigerating cooler is blown to the ice making chamber through a pipeline (30) and the ice making fan (31), and the cold air pipeline comprising the refrigerating fan and a return pipeline from the ice making chamber are arranged at the back part of the vegetable chamber. A weak freezing chamber (6) is disposed in the freezing space (40), a baffle (37) is provided on the back surface of the weak freezing chamber, when the food is weakly frozen, the baffle (37) is opened to allow cold air to flow in, so as to perform a rapid freezing operation until the temperature reaches a temperature below the maximum ice crystal formation zone, and then a heater (43) is heated to maintain the weak freezing temperature zone. The present invention can provide a storage room layout which is convenient to use, and can keep the freshness and the taste of food when the food is preserved by using a weak freezing temperature zone.

Description

refrigerator

technical field

The invention relates to a cooling storage room of a refrigerator, in particular to a structure and a control method of an ice-making room, and a control method of a weak freezing room.

Background technique

In recent years, with the diversification of people's life, the capacity of refrigerators has become larger. Considering the frequent opening and closing of the door and the high frequency of use, the refrigerator with the largest volume of storage is arranged on the upper part of the refrigerator body, and the lower part is arranged Vegetable room and freezer room, at the same time, an ice-making room with an ice-making device and a temperature switching room that can switch the temperature in the box from freezing temperature to vegetable storage temperature into multiple temperature zones are usually set between the vegetable room and the freezer room.

Because it is necessary to set up multiple storage rooms with different storage temperatures, the original single cooler becomes a dedicated cooler for each temperature zone, such as a cooler for freezing temperature and a cooler for refrigerating temperature. The structure corresponding to the setting.

Furthermore, in such a cooling system having a plurality of coolers, in order to improve the cooling efficiency of the storage compartments, coolers corresponding to the temperatures of the respective storage compartments are installed behind the storage compartments. That is, the refrigerator for refrigeration is arranged beside the refrigerator compartment, and the vegetable compartment having a slightly higher temperature than the refrigerator compartment is also arranged close to the refrigerator compartment. The cooling cooler for freezing is installed on the back of the freezer compartment, and the ice making compartment and the temperature switching compartment which set the temperature of the freezer compartment are similarly arranged near the freezer compartment. This form is called the first form.

When freezing food, pass through the maximum ice crystal formation zone of the food as soon as possible, that is, -1 to -5°C, so that the cell tissue and freshness of the food can be frozen and preserved.

Therefore, when freezing food with a household refrigerator, it is generally to increase the freezing capacity by increasing the rotational speed of the compressor of the freezing cycle, etc., and to speed up the cooling speed of the food for rapid freezing. However, if the temperature of the food is below the optimal storage temperature, such as -18°C, the freezing degree will be too severe, and the food such as meat and sashimi will be difficult to cut with a knife.

In this regard, it has recently been known that if the freezing temperature of food is increased and frozen storage is carried out at -7 to -10°C (hereinafter referred to as the weak freezing temperature zone), although it cannot be stored for a long time, there is no problem in storing it for several weeks. problem, and it is convenient to cut with a knife when cooking, a refrigerator with a switching chamber that can be switched to various temperatures including a weak temperature zone has been proposed.

The switching chamber can be controlled as follows: when the indoor temperature is too high relative to the target set temperature, the air door arranged at the rear of the refrigerator is opened to send in cold air, and when the room temperature is low, the heater is used to heat to maintain the set temperature. This form is called the second form.

However, in the refrigerator of the first form, the ice making compartment is arranged at the lower part of the vegetable compartment, which is located below even in view of the overall layout of the refrigerator. Therefore, the body has to bend when taking out ice, and it is not suitable for use in summer and other periods when ice is frequently used. convenient.

Due to restrictions on the installation conditions of kitchens in Japan, the external dimensions of refrigerators have almost reached their limits in width, depth, and height. Therefore, the expansion of storage space is also limited, and customers' requirements for convenience are becoming stronger and stronger.

In the refrigerator of the second form, when food in a normal temperature state without freezing is put into a switching room set in a weak freezing temperature zone, because the temperature in this room is higher than the freezing room temperature of -25°C for example, the food temperature passes through the maximum. The temperature range of the ice crystal formation zone takes a long time, and is called slow freezing.

During slow freezing, the cell tissue of food is destroyed, the color of meat, etc. becomes black, the self-decomposition of protein and the oxidation of fat cause poor quality of food.

Moreover, when new food with a higher temperature than the weak freezing temperature zone is put in, as the indoor temperature rises, the temperature of the frozen food that has been stored in the weak freezing temperature zone also rises, and the taste and freshness of the food will decrease. The problem.

Contents of the invention

The present invention is made in order to solve the above-mentioned problems, and the purpose is to make the refrigerator of the first form respond to the diversified requirements of customers, and provide a refrigerator with an ice-making compartment arranged in the storage room by effectively disposing the cold air duct mechanism and the cooling machine to the storage room. An easy-to-use storage room layout in the corner of the refrigerator space.

And make the refrigerator of the second form provide a kind of refrigerator control method that does not make the food freshness and taste drop when the food is preserved in the weak freezing temperature zone.

