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 device.The refrigeration system comprises a refrigeration assembly, a first evaporator, a second evaporator and a third evaporator; an anti-condensation pipe; according to the refrigeration circulation loop, a first evaporator is arranged on a first refrigerant branch, a third evaporator is arranged on a third refrigerant branch, and an anti-condensation pipe and a bypass branch are arranged in parallel; the valve body is provided with a first inlet, a second inlet, a first outlet, a second outlet and a third outlet, the first inlet is communicated with the outlet of the anti-condensation pipe, the second inlet is communicated with the bypass branch, the first outlet is communicated with the first refrigerant branch, the second outlet is communicated with the second refrigerant branch, and the third outlet is communicated with the third refrigerant branch. The condensation heat management and flow distribution can be balanced by only adopting one valve body, the control logic is simple, and the stability of system operation can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration, and more specifically, to a refrigeration system and a refrigeration device. Background Art

[0002] During the use of a multi-system refrigeration device, there are often situations where a single compartment or multiple compartments need to be cooled. Facing the cooling requirements of different combinations of compartments, there may sometimes be a situation where a certain compartment is over-cooled or under-cooled, which affects the user experience, increases the power consumption, and wastes resources. In addition, in order to prevent condensation, anti-condensation tubes are generally provided in the peripheral box linings of the freezer compartments of general refrigeration devices. However, condensation does not occur under medium and low humidity environmental conditions, and it is necessary for the refrigerant to flow without passing through the anti-condensation tubes to reduce the heat load of the box body. In order to make the flow distribution more reasonable and improve the energy efficiency of the product, multiple valves are generally provided in the system, and the control logic is complex, which affects the stability of the system operation. Summary of the Utility Model

[0003] The purpose of the present application is to provide a refrigeration system and a refrigeration device, which can achieve a balance in condensation heat management and flow distribution by using only one valve body, with a simple control logic, which is beneficial to improving the stability of the system operation.

[0004] In a first aspect, the present application provides a refrigeration system, including: an anti-condensation tube; a refrigeration assembly, including a compressor, a condenser, a first evaporator, a second evaporator, and a third evaporator; a refrigeration cycle circuit, including a main pipeline and a first refrigerant branch, a second refrigerant branch, a third refrigerant branch, and a bypass branch respectively communicating with the main pipeline. The first refrigerant branch, the second refrigerant branch, and the third refrigerant branch are arranged in parallel. The first evaporator is arranged in the first refrigerant branch, the third evaporator is arranged in the third refrigerant branch. The outlet of the first evaporator, the outlet of the second refrigerant branch, and the outlet of the third evaporator are all communicated with the inlet of the second evaporator. The second evaporator, the compressor, the condenser, and the anti-condensation tube are sequentially arranged in the main pipeline. The bypass branch is arranged in parallel with the anti-condensation tube; and a valve body, arranged at the connection of the first refrigerant branch, the second refrigerant branch, the third refrigerant branch and the main pipeline. The valve body has a first inlet, a second inlet, a first outlet, a second outlet, and a third outlet. The first inlet is communicated with the outlet of the anti-condensation tube, the second inlet is communicated with the bypass branch, the first outlet is communicated with the first refrigerant branch, the second outlet is communicated with the second refrigerant branch, and the third outlet is communicated with the third refrigerant branch. Wherein, the valve body is configured such that the first inlet is selectively conducted with any one of the first outlet, the second outlet, and the third outlet; or, the second inlet is selectively conducted with any one of the first outlet, the second outlet, and the third outlet.

[0005] According to the refrigeration system and refrigeration equipment provided by the embodiments of the present application, by arranging the first evaporator for refrigerating the refrigerated compartment, the second evaporator for refrigerating the frozen compartment, and the third evaporator for refrigerating the variable-temperature compartment in a series-parallel or parallel manner in the refrigeration cycle circuit, arranging the anti-condensation pipe in parallel with the bypass branch, and at the same time using a two-in-three-out valve body to communicate with each branch, the valve body can be controlled according to the environmental information of the refrigeration equipment, and the rotational speed of the compressor can be adjusted according to the number of compartments requesting refrigeration in the frozen compartment, the refrigerated compartment, and the variable-temperature compartment. Since only one valve body can achieve a balance in anti-condensation management and flow distribution, the control logic is simple, which is beneficial to improving the stability of the system operation.

[0006] In addition, the refrigeration system according to the present application may further have the following additional technical features:

[0007] In some embodiments of the present application, the valve body includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with a first inlet, a second inlet, a first outlet, a second outlet, and a third outlet that are circumferentially spaced apart. The first inlet and the second inlet are opened on a circumference centered on the central axis of the valve seat and having a first length as the radius. The first outlet, the second outlet, and the third outlet are opened on a circumference centered on the central axis of the valve seat and having a second length as the radius, and the first length is greater than the second length; the valve block includes a connecting portion and a first notch and a second notch provided on the connecting portion. The connecting portion fits 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 any one of the first inlet and the second inlet, and the second notch can selectively communicate with any one of the first outlet, the second outlet, and the third outlet.

[0008] In some embodiments of the present application, the refrigeration assembly further includes a first throttling element and / or a second throttling element and / or a third 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. The third throttling element is arranged in the third refrigerant branch and communicates with the inlet of the third evaporator.

