CN113237280A

CN113237280A - A kind of refrigerator

Info

Publication number: CN113237280A
Application number: CN202110598791.2A
Authority: CN
Inventors: 杨春华; 陈桂生; 刘玉民; 杨金英
Original assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Current assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-08-10

Abstract

The invention relates to the technical field of household appliances and discloses a refrigerator.A ice making device is provided with two refrigeration evaporation tubes; the refrigerant transportation loop is provided with a refrigerant discharge end and a refrigerant inlet end, and the outlet ends of the two refrigeration evaporation tubes are connected with the refrigerant inlet end; two ends of the freezing and refrigerating circuit are respectively connected with a refrigerant discharge end and an inlet end of the refrigerating evaporation pipe, one end of the ice-making and refrigerating circuit is connected with the refrigerant discharge end, and the other end of the ice-making and refrigerating circuit is connected with the inlet end of one of the refrigerating evaporation pipes; when the switching valve group is at a first position, the refrigerant discharge ends are respectively communicated with the freezing refrigeration circuit and the ice-making refrigeration circuit; when the switching valve group is at the second position, the refrigerant discharge end of the refrigerant transportation circuit is disconnected with the ice-making refrigeration circuit; when the switching valve block is in the third position, the refrigerant discharge end of the refrigerant transport circuit is disconnected from the refrigeration circuit. The refrigerator adopting the technical scheme of the invention can more efficiently make ice and ensure that the temperature of the freezing chamber is accurately controlled.

Description

A kind of refrigerator

Technical Field

The invention relates to the technical field of household appliances, in particular to a refrigerator.

Background

Currently, ice making devices used in refrigerators are classified into an air cooling type and a direct cooling type according to a refrigeration method, wherein the air cooling type ice making devices have been widely used and have a disadvantage of general ice making efficiency. The direct cooling type ice making device adopts the refrigeration evaporating pipe to directly contact with the metal ice making grid for refrigeration, has higher efficiency compared with the air cooling type ice making device, and has the defects of relatively complex structure and higher assembly requirement.

The conventional direct-cooling ice making device adopts a single-inlet single-outlet serial type refrigeration method to carry out the passive refrigeration by matching with the refrigeration requirements of each chamber of the refrigerator. Because the direct-cooling ice-making device adopts passive refrigeration, the ice-making device and a refrigeration loop of a freezing chamber are generally in series connection, when ice making is started, the temperature of the freezing chamber cannot be accurately controlled, the freezing chamber can be severely cooled during ice making, and particularly the temperature of the freezing chamber can reach minus 30 ℃. The freezing chamber is severely cold and can also lead to increased defrosting time of the freezing evaporator. When the freezing evaporator defrosts, the ice making device must stop making ice, and the defrosting process is generally about 40 minutes, so that more efficient full-time ice making cannot be realized, and the ice making efficiency is seriously influenced.

Disclosure of Invention

The purpose of the invention is: provided is a refrigerator which can realize more efficient ice making, and can disconnect a freezing circuit, so that the temperature of a freezing chamber is accurately controlled, the freezing chamber is not passively refrigerated, and the problem of serious partial cooling does not occur. When the freezing evaporator defrosts, the ice making device can still continuously operate to make ice, the whole refrigeration system does not need to stop working, the ice making capacity can be effectively improved, and the purpose of saving energy is achieved by selecting the dominant loop when the ice is full or low in demand.

In order to achieve the above object, the present invention provides a refrigerator including an ice making device, a refrigerant transporting circuit, a freezing and refrigerating circuit, an ice making and refrigerating circuit, and a switching valve group,

the ice-making device is provided with at least two refrigeration evaporation tubes which are independently arranged;

the refrigerant transportation loop is provided with a refrigerant discharge end and a refrigerant inlet end, and the outlet ends of the two refrigeration evaporation tubes are connected with the refrigerant inlet end;

one end of the freezing and refrigerating circuit is connected with the refrigerant discharge end, and the other end of the freezing and refrigerating circuit is connected with the inlet end of one of the refrigerating evaporation tubes and is used for refrigerating the ice making device;

