Constant-temperature fresh-keeping drawer and refrigerator

Abstract

The invention discloses a constant-temperature fresh-keeping drawer and a refrigerator. The constant-temperature fresh-keeping drawer comprises a drawer body; the shell is arranged in a refrigerator body of the refrigerator; the shell is provided with a cavity so as to form a fresh air channel; an air outlet hole is formed in the shell, and the air outlet hole is communicated with the drawer body; the evaporator is arranged in the fresh air duct; and the refrigeration unit is arranged in a refrigerator body of the refrigerator and is connected with the evaporator to form a refrigerant circulation loop. According to the refrigerator, the fresh air channel is arranged, and the evaporator is arranged in the fresh air channel, so that the drawer body can store part of cooling capacity and slowly release the cooling capacity to form a function similar to thermal buffering, even if an original compressor of the refrigerator stops, the drawer body still has cooling capacity buffering, the temperature is prevented from rapidly rising, and the service life of the refrigerator is prolonged. Therefore, the temperature fluctuation amplitude is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a constant-temperature fresh-keeping drawer and a refrigerator. Background Art

[0002] At present, when the temperature in the refrigerating chamber or the freezing chamber reaches the predetermined temperature, the refrigerator will shut down the compressor to save energy consumption; due to the start and stop of the compressor, the temperature will have a periodic rising and falling process. Although this process will reduce energy consumption, it will also cause the temperature to fluctuate; the temperature fluctuation will cause an increase in the respiration intensity of fruits and vegetables, and a process of melting and recrystallization of ingredients such as meat in an ice-temperature or freezing environment. Especially for a specially set fresh-keeping drawer, through which fruits, vegetables and meats that need to be stored fresh and taken at any time are stored; the fresh-keeping drawer is mostly set in the refrigerating chamber and shares the air duct with the refrigerating chamber. When the compressor starts and stops, the temperature of the fresh-keeping drawer fluctuates greatly, which is not conducive to the fresh-keeping storage of fruits, vegetables and meats.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a constant-temperature fresh-keeping drawer and a refrigerator aiming at reducing the temperature fluctuation of the fresh-keeping drawer caused by the start and stop of the compressor in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A constant-temperature fresh-keeping drawer, comprising:

[0007] A drawer body;

[0008] A housing, arranged in the refrigerator cabinet; the housing has a cavity to form a new air duct; an air outlet hole is arranged on the housing, and the air outlet hole is communicated with the drawer body;

[0009] An evaporator, arranged in the new air duct;

[0010] A refrigeration unit, arranged in the refrigerator cabinet and connected to the evaporator to form a refrigerant circulation loop.

[0011] The constant-temperature fresh-keeping drawer, wherein the refrigeration unit includes:

[0012] A main compressor, arranged in the cabinet;

[0013] A main condenser, arranged in the cabinet;

[0014] A main evaporator, arranged in the air duct of the cabinet;

[0015] The main compressor, the main condenser and the main evaporator are connected in sequence to form a closed-loop circuit; the evaporator is connected in parallel with the main evaporator.

[0016] The constant-temperature fresh-keeping drawer further includes:

[0017] A three-way solenoid valve, which is arranged in the closed-loop circuit and is respectively connected to the main evaporator, the evaporator and the condenser.

[0018] In the constant-temperature fresh-keeping drawer, the fresh air duct is communicated with the air duct.

[0019] In the constant-temperature fresh-keeping drawer, the refrigeration unit includes:

[0020] An auxiliary compressor, which is arranged in the box body;

[0021] An auxiliary condenser, which is arranged in the box body and is respectively connected to the auxiliary compressor and the evaporator to form the refrigerant circulation circuit.

[0022] The constant-temperature fresh-keeping drawer further includes:

[0023] A blower, which is arranged in the fresh air duct.

[0024] The constant-temperature fresh-keeping drawer further includes:

[0025] A metal plate, which is arranged at the bottom of the drawer body.

[0026] The constant-temperature fresh-keeping drawer further includes:

[0027] An upper layer plate, which is arranged in the box body;

[0028] A lower layer plate, which is arranged in the box body and is located below the upper layer plate; an accommodation space is formed by enclosing between the upper layer plate, the lower layer plate and the box body, and both the drawer body and the shell are located in the accommodation space.

