CN113915888B

CN113915888B - Refrigerator and air circulation method

Info

Publication number: CN113915888B
Application number: CN202110428446.4A
Authority: CN
Inventors: 彭洪祥; 刘洋; 韩立利
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2023-08-18
Anticipated expiration: 2041-04-21
Also published as: CN113915888A

Abstract

The application relates to the technical field of refrigerators and discloses a refrigerator and an air circulation method, wherein the refrigerator comprises a refrigerator body and a refrigerating system, the refrigerator body is provided with a refrigerating chamber, a temperature changing chamber, a fruit and vegetable chamber and a first air return opening, and the refrigerating chamber is provided with a refrigerating air inlet communicated with the refrigerating system; the temperature-changing chamber is provided with a temperature-changing air inlet connected with the refrigerating system; the fruit and vegetable chamber is provided with a fruit and vegetable chamber air inlet; the air return port of the temperature changing chamber is connected with the first air return port, the air return port of the temperature changing chamber enters the first air return port after passing through the refrigerating chamber, and the first air return port is communicated with the air inlet of the fruit and vegetable chamber; part of cold air circulates to the first air return opening through the refrigerating chamber, part of cold air circulates to the first air return opening through the temperature changing chamber and the refrigerating chamber to form mixed cold air, and the mixed cold air enters the fruit and vegetable chamber. By adopting the wind circulation method of the technical scheme of the application, even if the temperature of the temperature-changing drawer is lower, the temperature of the fruit and vegetable room is not low, an additional heating device is not needed, and the energy consumption is reduced.

Description

Refrigerator and air circulation method

Technical Field

The application relates to the technical field of refrigerators, in particular to a refrigerator and a wind circulation method.

Background

The fruit and vegetable room, also called wild vegetable room, is used for placing vegetables/fruits, the characteristic temperature is 12 ℃, because the wild vegetable room is used frequently, the wild vegetable room is generally designed to be larger, and is a room alone, and in order to facilitate the user to take food, the optimal layout position of the wild vegetable room is in the middle, the refrigerating room is on the upper part, and the refrigerating room is on the lower part; because the upper part of the wild vegetable compartment is refrigerated and the lower part is frozen, the back freezing air duct is low in temperature, and the temperature of the wild vegetable is easy to be lower; the above problems become more serious in the case of a refrigerated drawer with ice temperature at the bottom; the wild vegetable has low temperature and needs to be compensated by heating to prevent the vegetables from being frostbitten, but the power consumption is greatly increased.

At present, as shown in fig. 1, the existing refrigerating chamber 1 and the temperature changing drawer 2 are respectively provided with an air door, the temperatures of the refrigerating chamber 1 and the temperature changing drawer 2 are respectively controlled, and as the wild vegetable chamber 3 is not provided with an independent air supply duct, an independent air return duct and an independent temperature controlling air door, the air return of the refrigerating chamber 1 or the temperature changing drawer 2 directly enters the wild vegetable chamber 3 from the bottom of the refrigerating chamber 1, and then returns air from the wild vegetable chamber 3 to the bottom of a freezing evaporator arranged in the freezing chamber 4; namely: (refrigeration/temperature-changing drawer) -wild vegetable chamber-freezing chamber, refrigerating return air firstly passes through wild vegetable and then is frozen; the above design results in the following disadvantages:

(1) The temperature of the wild vegetable chamber changes along with the temperature change of the refrigerating chamber and the temperature change drawer;

(2) If the temperature of the temperature changing drawer is low, when the temperature changing drawer is used for refrigerating, the temperature of the return air passing through the wild vegetable room is low, and the temperature of the wild vegetable is possibly lower than 0 ℃, so that vegetables are frostbitten;

one of the prior solutions is that a heating device is added in a wild vegetable room, when the temperature of the wild vegetable is lower than a certain temperature, heating is started to avoid frostbite of food, but the energy consumption is additionally increased;

another common solution is that the potherb room is provided with an air supply/return duct and a temperature control damper separately, and the return air of the refrigeration/temperature change drawer no longer passes through the potherb room, namely: the temperature of the refrigeration/temperature-changing drawer/potherb chamber is independently controlled, and the scheme has higher cost.

Therefore, the wind circulation method capable of preventing the indoor temperature of fruits and vegetables from being too low is continued on the premise of low cost and energy conservation.

