Refrigerating system and refrigerating equipment

Abstract

The utility model belongs to the technical field related to refrigeration, and particularly relates to a refrigeration system and refrigeration equipment, and the refrigeration system comprises a refrigeration assembly which comprises a compressor, a condenser, an evaporator and a throttling element; the refrigeration circulation loop comprises a main pipeline and a bypass branch, the compressor, the condenser, the throttling element and the evaporator are sequentially arranged on the main pipeline, and a pipeline between an inlet of the condenser and an outlet of the throttling element is connected with the bypass branch in parallel; the valve body assembly comprises a switching valve, the switching valve comprises an inlet, a first outlet and a second outlet, the inlet is communicated with the outlet of the compressor, the first outlet is communicated with the inlet of the condenser, the second outlet is communicated with the bypass branch, the first outlet has a full-open state, a throttling state and a closed state, and the second outlet has a full-open state and a closed state; the refrigeration system is capable of performing any one of a defrosting cycle, a rapid refrigeration cycle, and an energy-saving refrigeration cycle. According to the application, the refrigeration power consumption of the system can be reduced while exhaust defrosting is realized.

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 degrees. 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 freezing 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 that can reduce the refrigeration power consumption of the system while realizing exhaust defrosting.

[0005] In a first aspect, this application proposes a refrigeration system, including: a refrigeration component, including a compressor, a condenser, an evaporator, and a throttling element; a refrigeration cycle loop, including a main pipeline and a bypass branch. Along the flow direction of the refrigerant, the compressor, the condenser, the throttling element, and the evaporator are sequentially arranged on the main pipeline, and the pipeline between the inlet of the condenser and the outlet of the throttling element is arranged in parallel with the bypass branch; and a switching valve, including an inlet, a first outlet, and a second outlet. The inlet is communicated with the outlet of the compressor, the first outlet is communicated with the inlet of the condenser, and the second outlet is communicated with the bypass branch. The first outlet has a fully open state, a throttling state, and a closed state, and the second outlet has a fully open state and a closed state; wherein, when the first outlet is in the closed state and the second outlet is in the fully open state, the refrigeration system executes a defrosting cycle; when the first outlet is in the fully open state and the second outlet is in the closed state, the refrigeration system executes a rapid refrigeration cycle; when the first outlet is in the throttling state and the second outlet is in the closed state, the refrigeration system executes an energy-saving refrigeration cycle.

[0006] Second aspect, the present application provides a refrigeration system, comprising: a refrigeration component, including a compressor, a condenser, an evaporator and a throttling element; a refrigeration cycle loop, the compressor, the condenser, the throttling element and the evaporator are sequentially arranged in the refrigeration cycle loop through pipelines; 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 communicated with the outlet of the compressor, the second valve port is communicated with the inlet of the condenser, the third valve port is communicated with the inlet of the compressor, and the fourth valve port is communicated with the outlet of the evaporator; and a switching valve, arranged between the outlet of the condenser and the inlet of the throttling element, the switching valve includes a third inlet and a third outlet, and the third outlet has a fully open state, a throttling state and a closed state; wherein, when the first valve port is communicated with the fourth valve port, the second valve port is communicated with the third valve port, and at the same time the third outlet is in the fully open state, the refrigeration system executes a defrosting cycle; when the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and at the same time the third outlet is in the fully open state, the refrigeration system executes a rapid refrigeration cycle; when the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and at the same time the third outlet is in the throttling state, the refrigeration system executes an energy-saving refrigeration cycle.

[0007] Third aspect, the present application provides a refrigeration device, comprising: a box body, a compartment is arranged in the box body; a refrigeration system as in the embodiments of the present application, the evaporator of the refrigeration system is arranged in the compartment; a sensor component, used for detecting the environmental information of the compartment; and a controller, electrically connected to the sensor component, the compressor of the refrigeration system and the valve body component respectively, the controller is configured to control the valve body component to work according to the environmental information of the compartment, so that the refrigeration system executes any one of a defrosting cycle, a rapid refrigeration cycle and an energy-saving refrigeration cycle.

