Plate and tube throttling evaporation assembly and refrigeration and freezing device

Abstract

The present application relates to cold technology field, particularly to a kind of plate tube throttling evaporation assembly and refrigeration device.The plate tube throttling evaporation assembly includes evaporation module and throttling module.Evaporation module includes evaporation plate and the evaporation tube fixed on it;Throttling module is relatively independently arranged outside evaporation module and is connected with the inlet end of evaporation tube.In the plate tube throttling evaporation assembly of the present application, throttling module and evaporation module are split structure, throttling module is relatively independently arranged outside evaporation module, not only can reduce vibration and noise, but also can increase the pipeline length of evaporation tube on evaporation plate, so as to increase heat exchange capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration, in particular to a plate-tube throttling evaporation assembly and a refrigeration and freezing device. BACKGROUND

[0002] The noise of a refrigerator is an important indicator of the performance of the refrigerator. At the connection between the capillary tube and the evaporation module, due to the sudden and sharp increase in the inner diameter of the pipeline, the pressure suddenly changes, and the high-speed ejection of the refrigerant from the capillary tube causes phase change and generates a large number of bubbles. As the pressure continues to decrease, these bubbles increase until they burst, thereby producing a spouting noise. These spouting noises increase the overall noise of the refrigerator, and the user experience is extremely poor. Especially for a plate-tube evaporation module, which adopts an integrated structure in which the evaporation module body and the capillary tube are integrated on the evaporation plate and the refrigerant enters and exits from the same side of the evaporation plate, the spouting noise can be transmitted to a larger range through the evaporation plate, making the user experience even worse. SUMMARY

[0003] In view of the above problems, the present application is proposed in order to provide a plate-tube throttling evaporation assembly and a refrigeration and freezing device that overcome the above problems or at least partially solve the above problems, aiming to solve the problem of excessive spouting noise of the plate-tube evaporation module in the prior art and achieve the purpose of improving the user experience.

[0004] In one aspect, the present application provides a plate-tube throttling evaporation assembly, comprising:

[0005] an evaporation module, the evaporation module comprising an evaporation plate and an evaporation tube fixedly arranged on the evaporation plate;

[0006] a throttling module, the throttling module being arranged outside the evaporation module and connected to an inlet end of the evaporation tube.

[0007] Optionally, the inlet end and the outlet end of the evaporation tube are located on different sides of the evaporation plate; and

[0008] an outlet section of the throttling module is located between the inlet end and the outlet end and is arranged around the periphery of the evaporation plate.

[0009] Optionally, the throttling module comprises a first throttling module, the first throttling module comprising a capillary tube and an expansion tube arranged in series, the inner passage cross-sectional area of the expansion tube being larger than the inner passage cross-sectional area of the capillary tube, and the outlet of the expansion tube being connected to the inlet of the evaporation tube.

[0010] Optionally, the number of the expansion tubes in the first throttling module is more than two, one of the expansion tubes is connected in series between the capillary tube and the evaporation module and constitutes a last expansion tube, and the outlet of the last expansion tube is connected with the inlet of the evaporation tube; the rest of the expansion tubes are connected in series in the capillary tube to divide the capillary tube into at least two capillary tube sections, and constitute intermediate expansion tubes.

[0011] Optionally, the pipe lengths of the at least two expansion tubes are different and / or the cross-sectional areas of the channels in the pipes are different; and / or

[0012] The pipe lengths of the at least two capillary tube sections are different and / or the cross-sectional areas of the channels in the pipes are different.

[0013] Optionally, the pipe length of each of the capillary tube sections is greater than the pipe length of any of the expansion tubes.

[0014] The capillary tube section located at the first section of each of the capillary tube sections is close to the inlet of the first throttling module, the capillary tube section located at the last section is close to the outlet of the throttling module, and

[0015] The capillary tube section located at the second section of each of the capillary tube sections has the longest pipe length.

