A multi-system refrigerator and refrigeration system

Abstract

This utility model discloses a multi-system refrigerator and its refrigeration system. The multi-system refrigerator includes a refrigerator compartment, an ice-making compartment, an ultrafreezing compartment, and a variable-temperature compartment. It also includes a variable-temperature evaporator for providing cooling to the variable-temperature compartment, which is mounted on the back of the ultrafreezing compartment. Compared with the prior art, this utility model adjusts the evaporator layout in the multi-system refrigerator, placing the variable-temperature evaporator on the back of the ultrafreezing compartment. This avoids the impact of the variable-temperature evaporator on the variable-temperature compartment during defrosting, resulting in a more stable temperature in the variable-temperature compartment.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration, and in particular to a multi-system refrigerator and refrigeration system. Background Technology

[0002] Multi-system refrigerators have multiple compartments, with the evaporator typically located at the back of the corresponding compartment. This facilitates installation, maintenance, and airflow design. However, when the evaporator enters defrost mode, the temperature of each compartment may fluctuate significantly due to the influence of the evaporator at its back. Increased compartment temperature may promote bacterial growth and shorten food shelf life. The variable temperature compartment, typically used for temperature-sensitive foods, is more susceptible to spoilage during defrost due to the increased temperature of the evaporator at the back. Furthermore, separate defrosting and cooling control for each evaporator may cause significant temperature fluctuations in other compartments when one evaporator is defrosting, leading to increased overall refrigerator energy consumption.

[0003] Therefore, how to design a multi-system refrigerator and refrigeration system that can avoid the impact of evaporator defrosting on food storage in the variable temperature compartment is a technical problem that the industry urgently needs to solve. Utility Model Content

[0004] In response to the problem that the temperature of the variable temperature compartment fluctuates greatly due to the defrosting of the evaporator in the existing technology, which affects food storage, this utility model proposes a multi-system refrigerator and refrigeration system.

[0005] The technical solution of this utility model is to propose a multi-system refrigerator, including a refrigerator compartment 100, an ice-making compartment 200, an ultra-freezing compartment 300, and a variable temperature compartment 400, and also includes a variable temperature evaporator 4 for providing cooling capacity to the variable temperature compartment 400, the variable temperature evaporator 4 being assembled on the back of the ultra-freezing compartment 300.

[0006] Furthermore, it also includes a refrigeration evaporator 1 for providing cooling capacity to the refrigeration compartment 100, an ice-making evaporator 2 for providing cooling capacity to the ice-making compartment 200, and a freezing evaporator 3 for providing cooling capacity to the superfreezing compartment 300;

[0007] The refrigeration evaporator 1 is mounted on the back of the refrigeration compartment 100, the ice-making evaporator 2 is mounted on the back of the ice-making compartment 200, and the freezing evaporator 3 is mounted on the back of the superfreezing compartment 300.

[0008] Furthermore, it also includes a machine room 500, in which at least a condenser 8 and a compressor 9 are installed for forming a refrigeration circuit with the refrigeration evaporator 1, the ice-making evaporator 2, the freezing evaporator 3 and the variable temperature evaporator 4;

[0009] In the refrigeration circuit, the refrigeration evaporator 1, the ice-making evaporator 2, the freezing evaporator 3, and the variable temperature evaporator 4 are connected in parallel via a switching valve 5.

[0010] Furthermore, the first end of the switching valve 5 is connected in series with the refrigeration evaporator 1 and then to the freezing evaporator 3; the second end of the switching valve 5 is connected in series with the ice-making evaporator 2 and then to the freezing evaporator 3; the third end of the switching valve 5 is connected in series with the variable temperature evaporator 4 and then to the freezing evaporator 3; the fourth end of the switching valve 5 is connected to the freezing evaporator 3; and the other end of the freezing evaporator 3 is sequentially connected to the compressor 9 and the condenser 8 and then returns to the fifth end of the switching valve 5.