Disclosure of Invention

The purpose of the application is that: the refrigerator and the air circulation method have the advantages that even if the temperature of the temperature changing drawer is low, the temperature of the fruit and vegetable room is not low, an air inlet heating device for wild vegetables is not required to be added, the energy consumption can be reduced, and the cost is low.

In order to achieve the above object, the present application provides a refrigerator, including a cabinet and a refrigerating system disposed at a rear side of the cabinet for generating circulating cool air;

the box body is internally provided with a refrigerating chamber, a temperature changing chamber and a fruit and vegetable chamber,

the back side of the refrigerating chamber is provided with a refrigerating air inlet communicated with the refrigerating system, the refrigerating air inlet is arranged at the upper part of the refrigerating chamber, and the back side of the refrigerating chamber is also provided with a first air return opening;

the temperature changing chamber is arranged in the refrigerating chamber, the rear side of the temperature changing chamber is provided with a temperature changing air inlet connected with the refrigerating system, and the first air return inlet is positioned above the temperature changing chamber;

the fruit and vegetable chamber is provided with a fruit and vegetable chamber air inlet which is communicated with the first air return opening through an air duct;

when the refrigerator operates, part of cold air discharged by the refrigerating system circulates to the first air return opening through the refrigerating chamber, and part of cold air circulates to the first air return opening after passing through the temperature changing chamber and the refrigerating chamber, wherein the cold air of the first air return opening enters the fruit and vegetable chamber, and the air inlet temperature of the fruit and vegetable chamber is higher than 1.5 ℃.

In some embodiments of the application, the distance between the first return air inlet and the temperature change chamber is not less than 10cm.

In some embodiments of the present application, the refrigerator further includes a controller, the cold storage air inlet is provided with a cold storage air door, the temperature change air inlet is provided with a temperature change air door, the cold storage air door, the temperature change air door and the refrigeration system are all electrically connected with the controller, and the controller is used for:

when the temperature in the refrigerating chamber is higher than a preset refrigerating temperature, opening the refrigerating air door, and operating the refrigerating system;

when the temperature in the temperature changing chamber is higher than the preset temperature changing temperature, the temperature changing air door is opened, and the refrigerating system operates.

In some embodiments of the application, the temperature in the temperature change chamber is maintained between-3 ℃ and +3 ℃ when the refrigerator is in operation.

In some embodiments of the present application, the refrigeration system includes an evaporator, a compressor, and a fan, the evaporator is configured to cool a gas to form a cool gas; the compressor is used for providing power for the circulation of the cold air; the fan is used for conveying cool air to the refrigerating chamber or the temperature changing chamber;

the evaporator, the compressor and the fan are all electrically connected with the controller, when the temperature in the refrigerating chamber is higher than the preset refrigerating temperature, the controller opens the refrigerating air door, and the controller starts the evaporator, the fan and the compressor;

when the temperature in the temperature changing chamber is larger than the preset temperature changing temperature, the controller starts the temperature changing air door, and the controller starts the evaporator, the fan and the compressor.

In some embodiments of the application, the temperature changing chamber comprises a temperature changing drawer and a temperature changing cover plate, wherein the temperature changing drawer is arranged on the bottom wall of the refrigerating chamber, and the temperature changing air inlet is arranged on the rear side of the temperature changing drawer; the temperature changing cover plate is covered on the top of the temperature changing drawer and is made of heat insulation materials.

In some embodiments of the application, the temperature swing chamber further comprises a temperature swing front cover rotatably connected to the front side of the temperature swing cover plate, the temperature swing front cover being capable of rotating to open or cover the front side of the temperature swing drawer.

In some embodiments of the application, a gap for exhausting gas in the temperature change drawer is reserved between the temperature change front cover and the temperature change drawer.

In some embodiments of the present application, the fruit and vegetable chamber air inlet is located on the rear wall of the fruit and vegetable chamber, and the fruit and vegetable chamber air inlet is located on the upper portion of the fruit and vegetable chamber, and a second air return port is further located on the rear wall of the fruit and vegetable chamber, and is located on the lower portion of the fruit and vegetable chamber, and the second air return port is connected with the air inlet end of the evaporator.

