Refrigerating system and refrigerating equipment

Abstract

The utility model discloses a refrigeration system and refrigeration equipment, and belongs to the field of refrigeration. The refrigerating system comprises a compressor and a heat exchanger. The heat exchanger comprises a first heat exchange pipe and a second heat exchange pipe, an inlet of the first heat exchange pipe is connected with an exhaust port of the compressor, the second heat exchange pipe comprises a first pipe part and a second pipe part which are located on different side faces of the box body, an outlet of the first pipe part is connected with an inlet of the second pipe part, and an outlet of the second pipe part is connected with an outlet of the compressor. An outlet of the second pipe part is connected with an air suction port of the compressor, at least part of the first pipe part and at least part of the first heat exchange pipe are located on the same side face of the box body, and at least part of the first pipe part is arranged on one side of the first heat exchange pipe so as to exchange heat with the first heat exchange pipe. The temperature of the refrigerant entering the inlet of the compressor can be reduced, so that the exhaust pressure of the refrigeration system in a steady state is reduced, and noise is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of refrigeration, and particularly relates to a refrigeration system and a refrigeration device. BACKGROUND

[0002] With the improvement of living standards, people's demand for refrigeration of refrigeration devices is gradually increasing. However, the refrigeration devices in the related art cannot meet people's growing demand for refrigeration, and need to be improved. CONTENT OF THE INVENTION

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a refrigeration system and a refrigeration device, which can reduce the temperature of the refrigerant entering the compressor inlet, thereby reducing the exhaust pressure of the refrigeration system in steady state and reducing noise.

[0004] In a first aspect, the present application provides a refrigeration system applied to a refrigeration device, wherein the refrigeration device comprises a cabinet, and the refrigeration system is installed in the cabinet, and the refrigeration system comprises:

[0005] a compressor;

[0006] a heat exchanger comprising a first heat exchange pipe and a second heat exchange pipe, wherein an inlet of the first heat exchange pipe is connected with an exhaust port of the compressor, the second heat exchange pipe comprises a first pipe section and a second pipe section located on different sides of the cabinet, an outlet of the first pipe section is connected with an inlet of the second pipe section, an outlet of the second pipe section is connected with a suction port of the compressor, at least part of the first pipe section and the first heat exchange pipe are located on the same side of the cabinet, and at least part of the first pipe section is arranged on one side of the first heat exchange pipe to exchange heat with the first heat exchange pipe.

[0007] According to the refrigeration system of the present application, by extending the second pipe section which does not exchange heat with the first heat exchange pipe to the other side of the cabinet, the length of the second pipe section can be extended, thereby extending the flow path length of the refrigerant before entering the inlet of the compressor, reducing the temperature of the refrigerant entering the inlet of the compressor, reducing the exhaust temperature and pressure of the compressor, improving the refrigeration efficiency, reducing the risk of compressor tripping, and reducing the noise of the whole machine.

[0008] According to one embodiment of the present application, at least one of the second pipe section and the first pipe section comprises a serpentine section, the serpentine section is arranged staggered with the first heat exchange pipe, and the outlet of the serpentine section is connected with the suction port of the compressor.

[0009] According to one embodiment of the present application, the first pipe section comprises a serpentine section, the second pipe section comprises an extension section, and the extension section is located between the serpentine section and the suction port of the compressor.

[0010] According to an embodiment of the present application, the second pipe section comprises a serpentine section, and the serpentine section and the first pipe section are located on adjacent sides of the cabinet.

[0011] According to an embodiment of the present application, the second heat exchange pipe further comprises a third pipe section, and the first pipe section, the second pipe section and the third pipe section are sequentially connected in the flow direction of the refrigerant, the outlet of the third pipe section is connected with the suction port of the compressor, the third pipe section and the first pipe section are located on different sides of the cabinet, the third pipe section and the second pipe section are located on the same side of the cabinet, at least part of the first heat exchange pipe is located on the same side of the cabinet as the third pipe section and is arranged on one side of the third pipe section, and the first heat exchange pipe exchanges heat with the third pipe section and then exchanges heat with the first pipe section.

[0012] According to an embodiment of the present application, the first heat exchange pipe comprises a first pipe section, a second pipe section and a third pipe section located between the first pipe section and the second pipe section, the first pipe section and the second pipe section are arranged on adjacent sides of the cabinet, the first pipe section and the first pipe section are arranged on the same side of the cabinet and on one side of part of the first pipe section to exchange heat with part of the first pipe section, the second pipe section and the third pipe section are located on the same side of the cabinet and are arranged on one side of the third pipe section, and the third pipe section is parallel to the intersection line of the adjacent sides.

