Heat exchange mechanism and cold storage device

Abstract

The invention relates to a heat exchange mechanism and a cold storage device. The heat exchange mechanism comprises a runner plate, a refrigerant inlet and a refrigerant outlet are formed in the runner plate, and a refrigerant enters the runner plate from the refrigerant inlet and is discharged from the refrigerant outlet; a first flow channel, a second flow channel and a third flow channel are arranged in the flow channel plate, the first end of the first flow channel is communicated to the refrigerant inlet, and the second end of the first flow channel is closed; the first end of the second flow channel communicates with the refrigerant outlet, and the second end of the second flow channel is closed. The two ends of each third flow channel communicate with the first flow channel and the second flow channel correspondingly, and the multiple third flow channels are connected in parallel. According to the heat exchange mechanism and the cold storage device, the multiple third flow channels are arranged, multiple times of turbulent flow is formed for the refrigerant at the intersections of the first flow channel and the third flow channels and the intersections of the second flow channel and the third flow channels, the flowing boundary layer of the refrigerant is broken, release of cooling capacity in the refrigerant is accelerated, and therefore the purpose of improving the cold charging efficiency of the cold storage device is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cold storage equipment, and in particular to a heat exchange mechanism and a cold storage device. Background Art

[0002] In recent years, with the significant improvement of people's living standards and the enhancement of health awareness, consumers' demand for high-quality fresh food and pharmaceutical products has been growing. Especially in the field of temperature-sensitive products such as fresh fruits and vegetables, aquatic products and biological preparations, the importance of cold chain logistics has become increasingly prominent. As a key link in the cold chain, refrigerated transportation is directly related to the freshness and safety of products. Among them, cold storage refrigerated trucks are gradually gaining favor in the industry due to their significant energy-saving characteristics, low operating costs and simple maintenance procedures. The core of cold storage refrigerated trucks is to use pre-cooled cold storage devices to absorb the heat generated inside and outside the car, effectively control the temperature inside the car, and ensure the quality of the goods.

[0003] Among them, refrigerant liquid cooling is a common way to charge cold storage devices, which has the advantage of faster heat exchange rate compared to cold air cooling. Although refrigerant liquid-cooled cold storage devices have extremely high heat exchange coefficients, there are still problems such as uneven cooling distribution and poor temperature uniformity, resulting in low cold charging efficiency of the cold storage device. Summary of the invention

[0004] Based on this, it is necessary to provide a heat exchange mechanism and a cold storage device to improve the cold charging efficiency of the cold storage device.

[0005] In a first aspect, the present application provides a heat exchange mechanism, the heat exchange mechanism comprising a flow channel plate, the flow channel plate being respectively provided with a refrigerant inlet and a refrigerant outlet, the refrigerant entering the flow channel plate from the refrigerant inlet and being discharged from the refrigerant outlet;

[0006] A first flow channel is provided in the flow channel plate, a first end of the first flow channel is connected to the refrigerant inlet, and a second end of the first flow channel is closed;

[0007] A second flow channel is further provided in the flow channel plate, a first end of the second flow channel is connected to the refrigerant outlet, and a second end of the second flow channel is closed;

[0008] A plurality of third flow channels are further arranged in the flow channel plate, two ends of the third flow channels are respectively connected to the first flow channel and the second flow channel, and the plurality of third flow channels are connected in parallel.

[0009] In one embodiment, at least two first flow channels are provided, and at least two first flow channels are connected to the second flow channel through corresponding plurality of third flow channels;

[0010] Part of the first flow channel is arranged on one side of the second flow channel, and another part of the first flow channel is arranged on the other side opposite to the second flow channel.

[0011] In one embodiment, the first flow channels on both sides of the second flow channel are symmetrically arranged relative to the second flow channel.

[0012] In one embodiment, a plurality of the third flow channels are disposed between the first flow channel and the second flow channel on both sides of the second flow channel, and the third flow channels on both sides of the second flow channel are symmetrically disposed relative to the second flow channel.

[0013] In one embodiment, the second end of the first flow channel and the first end of the second flow channel merge at the refrigerant outlet, and a first partition is disposed between the second end of the first flow channel and the first end of the second flow channel.

