CN221279694U

CN221279694U - Refrigerating system and refrigerator

Info

Publication number: CN221279694U
Application number: CN202322979274.7U
Authority: CN
Inventors: 赖晓翔; 伍智勤; 叶钰龙; 陈瑞博
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2024-07-05
Anticipated expiration: 2033-11-01

Abstract

The utility model provides a refrigerating system and a refrigerator, wherein the refrigerating system comprises: the system comprises a compressor, a condenser, a pipeline assembly, a first throttling assembly, a first evaporator and a bypass pipeline assembly. The compressor is provided with a first air return port, a second air return port and an air outlet; the inlet of the condenser is communicated with the air outlet; the pipeline assembly is provided with a first inlet, a first outlet and a second outlet, the first inlet is communicated with the outlet of the condenser, the first outlet is communicated with the first air return port, and the second outlet is communicated with the second air return port; the first throttling component and the first evaporator are both arranged on the pipeline assembly; the inlet of the bypass pipeline assembly is communicated with the air outlet or the outlet of the condenser, the outlet of the bypass pipeline assembly is communicated with the inlet of the first evaporator, and the bypass pipeline assembly is controlled to be opened and closed through the first control valve. The refrigerating system of the embodiment can provide a freezing function and a deep cooling function for the freezing chamber, and can enable defrosting in a deep cooling mode to be more energy-saving.

Description

Refrigerating system and refrigerator

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a refrigeration system and a refrigerator.

Background

The surface of the evaporator of the freezing chamber can be frosted after the evaporator works for a period of time, and the heat exchange efficiency of the frosted evaporator is low, so that the surface of the evaporator of the freezing chamber needs to be defrosted in time. The existing defrosting mode of the refrigerator mainly comprises defrosting by a heater, and defrosting is carried out by radiation of the heater, so that the existing defrosting mode is more common; some modes of hot gas bypass defrosting are adopted, namely, high-temperature and high-pressure refrigerant generated by a compressor enters an evaporator to defrost, but the conventional R600a/R290 refrigerant commonly used in the refrigerator has limited heat generation and can not completely replace the defrosting of a heater, and the defrosting of the heater and the hot gas bypass defrosting are required to be simultaneously carried out, so that the material cost is increased, and the energy-saving effect is not obvious.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a refrigerating system which can reduce defrosting energy consumption and use cost.

The utility model also provides a refrigerator applying the refrigerating system.

According to an embodiment of the first aspect of the present utility model, a refrigeration system includes: the system comprises a compressor, a condenser, a pipeline assembly, a first throttling assembly, a first evaporator and a bypass pipeline assembly. The compressor is provided with a first air return port, a second air return port and an air outlet; the inlet of the condenser is communicated with the air outlet; the pipeline assembly is provided with a first inlet, a first outlet and a second outlet, the first inlet is communicated with the outlet of the condenser, the first outlet is communicated with the first air return port, and the second outlet is communicated with the second air return port; the first throttling component and the first evaporator are arranged on the pipeline assembly; the inlet of the bypass pipeline assembly is communicated with the air outlet or the outlet of the condenser, the outlet of the bypass pipeline assembly is communicated with the inlet of the first evaporator, and the bypass pipeline assembly is controlled to be opened and closed through a first control valve.

The refrigerating system provided by the embodiment of the utility model has at least the following beneficial effects: the refrigeration system of the above embodiment can provide a freezing function and a deep cooling function for the freezing chamber. When the refrigerating system provides a refrigerating function for the refrigerating chamber, at the moment, the moisture in the refrigerating chamber mainly completes frosting at the first evaporator through the air path circulation, and the first evaporator can be defrosted by selecting an electric heater; when the refrigerating system provides a deep cooling function for the freezing chamber, the temperature in the freezing chamber is extremely low, and moisture in the humid air is directly sublimated into frost on the interior decoration, so that the frosting amount at the evaporator is reduced when the deep cooling function is started compared with that of normal refrigeration. The reduction of the frosting quantity means that lower power can be adopted for defrosting, at the moment, the first control valve can be selectively opened, the high-temperature and high-pressure refrigerant output by the compressor enters the first evaporator, and the high-temperature and high-pressure refrigerant in the first evaporator is utilized for carrying out heat exchange on frosting on the surface of the first evaporator, so that the purpose of energy saving and defrosting is achieved.

According to some embodiments of the first aspect of the utility model, the first control valve has a second inlet in communication with the air outlet, a third outlet in communication with the inlet of the condenser, and a fourth outlet in communication with the bypass line assembly.