[0008] According to the refrigeration system and the refrigeration device provided by the embodiments of the present application, by arranging a valve body component in the refrigeration cycle loop, and the valve body component includes a switching valve with a throttling function, not only can the high-temperature exhaust gas of the compressor be used to heat up the evaporator for defrosting, but also the switching between rapid refrigeration and energy-saving refrigeration can be realized, and while realizing exhaust gas defrosting, the refrigeration power consumption of the system can be effectively reduced.

[0009] 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 easy to understand, the following specifically illustrates the specific embodiments of the present application. Description of the Drawings

[0010] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. Among them:

[0011] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiments. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Also, throughout the drawings, the same reference numerals are used to denote the same components. Wherein:

[0012] Figure 1 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application;

[0013] Figure 2 is Figure 1 a schematic exploded view of the switching valve in the refrigeration system shown;

[0014] Figure 3 is a schematic structural diagram of a refrigeration system according to another embodiment of the present application;

[0015] Figure 4 is Figure 3 a schematic exploded view of the reversing valve in the refrigeration system shown;

[0016] Figure 5 is Figure 3 a schematic exploded view of the switching valve in the refrigeration system shown.

[0017] The reference numerals in the drawings are represented as follows:

[0018] 10, refrigeration system;

[0019] 1, refrigeration component; 11, compressor; 12, condenser; 13, evaporator; 14, throttling element;

[0020] 2, switching valve; 20, inlet; 21, first outlet; 211, first through hole; 212, first arc-shaped groove; 22, second outlet; 23, valve seat; 24, valve block; 241, notch; 242, connecting portion; 25, third inlet; 26, third outlet; 261, third through hole; 262, third arc-shaped groove;

[0021] 3, refrigeration cycle circuit; 31, main pipeline; 32, bypass branch;

[0022] 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; 5, check valve. Detailed embodiments

[0023] Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying 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 fully 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 the order of performance is explicitly stated. 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 indicates otherwise, terms such as "first" and "second" and other numerical terms used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the 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 in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation in addition to the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" another element or feature will then be oriented as "above" or "over" the other element or feature. Thus, the example term "below" can include both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0027] Figure 1 The structural schematic diagram of a refrigeration system according to an embodiment of the present application.

[0028] Refer to Figure 1 As shown in the figure, the refrigeration system 10 provided by the embodiment of the present application includes a refrigeration component 1, a valve body component, and a refrigeration cycle circuit 3. The refrigeration system 10 can be applied to refrigeration equipment, and can also be applied to refrigeration equipment such as freezers and cold storages. For ease of explanation, each embodiment 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, an evaporator 13, and a throttling element 14.

[0030] The refrigeration cycle circuit 3 includes a main pipeline 31 and a bypass branch 32. Along the flow direction of the refrigerant, the compressor 11, the condenser 12, the throttling element 14, and the evaporator 13 are sequentially arranged on the main pipeline 31, and the pipeline between the inlet of the condenser 12 and the outlet of the throttling element 14 is arranged in parallel with the bypass branch 32. The throttling element 14 can be, for example but not limited to, a capillary tube.

[0031] The valve body component includes a switching valve 2. 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 compressor 11, the first outlet 21 is communicated with the inlet of the condenser 12, the second outlet 22 is communicated with the bypass branch 32, the first outlet 21 has a fully open state, a throttling state, and a closed state, and the second outlet 22 has a fully open state and a closed state.

[0032] When the first outlet 21 is in the closed state and the second outlet 22 is in the fully open state, the refrigeration system 10 performs a defrosting cycle; when the first outlet 21 is in the fully open state and the second outlet 22 is in the closed state, the refrigeration system 10 performs a rapid refrigeration cycle; when the first outlet 21 is in the throttling state and the second outlet 22 is in the closed state, the refrigeration system 10 performs an energy-saving refrigeration cycle.