Based on the same object, the application also provides a wind circulation method, which comprises the following steps:

the refrigeration system generates circulating cool air;

part of circulating cold air enters the refrigerating chamber to form refrigerating return air after refrigeration is completed;

part of cold air enters a temperature changing chamber to form temperature changing return air after refrigeration is completed;

after entering the refrigerating chamber, the variable-temperature return air is mixed with the refrigerating return air to form medium-temperature gas with the temperature not lower than 1.5 ℃ to enter the fruit and vegetable chamber, and the high-temperature gas after heat exchange in the fruit and vegetable chamber is conveyed to a refrigerating system for refrigerating circulation.

Compared with the prior art, the refrigerator and the air circulation method have the beneficial effects that:

according to the refrigerator and the air circulation method, the variable-temperature chamber is arranged in the refrigerating chamber, variable-temperature return air discharged from the variable-temperature chamber enters the first air return opening after passing through the refrigerating chamber, and the variable-temperature return air is lower than the temperature in the refrigerating chamber, so that the variable-temperature return air discharged from the variable-temperature chamber exchanges heat again in the refrigerating chamber, the temperature of air discharged to the fruit and vegetable chamber through the first air return opening is not lower than 1.5 ℃, the problem that food materials in the fruit and vegetable chamber are frostbitten due to the fact that the temperature of the variable-temperature drawer is too low when the variable-temperature drawer returns air directly into the fruit and vegetable chamber in the prior art is avoided, and the problem that energy loss is caused by heating the return air by the heating device is avoided; further, the variable-temperature return air exhausted by the variable-temperature chamber participates in the cooling of the refrigerating chamber, so that the cold quantity of the variable-temperature return air of the variable-temperature chamber is utilized, and energy is saved; in addition, because the first return air inlet is located the top of temperature changing room, because cold air can the downward movement, so temperature changing room exhaust temperature changing return air can sink to the cold closet bottom to avoid temperature changing return air of temperature changing room direct via first return air inlet exhaust problem, further ensure can not take place the indoor food frostbite of fruit vegetable problem.

Drawings

Fig. 1 is a schematic structural view of a related art refrigerator;

fig. 2 is a schematic view of a refrigerator according to an embodiment of the present application;

FIG. 3 is a schematic view of a temperature change chamber according to an embodiment of the present application;

in fig. 1, a refrigerating chamber, 2, a temperature changing drawer, 3, a potherb chamber, 4, a freezing chamber,

in fig. 2 and 3, 100, a refrigerating chamber, 200, a temperature changing chamber, 210, a temperature changing air inlet, 220, a temperature changing drawer, 221, a handle, 230, a temperature changing cover plate, 240, a temperature changing front cover, 300, a fruit and vegetable chamber, 400, a freezing chamber, 500, a refrigerating air inlet, 600, a first air return opening, 700, a fruit and vegetable chamber air inlet, 800, a second air return opening, 900 and an air inlet end of an evaporator.

Detailed Description

The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application is further explained and illustrated below with reference to the drawing and the specific embodiments of the present specification. The step numbers in the embodiments of the present application are set for convenience of illustration, and the order of steps is not limited in any way, and the execution order of the steps in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

As shown in fig. 2 to 3, a refrigerator according to a preferred embodiment of the present application includes a cabinet and a refrigerating system disposed at a rear side of the cabinet for generating circulated cool air;

the refrigerator body is provided with a refrigerating chamber 100, a temperature changing chamber 200 and a fruit and vegetable chamber 300,

the rear side of the refrigerating chamber 100 is provided with a refrigerating air inlet 500 communicated with a refrigerating system, the refrigerating air inlet 500 is arranged at the upper part of the refrigerating chamber 100, cold air enters the refrigerating chamber 100 and then moves downwards from the top of the refrigerating chamber 100 through the arrangement of the refrigerating air inlet 500 at the upper part of the refrigerating chamber 100, the temperature in the refrigerating chamber 100 is uniformly cooled, and the rear side of the refrigerating chamber 100 is also provided with a first air return port 600;

the temperature changing chamber 200 is arranged in the refrigerating chamber 100, the rear side of the temperature changing chamber 200 is provided with a temperature changing air inlet 210 connected with a refrigerating system, and the first air return port 600 is positioned above the temperature changing chamber 200;

the fruit and vegetable chamber 300 is provided with a fruit and vegetable chamber air inlet 700, and the fruit and vegetable chamber air inlet 700 is communicated with the first air return opening 600 through an air duct;

when the refrigerator is in operation, part of cold air discharged by the refrigerating system circulates to the first air return port 600 through the refrigerating chamber 100, and part of cold air circulates to the first air return port 600 after passing through the temperature-changing chamber 200 and the refrigerating chamber 100, wherein the cold air of the first air return port 600 enters the fruit and vegetable chamber 300, and the air inlet temperature of the fruit and vegetable chamber 300 is more than 1.5 ℃.