one end of the ice-making refrigeration loop is connected with the refrigerant discharge end, and the other end of the ice-making refrigeration loop is connected with the inlet end of one of the refrigeration evaporation tubes and used for refrigerating the ice-making device;

the switching valve group is arranged at the upstream ends of the freezing refrigeration circuit and the ice-making refrigeration circuit and can be switched among a first position, a second position and a third position;

when the switching valve block is in a first position, the refrigerant discharge ends of the refrigerant transportation circuit are respectively communicated with the freezing refrigeration circuit and the ice-making refrigeration circuit;

when the switching valve block is in the second position, a refrigerant discharge end of the refrigerant transport circuit is communicated with the freezing refrigeration circuit, and a refrigerant discharge end of the refrigerant transport circuit is disconnected from the ice making refrigeration circuit;

when the switching valve block is in a third position, a refrigerant discharge end of the refrigerant transportation circuit is communicated with the ice-making refrigeration circuit, and the refrigerant discharge end of the refrigerant transportation circuit is disconnected from the freezing refrigeration circuit.

In some embodiments of the present application, the refrigerator further comprises a controller electrically connected to the switching valve block, the controller being configured to:

when the number of the required ice blocks is larger than a preset value, the refrigerant discharge end of the refrigerant transportation loop is respectively communicated with the freezing refrigeration loop and the ice making refrigeration loop;

when the number of the required ice blocks is smaller than a preset value, a refrigerant discharge end of the refrigerant transportation circuit is communicated with the freezing refrigeration circuit, and the refrigerant discharge end of the refrigerant transportation circuit is disconnected with the ice-making refrigeration circuit;

when an evaporator on the freezing refrigeration circuit needs defrosting, a refrigerant discharge end of the refrigerant transportation circuit is communicated with the ice-making refrigeration circuit, and the refrigerant discharge end of the refrigerant transportation circuit is disconnected with the freezing refrigeration circuit.

In some embodiments of the present application, when the freezer compartment reaches a preset minimum temperature, the refrigerant discharge end of the refrigerant transport circuit is in communication with the ice-making refrigeration circuit and the refrigerant discharge end of the refrigerant transport circuit is disconnected from the freezer refrigeration circuit.

In some embodiments of the present application, a freezing throttling device and a freezing evaporator are sequentially arranged on the freezing refrigeration loop along the flow direction of the refrigerant, the freezing throttling device is connected with the refrigerant discharge end, and the freezing evaporator is connected with one of the refrigeration evaporation pipes;

and an ice-making throttling device is arranged on the ice-making refrigeration loop, one end of the ice-making throttling device is connected with the refrigerant discharge end, and the other end of the ice-making throttling device is connected with one of the refrigeration evaporation pipes.

In some embodiments of the present application, the ice making device includes an ice maker, a first refrigeration evaporating pipe, a second refrigeration evaporating pipe, an ice tray, a water filling device, a turnover mechanism, and a heater,

the ice maker is provided with an ice making chamber;

the first refrigeration evaporation pipe is arranged in the ice making chamber along the extension direction of the ice making chamber, one end of the first refrigeration evaporation pipe is connected with the freezing evaporator, and the other end of the first refrigeration evaporation pipe is connected with the refrigerant inlet end;

the second refrigeration evaporation pipe is arranged in the ice making chamber along the extension direction of the ice making chamber, one end of the second refrigeration evaporation pipe is connected with the ice making refrigeration loop, and the other end of the second refrigeration evaporation pipe is connected with the refrigerant inlet end;

the ice tray is arranged in the ice making chamber and is positioned above the first refrigeration evaporation pipe and the second refrigeration evaporation pipe, and a plurality of accommodating grooves for forming ice blocks are formed in the ice tray;

the water injection device is used for supplying water to the ice grids;

the turnover mechanism is arranged in the ice making chamber and used for enabling the ice grids to turn over;

the heater is arranged in the ice making chamber and used for heating the ice tray.

