WO2015180438A1 - Refrigerator - Google Patents

Abstract

A refrigerator. When the air flow entering a refrigeration compartment (1) from a second sub-trunk (53) branched from a main trunk (51) for circulating cold air is reduced, the absolute humidity of air in a cooling chamber (4) where an evaporator (3) is located is decreased, and thus the air flow around the evaporator (3) is reduced, so that the absolute humidity of air entering a drying chamber (2) is decreased, and a better dehumidifying effect is achieved.

Description

Refrigerator

The present application claims priority to Chinese Patent Application No. 2014-1023676, the entire disclosure of which is hereby incorporated by reference.

[Technical Field]

The invention relates to a refrigerator with a dry matter room, belonging to the field of household appliances.

 【Background technique】

Humidity generally refers to air humidity in meteorology, which is the content of water vapor in the air, and does not contain liquid or solid water. Air without water vapor is called dry air. Since the water vapor in the atmosphere can account for 0% to 4% of the volume of the air, it is generally referred to as the composition of the components in the dry air when the components of the various gases in the air are listed.

"Absolute humidity" refers to the mass of water vapor contained in a volume of air, typically in grams per cubic meter. The maximum absolute humidity is the highest humidity in saturation.

"Relative Humidity" (RH) is the ratio between absolute humidity and maximum humidity, and its value indicates how high the saturation of water vapor is. Air with a relative humidity of 100% is saturated air. The relative humidity is 50% of the air containing half of the water vapor reaching the saturation point of the air at the same temperature. Water vapor in the air having a relative humidity of more than 100% generally condenses water or ice. As the temperature increases, the amount of water vapor that can be dissolved in the air increases, and the absolute humidity of the air increases. When the relative humidity of the air exceeds 100%, the water vapor in the air will condense, which can be used to cool down and dehumidify; then the temperature will rise and the relative humidity will decrease, which can be used for drying purposes.

The drying of food is mainly related to relative humidity. The relative humidity is low and the food is less likely to get moisture.

A storage room with low relative humidity developed in the refrigerator can be used to store various dry foods or foods that need to be dried (such as tea leaves, dried fruits, etc.). Dry foods are sensitive to the relative humidity of the storage environment, usually require a relatively low relative humidity, and can be kept within a relatively small range of relative humidity changes, otherwise it can easily lead to deterioration of food or affect quality.

The traditional way to reduce the relative humidity of the compartment is to use the principle of cooling and dehumidification, that is, using the cooling function of the evaporator, the air in the compartment is cooled down sufficiently by the evaporator, and the water vapor is dehumidified to obtain the air with lower absolute moisture content, and then Replace the air with a high absolute moisture content in the room (ie, the air with a higher absolute moisture content in the room is driven out, and the absolute moisture content in the room is reduced), and then the temperature is raised by the heating of the surrounding environment. In order to achieve a lower relative humidity and achieve the purpose of drying.

 [Summary of the Invention]

It is an object of the present invention to provide a refrigerator having a dry matter chamber which can provide an air having a smaller absolute moisture content to the dry matter chamber for a better dehumidification effect.

In order to achieve the foregoing object, the present invention adopts the following technical solution: a refrigerator having a dry room, a refrigerating compartment, and a cooling chamber in which an evaporator is arranged, and the cooling chamber is connected to the dry room and the refrigerating compartment through a cold passage. The cold flow passage includes a main road connected to the cooling chamber and a fork on the autonomous main road formed to respectively connect the dry matter chamber, the first branch road of the cooling chamber, and the second branch road, when the second branch road The flow of air entering the cooling compartment from the cooling chamber is reduced, and the absolute humidity of the air in the cooling chamber is lowered.

As a further improvement of the present invention, the flow rate of air entering the refrigerating compartment from the cooling compartment in the second partial trunk is reduced by reducing the ratio of the opening and closing time of the second partial trunk.

As a further improvement of the present invention, a damper is disposed in the second branch road, and the opening and closing time of the second branch road is determined by a ratio of opening and closing time of the damper.

As a further improvement of the present invention, the flow of air from the cooling chamber into the refrigerating compartment in the second partial pass is reduced by reducing the air flow cross-sectional area of the second partial pass.

As a further improvement of the present invention, one side of the second branch road is provided with a damper, and the damper is movable or rotated relative to the second branch road to control the size of the air circulation cross section of the second branch road to change the The flow of air in the secondary road.

As a further improvement of the present invention, one side of the evaporator is provided with a fan, and the air flow rate from the cooling chamber to the refrigerating compartment in the second partial trunk is reduced by reducing the rotational speed of the fan.

As a further improvement of the present invention, the first aspect is reduced by reducing the opening/closing time ratio of the second partial trunk, reducing the air circulation cross-sectional area of the second partial trunk, and reducing any two or more combinations of the fan rotational speeds. The air flow from the cooling chamber to the refrigerating compartment in the two-way main road.

