Refrigerating system and refrigerating equipment
By introducing reversing valves and switching valves into the refrigerant system, the reverse operation of the refrigerant flow path is achieved, and combined with the switching of defrost cycles and refrigeration cycles, the problem of increased energy consumption after frost is solved, and efficient defrost and energy-saving refrigeration are achieved.
Patent Information
- Application Number
- CN202422382491.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The heat exchange effect of the evaporator becomes worse after frosting, resulting in an increase in energy consumption and the common electric heating defrost increases energy consumption.
The combination of reversing valves and switching valves is adopted to achieve reverse operation of the refrigerant flow path, combining the switching of defrost circulation, rapid refrigeration cycle and energy-saving refrigeration cycle, and high-temperature and high-pressure gas refrigerant for heat pump exhaust defrost.
While achieving exhaust gas defrost, it reduces system operation power consumption, improves refrigeration efficiency, and reduces energy consumption.
Smart Images
Figure CN223121741U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of refrigeration, and more specifically, to a refrigeration system and a refrigeration device. Background Art
[0002] As a refrigeration device, the main function of a refrigeration device is to store and preserve food. During the refrigeration process of the refrigeration device, multiple factors such as the humidity at the user's location, the frequency of opening and closing the door, and the water content of the stored items will cause frosting at the bottom of the evaporator due to being below zero. After frosting, the heat exchange effect of the evaporator will deteriorate significantly, resulting in an energy consumption deterioration phenomenon in the refrigeration of the refrigeration device.
[0003] Currently, the commonly used defrosting methods are natural defrosting and electric heating defrosting. In particular, electric heating defrosting is commonly used in the second compartment. Although the defrosting efficiency is high, defrosting will significantly increase energy consumption. Summary of the Utility Model
[0004] The purpose of this application is to provide a refrigeration system and a refrigeration device, which can reduce the system operation power consumption while realizing exhaust defrosting.
[0005] In a first aspect, this application proposes a refrigeration system, including: a refrigeration component, including a compressor, a condenser, a first evaporator, and a second evaporator; a refrigeration cycle circuit, including a main pipeline and a first refrigerant branch and a second refrigerant branch connected to the main pipeline. The first refrigerant branch and the second refrigerant branch are arranged in parallel. The compressor and the condenser are sequentially arranged on the main pipeline. The first evaporator and the second evaporator are arranged in series or in parallel in the refrigeration cycle circuit; and a reversing valve, including a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is connected to the outlet of the compressor, the second valve port is connected to the inlet of the condenser, the third valve port is connected to the inlet of the compressor, and the fourth valve port is connected to the outlet of the first evaporator and / or the outlet of the second evaporator; a switching valve, the main pipeline is connected to the first refrigerant branch and the second refrigerant branch through the switching valve. The switching valve includes an inlet, a first outlet, and a second outlet. The inlet is connected to the outlet of the condenser, the first outlet is connected to the first refrigerant branch, and the second outlet is connected to the second refrigerant branch. Both the first outlet and the second outlet have a fully open state, a throttling state, and a closed state; wherein, when the first valve port is connected to the fourth valve port, the second valve port is connected to the third valve port, and at the same time the first outlet and / or the second outlet is in the fully open state, the first evaporator and / or the first evaporator performs a defrosting cycle; when the first valve port is connected to the second valve port, the third valve port is connected to the fourth valve port, and at the same time the first outlet is in the fully open state and / or the second outlet is in the fully open state, the refrigeration system performs a rapid refrigeration cycle; when the first valve port is connected to the second valve port, the third valve port is connected to the fourth valve port, and at the same time the first outlet is in the throttling state and / or the second outlet is in the throttling state, the refrigeration system performs an energy-saving refrigeration cycle.
[0006] In a second aspect, the present application provides a refrigeration device, including: a box body, in which a first compartment and a second compartment are provided; a refrigeration system as in the embodiments of the present application, with a first evaporator of the refrigeration system disposed in the first compartment and a second evaporator of the refrigeration system disposed in the second compartment; a sensor assembly for detecting the environmental information of the first compartment and the environmental information of the second compartment; and a controller electrically connected to the sensor assembly, the compressor, the reversing valve and the switching valve of the refrigeration system respectively. The controller is configured to control the reversing valve and the switching valve to operate according to the environmental information of the first compartment and the environmental information of the second compartment, so that the refrigeration system executes any one of a defrosting cycle, a rapid refrigeration cycle and an energy-saving refrigeration cycle.
[0007] The refrigeration system and the refrigeration device provided by the embodiments of the present application set a reversing valve in the refrigeration cycle circuit to realize the reverse operation of the refrigerant flow path to achieve heat pump exhaust defrosting. At the same time, a switching valve with a throttling function is also set in the refrigeration cycle circuit, which can realize the switching between rapid refrigeration and energy-saving refrigeration, and effectively reduce the refrigeration power consumption of the system while realizing exhaust defrosting.