In some embodiments of the present application, the turnover mechanism includes an ice-turning rod and a motor, the ice-turning rod is disposed above the ice tray;

the motor is connected with the ice turning rod and used for driving the ice turning rod to rotate so as to turn the ice tray.

In some embodiments of the present application, the ice making device further includes an ice making fan disposed in the ice making chamber, the ice making fan being disposed opposite to the refrigeration evaporating pipe.

In some embodiments of this application, the refrigerator still includes fresh-keeping refrigeration circuit, fresh-keeping refrigeration circuit sets up the low reaches end of switching valves, fresh-keeping refrigeration circuit goes up to be equipped with fresh-keeping throttling arrangement and fresh-keeping evaporimeter along the flow direction of refrigerant in proper order, fresh-keeping refrigeration circuit's one end with the switching valves links to each other, fresh-keeping refrigeration circuit's the other end with freezing refrigeration circuit's first fulcrum links to each other.

In some embodiments of the present application, the first branch point is located between the refrigeration throttling device and the refrigeration evaporator.

In some embodiments of the present application, the refrigerator further comprises a preservation chamber, the freeze evaporator for maintaining a temperature within the preservation chamber not to exceed a preset value.

Compared with the prior art, the refrigerator provided by the embodiment of the invention has the beneficial effects that:

according to the refrigerator provided by the embodiment of the invention, the ice maker with double channels is arranged, and the ice maker refrigerates by two loops, so that the freezing loop can be disconnected, the temperature of the freezing chamber is accurately controlled, the freezing chamber is not passively refrigerated any more, and the problem of severe cold bias of the freezing chamber is avoided. When the freezing evaporator defrosts, the ice maker can still continue to operate to make ice, the whole refrigeration system does not need to stop working, the ice making capacity can be effectively improved, and the purpose of saving energy is achieved by selecting the dominant loop when the ice is full or low in demand. Furthermore, the accurate temperature control of the freezing chamber can be realized, the unnecessary low temperature of the freezing chamber is reduced, the defrosting time is shortened, and the energy consumption is indirectly saved.

Drawings

FIG. 1 is a schematic diagram of the configuration of a refrigeration system for a refrigerator in one embodiment of the present invention;

FIG. 2 is a schematic diagram of the configuration of a refrigeration system for a refrigerator in one embodiment of the present invention;

FIG. 3 is a schematic diagram of the configuration of a refrigeration system for a refrigerator in one embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a refrigerator in one embodiment of the present invention;

fig. 5 is a schematic structural view of an ice making device in an embodiment of the present invention;

FIG. 6 is an exploded view of an ice maker in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an ice maker in an embodiment of the present invention;

fig. 8 is a schematic structural view of a fan of an ice maker in an embodiment of the present invention;

in the figure, 100, a refrigerant transportation circuit, 110, a compressor, 120, a condenser, 200, a

switching valve group

200, 300, a freezing refrigeration circuit, 310, a freezing capillary tube, 320, a freezing evaporator, 400, an ice making refrigeration circuit, 410, an ice making capillary tube, 500, a refrigerating chamber, 600, an ice making device, 610, an ice making machine, 611, a first refrigeration evaporation tube, 612, a second refrigeration evaporation tube, 613, a drainage channel, 614, a pressing plate, 615, an ice grid, 616, an ice turning rod, 617, an ice making fan, 620, a fixing seat, 621, an ice storage chamber, 622, a door body, 700, a refrigerating refrigeration circuit, 710, a refrigerating evaporator, 720, a refrigerating throttling device, 800, a temperature changing chamber, 900, a freezing chamber, 1000, a temperature changing refrigeration circuit, 1100, a temperature changing evaporator, 1200 and a temperature changing throttling device.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The invention will be further explained and explained with reference to the drawings and the embodiments in the description. The step numbers in the embodiments of the present invention are set for convenience of illustration only, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