[0009] Second aspect, the present application provides a refrigeration system, including: an anti-condensation tube; a refrigeration component, including a compressor, a condenser, a first evaporator, a second evaporator, and a third evaporator; a refrigeration cycle circuit, including a main pipeline and a first refrigerant branch, a second refrigerant branch, a third refrigerant branch, and a bypass branch respectively communicating with the main pipeline. The first refrigerant branch, the second refrigerant branch, and the third refrigerant branch are arranged in parallel. The first evaporator is arranged in the first refrigerant branch, the second evaporator is arranged in the second refrigerant branch, the third evaporator is arranged in the third refrigerant branch. The outlets of the first evaporator, the second evaporator, and the third evaporator are all communicated with the inlet of the compressor. The compressor, the condenser, and the anti-condensation tube are all arranged in the main pipeline. The bypass branch is arranged in parallel with the anti-condensation tube; and a valve body, having a first inlet, a second inlet, a first outlet, a second outlet, and a third outlet. The first inlet is communicated with the outlet of the anti-condensation tube, the second inlet is communicated with the bypass branch, the first outlet is communicated with the first refrigerant branch, the second outlet is communicated with the second refrigerant branch, and the third outlet is communicated with the third refrigerant branch. Wherein, the valve body is configured such that the first inlet is selectively communicated with any one of the first outlet, the second outlet, and the third outlet; or, the second inlet is selectively communicated with any one of the first outlet, the second outlet, and the third outlet.

[0010] In some embodiments of the present application, the valve body includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with a first inlet, a second inlet, a first outlet, a second outlet, and a third outlet that are circumferentially spaced apart. The first inlet and the second inlet are opened on a circumference centered on the central axis of the valve seat and with a first length as the radius. The first outlet, the second outlet, and the third outlet are opened on a circumference centered on the central axis of the valve seat and with a second length as the radius, and the first length is greater than the second length; the valve block includes a connecting portion and a first notch and a second notch provided on the connecting portion. The connecting portion fits 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 any one of the first inlet and the second inlet, and the second notch can selectively communicate with any one of the first outlet, the second outlet, and the third outlet.

[0011] In some embodiments of the present application, the refrigeration component further includes a first throttling element and / or a second throttling element and / or a third throttling element. The first throttling element is arranged in the first refrigerant branch and communicated with the inlet of the first evaporator. The second throttling element is arranged in the second refrigerant branch and communicated with the inlet of the second evaporator. The third throttling element is arranged in the third refrigerant branch and communicated with the inlet of the third evaporator.

[0012] In a third aspect, the present application provides a refrigeration device, which includes a box body. A freezing compartment, a refrigerating compartment and a variable-temperature compartment are arranged inside the box body; the refrigeration systems of various embodiments of the present application. The first evaporator of the refrigeration system is arranged in the refrigerating compartment, the second evaporator is arranged in the freezing compartment, and the third evaporator is arranged in the variable-temperature compartment; a sensor assembly for detecting the environmental information of the refrigeration device; and a controller, which is electrically connected to the sensor assembly, the compressor and the valve body of the refrigeration system respectively. The controller is configured to control the opening and closing of the valve body of the refrigeration system according to the environmental information, and adjust the rotational speed of the compressor according to the number of compartments requesting refrigeration.

[0013] In some embodiments of the present application, the refrigeration device further includes a first fan, a second fan and a third fan. The first fan is arranged in the refrigerating compartment, the second fan is arranged in the freezing compartment, and the third fan is arranged in the variable-temperature compartment.

[0014] In some embodiments of the present application, the sensor assembly includes a first sensor, a second sensor, a third sensor, and an environmental temperature and humidity sensor. The first sensor is used to detect the temperature of the refrigerating compartment, the second sensor is used to detect the temperature of the freezing compartment, the third sensor is used to detect the temperature of the variable-temperature compartment, and the environmental temperature and humidity sensor is used to detect the environmental temperature and relative humidity.

[0015] In some embodiments of the present application, center beams are respectively arranged between the refrigerating compartment and the variable-temperature compartment and between the variable-temperature compartment and the freezing compartment. The anti-condensation pipe of the refrigeration system is arranged on one side of the freezing compartment, the variable-temperature compartment and the refrigerating compartment, and is arranged close to the center beam.

[0016] 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 description. 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 specifically given below. Description of the Drawings

[0017] 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:

[0018] 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:

[0019] Figure 1Schematic structural diagram of a refrigeration system according to an embodiment of the present application;

[0020] Figure 2 is Figure 1 Exploded structural diagram of the valve body in the refrigeration system shown;

[0021] Figure 3 Schematic structural diagram of a refrigeration system according to another embodiment of the present application;

[0022] Figure 4 Schematic structural diagram of a refrigeration device according to an embodiment of the present application;

[0023] Figure 5 Schematic diagram of the operation process of a refrigeration device according to an embodiment of the present application.

[0024] The reference numerals in the drawings are represented as follows:

[0025] 10, refrigeration system;

[0026] 1, refrigeration component; 11, compressor; 12, condenser; 13, first evaporator; 14, second evaporator; 15, first throttling element; 16, second throttling element; 17, third evaporator; 18, third throttling element;

[0027] 2, anti-condensation pipe;

[0028] 3, refrigeration cycle circuit; 30, main pipeline; 31, first refrigerant branch; 32, second refrigerant branch; 33, third refrigerant branch; 34, bypass branch;

[0029] 4, valve body; 41, first inlet; 42, second inlet; 43, first outlet; 44, second outlet; 45, third outlet; 46, valve seat; 47, valve block;

[0030] 470, connecting portion; 471, first notch; 472, second notch;

[0031] 5, filtering device;

[0032] 100, refrigeration device; 101, refrigerated compartment; 102, frozen compartment; 103, variable temperature compartment. Detailed implementation manners

[0033] 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 fully conveyed to those skilled in the art.

