Refrigeration and defrosting systems and refrigeration equipment

Abstract

The present invention discloses a refrigeration and defrosting system and a refrigeration device. The refrigeration and defrosting system comprises: a refrigeration circuit, which is formed by sequentially connecting a compressor, a condenser, a throttling device and a main evaporator component; an auxiliary evaporator component, which is used to provide coldness to a compartment where the main evaporator component is located, and the auxiliary evaporator component is arranged in parallel with the main evaporator component; and a switching device, which connects the auxiliary evaporator component to the refrigeration circuit when the main evaporator component is defrosted. The present invention uses the auxiliary evaporator component to provide coldness to the compartment where the main evaporator component is located, prevents the compartment temperature from rising suddenly during the defrosting period of the main evaporator component, and effectively maintains the compartment temperature stable.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a refrigeration and defrosting system and a refrigeration device for maintaining normal refrigeration during defrosting. Background Art

[0002] Refrigeration and defrosting systems are generally used in refrigeration equipment. Refrigerators are common refrigeration equipment. At present, air-cooled frost-free refrigerators dominate the refrigerator market. Air-cooled frost-free refrigerators have the advantage of automatic defrosting, while the freezer compartment of air-cooled single-system refrigerators is connected to other compartments through air ducts, which will cause the disadvantage of food odor contamination. Therefore, the birth of air-cooled dual-system or multi-system refrigerators solves the problem of food odor contamination. When the freezer compartment of traditional air-cooled dual-system refrigerators needs to be defrosted, the refrigeration compartment cannot be refrigerated normally, or when the refrigeration compartment and the freezer compartment are defrosted, the temperature of the compartments will rise sharply due to the operation of the defrost heater, which is not conducive to food storage.

[0003] The patent with publication number CN111649516A discloses a refrigerator, which has a defrosting structure including a first evaporator, a second evaporator, a first fan motor, a second fan motor, a first heater, and a second heater. When the first evaporator meets the defrosting conditions, the compressor, the first fan, and the second heater stop working, and the second fan and the first heater work. While the first evaporator is working, the residual cold of the second evaporator can be used to refrigerate the compartment, and the defrosting of the second evaporator is the same. However, in this method, the first evaporator and the second evaporator are connected in series, and the compressor needs to be shut down throughout the process. When the first evaporator is defrosted, the second evaporator cannot be refrigerated normally. When the first evaporator defrosts for a long time, the residual cold of the second evaporator is not enough to reduce the increase in the compartment temperature.

[0004] Therefore, how to design a refrigeration and defrost system that maintains normal refrigeration during defrost is a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0005] In order to solve the defect of sudden rise in compartment temperature during defrosting in the prior art, the present invention proposes a refrigeration defrost system and a refrigeration device. The refrigeration defrost system connects an auxiliary evaporator component to the refrigeration circuit when the main evaporator component is defrosted, and uses the auxiliary evaporator component to provide cooling to the compartment where the main evaporator component is located.

[0006] The technical solution adopted by the present invention is to design a refrigeration and defrosting system, including:

[0007] A refrigeration circuit is formed by sequentially connecting a compressor, a condenser, a throttling device and a main evaporator assembly;

[0008] An auxiliary evaporator assembly, which is used to provide cooling capacity to the compartment where the main evaporator assembly is located, and the auxiliary evaporator assembly is arranged in parallel with the main evaporator assembly;

[0009] A switching device connects the auxiliary evaporator assembly to the refrigeration circuit when the main evaporator assembly is defrosted.

[0010] Preferably, the switching device has an inlet and at least two outlets, the inlet of the switching device is connected to the outlet of the condenser, the first outlet of the switching device is connected to the main evaporator assembly, the second outlet of the switching device is connected to the auxiliary evaporator assembly, and the switching device opens the second outlet and closes the first outlet when the main evaporator assembly is defrosted.

[0011] Preferably, the main evaporator assembly comprises: a first main evaporator, and a second main evaporator connected in series between the first main evaporator and the first outlet.

[0012] Preferably, the auxiliary evaporator assembly comprises: a first auxiliary evaporator for providing cooling to the compartment where the first main evaporator is located, a second auxiliary evaporator for providing cooling to the compartment where the second main evaporator is located, and the first auxiliary evaporator and the second auxiliary evaporator are connected in series.

[0013] Preferably, the switching device is provided with a third outlet, and the inlet of the first main evaporator is connected to the third outlet.