As shown in fig. 1 to 8, a refrigerator according to a preferred embodiment of the present invention includes an ice making device 600, a refrigerant transporting circuit 100, a freezing and refrigerating circuit 300, an ice making and refrigerating circuit 400, and a switching valve block 200,

the ice making device 600 has at least two refrigeration evaporation tubes independently arranged, and the outlet ends of the two refrigeration evaporation tubes are both connected with the refrigerant inlet end;

the refrigerant transport loop 100 has a refrigerant discharge end and a refrigerant inlet end, the outlet ends of both refrigerant evaporation tubes being connected to the refrigerant inlet end;

one end of the freezing and refrigerating circuit 300 is connected with a refrigerant discharge end, and the other end of the freezing and refrigerating circuit 300 is connected with an inlet end of one of the refrigerating evaporation tubes, and is used for refrigerating the ice making device 600;

one end of the ice-making refrigeration circuit 400 is connected with a refrigerant discharge end, and the other end of the ice-making refrigeration circuit 400 is connected with an inlet end of one of the refrigeration evaporation tubes for refrigerating the ice-making device 600;

the switching valve block 200 is disposed at the upstream ends of the freezing and refrigerating circuit 300 and the ice-making and refrigerating circuit 400, and the switching valve block 200 can be switched among a first position, a second position and a third position;

when the switching valve block 200 is in the first position, the refrigerant discharge ends of the refrigerant transport circuit 100 are respectively communicated with the freezing refrigeration circuit 300 and the ice-making refrigeration circuit 400;

when the switching valve block 200 is in the second position, the refrigerant discharge end of the refrigerant transport circuit 100 is in communication with the freezing refrigeration circuit 300, and the refrigerant discharge end of the refrigerant transport circuit 100 is disconnected from the ice making refrigeration circuit 400;

when the switching valve block 200 is in the third position, the refrigerant discharge end of the refrigerant transport circuit 100 is in communication with the ice-making refrigeration circuit 400 and the refrigerant discharge end of the refrigerant transport circuit 100 is disconnected from the freezing refrigeration circuit 300.

Based on the technical scheme, the ice maker 610 with double channels is arranged, and the ice maker 610 is used for refrigerating through two loops, so that the refrigerating loop can be disconnected, the temperature of the freezing chamber 900 can be accurately controlled, the freezing chamber 900 is not passively refrigerated any more, and the problem that the freezing chamber 900 is severely cooled is avoided. When the freezing evaporator 320 defrosts, the ice maker 610 can still continue to operate to make ice, the whole refrigeration system does not need to stop working, the ice making capacity can be effectively improved, and the purpose of saving energy can be achieved by selecting the dominant loop when the ice is full or low in demand. Furthermore, the accurate temperature control of the freezing chamber 900 can be realized, the unnecessary low temperature of the freezing chamber 900 is reduced, the defrosting time is shortened, and the energy consumption is indirectly saved.

In some embodiments of the present application, the refrigerator further includes a controller electrically connected to the switching valve block 200, the controller implementing switching of the position of the switching valve block 200,

when the required quantity of ice cubes is larger than a preset value, the controller controls the switching valve bank 200 to be at a first position, and the refrigerant discharge ends of the refrigerant transportation circuit 100 are respectively communicated with the freezing refrigeration circuit 300 and the ice making refrigeration circuit 400;

when the number of the required ice cubes is smaller than the preset value, the controller controls the switching valve block 200 to be in the second position, the refrigerant discharge end of the refrigerant transportation circuit 100 is communicated with the freezing and refrigerating circuit 300, and the refrigerant discharge end of the refrigerant transportation circuit 100 is disconnected from the ice making and refrigerating circuit 400;

when the evaporator on the freezing refrigeration circuit needs defrosting, the controller controls the switching valve set 200 to be in the third position, the refrigerant discharge end of the refrigerant transportation circuit 100 is communicated with the ice-making refrigeration circuit 400, and the refrigerant discharge end of the refrigerant transportation circuit 100 is disconnected with the freezing refrigeration circuit 300.