The first aspect of the present invention is composed of: a refrigerating room arranged on the upper part of the refrigerator body for cooling by a cooler for refrigerating and a fan for refrigerating; , a vegetable compartment arranged in the storage space between the aforementioned refrigerator compartment and the freezer compartment, an ice-making compartment arranged in a corner of the bottom of the aforementioned refrigerator compartment with heat insulation and equipped with an automatic ice-making device, and an ice-making compartment arranged at the back of the ice-making compartment. The fan composition is characterized in that the cold air generated by the cooler for freezing is sent to the ice-making chamber through the pipe and the ice-making fan, and the above-mentioned pipe including the fan for freezing and the return pipe from the ice-making chamber are arranged in the vegetable compartment. back of the room.

This structure increases the height of the ice-making compartment, and the ice can be easily taken out without bending the body when using ice. Extending the pipeline, since the refrigeration cooler, cooling fan, cold air pipeline and return pipeline are arranged on the back of the storage room, the volumetric efficiency of the refrigerator is not affected, and the shape of the back of each storage room is flattened, which can be effectively used Accommodate space.

A second aspect of the present invention is characterized in that the cold air generated by the refrigerating cooler directly passes through the cold air duct and is sent into the ice making chamber by the ice making fan.

A third aspect of the present invention is characterized in that the cold air generated by the cooler for freezing and sent into the freezing compartment is sent into the ice making compartment through the cold air duct and the fan for the ice making compartment.

This structure can reliably send low-temperature cold air into the ice-making chamber separated from the freezing cooler.

A fourth aspect of the present invention is characterized in that, during the ice making process, in addition to the defrosting operation of the freezer cooler, the fan for the ice making compartment is also operated.

This structure keeps the ice-making fan running at all times, thereby increasing the ice-making speed, and is not affected by the temperature of the high-temperature freezing cooler during the defrosting operation, so it can prevent the temperature of the ice-making chamber from rising and does not affect the ice-making process. ice speed.

A fifth aspect of the present invention is characterized in that it has a refrigeration cooling mode in which a refrigerant is flowed into a cooler for refrigeration to cool the refrigerator compartment and a vegetable compartment, and a refrigerant is flowed into a cooler for freezing to cool the freezer compartment and the ice making compartment. A device for switching between freezing and cooling modes for compartment cooling. The fan for the ice making compartment operates at a low speed in the refrigeration cooling mode and at a high speed in the freezing mode.

The structure can effectively and reliably cool the ice-making chamber, so that the fan used in the ice-making chamber can run in a power-saving manner.

A sixth aspect of the present invention is characterized in that there is a rapid ice-making mode for rapidly cooling the ice-making compartment, and the fan for the ice-making compartment operates at high speed for a predetermined period of time in the rapid ice-making mode to produce ice at high speed and efficiently.

A seventh aspect of the present invention is characterized in that it has a refrigeration cooling mode in which refrigerant flows into the refrigerator for refrigeration to cool the refrigerator compartment and the vegetable compartment, and a refrigerant flows into the cooler for freezing to cool the freezer compartment and the vegetable compartment. The device for switching between the freezing and cooling modes of the ice compartment cooling also has a rapid ice making mode for rapidly cooling the ice making compartment. In the rapid ice making mode, the speed of the compressor and the ice making fan is increased to increase Freezing ability, can make ice quickly.

The eighth aspect of the present invention is characterized in that during the stop of the ice making operation, the fan for the ice making compartment is stopped when the temperature of the ice making compartment is below a predetermined temperature, so that not only the stored ice can be kept in a good state, but also the ice making compartment can be kept in good condition. I realize energy saving by the operation of the fan.

A ninth aspect of the present invention is characterized in that the fan for the ice making compartment is operated in the pump stop mode for recovering the refrigerant from the freezer compartment cooler.

This structure can increase the amount of heat exchange between the air in the freezer space and the cooler for freezing by operating the fan for the ice-making compartment, and can quickly recover the refrigerant.

Description of drawings

Fig. 1 is a front view of a refrigerator according to an embodiment of the present invention with a door removed.

Fig. 2 is a front view of the store room in Fig. 1 with a back surface removed.

FIG. 3 is a cross-sectional view of a portion of the ice making compartment of FIG. 1 .

Fig. 4 is a longitudinal sectional view showing the duct structure of the refrigerated space portion of Fig. 1 .

Fig. 5 is a cross-sectional view along line A-A of Fig. 2 .

Fig. 6 is a cross-sectional view along line B-B of Fig. 2 .

Fig. 7 is a control flowchart of an embodiment of the present invention.

Fig. 8 is a schematic diagram of a refrigeration cycle according to an embodiment of the present invention.

Fig. 9 is a schematic diagram of a cold air duct according to an embodiment of the present invention.

Fig. 10 is a schematic diagram of a cold air duct in another embodiment of Fig. 9 .

Fig. 11 is a schematic diagram of a cold air duct according to still another embodiment of Fig. 9 .

Fig. 12 is a front view of a refrigerator in still another embodiment of the present invention with a door removed.

Fig. 13 is an enlarged longitudinal sectional view of the main part of the refrigerator shown in Fig. 12 .

Fig. 14 is an explanatory diagram of a refrigerating cycle of the refrigerator shown in Fig. 12 .

Fig. 15 is a flow chart of the control system of the refrigerator shown in Fig. 12 .

Fig. 16 is a temperature change diagram of the weak freezer compartment when stored in the weak freezer temperature zone.

Fig. 17 is a flow chart of the storage control of the food contained in the weak freezing chamber in the weak freezing temperature zone.