[0013] According to an embodiment of the present application, the refrigeration system further comprises:

[0014] a compressor;

[0015] a condenser, the outlet of the compressor is connected with the inlet of the condenser, and the outlet of the condenser is connected with the inlet of the first heat exchange pipe;

[0016] a gas return pipe group comprising a first path and a second path, the outlet of the first heat exchange pipe is connected with the inlet of the first path;

[0017] an evaporator, the outlet of the first path is connected with the inlet of the evaporator, the outlet of the evaporator is connected with the inlet of the second path, and the outlet of the second path is connected with the inlet of the first pipe section.

[0018] According to an embodiment of the present application, the second path of the gas return pipe group and the second heat exchange pipe of the heat exchanger are formed by the same heat exchange pipe.

[0019] In a second aspect, the present application provides a refrigeration device comprising the refrigeration system according to any one of the above.

[0020] According to an embodiment of the present application, the refrigeration device comprises:

[0021] The enclosure, the inner liner, and the insulation layer located between the enclosure and the inner liner satisfy: 0≤L≤0.5H;

[0022] Where L is the distance between the second pipe section of the refrigeration system and the inner liner, and H is the thickness of the insulation layer.

[0023] According to the refrigeration equipment of this application, by extending the second pipe section, which does not exchange heat with the first heat exchange pipe, to the other side of the housing, the length of the second pipe section can be extended, thereby extending the flow path length of the refrigerant before entering the compressor inlet, thereby reducing the temperature of the refrigerant entering the compressor inlet, thereby reducing the discharge temperature and discharge pressure of the compressor, improving refrigeration efficiency, reducing the risk of compressor shutdown, and reducing the noise of the whole machine.

[0024] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is one of the structural schematic diagrams of the refrigeration system provided in the embodiments of this application;

[0027] Figure 2 This is a second schematic diagram of the refrigeration system provided in the embodiments of this application;

[0028] Figure 3 This is the third schematic diagram of the refrigeration system provided in the embodiments of this application;

[0029] Figure 4 This is the fourth schematic diagram of the refrigeration system provided in the embodiments of this application;

[0030] Figure 5 This is the fifth schematic diagram of the refrigeration system provided in the embodiments of this application;

[0031] Figure 6 This is the sixth schematic diagram of the refrigeration system provided in the embodiments of this application;

[0032] Figure 7 This is the seventh schematic diagram of the refrigeration system provided in the embodiments of this application;

[0033] Figure 8 This is the eighth schematic diagram of the refrigeration system provided in the embodiments of this application;

[0034] Figure 9 This is the ninth schematic diagram of the refrigeration system provided in the embodiments of this application.

[0035] Figure label:

[0036] Compressor 1, condenser 2, heat exchanger 3, first heat exchange tube 31, first tube section 311, second tube section 312, third tube section 313, second heat exchange tube 32, first tube section 321, second tube section 322, extension section 3221, serpentine section 3222, third tube section 323, return gas pipe group 4, first path 41, second path 42, evaporator 5. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0038] The following is for reference. Figures 1-9 This application describes a refrigeration system and refrigeration equipment according to embodiments thereof.

[0039] It should be noted that the refrigeration equipment in this embodiment can be understood as a broad refrigeration storage device, including but not limited to refrigerators, freezers, display cases, beverage cabinets, wine cabinets, refrigerated display cases, and refrigerated vending machines. Refrigeration equipment has diverse structural forms and a wide range of applications.

[0040] The refrigeration equipment includes a cabinet and a door. The cabinet includes an outer shell, an inner liner, and an insulation layer located between the outer shell and the inner liner. The outer shell covers the inner liner and provides protection. The insulation layer can be a foam layer, which provides insulation and cushioning. The space between the outer shell and the inner liner forms a compartment for housing machines such as compressors and circuit breakers.

[0041] The refrigeration system of this application embodiment is applied to a refrigeration device. The refrigeration device includes a cabinet, and the refrigeration system is installed in the cabinet. The refrigeration system can be disposed between the outer shell and the inner liner. The inner liner forms a storage compartment, and the refrigeration system is used to refrigerate the storage compartment formed by the refrigeration system.

[0042] like Figure 1 As shown, the refrigeration system includes: compressor 1 and heat exchanger 3.

[0043] Among them, compressor 1 is responsible for compressing refrigerant gas, increasing the temperature and pressure of the refrigerant, and providing power for the refrigeration cycle.

[0044] like Figure 1 and Figure 2 As shown, the heat exchanger 3 includes a first heat exchange tube 31 and a second heat exchange tube 32. The inlet of the first heat exchange tube 31 is adapted to be connected to the exhaust port of the compressor 1, and the outlet of the second heat exchange tube 32 is adapted to be connected to the suction port of the compressor 1.