In some embodiments of the present application, when the freezing compartment reaches the preset minimum temperature, the refrigerant discharge end of the refrigerant transportation circuit 100 is communicated with the ice-making refrigeration circuit 400, and the refrigerant discharge end of the refrigerant transportation circuit 100 is disconnected from the freezing refrigeration circuit 300, thereby achieving precise temperature control of the freezing compartment 900, reducing unnecessary low temperature of the freezing compartment 900, shortening defrosting time, and indirectly saving energy consumption.

In some embodiments of the present application, a freezing throttling device and a freezing evaporator 320 are sequentially arranged on the freezing refrigeration circuit 300 along the flowing direction of the refrigerant, the freezing throttling device is connected with the refrigerant discharge end, and the freezing evaporator 320 is connected with one of the refrigeration evaporation pipes; the ice-making refrigeration circuit 400 is provided with an ice-making throttling device, one end of the ice-making throttling device is connected with the refrigerant discharge end, and the other end of the ice-making throttling device is connected with one refrigeration evaporation pipe.

In some embodiments of the present application, the freeze throttle is a freeze capillary 310 and the ice throttle is an ice capillary 410.

As shown in fig. 5 to 8, in some embodiments of the present application, the ice making device 600 includes an ice maker 610, a first refrigerating evaporation pipe 611, a second refrigerating evaporation pipe 612, an ice tray 615, a water filling device, a turnover mechanism, and a heater,

the ice maker 610 has an ice making chamber;

the first refrigeration evaporation pipe 611 is arranged in the ice making chamber along the extending direction of the ice making chamber, one end of the first refrigeration evaporation pipe 611 is connected with the freezing evaporator 320, and the other end of the first refrigeration evaporation pipe 611 is connected with the refrigerant inlet end;

the second refrigeration evaporation pipe 612 is arranged in the ice making chamber along the extension direction of the ice making chamber, one end of the second refrigeration evaporation pipe 612 is connected with the ice making refrigeration circuit 400, and the other end of the second refrigeration evaporation pipe 612 is connected with the refrigerant inlet end;

the ice tray 615 is arranged in the ice making chamber and is positioned above the first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612, and a plurality of accommodating grooves for forming ice cubes are formed in the ice tray 615;

the water injection device is used for supplying water to the ice tray 615;

the turnover mechanism is arranged in the ice making chamber and used for turning over the ice grids 615;

the heater is disposed in the ice making chamber to heat the ice tray 615.

In some embodiments of the present application, the flipping mechanism includes an ice-flipping bar 616 and a motor, the ice-flipping bar 616 being disposed over the ice grid 615;

the motor is connected to the ice turning lever 616 for driving the ice turning lever 616 to rotate, thereby turning the ice tray 615.

The first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612 are in direct contact with the ice tray 615 of the ice maker 610, through refrigerant evaporation, the first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612 reach low temperature of about-33 degrees, the ice tray 615 in contact with the first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612 also reaches-25 degrees, water in the ice tray 615 is cooled, finally the water is changed into ice, the ice blocks are separated from the ice tray 615 through heating of a heater of the ice maker 610, and after the ice tray is turned over by the turning mechanism, the ice blocks are separated from the ice tray 615.

In some embodiments of the present application, a pressing plate 614 for fixing the first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612 is disposed in the ice making chamber, so as to facilitate fixing the first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612, and prevent the positions of the first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612 from being shifted, so that the distance between the first refrigeration evaporating pipe 611 and the second refrigeration evaporating pipe 612 and the ice tray 615 is increased, thereby preventing waste of cold.

In some embodiments of the present application, the ice making device 600 further includes an ice making fan 617, the ice making fan 617 is disposed in the ice making chamber, and the ice making fan 617 is disposed opposite to the refrigeration evaporation pipe, so that the ice making fan 617 performs an effective operation to form an air channel between the inside and the outside of the ice making machine 610, and perform a small local circulation refrigeration to achieve an effect of maintaining the temperature in the ice making chamber.