[0016] Optionally, the throttling module comprises at least two first throttling modules arranged in parallel, and the number and / or structure of the expansion tubes in at least two of the first throttling modules are different.

[0017] Optionally, the throttling module further comprises a second throttling module, the second throttling module comprises a capillary tube, the second throttling module is connected with the evaporation module, and the second throttling module is arranged in parallel with the first throttling module.

[0018] In another aspect, the application further provides a refrigeration and freezing device, comprising:

[0019] a storage space configured as a controlled closed space, the storage space comprising an inner container;

[0020] The plate-tube throttling evaporation assembly according to any one of the preceding claims, wherein the evaporation module of the plate-tube throttling evaporation assembly is connected with the outer wall of the inner container.

[0021] Optionally, the refrigeration and freezing device further comprises:

[0022] an electric heater, wherein the heating part of the electric heater is in thermal conductive connection with the expansion tube through a thermal conductive member;

[0023] a controller, wherein the controller is electrically connected with the electric heater, and the controller is configured to start the electric heater to heat the expansion tube when the expansion tube reaches a defrosting condition.

[0024] In the plate-tube throttling evaporation assembly, the throttling module and the evaporation module are in a split structure, and the throttling module is arranged outside the evaporation module independently, which can not only reduce the evaporation noise, but also increase the length of the evaporation pipe on the evaporation plate, thereby increasing the heat exchange capacity.

[0025] Further, the capillary tube is connected with the evaporation pipe through an expansion pipe, and the expansion pipe has a pressure reduction function, which can reduce or weaken the evaporation capacity and reduce the evaporation noise.

[0026] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, when considered with the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] Some specific embodiments of the present application will be described in detail below with reference to the attached drawings. The same reference numbers in different drawings denote the same or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0028] Figure 1 is a schematic structural diagram of a plate-tube throttling evaporation assembly according to an embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of a plate-tube throttling evaporation assembly according to an embodiment of the present application;

[0030] Figure 3 is a schematic structural diagram of a first throttling module according to an embodiment of the present application;

[0031] Figure 4 is a schematic structural diagram of a first throttling module according to an embodiment of the present application;

[0032] Figure 5 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application;

[0033] Figure 6 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application;

[0034] Figure 7 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, when considered with the attached drawings. Figures 1 to 7This invention describes a plate-tube throttling evaporator assembly and a refrigeration and freezing apparatus according to embodiments of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0036] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Figure 1 This is a schematic structural diagram of a throttling module according to an embodiment of the present invention, such as...Figure 1 As shown, and with reference Figures 2-7 This invention provides a plate-tube throttling evaporation assembly, which includes an evaporation module 40 and a throttling module 30.

[0040] The evaporation module 40 includes an evaporation plate 41 and an evaporation tube 42 fixed to the surface of the evaporation plate 41. The throttling module 30 is disposed relatively independently outside the evaporation module 40 and connected to the inlet end of the evaporation tube 40. That is, the throttling module 30 and the evaporation module 40 are separate structures, with the throttling module 30 located outside the evaporation plate 41.

[0041] In this embodiment, the plate-tube throttling evaporator assembly operates by having the refrigerant enter the throttling module 30 from the condenser 20, and then enter the evaporator module 40. The refrigerant ejection noise does not cause noise or vibration in the evaporator module 40.

[0042] In this embodiment, the throttling module 30 and the evaporation module 40 are separate structures. The throttling module is set relatively independently outside the evaporation module 40, which can not only reduce the spray noise, but also increase the pipe length of the evaporation tube 42 on the evaporation plate 41, thereby increasing the heat exchange.

[0043] like Figure 1 and 2 As shown, in some optional embodiments of the present invention, the inlet end and outlet end of the evaporator tube 42 are located on different sides of the evaporator plate 41; and the outlet section of the throttling module 30 is located between the inlet end and the outlet end of the evaporator tube 42 and is arranged around the periphery of the evaporator plate 41.

