Refrigerator refrigeration system

Abstract

The invention discloses a refrigerator refrigeration system, and relates to the technical field of refrigerators. The invention comprises a compressor, a freezing anti-condensation tube, a condenser, a filter, an electric valve, a variable temperature capillary, a variable temperature evaporator, a refrigeration capillary, a refrigeration evaporator, a four-way pipe, a freezing evaporator, a freezing capillary, a first solenoid valve, and a second solenoid valve; the first solenoid valve comprises a port and a port b; the second solenoid valve comprises a port c and a port d; the compressor, the freezing anti-condensation tube, the condenser, the filter, the electric valve, the variable temperature capillary, the variable temperature evaporator, and the port b of the first solenoid valve are sequentially connected in series to form a loop. The invention adds two first solenoid valves and second solenoid valves with one inlet and two outlets on the basis of the refrigeration three-system in which the refrigeration evaporator and the variable temperature evaporator are connected in parallel and connected in series with the freezing evaporator, thereby changing the flow direction of the refrigerant, realizing independent defrosting of the variable temperature evaporator and the freezing evaporator, saving electric energy, and avoiding the temperature rise of the compartment.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerators, and in particular relates to a refrigerator refrigeration system. Background Art

[0002] In three-system refrigerators, the refrigeration, variable temperature, and freezing evaporators are generally connected in series and parallel. When the evaporator is defrosted, the freezing evaporator and the variable temperature evaporator are widely used to enter the defrosting mode at the same time. This simultaneous defrosting control method is simple and convenient, but from the perspective of refrigerator energy saving, the simultaneous defrosting control method has the following disadvantages:

[0003] 1. The degree of frost on the variable temperature evaporator and the refrigeration evaporator is different. When one of the evaporators needs to be defrosted, the other evaporator does not necessarily need to be defrosted, but will passively enter the defrost program, resulting in unnecessary waste of electricity.

[0004] 2. The degree of frost on the variable temperature evaporator and the freezing evaporator is different, so there is a sequence in the time points for ending defrosting. When one of the evaporators has finished defrosting, it is necessary to wait until the other evaporator has finished defrosting before the refrigerator can start refrigeration, resulting in more temperature recovery in the refrigerator compartment.

[0005] Therefore, a refrigerator refrigeration system needs to be studied to make up for the above shortcomings. Summary of the invention

[0006] The object of the present invention is to provide a refrigerator refrigeration system, which adds two first solenoid valves and second solenoid valves with one inlet and two outlets on the basis of a refrigeration three-system in which a refrigerating evaporator and a variable temperature evaporator are connected in parallel and in series with a freezing evaporator, thereby changing the flow direction of the refrigerant and realizing independent defrosting of the variable temperature evaporator and the freezing evaporator; and solves the problems of different frost degrees and defrosting times of the existing variable temperature evaporator and the freezing evaporator, and the waste of electric energy and the rise of compartment temperature during defrosting.

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention is a refrigerator refrigeration system, comprising a compressor, a freezing anti-condensation tube, a condenser, a filter, an electric valve, a variable temperature capillary tube, a variable temperature evaporator, a refrigeration capillary tube, a refrigeration evaporator, a four-way tube, a freezing evaporator, a freezing capillary tube, a first solenoid valve and a second solenoid valve; the first solenoid valve comprises a port and a b port; the second solenoid valve comprises a port and a d port;

[0009] The compressor, the freezing anti-condensation tube, the condenser, the filter, the electric valve, the temperature-variable capillary tube, the temperature-variable evaporator and the port b of the first solenoid valve are sequentially connected in series to form a loop;

[0010] The electric valve, the refrigeration capillary, the refrigeration evaporator, the four-way pipe, the d port of the second solenoid valve, the refrigeration evaporator and the inlet of the compressor are connected in series in sequence to form a branch;

[0011] The electric valve is connected to the port a of the first electromagnetic valve through a freezing capillary and a four-way pipe.