[0008] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are hereinafter specifically exemplified. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:
[0010] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:
[0011] Figure 1 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application;
[0012] Figure 2 is Figure 1 a schematic exploded view of the reversing valve in the refrigeration system shown;
[0013] Figure 3 is Figure 1 a schematic exploded view of the switching valve in the refrigeration system shown;
[0014] Figure 4 Schematic structural diagram of a refrigeration system according to another embodiment of the present application;
[0015] Figure 5 Schematic structural diagram of a refrigeration device according to an embodiment of the present application.
[0016] The reference numerals in the drawings are represented as follows:
[0017] 10, refrigeration system; 1, refrigeration component; 11, compressor; 12, condenser; 13, first evaporator; 14, second evaporator; 15, first throttling element; 16, second throttling element;
[0018] 2, switching valve; 20, inlet; 21, first outlet; 211, first through hole; 212, first arc-shaped groove; 22, second outlet; 221, second through hole; 222, second arc-shaped groove; 23, valve seat; 24, valve block; 240, connecting portion; 241, first notch; 242, second notch;
[0019] 3, refrigeration cycle circuit; 30, main pipeline; 31, first refrigerant branch; 32, second refrigerant branch;
[0020] 4, reversing valve; 41, first valve port; 42, second valve port; 43, third valve port; 44, fourth valve port; 45, first valve body; 46, second valve body; 460, rotating portion; 461, first notch; 462, second notch;
[0021] 61, first check valve; 62, second check valve; 63, third check valve; 64, fourth check valve; 65, fifth check valve; 7, filtering device;
[0022] 100, refrigeration device; 101, first compartment; 102, second compartment. Detailed implementation manners
[0023] The exemplary embodiments of the present application will be described in more detail below with reference to the drawings. Although the exemplary 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. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be completely conveyed to those skilled in the art.
[0024] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the 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 combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless explicitly stated as an order of performance. It should also be understood that additional or alternative steps may be used.
[0025] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly dictates otherwise, terms such as "first" and "second" and other numerical terms when used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be termed a second element, component, region, layer, or section without departing from the teachings of the example embodiments.
[0026] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include 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 flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both an orientation above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.
[0027] Figure 1 It is a schematic structural diagram of a refrigeration system according to an embodiment of the present application.
[0028] Refer to Figure 1, the refrigeration system 10 provided by the embodiments of the present application includes a refrigeration component 1, a switching valve 2, a refrigeration cycle circuit 3, and a reversing valve. The refrigeration system 10 can be applied to refrigeration equipment, or to refrigeration equipment such as refrigerators, cold storages, etc. For the convenience of description, the embodiments of the present application will be described by taking the refrigeration system 10 applied to a refrigerator as an example.
[0029] The refrigeration component 1 includes a compressor 11, a condenser 12, a first evaporator 13, and a second evaporator 14.
[0030] The refrigeration cycle circuit 3 includes a main pipeline 30 and a first refrigerant branch 31 and a second refrigerant branch 32 communicated with the main pipeline 30. The first refrigerant branch 31 and the second refrigerant branch 32 are arranged in parallel. The compressor 11 and the condenser 12 are sequentially arranged on the main pipeline 30. The first evaporator 13 and the second evaporator 14 are arranged in series or in parallel in the refrigeration cycle circuit 3.
[0031] The reversing valve 4 includes a first valve port 41, a second valve port 42, a third valve port 43, and a fourth valve port 44. The first valve port 41 is communicated with the outlet of the compressor 11. The second valve port 42 is communicated with the inlet of the condenser 12. The third valve port 43 is communicated with the inlet of the compressor 11. The fourth valve port 44 is communicated with the outlet of the first evaporator 13 and / or the outlet of the second evaporator 14.
[0032] The main pipeline 30 is communicated with the first refrigerant branch 31 and the second refrigerant branch 32 through the switching valve 2. Among them, the switching valve 2 includes an inlet 20, a first outlet 21, and a second outlet 22. The inlet 20 is communicated with the outlet of the condenser 12. The first outlet 21 is communicated with the first refrigerant branch 31. The second outlet 22 is communicated with the second refrigerant branch 32. Both the first outlet 21 and the second outlet 22 have a fully open state, a throttling state, and a closed state.
[0033] Among them, when the first valve port 41 is communicated with the fourth valve port 44, the second valve port 42 is communicated with the third valve port 43, and at the same time the first outlet 21 and / or the second outlet 22 is in the fully open state, the first evaporator 13 and / or the second evaporator 14 performs a defrosting cycle; when the first valve port 41 is communicated with the second valve port 42, the third valve port 43 is communicated with the fourth valve port 44, and at the same time the first outlet 21 is in the fully open state and / or the second outlet 22 is in the fully open state, the refrigeration system 10 performs a rapid refrigeration cycle; when the first valve port 41 is communicated with the second valve port 42, the third valve port 43 is communicated with the fourth valve port 44, and at the same time the first outlet 21 is in the throttling state and / or the second outlet 22 is in the throttling state, the refrigeration system 10 performs an energy-saving refrigeration cycle.