[0029] The constant-temperature fresh-keeping drawer further includes:

[0030] A temperature sensor, which is arranged in the drawer body.

[0031] A refrigerator, which includes the constant-temperature fresh-keeping drawer described in any one of the above.

[0032] Beneficial effects: In the prior art, when the original compressor is turned off, the temperature in the refrigerating chamber begins to rise, and the cold quantity of the drawer body can only be maintained by passive air flow, resulting in large temperature fluctuations. In this application, by providing the fresh air duct and arranging the evaporator in the fresh air duct, the drawer body can store part of the cold quantity and release it slowly, forming a function similar to heat buffering. Even if the original compressor of the refrigerator stops, the drawer body still has cold quantity buffering to avoid rapid temperature rise, thereby reducing the amplitude of temperature fluctuations. Brief Description of the Drawings

[0033] Figure 1 is an exploded structural schematic diagram of the constant-temperature fresh-keeping drawer in the present invention;

[0034] Figure 2 is a partial assembled structural schematic diagram of the constant-temperature fresh-keeping drawer in the present invention;

[0035] Figure 3 is a distribution structural schematic diagram of the constant-temperature fresh-keeping drawer in the refrigerator in the present invention;

[0036] Figure 4 is a principle block diagram of the refrigeration function of the constant-temperature fresh-keeping drawer in Embodiment 1 of the present invention;

[0037] Figure 5 is a principle block diagram of the refrigeration function of the constant-temperature fresh-keeping drawer in Embodiment 2 of the present invention. Detailed Description of the Invention

[0038] Those skilled in the art of the present technology can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of this application means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0039] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which this application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as herein.

[0040] The present invention provides a constant-temperature fresh-keeping drawer. As shown in Figure 1 , Figure 2 and Figure 3 , the constant-temperature fresh-keeping drawer includes: a drawer body 1, a housing 2, an evaporator 3, and a refrigeration unit; the housing 2 is arranged inside the refrigerator cabinet; the housing 2 has a cavity to form a fresh air duct; an air outlet hole 21 is provided on the housing 2, and the air outlet hole 21 communicates with the drawer body 1; the evaporator 3 is arranged inside the fresh air duct; the refrigeration unit is arranged inside the refrigerator cabinet and is connected to the evaporator 3 to form a refrigerant circulation loop.

[0041] Specifically, the drawer body 1 is arranged in the refrigerating chamber of the refrigerator and can share the low-temperature environment with the refrigerating chamber; the housing 2 is arranged around the drawer body 1 to form the fresh air duct inside the housing 2. By arranging the evaporator 3 inside the fresh air duct, after the evaporator 3 is connected to the refrigeration unit to form a refrigerant circulation loop, through the circulating flow of the refrigerant in the refrigerant circulation loop, when the refrigerant reaches the evaporator 3 and absorbs the heat of the air in the fresh air duct and evaporates inside the evaporator 3, the surface of the evaporator 3 becomes cold, thereby reducing the temperature of the air passing through the evaporator 3. The air cooled by the evaporator 3 in the fresh air duct is sent into the drawer body 1 through the air outlet hole 21 to achieve the effect of temperature reduction.

[0042] Compared with the original evaporator of the refrigerator (the main evaporator 4, as shown in Figure 4 ), in this application, the fresh air duct is provided, and a new and independent evaporator 3 is arranged inside the fresh air duct. The cold generated by the evaporator 3 directly acts on the drawer body 1, so that the drawer body 1 can preferentially obtain cold when bearing the temperature of the refrigerating chamber, and will not wait until the whole refrigerating chamber cools down before benefiting. Therefore, the drawer body 1 no longer depends on the overall cooling process of the refrigerating chamber, but can obtain the cold supplement given by the evaporator 3 faster.

[0043] It can be seen that in the prior art, when the original compressor (the main compressor 40, as shown in Figure 4When it is closed as shown in the figure, the temperature in the refrigerator compartment begins to rise, and the cold in the drawer body 1 can only be maintained by passive air flow, resulting in large temperature fluctuations. In this application, by providing the fresh air duct and arranging the evaporator 3 in the fresh air duct, the drawer body 1 can store part of the cold and release it slowly, forming a function similar to heat buffering. Even if the original compressor of the refrigerator stops, the drawer body 1 still has cold buffering to avoid rapid temperature rise, thereby reducing the amplitude of temperature fluctuations.