According to some embodiments of the first aspect of the present utility model, the pipeline assembly includes a second control valve, a first pipeline, a second pipeline, the first inlet is disposed on the second control valve, the second control valve further has a fifth outlet and a sixth outlet, two ends of the first pipeline are respectively connected to the fifth outlet and the first air return port, two ends of the second pipeline are respectively connected to the sixth outlet and the second air return port, the first throttling component and the first evaporator are disposed on the first pipeline, and the second pipeline is provided with a second throttling component and a second evaporator.

According to some embodiments of the first aspect of the present utility model, the pipeline assembly includes a second control valve, a gas-liquid separator, a third pipeline and a fourth pipeline, the first inlet is disposed on the second control valve, the second control valve further has a fifth outlet, two ends of the third pipeline are communicated with the fifth outlet and the first air return port, the first throttling component, the gas-liquid separator and the first evaporator are disposed on the third pipeline, an inlet of the gas-liquid separator is communicated with an outlet of the first throttling component, a liquid outlet of the gas-liquid separator is communicated with an inlet of the first evaporator, and two ends of the fourth pipeline are respectively communicated with a gas outlet of the gas-liquid separator and the second air return port.

According to some embodiments of the first aspect of the present utility model, the pipeline assembly further includes a fifth pipeline, the second control valve further has a sixth outlet, two ends of the fifth pipeline are respectively connected to the sixth outlet and the first return port, and a second throttling part and a second evaporator are disposed on the fifth pipeline.

According to some embodiments of the first aspect of the present utility model, the pipeline assembly further includes a sixth pipeline, the second control valve further includes a sixth outlet, two ends of the sixth pipeline are respectively connected to the sixth outlet and the second return port, a second throttling component and a second evaporator are disposed on the sixth pipeline, and a check valve is disposed on the fourth pipeline.

According to some embodiments of the first aspect of the present utility model, a third throttling part is further disposed on the third pipeline, and two ends of the third throttling part are respectively communicated with the liquid outlet of the gas-liquid separator and the inlet of the first evaporator.

According to some embodiments of the first aspect of the utility model, the first control valve has a second inlet in communication with the outlet of the condenser, a third outlet in communication with the first inlet, and a fourth outlet in communication with the bypass line assembly.

According to some embodiments of the first aspect of the utility model, the first throttling member and the second throttling member are both provided as capillary tubes.

A refrigerator according to an embodiment of the second aspect of the present utility model includes an electric heater for heating and defrosting and a refrigerating system according to an embodiment of the first aspect of the present utility model.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of a refrigeration system;

FIG. 2 is a schematic diagram of a third embodiment of a refrigeration system;

FIG. 3 is a schematic diagram of a fourth embodiment of a refrigeration system;

fig. 4 is a schematic diagram of a fifth embodiment of a refrigeration system.

Reference numerals

A compressor 100; a first return port 110; a second return port 120; an air outlet 130;

a condenser 200;

a first throttle member 310; a first evaporator 320; a second throttle member 330; a second evaporator 340; a third throttle member 350;

Bypass line assembly 400;

A first control valve 500; a second inlet 510; a third outlet 520; a fourth outlet 530;

a second control valve 600; a first inlet 610; a fifth outlet 620; a sixth outlet 630;

a first conduit 710; a second conduit 720; a third conduit 730; fourth pipeline 740; a fifth line 750; a sixth conduit 760;

a gas-liquid separator 800; a one-way valve 810.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The refrigerator is an electric appliance for providing a low-temperature environment to store food materials and other articles, is popular with people, and is widely used. Refrigerators generally have a refrigerating chamber and a freezing chamber, the temperature of the freezing chamber is generally above zero and below thirty degrees celsius, and with the development of refrigerator technology, household refrigerators are gradually provided with a deep cooling function, wherein the deep cooling function generally refers to that the freezing temperature is below zero and below thirty degrees celsius.

When the normal refrigerator is used for refrigerating, the moisture in the air in the refrigerator is mainly derived from food and wet air outside the door opening and closing, wherein the moisture brought by the door opening and closing accounts for a large proportion, and the moisture mainly completes frosting at the evaporator through the air path circulation; when the box body with the deep cooling function is started, the temperature in the refrigerating chamber is extremely low, and moisture in the humid air is directly sublimated to form frost on the interior decoration, so that the frosting amount at the evaporator is reduced when the deep cooling function is started compared with that of normal refrigeration.