[0011] Furthermore, it also includes a refrigeration capillary tube 10 connected in series between the first end of the switching valve 5 and the refrigeration evaporator 1, an ice-making capillary tube 11 connected in series between the second end of the switching valve 5 and the ice-making evaporator 2, a variable-temperature capillary tube 12 connected in series between the third end of the switching valve 5 and the variable-temperature evaporator 4, and a freezing capillary tube 13 connected in series between the fourth end of the switching valve 5 and the freezing evaporator 3.

[0012] Furthermore, it also includes a dryer filter 6 and an anti-condensation pipe 7 connected in series between the fifth end of the switching valve 5 and the condenser 8.

[0013] Furthermore, it also includes a refrigeration fan 14 disposed around the refrigeration evaporator 1, an ice-making fan 15 disposed around the ice-making evaporator 2, a refrigeration fan 16 disposed around the freezing evaporator 3, and a variable temperature fan 17 disposed around the variable temperature evaporator 4.

[0014] Furthermore, when the refrigeration evaporator 3 has a refrigeration demand, the switching valve 5 controls the fourth end of the switching valve 5 to be turned on when the temperature in the refrigerator compartment 1, the ice-making compartment 2, and the variable temperature compartment 4 reaches the shutdown point.

[0015] Furthermore, when the refrigerated evaporator 1 has a refrigeration demand, the first end of the switching valve 5 is turned on;

[0016] When the ice-making evaporator 2 has a cooling demand, the second end of the switching valve 5 is turned on;

[0017] When the variable temperature evaporator 4 has a cooling demand, the third end of the switching valve 5 is turned on.

[0018] This utility model also proposes a refrigeration system, which has the above-mentioned multi-system refrigerator.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] 1. This utility model optimizes the layout of each evaporator and assembles the variable temperature evaporator at the back of the superfreezing chamber, which can avoid the problem of excessive temperature fluctuation in the variable temperature chamber when the variable temperature evaporator is in the defrosting state.

[0021] 2. This utility model sets up a refrigeration evaporator, an ice-making evaporator, a freezing evaporator, and a variable temperature evaporator in parallel through a switching valve, and controls the switching valve according to the defrosting requirements, so that when the variable temperature evaporator is defrosting, the other compartments can continue to cool normally according to the control logic, and maintain the temperature of each compartment is stable. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an overall layout diagram of the multi-system refrigerator of this utility model;

[0024] Figure 2 This is a layout diagram of the evaporator of the multi-system refrigerator of this utility model;

[0025] Figure 3 This is the control flowchart of this utility model;

[0026] Figure 4 This is a layout logic diagram of the multi-system refrigerator of this utility model;

[0027] Among them, 100 is the cold storage room, 200 is the ice-making room, 300 is the super-freezing room, 400 is the variable temperature room, and 500 is the machinery room;

[0028] 1 is the refrigeration evaporator, 2 is the ice-making evaporator, 3 is the freezing evaporator, 4 is the variable temperature evaporator, 5 is the switching valve, 6 is the dryer filter, 7 is the anti-condensation tube, 8 is the condenser, 9 is the compressor, 10 is the refrigeration capillary tube, 11 is the ice-making capillary tube, 12 is the variable temperature capillary tube, 13 is the freezing capillary tube, 14 is the refrigeration fan, 15 is the ice-making fan, 16 is the freezing fan, and 17 is the variable temperature fan. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0031] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] Multi-system refrigerators have multiple compartments, and the evaporator is usually located at the back of the corresponding compartment. This facilitates installation and maintenance, as well as airflow design. However, when the evaporator enters defrosting mode, the temperature of each compartment may fluctuate significantly due to the influence of the evaporator at its back. For example, the variable temperature compartment has a corresponding variable temperature evaporator at its back. However, when the variable temperature evaporator defrosts, the temperature will rise above 0 degrees Celsius, which will cause excessive temperature fluctuations in the variable temperature compartment and affect the storage of food in the variable temperature compartment.

[0033] To address the aforementioned issues, this utility model proposes a multi-system refrigerator, which includes a refrigerator compartment 100, an ice-making compartment 200, an ultrafreezing compartment 300, and a variable temperature compartment 400 for common refrigerator storage functions.

[0034] The multi-system refrigerator proposed in this utility model also includes a variable temperature evaporator 4 for providing cooling capacity to the variable temperature compartment 400, and the variable temperature evaporator 4 is mounted on the back of the superfreezing compartment 300.