[0044] In the first embodiment of this application, as Figure 4 shown, the refrigeration unit includes: a main compressor 40, a main condenser 5, and a main evaporator 4. The main compressor 40, the main condenser 5, and the main evaporator 4 are all arranged in the box body, and the main evaporator 4 is located in the air duct of the box body. The main compressor 40, the main condenser 5, and the main evaporator 4 are connected in sequence to form a closed-loop circuit. The evaporator 3 is connected in parallel with the main evaporator 4.

[0045] Specifically, the main compressor 40, the main condenser 5, and the main evaporator 4 are the original refrigeration system of the refrigerator, that is, the evaporator 3 is connected to the original refrigeration system of the refrigerator in parallel with the main evaporator 4 to realize the circulation of the refrigerant, so as to realize the refrigeration of the drawer body 1 by the evaporator 3.

[0046] The fresh air duct is communicated with the air duct, so that the fresh air duct can be driven by the air flow in the air duct, so that the air whose temperature is reduced by the evaporator 3 in the fresh air duct can enter the drawer body 1 through the air outlet hole 21 to realize the cooling and refrigeration of the drawer body 1. At the same time, the evaporator 3 directly cools the drawer body 1 near the drawer body 1 without relying on the temperature change of the entire refrigerator compartment. In this way, even if the main compressor 40 of the main refrigeration system of the refrigerator starts and stops, the temperature of the moisture-proof drawer can still be relatively stable.

[0047] As Figure 4 shown, the constant temperature fresh-keeping drawer further includes a three-way solenoid valve 7. The three-way solenoid valve 7 is arranged in the closed-loop circuit and is respectively connected to the main evaporator 4, the evaporator 3, and the condenser.

[0048] Specifically, the three-way solenoid valve 7 is used to adjust the flow direction of the refrigerant flowing out of the main condenser 5, and selectively supply liquid to different evaporators 3, so as to control the on-off of the flow of the refrigerant from the condenser to the main evaporator 4 and the evaporator 3, and realize independent temperature control or optimize the refrigeration cycle.

[0049] When the three-way solenoid valve 7 only connects the main condenser 5 and the main evaporator 4, the refrigerating chamber operates, and the constant temperature fresh-keeping drawer does not refrigerate additionally but relies on the cooling supply from the refrigerating chamber. When the three-way solenoid valve 7 only connects the main condenser 5 and the evaporator 3, the constant temperature fresh-keeping drawer refrigerates independently and the main refrigeration system pauses. When the three-way solenoid valve 7 connects the main condenser 5 to both the evaporator 3 and the main evaporator 4 simultaneously, the refrigerating chamber and the constant temperature fresh-keeping drawer refrigerate at the same time.

[0050] For example, when the refrigerating chamber reaches the set temperature but the constant temperature fresh-keeping drawer needs to be cooled down, the three-way solenoid valve 7 can switch to the evaporator 3 to keep the refrigerating chamber at a constant temperature without affecting the independent temperature control of the constant temperature fresh-keeping drawer. Conversely, when the temperature of the constant temperature fresh-keeping drawer is stable but the temperature of the refrigerating chamber rises, the three-way solenoid valve 7 can close the refrigerant flow path leading to the evaporator 3 and only connect the main evaporator 4. It can be seen that by switching the three-way solenoid valve 7, the combination of the refrigeration unit and the evaporator 3 can dynamically adjust the refrigeration capacity according to the temperature requirements of different storages, reducing unnecessary energy consumption.

[0051] The outlet ends of the main evaporator 4 and the evaporator 3 are both connected to a three-way pipe 8, and thus are connected to the main compressor 40 through the three-way pipe 8 to form a refrigerant circulation loop.

[0052] The housing 2 is located above the drawer body 1, that is, both the fresh air duct and the evaporator 3 are located above the drawer body 1, so the air outlet holes 21 are arranged downward. The density of cold air is relatively large and it will naturally sink. Therefore, placing the evaporator 3 above the drawer body 1 can allow the cold air to diffuse from top to bottom, using natural convection to make the cold air evenly cover the entire drawer body 1 and reduce the temperature difference.

[0053] It can be understood that a main capillary tube 6 is also provided between the main condenser 5 and the three-way solenoid valve 7 for throttling and pressure reduction.

