CN2842324Y - Electric refrigerator - Google Patents

Abstract

The utility model relates to a refrigerator, which comprises a freezing room, a cold room and a soft freezing room. A space sensor is arranged in the soft freezing room. After the food is put in, the deep freezing is carried out at first, so that the food is quickly frozen to the set temperature, and then returned to the refrigerator. The original setting state avoids the destruction of food nutrition by progressive freezing. The temperature of the soft freezer can also be adjusted to any temperature between -25°C and -5°C.

Description

refrigerator

technical field

The utility model relates to an electric refrigerator, in particular to a temperature-variable refrigerator with a soft freezing chamber.

Background technique

Traditional refrigerators are generally dual temperature zone refrigerators with a refrigerator and a freezer. The temperature of the freezer is generally below -18°C to meet the needs of long-term food storage. However, many foods in daily life do not need to be stored for a long time. Excessive freezing causes inconvenience in eating, and also destroys food nutrition and wastes electricity during the freezing and thawing process. In order to meet energy-saving needs and convenience, there are refrigerators with soft freezing function on the market. The so-called soft freezing refers to freezing food to -5-9°C. In this temperature range, frozen meat can be easily cut. The destruction of nutrition, so it is especially suitable for storing food that does not need to be stored for a long time. A kind of refrigerator disclosed as Chinese Patent Application No. 01115141.2 is a kind of refrigerator with a soft freezer. But the present refrigerator with soft freezer also has the following defects: because the temperature of the soft freezer is generally controlled at -5--9°C, it just exceeds the maximum ice crystal formation zone (-1--5°C) that is most likely to destroy food nutrition. ), so in order to improve the freshness of food, it is best to pass through this temperature zone quickly during the soft freezing process, but ordinary refrigerators with soft freezing function, because the indoor temperature sensor cannot accurately sense the temperature change, the freezing process is intermittent, Gradually reach the temperature that needs to be frozen. This intermittent freezing method just makes the freezing process stay in the maximum ice crystal formation zone (-1--5°C) for the longest time, which affects the freshness of food.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned defects and provide a refrigerator with a soft freezer, which can deep freeze the newly put food first, and quickly pass through the ice crystal zone (-1--5°C), ensuring that the food fresh-keeping effect.

The purpose of this utility model is achieved in that it comprises freezing room, cold room and a soft freezing room, and a space sensor is set in the soft freezing room, and is positioned on the side wall of the soft freezing room.

The evaporator of the soft freezing chamber is arranged in the rear wall of the soft freezing chamber, a space sensor is arranged on the side wall of the soft freezing chamber, and cold storage boxes are arranged at the bottom and the top, and cold storage materials are filled in the cold storage boxes; or the evaporator of the soft freezing chamber Set in the rear and one side wall of the soft freezer, set a space sensor on the other side wall, set cold storage boxes at the bottom and top of the soft freezer, and fill the cold storage boxes with cold storage substances; or set the evaporator of the soft freezer At the rear, one side wall and the bottom of the soft freezer, a space sensor is arranged on the other side wall, and a cold storage box is arranged on the top of the soft freezer, and the cold storage box is filled with cold storage material; the evaporator of the soft freezer can also be arranged on A space sensor is arranged on the rear, one side wall and the top of the soft freezing chamber, and the other side wall is arranged, and a cold storage box is arranged at the bottom of the soft freezing chamber, and the cold storage box is filled with cold storage substances. The purpose of this design is to increase the evaporation area of the evaporator in the soft freezer and speed up the cooling speed. Second, the space sensor is far away from the evaporator, so that it can accurately sense the change of the air temperature in the soft freezer and realize the rapid freezing of food.