Detailed ways

An embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is a front view of the refrigerator main body 1 showing the arrangement state of each storage compartment with the doors omitted, and the storage space is formed by the inner box 3 provided inside the outer box 2 with an unillustrated heat insulating material interposed therebetween, and is divided by a heat insulating wall. into multiple storage rooms.

5 is the refrigerating room that is used most frequently in each storage room and is installed at the top of the refrigerator body for easy confirmation and removal of indoor storage items. The front opening is rotatably mounted on the body by a hinge device not shown The door closes.

In the lower part of the refrigerator compartment 5, a vegetable compartment 7 is formed through a partition plate 6, and is used for storing vegetables at a slightly higher temperature than the refrigerator room temperature.

Below the vegetable compartment 7, a freezer compartment 9 for accommodating frozen food is arranged via a heat insulating partition wall 9. As shown in FIG. The freezer compartment 9 is divided into upper and lower layers, and a quick freezing corner 10 is provided on the upper layer.

The front openings of the above-mentioned vegetable compartment 7 and freezer compartment 9 are closed with unshown doors, and a frame extended to the storage room is installed on the inside of the door. The ball shown in the figure engages and slides with the track member provided on the inner wall of the box, so that the container can be drawn out in the front-back direction.

An ice making room 12 partitioned by a heat insulating wall 11 is formed at a lower corner of the space of the refrigerating room 5 . The ice-making room 12 is equipped with an automatic ice-making device 14 that obtains water from the water supply tank 13 in the refrigerating room 5 on the top and makes ice, and is equipped with a withdrawable storage box that accepts the ice made. The ice compartment 12 is cooled to a freezing temperature by receiving cold air from a refrigerating cooler 27 to be described later.

When the ice-making detection sensor 55 installed outside the bottom of the ice-making tray detects -19oC, the automatic ice-making device 14 considers that all the water in the ice-making tray is frozen, that is, the ice-making is over, and proceeds to make the ice in the ice-making tray fall to the bottom. Ice pouring action from ice storage container. Torque is applied to the ice tray to separate the ice by inverting it and restricting the rotation of one side end while rotating through 180 degrees.

In addition, there is an ice detecting rod for detecting the amount of ice stored. Before pouring ice, it moves to the bottom of the ice storage container to measure the amount of ice. When the amount of ice stored is large, the ice detecting rod touches the surface of the ice and cannot move downward When the ice is full, it detects the ice-full state, so as to stop the subsequent ice pouring and water supply actions, and it is in a standby state until the ice is taken out and the ice storage capacity decreases.

In the refrigerated space at the side of the ice making room 12, there is provided a temperature switching room 15 which is thermally insulated like the ice making room 12. The temperature switching chamber 15 controls the cold air flow by opening and closing the cold air baffle 16 on the upper part of the side wall of the ice making chamber 12, and can perform freezing temperatures of -18°C, weak freezing temperatures of about -7°C, and 0°C. There are multiple levels of temperature control from chilling temperature at +1-2°C to chilling temperature at +8°C for wine cooling, and you can change the indoor temperature setting as needed. However, when the temperature switching chamber 15 is set to a weak freezing temperature, it corresponds to a weak freezing chamber described later.

Each storage room is shown in Figure 7, and its control device 40a is based on the temperature sensor 51 for refrigerating that detects the temperature in the refrigerating room space, the temperature sensor 52 for freezing that detects the temperature of the freezer compartment 9, and the temperature for making ice that detects the temperature of the ice-making compartment 12. Sensor 53, the switching chamber temperature sensor 57 for detecting the temperature of the temperature switching chamber 15, and the detection value of the external air temperature sensor 58 for detecting the external air temperature start the fan, cold air damper 16, compressor 41, etc. described later to adjust the temperature inside the box. temperature.

On the back side of each of the storage rooms, as shown in FIG. 1 , which is a front view of the state without the back of each storage room, that is, FIG. 2 , coolers and ducts for supplying cold air (arrows) to each storage room are arranged.

That is, a cooler 21 for refrigeration is arranged at the center of the back surface of the refrigerator compartment 5, and a fan 22 for refrigeration is provided at the upper part thereof. The refrigerating fan 22 , the refrigerating fan 28 , and the ice-making fan 31 to be described later are frequency-converted controlled by the control device 40 a, and their rotational speeds can be changed synchronously with the temperature in the cabinet, the operation mode, or the compressor 41 . A cold air outlet 23 leading to the top of the refrigerator compartment is provided in front of the fan 22 for refrigeration, and a duct 24 is formed in the up-and-down direction from the upper part of the reverse side of the back side of the refrigerator compartment to both sides. The air outlet 25, for example, blows cold air to the shelves 17 of the refrigerating chamber 5 one by one, so as to cool the refrigerating chamber.

The above-mentioned structure arranges the cooler for refrigeration on the back of the large-area refrigerator room to increase the capacity and cooling capacity of the cooler. Even if the evaporation temperature is increased, the room can be sufficiently cooled, so the absorption of food moisture can be reduced to prevent food from drying out. . Moreover, both sides of the utility model can be used as pipelines, which can make indoor and outdoor flat, and can effectively use the storage space.

In addition, a cold air inlet 26 is arranged on the lower back of the refrigerator compartment 5 to suck in the cold air circulating in the refrigerator compartment and send it back to the cooler 21 .