[0044] Furthermore, the evaporator tube 42 includes a serpentine tube 421 and an inlet tube 422 arranged in series. The serpentine tube 421 is located on the surface of the evaporator plate 41, and the inlet tube 422 is vertically arranged and located on the left or right side of the evaporator plate 41. In this embodiment, the inlet tube 422 and the throttling module 30 are located outside the evaporator plate 41, which can increase the pipe length of the serpentine tube 421 on the evaporator plate, thereby increasing the heat exchange.

[0045] Furthermore, the serpentine tube 421 includes multiple horizontally arranged straight tubes and bends located at both ends of the straight tubes, with the multiple straight tubes spaced apart in the vertical direction. The inlet tube 422 is located on the right side of the evaporator plate 41, and the inlet of the inlet tube 422 is located at the middle position in the vertical direction of the evaporator plate 41.

[0046] Furthermore, the outlet section of the throttling module 30 includes a vertical section 311 and a horizontal section 312. The vertical section 311 is connected to the inlet pipe 422, and the horizontal section 312 is located at the lower end of the vertical section 311 and below the serpentine pipe 421. More preferably, the horizontal section 312 is located below the evaporator plate 41.

[0047] In some optional embodiments of the present invention, the throttling module 30 includes a first throttling module 31, which includes a capillary tube 301 and an expansion tube 302 arranged in series. The cross-sectional area of ​​the inner channel of the expansion tube 302 is larger than that of the capillary tube. The capillary tube 301 is connected to the inlet of the evaporator tube through the expansion tube 302. The outlet of the expansion tube 302 is connected to the inlet of the evaporator tube 42. Specifically, the outlet of the expansion tube 302 is connected to the inlet of the inlet tube 422.

[0048] In this embodiment, the plate-tube throttling evaporator assembly is used such that the refrigerant enters from the condenser 20, passes through the capillary tube 301 and the expansion tube 302, and finally enters the evaporation module 40.

[0049] In the plate-tube throttling evaporation assembly of the present invention, since the cross-sectional area of ​​the inner channel of the expansion tube is larger than that of the inner channel of the capillary tube, the expansion tube has the function of reducing pressure, which can reduce or weaken the ejection capacity and reduce the ejection noise.

[0050] In some optional embodiments of the present invention, the number of expansion tubes 302 in the first throttling module 31 is two or more (e.g., 2, 3, 4, 5, 6, or 8). One expansion tube 302 is connected in series between the capillary tube 301 and the evaporation module 40 to form the final expansion tube, and the outlet of the final expansion tube is connected to the inlet of the evaporation tube 42. The remaining expansion tubes 302 are connected in series in the capillary tube 301 to divide the capillary tube 301 into at least two capillary segments and form intermediate expansion tubes. That is, the first throttling module 31 includes multiple capillary segments and multiple expansion tubes 302, which are alternately distributed along the length of the first throttling module. In some alternative embodiments, the number of expansion tubes 302 in the first throttling module 31 is one, and this expansion tube 302 is the final expansion tube.

[0051] In this embodiment, the inclusion of multiple capillary segments and multiple expansion tubes 302 allows for multi-stage step-down pressure reduction, decreasing or weakening the ejection force and reducing ejection noise. Furthermore, the noise reduction effect is good, and the noise reduction frequency range is wide. Therefore, this invention can achieve broadband noise reduction, thereby improving the user experience.

[0052] like Figure 4As shown, in some optional embodiments of the present invention, the first throttling module 31 includes two capillary segments and two expansion tubes 302, the two capillary segments forming a two-stage capillary. This first throttling module can achieve two-stage step noise reduction, with a noise reduction frequency of 400-2000Hz and a noise reduction amount of 1-3dB(A), where Hz refers to Hertz and dB(A) refers to Decibels. When the first throttling module includes one capillary segment and one expansion tube 302, the noise reduction frequency of the throttling module is 500-1500Hz; thus, this embodiment can significantly increase the range of the frequency reduction and improve the range of the noise reduction amount.