[0014] In one embodiment, the first end of the first flow channel and the second end of the second flow channel converge at the refrigerant inlet, and a second partition is disposed between the first end of the first flow channel and the second end of the second flow channel.

[0015] In one embodiment, the cross-sectional area of ​​the third flow channel is smaller than or equal to the cross-sectional area of ​​the first flow channel; and / or the cross-sectional area of ​​the third flow channel is smaller than or equal to the cross-sectional area of ​​the second flow channel.

[0016] In one of the embodiments, the flow channel plate is provided with hollows, and the hollows are located in a plurality of spaces enclosed by the first flow channel, the second flow channel, and the third flow channel.

[0017] In a second aspect, the present application provides a cold storage device, comprising a shell and a heat exchange mechanism as in the above embodiment, wherein the heat exchange mechanism is arranged inside the shell, and the refrigerant inlet and the refrigerant outlet are connected to the outside of the shell, and a cold storage agent is also arranged in the shell, and the heat exchange mechanism is used to cool the cold storage agent.

[0018] In one embodiment, a filling nozzle is provided on the shell, and the filling nozzle is communicated with the interior of the shell;

[0019] The cold storage device also includes a sealing cover, which is detachably connected to the filling nozzle.

[0020] The heat exchange mechanism and cold storage device are connected to the first flow channel and the second flow channel by setting a plurality of third flow channels in parallel. After the refrigerant enters the first flow channel from the refrigerant inlet, it flows through the plurality of third flow channels multiple times and finally flows out from the first end of the second flow channel. Moreover, since the second end of the first flow channel and the second end of the second flow channel are closed, the second flow channel is not directly connected to the refrigerant inlet, and the first flow channel is not directly connected to the refrigerant outlet. The refrigerant entering the first flow channel will be guided back to the third flow channel, and then flow into the second flow channel from the third flow channel, and finally flow out from the refrigerant outlet. In this process, the refrigerant will be evenly distributed in the first flow channel, the second flow channel and the third flow channel, and fully and evenly exchange heat with the cold storage agent, which is conducive to improving the cooling and temperature equalization effect of the entire heat exchange mechanism. Furthermore, since multiple third flow channels are arranged in parallel, multiple turbulences will be formed on the refrigerant at the intersection of the first flow channel and the third flow channel, and the second flow channel and the third flow channel, thereby breaking the flow boundary layer of the refrigerant, accelerating the release of cold in the refrigerant, and accelerating the heat exchange efficiency between the refrigerant and the cold storage agent, thereby achieving the purpose of improving the cold charging efficiency of the cold storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a schematic diagram of the three-dimensional structure of a cold storage device provided in one embodiment of the present application.

[0022] FIG. 2 is a schematic diagram of the internal flow channel structure of a cold storage device provided in one embodiment of the present application.

[0023] FIG3 is a schematic diagram of the internal structure of a cold storage device provided in one embodiment of the present application.

[0024] Reference numerals:

[0025] 11. flow channel plate; 110. hollowing; 111. first flow channel plate; 1110. first flow channel; 1111. first flow channel section; 1112. second flow channel section; 1113. third flow channel section; 112. second flow channel plate; 1120. second flow channel; 113. third flow channel plate; 1130. third flow channel; 114. refrigerant inlet plate; 1140. refrigerant inlet; 115. refrigerant outlet plate; 1150. refrigerant outlet; 12. first baffle; 13. second baffle;

[0026] 2. Shell;

[0027] 3. Filling nozzle;

[0028] 4. Sealing cover;

[0029] 5. Sealing ring. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] Among refrigerated transportation methods, land transportation has become the mainstream choice due to its wide coverage and high flexibility. As the main means of land transportation, the innovation and improvement of refrigerated trucks' cooling methods are crucial to improving the efficiency of cold chain logistics. Mechanical, cold storage, LNG (liquefied natural gas) and liquid nitrogen / dry ice are several common cooling technologies. Among them, cold storage refrigerated trucks are gradually gaining favor in the industry due to their significant energy-saving characteristics, low operating costs and simple maintenance procedures.