As shown in fig. 1 to 4, the first aspect of the present utility model provides a refrigeration system including a compressor 100, a condenser 200, a pipe assembly, a first throttling part 310, a first evaporator 320, and a bypass pipe assembly 400. The compressor 100 has a first return port 110, a second return port 120, and an outlet port 130; the refrigerant gas enters the compressor 100 from the first air return port 110 and the second air return port 120, the high-temperature and high-pressure refrigerant obtained by the work of the compressor 100 is discharged from the air outlet 130, and the first air return port 110 is a main air return port; the inlet of the condenser 200 is communicated with the air outlet 130; the pipeline assembly is provided with a first inlet 610, a first outlet and a second outlet, wherein the first inlet 610 is communicated with the outlet of the condenser 200, the first outlet is communicated with the first air return port 110, and the second outlet is communicated with the second air return port 120; the first throttling part 310 and the first evaporator 320 are both disposed in a pipeline assembly, and the compressor 100, the condenser 200, the pipeline assembly, the first throttling part 310 and the first evaporator 320 form a compression refrigeration circuit; the inlet of the bypass pipeline assembly 400 is communicated with the air outlet 130, the outlet of the bypass pipeline assembly 400 is communicated with the inlet of the first evaporator 320, the bypass pipeline assembly 400 is controlled to be opened and closed through the first control valve 500, when the first control valve 500 is opened, the bypass pipeline assembly 400 starts to work, and when the first control valve 500 is closed, the bypass pipeline assembly 400 does not work and is in a standby state.

The compressor 100 having two return ports as described above can provide a sufficient cooling capacity for the first evaporator 320 in the case of using the conventional R600a/R290 refrigerant, and thus can provide a deep cooling mode for the refrigerator. Specifically, when the compressor works, the first air return port 110 sucks air, the refrigerant entering through the first air return port 110 is primarily compressed, and the primarily compressed refrigerant and the refrigerant entering through the second air return port 120 are secondarily compressed together, so that the air inflow in the secondary compression is increased, the initial pressure of the refrigerant in the secondary compression is also increased, and the flow (refrigerating capacity) of the compressor is obviously improved, therefore, the compressor can provide enough refrigerating capacity for the first evaporator 320, and further can provide a deep cooling mode for the refrigerator.

When the first control valve 500 is closed, the compressor 100 performs work to output high-temperature and high-pressure refrigerant, the refrigerant enters the condenser 200 to dissipate heat, the condenser 200 is used for cooling the refrigerant to obtain medium-temperature and high-pressure refrigerant, the refrigerant discharged by the condenser 200 enters the pipeline assembly, then enters the first throttling part 310 to perform throttling and depressurization, the temperature and the pressure of the refrigerant are reduced, the refrigerant entering the first evaporator 320 becomes low-pressure liquid with lower saturation temperature, the refrigerant evaporates in the first evaporator 320 to absorb heat in the refrigerator, the purpose of reducing the internal temperature of the refrigerator is achieved, and the refrigerant evaporated by the first evaporator 320 enters the compressor 100 from the first air return port 110 to be recycled.

When the first control valve 500 is opened, the compressor 100 performs work to output high-temperature and high-pressure refrigerant, the refrigerant enters the bypass pipeline assembly 400, the high-temperature and high-pressure refrigerant enters the first evaporator 320 through the bypass pipeline assembly 400, and the high-temperature and high-pressure refrigerant in the first evaporator 320 is utilized to perform heat exchange on frosting on the surface of the first evaporator 320, so that the defrosting purpose is achieved. When the refrigerator is in a deep cooling mode, the high-temperature and high-pressure refrigerant connected by the bypass pipeline assembly 400 is enough to realize daily defrosting in the deep cooling mode, so that the refrigerator is more energy-saving compared with defrosting by adopting a heater all the time, and is more energy-saving compared with defrosting by adopting the heater and hot gas bypass.

In summary, the refrigeration system of the above embodiment can provide a freezing function and a deep cooling function for the freezing chamber. When the refrigerating system provides a refrigerating function for the refrigerating chamber, at the moment, the moisture in the refrigerating chamber mainly completes frosting at the first evaporator 320 through the air path circulation, and the first evaporator 320 can be defrosted by selecting an electric heater; when the refrigerating system provides a deep cooling function for the freezing chamber, the temperature in the freezing chamber is extremely low, and moisture in the humid air is directly sublimated into frost on the interior decoration, so that the frosting amount at the evaporator is reduced when the deep cooling function is started compared with that of normal refrigeration. The reduction of the frosting amount means that a lower power can be used for defrosting, at this time, the first control valve 500 can be selectively opened, the high-temperature and high-pressure refrigerant output by the compressor 100 enters the first evaporator 320, and the frosting on the surface of the first evaporator 320 is subjected to heat exchange by using the high-temperature and high-pressure refrigerant in the first evaporator 320, so that the purpose of energy saving and defrosting is achieved.

