Refrigerating system and refrigerating equipment
By introducing an energy storage device into the refrigeration system to exchange heat with the condenser, the problems of condensation and frost formation on the condenser and liquid slugging on the compressor are solved, realizing mutual utilization of energy, reducing system energy consumption and improving efficiency.
Patent Information
- Application Number
- CN202520128408.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-17
AI Technical Summary
During the defrosting process, existing refrigeration equipment may experience condensation and frost formation on the condenser and liquid slugging on the compressor, leading to increased energy consumption and reduced system efficiency.
Introducing an energy storage device into the refrigeration system allows for heat exchange with the condenser, storing cold or heat energy. The energy storage device can be used to lower or raise the condenser temperature during the defrost cycle, reducing the risk of condensation and frost formation. Furthermore, energy can be stored through phase change materials, ensuring full utilization of energy during refrigeration and defrosting.
It reduces the likelihood of condensation and frosting on the condenser, reduces the risk of liquid slugging in the compressor, lowers the overall energy consumption of the system, and improves energy utilization efficiency.
Smart Images
Figure CN223691341U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of refrigeration, and more particularly, to a refrigeration system and a refrigeration device. BACKGROUND
[0002] In the operation process of a refrigeration device such as a refrigerator, frost will be formed on the surface of an evaporator due to low temperature, which affects the heat exchange efficiency. In order to solve this problem, the related technology adopts a heat pump defrosting mode for defrosting. The heat pump defrosting mainly utilizes a refrigeration reverse cycle, takes the evaporator as a condenser of the heat pump cycle, and makes the high-temperature gas discharged by a compressor flow to the frost-covered evaporator to be condensed and heat-released to be cooled, then flows to a throttling element to be cooled, and finally flows to a condenser to exchange heat with the environment, is evaporated to be gaseous refrigerant, and returns to the compressor. During normal refrigeration, the throttling element can hinder, restrict and depress the refrigerant flowing therethrough to improve the heat exchange efficiency of the evaporator. However, in the heat pump defrosting cycle, the temperature of the refrigerant flowing out of the evaporator is relatively low, the temperature is further reduced after being cooled by the throttling element, and the temperature of the condenser surface may be too low to cause condensation or even frost formation after the refrigerant enters the condenser. Meanwhile, the refrigerant may not be completely evaporated from liquid to gas, which finally causes liquid strike to the compressor. CONTENT OF THE UTILITY MODEL
[0003] The purpose of the present application is to provide a refrigeration system and a refrigeration device, which can realize mutual full utilization of energy during refrigeration and defrosting, reduce the possibility of condensation and frost formation of the condenser or liquid strike to the compressor, and reduce the overall energy consumption of the system.
[0004] In a first aspect, the present application provides a refrigeration system, comprising: a refrigeration assembly comprising a compressor, a condenser, a throttling element and an evaporator arranged in sequence along a refrigeration cycle loop; a reversing valve connected with the compressor, the condenser and the evaporator through pipelines, the reversing valve being configured to adjust the flow direction of the refrigerant in the refrigeration cycle loop, so as to switch the refrigeration system between a refrigeration cycle mode and a defrosting cycle mode; and an energy storage device arranged on one side of the condenser, the energy storage device being used for heat exchange with the condenser to store cold or heat.
[0005] According to the refrigeration system provided by the embodiments of the present application, the energy storage device is arranged adjacent to the condenser, and is used for heat exchange with the condenser to store cold or heat. In the refrigeration cycle mode, the energy storage device can absorb and store the heat released by the condenser, and utilize the cold stored in the defrosting cycle mode to reduce the temperature of the condenser. In the defrosting cycle mode, the energy storage device can store the cold of the condenser, and utilize the heat stored in the refrigeration cycle mode to increase the temperature of the condenser, thereby reducing the risk of condensation and frost formation of the condenser, and reducing the possibility of liquid strike to the compressor caused by incomplete evaporation of the refrigerant. Finally, the mutual full utilization of energy during refrigeration and defrosting is realized, and the overall energy consumption of the system is reduced.
[0006] In addition, the refrigeration system according to the present application can further have the following additional technical features:
[0007] In some embodiments of the present application, the energy storage device comprises an outer cover and a phase change material arranged in the outer cover, the phase change material being used for storing heat or cold.