[0033] In the embodiments of the present application, the refrigerator can be a single-system refrigerator, and the single-system refrigerator includes a compartment and an evaporator 13 disposed in the compartment. The refrigerator can also be a dual-system refrigerator or a multi-system refrigerator. Among them, the dual-system refrigerator includes two compartments and two evaporators 13, and the multi-system refrigerator includes multiple compartments and multiple evaporators 13. Taking the single-system refrigerator as an example, specifically see Figure 1 , 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 compressor 11. The first outlet 21 is communicated with the inlet of the condenser 12. The second outlet 22 is communicated with the bypass branch 32. The first outlet 21 has a fully open state, a throttling state and a closed state. The second outlet 22 has a fully open state and a closed state.

[0034] In the defrosting mode, the first outlet 21 of the switching valve 2 is in the closed state and the second outlet 22 is in the fully open state. The bypass branch 32 is conducted. The switching valve 2 selects a large-flow path. At this time, the high-temperature refrigerant discharged from the outlet of the compressor 11 directly passes through the evaporator 13 to release heat, defrost the evaporator 13, and realize heat pump exhaust defrosting; when the temperature of the evaporator 13 is stable at the defrosting exit temperature for more than 1 minute, the defrosting is exited. Compared with defrosting using an electric heater in the related art, energy consumption can be reduced.

[0035] When the difference between the compartment temperature t1 and the start-up temperature tk of the compartment reaches 2°C or more, the refrigerator defaults to enter the rapid refrigeration mode, including when the customer sets a rapid refrigeration instruction, or in the first three cycles after defrosting, the refrigerator will turn on the rapid refrigeration mode. In the rapid refrigeration mode, when the first outlet 21 of the switching valve 2 is in the fully open state and the second outlet 22 is in the closed state, the switching valve 2 selects a large-flow path to increase the heat exchange medium and achieve rapid cooling. Among them, if it is rapid refrigeration after defrosting, when the switching valve 2 selects a large-flow path, it needs to last for three refrigeration cycles. During this process, the compartment is refrigerated. When the compartment temperature drops to the shutdown temperature ts, the switching valve 2 closes and locks itself, turns on the pressure-holding function, and the refrigerant stops flowing to ensure that the high and low pressure differences remain unchanged. When the compartment temperature t1 returns to the start-up temperature tk, the first outlet 21 of the switching valve 2 is in the fully open state and the second outlet 22 is in the closed state, reducing the high and low pressure differences and establishing pipeline balance. After 30S, the compressor 11 starts refrigeration. After repeating these steps for three refrigeration cycles, it enters the energy-saving refrigeration mode.

[0036] In the energy-saving refrigeration mode, the refrigerator compares the compartment temperature t1 with the compartment start-stop temperatures (tk and ts). When the compartment temperature t1 is higher than the start temperature tk, the refrigerator starts refrigerating. At this time, the first outlet 21 of the switching valve 2 is in a throttling state and the second outlet 22 is in a closed-open state. The switching valve 2 selects the small-flow path, and the refrigerator starts to cool down. After the compartment temperature t1 drops to the stop temperature ts, the refrigerator ends the refrigeration request and the compressor 11 stops. At this time, the switching valve 2 closes to maintain pressure, and at the moment when the compressor 11 stops, the switching valve 2 self-locks to maintain pressure. The self-locking of the switching valve 2 cuts off the refrigeration circuit, and the refrigerant stops flowing, keeping the high-pressure and low-pressure end pressures of the circuit unchanged and ensuring the pressure difference. As the compressor 11 stops, the compartment will heat up accordingly. When the compartment temperature t1 rises to the start temperature tk, there is a refrigeration request. The first outlet 21 of the switching valve 2 is in a throttling state, selecting the small-flow path to establish pipeline balance. The compressor 11 starts after a 30S delay, which can not only reduce the total waste of energy caused by the restoration of the pressure difference in the pipeline after shutdown, but also, the delayed startup will not cause too large a pressure difference and damage the compressor 11. After multiple refrigeration cycles, or after 72h, the refrigerator will enter the forced defrosting stage.

[0037] According to the refrigeration system provided by the embodiment of the present application, by setting a bypass branch 32 in the refrigeration cycle circuit 3, the high-temperature exhaust gas of the compressor 11 can be used to heat up and defrost the evaporator 13. At the same time, a switching valve 2 with a throttling function is also set in the refrigeration cycle circuit 3, 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.