Based on the above technical scheme, by arranging the variable temperature chamber 200 in the refrigerating chamber 100, variable temperature return air discharged by the variable temperature chamber 200 enters the first air return port 600 after passing through the refrigerating chamber 100, and the variable temperature return air discharged by the variable temperature chamber 200 exchanges heat again in the refrigerating chamber 100 because the temperature of the variable temperature return air is lower than that in the refrigerating chamber 100, so that the temperature of air discharged to the fruit and vegetable chamber through the first air return port 600 is not lower than 1.5 ℃, thereby avoiding the problem that food materials in the fruit and vegetable chamber 300 are frostbitten due to the fact that the temperature of the variable temperature drawer 220 is too low when the variable temperature drawer 220 directly enters the fruit and vegetable chamber 300 in the prior art, and avoiding the problem of energy loss caused by heating the return air by using a heating device; further, the variable-temperature return air exhausted by the variable-temperature chamber 200 is subjected to the cooling of the refrigerating chamber 100 in the refrigerating chamber 100, so that the cold energy of the variable-temperature return air of the variable-temperature chamber 200 is utilized, and the energy is saved; in addition, since the first return air port 600 is located above the variable temperature chamber 200, the variable temperature return air discharged from the variable temperature chamber 200 sinks to the bottom of the refrigerating chamber 100 because the cold air moves downward, so that the problem that the variable temperature return air of the variable temperature chamber 200 is directly discharged through the first return air port 600 is avoided, and further, the problem that food materials in the fruit and vegetable chamber 300 are not frosted is ensured.

In some embodiments of the present application, the distance between the first air return port 600 and the temperature changing chamber 200 is not less than 10cm, and the temperature changing return air discharged from the temperature changing chamber 200 sinks to the bottom of the refrigerating chamber 100 because the cold air moves downwards, so that the problem that the temperature changing return air of the temperature changing chamber 200 is directly discharged through the first air return port 600 is avoided, and further, the problem that food in the fruit and vegetable chamber 300 is not frosted is ensured.

In some embodiments of the present application, the refrigerator further includes a controller, the cold storage air inlet 500 is provided with a cold storage damper, the temperature changing air inlet 210 is provided with a temperature changing damper, the cold storage damper, the temperature changing damper and the refrigerating system are all electrically connected with the controller, and the controller is used for:

when the temperature in the refrigerating chamber 100 is greater than a preset refrigerating temperature, the refrigerating damper is opened and the refrigerating system is operated;

when the temperature in the variable temperature chamber 200 is greater than a preset variable temperature, the variable temperature damper is opened and the refrigeration system operates.

In some embodiments of the present application, a refrigeration temperature sensor is disposed in the refrigeration chamber 100, a temperature changing temperature sensor is disposed in the temperature changing chamber 200, the refrigeration temperature sensor and the temperature changing temperature sensor are electrically connected to a controller, when the refrigeration temperature sensor detects that the temperature in the refrigeration chamber 100 is greater than a preset refrigeration temperature, the controller controls the opening of the refrigeration damper, when the temperature sensor detects that the temperature in the temperature changing chamber 200 is greater than the preset temperature, the controller controls the opening of the temperature changing damper, and when the refrigeration damper or the temperature changing damper is opened, the controller controls the starting of the refrigeration system. The refrigerating chamber 100 and the temperature changing chamber 200 each have an independently provided damper to control the temperatures of the refrigerating chamber 100 and the temperature changing chamber 200, respectively, thereby achieving independent control.