[0034] 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 an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0035] 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", "second", and other numerical terms when 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.

[0036] 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 the upper and lower orientations. 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.

[0037] Figure 1 It is a schematic structural diagram of a refrigeration system according to an embodiment of the present application.

[0038] Refer to Figure 1 , an embodiment of the present application provides a refrigeration system 10, including: a refrigeration component 1, an anti-condensation tube 2, a refrigeration cycle circuit 3, and a valve body 4.

[0039] The refrigerating compartment 101 is generally used to provide a temperature of about 5 °C for food preservation. The freezing compartment 102 is generally used to provide a temperature of about -18 °C for food freezing preservation. The temperature of the variable-temperature compartment 103 can be switched within the temperature range of the refrigerating compartment and the freezing compartment, realizing the optimization of the internal space of the refrigeration equipment and avoiding the problem of insufficient space in a single compartment in the refrigerating compartment or the freezing compartment. However, due to the large temperature difference between the variable-temperature compartment 103 and the refrigerating compartment 101 or the freezing compartment 102 after temperature change, condensation or frosting will occur on the inner wall and cross beam of the refrigeration equipment adjacent to the variable-temperature compartment 103 and the refrigerating compartment 101 or the freezing compartment 102. Therefore, anti-condensation pipes 2 are usually installed around the refrigerating compartment 101, the freezing compartment 102 and the variable-temperature compartment 103 respectively. The high-temperature liquid refrigerant in the anti-condensation pipes 2 flows through each cross beam and vertical beam, etc., heats their surfaces, balances the temperature difference with the environment, and realizes anti-condensation. The anti-condensation pipes 2 can be metal pipes, such as copper pipes, for circulating refrigerants and other refrigerants.

[0040] The refrigeration assembly 1 includes a compressor 11, a condenser 12, a first evaporator 13, a second evaporator 14, and a third evaporator 17. The first evaporator 13 is used to refrigerate the refrigerating compartment 101, the second evaporator 14 is used to refrigerate the freezing compartment 102, and the third evaporator 17 is used to refrigerate the variable-temperature compartment 103.

[0041] The refrigeration cycle circuit 3 includes a main pipeline 30 and a first refrigerant branch 31, a second refrigerant branch 32, a third refrigerant branch 33 and a bypass branch 34 respectively communicated with the main pipeline 30. The first refrigerant branch 31, the second refrigerant branch 32 and the third refrigerant branch 33 are arranged in parallel. The first evaporator 13 is arranged in the first refrigerant branch 31, the third evaporator 17 is arranged in the third refrigerant branch 33. The outlets of the first evaporator 13, the second refrigerant branch 32 and the third evaporator 17 are all communicated with the inlet of the second evaporator 14. The second evaporator 14, the compressor 11, the condenser 12 and the anti-condensation pipes 2 are sequentially arranged in the main pipeline 30. The bypass branch 34 is arranged in parallel with the anti-condensation pipes 2.

[0042] The valve body 4 is arranged at the connection positions of the first refrigerant branch 31, the second refrigerant branch 32, the third refrigerant branch 33 and the main pipeline 30. The valve body 4 has a first inlet 41, a second inlet 42, a first outlet 43, a second outlet 44 and a third outlet 45. The first inlet 41 is communicated with the outlet of the anti-condensation pipe 2, the second inlet 42 is communicated with the bypass branch 34, the first outlet 43 is communicated with the first refrigerant branch 31, the second outlet 44 is communicated with the second refrigerant branch 32, and the third outlet 45 is communicated with the third refrigerant branch 33. Wherein, the first inlet 41 can be selectively conducted with any one of the first outlet 43, the second outlet 44 and the third outlet 45, or the second inlet 42 can be selectively conducted with any one of the first outlet 43, the second outlet 44 and the third outlet 45.

[0043] In this embodiment, the valve body 4 has a first inlet 41, a second inlet 42, a first outlet 43, a second outlet 44 and a third outlet 45. The first inlet 41 is communicated with the outlet of the anti-condensation pipe 2, the second inlet 42 is communicated with the bypass branch 34, the first outlet 43 is communicated with the first refrigerant branch 31, the second outlet 44 is communicated with the second refrigerant branch 32, and the third outlet 45 is communicated with the third refrigerant branch 33. The first evaporator 13 is arranged in the first refrigerant branch 31, and the third evaporator 17 is arranged in the third refrigerant branch 33, so that the first evaporator 13, the second evaporator 14 and the third evaporator 17 are arranged in the refrigeration cycle loop 3 in a series-parallel manner. The first evaporator 13 is used for refrigerating the refrigerated compartment, the second evaporator 14 is used for refrigerating the frozen compartment, and the third evaporator 17 is used for refrigerating the variable temperature compartment 103.

[0044] Under the high-humidity environment working condition, anti-condensation management is required, and the first inlet 41 of the valve body 4 is opened and the second inlet 42 is closed. Under the medium-low humidity environment working condition, when anti-condensation management is not required, the first inlet 41 of the valve body 4 is closed and the second inlet 42 is opened, so as to reduce heat loss and improve the energy efficiency of the product.