[0034] In the embodiments of the present application, the refrigerator can be a dual-system refrigerator or a multi-system refrigerator. Among them, a dual-system refrigerator generally includes a first compartment and a second compartment. Optionally, the first compartment is a refrigerating compartment, and the second compartment is a freezing compartment. The first evaporator 13 is used to refrigerate the first compartment, and the second evaporator 14 is used to refrigerate the second compartment. The first evaporator 13 and the second evaporator 14 can be arranged in series or in parallel. Taking Figure 1 the example that the first evaporator 13 and the second evaporator 14 are arranged in parallel in the refrigeration cycle circuit 3, the first evaporator 13 is arranged in the first refrigerant branch 31, the second evaporator 14 is arranged in the second refrigerant branch 32, and the fourth valve port 44 is communicated with the outlets of both the first evaporator 13 and the second evaporator 14. A reversing valve 4 with two inlets and two outlets and a switching valve 2 with one inlet and two outlets are arranged in the refrigeration system 10. Among them, the reversing valve 4 realizes the switching between the refrigeration mode and the defrosting mode by adjusting the flow direction of the refrigerant. The switching valve 2 is a large-flow passage in the fully open state, mainly used in the case of rapid refrigeration or just exiting the defrosting, and is a small-flow passage in the throttling state, mainly used in the conventional energy-saving mode. The switching valve 2 has a function of breaking the circuit and maintaining pressure. The refrigerant can form two circulation circuits with opposite directions through the reversing valve 4 and the switching valve 2.
[0035] The first circulation circuit is: the first valve port 41 of the reversing valve 4 is communicated with the second valve port 42, the third valve port 43 is communicated with the fourth valve port 44, and at the same time, the first outlet 21 and / or the second outlet 22 of the switching valve 2 are opened. The refrigeration system 10 operates normally to execute the refrigeration cycle. At this time, the refrigerant flows along the first direction through the reversing valve 4, so that the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 11 becomes partially liquid refrigerant after being condensed and dissipated heat by the condenser 12. Then, the mixed refrigerant of the high-temperature liquid refrigerant and the gaseous refrigerant flows through the switching valve 2 and then absorbs heat by evaporation through the first evaporator 13 and / or the second evaporator 14, taking away the heat of each compartment and becoming a low-temperature and low-pressure gas, and then flowing back to the compressor 11 through the reversing valve 4 to realize a primary refrigeration cycle for each compartment. Among them, when the first outlet 21 is in the fully open state and / or the second outlet 22 is in the fully open state, the refrigeration system 10 executes a rapid refrigeration cycle. When the first outlet 21 is in the throttling state and / or the second outlet 22 is in the throttling state, the refrigeration system 10 executes an energy-saving refrigeration cycle.
[0036] The second loop is as follows: the first valve port 41 is communicated with the fourth valve port 44, and the second valve port 42 is communicated with the third valve port 43. Meanwhile, the first outlet 21 and / or the second outlet 22 are in a fully open state, and the refrigeration system 10 executes a defrosting cycle. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 11 flows along the second direction through the reversing valve 4, and the second direction is opposite to the first direction, so that the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 11 directly flows to the first evaporator 13 and / or the second evaporator 14. The heat of the high-temperature and high-pressure gaseous refrigerant is used to defrost the first evaporator 13 and / or the second evaporator 14. After condensing and dissipating heat through the first evaporator 13 and / or the second evaporator 14, it becomes a liquid refrigerant. The liquid refrigerant passes through the switching valve 2 and the condenser 12 to evaporate and absorb heat to become a low-temperature and low-pressure gas, and returns to the inlet of the compressor 11, thereby realizing heat pump exhaust defrosting. When the first compartment is a refrigerating compartment, the first evaporator 13 of the refrigerating compartment generally does not defrost alone. However, for a large-capacity refrigerator, the refrigerating compartment also needs to defrost alone.