[0014] Among them, the on / off status of each outlet in the switching device is as follows:

[0015] When the first main evaporator is defrosted, the second outlet is opened, and the third outlet and the first outlet are closed;

[0016] and / or when both the first main evaporator and the second main evaporator are defrosted, the second outlet is opened, and the third outlet and the first outlet are closed;

[0017] and / or when the second main evaporator is defrosting and the first main evaporator is refrigerating, the second outlet and the third outlet are both opened and the first outlet is closed;

[0018] and / or when only the first main evaporator is cooling, the third outlet is opened, and the first outlet and the second outlet are both closed;

[0019] and / or when only the second main evaporator is cooling, the first outlet is opened, and the second outlet and the third outlet are closed;

[0020] And / or when both the first main evaporator and the second main evaporator are cooling, the first outlet is opened and the second outlet is closed.

[0021] Preferably, the refrigeration defrost system includes: a defrost heating device that provides heat to the main evaporator assembly for defrosting, and the defrost heating device includes: heaters that are the same in number and correspond one to one to the main evaporators in the main evaporator assembly, and the heaters individually provide heat to their corresponding main evaporators.

[0022] Preferably, the throttling device includes: throttling elements having the same number as and one-to-one corresponding to the outlets of the switching device, and the refrigerant flowing out of each outlet passes through its corresponding throttling element.

[0023] Preferably, an anti-condensation tube is connected in series between the outlet of the condenser and the inlet of the switching device.

[0024] Preferably, the main evaporators in the main evaporator assembly are all air-cooled evaporators, and the auxiliary evaporators in the auxiliary evaporator assembly are all direct-cooled evaporators.

[0025] The present invention also proposes a refrigeration device using the above refrigeration and defrosting system, and the refrigeration device may be a refrigerator.

[0026] Compared with the prior art, the present invention has the following technical effects:

[0027] 1. Design an auxiliary evaporator assembly connected in parallel with the main evaporator assembly. When the main evaporator assembly is defrosted, connect the auxiliary evaporator to the refrigeration circuit. Use the auxiliary evaporator assembly to provide cooling capacity to the compartment where the main evaporator assembly is located, so that the temperature of the compartment is stable.

[0028] 2. When the first main evaporator is defrosted alone, the second outlet is opened and the first outlet is closed, and the second main evaporator can refrigerate the compartment through the second auxiliary evaporator;

[0029] 3. Design a third outlet connected to the first main evaporator. When the second main evaporator is defrosted alone, open the second and third outlets, and the first main evaporator can refrigerate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0031] Figure 1 It is a connection diagram of the refrigeration and defrosting system in the present invention. DETAILED DESCRIPTION

[0032] like Figure 1As shown, the refrigeration and defrosting system proposed in the present invention is commonly used in refrigeration equipment such as refrigerators, which includes: a refrigeration circuit, an auxiliary evaporator component and a switching device 5. The refrigeration circuit is formed by connecting a compressor 1, a condenser 2, a throttling device and a main evaporator component in sequence. The refrigerant circulates in the refrigeration circuit. The auxiliary evaporator component is arranged in parallel with the main evaporator component. When the auxiliary evaporator component is working, it can provide cooling capacity to the compartment where the main evaporator component is located. The switching device 5 is installed in the refrigeration circuit, which is connected to the main evaporator component and the auxiliary evaporator component. When the main evaporator component is defrosted, the switching device 5 connects the auxiliary evaporator component to the refrigeration circuit, and uses the auxiliary evaporator component to provide cooling capacity to the compartment where the main evaporator component is located, so as to prevent the compartment temperature from rising suddenly during the defrosting of the main evaporator component, and effectively maintain the compartment temperature stable.

[0033] Specifically, the switching device 5 has an inlet and at least two outlets, the inlet of the switching device is connected to the outlet of the condenser 2, the first outlet of the switching device 5 is connected to the main evaporator assembly, the second outlet of the switching device 5 is connected to the auxiliary evaporator assembly, and the switching device 5 opens the second outlet and closes the first outlet when the main evaporator assembly is defrosted. Preferably, an anti-condensation tube 3 is connected in series between the outlet of the condenser 2 and the inlet of the switching device 5, a drying filter 4 is connected in series between the anti-condensation tube 3 and the inlet of the switching device 5, the air intake of the compressor 1 is connected to the liquid reservoir 13, and the outlet of the main evaporator assembly and the outlet of the auxiliary evaporator assembly are both connected to the inlet of the liquid reservoir 13.