[0038] Figure 2 For Figure 1 Schematic diagram of the exploded structure of the switching valve in the refrigeration system shown.

[0039] 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 from each other. 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 valve block 24 includes a connecting portion 242 having a notch 241. The connecting portion 242 fits against the end face of the valve seat 23 and can rotate relative to the valve seat 23 so that the notch 241 can selectively communicate with the first outlet 21 or the second outlet 22. When the notch 241 communicates with the first through hole 211, the first outlet 21 is in a fully open state; when the notch 241 communicates with the first arc-shaped groove 212, the first outlet 21 is in a throttling state; when the notch 241 communicates with the second outlet 22, the second outlet 22 is in a fully open state; when the portion of the connecting portion 242 other than the notch 241 covers the first outlet 21, the first outlet 21 is in a closed state; when the portion of the connecting portion 242 other than the notch 241 covers the second outlet 22, the second outlet 22 is in a closed state.

[0040] Refer to Figure 2 , the end face of the valve seat 23 is a flat mating surface, and the valve block 24 can fit against 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 provided on the end face of the valve seat 23 and are opened on circumferences centered on the central axis of the valve seat 23 with different lengths as radii and are spaced apart 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 communicates with the inlet 20, the first outlet pipe communicates with the first outlet 21, and the second outlet pipe communicates with the second outlet 22. The inlet pipe, the first outlet pipe, and the second outlet pipe are respectively connected to the refrigeration cycle circuit 3, and various combinations of throttled flow rates can be made to meet the requirements of the refrigeration system.

[0041] 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 242 of the valve block 24 is used for rotational cooperation with the end face of the valve seat 23. When the portion of the connecting portion 242 other than the notch 241 rotates to cover the first outlet 21 of the valve seat 23, the first outlet 21 is in the closed state, and the refrigerant cannot flow out from the first outlet 21. Conversely, when the connecting portion 242 rotates to uncover the first outlet 21, if the notch 241 corresponds to the first through hole 211 of the first outlet 41, the first outlet 21 is in the fully open state at this time, and the refrigerant directly flows out from the first through hole 211; if the notch 241 corresponds to the first arc-shaped groove 212 of the first outlet 21, the first outlet 21 is in the 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 242 other than the notch 241 rotates to cover the second outlet 22 of the valve seat 23, the second outlet 22 is in the closed state, and the refrigerant cannot flow out from the second outlet 22. Conversely, when the notch 241 of the connecting portion 242 corresponds to the second outlet 22, the second outlet 22 is in the fully open state at this time, and the refrigerant directly flows out from the second outlet 22.

[0042] It can be understood that the switching valve 2 in this embodiment is not limited to the structure shown in the figure, and may also have other different structures, as long as it can satisfy one inlet and two outlets, and the working states of the first outlet 21 include the fully open state, the throttling state and the closed state, and the working states of the second outlet 22 include the fully open state and the closed state, which will not be elaborated here.

[0043] In some embodiments, the valve body assembly further includes a check valve 5. The check valve 5 is disposed in the bypass branch 32 and communicates with the inlet of the evaporator 13. As Figure 1 shown, the check valve 5 is disposed in the bypass branch 32. When the first outlet 21 of the switching valve 2 is closed and the second outlet 22 is in the fully open state, the refrigeration system 10 performs a defrosting cycle, and the high-temperature exhaust gas of the compressor 11 directly defrosts the evaporator 13. The setting of the check valve 5 can prevent the refrigerant from flowing back in the circulation loop.

[0044] In some embodiments, the refrigeration system 10 further includes a blower. The blower is used to guide the air flow to flow through the evaporator 13. The blower can increase the air flow speed in the compartment, so that the cold quantity is evenly distributed and the heat exchange efficiency is improved.

[0045] 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 31 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.

[0046] Figure 3 Schematic structural diagram of a refrigeration system according to another embodiment of the present application.

[0047] Referring to Figure 3 , the embodiment of the present application further provides a refrigeration system, which is similar in structure and function to the refrigeration system 10 shown in Figure 1 , and can all achieve three functions of defrosting cycle, rapid refrigeration cycle and energy-saving refrigeration cycle. The difference is that the valve body components of the defrosting cycle and the structure of the refrigeration cycle circuit are different.