[0045] The refrigeration system also includes a condenser 2, and the exhaust port of the compressor 1 is connected to the inlet of the first heat exchange tube 31 through the condenser 2. The outlet of the first heat exchange tube 31 is adapted to be connected to the evaporator 5 of the refrigeration system, the outlet of the evaporator 5 is adapted to be connected to the inlet of the second heat exchange tube 32, and the outlet of the second heat exchange tube 32 is connected to the suction port of the compressor 1.

[0046] In this process, at least a portion of the first heat exchange tube 31 and the second heat exchange tube 32 exchange heat, wherein the first heat exchange tube 31 is a high-temperature tube and the second heat exchange tube 32 is a low-temperature tube.

[0047] like Figure 2 As shown, the second heat exchange tube 32 includes a first tube portion 321 and a second tube portion 322 located on different sides of the housing. The first tube portion 321 and the second tube portion 322 can be located on adjacent sides of the housing or on alternate sides of the housing.

[0048] The outlet of the first pipe section 321 is connected to the inlet of the second pipe section 322. The refrigerant flows through the first pipe section 321 and the second pipe section 322 in sequence. The outlet of the second pipe section 322 is adapted to be connected to the suction port of the compressor 1. The temperature of the refrigerant in the second pipe section 322 is positively correlated with the inlet temperature of the compressor 1. The lower the temperature of the refrigerant in the second pipe section 322, the lower the inlet temperature of the compressor 1 and the lower the discharge temperature of the compressor 1, thereby reducing the noise of the compressor 1 and thus reducing the overall noise of the refrigeration equipment.

[0049] like Figure 4 and Figure 8 As shown, at least a portion of the first tube 321 and the first heat exchange tube 31 are located on the same side of the housing. For example, portions of the first tube 321 and the first heat exchange tube 31 may both be located on the back of the housing, or portions of the first tube 321 and the first heat exchange tube 31 may both be located on the front or left and right sides of the housing.

[0050] At least a portion of the first tube section 321 is disposed on one side of a portion of the first heat exchange tube 31 for heat exchange with at least a portion of the first heat exchange tube 31.

[0051] In this embodiment, at least a portion of the projection of the first tube 321 along the first direction coincides with the projection of the first heat exchange tube 31 along the first direction so as to exchange heat with the first heat exchange tube 31.

[0052] The first direction can be any direction.

[0053] For example, the first direction can be a direction perpendicular to the surface of the inner liner, that is, the orthographic projection of the first tube portion 321 in the inner liner coincides with the orthographic projection of the first heat exchange tube 31 in the inner liner, that is, a portion of the first tube portion 321 and the first heat exchange tube 31 are arranged side by side along the thickness direction of the insulation layer; or, the first direction can be a height direction, that is, the projection of the first tube portion 321 along the height direction coincides with the projection of the first heat exchange tube 31 along the height direction, that is, a portion of the first tube portion 321 and the first heat exchange tube 31 are arranged side by side along the height direction.

[0054] In this embodiment, at least a portion of the first tube portion 321 is adjacent to the first tube portion 321, and at least a portion of the first tube portion 321 is close to or close to the first tube portion 321. In other words, at least a portion of the first tube portion 321 is arranged side by side with the first tube portion 321.

[0055] Among them, such as Figure 7 and Figure 9 As shown, the second tube section 322 and the first heat exchange tube 31 are located on different sides of the housing. In other words, the heat exchange between the second tube section 322 and the first heat exchange tube 31 is small, or the second tube section 322 and the first heat exchange tube 31 do not exchange heat. That is, after the first tube section 321 of the second heat exchange tube 32 exchanges heat with the first heat exchange tube 31, the second tube section 322 of the second heat exchange tube 32 extends to a different side from the first heat exchange tube 31. The length of the second tube section 322 can be extended, thereby reducing the temperature of the refrigerant in the second tube section 322, thereby reducing the temperature of the refrigerant entering the inlet of the compressor 1.

[0056] It should be noted that refrigerant pressure and temperature are positively correlated; the higher the temperature, the greater the pressure. The compressor temperature and noise level are also positively correlated; the higher the compressor's suction or outlet temperature, the louder the compressor noise and the louder the overall machine noise.

[0057] According to the refrigeration system provided in the embodiments of this application, by extending the second pipe portion 322, which does not exchange heat with the first heat exchange pipe 31, to the other side of the housing, the length of the second pipe portion 322 can be extended, thereby extending the flow path length of the refrigerant before entering the compressor 1 inlet, thereby reducing the temperature of the refrigerant entering the compressor 1 inlet, thereby reducing the discharge temperature and discharge pressure of the compressor 1, improving refrigeration efficiency, reducing the risk of compressor 1 tripping, and reducing the noise of the whole machine.