In addition, if the first evaporator 320 is not defrosted in time in the freezing mode from the freezing mode, frost formation on the first evaporator 320 after entering the deep cooling mode may be thicker, at this time, the first evaporator 320 may be defrosted by the electric heater after entering the deep cooling mode, so as to improve defrosting efficiency, and after that, defrosting in the deep cooling mode may be performed by opening the first control valve 500, so that energy consumed by defrosting is reduced on the premise of ensuring defrosting efficiency, thereby achieving the effects of energy saving and environmental protection.

It should be noted that, as shown in fig. 4, the inlet of the bypass line assembly 400 is not necessarily connected to the air outlet 130, as long as the bypass line assembly 400 can be connected to a refrigerant with a higher temperature, so that the inlet of the bypass line assembly 400 may be selectively connected to the outlet of the condenser 200, the temperature of the refrigerant discharged from the outlet of the condenser 200 is still higher, and the refrigerant enters the first evaporator 320 through the bypass line assembly 400, or the frosting on the surface of the first evaporator 320 may be subjected to heat exchange to defrost.

Specifically, the first throttling part 310 may be provided as a capillary tube, and the cost is low by throttling with the capillary tube. Of course, it is understood that the first throttling element 310 may be provided as an expansion valve, and may serve the purpose of reducing the temperature and pressure of the refrigerant.

As shown in fig. 1, in particular, in some embodiments of the first aspect of the present utility model, a first control valve 500 is positioned between the condenser 200 and the compressor 100, the first control valve 500 having a second inlet 510, a third outlet 520, and a fourth outlet 530, the second inlet 510 being in communication with the air outlet 130, the third outlet 520 being in communication with the inlet of the condenser 200, the fourth outlet 530 being in communication with the bypass line assembly 400. The first control valve 500 has at least two working states, the first working state is that the second inlet 510 is communicated with the third outlet 520, the second inlet 510 is closed with the fourth outlet 530, and at this time, the bypass pipeline assembly 400 is closed, and no defrosting is performed; the second working state is that the second inlet 510 is communicated with the third outlet 520, the second inlet 510 is communicated with the fourth outlet 530, and the defrosting work is started.

It should be noted that, the first control valve 500 may also have other working states for implementing other functions, for example, in some embodiments of the first aspect of the present utility model, the first control valve 500 may also have a third working state, where the second inlet 510, the third outlet 520 and the fourth outlet 530 are all in a closed state when the first control valve 500 is in the third working state, and the third working state is suitable for performing a pressure maintaining function for the refrigeration system when the compressor 100 is stopped. The first control valve 500 may be formed by two independent switch valve combinations, so as to achieve the three working states.

Further, as previously described, it is understood that the first control valve 500 may also be disposed between the piping assembly and the condenser 200, for example, in some embodiments of the first aspect of the present utility model, the first control valve 500 has a second inlet 510, a third outlet 520, and a fourth outlet 530, the second inlet 510 being in communication with the outlet of the condenser 200, the third outlet 520 being in communication with the first inlet 610, and the fourth outlet 530 being in communication with the bypass piping assembly 400. The first control valve 500 has three working states, the first working state is that the second inlet 510 is communicated with the third outlet 520, the second inlet 510 is closed with the fourth outlet 530, and the bypass line assembly 400 is closed at this time, and no defrosting is performed; the second working state is that the second inlet 510 is communicated with the third outlet 520, the second inlet 510 is communicated with the fourth outlet 530, and at the moment, defrosting work is started; the third working state is a state where the second inlet 510, the third outlet 520 and the fourth outlet 530 are all closed, and the third working state is suitable for maintaining the pressure of the refrigeration system when the compressor 100 is stopped.

As shown in fig. 1, in the first embodiment of the first aspect of the present utility model, the first control valve 500 is located between the condenser 200 and the compressor 100, the inlet of the bypass line assembly 400 is communicated with the air outlet 130 through the first control valve 500, and for the specific implementation of the line assembly, the line assembly includes the second control valve 600, the first line 710 and the second line 720, the first inlet 610 is disposed on the second control valve 600, the second control valve 600 further has the fifth outlet 620 and the sixth outlet 630, two ends of the first line 710 are respectively communicated with the fifth outlet 620 and the first air return 110, two ends of the second line 720 are respectively communicated with the sixth outlet 630 and the second air return 120, the first throttle member 310 and the first evaporator 320 are disposed on the first line 710, the outlet of the bypass line assembly 400 is connected with the first line 710 between the first throttle member 310 and the first evaporator 320, the second throttle member 330 and the second evaporator 340 are disposed on the second line 720, and the second throttle member 330 can be configured to be a capillary tube, with low cost. Of course, it is understood that the second throttling element 330 may be provided as an expansion valve, and may serve the purpose of reducing the temperature and pressure of the refrigerant.