In some embodiments of the present application, when the refrigerator is operated, the temperature in the temperature changing chamber 200 is maintained between-3 ℃ and +3 ℃, thereby, fruits and vegetables, beverages and meats are suitably stored in the temperature changing chamber 200, when the temperature changing chamber 200 is between 0 ℃ and +3 ℃, fruits and vegetables suitable for low-temperature storage can be stored therein, when the temperature changing chamber 200 is at 0 ℃, beverages can be stored, and when the beverages are taken out, smoothies can be generated by shaking, the temperature changing chamber is suitable for drinking and cooling in summer, when the temperature changing chamber 200 is at-3 ℃ to +0 ℃, fresh-keeping of meats can be realized, and thawing is not required when the temperature changing chamber 200 is taken out, and the use is convenient.

In the application, the fruit and vegetable room 300 does not have an independent air supply duct, an independent air return duct and an independent control Wen Fengmen, and the air return in the refrigerating room 100 and the air return room 200 are mixed and then transported to the fruit and vegetable room 300 for circulation, and the air return of the refrigerating room 100 and the air return room 200 can meet the cooling requirement due to the fact that the temperature in the fruit and vegetable room 300 is higher and the required cooling capacity is smaller, so that the cooling capacity can be saved.

In some embodiments of the present application, a refrigeration system includes an evaporator for cooling a gas to form a cool gas, a compressor, and a fan; the compressor is used for providing power for the circulation of the cold air; the blower is used for conveying cool air to the refrigerating chamber 100 or the temperature changing chamber 200;

the evaporator, the compressor and the fan are all electrically connected with the controller, when the temperature in the refrigerating chamber 100 is higher than the preset refrigerating temperature, the controller opens the refrigerating air door, and the controller starts the evaporator, the fan and the compressor;

when the temperature in the variable temperature chamber 200 is greater than a preset variable temperature, the controller opens the variable temperature damper and the controller starts the evaporator, fan and compressor.

As shown in fig. 3, in some embodiments of the present application, the temperature changing compartment 200 includes a temperature changing drawer 220 and a temperature changing cover plate 230, the temperature changing drawer 220 is disposed on a bottom wall of the refrigerating compartment 100, the temperature changing air inlet 210 is disposed at a rear side of the temperature changing drawer 220, the temperature changing cover plate 230 is disposed at a top of the temperature changing drawer 220, the temperature changing cover plate 230 is made of a heat insulating material, and by disposing the temperature changing cover plate 230, temperature inside the temperature changing drawer 220 and the refrigerating compartment 100 are prevented from being affected each other.

In some embodiments of the present application, the temperature changing compartment 200 further includes a temperature changing front cover 240 rotatably coupled to the front side of the temperature changing cover plate 230, the temperature changing front cover 240 being rotatable to open or cover the front side of the temperature changing drawer 220, whereby the temperature changing front cover 240 can be opened to take food placed in the temperature changing drawer 220.

In some embodiments of the present application, the temperature change drawer 220 is slidably disposed between the temperature change cover 230 and the bottom wall of the refrigerated compartment 100, thereby facilitating removal and installation of the temperature change drawer 220.

In some embodiments of the present application, the front side of the temperature change drawer 220 is provided with a handle 221, and a user can pull the temperature change drawer 220 out from between the temperature change cover 230 and the bottom wall of the refrigerator compartment 100 through the handle 221, thereby further facilitating the removal and installation of the temperature change drawer 220.

In some embodiments of the present application, a gap is left between the temperature changing front cover 240 and the temperature changing drawer 220 for discharging the gas in the temperature changing drawer 220, and the discharge of the temperature changing return air in the temperature changing drawer 220 can be realized by reserving the gap. Further, the air outlet of the temperature changing drawer 220 is located at the front side of the temperature changing drawer 220, so that cold air can enter from the rear side of the temperature changing drawer 220 and be discharged from the front side of the temperature changing drawer 220, the whole temperature changing drawer 220 is cooled, and the cold amount is fully utilized;

in some embodiments of the present application, the fruit and vegetable room air inlet 700 is located on the rear wall of the fruit and vegetable room 300, and the fruit and vegetable room air inlet 700 is located on the upper portion of the fruit and vegetable room 300, and the rear wall of the fruit and vegetable room 300 is also provided with the second air return port 800, the second air return port 800 is located on the lower portion of the fruit and vegetable room 300, and the fruit and vegetable room air inlet 700 is located on the upper portion of the fruit and vegetable room 300, and the second air return port 800 is located on the lower portion of the fruit and vegetable room 300, so that the cool air entering the fruit and vegetable room 300 can be cooled uniformly from top to bottom, and the cooling effect is good. The second return air inlet 800 is connected to the inlet end 900 of the evaporator so that the total return air can be recycled.