[0037] During the operation of the refrigeration system 10 when executing the defrosting cycle, the controller of the refrigerator will record the refrigeration duration t1 of the refrigerator and the number of defrosting requests of the first compartment and the second compartment. Taking the first compartment as an example, when the first compartment requests defrosting three times continuously, the refrigerator needs to defrost the first evaporator 13. Considering that the temperature of the first compartment is generally above 0°C and the load required for defrosting is small, the first valve port 41 of the reversing valve 4 is communicated with the fourth valve port 44, and the second valve port 42 is communicated with the third valve port 43. Meanwhile, the first outlet 21 of the switching valve 2 is in a fully open state, and the compressor 11 operates at the rotation speed of the compressor 11 during the previous refrigeration. The defrosting condition of the first evaporator 13 is judged according to the first sensor on the first evaporator 13. When it continuously remains higher than the defrosting exit temperature for one minute, the defrosting of the first compartment ends. When the refrigeration cycle time of the second compartment reaches the defrosting time requirement, the second compartment requests defrosting. The second outlet 22 of the switching valve 2 is in a fully open state, and the compressor 11 operates at the rotation speed of the previous refrigeration compressor. Then it passes through the condenser 12 and finally returns to the inlet of the compressor 11 through the second valve port 42 and the third valve port 43 of the reversing valve 4. The heat pump exhaust defrosting is realized through the reverse loop flow of the refrigerant. When it continuously remains higher than the defrosting exit temperature for 1 minute, the defrosting of the second compartment ends.
[0038] The refrigeration system provided by the embodiment of the present application sets a reversing valve 4 in the refrigeration cycle loop 3 to realize the reverse operation of the refrigerant flow path to realize heat pump exhaust defrosting. At the same time, a switching valve 2 with a throttling function is also set in the refrigeration cycle loop, which can realize the switching between rapid refrigeration and energy-saving refrigeration, and effectively reduce the refrigeration power consumption of the system while realizing exhaust defrosting.
[0039] Figure 2 For Figure 1 the exploded structural schematic diagram of the reversing valve in the refrigeration system shown.
[0040] In some embodiments, the reversing valve 4 includes a first valve body 45 and a second valve body 46 arranged coaxially. The end face of the first valve body 45 is provided with a first valve port 41, a second valve port 42, a third valve port 43, and a fourth valve port 44 that are circumferentially spaced apart. The first valve port 41 and the second valve port 42 are opened on a circumference centered on the central axis of the first valve body 45 and having a first length as the radius. The third valve port 43 and the fourth valve port 44 are opened on a circumference centered on the central axis of the first valve body 45 and having a second length as the radius, and the first length is greater than the second length.
[0041] The second valve body 46 includes a rotating portion 460 and a first notch 461 and a second notch 462 provided on the rotating portion 460. The rotating portion 460 is in contact with the end face of the first valve body 45 and can rotate relative to the first valve body 45 so that the first notch 461 can selectively communicate with any one of the first valve port 41 and the second valve port 42, and the second notch 462 can selectively communicate with any one of the third valve port 43 and the fourth valve port 44.
[0042] Refer to Figure 2 , the end face of the first valve body 45 is a flat mating surface, and the second valve body 46 can be in contact with the end face of the first valve body 45 and perform a rotational movement at a certain angle. The end face of the first valve body 45 is provided with a first valve port 41, a second valve port 42, a third valve port 43, and a fourth valve port 44 that are circumferentially spaced apart, and are opened on circumferences centered on the central axis of the first valve body 45 and having different lengths as the radii, and are separated by a certain distance. The reversing valve 4 further includes two inlet pipes and two outlet pipes fixedly connected to the first valve body 45. The two inlet pipes are respectively communicated with the first valve port 41 and the second valve port 42, and the two outlet pipes are respectively communicated with the third valve port 43 and the fourth valve port 44. The inlet pipes and the outlet pipes are respectively communicated with the refrigeration cycle circuit 3 to meet the requirements of the refrigeration system 10. In addition, the angles of the first valve port 41, the second valve port 42, the third valve port 43, and the fourth valve port 44 in the circumferential direction can be adjusted according to the use requirements to meet various different refrigeration requirements.
[0043] The reversing valve 4 may further include a control unit and a motor (not shown in the figure). The control unit controls the rotor of the motor to drive the second valve body 46 to rotate relative to the first valve body 45. The rotating part 460 of the second valve body 46 is used for rotational cooperation with the end face of the first valve body 45. When the first notch 461 of the rotating part 460 rotates to correspond to the first valve port 41, the first valve port 41 is in a conducting state. When the first notch 461 of the rotating part 460 rotates to correspond to the second valve port 42, the second valve port 42 is in a conducting state. When the first valve port 41 is in a conducting state, if the second notch 462 corresponds to any one of the third valve port 43 and the fourth valve port 44, the corresponding flow channel can be conducted. For example, the first valve port 41 is conducted with any one of the third valve port 43 and the fourth valve port 44. When the second valve port 42 is in a conducting state, the second valve port 42 can be conducted with any one of the third valve port 43 and the fourth valve port 44. When the remaining parts of the rotating part 460 other than the first notch 461 and the second notch 462 cover the third valve port 43 and the fourth valve port 44, the third valve port 43 and the fourth valve port 44 are respectively in a closed state.
[0044] Figure 3 For Figure 1 the exploded structural schematic diagram of the switching valve in the shown refrigeration system.