[0008] In some embodiments of the present application, the refrigeration assembly further comprises a sensor assembly for monitoring the temperature of the condenser and the temperature of the energy storage device, and a fan arranged to adjust the speed of rotation according to the temperature of the condenser and the temperature of the energy storage device.
[0009] In some embodiments of the present application, the compressor comprises a shell having an inner cavity, a muffler, a cylinder and a high-pressure chamber arranged in the inner cavity and in communication with each other, the shell being provided with a plurality of return gas pipes, exhaust pipes and process pipes arranged at intervals, the return gas pipes being in communication with the cavity of the muffler, the exhaust pipes being in communication with the high-pressure chamber, and the process pipes being in communication with the inner cavity; the refrigeration system further comprises a switching valve configured to selectively connect the reversing valve and the process pipes, so that the refrigerant discharged from the exhaust pipes of the compressor defrosts the evaporator, the defrosted refrigerant flows through the condenser and the process pipes into the inner cavity of the compressor, and the refrigerant is preheated.
[0010] In some embodiments of the present application, the switching valve comprises an inlet, a first outlet and a second outlet, the inlet being connected to the reversing valve, the first outlet being connected to the return gas pipes, and the second outlet being connected to the process pipes.
[0011] In some embodiments of the present application, the switching valve comprises a first valve body arranged on the pipeline where the return gas pipes are arranged, and a second valve body arranged on the pipeline where the process pipes are arranged.
[0012] In some embodiments of the present application, the muffler is provided with an air inlet, the high-pressure chamber is provided with an air outlet, one end of the return gas pipe extending into the inner cavity is arranged opposite to and spaced apart from the air inlet, one end of the exhaust pipe extending into the inner cavity is connected to the air outlet through a pipeline, and one end of the process pipe extending into the inner cavity is spaced apart from the air inlet by a predetermined distance.
[0013] In some embodiments of the present application, the shell comprises a lower shell and an upper shell covering the lower shell, the return gas pipes, the exhaust pipes and the process pipes are arranged on the lower shell, and the return gas pipes and the exhaust pipes are arranged adjacent to each other.
[0014] In some embodiments of the present application, the refrigeration system further comprises a heater arranged on the pipeline where the process pipes are arranged.
[0015] In some embodiments of the present application, in the refrigeration cycle mode, the switching valve is further configured to connect the inlet and the first outlet, so that the refrigerant discharged from the exhaust pipe of the compressor flows through the condenser, the throttling element and the evaporator in sequence, and returns to the gas return pipe of the compressor.
[0016] In some embodiments of the present application, the refrigeration assembly further comprises a filter, which is arranged in the refrigeration cycle loop and located between the condenser and the throttling element.
[0017] In the second aspect, the present application provides a refrigeration device comprising the refrigeration system of any of the embodiments of the present application.
[0018] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the contents of the specification can be implemented, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS
[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numbers in the entire drawings indicate the same components. Among them:
[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numbers in the entire drawings indicate the same components. Among them:
[0021] Figure 1 The structure schematic diagram of the refrigeration system of an embodiment of the present application is shown in the figure;
[0022] Figure 2 The structure schematic diagram of the refrigeration system of another embodiment of the present application is shown in the figure;
[0023] Figure 3 The structure schematic diagram of the refrigeration system of another embodiment of the present application is shown in the figure; Figure 2 The structure schematic diagram of the compressor of the refrigeration system shown in the figure is shown in the figure;
[0024] Figure 4 The structure schematic diagram of the compressor of the refrigeration system shown in the figure is shown in the figure; Figure 3 The structure schematic diagram of the compressor of the refrigeration system shown in the figure is shown in the figure;
[0025] The various signs in the drawings represent the following:
[0026] 10, refrigeration system;
[0027] 1, refrigeration assembly; 11, compressor; 110, housing; 110a, upper housing; 110b, lower housing; 111, suction pipe; 112, discharge pipe; 113, process pipe; 114, muffling chamber; 115, inner chamber; 116, muffler; 117, cylinder; 118, suction port;
[0028] 12, condenser; 13, evaporator; 14, throttling element; 15, filter;
[0029] 2, reversing valve; 21, first valve port; 22, second valve port; 23, third valve port; 24, fourth valve port;
[0030] 3, refrigeration cycle circuit;
[0031] 4, energy storage device;
[0032] 5, switching valve; 50, inlet; 51, first outlet; 52, second outlet;
[0033] 6, heater. DETAILED DESCRIPTION
[0034] Example embodiments of the present application will now be described in detail with reference to the accompanying drawings. Although example embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
[0035] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.