[0054] In the second embodiment of the present application, as Figure 5 shown, the refrigeration unit includes an auxiliary compressor 9 and an auxiliary condenser 10; the auxiliary compressor 9 is arranged inside the box; the auxiliary condenser 10 is arranged inside the box and is respectively connected to the auxiliary compressor 9 and the evaporator 3 to form the refrigerant circulation loop.

[0055] Specifically, in this embodiment, the evaporator 3 is not connected to the original refrigeration system of the refrigerator, but rather a separate refrigeration system is designed. That is, a set of compressor and condenser are additionally installed in the box body to form a new refrigerant circulation circuit. Similarly, the fresh air duct no longer depends on the original duct in the box body, but directly cools the drawer body 1 through the fresh air duct.

[0056] It can be seen that even if the main compressor 40 shuts down and the temperature in the refrigerating chamber is affected, under the action of the refrigerant circulation circuit, the cold quantity directly acts on the drawer body 1, without relying on the duct for transportation, reducing the lag and temperature fluctuation caused by the duct transmission, reducing the possible temperature change during the cold air transmission process, and enabling the temperature adjustment of the drawer body 1 to be faster and more accurate. The auxiliary compressor 9, the auxiliary condenser 10 and the evaporator 3 can work completely independently, and only refrigerate according to the temperature requirements of the constant temperature and humidity drawer, without being affected by the overall temperature control of the refrigerator.

[0057] The refrigeration of the new refrigerant circulation system for the drawer body 1 realizes the independent control and precise adjustment of the drawer body 1, with smaller start-stop adjustments, enabling the drawer body 1 to maintain a more stable temperature, thereby better preserving the freshness and moisture of the food materials.

[0058] It can be understood that an auxiliary capillary tube 11 can also be provided between the auxiliary condenser 10 and the evaporator 3 to throttle and reduce the pressure of the new refrigeration circulation flow path.

[0059] In an embodiment of the present application, the constant temperature fresh-keeping drawer further includes a fan, and the fan is arranged in the fresh air duct.

[0060] Specifically, the evaporator 3 itself does not actively generate air flow. Therefore, the fan is arranged in the fresh air duct so that the fan pushes the air flow to make the air pass through the fins of the evaporator 3 faster, thereby enhancing the cold quantity transfer ability of the evaporator 3 and making the cold air evenly distributed.

[0061] As Figure 1 and Figure 2 shown, the constant temperature fresh-keeping drawer further includes a metal plate 12, and the metal plate 12 is arranged at the bottom of the drawer body 1.

[0062] Specifically, the metal plate 12 is located at the bottom of the drawer body 1 and is in contact with the drawer body 1. The metal plate 12 has heat conductivity and can absorb and release cold quantity faster, making the temperature distribution inside the drawer body 1 more uniform and reducing the situation of local overcooling or overheating.

[0063] In addition, when the temperature of the drawer body 1 fluctuates, the metal plate 12 can play a certain role in thermal buffering, making the temperature change more stable and avoiding damage to the food materials in the drawer body 1 due to sudden temperature changes. At the same time, since the metal plate 12 can absorb cold evenly, it can reduce the local condensation phenomenon caused by uneven temperature in the drawer body 1, prevent water droplets from accumulating at a certain position, and affect the storage of food materials.

[0064] As Figure 1 and Figure 3 shown, the constant temperature fresh-keeping drawer further includes an upper plate 13 and a lower plate 14; the upper plate 13 is arranged inside the box body; the lower plate 14 is arranged inside the box body and is located below the upper plate 13; an accommodation space 100 is formed by surrounding between the upper plate 13, the lower plate 14 and the box body, and both the drawer body 1 and the housing 2 are located in the accommodation space 100.

[0065] Specifically, the upper plate 13 and the lower plate 14 are respectively arranged above the housing 2 and below the drawer body 1, so that the upper plate 13 and the lower plate 14 can surround the box body to form the accommodation space 100, and the accommodation space 100 is used to accommodate the housing 2 and the drawer body 1.

[0066] The drawer body 1 and the housing 2 are surrounded by the upper plate 13 and the lower plate 14, so that the drawer body 1 forms an independent space relative to the entire refrigerator compartment, avoiding the direct influence of the temperature fluctuation in the refrigerator compartment on the temperature in the drawer body 1. The setting of the accommodation space 100 enables even the main refrigeration system of the refrigerator.