[0053] like Figure 3 As shown, in some optional embodiments of the present invention, the throttling module includes three capillary segments and three expansion tubes 302, which together form a three-segment capillary. This throttling module can achieve three-stage noise reduction, with a noise reduction frequency of 300-2500Hz and a noise reduction amount of 1-3.5dB(A), where Hz refers to Hertz and dB(A) refers to Decibels. It can be seen that the number of capillary segments in the throttling module is directly proportional to both the range of noise reduction frequency and the range of noise reduction amount.

[0054] In some optional embodiments of the present invention, the number of expansion tubes 302 in the first throttling module is two or more, and at least two of the expansion tubes 302 have different pipe lengths and / or different cross-sectional areas of the pipe channels. Through the above arrangement, the noise reduction frequency range and noise reduction amount range of the first throttling module 31 can be further increased.

[0055] In some optional embodiments of the present invention, the number of expansion tubes 302 in the first throttling module 31 is two or more, and the capillary is a multi-segment capillary, with the capillary 301 comprising at least two capillary segments; the at least two capillary segments have different pipe lengths and / or different cross-sectional areas of the channels within the pipes. Through the above configuration, the noise reduction frequency range and noise reduction amount range of the first throttling module can be further increased.

[0056] In some optional embodiments of the present invention, the number of expansion tubes 302 in the first throttling module 31 is two or more, and the capillary tube 301 is a multi-segment capillary tube, which includes at least two capillary tube segments. The capillary tube segments and expansion tubes 302 are alternately distributed along the length direction of the throttling module, and the pipe length of each capillary tube segment is greater than the pipe length of any expansion tube.

[0057] In this embodiment, since the pipe length of each capillary segment is greater than the pipe length of any expansion tube, the present invention can balance the needs of throttling and noise reduction, and can meet the needs of throttling while meeting the needs of noise reduction.

[0058] like Figures 3-4As shown, in some optional embodiments of the present invention, the capillary segment in the first segment is close to the inlet of the first throttling module 31, the capillary segment in the last segment is close to the outlet of the first throttling module 31, and the capillary segment in the second segment has the longest pipe length.

[0059] During use, the refrigerant passes sequentially through the first capillary tube section, the first expansion tube, the second capillary tube section, the second expansion tube, ... the Nth capillary tube section and the Nth expansion tube.

[0060] In this embodiment, the second capillary section has the longest pipe length, which can reduce high-frequency noise.

[0061] like Figures 3-4 As shown, in some optional embodiments of the present invention, the length of each capillary segment is no more than 5 times the length of any expansion tube.

[0062] Specifically, the noise reduction of the first throttling module 31 is directly proportional to the length of the capillary section, but the length of the capillary section cannot be infinitely long, and the extreme value is 5 times the length of the expansion tube 302.

[0063] like Figure 4 As shown, in some optional embodiments of the present invention, the expansion tube 302 is wrapped with a sound-absorbing material 304.

[0064] Specifically, the sound-absorbing material 304 is formed into a flexible roll, which is wrapped around the expansion tube 302 to form a sleeve-shaped sound-absorbing package. The sound-absorbing material 304 is a low-frequency sound-absorbing material or a high-frequency sound-absorbing material. For example, the sound-absorbing material 304 is sound-absorbing cotton or sound-insulating felt.

[0065] In this embodiment, by using sound-absorbing materials, the noise from refrigerant flow and ejection can be further reduced.

[0066] like Figure 5 As shown, in some optional embodiments of the present invention, the first throttling module 301 constitutes the throttling module 30.

[0067] In this embodiment, during use, the refrigerant flows out from the compressor 10, passes sequentially through the condenser 20, the first throttling module 31, and the evaporator module 40, and finally returns to the compressor 10. The compressor 10, condenser 20, first throttling module 31, and evaporator module 40 constitute the refrigeration system.