[0058] In some embodiments, such as Figure 2 and Figure 6 As shown, at least one of the second tube section 322 and the first tube section 321 includes a serpentine section 3222, which is offset from the first heat exchange tube 31, and the outlet of the serpentine section 3222 is adapted to be connected to the suction port of the compressor 1.

[0059] The serpentine tube is staggered from the first heat exchange tube 31 to reduce the thermal interference of the first heat exchange tube 31 on the serpentine section 3222, thereby reducing the heat exchange between the serpentine section 3222 and the first heat exchange tube 31.

[0060] In this embodiment, the pipe connected to the suction port of compressor 1 is set as a serpentine section 3222, which can reduce the installation space and further extend the length of the second pipe section 322, thereby further extending the flow path length of the refrigerant before entering the inlet of compressor 1, thereby further reducing the temperature of the refrigerant entering the inlet of compressor 1.

[0061] The serpentine segment 3222 can be set in at least the following three locations:

[0062] Firstly, such as Figure 6 As shown, the second tube section 322 includes a serpentine section 3222. The serpentine section 3222 of the second tube section 322 and the first heat exchange tube 31 are located on different sides of the housing. The serpentine section 3222 of the second tube section 322 and the first tube section 321 can be located on adjacent sides of the housing or on alternate sides of the housing. See [reference needed]. Figure 7 and Figure 8 .

[0063] In this embodiment, the second tube 322 is partially or completely bent to form a serpentine segment 3222, which can further extend the length of the second tube 322. By distributing the serpentine segment 3222 of the second tube 322 and the first tube 321 on different sides of the housing, the distance between the serpentine segment 3222 and the first heat exchange tube 31 can be increased, reducing the heat exchange between the serpentine segment 3222 and the first heat exchange tube 31. At the same time, the side space can be fully utilized to increase the length of the serpentine segment 3222, which facilitates extending the bending length of the serpentine segment 3222, thereby further extending the flow path length of the refrigerant before it enters the compressor 1 inlet.

[0064] Secondly, such as Figure 2 and Figure 4 As shown, the first tube section 321 includes a serpentine section 3222, which is offset from the first heat exchange tube 31.

[0065] Among them, such as Figure 4 As shown, the serpentine section 3222 of the first tube 321 and the first heat exchange tube 31 are located on the same side of the housing, and the serpentine section 3222 and the first heat exchange tube 31 are staggered to reduce the thermal interference of the first heat exchange tube 31 on the serpentine section 3222.

[0066] In this embodiment, the serpentine section 3222 and the first heat exchange tube 31 are placed on the same side of the housing, which can reduce the installation difficulty and extend the flow path length of the refrigerant before it enters the compressor 1 inlet.

[0067] Third, both the second tube section 322 and the first tube section 321 include a serpentine section 3222. The serpentine section 3222 of the second tube section 322 and the first heat exchange tube 31 are located on different sides of the housing, while the serpentine section 3222 of the first tube section 321 and the first heat exchange tube 31 are located on the same side of the housing.

[0068] In this embodiment, the pipeline connected to the suction port of compressor 1 is provided with two serpentine sections 3222, which can further extend the flow path length of the refrigerant before it enters the inlet of compressor 1, thereby further reducing the temperature of the refrigerant entering the inlet of compressor 1.

[0069] The first pipeline and the second pipeline shall include at least the following two structures.

[0070] Firstly, such as Figure 2 As shown, the first pipe section 321 includes a serpentine section 3222, and the second pipe section 322 includes an extension section 3221, which is located between the serpentine section 3222 and the intake port of the compressor 1.

[0071] Among them, such as Figure 4 and Figure 5 As shown, the extension section 3221 and the serpentine section 3222 are located on different sides of the housing, the serpentine section 3222 and the first pipe section 321 are located on the same side of the housing, the outlet of the serpentine section 3222 is connected to the inlet of the extension section 3221, and the outlet of the extension section 3221 is connected to the suction port of the compressor 1.

[0072] Among them, the extension section 3221 can be a heat exchange tube with a small number of bends, and the number of bends is not less than 1.

[0073] In this embodiment, the pipeline connected to the suction port of compressor 1 is provided with an extension section 3221 and a serpentine section 3222. This can further extend the flow path length of the refrigerant before it enters the compressor 1 inlet, so that the amount of refrigerant contained in the second heat exchange tube 32 remains unchanged. It can also reduce the installation difficulty, increase the number of fixing points between the second tube 322 and the housing, and reduce the difficulty of positioning the second tube 322 and the housing.