[0036] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms when used in the singular or plural herein do not imply a sequence or order unless the context clearly indicates otherwise. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
[0037] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0038] Figure 1 Structure schematic diagram of the refrigeration system of an embodiment of the present application.
[0039] Referring to Figure 1 An embodiment of the present application provides a refrigeration system 10, comprising a refrigeration assembly 1, a reversing valve 2, a refrigeration cycle circuit 3 and an energy storage device 4.
[0040] The refrigeration assembly 1 comprises a compressor 11, a condenser 12, a throttling element 14 and an evaporator 13 arranged in sequence along the refrigeration cycle circuit 3. The throttling element 14 can be, for example but not limited to, a capillary tube, and is configured to impede, throttle and depress the high-temperature and high-pressure liquid refrigerant flowing therethrough to become low-temperature and low-pressure liquid, so as to improve the heat exchange efficiency of the condenser 12 in the defrosting cycle mode or improve the heat exchange efficiency of the evaporator 13 in the refrigeration cycle mode.
[0041] The reversing valve 2 is connected to the compressor 11, the condenser 12 and the evaporator 13 through pipelines, and is configured to adjust the flow direction of the refrigerant in the refrigeration cycle circuit 3, so as to switch the refrigeration system 10 between the refrigeration cycle mode and the defrosting cycle mode.
[0042] The energy storage device 4 is arranged on one side of the condenser 12, and is used for heat exchange with the condenser 12 to store cold or heat.
[0043] In this embodiment, the reversing valve 2 includes a first valve port 21, a second valve port 22, a third valve port 23 and a fourth valve port 24. The first valve port 21 is in communication with the exhaust end of the compressor 11, the second valve port 22 is in communication with the suction end of the compressor 11, the third valve port 23 is in communication with the inlet of the condenser 12, and the fourth valve port 24 is in communication with the outlet of the evaporator 13. The reversing valve 2 has two working states. In the first state, the reversing valve 2 is powered off, the first valve port 21 can be in communication with the third valve port 23, and the second valve port 22 can be in communication with the fourth valve port 24, so that the refrigeration system 10 normally operates in the refrigeration cycle mode. At this time, the refrigerant flows through the reversing valve 2 in the first direction, so that the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust end of the compressor 11 sequentially passes through the condenser 12, the throttling element 14 and the evaporator 13, and then returns to the suction end of the compressor 11. In the second state, the reversing valve 2 is powered on, the first valve port 21 can be in communication with the fourth valve port 24, and the second valve port 22 can be in communication with the third valve port 23, so that the refrigeration system 10 enters the defrosting cycle mode. At this time, the refrigerant flows through the reversing valve 2 in the second direction opposite to the first direction, so that the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust end of the compressor 11 sequentially passes through the evaporator 13, the throttling element 14 and the condenser 12, and then returns to the suction end of the compressor 11. The high-temperature and high-pressure refrigerant releases heat in the evaporator 13, and the heat is exchanged with the frost layer on the surface of the evaporator 13 through the partition wall of the evaporator 13, so as to achieve the purpose of defrosting. Subsequently, the low-temperature refrigerant is throttled and cooled by the throttling element 14, and finally returns to the compressor 11 through the condenser 12. Since the temperature of the high-temperature refrigerant is greatly reduced after flowing through the evaporator 13, and the temperature of the refrigerant flowing into the condenser 12 is further reduced after being throttled and cooled by the throttling element 14, the temperature of the refrigerant flowing into the condenser 12 is too low, and the condenser 12 has the risk of condensation or frosting, which reduces the system operation efficiency.