In some embodiments of the present application, the ice maker 610 further has a water drainage channel 613, and the water drainage channel 613 is used for draining the excess water in the ice tray 615 out of the ice maker 610, so that the water in the ice maker 610 can be quickly drained, and damage to components such as a circuit of the ice maker 610 is avoided.

In some embodiments of the present application, the ice making apparatus 600 further includes a fixing base 620, by which the ice making apparatus 610 is conveniently installed on the refrigerator by providing the fixing base 620, an ice storage chamber 621 is provided in the fixing base 620, the ice making apparatus 610 is installed on the top of the ice storage chamber 621, a water inlet pipe is connected to the top of the ice storage chamber 621, and a connection hole through which the first refrigerant circulation pipe and the second refrigerant circulation pipe pass is provided at the rear side of the ice storage chamber 621.

In some embodiments of the present application, a water outlet connected to the water drainage channel 613 is disposed on the box body, so that water in the ice maker 610 can be quickly drained, and damage to components such as a circuit of the ice maker 610 can be avoided.

In some embodiments of the present application, a water collecting pipe is connected to a front side of the water discharging port, an opening is disposed at a top of the water collecting pipe, a diameter of the water collecting pipe is gradually increased along a direction pointing to the drainage channel 613, and the drainage channel is disposed opposite to an end of the drainage channel 613, so that the water collecting pipe plays a role in collecting and draining water discharged from the drainage channel 613, and discharges the water in time to prevent the ice maker 610 from being damaged.

In some embodiments of the present application, a door 622 is disposed at a front side of the ice storage chamber 621, and the door 622 is rotatably mounted on the box, so that a user can open the door 622 to take ice cubes in the ice storage chamber 621.

In some embodiments of the present application, the refrigerator further includes a fresh-keeping refrigeration loop, the fresh-keeping refrigeration loop is disposed at a downstream end of the switching valve set 200, a fresh-keeping throttling device and a fresh-keeping evaporator are sequentially disposed on the fresh-keeping refrigeration loop along a flow direction of the refrigerant, one end of the fresh-keeping refrigeration loop is connected to the switching valve set 200, and the other end of the fresh-keeping refrigeration loop is connected to the first fulcrum of the freezing refrigeration loop 100.

In some embodiments of the present application, the first branch point is located between the cryocapillary 310 and the cryoevaporator 320.

In some embodiments of the present application, the refrigerator further includes a preservation chamber, and the freezing evaporator 320 is used to maintain the temperature in the preservation chamber not to exceed a preset value.

Specifically, the method comprises the following steps:

as shown in fig. 2, in some embodiments of the present application, the refrigerator further includes a refrigerating refrigeration circuit 700, a refrigerating throttle device 720 and a refrigerating evaporator 710 are sequentially disposed on the refrigerating refrigeration circuit 700 along a refrigerant flow direction, the switching valve set 200 is disposed at an upstream end of the refrigerating refrigeration circuit 700, and another end of the refrigerating refrigeration circuit 700 is connected between the freezing capillary tube 310 and the freezing evaporator 320, so that the refrigerant transportation circuit 100 can also refrigerate the refrigerating chamber at the same time.

In some embodiments of the present application, the refrigerator further includes a temperature-varying chamber 800, and the freezing evaporator 320 is used to maintain the temperature inside the temperature-varying chamber 800 not to exceed a preset value, so that more preservation requirements of a user can be satisfied by setting the temperature-varying chamber 800.

As shown in fig. 3, in some embodiments of the present application, the refrigerator further includes a temperature-varying refrigeration circuit 1000, the temperature-varying refrigeration circuit 1000 is provided with a temperature-varying throttling device 1200 and a temperature-varying evaporator 1100 in sequence along a refrigeration flow direction, the switching valve set 200 is disposed at an upstream end of the temperature-varying refrigeration circuit 1000, and another end of the temperature-varying refrigeration circuit 1000 is connected between the freezing capillary tube 310 and the freezing evaporator 320, so that the refrigerant transportation circuit 100 can also refrigerate the temperature-varying chamber at the same time.