[0045] When the temperatures of the refrigerated compartment 101, the frozen compartment 102 and the variable temperature compartment 103 are greater than their respective preset temperatures, the valve body 4 conducts the corresponding first outlet 43, second outlet 44 and third outlet 45. At this time, the refrigeration system is in the pressure relief process, and the system pressure gradually balances. The refrigerated compartment 101, the frozen compartment 102 and the variable temperature compartment 103 can have refrigeration requests simultaneously, or can have refrigeration requests separately.

[0046] Taking the need for anti-condensation management as an example, when there is a demand for refrigeration in the refrigerated compartment, the first inlet 41 of the valve body 4 is connected to the first outlet 43, and the second inlet 42, the second outlet 44 and the third outlet 45 are closed. The high-temperature and high-pressure gas discharged from the compressor 11 becomes a liquid refrigerant after condensation and heat dissipation through the condenser 12. The inlet of the anti-condensation pipe 2 is connected to the outlet of the condenser 12, and the heat of the mixed refrigerant of the high-temperature liquid refrigerant and the gaseous refrigerant is used to prevent condensation in the anti-condensation pipe 2. Then, after the refrigerant flows through the flow channel connected by the first inlet 41 and the first outlet 43 of the valve body 4, the low-temperature and low-pressure liquid evaporates and absorbs heat in the first evaporator 13, and after taking away the heat of the refrigerated compartment, a part of it becomes a low-temperature and low-pressure gas, and the other part of the low-temperature and low-pressure liquid enters the second evaporator 14 to evaporate and absorb heat, taking away the heat of the freezing compartment to become a low-temperature and low-pressure gas, and then flows back to the compressor 11 to be compressed into a high-temperature and high-pressure gas, completing a refrigeration cycle.

[0047] When only the freezing compartment has a refrigeration demand, the first outlet 43 and the third outlet 45 of the valve body 4 are closed, the second outlet 44 is opened, the first inlet 41 is connected to the second outlet 44, and the high-temperature and high-pressure gas discharged from the compressor 11 is condensed and dissipated by the condenser 12 to become liquid refrigerant. After the anti-condensation pipe 2 is anti-condensed, after flowing through the flow channel connected between the first inlet 41 and the second outlet 44 of the valve body 4, the low-temperature and low-pressure liquid evaporates and absorbs heat in the second evaporator 14, takes away the heat of the freezing compartment and becomes low-temperature and low-pressure gas, and then flows back to the compressor 11 to be compressed into high-temperature and high-pressure gas, completing a refrigeration cycle.

[0048] When only the variable temperature compartment has a cooling demand, the first outlet 43 and the second outlet 44 of the valve body 4 are closed, the third outlet 45 is opened, the first inlet 41 and the third outlet 45 are connected, and the high-temperature and high-pressure gas discharged from the compressor 11 becomes a liquid refrigerant after condensation and heat dissipation through the condenser 12. After the anti-condensation pipe 2 is anti-condensed, after flowing through the flow channel connected between the first inlet 41 and the third outlet 45 of the valve body 4, the low-temperature and low-pressure liquid evaporates and absorbs heat in the third evaporator 17, takes away the heat of the variable temperature compartment, and a part of it becomes a low-temperature and low-pressure gas, and the other part of the low-temperature and low-pressure liquid enters the second evaporator 14 to evaporate and absorb heat, takes away the heat of the freezing compartment and becomes a low-temperature and low-pressure gas, and then flows back to the compressor 11 to be compressed into a high-temperature and high-pressure gas, completing a refrigeration cycle.

[0049] The refrigeration device selects the corresponding rotation speed of the compressor 11 by detecting the number of compartments with refrigeration requests. When the number of compartments requesting refrigeration is three, that is, when the variable-temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 all request refrigeration, the compressor 11 executes the highest third rotation speed R3 to meet the requirements of each compartment, and the fans of the corresponding compartments are turned on. When the number of compartments requesting refrigeration is two, that is, when any two of the variable-temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 request refrigeration, the compressor 11 executes the second rotation speed R2, and the fans of the corresponding compartments are turned on. When the number of compartments requesting refrigeration is one, that is, when any one of the variable-temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 requests refrigeration, the compressor executes the lowest first rotation speed R1.

[0050] In the refrigeration system provided by the embodiment of the present application, the first evaporator 13 for refrigerating the refrigerating compartment 101, the second evaporator 14 for refrigerating the freezing compartment 102, and the third evaporator 17 for refrigerating the variable-temperature compartment 103 are arranged in series and parallel in the refrigeration cycle circuit 3. The anti-condensation tube 2 is arranged in parallel with the bypass branch 34. At the same time, the valve body 4 with two inlets and three outlets is connected to each branch. The valve body 4 can be controlled according to the environmental information of the refrigeration device, and the rotation speed of the compressor can be adjusted according to the number of compartments requesting refrigeration in the freezing compartment, the refrigerating compartment, and the variable-temperature compartment. Since only one valve body can achieve a balance in anti-condensation management and flow distribution, the control logic is simple, which is beneficial to improving the stability of the system operation.

[0051] In some embodiments, the valve body 4 includes a valve seat 46 and a valve block 47 arranged coaxially. The end face of the valve seat 46 is provided with a first inlet 41, a second inlet 42, a first outlet 43, a second outlet 44, and a third outlet 45 that are circumferentially spaced apart. The first inlet 41 and the second inlet 42 are opened on a circle centered on the central axis of the valve seat 46 and with a first length as the radius. The first outlet 43, the second outlet 44, and the third outlet 45 are opened on a circle centered on the central axis of the valve seat 46 and with a second length as the radius, and the first length is greater than the second length.