[0045] In some embodiments, the switching valve 2 includes a valve seat 23 and a valve block 24 arranged coaxially. The end face of the valve seat 23 is provided with an inlet 20, a first outlet 21, and a second outlet 22 that are circumferentially spaced apart. The first outlet 21 includes a first through hole 211 and a first arc-shaped groove 212 communicating with the first through hole 211. The second outlet 22 includes a second through hole 221 and a second arc-shaped groove 222 communicating with the second through hole 221. The valve block 24 includes a connecting portion 240 having a first notch 241 and a second notch 242. The connecting portion 240 fits against the end face of the valve seat 23 and can rotate relative to the valve seat 23 so that the first notch 241 can selectively communicate with the first through hole 211 or the first arc-shaped groove 212, and the second notch 242 can selectively communicate with the second through hole 221 or the second arc-shaped groove 222. Among them, when the first notch 241 communicates with the first through hole 211, the first outlet 21 is in a fully open state; when the first notch 241 communicates with the first arc-shaped groove 212, the first outlet 21 is in a throttling state; when the second notch 242 communicates with the second through hole 221, the second outlet 22 is in a fully open state; when the second notch 242 communicates with the second arc-shaped groove 222, the second outlet 22 is in a throttling state; when other positions of the connecting portion 240 other than the first notch 241 and the second notch 242 cover the first outlet 21, the first outlet 21 is in a closed state, and when other positions of the connecting portion 240 other than the first notch 241 and the second notch 242 cover the second outlet 22, the second outlet 22 is in a closed state.
[0046] Refer to Figure 3 , the end face of the valve seat 23 is a flat mating surface, and the valve block 24 can be attached to the end face of the valve seat 23 and perform a rotational movement at a certain angle. The inlet 20, the first outlet 21, and the second outlet 22 of the valve seat 23 are all arranged on the end face of the valve seat 23, and are opened on the circumferences with the central axis of the valve seat 23 as the center and different lengths as the radii, and are separated by a certain distance. The switching valve 2 further includes an inlet pipe, a first outlet pipe, and a second outlet pipe fixedly connected to the valve seat 23. The inlet pipe is communicated with the inlet 20, the first outlet pipe is communicated with the first outlet 21, and the second outlet pipe is communicated with the second outlet 22. The inlet pipe, the first outlet pipe, and the second outlet pipe are respectively communicated with the refrigeration cycle circuit 3, and can make various combinations of the throttled flow rates to meet the requirements of the refrigeration system.
[0047] The switching valve 2 may further include a controller and a motor (not shown in the figure). The controller controls the rotor of the motor to drive the valve block 24 to rotate relative to the valve seat 23. The connecting portion 240 of the valve block 24 is used for rotational mating with the end face of the valve seat 23. When the portion of the connecting portion 240 other than the first notch 241 and the second notch 242 rotates to cover the first outlet 21 of the valve seat 23, the first outlet 21 is in a closed state, and the refrigerant cannot flow out from the first outlet 21. On the contrary, when the connecting portion 240 rotates to not cover the first outlet 21, if the first notch 241 corresponds to the first through hole 211, the first outlet 21 is in a fully open state at this time, and the refrigerant directly flows out from the first through hole 211; if the first notch 241 corresponds to the first arc-shaped groove 212, the first outlet 21 is in a throttling state at this time, the refrigerant enters the first through hole 211, and then flows out from the first arc-shaped groove 212. Similarly, when the portion of the connecting portion 240 other than the first notch 241 and the second notch 242 rotates to cover the second outlet 22 of the valve seat 23, the second outlet 22 is in a closed state, and the refrigerant cannot flow out from the second outlet 22. On the contrary, when the second notch 242 of the connecting portion 240 corresponds to the second through hole 221, the second outlet 22 is in a fully open state at this time, and the refrigerant directly flows out from the second outlet 22. If the second notch 242 corresponds to the second arc-shaped groove 222, the second outlet 22 is in a throttling state at this time, the refrigerant enters the second through hole 221, and then flows out from the second arc-shaped groove 222.
[0048] It can be understood that the structural forms of the reversing valve 4 and the switching valve 2 are not limited to the illustrated examples, and there may be other structural forms, as long as the reversing valve 4 can achieve the reversing function and the switching valve 2 can achieve the on-off and throttling functions, which will not be elaborated herein.
[0049] In some embodiments, the refrigeration assembly 1 further includes a first throttling element 15 and / or a second throttling element 16. The first throttling element 15 is disposed in the first refrigerant branch 31 and communicates with the inlet of the first evaporator 13. The second throttling element 16 is disposed in the second refrigerant branch 32 and communicates with the inlet of the second evaporator 14.