[0035] like Figure 4 As shown, this utility model has four compartments, namely a refrigerator compartment 100, an ice-making compartment 200, an ultra-freezing compartment 300, and a variable temperature compartment 400;

[0036] Each compartment is equipped with an evaporator: the refrigerator compartment 100 has a refrigerator evaporator 1, the ice-making compartment 200 has an ice-making evaporator 2, the superfreezing compartment 300 has a freezing evaporator 3, and the variable temperature compartment 400 has a variable temperature evaporator 4. By adjusting the operating conditions of the evaporators, the cooling needs of different compartments can be met.

[0037] In traditional designs, each evaporator should be located at the back of its corresponding compartment. For example, refrigeration evaporator 1 is located at the back of the refrigerator compartment 100, ice-making evaporator 2 is located at the back of the ice-making compartment, and freezing evaporator 3 is located at the back of the superfreezing compartment 300. However, if the variable-temperature evaporator 4 is located at the back of the variable-temperature compartment 4, its surface temperature will rise above 0 degrees Celsius during defrosting, potentially causing excessive temperature fluctuations within the variable-temperature compartment 4 and affecting food storage. To address this issue, such as... Figure 4 The present invention places the variable temperature evaporator 4 at the back of the superfreezing chamber 300. Since the temperature inside the superfreezing chamber 300 is generally low, the heat of the variable temperature evaporator 4 has little impact on the superfreezing chamber 300, thus avoiding the impact of the variable temperature evaporator 4 on food storage during defrosting.

[0038] Based on the above settings, this utility model can achieve the beneficial effects described above: by optimizing the layout of each evaporator and assembling the variable temperature evaporator 4 on the back of the superfreezing chamber 300, the problem of excessive temperature fluctuation in the variable temperature chamber 400 caused by the variable temperature evaporator 4 in the defrosting state can be avoided.

[0039] Furthermore, in addition to the variable temperature evaporator 4 mentioned above, the multi-system refrigerator proposed in this utility model also includes a refrigeration evaporator 1 for providing cooling capacity to the refrigeration compartment 100, an ice-making evaporator 2 for providing cooling capacity to the ice-making compartment 200, and a freezing evaporator 3 for providing cooling capacity to the superfreezing compartment 300.

[0040] Among them, the refrigeration evaporator 1 is installed on the back of the refrigeration compartment 100, the ice-making evaporator 2 is installed on the back of the ice-making compartment 200, and the freezing evaporator 3 is installed on the back of the superfreezing compartment 300.

[0041] The refrigerator compartment 100, ice maker compartment 200, and superfreezer compartment 300 have different cooling capacity requirements. If a single evaporator is used to control them, the cooling capacity requirements of different compartments cannot be met. This invention provides corresponding refrigerator evaporator 1, ice maker evaporator 2, and freezer evaporator 3 to provide the required cooling capacity for the refrigerator compartment 100, ice maker compartment 200, and superfreezer compartment 300 respectively, thereby meeting the cooling capacity requirements of different compartments.

[0042] Based on the above design, this invention can meet the cooling capacity requirements of different compartments in a refrigerator, thereby adapting to different storage environments and preservation conditions for food and improving the user experience.

[0043] Furthermore, the above four compartments are used to achieve refrigerator cooling. However, the evaporator actually provides cooling through refrigerant during the cooling process. Therefore, in order to meet the cooling capacity requirements of the above four compartments, a refrigeration circuit needs to be designed.

[0044] To meet the above requirements, the multi-system refrigerator proposed in this utility model also includes a mechanical compartment 500, in which at least a condenser 8 and a compressor 9 are installed to form a refrigeration circuit for the refrigeration evaporator 1, the ice-making evaporator 2, the freezing evaporator 3 and the variable temperature evaporator 4.