[0074] Secondly, such as Figure 6 As shown, the second pipe section 322 includes a serpentine section 3222, which can extend the flow path of the refrigerant to the suction port of the compressor 1, so that the temperature of the refrigerant is reduced more, thereby reducing the temperature of the refrigerant reaching the suction port of the compressor 1.

[0075] Among them, such as Figure 7 , Figure 8 and Figure 9As shown, the serpentine section 3222 and the first pipe section 321 are located on adjacent sides of the housing, which can make full use of the side space and increase the length of the serpentine section 3222, thereby further extending the flow path length of the refrigerant before it enters the compressor 1 inlet.

[0076] In this embodiment, the second tube 322 can be formed entirely as a serpentine segment 3222, or it can be formed partially as a serpentine segment 3222.

[0077] Among them, such as Figure 8 As shown, the first tube section 321 is disposed on one side of the first heat exchange tube 31, and the entire first tube section 321 can be arranged side by side with the first heat exchange tube 31 so that the entire first tube section 321 exchanges heat with the first heat exchange tube 31.

[0078] In some embodiments, such as Figure 5 and Figure 7 As shown, the second heat exchange tube 32 also includes a third tube section 323. Along the refrigerant flow direction, the first tube section 321, the second tube section 322 and the third tube section 323 are connected in sequence. The outlet of the third tube section 323 is connected to the suction port of the compressor 1. The third tube section 323 and the first tube section 321 are located on different sides of the housing, and the third tube section 323 and the second tube section 322 are located on the same side of the housing.

[0079] like Figure 3 and Figure 5 As shown, at least a portion of the first heat exchange tube 31 is located on the same side of the housing as the third tube section 323 and is disposed on one side of the third tube section 323. The first heat exchange tube 31 exchanges heat with the third tube section 323 and then exchanges heat with the first tube section 321.

[0080] At least a portion of the first heat exchange tube 31 is located on the same side as the first tube section 321 to facilitate heat exchange with the first tube section 321. At least a portion of the first heat exchange tube 31 is located on the same side as the third tube section 323 to facilitate the exit of the cabin from the inlet of the first heat exchange tube 31 and the outlet of the third tube section 323, while also facilitating the installation of the third tube section 323 and the first heat exchange tube 31.

[0081] In some embodiments, such as Figure 2 As shown, the first heat exchange tube 31 includes a first tube section 311, a second tube section 312, and a third tube section 313 located between the first tube section 311 and the second tube section 312.

[0082] like Figure 3 and Figure 4 as well as Figure 7 and Figure 8 As shown, the first pipe section 311 and the second pipe section 312 are respectively located on adjacent sides of the box.

[0083] like Figure 4 and Figure 8As shown, the first section 311 of the first heat exchange tube 31 and the first tube portion 321 of the second heat exchange tube 32 are disposed on the same side of the housing and disposed on one side of a portion of the first tube portion 321 to exchange heat with a portion of the first tube portion 321.

[0084] The first pipe section 311 and the first pipe portion 321 are arranged side by side to facilitate heat exchange between the refrigerant in the first pipe section 311 and the first pipe portion 321.

[0085] like Figure 5 and Figure 7 As shown, the second pipe section 312 and the third pipe section 323 are located on the same side of the housing and are disposed on one side of the third pipe section 323.

[0086] The second pipe section 312 and the third pipe section 323 are arranged side by side to facilitate the installation of the first heat exchange pipe 31 and the second heat exchange pipe 32, and also to facilitate the exit of the inlet of the second pipe section 312 and the outlet of the third pipe section 323 from the nacelle.

[0087] like Figure 2 and Figure 6 As shown, the intersection line of the third pipe segment 313 and the adjacent side is parallel. The extension direction of the intersection line of the adjacent side of the box where the first pipe segment 311 and the second pipe segment 312 are respectively located is parallel to the extension direction of the third pipe segment 313. The intersection line of the third pipe segment 313 and the adjacent side is arranged side by side, which can make full use of the gap between the inner liner and the outer shell to realize the connection between the first pipe segment 311 and the second pipe segment 312.

[0088] The third pipe section 313 can extend along the height direction or along the horizontal direction. In practical applications, it can be determined based on the distribution of the first pipe section 311 and the second pipe section 312.

[0089] In some embodiments, such as Figure 1 As shown, the refrigeration system also includes:

[0090] The exhaust port of the compressor 1 is connected to the inlet of the condenser 2, and the outlet of the condenser 2 is connected to the inlet of the first heat exchange tube 31.