[0044] Therefore, the refrigeration system 10 provided in this embodiment is arranged with the energy storage device 4 adjacent to the condenser 12, and the energy storage device 4 is used for heat exchange with the condenser 12 to store cold or heat. In the refrigeration cycle mode, the energy storage device 4 can absorb and store the heat released by the condenser 12, and utilize the cold stored in the defrosting cycle mode to reduce the temperature of the condenser 12. In the defrosting cycle mode, the energy storage device 4 can store the cold of the condenser 12, and utilize the heat stored in the refrigeration cycle mode to increase the temperature of the condenser 12, so as to reduce the risk of condensation and frosting of the condenser 12, and reduce the possibility of liquid strike of the compressor 11 caused by incomplete evaporation of the refrigerant. Finally, the energy is fully utilized during refrigeration and defrosting, and the overall energy consumption of the system operation is reduced.
[0045] In some embodiments, the energy storage device 4 comprises an outer cover and a phase change material arranged in the outer cover, the phase change material being used to store heat or cold.
[0046] The phase change material (PCM) of the energy storage device 4 has the ability to change its physical state within a certain temperature range. Taking the solid-liquid phase change as an example, when heated to the melting temperature, a phase change from solid to liquid occurs, and during the melting process, the phase change material absorbs and stores a large amount of latent heat; when the phase change material cools down, the stored heat is released to the environment within a certain temperature range, and the reverse phase change from liquid to solid occurs. In these two phase change processes, the energy stored or released is called phase change latent heat. When the physical state changes, the temperature of the material itself remains almost unchanged before the phase change is completed, forming a wide temperature platform. Although the temperature is constant, the latent heat absorbed or released is quite large.
[0047] The phase change material can include inorganic PCM, organic PCM, and composite PCM. Among them, inorganic PCM mainly includes crystalline hydrated salt, molten salt, metal or alloy, etc.; organic PCM mainly includes paraffin, acetic acid and other organic substances; composite PCM can effectively overcome the shortcomings of single inorganic PCM or organic PCM, and can improve the application effect of phase change material and expand its application range.
[0048] In some embodiments, the refrigeration assembly 1 further comprises a sensor assembly and a fan, the sensor assembly being used to monitor the temperature of the condenser 12 and the temperature of the energy storage device 4, and the fan being arranged to adjust the size of the rotating speed according to the temperature of the condenser 12 and the temperature of the energy storage device 4.
[0049] The sensor assembly can include a first sensor and a second sensor, the first sensor being used to monitor the temperature of the condenser 12, and the second sensor being used to monitor the temperature of the energy storage device 4. In the refrigeration cycle mode, when the temperature of the energy storage device 4 is lower than the temperature of the condenser 12, the fan runs at a low rotating speed to save the power consumption of the fan; when the temperature of the energy storage device 4 is higher than or equal to the temperature of the condenser 12, the fan runs at a higher rotating speed. Similarly, in the defrosting cycle mode, when the temperature of the energy storage device 4 is higher than or equal to the temperature of the condenser 12, the fan runs at a low rotating speed; when the temperature of the energy storage device 4 is lower than the temperature of the condenser 12, the fan runs at a higher rotating speed.
[0050] Figure 2 A structure schematic diagram of a refrigeration system of another embodiment of the present application is shown in FIG. 4, Figure 3 A structure schematic diagram of a refrigeration system of another embodiment of the present application is shown in FIG. 4, Figure 2 A structure schematic diagram of a compressor in the refrigeration system shown in FIG. 4 is shown in FIG. 5.
[0051] In some embodiments, the compressor 11 comprises a shell 110 having an inner cavity 115, and a muffler 116, a cylinder 117 and a high-pressure chamber 114 disposed in the inner cavity 115 and in communication with each other, the shell 110 is provided with a plurality of return gas pipes 111, exhaust pipes 112 and process pipes 113 distributed at intervals, the return gas pipes 111 are in communication with the cavity of the muffler 116, the exhaust pipes 112 are in communication with the high-pressure chamber 114, and the process pipes 113 are in communication with the inner cavity 115; the refrigeration system 10 further comprises a switching valve 5 configured to selectively connect the reversing valve 2 and the process pipes 113, so that the refrigerant discharged from the exhaust pipes 112 of the compressor 11 defrosts the evaporator 13, and the defrosted refrigerant flows through the condenser 12 and the process pipes 113 into the inner cavity 115 of the compressor 11, and preheats the refrigerant.