A cooler 27 for freezing is provided on the back of the freezer compartment 9 below the refrigerator main body. Freezing fan 28 is set above the cooler 27 for freezing, so as to blow cold air into the freezing chamber, and at the same time, a part of cold air is guided to the ice-making fan 31 located at the back of the ice-making chamber 12 from the pipeline 30 extended upwards, thereby to The ice making compartment 12 is blown out.

Between the ice-making fan 31 and the temperature switching chamber 15, as shown in the partially enlarged cross-sectional view of the ice-making chamber in FIG. The pipe 32 leading to the switching chamber is blown into the temperature switching chamber 15 through the cold air damper 16 .

The aforementioned cold air damper 16 for the temperature switching chamber is buried in the isolation portion between the ice making chamber 12 and the temperature switching chamber 15, so as not to reduce the storage space. In addition, the pipeline 30 leading to the ice-making compartment 12 can be utilized, so it is not necessary to provide a dedicated pipeline space for the temperature switching chamber 15, and the storage space can be effectively utilized.

Cold air inlets 34, 35 are respectively formed in the ice-making chamber 12 and the temperature switching chamber 15, and the ice-making chamber return duct 36 and the switching chamber return duct 37 from the back side of the vegetable compartment 7 to the ice-making compartment 9 are respectively arranged to circulate cold air. Return to the cooler 27 for freezing.

These cold air circulation ducts are shown in the longitudinal sectional view of Fig. 4, the sectional view of Fig. 5 along the A-A line of Fig. 2 and the sectional view of Fig. 6 along the B-B line of Fig. 2, leading to the cold air duct 30 of the ice making chamber The return ducts 36 and 37 from the ice making compartment and the switch compartment, the freezing cooler 27 and the freezing fan 28 are arranged in parallel with the return ducts 36 and 37 at the back of the freezing compartment 9 or the vegetable compartment 7 .

This structure can minimize the unevenness on the back of the storage room, reduce the protruding parts toward each room, effectively utilize the volume utilization efficiency of the vegetable room 7 and the vegetable room 9, and facilitate the use of indoor space, and the above-mentioned parallel arrangement makes each pipeline Straight line, simple structure, no resistance loss caused by pipe bending, and efficient cooling air supply.

And, on the back of the refrigerator body 1 from the vegetable compartment 7 to the temperature switching chamber 15, a concave portion 39 is set at a position parallel to the freezing cooler 27, the freezing fan 28, or each pipeline 30, 36, and a control system for controlling the operation of the refrigerator is provided in the concave portion. The control circuit backplane 40.

Hereinafter, description will be made with reference to the operation modes of the refrigerator. Fig. 8 is a schematic diagram illustrating the refrigeration cycle of the present invention. The high-temperature refrigerant discharged from the compressor 41 disposed in the lower mechanical room behind the freezing chamber 9 releases heat in the condenser 43, and the flow path is controlled by the switching valve 42 to cool the refrigerating cooler 21 or the freezing cooler 27, and implement In the alternating cooling operation mode, the refrigerating cooling mode and the freezing cooling mode described later are alternately performed.

The refrigerated cooling mode starts to work when the temperature of the refrigerated space is higher than the set temperature. In this mode, the switching valve 42 is switched so that the refrigerant flows into the capillary tube 44 and evaporates in the refrigerating cooler 21 to cool the refrigerating space. At this time, the refrigeration fan 22 operates in synchronization with switching of the refrigerant flow path, and blows cold air into the refrigeration space for cooling. The refrigerant vaporized after exchanging heat with the cooler returns to the compressor 40 .

Freezer mode starts to work when the temperature in the freezer space is higher than the set temperature. In this mode, the switching valve 42 is switched to switch the refrigerant flow path, so that the refrigerant flows into the capillary tube 48 and evaporates in the refrigeration cooler 27, and returns to the compressor 41 through the accumulator 45 and the one-way valve.

Then, in synchronization with switching of the refrigerant flow path leading to the refrigeration cooler 27, the refrigeration fan 28 is operated at a normal rotation speed to cool the refrigeration space.

In the defrosting mode, power is supplied to a defrosting heater 47 such as a glass tube heater provided at a lower portion of the refrigerated cooler 27 to defrost the refrigerated cooler 27 . The defrosting mode is performed at a timing when, for example, the accumulated operation time of the compressor 41 reaches 8 hours, and starts after switching to the refrigeration mode. Then, after the refrigerated cooler 27 is heated to a predetermined temperature, such as 3° C., by the defrosting sensor 56 provided on the refrigerated cooler 27, the defrosting mode ends and the cooling operation returns.

During the rapid ice-making mode, it is started by pressing the buttons on the operation panel 54 on the surface of the refrigerator door, fully opening the cold air damper 16, making the ice-making fan 31 rotate at a high speed, and reducing the amount of cold air sent to the ice-making compartment. Increase until the end of ice making or the rapid ice making mode is released.

In the pump stop mode, when switching between the refrigeration mode and the freezing mode, the switching valve 41 is closed, and the compressor 40 is rotated for a predetermined time, such as 30 seconds, so that the refrigerant remaining in the refrigeration cooler 27 is recovered.

The cooling mechanism of each storage compartment will be described below.