[0091] The return gas pipe group 4 includes a first line 41 and a second line 42, and the outlet of the first heat exchange pipe 31 is connected to the inlet of the first line 41.

[0092] Evaporator 5, the outlet of the first channel 41 is connected to the inlet of evaporator 5, the outlet of evaporator 5 is connected to the inlet of the second channel 42, and the outlet of the second channel 42 is connected to the inlet of the first tube section 321.

[0093] The refrigerant in the refrigeration system can be a mixed refrigerant. The high-boiling-point refrigerant in the mixed refrigerant can be any one of R600a, R600, R290, R1270, R1243zf, R1234yf, R1234ze, or R1150, and the low-boiling-point refrigerant can be one of R170, R1150, R23, or R14.

[0094] In some embodiments, a drying filter is provided between the condenser 2 and the first heat exchange tube 31. The drying filter is used to filter out moisture and impurities in the refrigerant entering the first heat exchange tube 31 of the heat exchanger 3.

[0095] In some embodiments, the first path 41 of the return gas pipe group 4 is a capillary tube, which is used for throttling and pressure reduction.

[0096] The working principle of the refrigeration system: The refrigerant is compressed into a high-temperature, high-pressure mixed refrigerant gas by compressor 1. The mixed refrigerant gas enters condenser 2 and is condensed into a two-phase (gas-liquid) binary mixed refrigerant. It then enters a dryer filter to remove moisture and impurities. The two-phase (gas-liquid) binary mixed refrigerant enters the first heat exchange tube 31 of heat exchanger 3, where it exchanges heat with the second heat exchange tube 32 for further condensation. The binary mixed refrigerant enters a capillary tube for throttling and pressure reduction, and exchanges heat with the second path 42 in the return gas pipe group 4, further cooling the binary mixed refrigerant. After entering evaporator 5, the refrigerant forms a two-phase (gas-liquid) binary mixed refrigerant. The outlet of evaporator 5... The mixed refrigerant exists in a gas-liquid two-phase state. This gas-liquid two-phase binary mixed refrigerant exchanges heat with the capillary tube through the second path 42 in the return gas pipe group 4, thereby cooling the refrigerant in the capillary tube. The outlet of the second path 42 in the return gas pipe group 4 is still a gas-liquid two-phase state. The refrigerant enters the first heat exchange tube 31 of the heat exchanger 3 and exchanges heat with the second heat exchange tube 32 of the heat exchanger 3, causing the refrigerant in the first heat exchange tube 31 to cool down and condense. The outlet of the second heat exchange tube 32 is in a gaseous state. Since the second tube section 322 of the second heat exchange tube 32 is extended, the temperature of the refrigerant at the outlet of the second heat exchange tube 32 can be reduced. The cooled gaseous refrigerant returns to the compressor 1 to complete one cycle.

[0097] The pressure reduction principle of the refrigeration system: Heat exchanger 3 is composed of a first heat exchange tube 31 and a second heat exchange tube 32. High-temperature, high-pressure gas-liquid two-phase refrigerant enters the inlet of the first heat exchange tube 31 after exiting the condenser 2, flowing through the first heat exchange tube 31 and into the capillary inlet. The refrigerant entering the second heat exchange tube 32 is a low-temperature, low-pressure gas-liquid two-phase refrigerant. Due to the temperature difference between the first heat exchange tube 31 and the second heat exchange tube 32, heat exchange occurs, with the temperature of the refrigerant in the first heat exchange tube 31 decreasing and the temperature of the refrigerant in the second heat exchange tube 32 increasing. The temperature of the refrigerant entering the first heat exchange tube 31 is above ambient temperature, while after heat exchange, the temperature of the refrigerant at the outlet of the first heat exchange tube 31 decreases significantly, ranging from +32°C to -10°C. Refrigerant pressure and temperature are positively correlated; the higher the temperature, the greater the pressure. Therefore, the discharge pressure of the refrigeration system of this application is significantly lower than that of a conventional single-stage compression refrigeration system.

[0098] The refrigeration system of this application, on the one hand, by setting up a heat exchanger 3 and a return gas pipe group 4, the refrigerant discharged from the condenser 2 first undergoes heat exchange at the heat exchanger 3, the temperature of the refrigerant decreases, and then enters the evaporator 5 for further heat exchange through the throttling and pressure reduction effect of the capillary tube of the return gas pipe group 4; on the other hand, by setting an extension and a serpentine section 3222 on the second heat exchange tube 32, the temperature of the refrigerant entering the inlet of the compressor 1 can be reduced, the refrigeration effect can be improved, the pressure of the compressor 1 can be reduced, the discharge pressure of the refrigeration system in steady state can be reduced, and the noise of the whole machine can be reduced.