[0048] Specifically, the refrigeration system 10 includes a refrigeration component 1, a valve body component and a refrigeration cycle circuit 3.

[0049] The refrigeration component 1 includes a compressor 11, a condenser 12, an evaporator 13 and a throttling element 14. The compressor 11, the condenser 12, the throttling element 14 and the evaporator 13 are sequentially arranged in the refrigeration cycle circuit 3 through pipelines. The throttling element 14 can be, for example but not limited to, a capillary tube.

[0050] The valve body component includes a reversing valve 4 and a switching valve 2. 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 13. The switching valve 2 is arranged between the outlet of the condenser 12 and the inlet of the throttling element 14. The switching valve 2 includes a third inlet 25 and a third outlet 26. The third outlet 26 has a fully open state, a throttling state and a closed state.

[0051] 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 third outlet 26 is in the fully open state, the refrigeration system 10 executes 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 third outlet 26 is in the fully open state, the refrigeration system 10 executes 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 third outlet 26 is in the throttling state, the refrigeration system 10 executes an energy-saving refrigeration cycle.

[0052] In this embodiment, the refrigerant can form two circulation loops with opposite directions through the reversing valve 4 and the switching valve 2. Among them, the first circulation loop is as follows: the first valve port 41 of the reversing valve 4 is communicated with the second valve port 42, and the third valve port 43 is communicated with the fourth valve port 44. At the same time, the third outlet 26 of the switching valve 2 is opened, and 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 in 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 becomes a low-temperature and low-pressure gas-liquid two-phase mixed refrigerant after being blocked, limited in flow, and depressurized by the throttling element 14. Among them, the liquid refrigerant absorbs heat by evaporation through the evaporator 13, takes away the heat of the compartment and becomes a low-temperature and low-pressure gas, and then returns to the compressor 11, realizing a primary refrigeration cycle for the compartment. Among them, when the third outlet 26 is in the fully open state, the refrigeration system 10 executes a rapid refrigeration cycle. When the third outlet 26 is in the throttling state, the refrigeration system 10 executes an energy-saving refrigeration cycle.

[0053] The second circulation 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. At the same time, when the third outlet 26 is opened, 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 evaporator 13, and the evaporator 13 is defrosted by using the heat of the high-temperature and high-pressure gaseous refrigerant. After being condensed and dissipated heat through the evaporator 13, it becomes a liquid refrigerant. The liquid refrigerant flows through the switching valve 2 and the condenser 12, absorbs heat by evaporation and becomes a low-temperature and low-pressure gas, and returns to the inlet of the compressor 11, thereby realizing heat pump exhaust defrosting.

[0054] During the defrosting process, since the evaporator 13 is used as a condenser, the heat of the high-temperature and high-pressure gaseous refrigerant can defrost the evaporator 13, and the condenser 12 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 evaporator 13, and reducing the risk of liquid hammer generated when the compressor 11 suddenly starts up.

[0055] Figure 4 For Figure 3 Schematic diagram of the exploded structure of the reversing valve in the refrigeration system shown.

[0056] 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 from each other. 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;

[0057] The second valve body 46 includes a rotating part 460 and a first notch 461 and a second notch 462 provided on the rotating part 460. The rotating part 460 is attached to 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.

[0058] Refer to Figure 4 , the end face of the first valve body 45 is a flat mating surface, and the second valve body 46 can be attached to 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 from each other, 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.

[0059] 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.

[0060] Figure 5 For Figure 3 the exploded structural schematic diagram of the switching valve in the shown refrigeration system.

[0061] 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 a third inlet 25 and a third outlet 26 that are circumferentially spaced apart from each other. The third outlet 26 includes a third through hole 261 and a third arc-shaped groove 262 communicated with the third through hole 261. The valve block 24 includes a connecting part 242 having a notch 241. The connecting part 242 is attached to the end face of the valve seat 23 and can rotate relative to the valve seat 23 so that the notch 241 can selectively communicate with the third through hole 261 or the third arc-shaped groove 262. When the notch 241 communicates with the third through hole 261, the third outlet 26 is in a fully open state. When the notch 241 communicates with the third arc-shaped groove 262, the third outlet 26 is in a throttling state. When the part of the connecting part 242 other than the notch 241 covers the third outlet 26, the third outlet 26 is in a closed state.