[0012] Furthermore, one relative pipe opening of the four-way pipe is respectively connected to the outlet of the refrigeration evaporator and the inlet of the second solenoid valve; the other relative pipe opening of the four-way pipe is respectively connected to the outlet of the freezing capillary and the port a of the first solenoid valve.

[0013] The present invention has the following beneficial effects:

[0014] 1. The present invention is based on a refrigeration three-system in which a refrigeration evaporator and a variable temperature evaporator are connected in parallel and in series with a freezing evaporator. A first solenoid valve with one inlet and two outlets is added to the terminal outlet of the variable temperature evaporator, and a second solenoid valve with one inlet and two outlets is added to the front inlet of the freezing evaporator. The flow direction of the refrigerant is changed by changing the actions of the first solenoid valve and the second solenoid valve, thereby realizing independent defrosting of the variable temperature evaporator and the freezing evaporator, saving electric energy, and avoiding the temperature rise of the compartment.

[0015] 2. When the variable temperature room is defrosted, the first solenoid valve keeps port a unobstructed, and the second solenoid valve keeps port c unobstructed; the refrigerant flows from the compressor to the electric valve through the freezing anti-condensation tube, the condenser and the filter in sequence; under the action of the electric valve, the freezer compartment can be refrigerated alone or the freezer compartment and the refrigeration compartment can be refrigerated at the same time; the problem of power waste and temperature rise in the refrigerator compartment caused by different defrosting times of the freezer compartment and the variable temperature room is avoided.

[0016] 3. When the freezer compartment is defrosted, the first solenoid valve keeps port b unobstructed and the second solenoid valve keeps port d unobstructed; the refrigerant flows from the compressor to the electric valve through the freezing anti-condensation tube, the condenser and the filter in sequence; under the action of the electric valve, the variable temperature chamber can be refrigerated alone or the variable temperature chamber and the cold storage compartment can be refrigerated at the same time, avoiding the problem of power waste and temperature rise in the refrigerator compartment due to different defrosting times.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is the principle diagram of the refrigeration system of the present invention;

[0020] Figure 2 The flow diagram of the refrigerant during defrosting in the variable temperature room of the present invention;

[0021] Figure 3 The figure is a flow diagram of the refrigerant when the freezer compartment of the present invention is defrosted;

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1- compressor, 2- refrigeration anti-condensation tube, 3- condenser, 4- filter, 5- electric valve, 6- variable temperature capillary, 7- variable temperature evaporator, 8- first solenoid valve, 9- refrigeration capillary, 10- refrigeration evaporator, 11- four-way pipe, 12- second solenoid valve, 13- refrigeration evaporator, 14- refrigeration capillary. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-3 As shown, the present invention is a refrigerator refrigeration system, including a compressor 1, a freezing anti-condensation tube 2, a condenser 3, a filter 4, an electric valve 5, a variable temperature capillary 6, a variable temperature evaporator 7, a refrigeration capillary 9, a refrigeration evaporator 10, a four-way pipe 11, a freezing evaporator 13, a freezing capillary 14, a first solenoid valve 8 and a second solenoid valve 12; the first solenoid valve 8 includes a port and a b port; the second solenoid valve 12 includes a port and a d port; the first solenoid valve 8 and the second solenoid valve 12 are both one-inlet and two-outlet solenoid valves;

[0026] The compressor 1, the freezing anti-condensation tube 2, the condenser 3, the filter 4, the electric valve 5, the temperature-variable capillary 6, the temperature-variable evaporator 7 and the port b of the first solenoid valve 8 are sequentially connected in series to form a loop;

[0027] The electric valve 5, the refrigeration capillary 9, the refrigeration evaporator 10, the four-way pipe 11, the port d of the second electromagnetic valve 12, the freezing evaporator 13 and the inlet of the compressor 1 are connected in series in sequence to form a branch;

[0028] The electric valve 5 is connected to the port a of the first electromagnetic valve 8 through the freezing capillary tube 14 and the four-way pipe 11.