[0050] Optionally, the first throttling element 15 can be, for example but not limited to, a capillary tube. Optionally, the second throttling element 16 can be, for example but not limited to, a capillary tube. As Figure 1 shown, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 11 becomes partially liquid refrigerant after being condensed and cooled by the condenser 12. After flowing through the switching valve 2, it becomes a low-temperature and low-pressure gas-liquid two-phase mixed refrigerant through the obstruction, flow restriction, and pressure reduction of the first throttling element 15 and / or the second throttling element 16, which is beneficial to improving the heat exchange efficiency of the condenser 12.
[0051] In some embodiments, the refrigeration system 10 further includes a first fan and a second fan. The first fan is used to guide the air flow through the first evaporator 13, and the second fan is used to guide the air flow through the second evaporator 14. The first fan and the second fan can respectively increase the air flow speed in their respective rooms, so as to make the cold quantity distribution uniform and improve the heat exchange efficiency.
[0052] In some embodiments, the refrigeration system 10 further includes a filtering device. The inlet of the filtering device communicates with the outlet of the condenser 12, and the outlet of the filtering device communicates with the inlet 20 of the switching valve 2. The filtering device is disposed in the main pipeline 30 and is located between the condenser 12 and the switching valve 2. The filtering device is used to filter impurities, dust, etc. in the refrigerant to prevent impurities and dust from entering the switching valve 2.
[0053] Figure 4 It is a schematic structural diagram of a refrigeration system according to another embodiment of the present application.
[0054] Referring to Figure 4 , the refrigeration system 10 provided by the embodiment of the present application is similar in structure to the Figure 1 shown refrigeration system 10. The difference is that the first evaporator 13 and the second evaporator 14 are arranged in series in the refrigeration cycle loop 3.
[0055] Specifically, the refrigeration cycle loop 3 includes a main pipeline 30 and a first refrigerant branch 31 and a second refrigerant branch 32 communicating with the main pipeline 30. The first refrigerant branch 31 and the second refrigerant branch 32 are arranged in parallel. The compressor 11, the condenser 12, and the second evaporator 14 are disposed in the main pipeline 30, and the first evaporator 13 is disposed in the first refrigerant branch 31.
[0056] The reversing valve 4 includes a first valve port 41, a second valve port 42, a third valve port 43 and a fourth valve port 44. The first valve port 41 is communicated with the outlet of the compressor 11, the second valve port 42 is communicated with the inlet of the condenser 12, the third valve port 43 is communicated with the inlet of the compressor 11, and the fourth valve port 44 is communicated with the outlet of the evaporator.
[0057] The switching valve 2 is arranged at the connection of the main pipeline 30 with the first refrigerant branch 31 and the second refrigerant branch 32. The switching valve 2 includes an inlet 20, a first outlet 21 and a second outlet 22. The inlet 20 is communicated with the outlet of the condenser 12, the first outlet 21 is communicated with the inlet of the first refrigerant branch 31, and the second outlet 22 is communicated with the inlet of the second refrigerant branch 32. Both the first outlet 21 and the second outlet 22 have a fully open state, a throttling state and a closed state.
[0058] Wherein, when the first valve port 41 is communicated with the fourth valve port 44, the second valve port 42 is communicated with the third valve port 43, and at the same time the first outlet 21 is in the fully open state, the second evaporator 14 performs a defrosting cycle; when the first valve port 41 is communicated with the second valve port 42, the third valve port 43 is communicated with the fourth valve port 44, and at the same time the first outlet 21 is in the fully open state and / or the second outlet 22 is in the fully open state, the refrigeration system 10 performs a rapid refrigeration cycle; when the first valve port 41 is communicated with the second valve port 42, the third valve port 43 is communicated with the fourth valve port 44, and at the same time the first outlet 21 is in the throttling state and / or the second outlet 22 is in the throttling state, the refrigeration system 10 performs an energy-saving refrigeration cycle.
[0059] In the embodiment of the present application, the refrigerant can form two circulation circuits with opposite directions through the reversing valve 4 and the switching valve 2, which is similar to the refrigeration system 10 shown above. The difference is that the first evaporator 13 and the second evaporator 14 are arranged in the refrigeration cycle circuit 3 in a series-parallel manner. During the defrosting process, the second evaporator 14 is used as a condenser, and the heat of the high-temperature and high-pressure gaseous refrigerant can defrost the second evaporator 14, while the first evaporator 13 is used as an evaporator. Finally, the refrigerant returns to the inlet of the compressor 11 as a low-temperature and low-pressure gas, avoiding the accumulation of some liquid refrigerant at the inlet of the compressor 11 due to incomplete evaporation in the first evaporator 13, and reducing the risk of liquid hammer generated when the compressor 11 is suddenly started. Figure 1 Shown is a schematic structural diagram of a refrigeration device according to an embodiment of the present application.
[0060] Figure 5 For a refrigeration device according to an embodiment of the present application.