[0052] The valve block 47 includes a connecting portion 470 and a first notch 471 and a second notch 472 arranged on the connecting portion 470. The connecting portion 470 fits with the end face of the valve seat 46 and can rotate relative to the valve seat 46 so that the first notch 471 can selectively communicate with any one of the first inlet 41 and the second inlet 42, and the second notch 472 can selectively communicate with any one of the first outlet 43, the second outlet 44, and the third outlet 45.

[0053] Figure 2 For Figure 1 The exploded structural schematic diagram of the valve body in the shown refrigeration system.

[0054] Refer to Figure 2 , the end face of the valve seat 46 is a flat mating surface, and the valve block 47 can be attached to the end face of the valve seat 46 and perform a rotational movement at a certain angle. The valve body 4 further includes a first inlet pipe, a second inlet pipe, a first outlet pipe, a second outlet pipe, and a third outlet pipe fixedly connected to the valve seat 46. The first inlet pipe communicates with the first inlet 41, the second inlet pipe communicates with the second inlet 42, the first outlet pipe communicates with the first outlet 43, the second outlet pipe communicates with the second outlet 44, and the third outlet pipe communicates with the third outlet 45. The first inlet pipe, the second inlet pipe, the first outlet pipe, the second outlet pipe, and the third outlet pipe are respectively connected to the refrigeration cycle circuit 3 to meet the requirements of the refrigeration system 10.

[0055] The valve body 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 valve block 47 to rotate relative to the valve seat 46. The connecting portion 470 of the valve block 47 is used for rotational mating with the end face of the valve seat 46. When the first notch 471 of the connecting portion 470 rotates to correspond to the first inlet 41, the first inlet 41 is in a conducting state. When the first notch 471 of the connecting portion 470 rotates to correspond to the second inlet 42, the second inlet 42 is in a conducting state. When the first inlet 41 or the second inlet 42 is in a conducting state, if the second notch 472 corresponds to any one of the first outlet 43, the second outlet 44, and the third outlet 45, the corresponding flow path can be conducted. For example, the first inlet 41 is conducted with any one of the first outlet 43, the second outlet 44, and the third outlet 45, or the second inlet 42 is conducted with any one of the first outlet 43, the second outlet 44, and the third outlet 45. When the connecting portion rotates to a position where the remaining parts except the second notch 472 cover the first outlet 43, the second outlet 44, and the third outlet 45, the first outlet 43, the second outlet 44, and the third outlet 45 are respectively in a closed state.

[0056] It can be understood that the valve body 4 may have other structural forms as long as it can achieve the on-off function of two inlets and three outlets, and no limitation is made here.

[0057] In some embodiments, the refrigeration assembly 1 further includes a first throttling element 15 and / or a second throttling element 16 and / or a third throttling element 18. 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. The third throttling element 18 is disposed in the third refrigerant branch 33 and communicates with the inlet of the third evaporator 17. The first throttling element 15, the second throttling element 16, and the third throttling element 18 may be, for example but not limited to, capillary tubes.

[0058] The first throttling element 15, the second throttling element 16, and the third throttling element 18 can be simultaneously arranged in the refrigeration cycle loop 3, or can be individually or any two of them arranged in the refrigeration cycle loop 3. The high-temperature and high-pressure gas discharged from the compressor 11 becomes a liquid refrigerant after being condensed and cooled by the condenser 12. After preventing condensation on the anti-condensation pipe 2, it flows through the flow path where the first inlet 41 and the second outlet 44 of the valve body 4 are conducted. The first throttling element 15, the second throttling element 16, and the third throttling element 18 can respectively impede, limit the flow, and reduce the pressure of the high-temperature and high-pressure liquid refrigerant to become a low-temperature and low-pressure liquid, improving the heat exchange efficiency of the condenser 12.

[0059] In some embodiments, the refrigeration system 10 further includes a filtering device 5. The inlet of the filtering device 5 is communicated with the condenser 12. The first output end of the filtering device 5 is communicated with the inlet of the anti-condensation pipe 2, and the second output end of the filtering device 5 is communicated with the bypass branch 34.

[0060] The filtering device 5 is arranged in the main pipeline 30 and is located between the condenser 12 and the anti-condensation pipe 2. The filtering device 5 is used to filter impurities, dust, etc. in the refrigerant to prevent impurities and dust from entering the anti-condensation pipe 2 or the bypass branch 34.

[0061] Figure 3 It is a schematic structural diagram of a refrigeration system according to another embodiment of the present application.

[0062] Refer to Figure 3 In the refrigeration system 10 in the embodiment of the present application, it is similar in structure to the refrigeration system 10 shown in Figure 1 However, the difference is that the first evaporator 13, the second evaporator 14, and the third evaporator 17 are arranged in parallel.

[0063] In this embodiment, under the working condition of a high-humidity environment, anti-condensation management is required, and the first inlet 41 of the valve body 4 is opened and the second inlet 42 is closed. Under the working condition of a medium-low humidity environment, when anti-condensation management is not required, the first inlet 41 of the valve body 4 is closed and the second inlet 42 is opened, reducing heat loss and improving the energy efficiency of the product.

[0064] When the temperatures of the refrigerated compartment 101, the frozen compartment 102, and the variable-temperature compartment 103 are greater than their respective preset temperatures, the valve body 4 conducts the corresponding first outlet 43, second outlet 44, and third outlet 45. At this time, the refrigeration system is in a pressure relief process, and the system pressure gradually balances. The refrigerated compartment 101, the frozen compartment 102, and the variable-temperature compartment 103 can have refrigeration requests simultaneously, or can have refrigeration requests individually.