[0029] The electric valve 5 is a one-inlet and three-outlet valve, so it is possible to control from which outlet the refrigerant passing through the inside thereof flows out.

[0030] Among them, one relative pipe opening of the four-way pipe 11 is respectively connected to the outlet of the refrigeration evaporator 10 and the inlet of the second solenoid valve 12; the other relative pipe opening of the four-way pipe 11 is respectively connected to the outlet of the freezing capillary 14 and the a port of the first solenoid valve 8.

[0031] In addition, the present invention can use multiple stop valves or one-way valves to replace the above technical solution; however, the number of valve components is large, and compared with the present invention, it does not have cost and process advantages.

[0032] A specific application of this embodiment is:

[0033] When the frost degree of the variable temperature evaporator and the freezing evaporator is different, the variable temperature evaporator or the freezing evaporator needs to be defrosted, while the other freezing evaporator or the variable temperature evaporator does not necessarily need to be defrosted. If the variable temperature evaporator and the freezing evaporator do not have the function of defrosting or refrigerating separately, this will cause the variable temperature evaporator or the freezing evaporator to defrost while the other freezing evaporator or the variable temperature evaporator enters the passive defrosting state, which will cause a waste of electric energy;

[0034] When the defrosting time of the variable temperature evaporator and the refrigerated evaporator is different, the defrosting of the variable temperature evaporator or the refrigerated evaporator has ended, and the refrigerated evaporator or the variable temperature evaporator is still defrosting, resulting in inconsistent time nodes for the end of the variable temperature evaporator and the refrigerated evaporator, and there is a sequential relationship, which will cause the temperature of the compartment to rise;

[0035] In view of the above-mentioned shortcomings, the present invention adds a first solenoid valve 8 with one inlet and two outlets at the end outlet of the variable temperature evaporator, and adds a second solenoid valve 12 with one inlet and two outlets at the front inlet of the freezing evaporator on the basis of a refrigeration three-system in which a refrigeration evaporator and a variable temperature evaporator are connected in parallel and in series with a freezing evaporator. The flow direction of the refrigerant is changed by changing the actions of the electric valve 5, the first solenoid valve 8 and the second solenoid valve 12, thereby realizing independent defrosting of the variable temperature evaporator 7 and the freezing evaporator 13, saving electric energy and avoiding the temperature rise of the compartment.

[0036] The present invention realizes independent defrosting of the freezing evaporator and the temperature-variable evaporator by switching the outlets of the first solenoid valve 8 and the second solenoid valve 12. The control rules are as follows:

[0037] like Figure 2As shown, when the temperature is changed to room temperature for defrosting, the first solenoid valve 8 keeps port a unobstructed, and the second solenoid valve 12 keeps port c unobstructed; the refrigerant flows from the compressor 1 to the electric valve 5 through the freezing anti-condensation tube 2, the condenser 3 and the filter 4 in sequence; and under the action of the electric valve 5, the refrigerant will flow to the refrigeration capillary 9 and the freezing capillary 14 respectively; one path of the refrigerant flows to the compressor 1 through the refrigeration capillary 9, the refrigeration evaporator 10, the four-way pipe 11, the port c of the second solenoid valve 12 and the freezing evaporator 13, so as to realize the refrigeration of the refrigeration room; the other path flows to the compressor 1 through the freezing capillary 14, the four-way pipe 11, the port c of the second solenoid valve 12 and the freezing evaporator 13, and this The refrigerant in the circuit only flows through the freezing capillary and the freezing chamber, and cooperates with other equipment, such as a freezing fan, to realize refrigeration of the freezing chamber or not; in addition, under the action of the electric valve 5, the refrigerant can only go through the freezing capillary 14, and the refrigerant flows to the compressor 1 through the freezing capillary 14, the four-way pipe 11, the C port of the second solenoid valve 12 and the freezing evaporator 13 to realize refrigeration of the freezing chamber; therefore, when the variable temperature room is defrosted, the refrigeration of the cold storage room and the freezing chamber or the refrigeration of the freezing chamber alone can be realized, and the defrosting of the variable temperature evaporator 7 will not be affected, so as to avoid the waste of electric energy and the phenomenon of rising temperature of the refrigerator compartment due to different defrosting times of the two.