[0061] Refer to Figure 5 , the embodiment of the present application provides a refrigeration device 100, including: a box body, the refrigeration system 10 of each embodiment of the present application, a sensor assembly and a controller. The refrigeration device 100 can be a refrigeration device such as a refrigerator, a freezer, a cold storage, etc.
[0062] A first chamber 101 and a second chamber 102 are provided inside the box body. The first evaporator 13 of the refrigeration system 10 is arranged in the first chamber 101, and the second evaporator 14 of the refrigeration system 10 is arranged in the second chamber 102. The sensor assembly is used to detect the environmental information of the first chamber and the environmental information of the second chamber. The controller is electrically connected to the sensor assembly, the compressor 11 of the refrigeration system 10, the reversing valve 4 and the switching valve 2 respectively. The controller is configured to control the reversing valve 4 and the switching valve 2 to work according to the environmental information of the first chamber 101 and the environmental information of the second chamber 102, so that the refrigeration system 10 executes any one of the defrosting cycle, the rapid refrigeration cycle and the energy-saving refrigeration cycle.
[0063] In the refrigeration device 100 provided by the embodiment of the present application, a reversing valve 4 is arranged in the refrigeration cycle loop 3 to realize the reverse operation of the refrigerant flow path to realize heat pump exhaust defrosting. At the same time, a switching valve 2 with a throttling function is also arranged in the refrigeration cycle loop, which can realize the switching between rapid refrigeration and energy-saving refrigeration, and effectively reduce the refrigeration power consumption of the system while realizing exhaust defrosting.
[0064] In some embodiments, the sensor assembly includes a first sensor, a second sensor, a third sensor and a fourth sensor. The first sensor is used to detect the temperature of the first chamber 101, the second sensor is used to detect the temperature of the second chamber 102, the third sensor is used to detect the temperature of the first evaporator 13, and the fourth sensor is used to detect the temperature of the second evaporator 14.
[0065] The refrigerator judges whether to end defrosting according to the temperatures of the first evaporator 13 and the second evaporator 14, and judges whether to perform rapid refrigeration or energy-saving refrigeration according to the temperatures of the first chamber 101 and the second chamber 102.
[0066] In some embodiments, the refrigeration system 10 further includes a first blower arranged in the first chamber 101 and a second blower arranged in the second chamber 102. When the refrigeration system 10 executes the rapid refrigeration cycle and the energy-saving refrigeration cycle, the first blower and / or the second blower is started. When the refrigeration system 10 executes the defrosting cycle, the first blower and / or the second blower stops rotating.
[0067] In this embodiment, when the refrigeration system 10 executes a rapid refrigeration cycle and an energy-saving refrigeration cycle, the first fan and / or the second fan is started, which can accelerate the cold air flow rate, shorten the refrigeration time, and improve the refrigeration efficiency. When the refrigeration system 10 executes a defrosting cycle, for example, when the first compartment 101 executes a defrosting cycle, the first sensor is used to detect the temperature of the first compartment 101. The first evaporator 13 is locally heated for defrosting, and the first fan stops rotating, which can prevent the temperature of the first compartment 101 from rising accordingly. After defrosting, there is no need to start rapid refrigeration, reducing the system power consumption. Similarly, when the second compartment 102 executes a defrosting cycle, the second sensor is used to detect the temperature of the second compartment 102. The second evaporator 14 is locally heated for defrosting, and the second fan stops rotating, which can prevent the temperature of the second compartment 102 from rising accordingly. After defrosting, there is no need to start rapid refrigeration, reducing the system power consumption.
[0068] As described above, the above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by 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 in that, Comprising: A refrigeration assembly, including a compressor, a condenser, a first evaporator, and a second evaporator; A refrigeration cycle circuit, including a main pipeline and a first refrigerant branch and a second refrigerant branch communicating with the main pipeline. The first refrigerant branch and the second refrigerant branch are arranged in parallel. The compressor and the condenser are sequentially arranged on the main pipeline. The first evaporator and the second evaporator are arranged in series or in parallel in the refrigeration cycle circuit; and A reversing valve, including a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port communicates with the outlet of the compressor. The second valve port communicates with the inlet of the condenser. The third valve port communicates with the inlet of the compressor. The fourth valve port communicates with the outlet of the first evaporator and / or the outlet of the second evaporator; A switching valve. The main pipeline communicates with the first refrigerant branch and the second refrigerant branch through the switching valve. Wherein, the switching valve includes an inlet, a first outlet, and a second outlet. The inlet communicates with the outlet of the condenser. The first outlet communicates with the first refrigerant branch. The second outlet communicates with the second refrigerant branch. Both the first outlet and the second outlet have a fully open state, a throttling state, and a closed state; Wherein, when the first valve port communicates with the fourth valve port, the second valve port communicates with the third valve port, and at the same time the first outlet and / or the second outlet is in the fully open state, the first evaporator and / or the second evaporator performs a defrosting cycle; when the first valve port communicates with the second valve port, the third valve port communicates with the fourth valve port, and at the same time the first outlet is in the fully open state and / or the second outlet is in the fully open state, the refrigeration system performs a rapid refrigeration cycle; when the first valve port communicates with the second valve port, the third valve port communicates with the fourth valve port, and at the same time the first outlet is in the throttling state and / or the second outlet is in the throttling state, the refrigeration system performs an energy-saving refrigeration cycle.