[0068] like Figure 6As shown, in some optional embodiments of the present invention, the throttling module includes at least two first throttling modules 31 arranged in parallel. With the above arrangement, under the same refrigerant pressure conditions, the refrigeration system of the present invention can still have lower noise; on the other hand, under the premise of the same output noise, the present invention can increase the upper limit of the applicable refrigerant pressure and the upper limit of the compressor speed used in the refrigeration system.

[0069] More preferably, at least two of the first throttling modules 31 have different numbers and / or structures of expansion tubes 302. The structure of the expansion tube 302 includes the pipe length and / or the cross-sectional area of ​​the internal channel. That is, at least two of the first throttling modules 31 have different noise reduction amounts.

[0070] In this embodiment, during refrigeration, one or more first throttling modules can be selected based on the refrigerant pressure of the refrigeration system, the compressor speed, and the noise reduction of each first throttling module, thereby better balancing noise and throttling.

[0071] like Figure 7 As shown, in some optional embodiments of the present invention, the throttling module 30 further includes a second throttling module 32, which includes a capillary tube. The second throttling module 32 is connected to the evaporation module 40 and is arranged in parallel with the first throttling module 31. Specifically, the second throttling module 32 does not include an expansion tube. The outlet of the capillary tube is connected to the inlet of the evaporation tube 42.

[0072] In this embodiment, during refrigeration, when both the refrigerant pressure and the compressor speed of the refrigeration system are less than their respective preset values, the second throttling module 32 is activated and the first throttling module 31 is deactivated; when the refrigerant pressure and / or the compressor speed of the refrigeration system are not less than their respective preset values, the first throttling module 31 is activated and the second throttling module 32 is deactivated. This setting can better balance throttling and noise reduction.

[0073] In some alternative embodiments of the present invention, the throttling module 30 includes a second throttling module but does not include a first throttling module. The second throttling module is a capillary tube, and the outlet of the capillary tube is connected to the inlet of the evaporator tube 42.

[0074] This invention also provides a refrigeration and freezing device, which includes a storage space and a plate-tube throttling evaporator assembly as described in any of the above embodiments. The storage space is configured as a sealed space with controlled opening and closing, and includes an inner liner. The evaporation module of the plate-tube throttling evaporator assembly is connected to the outer wall of the inner liner. Specifically, the evaporation module is installed on the outer wall of the inner liner.

[0075] Specifically, the refrigeration and freezing device also includes a refrigeration system, which consists of a compressor 10, a condenser 20, a throttling module 30, and an evaporation module 40.

[0076] like Figure 6 As shown, in some optional embodiments of the present invention, the throttling module 30 includes at least two first throttling modules 31 arranged in parallel.

[0077] The refrigeration and freezing unit also includes a controller, which is configured to: open any one of the first throttling modules 31 when the refrigerant pressure in the refrigeration system is not greater than the preset pressure; and open any two or more of the first throttling modules 31 when the refrigerant pressure in the refrigeration system is greater than the preset pressure.

[0078] Alternatively, the controller may be configured to: activate any one of the first throttling modules 31 when the compressor speed in the refrigeration system is not greater than the preset speed; and activate any two or more of the first throttling modules 31 when the compressor speed in the refrigeration system is greater than the preset speed.

[0079] In a refrigeration system, the higher the refrigerant pressure or compressor speed, the greater the refrigerant flow and ejection noise generated. In this case, opening multiple first throttling modules can significantly reduce noise. That is, compared to a single first throttling module, this embodiment includes at least two first throttling modules arranged in parallel. On the one hand, under the same refrigerant pressure conditions, the refrigeration system of this invention can still have lower noise; on the other hand, under the same output noise condition, this invention can increase the upper limit of the applicable refrigerant pressure and the upper limit of the operating compressor speed in the refrigeration system.