[0099] In some embodiments, the second path 42 of the return gas pipe group 4 and the second heat exchange tube 32 of the heat exchanger 3 are formed by the same heat exchange pipe.

[0100] Among them, the second path 42 of the return gas pipe group 4 and the first pipe section 311, the second pipe section 312 and the third pipe section 313 share a heat exchange pipe. The heat exchange pipe can be bent and extended to form the second path 42 of the return gas pipe group 4 and the second heat exchange pipe 32 of the heat exchanger 3.

[0101] The compressor 1's exhaust port is connected to the condenser 2's inlet; the heat exchanger 3 includes a first heat exchange tube 31 and a second heat exchange tube 32, and the condenser 2's outlet is connected to the first heat exchange tube 31's inlet; the return gas pipe group 4 includes a first path 41 and a second path 42, and the first heat exchange tube 31's outlet is connected to the first path 41's inlet; the first path 41's outlet is connected to the evaporator 5's inlet, the evaporator 5's outlet is connected to the second path 42's inlet, the second path 42's outlet is connected to the second heat exchange tube 32's inlet, and the second heat exchange tube 32's outlet is connected to the compressor 1's suction port.

[0102] It should be noted that heat exchanger 3 and return gas pipe assembly 4 are two refrigeration components at the refrigeration system level. Heat exchanger 3 consists of a first heat exchange tube 31 (high-temperature tube) and a second heat exchange tube 32 (low-temperature tube), while the return gas pipe assembly consists of a first path 41 (capillary tube) and a second path 42 (return gas pipe). In related technologies, if the structure connecting heat exchanger 3 and return gas pipe assembly 4 is used, the connecting pipes between heat exchanger 3 and return gas pipe assembly 4 are generally welded. This results in complex processes and a risk of refrigerant leakage, leading to poor refrigeration and substandard refrigeration temperature. Furthermore, since heat exchanger 3 and return gas pipe assembly 4 are installed separately within the foaming layer, they are prone to tilting, causing condensation in the refrigeration equipment.

[0103] The first heat exchange tube 31 of the heat exchanger 3 and the first line 41 of the return gas pipe group 4 can be welded together to form an integral unit, thereby integrating the heat exchanger 3 and the return gas pipe group 4. This allows the heat exchanger 3 and the return gas pipe group 4 to be installed together on the outside of the inner liner, reducing the tilting of the heat exchanger 3 and the return gas pipe group 4, improving the stability of their positions, and reducing condensation caused by tilting.

[0104] According to the refrigeration system provided in this application, by setting the second path 42 of the return gas pipe group 4 and the second heat exchange tube 32 of the heat exchanger 3 to be formed by the same heat exchange pipe, the process can be simplified, the risk of refrigerant leakage can be reduced, and the reliability and safety of the refrigeration system can be improved.

[0105] In some embodiments, the heat exchange pipeline includes a serpentine section extending in a second direction, with the first heat exchange tube 31 extending along a portion of the serpentine section and the first path 41 extending along another portion of the serpentine section.

[0106] Among them, the first heat exchange tube 31 and the first path 41 extend in the same direction as the corresponding part of the heat exchange tube.

[0107] The second direction can be the height of the refrigeration equipment, or the width or length of the refrigeration equipment. When the heat exchange pipes are located on the side of the refrigeration equipment, the second direction is the height of the refrigeration equipment; when the heat exchange pipes are located on the bottom of the refrigeration equipment, the second direction can be the length of the refrigeration equipment.

[0108] In this embodiment, the first heat exchange tube 31, the first path 41, and the heat exchange pipeline are configured in a serpentine bend and extension shape, which can increase the heat exchange length and heat exchange area between the first heat exchange tube 31 and the heat exchange pipeline, as well as between the first path 41 and the heat exchange pipeline, thereby improving the heat exchange efficiency.

[0109] This application also provides a refrigeration device, including any of the above-described refrigeration systems.

[0110] According to the refrigeration equipment provided in the embodiments of this application, by extending the second pipe portion 322, which does not exchange heat with the first heat exchange pipe 31, to the other side of the housing, the length of the second pipe portion 322 can be extended, thereby extending the flow path length of the refrigerant before entering the compressor 1 inlet, thereby reducing the temperature of the refrigerant entering the compressor 1 inlet, thereby reducing the discharge temperature and discharge pressure of the compressor 1, improving refrigeration efficiency, reducing the risk of compressor 1 tripping, and reducing the noise of the whole machine.