[0065] The refrigeration device detects the number of compartments with refrigeration requests and selects corresponding compressor speeds respectively. When the number of compartments requesting refrigeration is three, that is, when the variable-temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 all request refrigeration, the compressor 11 operates at the highest third speed R3 to meet the requirements of each compartment, and the fans of the corresponding compartments are turned on. When the number of compartments requesting refrigeration is two, that is, when any two of the variable-temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 request refrigeration, the compressor 11 operates at the second speed R2, and the fans of the corresponding compartments are turned on. When the number of compartments requesting refrigeration is one, that is, when any one of the variable-temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 requests refrigeration, the compressor operates at the lowest first speed R1.

[0066] During refrigeration, the temperatures of each compartment are repeatedly detected until the temperatures of all compartments of the refrigeration device reach the preset temperatures, then the refrigeration mode is exited and the compressor 11 stops. At this time, the first outlet 43, the second outlet 44, and the third outlet 45 of the valve body are all in the closed and pressure-maintaining state.

[0067] Figure 4 It is a schematic structural diagram of a refrigeration device according to an embodiment of the present application.

[0068] Refer to Figure 4 , an embodiment of the present application provides a refrigeration device, including: a box body, a refrigeration system 10 of each embodiment of the present application, a sensor assembly, and a controller.

[0069] A freezing compartment 102, a refrigerating compartment 101, and a variable-temperature compartment 103 are arranged in the box body. The first evaporator 13 of the refrigeration system 10 is arranged in the refrigerating compartment 101, the second evaporator 14 is arranged in the freezing compartment 102, and the third evaporator 17 is arranged in the variable-temperature compartment 103.

[0070] The sensor assembly is used to detect the environmental information of the refrigeration device. The controller is electrically connected to the sensor assembly, the compressor 11 of the refrigeration system, and the valve body 4 respectively. The controller is configured to control the conduction and closing of the valve body 4 of the refrigeration system according to the environmental information, and adjust the speed of the compressor 11 according to the number of compartments requesting refrigeration.

[0071] In some embodiments, the refrigeration device further includes a first fan, a second fan, and a third fan. The first fan is arranged in the refrigerating compartment 101, the second fan is arranged in the freezing compartment 102, and the third fan is arranged in the variable-temperature compartment 103. When the number of compartments requesting refrigeration is two or three, the fans of the corresponding compartments are turned on for the first fan, the second fan, and the third fan.

[0072] In some embodiments, the sensor assembly includes a first sensor, a second sensor, a third sensor, and an ambient temperature and humidity sensor. The first sensor is used to detect the temperature of the refrigerated compartment 101, the second sensor is used to detect the temperature of the freezer compartment 102, the third sensor is used to detect the temperature of the variable temperature compartment 103, and the ambient temperature and humidity sensor is used to detect the ambient temperature and the ambient relative humidity.

[0073] The environmental information of the refrigeration equipment includes the temperature of the refrigerating compartment 101, the temperature of the freezing compartment 102, the temperature of the variable temperature compartment 103, the ambient temperature and the ambient relative humidity. The controller determines that anti-condensation management is required based on the ambient temperature being greater than the ambient temperature threshold, or the ambient relative humidity being greater than the humidity threshold, determines that the refrigerating compartment 101 has a refrigeration demand based on the temperature of the refrigerating compartment 101 being greater than the first temperature threshold, determines that the freezing compartment 102 has a refrigeration demand based on the temperature of the freezing compartment 102 being greater than the second temperature threshold, and determines that the variable temperature compartment 103 has a refrigeration demand based on the temperature of the variable temperature compartment 103 being greater than the third temperature threshold.

[0074] In some embodiments, a middle beam is provided between the refrigerating compartment 101 and the variable temperature compartment and between the variable temperature compartment 103 and the freezing compartment 102, respectively, and the anti-condensation pipe 2 of the refrigeration system is provided on one side of the freezing compartment 102, the variable temperature compartment 103 and the refrigerating compartment 101, and is provided close to the middle beam. The anti-condensation pipe 2 is provided in this way to prevent condensation on the inner wall, frame, beam, etc. of the refrigerating equipment adjacent to the variable temperature compartment 103, the refrigerating compartment 101 and the freezing compartment 102.

[0075] In some embodiments, the anti-condensation pipe 2 includes a plurality of sub-tubes corresponding to the freezing compartment 102, the variable temperature compartment 103 and the refrigerating compartment 101 respectively, the plurality of sub-tubes are connected end to end, and a bent pipe is connected between each two adjacent sub-tubes; the center beam is provided with a snap-fitting piece, which is snap-fitted to the corresponding sub-tube.

[0076] When assembling the refrigeration equipment 100, the anti-condensation pipe 2 is fixed to the front frame of the box body. A bent pipe is provided between each two adjacent sub-pipes, and the bent pipe is opened to increase the distance between the two adjacent compartments. In this way, the center beam can be smoothly installed between the two adjacent compartments. After the installation is completed, the bent pipe is restored to its original state.

[0077] Figure 5 The figure is a schematic diagram of the operation flow of a refrigeration device according to an embodiment of the present application.