The cold air cooled by the aforementioned coolers 21, 27 is blown out in each storage room space under the respective effects of the refrigerating and freezing fans 22, 28 on its top, and the cold air blown out will cool each refrigerating room as shown by the arrow, and then from The suction port returns to the cooler, and this cycle is repeated to cool each storage chamber to a prescribed temperature and maintain it.

In the refrigerating room 5, a part of the cold air from the cooler 21 for refrigerating is blown out to the top of the refrigerating room under the action of the fan 22 for refrigerating. The cold air outlets 25 pierced at regular intervals in the upper and lower directions of the pipeline 24 are blown into the refrigerating chamber, and the cold air circulated in the refrigerating chamber returns to the cooler 21 from the suction port 26, and the cycle of cold air is repeated.

After the refrigerating chamber is cooled to the specified temperature, stop the operation of the fan 22 for refrigeration, and when the indoor temperature rises above the specified temperature after the cooling effect is stopped, the fan 22 is driven again to perform the cooling effect of the cold air circulation.

The cooling control of the freezing space is basically the same as the control of the aforementioned refrigerating chamber. The cold air from the cooler 27 for freezing is sent to the freezing chamber 9 by the fan 28 for freezing, and at the same time, it is sent upwards from the center of the back of the vegetable compartment 7 on the upper part of the freezing chamber. The air duct 30 is guided into the ice making compartment 12 provided at a corner of the upper refrigerator compartment space.

The rotation of the third fan on the back of the ice-making compartment, that is, the ice-making fan 31, blows part of the cold air from the freezing fan 28 into the ice-making compartment 12, and part of it passes through the switching chamber duct 32 and the cold air damper 16. It is introduced into the adjacent temperature switching chamber 15 and cooled.

The cold air baffle 16 changes the opening area of the cold air outlet according to the set temperature to control the inflow of cold air, thereby maintaining the inside of the temperature switching chamber 15 at a predetermined temperature range such as the aforementioned freezing temperature or chilling temperature.

The cold air after cooling the ice making room 12 and the temperature switching room 15 is returned from the ice making room return line 36 and the switching room return line 37 formed on both sides of the aforementioned air supply line 30 on the back of the vegetable compartment 7. The cooler 27 for freezing merges with the cold air circulated in the freezer compartment 9 to be cooled again, and continues the cold air circulation cycle.

However, the storage room located at the side of the ice making room 12 is not limited to the temperature switching room of the above-mentioned embodiment, even if it is a special room for chilling temperature lower than the temperature of the refrigerator room or a rapid cooling room, it can be used as a cooling room at will. set to use.

A modified example of the present invention will be described below.

(Modification 1)

FIG. 9 is a schematic diagram illustrating the duct structure of the first embodiment, and FIG. 10 is a schematic diagram of the duct structure of Modified Example 1. As shown in FIG.

In the first embodiment of the present invention, as shown in FIG. As shown in Figure 10, the cold air generated by the freezing cooler 27 is blown into the freezer compartment 9 by the fan 28 for freezing, and the air in the freezer compartment space is blown to the ice-making compartment by the ice-making fan 31 through the pipeline located at the rear of the freezer compartment. Room 12.

In addition, as shown in FIG. 11 , the cold air generated by the refrigerated cooler 27 may also be blown to the ice-making chamber 12 by the ice-making fan 31 after passing through the pipeline directly. In this case, the freezing fan 28 can be arranged under the freezing cooler 27, and this structure can improve the freezing capacity of the freezing chamber 9 and reliably cool the ice making chamber.

(Modification 2)

During the ice-making process of the automatic ice-making device, in addition to the defrosting mode, the fan 31 for ice-making must be operated.

During the defrosting operation, the temperature of the cooler 27 for freezing is relatively high. If the air in the higher temperature environment is blown into the ice-making chamber 12, the indoor temperature will rise significantly. Not only the ice-making time will be prolonged, but also the stored Ice will melt. Also, in the refrigeration mode, although the freezing cooler 27 is not cooled, the temperature of the cooler is kept at a low temperature, and the ice making compartment 12 continues to be cooled by operating the ice making compartment fan 31 .

Therefore, in addition to the defrosting mode, the ice making compartment fan 31 is operated even when it is not in the freezing mode, so that the ice making time can be shortened and the temperature inside the box can be reliably maintained.

(Modification 3)

In the refrigeration mode, the ice-making fan 31 is operated at a low speed, and in the freezing mode, the ice-making compartment fan 31 is operated at a high speed.

In the refrigerating mode, since the freezer cooler 27 is not cooled, the difference from the normal high-speed operation is small regardless of whether the ice-making fan 31 rotates at a high speed or at a low speed. Therefore, by operating the ice-making fan 31 at a low speed in the refrigeration mode, the ice-making compartment 12 can be reliably cooled while saving power.

(Modification 4)

Once the user sets the rapid ice-making mode using the operation panel 54, the user enters the rapid freezing mode for an arbitrary predetermined time, for example, 8 hours. The ice-making fan 31 runs at a high speed until the water in the water supply tank 13 is used up, or it is detected that the ice storage is full. This produces ice quickly and efficiently.

(Modification 5)

Once the user sets the rapid ice-making mode using the operation panel 54, once the set temperature of the freezer compartment 9 is set to -20°C, for example, the predetermined temperature is lowered by, for example, 3K.