[0062] Refer to Figure 5 , the structure of the switching valve 2 is similar to that of the switching valve 2 in Figure 2 , the difference is that the switching valve 2 is a one-in-one-out electromagnetic valve. The third outlet 26 has a fully open state, a throttling state, and a closed state. The structure of the third outlet 26 is the same as that of the first outlet 21 or the second outlet 22 of the switching valve 2 in Figure 2 and will not be described in detail.

[0063] In some embodiments, the refrigeration system 10 further includes a blower for guiding air flow through the evaporator 13. The blower can increase the air flow speed in the compartment to make the cold quantity distribution uniform and improve the defrosting efficiency of the evaporator 13.

[0064] In some embodiments, the refrigeration system 10 further includes a filtering device. The inlet of the filtering device is communicated with the outlet of the condenser 12, and the outlet of the filtering device is communicated with the third inlet 25 of the switching valve 2. The filtering device is arranged in the main pipeline 31 and 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.

[0065] In addition, the refrigeration equipment provided by the embodiments of the present application includes: a box body, the refrigeration system 10 of each embodiment of the present application, a sensor assembly, and a controller. This refrigeration equipment can be applied to various refrigeration-required equipment such as refrigerators, freezers, cold storages, etc.

[0066] A compartment is arranged in the box body, and the compartment can be at least one of a refrigerating compartment, a freezing compartment, and a variable-temperature compartment. The evaporator 13 of the refrigeration system 10 is arranged in the compartment. The number of evaporators 13 can be the same as the number of compartments or less than the number of compartments. Blowers can be respectively arranged in the compartments.

[0067] The sensor assembly is used to detect the environmental information of the compartment. The environmental information includes the temperature of the compartment, the temperature of the evaporator 13, the ambient temperature, and the ambient relative humidity, etc. The sensor assembly includes a first sensor, a second sensor, and a defrosting sensor. The first sensor is used to detect the temperature of the compartment, the second sensor is used to detect the ambient temperature and the ambient relative humidity, and the defrosting sensor is used to detect the temperature of the evaporator 13. Whether to end defrosting is determined according to the temperature of the evaporator 13.

[0068] The controller is respectively electrically connected to the sensor assembly, the compressor 11 of the refrigeration system 10, and the valve body assembly. The controller is configured to control the valve body assembly to work according to the environmental information of the compartment so that the refrigeration system 10 executes any one of a defrosting cycle, a rapid refrigeration cycle, and an energy-saving refrigeration cycle.

[0069] As mentioned above, the above are only the preferred specific embodiments 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 technical field of the present application within the technical scope disclosed by the present application should be covered within 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, an evaporator and a throttling element; A refrigeration cycle circuit, including a main pipeline and a bypass branch. Along the flow direction of the refrigerant, the compressor, the condenser, the throttling element and the evaporator are sequentially arranged on the main pipeline, and the pipeline between the inlet of the condenser and the outlet of the throttling element is arranged in parallel with the bypass branch; And A valve body assembly, including a switching valve. The switching valve includes an inlet, a first outlet and a second outlet. The inlet is communicated with the outlet of the compressor, the first outlet is communicated with the inlet of the condenser, the second outlet is communicated with the bypass branch. The first outlet has a fully open state, a throttling state and a closed state, and the second outlet has a fully open state and a closed state; Wherein, when the first outlet is in the closed state and the second outlet is in the fully open state, the refrigeration system performs a defrosting cycle; when the first outlet is in the fully open state and the second outlet is in the closed state, the refrigeration system performs a rapid refrigeration cycle; when the first outlet is in the throttling state and the second outlet is in the closed state, the refrigeration system performs an energy-saving refrigeration cycle.