[0045] In the refrigeration circuit, the refrigeration evaporator 1, the ice-making evaporator 2, the freezing evaporator 3, and the variable temperature evaporator 4 are connected in parallel via a switching valve 5;

[0046] Please see Figure 1 The mechanical chamber 500 proposed in this utility model is simultaneously connected to the refrigeration evaporator 1 in the refrigeration chamber 100, the ice-making evaporator 2 in the ice-making chamber 200, the freezing evaporator 3 in the superfreezing chamber 300, and the variable temperature evaporator 4 in the variable temperature chamber 400. Under this parallel connection method, all evaporators only need one set of condensers 8 and compressors 9 to form a refrigeration circuit, without the need to configure a corresponding refrigeration circuit for each evaporator.

[0047] The switching valve 5 in this utility model can simultaneously turn on one or more of the refrigeration evaporator 1, ice-making evaporator 2, freezing evaporator 3, and variable temperature evaporator 4 connected to it, thereby realizing the refrigeration control of one or more compartments.

[0048] Based on the above configuration, this utility model only requires one set of condenser 8 and compressor 9 to achieve refrigeration control of multiple compartments, saving the use of multiple sets of condenser 8 and compressor 9 and reducing design costs.

[0049] Please see Figure 1 and Figure 2 The specific connection method of the above-mentioned refrigeration flow path in this utility model is as follows: the first end of the switching valve 5 is connected in series with the refrigeration evaporator 1 and then connected to the freezing evaporator 3; the second end of the switching valve 3 is connected in series with the ice-making evaporator 2 and then connected to the freezing evaporator 3; the third end of the switching valve 5 is connected in series with the variable temperature evaporator 4 and then connected to the freezing evaporator 3; the fourth end of the switching valve 5 is connected to the freezing evaporator 3; and the other end of the freezing evaporator 3 is connected in sequence with the compressor 9 and the condenser 8 and then returns to the fifth end of the switching valve 5.

[0050] Based on the above settings, this utility model can use compressor 9 and condenser 8 as the main refrigerant flow path, and then form four sub-refrigerant flow paths through switching valve 5. The flow directions of the four sub-refrigerant flow paths are as follows: compressor 9, condenser 8, switching valve 5, refrigeration evaporator 1, freezing evaporator 3, and compressor 9.

[0051] Compressor 9, condenser 8, switching valve 5, ice-making evaporator 2, freezing evaporator 3, compressor 9;

[0052] Compressor 9, condenser 8, switching valve 5, variable temperature evaporator 4, refrigeration evaporator 3, compressor 9;

[0053] Compressor 9, condenser 8, switching valve 5, refrigeration evaporator 3, compressor 9;

[0054] It can be seen that the four refrigerant flow paths share components such as compressor 9 and condenser 8. That is, under this connection method, multiple refrigerant flow paths can be set up with only one set of compressor 9 and condenser 8.

[0055] In addition, the four refrigerant flow paths pass through the evaporators in the refrigerator compartment 100, ice-making compartment 200, superfreezing compartment 300, and variable temperature compartment 400 respectively. The evaporators then use the refrigerant to cool the corresponding compartments, thereby meeting the cooling needs of different compartments. In other words, under this connection method, a set of condensers 8 and compressors 9 can also be used to control the cooling of multiple compartments and meet their cooling needs.

[0056] Furthermore, the present invention also includes a refrigeration capillary tube 10 connected in series between the first end of the switching valve 5 and the refrigeration evaporator 1, an ice-making capillary tube 11 connected in series between the second end of the switching valve 5 and the ice-making evaporator 2, a variable temperature capillary tube 12 connected in series between the third end of the switching valve 5 and the variable temperature evaporator 4, and a freezing capillary tube 13 connected in series between the fourth end of the switching valve 5 and the freezing evaporator 3.

[0057] Here, the refrigeration capillary 10, ice-making capillary 11, variable-temperature capillary 12, and freezing capillary 13 are all slender copper tubes with a small aperture and uniform cross-section. One end of each tube is connected to the condenser 8 via a switching valve 5, and the other end is connected to the refrigeration evaporator 1, ice-making evaporator 2, freezing evaporator 3, and variable-temperature evaporator 4, respectively. They are used to throttle and reduce pressure in the refrigeration system.