In some embodiments of the present application, the refrigerator further includes a refrigerating compartment 500, and the freezing evaporator 320 is used to maintain the temperature inside the refrigerating compartment 500 not to exceed a preset value.

In some embodiments of the present application, a compressor 110 and a condenser 120 are provided in sequence on the refrigerant transport circuit 100.

The working process of the invention is as follows:

because the ice maker 610 is provided with two channels, two circuits which are independently arranged are formed:

circuit 1 (refrigeration circuit):

when the circuit 1 is open, the refrigerant circulation direction is: the compressor 110 → the condenser 120 → the switching valve set 200 → the freezing capillary tube 310 → the freezing evaporator 320 → the ice maker 610, that is, a single circuit of the freezing evaporator 320, which realizes the refrigeration of the freezing chamber 900 (refrigerating chamber 500/air cooling/(extended temperature change)), the refrigerating chamber 500 and the freezing chamber 900 perform cold air circulation through an air duct, controlled by an air door, the refrigeration of the two chambers can be realized through the freezing evaporator 320 by the refrigerant, the refrigeration of the two chambers is the traditional air cooling principle, the refrigerant flows into a refrigeration evaporating pipe of the ice maker 610 after flowing out of the freezing evaporator 320, refrigerates the ice maker 610 and finally returns to the compressor 110.

Circuit 2 (ice-making circuit):

when the circuit 2 is open, the refrigerant circulates in the following direction: compressor 110 → condenser 120 → switching valve set 200 → ice making capillary tube 410 → ice making machine 610, and this circuit is realized, and can be operated independently to meet the refrigeration requirement of ice making machine 610.

The circuits 1 and 2 form a parallel refrigeration system, and circuit selection is performed through the controller and the switching valve group 200, so that full-time ice making is finally realized (when the freezing evaporator 320 is defrosted, only the circuit 1 is disconnected, and the circuit 2 continues to make ice), and the precise control of the freezing temperature is realized. (breaking the circuit 1 when the freezer reaches temperature)

The switching valve block 200 can implement three modes:

the circuits 1, 2 are opened simultaneously;

the loop 1 is opened, and the loop 2 is not opened;

loop 2 is open, loop 1 is not open:

namely, as long as the refrigerator has a refrigeration demand, the refrigeration loop can be opened at will.

When the ice demand is maximum, the circuits 1 and 2 can be opened at the same time, so that the ice making efficiency is highest.

When the ice demand is normal, the circuit 2 is opened.

When the demand of ice cubes is less or no demand is needed, the loop 1 is opened to meet the minimum demand of refrigeration of the ice maker 610, meanwhile, the temperature of the ice storage room 621 is guaranteed, and the loop 2 is opened less to save energy.

After the refrigerator is started, the ice demand is judged according to the number of ice blocks in the ice storage chamber 621.

The number of ice cubes in the ice storage chamber 621 is determined by the combined action of the ice detecting rod and the infrared sensing device arranged in the ice storage chamber 621 and then fed back to the controller, and the ice cubes are usually stored to be more than 80% of the preset number of ice cubes as soon as possible.

When the fastest ice making is required, the loop 1 and the loop 2 are opened, and ice making is carried out on the two loops simultaneously, so that the freezing temperature is allowed to be properly colder. At this time, the system does not enter into defrosting.

If the ice demand is normal or low, the circuit 1 is opened preferentially only for ice making demand and the circuit 2 is temporarily closed.

If the freezing evaporator 320 needs defrosting, the circuit 1 is disconnected, the circuit 2 is kept open to meet the requirement of full-time ice making, and ice making cannot be stopped due to defrosting of the evaporator.

If the freezing chamber 900 reaches the set temperature, the loop 1 is disconnected, the loop 2 is kept open to meet the requirement of full-time ice making, and the temperature of the freezing chamber 900 is ensured to operate according to the set temperature of the freezing chamber, so that accurate temperature control is achieved.