The position of the temperature sensor of the existing refrigerator is generally located on the rear wall of each chamber, close to the evaporator of the refrigeration circuit. Since the temperature sensor senses the temperature near the evaporator, and the temperature near the evaporator is usually lower than the temperature of other parts in the freezer, so when the temperature of the food has not yet reached the temperature to be frozen, the temperature near the evaporator may have reached Set the temperature, the freezing process will stop at this time, and only when the temperature near the evaporator rises again, the freezing process will continue. Therefore, when the food is newly put into the refrigerator, the freezing process is intermittent, and gradually reaches the freezing point. In this way, it takes a long time for food to pass through the maximum ice crystal formation zone (-1--5°C) during the freezing process, especially in the soft freezer, the temperature setting is generally -5--9°C, which is just above the temperature of the ice crystal zone , so this intermittent freezing method makes it take longer to pass through the ice crystal formation zone, causing greater damage to food nutrition. The present invention adds a space sensor in the soft freezing chamber on the basis of retaining the original temperature control device. The function of the space sensor is also to sense the temperature change in the freezing chamber. Because its position is far away from the evaporator, it can sense the temperature change in the room more accurately. , more sensitive, when the food is newly put into the freezer, due to its relatively high temperature, the temperature of the freezer, especially the surrounding air, will rise. The space sensor will first sense this temperature change and start the refrigerator to cool. Refrigeration will not stop until the set temperature is reached. This process is also called deep freezing, so that the temperature of the food quickly passes through the maximum ice crystal formation zone, reducing the damage to the nutritional content of the food.

In order to further optimize the position of the space sensor and improve the quick freezing effect, the present invention fully considers the air flow field and temperature distribution in the soft freezing chamber. The temperature distribution in each room of the refrigerator, including the soft freezer room, is uneven. Generally speaking, the temperature near the evaporator is usually lower than the temperature in other parts of the room; due to the large proportion of cold air, it is easy to sink, and hot air rises. Therefore, the temperature of the lower part of the compartment is generally lower than that of the upper part; since the door of the refrigerator is often opened and closed, and the sealing strip on the side of the door always exchanges heat with the outside world, the temperature of the air near the door is generally higher than that of the interior of the compartment. ; In addition, because there are cold storage blocks on the top or bottom of the freezer and soft freezer, these factors cause the temperature distribution of the indoor air in the refrigerator to be extremely complicated. The designer of the present invention comprehensively considers the above factors, and finds that the space sensor is arranged on the side wall of the side of the soft freezing chamber where the evaporator is not provided, and its position interval is: the height is 2 times the height of the side wall. /3-3/4, the distance from the door is less than or equal to 1/4 of the width of the side wall. In this area, hot air is most likely to accumulate, so the space sensor is arranged on the side wall. In this area, the effect of deep freezing is the best.

Since the space sensor is located on the side wall of the freezer, newly put food can be conveniently placed near the space sensor, so that deep freezing is faster and more thorough.

In order to ensure precise control of the temperature of each compartment of the refrigerator, the freezing system of the present invention adopts a separate double-circulation technology. The evaporator of the cold storage room is connected in parallel with the evaporator of the soft freezing room, and one end thereof is connected with the condenser and the compressor through a solenoid valve. , the other end is connected in series with the evaporator and compressor of the freezer to form two independent refrigeration loops, namely, the refrigeration loop of the refrigerator compartment and the refrigeration loop of the soft freezer compartment. The refrigeration loop of the refrigerator compartment is composed of a compressor, a condenser, a dry filter The compressor, solenoid valve, capillary tube, refrigerating room evaporator and freezing room evaporator return to the compressor; the soft freezing room refrigeration circuit consists of compressor, condenser, dry filter, solenoid valve, capillary tube, soft freezing room evaporator and freezing room The evaporator goes back to the compressor. Such a design prevents the refrigeration process of the refrigerator and the soft freezer from interfering with each other, and truly achieves precise temperature control. The soft freezer can be refrigerated separately, and can be automatically quick-frozen according to the temperature of the soft freezer to preserve freshness and quality.