The second evaporator 340 in the above embodiment is used to provide the refrigerating capacity for the refrigerating compartment, and the first evaporator 320 is used to provide the refrigerating capacity for the freezing compartment, or to defrost when defrosting is required in the deep cooling mode.

Wherein, the second control valve 600 has two working states, and when the second control valve 600 is in the first working state, the first inlet 610 is communicated with the fifth outlet 620 and the sixth outlet 630; when the second control valve 600 is in the second operating state, the first inlet 610 communicates with the sixth outlet 630, and the first inlet 610 does not communicate with the fifth outlet 620.

When the second control valve 600 is in the first operating state and the first control valve 500 is in the first operating state, the bypass line assembly 400 is closed. The specific working process of the refrigeration system is as follows, the high-temperature and high-pressure refrigerant discharged from the compressor 100 is all fed into the condenser 200, the temperature is reduced by the condenser 200 to obtain the medium-temperature and high-pressure refrigerant, then the refrigerant is fed into the first pipeline 710 and the second pipeline 720 through the second control valve 600, the refrigerant sequentially flows through the first throttling part 310 and the first evaporator 320 in the first pipeline 710 to refrigerate the freezing chamber, the refrigerant discharged from the first evaporator 320 is fed into the compressor 100 from the first air return port 110 to circulate, the refrigerant sequentially flows through the second throttling part 330 and the second evaporator 340 in the second pipeline 720 to refrigerate the refrigerating chamber, and the refrigerant discharged from the second evaporator 340 is fed into the compressor 100 from the second air return port 120 to circulate.

When the second control valve 600 is in the second operating state and the first control valve 500 is in the second operating state, the bypass line assembly 400 is opened and the frosting operation is performed. The specific working process of the refrigeration system is as follows, a part of the high-temperature and high-pressure refrigerant discharged by the compressor 100 enters the bypass pipeline assembly 400 and then enters the first evaporator 320 to defrost the freezing chamber, and then the refrigerant enters the compressor 100 from the first return air port 110 for circulation; the other part of the high-temperature and high-pressure refrigerant discharged from the compressor 100 enters the second control valve 600, and at this time, the second control valve 600 controls the part of the refrigerant to enter the second pipeline 720, and the refrigerant sequentially flows through the second throttling part 330 and the second evaporator 340 in the second pipeline 720 to cool the refrigerating chamber, so that the refrigerating chamber can be cooled while defrosting the freezing chamber, and the food in the refrigerating chamber can be kept in a normal fresh-keeping state.

It should be noted that, the second control valve 600 may also have other working states for implementing other functions, for example, in some embodiments of the first aspect of the present utility model, the second control valve 600 may also have a third working state, where the second control valve 600 is in the third working state, and the first inlet 610, the fifth outlet 620 and the sixth outlet 630 are all in a closed state, and the third working state is suitable for performing a pressure maintaining function for the refrigeration system when the compressor 100 is stopped.

Specifically, in the second embodiment of the first aspect of the present utility model, referring to fig. 2 and 3, the first control valve 500 is located between the condenser 200 and the compressor 100, the inlet of the bypass line assembly 400 is communicated with the inlet of the condenser 200 via the first control valve 500 and the outlet 130, the line assembly includes the second control valve 600, the gas-liquid separator 800, the third line 730 and the fourth line 740, the first inlet 610 is disposed on the second control valve 600, the second control valve 600 further has the fifth outlet 620, two ends of the third line 730 are communicated with the fifth outlet 620 and the first return air inlet 110, the first throttling part 310, the gas-liquid separator 800 and the first evaporator 320 are disposed on the third line 730, the inlet of the first throttling part 310 is communicated with the fifth outlet 130, the inlet of the gas-liquid separator 800 is communicated with the outlet of the first throttling part 310, the liquid outlet of the gas-liquid separator 800 is communicated with the inlet of the first evaporator 320, and two ends of the fourth line 740 are respectively connected with the gas outlet of the gas-liquid separator 800 and the second return air inlet 120.