[0058] This invention can control the cooling speed and minimum temperature by adjusting the length and core diameter of the refrigeration capillary tube 10, ice-making capillary tube 11, variable-temperature capillary tube 12, and freezing capillary tube 13, and maintain a certain pressure difference between the condenser 8 and the refrigeration evaporator 1, ice-making evaporator 2, freezing evaporator 3, and variable-temperature evaporator 4, so as to ensure that the refrigerant has a high pressure in the condenser 8, thereby allowing the refrigerant to dissipate heat and condense into a liquid in the condenser 8.

[0059] In addition, the refrigeration capillary tube 10, ice-making capillary tube 11, variable temperature capillary tube 12, and freezing capillary tube 13 can also control the refrigerant flow rate. If the capillary tube resistance is high, the refrigerant flow rate is low, the cooling capacity is low, and the evaporation temperature is low; if the capillary tube resistance is low, the refrigerant flow rate is high, the cooling capacity is high, and the evaporation temperature is high.

[0060] As can be seen from the above settings, the capillary tubes can control the cooling speed and minimum temperature. Since the cooling requirements of different compartments are different, the capillary tubes connected to the refrigeration evaporator 1, ice-making evaporator 2, freezing evaporator 3, and variable temperature evaporator 4 also need to be different to meet different cooling requirements. Therefore, in the above settings, the capillary tubes are connected to the evaporators in a one-to-one correspondence, so that each capillary tube controls the cooling capacity of the corresponding evaporator.

[0061] Here, the refrigeration capillary tube 10 can control the cooling capacity of the refrigeration evaporator 1, the ice-making capillary tube 11 can control the cooling capacity of the ice-making evaporator 2, the variable temperature capillary tube 12 can control the cooling capacity of the variable temperature evaporator 4, and the freezing capillary tube 13 can control the cooling capacity of the freezing capillary tube. Then, the refrigeration evaporator 1, the ice-making evaporator 2, the freezing evaporator 3, and the variable temperature evaporator 4 are placed on the back of the corresponding compartments to meet the cooling needs of different compartments.

[0062] In other words, by setting up the above-mentioned refrigeration capillary 10, ice-making capillary 11, variable temperature capillary 12, and freezing capillary 13, this utility model can control the refrigeration evaporator 1, ice-making evaporator 2, freezing evaporator 3, and variable temperature evaporator 4 to meet the refrigeration needs of their corresponding compartments, thereby adapting to food storage.

[0063] Please participate Figure 1 and Figure 2 The present invention also includes a drying filter 6 and an anti-condensation tube 7 connected in series between the fifth end of the switching valve 5 and the condenser 8.

[0064] The dryer filter 6 has the following function: removing moisture. When air enters the refrigerator, it contains a certain amount of moisture. This moisture can cause food to spoil, mold, and produce odors. The dryer filter 6 can absorb and remove this moisture, keeping the inside of the refrigerator relatively dry.

[0065] Filtering impurities: There may be tiny particulate matter such as dust, bacteria, and pollen in the air. If these impurities are not filtered, they can easily enter the food and may affect the hygiene and taste of the food. The dryer filter 6 can effectively filter out these tiny particulate matter.

[0066] Preventing frost formation: During the operation of the refrigeration system, water vapor condensation caused by temperature differences can form frost or frosting. Frosting reduces the cooling effect and increases energy consumption. By using the dryer filter 6, moisture in the humid air can be absorbed, reducing the occurrence of frost.

[0067] Protecting refrigeration equipment: Moisture and impurities can corrode and damage the internal parts of the refrigeration system. The dryer filter 6 can prevent these harmful substances from entering the refrigeration system and extend its service life.

[0068] The anti-condensation tube 7 is designed to prevent external moisture from condensing into water droplets on the edges of each compartment door, thus keeping the outside of the refrigerator dry and clean. When the refrigerator compartment door is opened, moisture in the air easily condenses on the edge of the door due to the temperature difference between the inside and outside. The anti-condensation tube 7 can effectively prevent this from happening.

[0069] Please see Figure 2The present invention also includes a refrigeration fan 14 disposed around the refrigeration evaporator 1, an ice-making fan 15 disposed around the ice-making evaporator 2, a refrigeration fan 16 disposed around the freezing evaporator 3, and a variable temperature fan 17 disposed around the variable temperature evaporator 4.