In order to ensure the deep freezing effect of the soft freezer, the refrigeration system of the present invention always meets the control requirements of the soft freezer first, and this purpose is realized by controlling the working state of the electromagnetic valve through the space sensor in the soft freezer. The space sensor transmits the temperature signal to the control device of the refrigerator, and the control device switches the solenoid valve according to the set value. The temperature setting value of the soft freezer has a range, which is -5-9°C. Normally, when the temperature of the soft freezer is within this interval, the solenoid valve closes the refrigeration circuit of the soft freezer and opens the refrigeration circuit of the refrigerator, and at the same time, the space sensor in the soft freezer detects the temperature of the soft freezer. When it is detected that the temperature of the soft freezer is higher than the upper limit of the set temperature value, that is, the starting point, the solenoid valve opens the refrigeration circuit of the soft freezer, and the refrigeration system refrigerates the soft freezer. When the space sensor detects that the temperature is lower than the lower limit of the set temperature value, that is, the shutdown point, the system closes the refrigeration circuit of the soft freezer. When the temperature of each chamber reaches the set standard, the compressor stops, and the cycle repeats.

When the food is newly placed in the freezer, due to its relatively high temperature, the temperature of the soft freezer, especially the surrounding air, will rise, and the space sensor will sense this temperature change before the original temperature sensor, thereby immediately starting the refrigerator to refrigerate , and before the air temperature reaches the lower limit of the set temperature, that is, the shutdown point, the refrigeration will not stop, so that the food temperature can quickly pass through the maximum ice crystal formation zone, reducing the damage to food nutrients.

Since the space sensor is located on the side wall of the soft freezer, the newly placed food can be conveniently placed near the space sensor, making it easier for the space sensor to perceive the temperature change in the soft freezer after the new food is placed, so that deep freezing is more accurate and more efficient. thorough.

By adopting the utility model, the temperature of the soft freezing compartment can be adjusted to any temperature between -5--25°C as required, and can also be adjusted to be consistent with the temperature of the freezing compartment to be used as a freezing compartment. The utility model adds a space sensor in the freezing room and the soft freezing room, which can deeply freeze the newly put food, and avoid the destruction of the nutrition of the food by the gradual freezing.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the principle of the refrigeration system of the present invention.

Detailed ways

The embodiment of the utility model is suitable for direct cooling refrigerators. Accompanying drawing 1 is the structural diagram of an embodiment of the present utility model, and it comprises freezing room 12, cold room 11 and soft freezing room 13, and the temperature of freezing room is-18 ℃, and the temperature of cold room remains on 0～10 ℃, The temperature of the soft freezer is maintained at about -9°C to -5°C; the freezer 12 is on the bottom, the freezer 11 is on the top, the soft freezer 13 is in the middle, and the evaporator 31 of the freezer is installed on the top of the freezer. The device 32 is installed in the backboard of the refrigerator, and the evaporator 33 of the soft freezer is arranged on the top and one side wall of the soft freezer, at the bottom of the soft freezer, that is, on the partition between the soft freezer and the freezer Cold storage box 7 is set, and cold storage material is filled in the cold storage box 7, and cold storage material can be salt water, calcium chloride water etc.; A space sensor 8 is arranged on the side wall of the soft freezing chamber; compressor 1, capillary tube, electromagnetic valve of the refrigerator 6, etc. are installed at the bottom of the refrigerator or in the insulation layer of the box body.

The evaporator 31 of the refrigerating chamber is connected in parallel with the evaporator 33 of the soft freezing chamber, one end of which is connected with the condenser 2 and the compressor 1 through a solenoid valve 6, and the other end is connected in series with the evaporator 32 of the freezing chamber and the compressor 1 to form two refrigeration circuit.

The operating state of electromagnetic valve 6 is controlled by the space sensor in the soft freezing chamber. The space sensor transmits the temperature signal to the control device of the refrigerator, and the control device switches the solenoid valve according to the set value. When starting up for the first time, the two circuits are refrigerated at the same time, the two circuits of solenoid valve 6 are all opened, and one circuit is compressor 1, condenser 2, dry filter 4, solenoid valve 6, capillary tube 51, refrigerating chamber evaporator 31 and freezing chamber evaporator 32 returns to compressor 1; the other route returns to compressor 1 through compressor 1, condenser 2, dry filter 4, solenoid valve 6, capillary 53, soft freezer evaporator 33 and freezer evaporator 32.

When the temperature of the freezing chamber increased, the electromagnetic valve 6 opened the refrigeration circuit of the freezing chamber and closed the refrigeration circuit of the soft freezing chamber, while the space sensor in the soft freezing chamber detected the temperature of the soft freezing chamber.