The refrigerating system of the embodiment can provide larger refrigerating capacity for the freezing chamber, thereby realizing the effect of deep cooling of the freezing chamber. Specifically, when the first control valve 500 is in the first working state, the bypass line assembly 400 is closed, the high-temperature and high-pressure refrigerant discharged by the compressor 100 is all introduced into the condenser 200, the high-temperature and high-pressure refrigerant is obtained by cooling the condenser 200, the refrigerant is discharged from the condenser 200 and introduced into the second control valve 600, and then introduced into the first throttling part 310 on the third line 730, after cooling and depressurization by the first throttling part 310, a part of gaseous refrigerant may still exist in the refrigerant, at this time, the refrigerant introduced into the gas-liquid separator 800 by the first throttling part 310, separates the gaseous refrigerant and sends the gaseous refrigerant to the second air return port 120 through the fourth line 740, the part of gaseous refrigerant is introduced into the compressor 100 from the second air return port 120 for compression and recirculation, the liquid outlet of the gas-liquid separator 800 is substantially all the liquid refrigerant, and thus the refrigerant introduced into the first evaporator 320 can provide a larger refrigerating capacity, and further satisfy the refrigerating demand of the freezing chamber, and the gaseous refrigerant evaporated by the first evaporator 320 is introduced into the compressor 100 through the first air return port 110 for heat absorption.

In the above embodiment, when the first control valve 500 is in the second operating state, the second control valve 600 closes the connection between the first inlet 610 and the fifth outlet 620, and the high-temperature and high-pressure refrigerant discharged from the compressor 100 enters the bypass line assembly 400, then enters the first evaporator 320, defrost the freezing chamber, and then the refrigerant enters the compressor 100 from the first return air port 110 for circulation.

As shown in fig. 2, in a third embodiment of the first aspect of the present utility model, the third embodiment is extended from the second embodiment, the pipeline assembly further includes a fifth pipeline 750, the second control valve 600 further includes a sixth outlet 630, two ends of the fifth pipeline 750 are respectively connected to the sixth outlet 630 and the first air return port 110, and the fifth pipeline 750 is provided with a second throttling part 330 and a second evaporator 340. By adding the fifth line 750, the second evaporator 340 is provided in the fifth line 750 for cooling the refrigerating chamber. The second control valve 600 in the third embodiment operates in the same manner as the control valve in the first embodiment.

Specifically, when the first control valve 500 is in the first working state and the second control valve 600 is in the first working state, the bypass pipeline assembly 400 is closed, the high-temperature and high-pressure refrigerant discharged by the compressor 100 is all introduced into the condenser 200, the temperature is reduced by the condenser 200 to obtain a medium-high-pressure refrigerant, the refrigerant is discharged from the condenser 200 and then introduced into the second control valve 600, a part of the refrigerant is introduced into the first throttling part 310 on the third pipeline 730, after the temperature and the pressure are reduced by the first throttling part 310, a part of the gaseous refrigerant possibly exists in the refrigerant at this time, the refrigerant introduced into the gas-liquid separator 800 through the first throttling part 310 is separated, and is introduced into the second air return port 120 through the fourth pipeline 740, the part of the gaseous refrigerant is introduced into the compressor 100 for compression and recycling through the second air return port 120, the liquid outlet of the gas-liquid separator 800 is discharged into the first evaporator 320, and the refrigerant introduced into the first evaporator 320 is basically liquid refrigerant, so that a larger refrigerating capacity can be provided, and the refrigerant introduced into the first evaporator 320 for compression and recycling through the first evaporator 110 is subjected to compression and heat absorption; another part of the refrigerant in the second control valve 600 is introduced into the fifth pipe 750, the refrigerant sequentially flows through the second throttling part 330 and the second evaporator 340 in the fifth pipe 750, the refrigerant absorbs heat and evaporates in the second evaporator 340 to cool the refrigerating chamber, and the refrigerant which absorbs heat and evaporates through the second evaporator 340 is introduced into the compressor 100 through the first return port 110 to be compressed and recycled.

In the above embodiment, when the first control valve 500 is in the second operating state and the second control valve 600 is in the second operating state, the second control valve 600 closes the connection between the first inlet 610 and the fifth outlet 620, the first inlet 610 and the sixth outlet 630 are in the communication state, and a part of the high-temperature and high-pressure refrigerant discharged from the compressor 100 enters the bypass line assembly 400 and then enters the first evaporator 320 to defrost the freezing chamber, and then enters the compressor 100 from the first return port 110 to circulate; the other part of the high-temperature and high-pressure refrigerant discharged from the compressor 100 enters the condenser 200 to dissipate heat, the refrigerant cooled by the condenser 200 is changed into a medium-temperature and high-pressure state, then the refrigerant enters the second control valve 600, at this time, the second control valve 600 controls the part of the refrigerant to enter the fifth pipeline 750, the refrigerant sequentially flows through the second throttling part 330 and the second evaporator 340 in the fifth pipeline 750, and the refrigerant absorbs heat and evaporates in the second evaporator 340 to refrigerate the refrigerating chamber, so that the refrigerating chamber can be kept refrigerated while the freezing chamber is defrosted, and the food in the refrigerating chamber is in a normal fresh-keeping state.