As a further improvement of the present invention, the refrigerating compartment is a combination of any one or more of a refrigerating compartment, a freezing compartment, and a temperature changing compartment.

The beneficial effects of the present invention are: when the flow rate of air entering the cooling compartment from the cooling chamber in the second partial road is reduced, the absolute humidity of the air in the cooling chamber is lowered, thereby reducing the air flow around the evaporator, so as to enter The absolute moisture content of the air in the dry matter room is smaller, achieving a better dehumidification effect.

 [Description of the Drawings]

1 is a partial structural view of a refrigerator in a specific embodiment of the present invention.

Figure 2 is a graph showing relative humidity versus time at different ratios of opening and closing times of the second partial trunk.

Figure 3 is a graph showing relative humidity versus time for air flow in different second partial roads.

Figure 4 is a graph showing relative humidity versus time at different fan speeds.

 【detailed description】

Referring to FIG. 1, a refrigerator in an embodiment of the present invention has a refrigerating compartment 1, a freezing compartment, a variable greenhouse, and a refrigeration cycle system. The refrigerating compartment 1, the freezing compartment and the variable greenhouse are collectively referred to as a refrigerating compartment. The refrigerating compartment 1 is provided with a dry matter chamber 2, wherein the standard temperature in the refrigerating compartment 1 is 0-10°, generally 6-8°; the temperature in the dryroom 2 is lower than that in the refrigerating compartment 1 The temperature inside is generally 3~5°. The refrigeration cycle system includes a condenser, a compressor, an evaporator 3, and a capillary tube, and the refrigeration cycle system is the same as the existing refrigeration cycle system, and thus will not be described in detail. The evaporator 3 is disposed in a cooling chamber 4, and the dry chamber 2 is connected to the cooling chamber 4 and the refrigerating compartment 1 through a cooling passage 5, and the cooling passage 5 includes a main road 51 connected to the cooling chamber 4 and The autonomous main road 51 is bifurcated to connect the dry matter chamber 2, the first branch road 52 of the refrigerating compartment 1, and the second branch road 53. One side of the evaporator 3 is provided with a fan 6 for introducing air in the cooling chamber 4 into the refrigerating compartment 1 and the dry chamber 2, and in the present embodiment, the fan 6 is disposed in the cooling chamber 4. The first damper 71 is movable or rotated relative to the first branching passage 52 to control the size of the air flow cross section of the first branching passage 52 to change the flow rate of the air in the first branching passage 52, the second damper 72 can be moved or rotated relative to the second branch road 53 to control the size of the air flow cross section of the second branch passage 53 to change the flow rate of the air in the second branch passage 53 to realize the cooling chamber 4 and the dry chamber 2, respectively. The air in the refrigerating compartment 1 is replaced. A humidity detector for detecting the humidity in the dry matter chamber 2 is disposed in the dry matter chamber 2.

When the flow rate of air entering the refrigerating compartment 1 from the cooling chamber 2 in the second branching passage 53 is lowered, the absolute humidity of the air in the cooling chamber 4 is lowered. Since the flow rate of the air passing through the cooling chamber 4 into the refrigerating compartment 1 in the second branch passage 53 is reduced, the flow of air around the evaporator 3 is reduced, and the air is sufficiently cooled on the evaporator 3 in the cooling chamber 4. In order to sufficiently cool the air in the cooling chamber 4, when the air is sufficiently cooled until reaching the dew point temperature of the air in the cooling chamber 4, the water vapor condenses into liquid water, and when the air passes through the evaporator 3, the temperature is sufficiently lowered. The air can reach a lower absolute humidity, so that the absolute moisture content of the replacement air entering the dry matter chamber 2 is smaller, achieving a better dehumidification effect.

When the dry room 2 is opened, the opening frequency of the first branch road 52 is as follows:

S1: setting a preset relative humidity value RH1 of the dry matter chamber 2;

S2: detecting the relative humidity in the dry matter chamber 2 by the humidity sensor to obtain the detected relative humidity value RH2;

S3: Align the detected relative humidity value RH2 with the preset relative humidity value RH1 to obtain the opening frequency of the first partial trunk 52. The relationship between the detected relative humidity value RH2 and the preset relative humidity value RH1 is compared with the opening frequency of the first branch road 52 as follows: when the relative humidity of the dry matter chamber 4 is higher, the second damper 71 of the second branch road 52 is The opening/closing time ratio (the ratio of the opening and closing time of the second damper 71 is the ratio of the opening and closing time of the second branching passage 52) is reduced to obtain air of a lower absolute humidity.

In the present embodiment, in order to achieve a reduction in the flow rate of air entering the refrigerating compartment 1 from the cooling chamber 4 in the second branching passage 53, the combination of one or more of the following three ways may be employed.