[0111] In some embodiments, the refrigeration device includes: a housing, an inner liner, and an insulation layer located between the housing and the inner liner, satisfying: 0≤L≤0.5H; where L is the distance between the second pipe section 322 of the refrigeration system and the inner liner, and H is the thickness of the insulation layer.

[0112] For example, the distance between the second tube 322 and the inner liner can be 0, that is, the second tube 322 is in contact with the inner liner; or, the distance between the second tube 322 and the inner liner can be 0.2H, that is, the distance between the second tube 322 and the inner liner is relatively small.

[0113] In this embodiment, after the length of the second pipe section 322 is increased, the position of the second pipe section 322 can be set at 0 to 0.5H of the insulation layer thickness. The temperature of this thickness tends to increase from the inner liner to the 0.5H insulation layer, but it is lower than the temperature of the refrigerant in the second pipe section 322 on the side. By extending the extension length of the second pipe section 322, the temperature of the refrigerant in the second pipe section 322 can be reduced, thereby reducing the temperature reaching the suction port of the compressor 1, while having a smaller impact on the storage temperature of the storage compartment.

[0114] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0115] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0116] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0117] In the description of this application, "multiple" means two or more.

[0118] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0119] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0121] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A refrigeration system, characterized in that, Applied to refrigeration equipment, the refrigeration equipment includes a housing, and the refrigeration system is installed in the housing. The refrigeration system includes: compressor; A heat exchanger includes a first heat exchange tube and a second heat exchange tube. The inlet of the first heat exchange tube is connected to the exhaust port of the compressor. The second heat exchange tube includes a first tube section and a second tube section located on different sides of the housing. The outlet of the first tube section is connected to the inlet of the second tube section, and the outlet of the second tube section is connected to the suction port of the compressor. At least a portion of the first tube section and the first heat exchange tube are located on the same side of the housing, and at least a portion of the first tube section is disposed on one side of the first heat exchange tube for heat exchange with the first heat exchange tube.

2. The refrigeration system according to claim 1, characterized in that, At least one of the second tube section and the first tube section includes a serpentine section, which is offset from the first heat exchange tube, and the outlet of the serpentine section is connected to the suction port of the compressor.

3. The refrigeration system according to claim 2, characterized in that, The first pipe section includes a serpentine section, and the second pipe section includes an extension section located between the serpentine section and the compressor's intake port.

4. The refrigeration system according to claim 2, characterized in that, The second tube includes a serpentine section, which is located on an adjacent side of the housing, along with the first tube.

5. The refrigeration system according to claim 1, characterized in that, The second heat exchange tube also includes a third tube section. Along the refrigerant flow direction, the first tube section, the second tube section, and the third tube section are connected sequentially. The outlet of the third tube section is connected to the suction port of the compressor. The third tube section and the first tube section are located on different sides of the housing. The third tube section and the second tube section are located on the same side of the housing. At least a portion of the first heat exchange tube is located on the same side of the housing as the third tube section and is disposed on one side of the third tube section. The first heat exchange tube exchanges heat with the third tube section and then exchanges heat with the first tube section.

6. The refrigeration system according to claim 5, characterized in that, The first heat exchange tube includes a first tube segment, a second tube segment, and a third tube segment located between the first tube segment and the second tube segment. The first tube segment and the second tube segment are respectively disposed on adjacent sides of the housing. The first tube segment and the first tube portion are disposed on the same side of the housing and on one side of a portion of the first tube portion to exchange heat with a portion of the first tube portion. The second tube segment and the third tube portion are located on the same side of the housing and on one side of the third tube portion. The intersection line of the third tube segment and the adjacent side is parallel.

7. The refrigeration system according to any one of claims 1-6, characterized in that, The refrigeration system also includes: The compressor's exhaust port is connected to the condenser's inlet, and the condenser's outlet is connected to the inlet of the first heat exchange tube. The return gas pipe assembly includes a first line and a second line, with the outlet of the first heat exchange pipe connected to the inlet of the first line. The evaporator has its first outlet connected to its inlet, its outlet connected to its second inlet, and its outlet connected to the inlet of the first tube.

8. The refrigeration system according to claim 7, characterized in that, The second path of the return gas pipe group and the second heat exchange tube of the heat exchanger are formed by the same heat exchange pipe.

9. A refrigeration device, characterized in that, The refrigeration system included in any one of claims 1-8.

10. The refrigeration equipment according to claim 9, characterized in that, The refrigeration equipment includes: The enclosure, the inner liner, and the insulation layer located between the enclosure and the inner liner satisfy: 0≤L≤0.5H; Where L is the distance between the second pipe section of the refrigeration system and the inner liner, and H is the thickness of the insulation layer.

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