[0070] Here, the purpose of setting up the refrigeration fan 14, ice-making fan 15, freezing fan 16 and variable temperature fan 17 in this utility model is to maintain air circulation. By setting up the refrigeration fan 14, ice-making fan 15, freezing fan 16 and variable temperature fan 17, the internal temperature of the refrigerator can be distributed more evenly, avoiding overheating and overcooling, and allowing fresh air to enter the refrigerator to remove odors.

[0071] In addition, the installation of refrigeration fan 14, ice maker fan 15, freezer fan 16 and variable temperature fan 17 can achieve better cooling effect. Refrigeration fan 14, ice maker fan 15, freezer fan 16 and variable temperature fan 17 can help the refrigeration system to expel hot air, thereby improving refrigeration efficiency and reducing or maintaining the temperature inside the refrigerator within the set temperature range.

[0072] Finally, the installation of refrigeration fan 14, ice-making fan 15, freezing fan 16, and variable temperature fan 17 can also prevent food from spoiling. The installation of refrigeration fan 14, ice-making fan 15, freezing fan 16, and variable temperature fan 17 can maintain a relatively stable temperature around the food, thereby extending the shelf life of various foods.

[0073] In addition, as mentioned above, in this utility model, the variable temperature evaporator 4 is placed at the back of the superfreezing chamber 300, thereby avoiding the problem that the surface temperature of the variable temperature evaporator 4 exceeds 0 degrees during defrosting, thus providing heat to the variable temperature chamber 400 and causing excessive temperature fluctuations inside the variable temperature chamber 400.

[0074] In this configuration, the temperature of the superfreeze compartment 300 is relatively low, and the defrosting of the variable-temperature evaporator 4 has little impact on the superfreeze compartment 300. In order to further reduce the impact of the variable-temperature evaporator 4 on the superfreeze compartment 300 during defrosting, the control logic for defrosting and cooling of each compartment in the refrigerator has been optimized based on the aforementioned switching valve 5. This is mainly used to control the freezing evaporator 3 to be in a cooling state during the defrosting of the variable-temperature evaporator 4. Although the surface temperature of the variable-temperature evaporator 3 is higher than 0 degrees Celsius and provides some heat to the superfreeze compartment 300, the freezing evaporator 3 is still providing cold energy to the superfreeze compartment 300. This can avoid temperature fluctuations in the superfreeze compartment 300 and ensure the food storage effect.

[0075] Specifically, the control logic of this utility model is as follows:

[0076] When there is a cooling demand in the refrigeration evaporator 3, the switching valve 5 controls the fourth end of the switching valve 5 to be open when the temperature in the refrigerator compartment 1, ice maker compartment 2, and variable temperature compartment 4 reaches the shutdown point.

[0077] When there is a cooling demand in the refrigeration evaporator 1, the first end of the switching valve 5 is turned on.

[0078] When there is a cooling demand in the ice evaporator 2, the second end of the switching valve 5 is turned on.

[0079] When the variable temperature evaporator 4 has a cooling demand, the third end of the switching valve 5 is turned on.

[0080] Based on the above control logic, the control of the switching valve 5 in this utility model can be divided into the following four cases:

[0081] Scenario 1:

[0082] When it is detected that the variable temperature evaporator 4 needs to defrost while other evaporators do not need to defrost, the switching valve 5 is switched to the branch that conducts the variable temperature capillary tube 12 to pre-cool the variable temperature evaporator 4 before defrosting. After the variable temperature evaporator 4 is pre-cooled, the switching valve 5 is switched to the branch that conducts the refrigeration capillary tube 10, the ice-making capillary tube 11, and the freezing wool tube 13. Except for the variable temperature chamber 400, the other chambers are refrigerated according to the logic. Since the variable temperature evaporator 4 is located behind the super-freezing chamber 300, the temperature fluctuation in the variable temperature chamber 400 is small at this time.