The first mode is to reduce the flow rate of air entering the refrigerating compartment 1 from the cooling chamber 4 in the second branching passage 53 by reducing the opening/closing time ratio of the second branching passage 53.

Referring to FIG. 2, the opening and closing time ratio of the second branching passage 53 forming the curve 1 is greater than the opening and closing time ratio of the second branching passage 53 forming the curve 2. As can be seen from FIG. 2, the curve 2 reflects The dehumidification effect is superior to the dehumidification effect of curve 1.

The second mode is to reduce the flow rate of air entering the refrigerating compartment 1 from the cooling chamber 4 in the second branching passage 53 by reducing the air flow cross-sectional area of the second branching passage 53.

Referring to FIG. 3, the air flow cross-sectional area of the second branch road 53 forming the curve 1 is larger than the air flow cross-sectional area of the second branch road 53 forming the curve 2. As can be seen from FIG. 3, the curve 2 reflects The dehumidification effect is superior to the dehumidification effect of curve 1.

In the third mode, the air flow rate from the cooling chamber 4 to the refrigerating compartment 1 in the second branching passage 53 is reduced by reducing the rotation speed of the fan 6.

Referring to FIG. 4, the rotation speed of the fan 6 forming the curve 1 is greater than the rotation speed of the fan 6 forming the curve 2. As can be seen from FIG. 4, the dehumidification effect reflected by the curve 2 is better than the dehumidification effect of the curve 1.

In the above embodiment, the cooling passage 5 is disposed between the cooling chamber and the dry chamber and the refrigerating chamber 1, and the fan 6 is disposed at one side of the evaporator 3. Indeed, in other embodiments, The cooling passage 5 is disposed between the cooling chamber 4 and the dry chamber 2 and the other refrigerating compartments, and the fan 6 is also disposed in the evaporator 3, at which time the first sub-main road 52 is connected to the main road 51 and the dry chamber 2, and second The branch road 53 connects the main road 51 and other refrigerating compartments. If the other refrigerating compartment is a freezing compartment, since the temperature required in the freezing compartment is lower than that of the refrigerating compartment 1, the cooling passage 5 is disposed between the cooling compartment 4 and the dry compartment 2 and the refrigerating compartment 1 The dry room 2 will be able to achieve a lower relative humidity.

In summary, when the flow rate of air entering the refrigerating compartment 1 from the cooling chamber 4 in the second branching passage 53 is lowered, the absolute humidity of the air in the cooling chamber 4 is lowered, thereby reducing the air around the evaporator 3. The flow rate makes the absolute moisture content of the replacement air entering the dry matter chamber 2 smaller, achieving a better dehumidification effect.

While the preferred embodiment of the present invention has been disclosed by way of example the embodiments of the invention Improvements, additions and substitutions are possible.

Claims (8)

1. A refrigerator having a dry matter chamber, a refrigerating compartment, and a cooling chamber in which an evaporator is arranged, the cooling chamber being connected to the dry chamber and the refrigerating compartment through a cold passage, the cold passage including the cooling chamber The main road and the autonomous trunk road are branched to form a first branch road and a second branch road respectively connecting the dry room and the cooling room, and are characterized in that: when the second branch road passes from the cooling room to the cooling room The air flow rate is reduced, and the absolute humidity of the air in the cooling room is lowered.
2. The refrigerator according to claim 1, wherein a flow rate of air entering the cooling compartment from the cooling chamber to the refrigerating compartment is reduced by reducing an opening/closing time ratio of the second branching passage.
3. The refrigerator according to claim 2, wherein a damper is disposed in the second branch road, and an opening and closing time of the second branch road is determined by a ratio of opening and closing times of the damper.
4. The refrigerator according to claim 1, wherein the flow rate of air entering the cooling compartment from the cooling compartment to the refrigerating compartment is reduced by reducing the air flow cross-sectional area of the second partial trunk.
5. The refrigerator according to claim 4, wherein one side of the second branch road is provided with a damper, and the damper is movable or rotated relative to the second branch road to control air circulation of the second branch road The cross-section is sized to vary the flow of air within the second partial pass.
6. The refrigerator according to claim 1, wherein a side of the evaporator is provided with a fan, and a flow rate of air entering the cooling compartment from the cooling chamber to the refrigerating compartment is reduced by reducing the rotation speed of the fan.
7. The refrigerator according to claim 1, wherein any two or more combinations of reducing the opening and closing time ratio of the second branch road, reducing the air flow cross-sectional area of the second branch road, and reducing the fan speed are adopted. The way to reduce the flow of air from the cooling chamber into the refrigerating compartment in the second partial road.
8. The refrigerator according to claim 1, wherein the refrigerating compartment is a combination of any one or more of a refrigerating compartment, a freezing compartment, and a temperature changing compartment.