In some embodiments of the present application, the refrigerator further includes a freezing chamber 400, and a refrigerating system is provided in the freezing chamber 400.

the refrigeration system generates circulating cool air;

part of the circulating cool air enters the refrigerating chamber 100 to form refrigerating return air after refrigeration is completed;

part of cold air enters the variable temperature chamber 200, and variable temperature return air is formed after refrigeration is completed;

the variable temperature return air enters the refrigerating chamber 100 and is mixed with the refrigerating return air to form medium temperature air with the temperature not lower than 1.5 ℃ to enter the fruit and vegetable chamber 300, and the high temperature air after heat exchange in the fruit and vegetable chamber 300 is conveyed to a refrigerating system for refrigerating circulation.

Based on the above technical scheme, the embodiment of the application provides a wind circulation method, and a refrigerator and a wind circulation method thereof, wherein the temperature change drawer 220 is mixed with air in the refrigerating chamber 100 and then is input into the fruit and vegetable chamber 300, so that the mixed air temperature is moderate, the problem that food materials in the fruit and vegetable chamber 300 are frostbitten if the temperature of the temperature change drawer 220 is too low when return air of the temperature change drawer 220 directly enters the fruit and vegetable chamber 300 in the prior art is avoided, and the problem that energy loss is caused by heating the return air by using a heating device is avoided.

The working process of the application is as follows:

for convenience of description, the cool-on and shut-off temperatures are defined as tr_on/tr_off, the variable-temperature on and shut-off temperatures are defined as tc_on/tc_off,

when the refrigerating temperature reaches the starting temperature Tr_on, the refrigerating air door is opened, and when the refrigerating air door reaches the stopping temperature Tr_off, the refrigerating air door is closed; when the variable temperature reaches the starting temperature Tc_on, the variable temperature air door is opened, and when the variable temperature reaches the stopping temperature Tc_off, the variable temperature air door is closed; when the air door is opened, the fan operates, the compressor operates, or else, the fan stops operating, and the compressor is closed;

when the temperature changing chamber 200 is cooled, the temperature changing air door is opened, cold air (temperature T0, about-15 ℃) delivered by the evaporator reaches the temperature changing drawer 220, then reaches the refrigerating chamber 100 after exiting from the temperature changing drawer 220 (temperature Tb, about-2 ℃) and is mixed with air flow of the refrigerating chamber 100 and exchanges heat, the temperature rises to Tr (about 2 ℃), at this time, the air flow is delivered from the first air return port 600 to the fruit and vegetable chamber 300, the temperature is further raised to Ty (about 5 ℃) in the fruit and vegetable chamber 300, and finally the air flow is returned from the fruit and vegetable chamber 300 to the evaporator.

Compared with the prior art, the refrigerator and the air circulation method adopting the technical scheme of the application are tested, and as shown in the table below, after the position of the first air return port 600 is adjusted from the test data, the temperature of the fruit and vegetable chamber 300 is increased from 1 ℃ to 2.34 ℃, meanwhile, due to the temperature increase of the fruit and vegetable chamber 300, a heating device is avoided, the energy consumption is reduced from 0.57kWh/day to 0.5488kWh/day, and the energy consumption is reduced by 4%.