[0083] Scenario 2:

[0084] When it is detected that the refrigerator evaporator 1 or the ice evaporator 2 needs to be defrosted, while the other evaporators do not need to be defrosted, the switching valve 5 is switched to open the refrigerator capillary tube 10 or the ice capillary tube 11 to pre-cool the refrigerator evaporator 1 or the ice evaporator 2 before defrosting. Then the switching valve 5 is switched to open the remaining capillary tubes, and each compartment is cooled according to the logic.

[0085] Scenario 3:

[0086] When it is detected that the evaporator 3 needs to be defrosted, while the other evaporators do not need to be defrosted, the refrigerator compartment 100, ice maker 200 and variable temperature compartment 400 are controlled to cool according to logic. When the temperature of each compartment reaches the stop point, the switching valve 5 switches to conduct the freezing hose 13 to pre-cool the evaporator 3 before defrosting, and then defrosts, and all compartments stop cooling.

[0087] In this case, the maximum cooling time can also be set for the refrigerator compartment 100, the ice maker compartment 200, and the variable temperature compartment 400. If the temperature of each compartment has not reached the stop point within the maximum cooling time, the switching valve 5 is directly controlled to switch the conduction of the freezing yarn tube 13 to pre-cool the freezing evaporator 3 before defrosting, and then defrost, and each compartment stops cooling.

[0088] Scenario 4:

[0089] When multiple evaporators are detected to require defrosting, first determine whether the refrigeration evaporator 3 needs defrosting. If it does, defrost according to the above scenario 3. If the refrigeration evaporator 3 does not need defrosting, defrost in the order of refrigeration evaporator 1, ice-making evaporator 2, and variable temperature evaporator 4.

[0090] Please see Figure 3 In this scenario, the specific cooling logic inside the refrigerator is as follows: first, determine whether the freezer evaporator 3 has completed defrosting (i.e., whether defrosting is required);

[0091] If the judgment is no (that is, defrosting is required), then according to the logic of scenario three, the refrigerator compartment 100, ice maker 200 and variable temperature compartment 400 are controlled to cool according to the logic. When the temperature of each compartment reaches the stop point, the switching valve 5 switches to conduct the freezing yarn tube 13 to pre-cool the freezing evaporator 3 before defrosting, and then defrosting is carried out. All compartments stop cooling.

[0092] If the determination is yes, then proceed to determine whether defrosting has been completed (i.e. whether defrosting is required) in the refrigeration evaporator 1, ice-making evaporator 2, and variable temperature evaporator 4.

[0093] If the condition is no (i.e., defrosting is required), then defrost in the following order: refrigeration evaporator 1, ice-making evaporator 2, and variable temperature evaporator 4.

[0094] If the condition is met, then each evaporator is directly controlled to perform cooling according to the logic.

[0095] Based on the above-mentioned control logic and combined with the switching valve 5 and the above-mentioned defrosting control logic, this utility model enables the variable temperature evaporator 4 corresponding to the variable temperature chamber 400 to remain in the refrigeration state when the variable temperature evaporator 4 is in the defrosting period, thereby maintaining the temperature stability of the superfreezing chamber 300 during the defrosting of the variable temperature evaporator 4.

[0096] In other words, this utility model can achieve the above-mentioned beneficial effects:

[0097] This invention connects a refrigeration evaporator, an ice-making evaporator, a freezing evaporator, and a variable-temperature evaporator in parallel via a switching valve. The switching valve is controlled according to defrosting requirements, which enables the other compartments to maintain normal cooling according to the control logic while the variable-temperature evaporator is defrosting, thus keeping the temperature of each compartment stable.

[0098] Based on the aforementioned multi-system refrigerator, this utility model also proposes a refrigeration system having the aforementioned multi-system refrigerator.

[0099] In summary, compared with the prior art, this utility model has at least the following beneficial effects:

[0100] 1. This utility model optimizes the layout of each evaporator and assembles the variable temperature evaporator at the back of the superfreezing chamber, which can avoid the problem of excessive temperature fluctuation in the variable temperature chamber when the variable temperature evaporator is in the defrosting state.

[0101] 2. This utility model sets up a refrigeration evaporator, an ice-making evaporator, a freezing evaporator, and a variable temperature evaporator in parallel through a switching valve, and controls the switching valve according to the defrosting requirements, so that when the variable temperature evaporator is defrosting, the other compartments can continue to cool normally according to the control logic, and maintain the temperature of each compartment is stable.