[0052] As shown in Figure 2 and Figure 3 , in this embodiment, the compressor 11 is the heart of the refrigeration system 10, and its main function is to compress the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant. The compressor 11 can be a piston compressor, which comprises a muffler 116, a cylinder 117 and a high-pressure chamber 114 disposed in the inner cavity 115 of the shell 110, the muffler 116 is used to reduce the aerodynamic noise generated by the gas entering the compressor 11, the cylinder 117 is provided with a piston, a suction valve, an exhaust valve, a crankshaft component and the like, and the mechanical work of the piston is converted into heat energy to compress the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant into the high-pressure chamber 114, and the high-pressure chamber 114 is used to reduce the aerodynamic noise generated by the compressed gas. In the refrigeration cycle mode, the exhaust pipe 112 of the compressor 11 is used to discharge the high-temperature and high-pressure gaseous refrigerant after compression from the compressor 11; the return gas pipe 111 is used to return the refrigerant after the evaporator 13 to the compressor 11; the process pipe 113 is generally used for debugging and maintenance of the refrigeration system 10, such as filling refrigerant, vacuumizing or detecting system pressure in the inner cavity 115. In the defrosting cycle mode, the functions of the process pipe 113 and the return gas pipe 111 can be adjusted, i.e. the low-temperature refrigerant after the evaporator 13 returns to the inner cavity 115 of the compressor 11 through the process pipe 113, and the return gas pipe 111 is used for debugging and maintenance of the refrigeration system 10, such as filling refrigerant, vacuumizing or detecting system pressure in the inner cavity 115, etc.
[0053] Specifically, the return gas line of the refrigeration cycle loop 3 is connected to the process pipe 113 of the compressor 11. When the refrigeration system 10 enters the defrost cycle mode, the switching valve 5 is configured to open the reversing valve 2 and the process pipe 113 so that the refrigerant discharged from the exhaust pipe 112 of the compressor 11 defrosts the evaporator 13. The defrosted refrigerant flows through the condenser 12 and the process pipe 113 into the inner cavity 115 of the compressor 11. Since the compressor 11 converts mechanical energy into heat energy by doing work during the process of compressing the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, the inner cavity 115 of the compressor 11 has a high heat. The waste heat of the inner cavity 115 of the compressor 11 can be used to preheat the refrigerant. The refrigerant after being heated enters the silencing chamber 114, which helps to maintain a uniform temperature distribution inside the compressor 11 and reduces the risk of local overheating. During the process of preheating the refrigerant, the liquid refrigerant can also be completely evaporated into gaseous refrigerant, further reducing the possibility of liquid slugging in the compressor 11 and improving the service life of the compressor 11.
[0054] In some embodiments, the switching valve 5 includes an inlet 50, a first outlet 51 and a second outlet 52. The inlet 50 is connected to the reversing valve 2, the first outlet 51 is connected to the return gas pipe 111, and the second outlet 52 is connected to the process pipe 113.
[0055] like Figure 2 As shown, in the defrost cycle mode, the switching valve 5 opens the inlet 50 and the second outlet 52, and closes the first outlet 51, so that the reversing valve 2 and the process pipe 113 are connected. The refrigerant discharged from the exhaust pipe 112 of the compressor 11 defrosts the evaporator 13. The defrosted refrigerant flows through the condenser 12 and the process pipe 113 into the inner cavity 115 of the compressor 11.
[0056] In some embodiments, the switching valve 5 includes a first valve body and a second valve body, the first valve body being disposed on the pipeline where the return gas pipe 111 is located, and the second valve body being disposed on the pipeline where the process pipe 113 is located.
[0057] In one example, both the first valve body and the second valve body are solenoid valves with one inlet and one outlet, so as to selectively open the return gas pipe 111 or the process pipe 113. Specifically, when the refrigeration system 10 enters the refrigeration cycle mode, the first valve body opens the pipe where the return gas pipe 111 is located, while the second valve body 2b closes the pipe where the process pipe 113 is located; when the refrigeration system 10 enters the defrost cycle mode, the first valve body closes the pipe where the return gas pipe 111 is located, while the second valve body opens the pipe where the process pipe 113 is located.
[0058] In some embodiments, the housing 110 includes a lower housing 110b and an upper housing 110a covering the lower housing 110b. A return pipe 111, an exhaust pipe 112, and a process pipe 113 are respectively disposed in the lower housing 110b, and the return pipe 111 and the exhaust pipe 112 are disposed adjacent to each other.