In this embodiment, the temperature range of the soft freezer is set at -5--9°C. When the space sensor detects that the temperature of the soft freezer is higher than the upper limit of the set temperature value, the solenoid valve 6 opens the refrigeration circuit of the soft freezer and closes the refrigeration circuit of the refrigerator. The opened refrigeration circuit is composed of compressor 1, condenser 2, drying Filter 4, solenoid valve 6, capillary 53, soft freezer evaporator 33 and freezer evaporator 32 return to compressor 1. When the temperature of the soft freezer drops, the cold storage box in the soft freezer stores cold at the same time. When the temperature of the freezer reaches the specified value, the compressor stops cooling, and the cold storage box releases the cooling capacity, so that the soft freezer remains at -9℃～- 5°C to ensure stable soft freezing performance. When the space sensor detects that the temperature is lower than the lower limit of the set temperature value, the system closes the refrigeration circuit of the soft freezer. When the temperature of each chamber reaches the set standard, the compressor stops, and the cycle repeats.

When the food is newly placed in the freezer, due to its relatively high temperature, the temperature of the soft freezer, especially the surrounding air, will rise, and the space sensor will sense this temperature change before the original temperature sensor, thereby immediately starting the refrigerator to refrigerate , and before the air temperature reaches the lower limit of the set temperature, which is -9°C, the refrigeration will not stop, so that the food temperature will quickly pass through the maximum ice crystal formation zone, reducing the damage to food nutrients. Since the space sensor is located on the side wall of the soft freezer, the newly placed food can be conveniently placed near the space sensor, making it easier for the space sensor to perceive the temperature change in the soft freezer after the new food is placed, so that deep freezing is more accurate and more efficient. thorough.

The utility model can also adjust the temperature of the soft freezer to be consistent with the temperature of the freezer through a temperature controller, that is, -18° C., and use it as a freezer.

Similarly, the same space sensor can also be installed in the freezer, and its working principle and effect are the same as those installed in the soft freezer.

Claims (7)

1, a kind of refrigerator, it comprises refrigerating chamber, refrigerating chamber and soft freezing chamber, and the refrigerating circuit of being made up of compressor, condenser, magnetic valve, capillary, evaporimeter etc., it is characterized in that: the soft freezing chamber madial wall is provided with an airborne sensor.

2, refrigerator according to claim 1 is characterized in that: the described airborne sensor that is positioned on the soft freezing chamber madial wall between its lane place is: highly be the 2/3-3/4 of this sidewall height, distance from the doorway be less than or equal to wall wide 1/4.

3, refrigerator according to claim 1 and 2, it is characterized in that: the evaporimeter of refrigerating chamber and the evaporimeter of soft freezing chamber are in parallel, the one end links to each other with condenser, compressor by magnetic valve, and the other end is connected with the evaporimeter and the compressor of refrigerating chamber, forms refrigerant circuit.

4, refrigerator according to claim 1 and 2 is characterized in that the evaporimeter of soft freezing chamber is arranged in the rear wall of soft freezing chamber, on the sidewall of soft freezing chamber airborne sensor is set, and bottom and top are provided with cold storage box, fills the cold-storage material in the cold storage box.

5, refrigerator according to claim 1 and 2, the evaporimeter that it is characterized in that soft freezing chamber is arranged in the rear portion and a sidewall of soft freezing chamber, on another sidewall airborne sensor is set, the bottom and the top of soft freezing chamber are provided with cold storage box, fill the cold-storage material in the cold storage box.

6, refrigerator according to claim 1 and 2, it is characterized in that the evaporimeter of soft freezing chamber is arranged on the rear portion of soft freezing chamber, a sidewall and bottom, on another sidewall airborne sensor is set, the top of soft freezing chamber is provided with cold storage box, fills the cold-storage material in the cold storage box.

7, refrigerator according to claim 1 and 2, it is characterized in that the evaporimeter of soft freezing chamber is arranged on the rear portion of soft freezing chamber, a sidewall and top, on another sidewall airborne sensor is set, the bottom of soft freezing chamber is provided with cold storage box, fills the cold-storage material in the cold storage box.

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