[0080] like Figure 7 As shown, in some optional embodiments of the present invention, the throttling module further includes a second throttling module 32, which includes a capillary tube. The second throttling module 32 is connected to the evaporation module 40 and is arranged in parallel with the first throttling module 31. That is, the second throttling module does not include an expansion tube.

[0081] In this embodiment, the refrigeration and freezing device further includes a controller, which is configured to: activate the second throttling module 32 when the refrigerant pressure in the refrigeration system is not greater than the preset pressure; and activate the first throttling module 31 when the refrigerant pressure in the refrigeration system is greater than the preset pressure.

[0082] Alternatively, the controller may be configured to: activate the second throttling module 32 when the compressor speed in the refrigeration system is not greater than the preset speed; and activate the first throttling module 31 when the compressor speed in the refrigeration system is greater than the preset speed.

[0083] like Figure 6 andFigure 7 As shown, in some optional embodiments of the present invention, the refrigeration system further includes a pressure sensor 60, which is disposed on the discharge pipe of the compressor 10 and used to test the discharge pressure of the compressor 10; that is, the pressure sensor 60 is located between the discharge port of the compressor 10 and the inlet of the condenser 20. Obtaining the refrigerant pressure includes: obtaining the discharge pressure of the compressor 10 and using the discharge pressure as the refrigerant pressure.

[0084] like Figure 6 and Figure 7 As shown, in some optional embodiments of the present invention, the refrigeration system further includes a switching valve 33, the inlet of which is connected to the outlet of the condenser 20, and the outlet of which is connected to a first throttling module 31 and / or a second throttling module 32. The switching valve 33 is used to control the opening or closing of the first throttling module 31 and / or the second throttling module 32 according to the refrigerant pressure and / or compressor speed.

[0085] More preferably, the switching valve 33 is a proportional valve. The proportional valve can control the opening degree of each capillary tube according to the actual speed, thereby balancing the actual speed of the compressor and the noise of the working fluid, thus achieving the best noise reduction effect.

[0086] In some alternative embodiments of the invention, the refrigeration and freezing apparatus further includes an electric heater and a controller. The heating element of the electric heater is thermally connected to the expansion tube via a heat-conducting element. The controller is electrically connected to the electric heater and is configured to activate the electric heater to heat the expansion tube when the expansion tube reaches the defrosting condition.

[0087] Because the expansion chamber with its silencing structure at the end of the capillary tube section of the expansion tube 302 causes a significant cooling effect on the refrigerant, it easily leads to frost formation on the expansion tube 302. In this embodiment, a heat-conducting component and an electric heater are used to defrost the expansion tube; and the surface of the expansion tube is not covered with silencing material.

[0088] Specifically, a temperature sensor is provided on the surface of the expansion tube 302 to obtain the surface temperature of the expansion tube 302. In this embodiment, the specific method for detecting whether the expansion tube 302 has reached the defrosting condition is as follows: determine whether the surface temperature of the expansion tube 302 is not greater than a preset temperature; when the surface temperature of the expansion tube 302 is not greater than the preset temperature, the defrosting condition has been reached; when the surface temperature of the expansion tube 302 is greater than the preset temperature, the defrosting condition has not been reached.

[0089] In this embodiment, the heater does not operate when the expansion tube 302 does not meet the defrosting conditions; when the expansion tube 302 meets the defrosting conditions, the heater starts and heats the expansion tube 302. This invention can quickly defrost the expansion tube 302, and the defrosting method is simple and easy to operate.

[0090] More preferably, one end of the heat-conducting element is attached to or wrapped around the surface of the expansion tube, and the other end of the heat-conducting element is attached to or wrapped around the surface of the heating part of the electric heater.

[0091] In some optional embodiments of the present invention, the refrigeration and freezing device is a refrigerator. In other optional embodiments of the present invention, the refrigeration and freezing device is a freezer.