[0067] The constant temperature fresh-keeping drawer further includes a temperature sensor, and the temperature sensor is arranged inside the drawer body 1.

[0068] Specifically, since there may be uneven temperature distribution in the refrigerator compartment, the actual temperature inside the drawer body 1 may deviate from the result obtained by the temperature sensor that specifically detects the temperature in the refrigerator compartment, resulting in inaccurate cooling. Therefore, in this application, the temperature sensor is directly arranged inside the drawer body 1 to directly measure the real temperature inside the drawer body 1, which can avoid the temperature error caused by the long distance of the temperature sensor in the refrigerator compartment, and can accurately adjust the cold air flow inside the drawer body 1 according to the temperature fluctuation of the reagent inside the drawer body 1, improving the freshness preservation accuracy.

[0069] This application also provides a refrigerator, the refrigerator includes the constant temperature fresh-keeping drawer described in any one of the above, and the refrigerator further includes a box body, and the drawer body is slidably arranged inside the box body.

[0070] In summary, the present application further provides a constant-temperature fresh-keeping drawer and a refrigerator. The constant-temperature fresh-keeping drawer includes: a drawer body; a housing disposed within the refrigerator cabinet; the housing having a cavity to form a fresh air duct; an air outlet hole provided on the housing, the air outlet hole communicating with the drawer body; an evaporator disposed within the fresh air duct; and a refrigeration unit disposed within the refrigerator cabinet and connected to the evaporator to form a refrigerant circulation loop. In the prior art, when the original compressor is turned off, the temperature in the refrigerating chamber begins to rise, and the cold quantity of the drawer body can only be maintained by passive air flow, resulting in a large temperature fluctuation. In the present application, by providing the fresh air duct and disposing the evaporator within the fresh air duct, the drawer body can store part of the cold quantity and slowly release it, forming a function similar to heat buffering. Even if the original compressor of the refrigerator stops, the drawer body still has cold quantity buffering to prevent the temperature from rising rapidly, thereby reducing the amplitude of temperature fluctuation.

[0071] Those skilled in the art of the present technology can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present application means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0072] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the field to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as herein.

Claims

1. A constant temperature fresh-keeping drawer, characterized in that: It includes: Drawer body; A housing is arranged in the refrigerator; The shell has a cavity to form a new air duct; The shell is provided with an air outlet, and the air outlet is connected with the drawer body; an evaporator, arranged in the fresh air duct; The refrigeration unit is arranged in the refrigerator body and connected with the evaporator to form a refrigerant circulation loop.

2. The constant temperature fresh-keeping drawer according to claim 1, characterized in that: The refrigeration unit comprises: A main compressor is arranged in the box; A main condenser is arranged in the box; A main evaporator is arranged in the air duct of the box; The main compressor, the main condenser and the main evaporator are connected in sequence to form a closed loop; the evaporator is connected in parallel with the main evaporator.

3. The constant temperature fresh-keeping drawer according to claim 2, characterized in that: It also includes: A three-way solenoid valve is arranged in the closed loop and is respectively connected to the main evaporator, the evaporator and the condenser.

4. The constant temperature fresh-keeping drawer according to claim 2, characterized in that: The new air duct is communicated with the air duct.

5. The constant temperature fresh-keeping drawer according to claim 1, characterized in that: The refrigeration unit comprises: A secondary compressor is arranged in the box; The auxiliary condenser is arranged in the box body and is respectively connected to the auxiliary compressor and the evaporator to form the refrigerant circulation loop.

6. The constant temperature fresh-keeping drawer according to claim 1, characterized in that: It also includes: The fan is arranged in the fresh air duct.

7. The constant temperature fresh-keeping drawer according to claim 1, characterized in that: It also includes: The metal plate is arranged at the bottom of the drawer body.

8. The constant temperature fresh-keeping drawer according to claim 1, characterized in that: It also includes: An upper plate is arranged in the box; The lower plate is arranged in the box body and is located below the upper plate. The upper plate, the lower plate and the box body together form a storage space, and the drawer body and the shell are both located in the storage space.

9. The constant temperature fresh-keeping drawer according to claim 1, characterized in that: It also includes: The temperature sensor is arranged in the drawer body.

10. A refrigerator, characterized in that: It comprises a constant temperature fresh-keeping drawer as described in any one of claims 1 to 9.

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