2. The refrigeration system according to claim 1, characterized in that, The first evaporator is arranged in the first refrigerant branch, the second evaporator is arranged in the second refrigerant branch, and the fourth valve port communicates with both the outlet of the first evaporator and the outlet of the second evaporator.
3. The refrigeration system according to claim 1, characterized in that, The first evaporator is arranged in the first refrigerant branch, the second evaporator is arranged in the main pipeline, and the fourth valve port communicates with the outlet of the second evaporator.
4. The refrigeration system according to claim 1, characterized in that, The reversing valve includes a first valve body and a second valve body arranged coaxially. The end face of the first valve body is provided with the first valve port, the second valve port, the third valve port, and the fourth valve port spaced apart circumferentially. The first valve port and the second valve port are opened on a circumference with the central axis of the first valve body as the center and a first length as the radius. The third valve port and the fourth valve port are opened on a circumference with the central axis of the first valve body as the center and a second length as the radius, and the first length is greater than the second length; The second valve body includes a rotating part, a first notch and a second notch provided on the rotating part. The rotating part is in contact with the end face of the first valve body and can rotate relative to the first valve body, so that the first notch can selectively communicate with any one of the first valve port and the second valve port, and the second notch can selectively communicate with any one of the third valve port and the fourth valve port.
5. The refrigeration system according to claim 1, wherein, The switching valve includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with the inlet, the first outlet and the second outlet which are circumferentially spaced apart. The first outlet includes a first through hole and a first arc-shaped groove communicating with the first through hole. The second outlet includes a second through hole and a second arc-shaped groove communicating with the second through hole. The valve block includes a connecting part having a first notch and a second notch. The connecting part is in contact with the end face of the valve seat and can rotate relative to the valve seat, so that the first notch can selectively communicate with the first through hole or the first arc-shaped groove, and the second notch can selectively communicate with the second through hole or the second arc-shaped groove. Wherein, when the first notch communicates with the first through hole, the first outlet is in a fully open state; when the first notch communicates with the first arc-shaped groove, the first outlet is in a throttling state; when the second notch communicates with the second through hole, the second outlet is in a fully open state; when the second notch communicates with the second arc-shaped groove, the second outlet is in a throttling state; when other positions of the connecting part except the first notch and the second notch cover the first outlet, the first outlet is in a closed state, and when other positions of the connecting part except the first notch and the second notch cover the second outlet, the second outlet is in a closed state.
6. The refrigeration system according to claim 1, characterized in that, The refrigeration assembly further includes a first throttling element and / or a second throttling element. The first throttling element is arranged in the first refrigerant branch and communicates with the inlet of the first evaporator. The second throttling element is arranged in the second refrigerant branch and communicates with the inlet of the second evaporator.
7. The refrigeration system according to claim 1, characterized in that, The refrigeration system further includes a first fan and a second fan. The first fan is used to guide air flow through the first evaporator, and the second fan is used to guide air flow through the second evaporator.
8. The refrigeration system according to claim 1, characterized in that, The refrigeration system further includes a filtering device. The inlet of the filtering device is communicated with the condenser, and the outlet of the filtering device is communicated with the inlet of the switching valve.
9. A refrigeration device, characterized in that, Comprising: A box body, in which a first compartment and a second compartment are provided; The refrigeration system according to any one of claims 1 to 8, wherein the first evaporator of the refrigeration system is arranged in the first compartment, and the second evaporator of the refrigeration system is arranged in the second compartment; A sensor assembly for detecting the environmental information of the first compartment and the environmental information of the second compartment; And A controller, electrically connected to the sensor assembly, the compressor, the reversing valve and the switching valve of the refrigeration system respectively, is configured to control the reversing valve and the switching valve to operate according to the environmental information of the first compartment and the environmental information of the second compartment, so that the refrigeration system performs any one of a defrosting cycle, a rapid refrigeration cycle and an energy-saving refrigeration cycle.
10. The refrigeration device according to claim 9, characterized in that, The sensor assembly includes a first sensor, a second sensor, a third sensor and a fourth sensor. The first sensor is used to detect the temperature of the first compartment, the second sensor is used to detect the temperature of the second compartment, the third sensor is used to detect the temperature of the first evaporator, and the fourth sensor is used to detect the temperature of the second evaporator.