2. The refrigeration system according to claim 1, characterized in that, 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 from each other. The first outlet includes a first through hole and a first arc-shaped groove communicated with the first through hole. The valve block includes a connecting portion with a notch. The connecting portion is attached to the end face of the valve seat and can rotate relative to the valve seat so that the notch can selectively communicate with the first outlet or the second outlet; Wherein, when the notch communicates with the first through hole, the first outlet is in the fully open state; when the notch communicates with the first arc-shaped groove, the first outlet is in the throttling state; when the notch communicates with the second outlet, the second outlet is in the fully open state; when the portion of the connecting portion other than the notch covers the first outlet, the first outlet is in the closed state, and when the portion of the connecting portion other than the notch covers the second outlet, the second outlet is in the closed state.

3. The refrigeration system according to claim 1, wherein The valve body assembly further includes a check valve, and the check valve is arranged on the bypass branch and communicated with the inlet of the evaporator.

4. The refrigeration system according to claim 1, characterized in that, The refrigeration system further includes a blower, and the blower is used to guide the air flow to flow through the evaporator.

5. A refrigeration system, characterized in that, Comprising: A refrigeration assembly, including a compressor, a condenser, an evaporator and a throttling element; A refrigeration cycle circuit, and the compressor, the condenser, the throttling element and the evaporator are sequentially arranged on the refrigeration cycle circuit through pipelines; The valve body assembly includes a reversing valve and a switching valve. The reversing valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is communicated with the outlet of the compressor, the second valve port is communicated with the inlet of the condenser, the third valve port is communicated with the inlet of the compressor, and the fourth valve port is communicated with the outlet of the evaporator. The switching valve is arranged between the outlet of the condenser and the inlet of the throttling element. The switching valve includes a third inlet and a third outlet, and the third outlet has a fully open state, a throttling state, and a closed state. Wherein, when the first valve port is communicated with the fourth valve port, the second valve port is communicated with the third valve port, and the third outlet is in the fully open state, the refrigeration system executes a defrosting cycle. When the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the third outlet is in the fully open state, the refrigeration system executes a rapid refrigeration cycle. When the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and the third outlet is in the throttling state, the refrigeration system executes an energy-saving refrigeration cycle.

6. The refrigeration system according to claim 5, wherein, 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 which are distributed at intervals along its circumferential direction. The first valve port and the second valve port are opened on a circumference centered on the central axis of the first valve body and with a first length as the radius. The third valve port and the fourth valve port are opened on a circumference centered on the central axis of the first valve body and with a second length as the radius, and the first length is greater than the second length. The second valve body includes a rotating part and a first notch and a second notch arranged on the rotating part. The rotating part is attached to 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.

7. The refrigeration system according to claim 5, characterized in that, The switching valve includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with the third inlet and the third outlet which are distributed at intervals along its circumferential direction. The third outlet includes a third through hole and a third arc-shaped groove communicated with the third through hole. The valve block includes a connecting part with a notch. The connecting part is attached to the end face of the valve seat and can rotate relative to the valve seat so that the notch can selectively communicate with the third through hole or the third arc-shaped groove. Wherein, when the notch is communicated with the third through hole, the third outlet is in the fully open state. When the notch is communicated with the third arc-shaped groove, the third outlet is in the throttling state. When the part of the connecting part other than the notch covers the third outlet, the third outlet is in the closed state.

8. The refrigeration system according to claim 5, wherein, The refrigeration system further includes a blower, and the blower is used to guide air flow to flow through the evaporator.

9. The refrigeration system according to claim 5, wherein The refrigeration system further includes a filtering device, an inlet of the filtering device is communicated with an outlet of the condenser, and an outlet of the filtering device is communicated with the third inlet of the switching valve.

10. A refrigeration device, characterized in that, Comprising: a box body, a compartment is arranged inside the box body; The refrigeration system according to any one of claims 1-9, an evaporator of the refrigeration system is arranged in the compartment; a sensor assembly for detecting environmental information of the compartment; and a controller, electrically connected to the sensor assembly, a compressor of the refrigeration system and a valve body assembly respectively, the controller is configured to control the valve body assembly to work according to the environmental information of the compartment, so that the refrigeration system executes any one of a defrosting cycle, a rapid refrigeration cycle and an energy-saving refrigeration cycle.

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