[0034] In a preferred embodiment, the main evaporator assembly includes: a first main evaporator 9, a second main evaporator 10 connected in series between the first main evaporator 9 and the first outlet, and the auxiliary evaporator assembly includes: a first auxiliary evaporator 12 for providing cooling to the compartment where the first main evaporator 9 is located, and a second auxiliary evaporator 11 for providing cooling to the compartment where the second main evaporator 10 is located, and the second auxiliary evaporator 11 is connected in series between the first auxiliary evaporator 12 and the second outlet.

[0035] Preferably, the switching device 5 is provided with a third outlet, and the inlet of the first main evaporator 9 is connected to the third outlet. The switching device 5 includes throttling elements which are the same in number and one-to-one corresponding to the outlets of the switching device. The refrigerant flowing out of each outlet passes through its corresponding throttling element. The first outlet is connected in series with the first throttling element 7, the second outlet is connected in series with the second throttling element 8, and the third outlet is connected in series with the third throttling element 6.

[0036] The switching device 5 can be a switching valve, which can be connected to the control of the refrigeration equipment. The controller adjusts the on-off state of the switching device according to the working state of the main evaporator component. Under different working states of the main evaporator component, the on-off states of each outlet of the switching device 5 are as follows:

[0037] When the first main evaporator 9 is defrosted, the second outlet is opened, the third outlet and the first outlet are closed, and the flow path of the refrigerant in the refrigeration circuit is the condenser 2, the anti-condensation tube 3, the drying filter 4, the switching device 5, the second throttling element 8, the second auxiliary evaporator 11, the first auxiliary evaporator 12, the liquid storage 13, and the compressor 1;

[0038] When the first main evaporator 9 and the second main evaporator 10 are both defrosted, the second outlet is opened, the third outlet and the first outlet are both closed, and the flow path of the refrigerant in the refrigeration circuit is the condenser 2, the anti-condensation tube 3, the drying filter 4, the switching device 5, the second throttling element 8, the second auxiliary evaporator 11, the first auxiliary evaporator 12, the liquid storage 13, and the compressor 1;

[0039] When the second main evaporator 10 is defrosting and the first main evaporator 9 is refrigerating, the second outlet and the third outlet are both opened and the first outlet is closed. There are two flow paths of the refrigerant in the refrigeration circuit. The first path is the condenser 2, the anti-condensation tube 3, the drying filter 4, the switching device 5, the second throttling element 8, the second auxiliary evaporator 11, the first auxiliary evaporator 12, the liquid storage 13, and the compressor 1. The second path is the condenser 2, the anti-condensation tube 3, the drying filter 4, the switching device 5, the third throttling element 6, the first main evaporator 9, the liquid storage 13, and the compressor 1.

[0040] When only the first main evaporator 9 is refrigerating, the third outlet is opened, the first outlet and the second outlet are both closed, and the flow path of the refrigerant in the refrigeration circuit is the condenser 2, the anti-condensation tube 3, the drying filter 4, the switching device 5, the third throttling element 6, the first main evaporator 9, the liquid storage 13, and the compressor 1;

[0041] When only the second main evaporator 10 is refrigerating, the first outlet is opened, the second outlet and the third outlet are closed, and the flow path of the refrigerant in the refrigeration circuit is the condenser 2, the anti-condensation tube 3, the drying filter 4, the switching device 5, the first throttling element 7, the second main evaporator 10, the first main evaporator 9, the liquid storage 13, and the compressor 1;

[0042] When the first main evaporator 9 and the second main evaporator 10 are both cooling, the first outlet is opened and the second outlet is closed. Whether the third outlet is opened is determined according to the cooling capacity demand of the compartment where the first main evaporator 9 is located. The flow path of the refrigerant in the refrigeration circuit is the condenser 2, the anti-condensation tube 3, the drying filter 4, the switching device 5, the first throttling element 7, the second main evaporator 10, the first main evaporator 9, the liquid storage tank 13, and the compressor 1.

[0043] In one embodiment provided by the present invention, the refrigeration defrost system further includes: a defrost heating device for providing heat to the main evaporator assembly for defrosting, the defrost heating device including: heaters having the same number and one-to-one correspondence as the main evaporators in the main evaporator assembly, the heaters individually providing heat to the corresponding main evaporators for defrosting. Of course, the main evaporator assembly may also be defrosted in other ways, which is not limited by the present invention.