[0059] As shown in Figure 3 , the return gas pipe 111, the exhaust pipe 112 and the process pipe 113 are arranged on the lower shell 110b, facilitating assembly and disassembly of the compressor 11. The return gas pipe 111 is generally used to connect the evaporator 13, and the exhaust pipe 112 is generally used to connect the condenser 12. The return gas pipe 111 and the exhaust pipe 112 are arranged adjacent to each other on the lower shell 110b, so that the pipes can be arranged on the same side, reducing the occupied space of the pipes. Alternatively, the return gas pipe 111, the exhaust pipe 112 and the process pipe 113 can all be copper pipes, which have good heat conductivity and are corrosion resistant.
[0060] Figure 4 As shown in Figure 3 , the structure diagram of the compressor omitting the upper shell.
[0061] In some embodiments, the silencer 116 is provided with an air inlet 118, and the high-pressure chamber 114 is provided with an exhaust port. One end of the return gas pipe 111 extending into the inner cavity 115 is arranged opposite to and spaced apart from the air inlet 118. One end of the exhaust pipe 112 extending into the inner cavity 115 is connected to the exhaust port through a pipe. One end of the process pipe 113 extending into the inner cavity 115 is spaced apart from the air inlet 118 by a preset distance.
[0062] As shown in Figure 4 , in the defrosting cycle mode, since one end of the process pipe 113 extending into the inner cavity 115 is spaced apart from the air inlet 118 by a preset distance, the refrigerant entering the inner cavity 115 of the compressor 11 from the process pipe 113 flows in two streams in the inner cavity 115. After heat exchange between the refrigerant and the residual heat of the inner cavity 115, the two streams converge at the air inlet 118 and enter the chamber of the silencer 116, and then enter the cylinder 117 through the suction valve plate and are compressed by the piston. The compressed gas refrigerant enters the high-pressure chamber 114 through the exhaust valve plate, and then is discharged from the exhaust pipe 112 through the exhaust port, and the next defrosting cycle is performed.
[0063] In some embodiments, the refrigeration system 10 further comprises a heater 6 arranged on the pipe on which the process pipe 113 is arranged.
[0064] As shown in Figure 2As shown, when the temperature of the refrigerant in the process tube 113 is low, condensation and frost may form on the inner surface of the compressor casing 110, causing liquid refrigerant to mix into the gaseous refrigerant, which may lead to liquid slugging in the compressor 11. Therefore, in this embodiment, a heater 6 is installed on the pipeline containing the process tube 113. The heater 6 is used to assist in heating the refrigerant in the process tube 113, and the sensor assembly can also be used to detect the temperature of the refrigerant flowing into the process tube 113. If the refrigerant temperature is lower than a temperature threshold (e.g., -10°C), the controller activates the heater 6, providing additional heat to ensure that the temperature of the refrigerant does not drop too low before returning to the inner cavity 115 of the compressor 11. This prevents condensation and frost formation on the surface of the compressor 11, thus helping to maintain the gaseous state of the refrigerant, preventing liquid slugging caused by gaseous refrigerant liquefaction, and ensuring the safe and stable operation of the compressor 11.
[0065] In some embodiments, in the refrigeration cycle mode, the switching valve 5 is further configured to open the inlet 50 and the first outlet 51 so that the refrigerant discharged from the exhaust pipe 112 of the compressor 11 flows sequentially through the condenser 12, the throttling element 14 and the evaporator 13, and returns to the return pipe 111 of the compressor 11.
[0066] like Figure 2 As shown, when the reversing valve 2 is de-energized, the refrigeration system 10 operates normally and enters the refrigeration cycle mode. In the refrigeration cycle mode, the controller can control the switching valve 5 to open the inlet 50 and the first outlet 51. The high-temperature refrigerant discharged from the exhaust pipe 112 of the compressor 11 flows sequentially through the condenser 12, the throttling element 14 and the evaporator 13, and then flows back to the return pipe 111 of the compressor 11. The return pipe 111 is opposite to and spaced apart from the intake port 118 of the muffler, which can directly draw the return refrigerant into the muffler 116 and into the muffler chamber 114, and then into the cylinder 117 where it is compressed by the piston. The compressed gaseous refrigerant enters the muffler chamber 114, which is connected to the exhaust pipe 112. The compressed refrigerant is discharged from the exhaust pipe 112 to start the next refrigeration cycle.