[0102] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-system refrigerator, comprising a refrigerator compartment (100), an ice-making compartment (200), an ultrafreezing compartment (300), and a variable temperature compartment (400), characterized in that, It also includes a variable-temperature evaporator (4) for providing cooling to the variable-temperature chamber (400), the variable-temperature evaporator (4) being mounted on the back of the superfreezing chamber (300).

2. The multi-system refrigerator according to claim 1, characterized in that, It also includes a refrigeration evaporator (1) for providing cooling capacity to the refrigeration compartment (100), an ice-making evaporator (2) for providing cooling capacity to the ice-making compartment (200), and a freezing evaporator (3) for providing cooling capacity to the superfreezing compartment (300); The refrigeration evaporator (1) is mounted on the back of the refrigeration compartment (100), the ice-making evaporator (2) is mounted on the back of the ice-making compartment (200), and the freezing evaporator (3) is mounted on the back of the superfreezing compartment (300).

3. The multi-system refrigerator according to claim 2, characterized in that, It also includes a machine room (500), in which at least a condenser (8) and a compressor (9) are assembled for forming a refrigeration circuit with the refrigeration evaporator (1), the ice-making evaporator (2), the freezing evaporator (3) and the variable temperature evaporator (4); In the refrigeration circuit, the refrigeration evaporator (1), the ice-making evaporator (2), the freezing evaporator (3), and the variable temperature evaporator (4) are connected in parallel via a switching valve (5).

4. The multi-system refrigerator according to claim 3, characterized in that the first end of the switching valve (5) is connected in series with the refrigeration evaporator (1) and then connected to the freezing evaporator (3); the second end of the switching valve (5) is connected in series with the ice-making evaporator (2) and then connected to the freezing evaporator (3); the third end of the switching valve (5) is connected in series with the variable temperature evaporator (4) and then connected to the freezing evaporator (3); the fourth end of the switching valve (5) is connected to the freezing evaporator (3); and the other end of the freezing evaporator (3) is sequentially connected to the compressor (9) and the condenser (8) and then returns to the fifth end of the switching valve (5).

5. The multi-system refrigerator according to claim 4, characterized in that, It also includes a refrigeration capillary tube (10) connected in series between the first end of the switching valve (5) and the refrigeration evaporator (1), an ice-making capillary tube (11) connected in series between the second end of the switching valve (5) and the ice-making evaporator (2), a variable temperature capillary tube (12) connected in series between the third end of the switching valve (5) and the variable temperature evaporator (4), and a freezing capillary tube (13) connected in series between the fourth end of the switching valve (5) and the freezing evaporator (3).

6. The multi-system refrigerator according to claim 5, characterized in that, It also includes a dryer filter (6) and an anti-condensation tube (7) connected in series between the fifth end of the switching valve (5) and the condenser (8).

7. The multi-system refrigerator according to claim 2, characterized in that, It also includes a refrigeration fan (14) disposed around the refrigeration evaporator (1), an ice-making fan (15) disposed around the ice-making evaporator (2), a refrigeration fan (16) disposed around the freezing evaporator (3), and a variable temperature fan (17) disposed around the variable temperature evaporator (4).

8. The multi-system refrigerator according to claim 5, characterized in that, When the refrigeration evaporator (3) has a refrigeration demand, the switching valve (5) controls the fourth end of the switching valve (5) to be turned on when the temperature in the refrigerator compartment (100), the ice-making compartment (200), and the variable temperature compartment (400) reaches the shutdown point.

9. The multi-system refrigerator according to claim 5, characterized in that, When the refrigerated evaporator (1) has a refrigeration demand, the first end of the switching valve (5) is turned on; When the ice-making evaporator (2) has a cooling demand, the second end of the switching valve (5) is turned on; When the variable temperature evaporator (4) has a cooling demand, the third end of the switching valve (5) is turned on.

10. A refrigeration system, characterized in that, The refrigeration system includes a multi-system refrigerator as described in any one of claims 1 to 9.

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