[0078] See also Figure 5, the operation process of the refrigeration device is as follows: After the refrigeration device is powered on and detects a refrigeration request, it will first detect the relative humidity of the environment. According to the relative humidity of the environment being higher than the humidity threshold Th, the control valve body 4 is controlled to conduct the first inlet 41 for anti-condensation treatment. According to the relative humidity of the environment being less than or equal to the humidity threshold Th, the control valve body 4 is controlled to conduct the second inlet 42. Then, the temperatures of the variable temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 are detected in sequence, and compared with their respective preset temperatures T1, T2, and T3 respectively. When the detected temperature is greater than the preset temperature, the corresponding third outlet 45, the first outlet 43, and the second outlet 44 are conducted. At this time, the system is in a pressure relief process, the system pressure gradually balances, and the refrigerant on one side of each evaporator undergoes pressure change and vaporization to cool down, achieving the refrigeration effect.

[0079] After the pressure relief lasts for a period of time t, the refrigeration device selects the corresponding rotation speed of the compressor 11 by detecting the number of compartments with refrigeration requests. When the number of compartments with refrigeration requests is three, that is, when the variable temperature compartment 103, the refrigerating compartment 101, and the freezing compartment 102 all request refrigeration, the compressor 11 executes the highest third rotation speed R3 to meet the refrigeration requirements of each compartment, and the corresponding fans of each compartment are turned on. When the number of compartments with refrigeration requests is two, the compressor 11 executes the second rotation speed R2, and the corresponding fans of the compartments are turned on. When the number of compartments with refrigeration requests is one, the compressor executes the lowest first rotation speed R1. The third rotation speed R3, the second rotation speed R2, and the first rotation speed R1 respectively correspond to different gears of the compressor 11, and the control logic is simple and reliable.

[0080] During refrigeration, the temperatures of each compartment are repeatedly detected until the temperatures of all compartments of the refrigeration device reach the preset temperatures, and the refrigeration mode is exited and the compressor stops. At this time, the valve body 4 is in a closed state to maintain pressure.

[0081] In addition, when the valve body 4 and the compressor 11 are started simultaneously, there is a pressure difference in the system pipeline and the exhaust pressure of the compressor 11 is relatively large, which will impact the valve body 4, thereby reducing the service life of the valve body 4. For this reason, in this embodiment, the valve body 4 is opened in advance before the compressor 11 runs, and the first outlet 43, the second outlet 44, and the third outlet 45 of the valve body 4 are all in a fully open state, which can balance the system pressure and avoid damage due to excessive pressure at the moment of startup. After the compressor 11 is in a shutdown state, the valve body 4 is then closed to cut off the flow direction of the refrigerant, maintaining the pressure difference between the condenser 12 and the first evaporator 13, the second evaporator 14, and the third evaporator 17, and avoiding the high-temperature refrigerant in the condenser 12 from vaporizing and absorbing heat from the outside due to pressure reduction, thereby reducing the system energy loss and further achieving an energy-saving effect.

[0082] It can be understood that the refrigeration device 100 provided in the embodiment of the present application can be various refrigeration devices such as refrigeration devices, freezers, cold storages, refrigerated and frozen trucks, etc.

[0083] According to the refrigeration device 100 in the embodiments of the present application, by arranging the first evaporator 13 for refrigerating the refrigerated compartment 101, the second evaporator 14 for refrigerating the frozen compartment 102, and the third evaporator 17 for refrigerating the variable-temperature compartment 103 in a series-parallel or parallel manner in the refrigeration cycle circuit 3, arranging the anti-condensation tube 2 in parallel with the bypass branch 34, and at the same time using the valve body 4 with two inlets and three outlets to communicate with each branch, the valve body 4 can be controlled according to the environmental information of the refrigeration device, and the rotational speed of the compressor 11 can be adjusted according to the number of compartments requesting refrigeration in the frozen compartment 102, the refrigerated compartment 101, and the variable-temperature compartment 103. Since only one valve body 4 can achieve a balance in anti-condensation management and flow distribution, the control logic is simple, which is beneficial to improving the stability of system operation.

[0084] 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 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: Anti-condensation tube; Refrigeration assembly, including a compressor, a condenser, a first evaporator, a second evaporator, and a third evaporator; Refrigeration cycle circuit, including a main pipeline and a first refrigerant branch, a second refrigerant branch, a third refrigerant branch, and a bypass branch respectively communicating with the main pipeline. The first refrigerant branch, the second refrigerant branch, and the third refrigerant branch are arranged in parallel. The first evaporator is arranged in the first refrigerant branch, the third evaporator is arranged in the third refrigerant branch. The outlets of the first evaporator, the second refrigerant branch, and the third evaporator are all communicated with the inlet of the second evaporator. The second evaporator, the compressor, the condenser, and the anti-condensation tube are sequentially arranged in the main pipeline. The bypass branch is arranged in parallel with the anti-condensation tube; and Valve body, arranged at the connection of the first refrigerant branch, the second refrigerant branch, the third refrigerant branch and the main pipeline. The valve body has a first inlet, a second inlet, a first outlet, a second outlet and a third outlet. The first inlet is communicated with the outlet of the anti-condensation tube, the second inlet is communicated with the bypass branch, the first outlet is communicated with the first refrigerant branch, the second outlet is communicated with the second refrigerant branch, and the third outlet is communicated with the third refrigerant branch. Wherein, the first inlet can be selectively conducted with any one of the first outlet, the second outlet and the third outlet, or the second inlet can be selectively conducted with any one of the first outlet, the second outlet and the third outlet.