In summary, according to the refrigerator and the air circulation method of the embodiment of the application, the variable temperature chamber 200 is arranged in the refrigerating chamber 100, and variable temperature return air discharged by the variable temperature chamber 200 enters the first air return port 600 after passing through the refrigerating chamber 100, and as the temperature of the variable temperature return air is lower than that in the refrigerating chamber 100, the variable temperature return air discharged by the variable temperature chamber 200 exchanges heat again in the refrigerating chamber 100, so that the temperature of air discharged to the fruit and vegetable chamber through the first air return port 600 is not lower than 1.5 ℃, thereby avoiding the problem that food materials in the fruit and vegetable chamber 300 are frostbitten due to the fact that the temperature of the variable temperature drawer 220 is too low when the variable temperature drawer 220 returns air directly enters the fruit and vegetable chamber 300 in the prior art, and avoiding the problem of energy loss caused by heating the return air by using a heating device; further, the variable-temperature return air exhausted by the variable-temperature chamber 200 is subjected to the cooling of the refrigerating chamber 100 in the refrigerating chamber 100, so that the cold energy of the variable-temperature return air of the variable-temperature chamber 200 is utilized, and the energy is saved; in addition, since the first return air port 600 is located above the variable temperature chamber 200, the variable temperature return air discharged from the variable temperature chamber 200 sinks to the bottom of the refrigerating chamber 100 because the cold air moves downward, so that the problem that the variable temperature return air of the variable temperature chamber 200 is directly discharged through the first return air port 600 is avoided, and further, the problem that food materials in the fruit and vegetable chamber 300 are not frosted is ensured.

In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present application, and these modifications and substitutions should also be considered as being within the scope of the present application.

Claims

1. A refrigerator, comprising:

a case; a kind of electronic device with high-pressure air-conditioning system

A refrigerating system disposed at a rear side of the case for generating circulated cool air;

the box body is internally provided with:

the refrigerating chamber is provided with a refrigerating air inlet communicated with the refrigerating system at the rear side, the refrigerating air inlet is arranged at the upper part of the refrigerating chamber, and a first air return opening is further arranged at the rear side of the refrigerating chamber;

the temperature changing chamber is arranged in the refrigerating chamber, the rear side of the temperature changing chamber is provided with a temperature changing air inlet connected with the refrigerating system, and the first air return inlet is positioned above the temperature changing chamber; the distance between the first air return opening and the temperature changing chamber is not smaller than 10cm; a kind of electronic device with high-pressure air-conditioning system

when the refrigerator operates, part of cold air discharged by the refrigerating system circulates to a first air return port through a refrigerating chamber, and part of cold air circulates to the first air return port after passing through the temperature changing chamber and the refrigerating chamber, wherein the cold air of the first air return port enters the fruit and vegetable chamber, and the air inlet temperature of the fruit and vegetable chamber is higher than 1.5 ℃;

wherein, the alternating temperature room includes:

the temperature changing drawer is arranged on the bottom wall of the refrigerating chamber, and the temperature changing air inlet is arranged at the rear side of the temperature changing drawer;

the temperature changing cover plate is covered on the top of the temperature changing drawer and is made of heat insulation materials;

the temperature changing chamber further comprises a temperature changing front cover rotatably connected to the front side of the temperature changing cover plate, and the temperature changing front cover can rotate to be opened or cover the front side of the temperature changing drawer; a gap for discharging gas in the temperature changing drawer is reserved between the temperature changing front cover and the temperature changing drawer.

2. The refrigerator of claim 1, further comprising a controller, wherein the refrigerated air inlet is provided with a refrigerated damper, the variable temperature air inlet is provided with a variable temperature damper, the refrigerated damper, the variable temperature damper, and the refrigeration system are all electrically connected to the controller, and the controller is configured to:

3. The refrigerator of claim 2, wherein the temperature in the temperature changing chamber is maintained between-3 ℃ and +3 ℃ when the refrigerator is operated.

4. The refrigerator of claim 2, wherein the refrigeration system comprises:

an evaporator for cooling the gas to form a cool gas;

a compressor for powering the circulation of the cool air; a kind of electronic device with high-pressure air-conditioning system

A fan for delivering cool air to the refrigerating compartment or the temperature changing compartment;

the evaporator, the compressor and the fan are all electrically connected with the controller,

when the temperature in the refrigerating chamber is greater than a preset refrigerating temperature, the controller opens the refrigerating air door, and the controller starts the evaporator, the fan and the compressor;

5. The refrigerator of claim 4, wherein the fruit and vegetable compartment air inlet is located on the rear wall of the fruit and vegetable compartment, and the fruit and vegetable compartment air inlet is located on the upper portion of the fruit and vegetable compartment, and a second air return opening is further provided on the rear wall of the fruit and vegetable compartment, and is located on the lower portion of the fruit and vegetable compartment, and the second air return opening is connected with the air inlet end of the evaporator.

6. A method of circulating air comprising the steps of:

the refrigeration system generates circulating cool air;