The ice-making fan 31 and the compressor 41 operate synchronously. Once the set temperature of the freezer compartment 9 is lowered, the actual indoor temperature will be higher than the set temperature, and the compressor 41 increases the rotation speed in order to improve the freezing capacity. Therefore, the rotation speed of the ice-making fan 31 synchronously operating with the compressor 41 also increases automatically, and the freezing capacity is improved to make ice-making rapidly.

(Modification 6)

When the ice making operation stops, the rotation speed of the ice making fan 31 is adjusted to maintain the indoor temperature of the ice making chamber 12 . That is, when the ice-making operation is stopped, as long as the stored ice does not melt, the speed of the ice-making fan 31 can be reduced to effectively cool the ice-making chamber 12, keep the ice well, and effectively operate the ice-making function. Fan 31, to save electricity. At this time, when the temperature in the ice making chamber is low, the ice making fan 31 may be stopped.

(Modification 7)

In the pump stop mode, the ice-making fan 31 is operated. The pump is stopped when the cooling mode is switched, and it is desirable to recover the refrigerant in the refrigerating cooler 27 to the compressor 41 as quickly as possible. By operating the ice making fan, the amount of heat exchange between the air in the refrigerating space and the refrigerating cooler can be increased, so that the refrigerant can be quickly recovered.

Other embodiments of the present invention will be described below with reference to the drawings. Fig. 12 is a front view of the refrigerator without the door of the present invention, and Fig. 13 is a longitudinal sectional view of its main part.

The refrigerator 101 is formed by a heat-insulating box, and is divided into a refrigerating space 130 and a freezing space 140 by a heat-insulating wall.

Refrigerator space 130 is partitioned into refrigerator compartment 104 and vegetable compartment 105 by refrigerator partition wall 103 , and ice maker compartment 109 is formed below refrigerator compartment 104 .

The first freezer compartment 107 is formed in the upper part of the freezer space 140 , the second freezer compartment 108 is formed in the lower part thereof, and the weak freezer compartment 106 is formed on the right side of the first freezer compartment 107 .

An evaporator for refrigeration (hereinafter referred to as R evaporator) 110 and a cooling fan for refrigeration (hereinafter referred to as R fan) 111 are arranged on the back side of the refrigerator compartment 104. The R fan 111 is controlled according to temperature fluctuations in the cabinet and opening and closing of the door. Freezing evaporators (hereinafter referred to as F evaporators) 112 and freezing cooling fans (hereinafter referred to as F fans) 113 are arranged on the back walls of the first and second freezing chambers 107 and 108, and each performs cold air circulation independently to make the refrigerated space 130 And the freezing space 140 is cooled.

The ice-making compartment 109 is disposed on the lower left side of the refrigerating compartment 104 and is surrounded by a heat insulating wall, and is separated from the refrigerating compartment 104 for indoor temperature control.

Ice compartment duct 129 is provided from F evaporator 112 to the back of ice compartment 109 , and ice compartment fan (hereinafter referred to as I fan) 131 is provided above ice compartment duct 129 .

To make ice, the cold air from the fan 113 is blown to the ice making chamber 109 by the I fan 131 through the pipeline 129 for the ice making chamber, and blown to the ice making tray. Thereby the water in the ice making tray is frozen, and once the freezing is over, the driving device makes the ice making tray 132 rotate, overturn, twist, so that the ice breaks away from the ice making tray and falls to the storage bin 133 for storage.

The weak freezer compartment 106 is adjacent to the first freezer compartment 107 across the insulation wall 134, and the top surface 102, the bottom surface 135 separated from the second freezer compartment 108, and the right side wall of the refrigerator body and the back wall 136 are all covered by the insulation wall. Formed, the upper part of the back wall 136 is provided with a baffle 137 for controlling the cold air flowing into the weak freezer compartment 106, and the bottom surface 135 is provided with a cold air outlet 138 leading from the weak freezer compartment 106 to the F evaporator.

A container 139 for storing food crystals is arranged inside the weak freezer compartment 106, which is mounted on the door of the weak freezer compartment 106 opening and can be drawn out freely.

The lower back side of the weak freezing chamber 106 is provided with a temperature sensor (hereinafter referred to as S sensor) 141 for weak freezing made of a thermal thermometer for detecting the indoor temperature. Behind the rear surface 136 is provided a cooling fan (hereinafter referred to as an S fan) 142 for a weak freezer compartment that sends cold air to the damper 137 of the weak freezer compartment 106 .

A heater 143 for raising the temperature inside the weak freezer compartment 106 is provided on the bottom surface 135 of the weak freezer compartment 106 .

Below the F evaporator 112, a glass tube heater 146 as a defrosting device is provided, and when the accumulative operation time of the compressor 115 reaches 8 hours, the defrosting operation of heating by the heater is started. The end of defrosting sensor (hereinafter referred to as D sensor) 147 on the upper end of defrosting detects that the temperature of the F evaporator rises to a specified temperature such as 3oC.

During the operation of the quick freezing operation described later, even if the defrosting start time comes, the defrosting operation is not started, but waits until the quick freezing is completed.

A compressor 115 is provided in a machine room 114 formed at the lower part of the back wall of the refrigerator 101, and a condenser and various pipings forming a refrigeration cycle together with the compressor are provided. In addition, a fan (hereinafter referred to as a C fan) 125 is provided near the condenser 121 .

FIG. 14 shows the refrigeration cycle of the refrigerator 101 . The refrigerant discharged from the compressor 111 passes through the condenser 121 and then is switched to the refrigerant passage by the three-way valve 122 .