[0038] like Figure 3 As shown, when the present invention defrosts the freezing chamber, the first solenoid valve 8 keeps the port b unblocked and the second solenoid valve 12 keeps the port d unblocked; the refrigerant flows from the compressor 1 to the electric valve 5 through the freezing anti-condensation tube 2, the condenser 3 and the filter 4 in sequence; and under the action of the electric valve 5, the refrigerant will flow to the variable temperature capillary 6 and the refrigeration capillary 9 respectively; one path of refrigerant flows to the compressor 1 through the variable temperature capillary 6, the variable temperature evaporator 7 and the port b of the first solenoid valve 8 to realize the refrigeration of the variable temperature chamber; the other path of refrigerant flows through the refrigeration capillary 9, the refrigeration evaporator 10, the cross-tube 11, the second solenoid valve 12 d port, the variable temperature evaporator 7 and the b port of the first solenoid valve 8, and flows to the compressor 1 to realize the refrigeration of the refrigerating chamber; in addition, under the action of the electric valve 5, the refrigerant can only flow to the variable temperature capillary 6, that is, the refrigerant flows to the compressor 1 through the variable temperature capillary 6, the variable temperature evaporator 7 and the b port of the first solenoid valve 8 to realize the refrigeration of the variable temperature chamber; therefore, when the freezing chamber is defrosted, the variable temperature chamber can be refrigerated, and the variable temperature chamber and the refrigerating chamber can be refrigerated at the same time without affecting the defrosting of the freezing evaporator chamber; thus avoiding the problem of power waste and the temperature rise of the refrigerator compartment due to different defrosting times of the two chambers;

[0039] The above control rules ensure that when the variable temperature evaporator 7 is defrosted, the refrigeration of the freezer compartment or the simultaneous refrigeration of the refrigerator compartment and the freezer compartment is not affected; when the freezing evaporator 13 is defrosted, the refrigeration of the variable temperature chamber or the simultaneous refrigeration of the variable temperature chamber and the refrigerator compartment is not affected; and after the defrosting is completed, the compartment can enter the refrigeration mode, and the problem of excessive temperature recovery in the compartment due to waiting for the defrosting of the evaporators in other compartments to be completed will not be caused.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A refrigerator refrigeration system, comprising a compressor (1), a freezing anti-condensation tube (2), a condenser (3), a filter (4), an electric valve (5), a variable temperature capillary tube (6), a variable temperature evaporator (7), a refrigeration capillary tube (9), a refrigeration evaporator (10), a four-way tube (11), a freezing evaporator (13) and a freezing capillary tube (14); characterized in that: It also includes a first solenoid valve (8) and a second solenoid valve (12); the first solenoid valve (8) includes a port a and a port b; the second solenoid valve (12) includes a port c and a port d; The compressor (1), the freezing anti-condensation tube (2), the condenser (3), the filter (4), the electric valve (5), the variable temperature capillary (6), the variable temperature evaporator (7) and the port b of the first solenoid valve (8) are sequentially connected in series to form a loop; The electric valve (5), the refrigeration capillary (9), the refrigeration evaporator (10), the four-way pipe (11), the port C of the second solenoid valve (12), the refrigeration evaporator (13) and the inlet of the compressor (1) are connected in series in sequence to form a branch; The electric valve (5) is connected to the port a of the first electromagnetic valve (8) through the freezing capillary (14) and the four-way pipe (11); One relative pipe opening of the four-way pipe (11) is respectively connected to the outlet of the refrigeration evaporator (10) and the inlet of the second solenoid valve (12); the other relative pipe opening of the four-way pipe (11) is respectively connected to the outlet of the freezing capillary (14) and the port a of the first solenoid valve (8).

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