[0067] In some embodiments, the refrigeration assembly 1 further includes a filter 15, which is disposed in the refrigeration cycle loop 3 and located between the condenser 12 and the throttling element 14. Optionally, the filter 15 is a dryer filter, which can filter impurities in the refrigerant before it enters the throttling element 14, and dry the low-temperature, low-pressure refrigerant after it flows through the condenser 12, thereby improving the evaporation efficiency of the evaporator 13.
[0068] In addition, this application proposes a refrigeration device, including the refrigeration system 10 of various embodiments of this application. The refrigeration device can be, for example, but not limited to, a refrigerator, freezer, cold storage, etc., and can be placed in a large space or embedded in a small, narrow space.
[0069] The above description is only preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A refrigeration system characterized by, The application relates to a refrigeration system. The refrigeration system comprises a refrigeration assembly, a reversing valve, and an energy storage device. The refrigeration assembly comprises a compressor, a condenser, a throttling element, and an evaporator arranged in sequence along a refrigeration cycle loop. The reversing valve is connected to the compressor, the condenser, and the evaporator through pipelines. The reversing valve is configured to adjust the flow direction of refrigerant in the refrigeration cycle loop, so that the refrigeration system switches between a refrigeration cycle mode and a defrosting cycle mode.
2. The refrigeration system of claim 1, wherein, The energy storage device is arranged on one side of the condenser and is used for heat exchange with the condenser to store cold or heat.
3. The refrigeration system of claim 1, wherein, The energy storage device comprises an outer cover and a phase change material arranged in the outer cover.
4. The refrigeration system of any of claims 1 to 3, wherein, The phase change material is used for storing heat or cold. The refrigeration assembly further comprises a sensor assembly and a fan.
5. The refrigeration system of claim 4, wherein, The sensor assembly is used for monitoring the temperature of the condenser and the temperature of the energy storage device.
6. The refrigeration system of claim 4, wherein, The fan is arranged to adjust the rotating speed according to the temperature of the condenser and the temperature of the energy storage device.
7. The refrigeration system of claim 4 wherein, The compressor comprises a shell with an inner cavity, a silencer, a cylinder, and a high-pressure cabin chamber arranged in the inner cavity and in communication with each other.
8. The refrigeration system of claim 7, wherein, The shell is provided with a plurality of return gas pipes, exhaust pipes, and process pipes which are arranged at intervals.
9. The refrigeration system of claim 4 wherein, The return gas pipes are in communication with the chamber of the silencer.
10. A refrigeration appliance characterized in that, The exhaust pipes are in communication with the high-pressure cabin chamber. The process pipes are in communication with the inner cavity. The refrigeration system further comprises a switching valve. The switching valve is configured to selectively guide the reversing valve and the process pipes. The refrigerant discharged from the exhaust pipe of the compressor defrosts the evaporator. The defrosted refrigerant flows through the condenser and the process pipe into the inner cavity of the compressor and preheats the refrigerant. The switching valve comprises an inlet, a first outlet, and a second outlet. The inlet is connected to the reversing valve. The first outlet is connected to the return gas pipe. The second outlet is connected to the process pipe. The switching valve comprises a first valve body and a second valve body. The first valve body is arranged on the pipeline where the return gas pipe is located. The second valve body is arranged on the pipeline where the process pipe is located. The silencer is provided with an air inlet. The high-pressure cabin chamber is provided with an exhaust port. One end of the return gas pipe extending into the inner cavity is arranged in a spaced manner opposite to the air inlet. One end of the exhaust pipe extending into the inner cavity is connected to the exhaust port through a pipeline. One end of the process pipe extending into the inner cavity is spaced from the air inlet by a preset distance. The shell comprises a lower shell body and an upper shell body covering the lower shell body. The return gas pipe, the exhaust pipe, and the process pipe are arranged on the lower shell body. The return gas pipe and the exhaust pipe are arranged adjacent to each other. The refrigeration system further comprises a heater arranged on the pipeline where the process pipe is located. The refrigeration system comprises the refrigeration system according to any one of claims 1-9.