One outlet of the three-way valve 122 is connected to the refrigeration capillary 123 and the R evaporator 110 in sequence, and the other outlet is connected to the freezing capillary 124 , the F evaporator 112 and the accumulator 116 in sequence. The three-way valve 122 can be switched and controlled into the following four flow states: the refrigerant is only sent to the R evaporator 110 side, the refrigerant is only sent to the F evaporator 110 side, and the refrigerant is sent to the F, R evaporator 110, The fully open state of both sides of 112 is a fully closed state in which all refrigerant passages are blocked by valve 122 .

The outlet pipe of the accumulator 116 is connected to the check valve 117 in the machine chamber 114 , and the outlet side of the check valve 117 joins the outlet pipe of the R evaporator 110 and is connected to the suction side of the compressor 115 .

FIG. 15 is a block diagram of a control system of refrigerator 101 . As shown in the figure, the control unit 164, which is composed of a microcomputer installed on the upper back of the refrigerator 101 to control the refrigerator, is connected with the compressor 115 that drives the refrigerating cycle and the R that discharges the cold air from the FR evaporators 110 and 112 to each storage room. Fan 111, F fan 113, C fan 125, I fan 131, S fan 142, baffle plate 137 for adjusting cooling air volume, R sensor 144, F sensor 145, S sensor 141, D for detecting each room temperature and controlling and adjusting each cooling machine The sensor 147 is connected to the operation unit 118 provided on the door of the refrigerator 104 for various operation control and display.

Here, the temperature control operation in the refrigerator 101 that is normally performed will be described. After being compressed and pressurized by the compressor 115, the high-temperature refrigerant releases heat in the condenser 121, then enters the three-way valve 122, and switches the flow path to the R evaporator or F evaporator 112 for evaporative cooling, so as to perform the following refrigeration mode and Alternate operation in which freezing mode alternates.

The refrigerated mode is used to keep the temperature of the refrigerated space 130 at a specified set temperature. When the temperature of the refrigerated space rises above the set value, the three-way valve 122 is switched to allow the refrigerant to flow from the refrigerated capillary 123 into the R evaporator 110 side, Cold air generated by evaporation is introduced into the refrigerating space 130 to cool the room. The evaporated refrigerant returns to the compressor 115, but in the refrigeration mode, in order to prevent the refrigerant from flowing into the F evaporator 112, which has a lower evaporation temperature than the R evaporator 110, and condense again, the flow path on the F evaporator 112 side Top mount check valve 117.

During the cooling process of the R evaporator 110, the R fan 111 is driven while switching the refrigerant flow path, and cold air is blown into the refrigerated space 130 to cool the room.

The freezing mode is activated when the temperature of the freezing space 140 is higher than a set temperature. In this mode, the refrigerant flow path is switched through the three-way valve 122, so that the refrigerant flows into the refrigeration capillary 124, evaporates in the F evaporator 112, and returns to the compressor 115 through the accumulator 116 and the one-way valve 117 to form a refrigeration cycle.

In the freezing mode for cooling the F evaporator, the F fan 113 is operated at a normal rotation speed while switching the refrigerant flow path to cool the inside of the cabinet.

The case of storing the food placed in the weak freezer in the weak temperature zone (-5 to -10°C) will be described with reference to the flow charts in Fig. 16 and Fig. 17 .

In step 1 (S1), the food at normal temperature is put into the container 139 of the weak freezer 106 and the door is closed, and the customer instructs the preservation temperature of the food through the operation part 118 (S2). The storage temperature is set between -5 and -10°C, which is a weak freezing temperature zone where food can be easily cut with a knife, and is set to -8°C here.

In step 3, the customer turns the weak freezing switch of the operation part 118 on (ON). In this way, the control unit 164 switches the refrigerating cycle to the refrigerating mode, the F fan 113 rotates at a higher rotation speed than usual, and the S fan 142 also rotates.

Then, the damper 137 is opened, and the cold air from the F evaporator 112 is supplied to the weak freezer compartment 106. As shown in FIG. The set temperature with a lower lower limit is -10°C in this example. At this time, the heater 143 is not powered.

During the rapid freezing operation, the food placed in the container 139 is cooled, and quickly passes through the temperature zone where the food moisture is most likely to freeze, that is, the maximum ice crystal formation zone of -1 to -5°C, so the taste and quality of the food can be preserved. Freeze food without compromising its freshness.

Continue the rapid freezing operation, when the food temperature detected by the S sensor 141 drops below -10°C, stop the rapid freezing operation, and continue the rapid freezing of step 4 (S5) when it is above -10°C.

In step 6, the damper 137 is closed, the S fan 142 is stopped, and the heater 143 is heated. At this time, PID control was performed so as not to exceed -5°C. The PID constants are preferably set not to exceed the time to reach the target temperature. As shown in Figure 5, once the food temperature rises to -8°C, the heater 143 is stopped (S7), and then the baffle plate 137 is opened and closed to keep the temperature in the box controlled at -8°C (S8).

In this way, the rapid freezing operation is carried out to quickly pass through the maximum ice crystal formation zone, and the food does not lose taste and freshness. Then, it is stored in a weak freezing temperature zone, and the food can be frozen and stored in an easy-to-cut state. At this time, the food that has been stored in the weak freezer will be cooled to a temperature lower than that of the weak freezer, but the temporary temperature drop will not affect the freshness and taste of the food, and it can be stored well.