As shown in fig. 3, in a fourth embodiment of the first aspect of the present utility model, the fourth embodiment is extended from the second embodiment, the pipeline assembly further includes a sixth pipeline 760, the second control valve 600 further includes a sixth outlet 630, two ends of the sixth pipeline 760 are respectively connected to the sixth outlet 630 and the second air return port 120, the sixth pipeline 760 is provided with a second throttling part 330 and the second evaporator 340, the fourth pipeline 740 is provided with a one-way valve 810, and the one-way valve 810 can prevent the refrigerant discharged by the second evaporator 340 from flowing back into the gas-liquid separator 800. By adding the sixth pipe 760, the second evaporator 340 is provided in the sixth pipe 760 for cooling the refrigerating chamber. The second control valve 600 in the fourth embodiment operates in the same manner as the control valve in the first embodiment.

Specifically, when the first control valve 500 is in the first working state and the second control valve 600 is in the first working state, the bypass pipeline assembly 400 is closed, the high-temperature and high-pressure refrigerant discharged by the compressor 100 is all introduced into the condenser 200, the temperature is reduced by the condenser 200 to obtain a medium-high-pressure refrigerant, the refrigerant is discharged from the condenser 200 and then introduced into the second control valve 600, a part of the refrigerant is introduced into the first throttling part 310 on the third pipeline 730, after the temperature and the pressure are reduced by the first throttling part 310, a part of the gaseous refrigerant possibly exists in the refrigerant at this time, the refrigerant introduced into the gas-liquid separator 800 through the first throttling part 310 is separated, and is introduced into the second air return port 120 through the fourth pipeline 740, the part of the gaseous refrigerant is introduced into the compressor 100 for compression and recycling through the second air return port 120, the liquid outlet of the gas-liquid separator 800 is discharged into the first evaporator 320, and the refrigerant introduced into the first evaporator 320 is basically liquid refrigerant, so that a larger refrigerating capacity can be provided, and the refrigerant introduced into the first evaporator 320 for compression and recycling through the first evaporator 110 is subjected to compression and heat absorption; another part of the refrigerant in the second control valve 600 is introduced into the sixth pipe 760, and the refrigerant sequentially flows through the second throttling part 330 and the second evaporator 340 in the sixth pipe 760, and the refrigerant absorbs heat and evaporates in the second evaporator 340 to cool the refrigerating chamber, and the refrigerant which absorbs heat and evaporates through the second evaporator 340 is introduced into the compressor 100 through the second return port 120 to be compressed and recycled.

In the above embodiment, when the first control valve 500 is in the second operating state and the second control valve 600 is in the second operating state, the second control valve 600 closes the connection between the first inlet 610 and the fifth outlet 620, the first inlet 610 and the sixth outlet 630 are in the communication state, and a part of the high-temperature and high-pressure refrigerant discharged from the compressor 100 enters the bypass line assembly 400 and then enters the first evaporator 320 to defrost the freezing chamber, and then enters the compressor 100 from the first return port 110 to circulate; the other part of the high-temperature and high-pressure refrigerant discharged from the compressor 100 enters the condenser 200 to dissipate heat, the refrigerant cooled by the condenser 200 is changed into a medium-temperature and high-pressure state, then the refrigerant enters the second control valve 600, at this time, the second control valve 600 controls the part of the refrigerant to enter the sixth pipeline 760, the refrigerant sequentially flows through the second throttling part 330 and the second evaporator 340 in the sixth pipeline 760, and the refrigerant absorbs heat and evaporates in the second evaporator 340 to refrigerate the refrigerating chamber, so that the refrigerating chamber can be kept refrigerated while the freezing chamber is defrosted, and the food in the refrigerating chamber is in a normal fresh-keeping state.

As shown in fig. 2 and 3, in some embodiments of the first aspect of the present utility model, a third throttling part 350 is further disposed on the third pipeline 730, and two ends of the third throttling part 350 are respectively connected to the liquid outlet of the gas-liquid separator 800 and the inlet of the first evaporator 320. The cooling capacity of the first evaporator 320 can be further increased by further reducing the pressure and temperature of the refrigerant using the third throttling part 350.

Specifically, the third throttling part 350 may be provided as a capillary tube, and the cost is low by throttling with the capillary tube. Of course, it is understood that the third throttling part 350 may be provided as an expansion valve, and may serve the purpose of reducing the temperature and pressure of the refrigerant.

A second aspect of the present utility model provides a refrigerator including an electric heater for heating and defrosting and a refrigeration system according to the first aspect, wherein the bypass line assembly 400 is embedded in the refrigerator body.