To sum up, the embodiment of the present invention provides a refrigerator, in which the ice maker 610 with two channels is provided, and the ice maker 610 performs cooling by two circuits, so that the freezing circuit can be disconnected, the temperature of the freezing chamber 900 can be accurately controlled, the freezing chamber 900 is not passively cooled any more, and the problem of severe cold bias of the freezing chamber 900 is avoided. When the freezing evaporator 320 defrosts, the ice maker 610 can still continue to operate to make ice, the whole refrigeration system does not need to stop working, the ice making capacity can be effectively improved, and the purpose of saving energy can be achieved by selecting the dominant loop when the ice is full or low in demand. Furthermore, the accurate temperature control of the freezing chamber 900 can be realized, the unnecessary low temperature of the freezing chamber 900 is reduced, the defrosting time is shortened, and the energy consumption is indirectly saved.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Moreover, some of the above terms may be used to indicate other meanings besides orientation or position, for example, the term "on" may also be used to indicate some kind of dependency or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A refrigerator, characterized by comprising:

an ice-making device having at least two independently provided refrigeration evaporating pipes;

a freezing and refrigerating circuit, one end of which is connected with the refrigerant discharge end, and the other end of which is connected with the inlet end of one of the refrigerating evaporation tubes, and is used for refrigerating the ice making device;

the ice-making refrigeration circuit is connected with the refrigerant discharge end at one end and connected with the inlet end of one of the refrigeration evaporation tubes at the other end, and is used for refrigerating the ice-making device; and

a switching valve group provided at upstream ends of the freezing refrigeration circuit and the ice-making refrigeration circuit, the switching valve group being switchable among a first position, a second position, and a third position;

2. The refrigerator of claim 1, further comprising a controller electrically connected to the switching valve block, the controller configured to:

3. The refrigerator of claim 2 wherein a refrigerant discharge end of the refrigerant transport circuit is in communication with the ice-making refrigeration circuit and a refrigerant discharge end of the refrigerant transport circuit is disconnected from the freezing refrigeration circuit when the freezer compartment reaches a preset minimum temperature.

4. The refrigerator according to claim 1,

a freezing throttling device and a freezing evaporator are sequentially arranged on the freezing refrigeration loop along the flowing direction of the refrigerant, the freezing throttling device is connected with the discharge end of the refrigerant, and the freezing evaporator is connected with one of the refrigeration evaporation pipes;

5. The refrigerator of claim 4, wherein the ice making device comprises:

an ice maker having an ice making chamber;

the ice tray is arranged in the ice making chamber and positioned above the first refrigeration evaporation pipe and the second refrigeration evaporation pipe, and a plurality of accommodating grooves for forming ice blocks are formed in the ice tray;

the water injection device is used for supplying water to the ice tray;

the turnover mechanism is arranged in the ice making chamber and used for enabling the ice grids to turn over; and

and the heater is arranged in the ice making chamber and used for heating the ice tray.

6. The refrigerator of claim 5, wherein the turnover mechanism comprises:

the ice turning rod is arranged above the ice grids; and

and the motor is connected with the ice turning rod and used for driving the ice turning rod to rotate so as to turn the ice grids.

7. The refrigerator of claim 6, wherein the ice making device further comprises an ice making fan disposed in the ice making chamber, the ice making fan being disposed opposite to the refrigerating evaporation pipe.

8. The refrigerator according to claim 1, further comprising a fresh-keeping refrigeration circuit, wherein the fresh-keeping refrigeration circuit is disposed at a downstream end of the switching valve set, a fresh-keeping throttling device and a fresh-keeping evaporator are sequentially disposed on the fresh-keeping refrigeration circuit along a flow direction of the refrigerant, one end of the fresh-keeping refrigeration circuit is connected to the switching valve set, and the other end of the fresh-keeping refrigeration circuit is connected to the first branch point of the freezing refrigeration circuit.

9. The refrigerator of claim 8 wherein the first fulcrum is located between the freeze throttle and the freeze evaporator.

10. The refrigerator of claim 4, further comprising a preservation chamber, wherein the freezer evaporator is configured to maintain a temperature within the preservation chamber not to exceed a preset value.