[0092] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A plate-tube throttling evaporation assembly, characterized in that, include: An evaporation module, comprising an evaporation plate and evaporation tubes fixed thereon; A throttling module is disposed relatively independently outside the evaporation module and connected to the inlet end of the evaporation tube; The inlet and outlet ends of the evaporator tube are located on different sides of the evaporator plate; and the outlet section of the throttling module is located between the inlet and outlet ends and is arranged around the periphery of the evaporator plate. The evaporation tube includes a serpentine tube and an inlet tube arranged in series. The serpentine tube is located on the surface of the evaporation plate. The inlet tube is vertically arranged and located on the right side outside the evaporation plate. The outlet at the top of the inlet tube is connected to the opening on the upper right side of the serpentine tube. The inlet at the bottom of the inlet tube is located at the middle position in the vertical direction of the evaporation plate. The outlet section of the throttling module includes a vertical section and a horizontal section. The vertical section is connected to the inlet pipe, and the horizontal section is located at the lower end of the vertical section and below the serpentine pipe. The throttling module includes a first throttling module, which includes a capillary tube and an expansion tube arranged in series. The cross-sectional area of ​​the inner channel of the expansion tube is larger than that of the inner channel of the capillary tube, and the outlet of the expansion tube is connected to the inlet of the evaporation tube. The throttling module includes at least two first throttling modules arranged in parallel, wherein at least two of the first throttling modules have different numbers and / or structures of expansion tubes; the structure of the expansion tube includes the pipe length and / or the cross-sectional area of ​​the inner channel; the plate-tube throttling evaporator assembly is configured to select one or more first throttling modules based on the refrigerant pressure of the refrigeration system, the compressor speed, and the noise reduction of each first throttling module; or The throttling module further includes a second throttling module, which includes a capillary tube. The second throttling module is connected to the evaporation module and is arranged in parallel with the first throttling module. The plate-tube throttling evaporation assembly is configured such that: when the refrigerant pressure of the refrigeration system and the speed of the compressor are both less than their respective preset values, the second throttling module is turned on and the first throttling module is turned off; when the refrigerant pressure of the refrigeration system and / or the speed of the compressor are not less than their respective preset values, the first throttling module is turned on and the second throttling module is turned off.

2. The plate-tube throttling evaporator assembly according to claim 1, characterized in that, The first throttling module has two or more expansion tubes, one of which is connected in series between the capillary tube and the evaporation module to form a final expansion tube, and the outlet of the final expansion tube is connected to the inlet of the evaporation tube; the remaining expansion tubes are connected in series in the capillary tube to divide the capillary tube into at least two capillary tube segments and form an intermediate expansion tube.

3. The plate-tube throttling evaporator assembly according to claim 2, characterized in that, In the first throttling module, at least two of the expansion tubes have different pipe lengths and / or different cross-sectional areas within the pipe channels; and / or At least two of the capillary segments have different pipe lengths and / or different cross-sectional areas of the pipe channels.

4. The plate-tube throttling evaporator assembly according to claim 3, characterized in that, In the first throttling module, the pipe length of each capillary segment is greater than the pipe length of any of the expansion tubes; Of the capillary segments, the first segment is located near the inlet of the first throttling module, and the last segment is located near the outlet of the throttling module. The capillary segment located in the second segment has the longest pipe length.

5. A refrigeration and freezing apparatus, characterized in that, include: Storage space, configured as a closed space with controlled opening and closing, the storage space including an inner liner; As described in any one of claims 1-4, the evaporation module of the plate-tube throttling evaporation assembly is connected to the outer wall of the inner liner.

6. The refrigeration and freezing apparatus according to claim 5, characterized in that, The refrigeration and freezing apparatus also includes: An electric heater, wherein the heating element of the electric heater is thermally connected to the expansion tube via a heat-conducting component; A controller, which is electrically connected to the electric heater, is configured to activate the electric heater to heat the expansion tube when the expansion tube reaches the defrosting condition.

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