[0044] It should be noted that the main evaporators in the main evaporator assembly are all air-cooled evaporators, and the auxiliary evaporators in the auxiliary evaporator assembly are all direct-cooled evaporators. When the refrigeration and defrosting system is used in a refrigerator, the first main evaporator 9 in the main evaporator assembly is the main evaporator of the freezing chamber, the second main evaporator 10 is the main evaporator of the refrigerating chamber, the first auxiliary evaporator 12 in the auxiliary evaporator assembly is the auxiliary evaporator of the freezing chamber, and the second auxiliary evaporator 11 is the auxiliary evaporator of the refrigerating chamber.

[0045] The present invention adds a direct cooling evaporator to the refrigerating compartment and the freezing compartment respectively. The two direct cooling evaporators are connected in series. During the defrosting period of the compartments, a switching device is actuated to allow the refrigerant to flow into the direct cooling evaporator, so that the compartments can be defrosted and cooled at the same time, and the refrigerating compartment can be cooled normally when the freezing compartment is defrosted, thereby solving the problem of sudden rise in room temperature during defrosting and the problem that the refrigerating compartment cannot be cooled normally when the freezing compartment is defrosted.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Refrigeration and defrosting system, characterized in that: include: A refrigeration circuit is formed by sequentially connecting a compressor, a condenser, a throttling device and a main evaporator assembly; An auxiliary evaporator assembly, which is used to provide cooling to the compartment where the main evaporator assembly is located, and the auxiliary evaporator assembly is arranged in parallel with the main evaporator assembly; a switching device for connecting the auxiliary evaporator assembly to the refrigeration circuit when the main evaporator assembly is defrosted; The switching device has an inlet and at least two outlets, the inlet of the switching device is connected to the outlet of the condenser, the first outlet of the switching device is connected to the main evaporator component, and the second outlet of the switching device is connected to the auxiliary evaporator component; The main evaporator assembly comprises: a first main evaporator, and a second main evaporator connected in series between the first main evaporator and the first outlet; The auxiliary evaporator assembly comprises: a first auxiliary evaporator for providing cooling to the compartment where the first main evaporator is located, and a second auxiliary evaporator for providing cooling to the compartment where the second main evaporator is located, wherein the first auxiliary evaporator and the second auxiliary evaporator are connected in series; The switching device is provided with a third outlet, and the inlet of the first main evaporator is connected to the third outlet; The first main evaporator is a freezing chamber main evaporator, and the second main evaporator is a refrigerating chamber main evaporator.

2. The refrigeration and defrosting system according to claim 1, characterized in that: The switching device opens the second outlet and closes the first outlet when the main evaporator assembly is defrosted.

3. The refrigeration and defrosting system according to claim 1, characterized in that: When the first main evaporator is defrosted, the second outlet is opened, and the third outlet and the first outlet are both closed; and / or when both the first main evaporator and the second main evaporator are defrosted, the second outlet is opened, and the third outlet and the first outlet are closed; and / or when the second main evaporator is defrosting and the first main evaporator is refrigerating, the second outlet and the third outlet are both opened and the first outlet is closed; and / or when only the first main evaporator is refrigerating, the third outlet is opened, and the first outlet and the second outlet are both closed; and / or when only the second main evaporator is refrigerating, the first outlet is opened, and the second outlet and the third outlet are closed; And / or when both the first main evaporator and the second main evaporator are cooling, the first outlet is opened and the second outlet is closed.

4. The refrigeration and defrosting system according to any one of claims 1 to 3, characterized in that: The refrigeration and defrosting system comprises: a defrosting heating device for providing heat to the main evaporator assembly for defrosting.

5. The refrigeration and defrosting system according to any one of claims 1 to 3, characterized in that: The throttling device includes: throttling elements having the same number as the outlets of the switching device and corresponding to each other, and the refrigerant flowing out of each outlet passes through the corresponding throttling element.

6. The refrigeration and defrosting system according to any one of claims 1 to 3, characterized in that: An anti-condensation tube is connected in series between the outlet of the condenser and the inlet of the switching device.

7. The refrigeration and defrosting system according to any one of claims 1 to 3, characterized in that: The main evaporators in the main evaporator assembly are all air-cooled evaporators.

8. The refrigeration and defrosting system according to any one of claims 1 to 3, characterized in that: The auxiliary evaporators in the auxiliary evaporator assembly are all direct cooling evaporators.

9. Refrigeration equipment, characterized in that The refrigeration equipment adopts the refrigeration and defrosting system according to any one of claims 1 to 8.

10. The refrigeration equipment according to claim 9, characterized in that: The refrigeration equipment is a refrigerator.

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