The compressor 100 having two return ports as described above can provide a sufficient cooling capacity for the first evaporator 320 in the case of using the conventional R600a/R290 refrigerant, and thus can provide a deep cooling mode for the refrigerator.

In summary, the refrigeration system of the above embodiment can provide a freezing function and a deep cooling function for the freezing chamber. When the refrigerating system provides a refrigerating function for the refrigerating chamber, at the moment, the moisture in the refrigerating chamber mainly completes frosting at the first evaporator 320 through the air path circulation, and the electric heater can be started to defrost the first evaporator 320; when the refrigerating system provides a deep cooling function for the freezing chamber, the temperature in the freezing chamber is extremely low, and moisture in the humid air is directly sublimated into frost on the interior decoration, so that the frosting amount at the evaporator is reduced when the deep cooling function is started compared with that of normal refrigeration. The reduction of the frosting amount means that a lower power can be used for defrosting, at this time, the first control valve 500 can be selectively opened, the high-temperature and high-pressure refrigerant output by the compressor 100 enters the first evaporator 320, and the frosting on the surface of the first evaporator 320 is subjected to heat exchange by using the high-temperature and high-pressure refrigerant in the first evaporator 320, so that the purpose of energy saving and defrosting is achieved.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A refrigeration system, the refrigeration system comprising:

the compressor is provided with a first air return port, a second air return port and an air outlet;

the inlet of the condenser is communicated with the air outlet;

The pipeline assembly is provided with a first inlet, a first outlet and a second outlet, the first inlet is communicated with the outlet of the condenser, the first outlet is communicated with the first air return port, and the second outlet is communicated with the second air return port;

The first throttling component and the first evaporator are arranged on the pipeline assembly;

The inlet of the bypass pipeline assembly is communicated with the air outlet or the outlet of the condenser, the outlet of the bypass pipeline assembly is communicated with the inlet of the first evaporator, and the bypass pipeline assembly is controlled to be opened and closed through a first control valve.

2. The refrigeration system of claim 1 wherein said first control valve has a second inlet in communication with said air outlet, a third outlet in communication with said condenser inlet, and a fourth outlet in communication with said bypass line assembly.

3. The refrigeration system of claim 2, wherein the piping assembly comprises a second control valve, a first piping, a second piping, the first inlet is disposed in the second control valve, the second control valve further has a fifth outlet and a sixth outlet, two ends of the first piping are respectively connected to the fifth outlet and the first return air port, two ends of the second piping are respectively connected to the sixth outlet and the second return air port, the first throttling element and the first evaporator are disposed in the first piping, and the second throttling element and the second evaporator are disposed in the second piping.

4. The refrigeration system of claim 2, wherein the piping assembly comprises a second control valve, a gas-liquid separator, a third piping and a fourth piping, the first inlet is disposed in the second control valve, the second control valve further has a fifth outlet, two ends of the third piping are communicated with the fifth outlet and the first return air port, the first throttling element, the gas-liquid separator and the first evaporator are disposed in the third piping, an inlet of the gas-liquid separator is communicated with an outlet of the first throttling element, a liquid outlet of the gas-liquid separator is communicated with an inlet of the first evaporator, and two ends of the fourth piping are respectively communicated with a gas outlet of the gas-liquid separator and the second return air port.

5. The refrigeration system as recited in claim 4 wherein said piping assembly further comprises a fifth piping, said second control valve further comprises a sixth outlet, two ends of said fifth piping are connected to said sixth outlet and said first return port, respectively, and said fifth piping is provided with a second throttling element and a second evaporator.

6. The refrigeration system as recited in claim 4 wherein said piping assembly further comprises a sixth piping, said second control valve further comprises a sixth outlet, two ends of said sixth piping are respectively connected to said sixth outlet and said second return port, a second throttling element and a second evaporator are provided on said sixth piping, and a check valve is provided on said fourth piping.

7. The refrigeration system as recited in claim 5 or 6 wherein a third throttling element is further provided on said third pipe, and both ends of said third throttling element are respectively connected to a liquid outlet of said gas-liquid separator and an inlet of said first evaporator.

8. The refrigeration system of claim 1, wherein the first control valve has a second inlet in communication with the outlet of the condenser, a third outlet in communication with the first inlet, and a fourth outlet in communication with the bypass line assembly.

9. A refrigeration system as set forth in claim 3, 5 or 6 wherein said first throttling member and said second throttling member are each provided as a capillary tube.

10. A refrigerator comprising an electric heater for heating defrost and the refrigeration system according to any one of claims 1 to 9.