Even if the weak freezing compartment 106 is provided in the freezing space 140, the temperature can be easily raised to the weak freezing temperature zone by heating the heater 143 on the bottom surface.

The rapid freezing operation continues until the temperature is lower than the lower limit temperature of the maximum ice crystal formation zone, so even large-volume foods such as meat can be cooled below the maximum ice crystal formation zone, regardless of the food volume. It can evenly and well preserve the freshness and taste of food.

Rapid operation may cause a difference between the temperature of the food and the temperature in the box, but as long as the temperature difference between the temperature in the box and the temperature of the food is measured in advance according to the type and size of the food, the food will reach the lower limit of the maximum ice crystal formation zone The temperature inside the box is determined according to the type and size of the food. Once the customer enters the type and size of the food through the operation department and selects the most accurate set temperature for rapid operation, the food can be reliably cooled to the maximum ice crystallization Below the lower limit value of the generated band. In addition, if the temperature of the food is directly detected by an infrared sensor or the like, it can be cooled more reliably below the maximum ice crystal formation zone.

In addition, since the heater is controlled so as not to exceed the lower limit of the maximum ice crystal formation zone, the weak freezing temperature zone can be reliably maintained.

In addition, heating in the defrosting operation is not performed during the rapid freezing operation, and even if it is time to start defrosting during the rapid freezing, the rapid freezing can be performed with priority, and the freezing capacity can be maximized.

In the embodiment of the present invention, the weak freezer compartment 106 is set in the freezer compartment 108, but it is not limited thereto. It can also be separated from the freezer compartment and have an independent door, or it can be switched to a predetermined temperature including a weak freezer temperature zone. Belt temperature switching chamber 15.

Invention effect

To sum up, the ice-taking position of the ice-making compartment is near the waist of the user. When using ice, the body can easily take out the ice without leaning forward, which is convenient to use. The cold air is introduced into the pipeline of the upper ice-making room, and by installing the freezing cooler and cooling fan, the cold air pipeline and the return pipeline on the back of the storage room, the volumetric efficiency of the box can not be damaged, and each storage room can The shape of the back of the chamber is flattened, making effective use of the placement space.

In addition, because the food is quickly frozen in the weak freezer, and then stored in the weak freezing temperature zone after passing through the maximum ice crystal formation zone quickly, the cellular tissue of the food will not be damaged, so it can maintain the original taste and be preserved in a fresh state.

Claims (9)

1. refrigerator, by: the refrigerating chamber that is arranged on refrigerator body top, utilizes refrigeration to cool off with fan with cooler and refrigeration; Be configured in the refrigerator body bottom, utilize freezing with cooler and the freezing refrigerating chamber that cools off with fan; Be arranged on the vegetable compartment in the storage space between aforementioned refrigerating chamber and the refrigerating chamber; The heat insulation ice-making compartment that is disposed at one jiao of aforementioned refrigerating chamber bottom, has automatic ice-making plant; The ice making that is arranged on this ice-making compartment back is formed with fan, it is characterized in that, to carry to ice-making compartment by pipeline and ice making fan with the freezing cold air that generates with cooler, and will comprise freezing with fan aforementioned pipeline and from the return pipeline of ice-making compartment and be located at the back side portion of vegetable compartment.

2. refrigerator according to claim 1 is characterized in that, is directly sent into ice-making compartment by ice making with fan by cold duct with the freezing cold air that generates with cooler.

3. refrigerator according to claim 1 is characterized in that, sends into ice-making compartment by cold duct and ice making with fan with the freezing cold air that generates and send into refrigerating chamber with cooler.

4. refrigerator according to claim 1 is characterized in that, in the ice-making process, during except freezing defrosting running with cooler, make the ice making fan running.

5. refrigerator according to claim 1, it is characterized in that, have flow into cooler to refrigeration cold-producing medium with the refrigeration refrigerating mode of refrigerating chamber and vegetable compartment cooling, and carry out device for switching between with freezing refrigerating mode with refrigerating chamber and ice-making compartment cooling to the freezing cold-producing medium that flows into cooler, ice-making compartment runs up when frozen mode with fan low-speed running when refrigerating refrigerating mode.

6. refrigerator according to claim 1 is characterized in that, has the ice-make mode rapidly that ice-making compartment is cooled off rapidly, and ice-making compartment runs up in the stipulated time in ice-make mode rapidly with fan.

7. refrigerator according to claim 1, it is characterized in that, have flow into cooler to refrigeration cold-producing medium with the refrigeration refrigerating mode of refrigerating chamber and vegetable compartment cooling, and carry out device for switching between with freezing refrigerating mode with refrigerating chamber and ice-making compartment cooling to the freezing cold-producing medium that flows into cooler, also have the ice-make mode rapidly that ice-making compartment is cooled off rapidly, in ice-make mode rapidly, increase the refrigerating capacity of refrigerated cooler by the rotating speed that increases compressor and ice making fan.

8. refrigerator according to claim 1 is characterized in that, during the ice making action process of stopping is ended, when the ice making indoor temperature makes ice-making compartment stop with fan when set point of temperature is following.

9. refrigerator according to claim 8 is characterized in that, reclaiming the pump stop mode of cold-producing medium from the refrigerating chamber cooler, makes the ice-making compartment fan running.

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