2. The refrigeration system according to claim 1, wherein The valve body includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with the first inlet, the second inlet, the first outlet, the second outlet and the third outlet distributed at intervals along the circumferential direction. The first inlet and the second inlet are opened on a circumference centered on the central axis of the valve seat and with a first length as the radius. The first outlet, the second outlet and the third outlet are opened on a circumference centered on the central axis of the valve seat and with a second length as the radius, and the first length is greater than the second length; The valve block includes a connecting portion and a first notch and a second notch arranged on the connecting portion. The connecting portion fits with the end face of the valve seat and can rotate relative to the valve seat so that the first notch can be selectively communicated with any one of the first inlet and the second inlet, and the second notch can be selectively communicated with any one of the first outlet, the second outlet and the third outlet.

3. 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 and / or a third throttling element. The first throttling element is arranged in the first refrigerant branch and communicated with the inlet of the first evaporator. The second throttling element is arranged in the second refrigerant branch. The third throttling element is arranged in the third refrigerant branch and communicated with the inlet of the third evaporator.

4. A refrigeration system, characterized in that, Comprising: Anti-condensation tube; Refrigeration assembly, including a compressor, a condenser, a first evaporator, a second evaporator, and a third evaporator; A refrigeration cycle circuit includes a main pipeline and a first refrigerant branch, a second refrigerant branch, a third refrigerant branch, and a bypass branch that are respectively connected to the main pipeline. The first refrigerant branch, the second refrigerant branch, and the third refrigerant branch are arranged in parallel. The first evaporator is arranged in the first refrigerant branch, the second evaporator is arranged in the second refrigerant branch, the third evaporator is arranged in the third refrigerant branch. The outlets of the first evaporator, the second evaporator, and the third evaporator are all connected to the inlet of the compressor. The compressor, the condenser, and the anti-condensation pipe are sequentially arranged in the main pipeline. The bypass branch is arranged in parallel with the anti-condensation pipe; and a valve body is arranged at the connection of the first refrigerant branch, the second refrigerant branch, the third refrigerant branch and the main pipeline. The valve body has a first inlet, a second inlet, a first outlet, a second outlet and a third outlet. The first inlet is connected to the outlet of the anti-condensation pipe, the second inlet is connected to the bypass branch, the first outlet is connected to the first refrigerant branch, the second outlet is connected to the second refrigerant branch, and the third outlet is connected to the third refrigerant branch. Wherein, the first inlet and the second inlet are selectively conducted or disconnected from any one of the first outlet, the second outlet and the third outlet respectively.

5. The refrigeration system according to claim 4, characterized in that, The valve body includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with the first inlet, the second inlet, the first outlet, the second outlet and the third outlet that are circumferentially spaced apart. The first inlet and the second inlet are opened on a circumference with the central axis of the valve seat as the center and a first length as the radius. The first outlet, the second outlet and the third outlet are opened on a circumference with the central axis of the valve seat as the center and a second length as the radius, and the first length is greater than the second length; The valve block includes a connecting portion and a first notch and a second notch arranged on the connecting portion. The connecting portion fits 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 any one of the first inlet and the second inlet, and the second notch can selectively communicate with any one of the first outlet, the second outlet and the third outlet.

6. The refrigeration system according to claim 4, characterized in that, The refrigeration assembly further includes a first throttling element and / or a second throttling element and / or a third throttling element. The first throttling element is arranged in the first refrigerant branch and is connected to the inlet of the first evaporator. The second throttling element is arranged in the second refrigerant branch and is connected to the inlet of the second evaporator. The third throttling element is arranged in the third refrigerant branch and is connected to the inlet of the third evaporator.

7. A refrigeration device, characterized in that, Comprising: a box body, in which a freezing compartment, a refrigerating compartment and a variable-temperature compartment are arranged; The refrigeration system according to any one of claims 1-6, wherein a first evaporator of the refrigeration system is arranged in the fresh-keeping compartment, a second evaporator is arranged in the freezing compartment, and a third evaporator is arranged in the variable-temperature compartment; A sensor assembly for detecting the environmental information of the refrigeration equipment; And A controller is electrically connected to the sensor assembly, the compressor and the valve body of the refrigeration system respectively. The controller is configured to control the opening and closing of the valve body of the refrigeration system according to the environmental information, and adjust the rotational speed of the compressor according to the number of compartments requesting refrigeration.

8. The refrigeration device according to claim 7, characterized in that, The refrigeration equipment further includes a first fan, a second fan and a third fan. The first fan is arranged in the fresh-keeping compartment, the second fan is arranged in the freezing compartment, and the third fan is arranged in the variable-temperature compartment.

9. The refrigeration device according to claim 7, characterized in that, The sensor assembly includes a first sensor, a second sensor, a third sensor and an environmental temperature and humidity sensor. The first sensor is used for detecting the temperature of the fresh-keeping compartment, the second sensor is used for detecting the temperature of the freezing compartment, the third sensor is used for detecting the temperature of the variable-temperature compartment, and the environmental temperature and humidity sensor is used for detecting the environmental temperature and the environmental relative humidity.

10. The refrigeration device according to claim 7, characterized in that, Intermediate beams are respectively arranged between the fresh-keeping compartment and the variable-temperature compartment and between the variable-temperature compartment and the freezing compartment. The anti-condensation pipe of the refrigeration system is arranged on one side of the freezing compartment, the variable-temperature compartment and the fresh-keeping compartment and is arranged close to the intermediate beam.

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