[0037] Cold storage refrigerated trucks use pre-cooled cold storage devices to cool down refrigerated trucks. The cold storage device is equipped with a cold storage agent, which absorbs the heat generated inside and outside the car through the phase change process of the cold storage agent, effectively controlling the temperature in the car and ensuring the quality of the goods. The cold storage capacity of the cold storage device is limited by the capacity of the cold storage agent it can accommodate, which means that there is also an upper limit to the amount of cold that the cold storage device can release. As the cold storage agent in the cold storage device is gradually exhausted, a new cold storage device must be replaced in time to maintain a constant temperature in the car. The replacement efficiency of the cold storage device directly affects the transportation efficiency and cost. After the cold storage device with exhausted cold storage is replaced, it needs to be frozen in time for reuse. Therefore, the charging and freezing efficiency of the cold storage device, that is, the freezing efficiency of the cold storage agent, directly affects the replacement efficiency of the cold storage device.

[0038] Among them, refrigerant liquid cooling is a commonly used cooling method for cold storage devices, which has the advantage of faster heat exchange rate compared to cold air cooling. The refrigerant liquid cooling method is to set a heat exchange channel in the cold storage agent, so that the refrigerant circulates in the heat exchange channel, takes away the heat in the cold storage agent, and cools the cold storage agent through heat exchange between the refrigerant and the cold storage agent. Therefore, the heat exchange efficiency between the refrigerant and the cold storage agent is the key to improving the cooling rate of the cold storage device.

[0039] In traditional cold storage devices, the heat exchange channels are generally set as straight channels and U-shaped channels. The flow direction of the refrigerant in the heat exchange channel is basically consistent and the flow is relatively stable. However, during the freezing process of the cold storage agent, there are still problems such as uneven cooling distribution and poor temperature uniformity, resulting in low cold storage agent charging efficiency.

[0040] After in-depth research by the applicant, it was found that the heat exchange efficiency between the refrigerant and the cold storage agent is limited by the flow boundary layer of the refrigerant. Breaking the flow boundary layer of the refrigerant is conducive to the release of cold by the refrigerant, thereby improving the heat exchange efficiency with the cold storage agent. To this end, the applicant found an idea to break the flow boundary layer through the study of plant veins in nature. The leaf vein network of plants shows a fractal structure that can accurately transport water and nutrients to every corner of the leaves with extremely low energy loss. Similarly, the tracheal system of the human lungs, with its exquisite branching structure, achieves efficient gas exchange and energy transmission. Drawing on these efficient transmission models in nature, integrating the principles of bionics into the refrigerant flow channel design of the cold storage device can significantly improve the temperature uniformity and heat exchange efficiency during the cold charging process. By simulating the essence of the leaf vein fractal network and the lung tracheal structure, the refrigerant flow channel in the cold storage device can be carefully designed to form an intricate but highly ordered network. Such a design promotes heat exchange, achieves uniform temperature distribution, and effectively avoids the occurrence of local overcooling or overheating. The cold storage device demonstrates higher efficiency and better performance during the cold charging process, providing strong support for the innovation of cold chain logistics technology.

[0041] The structures of the heat exchange structure and the cold storage device are described in detail below in conjunction with the embodiments.

[0042] Refer to FIG1 , which shows a schematic diagram of the three-dimensional structure of a cold storage device provided in an embodiment of the present application. The cold storage device includes a shell 2 and a heat exchange mechanism, the heat exchange mechanism is arranged inside the shell 2, and a cold storage agent is also arranged inside the shell 2, and the heat exchange mechanism is used to cool the cold storage agent. The cold storage agent is cooled by the heat exchange mechanism, so that the cold storage agent is continuously cooled until it reaches a frozen state. The cold storage device that reaches a frozen state can be installed in a refrigerated truck to maintain a constant temperature in the vehicle.

[0043] Specifically, the appearance of the shell 2 can be flexibly selected according to the actual application scenario. For example, the shell 2 can be set to a regular rectangular structure, so that it can be neatly stacked in standardized cold chain transportation equipment, which is conducive to maximizing the use of storage space. At the same time, considering the use requirements in certain specific environments, the shell 2 can also adopt a disc-shaped structure, which is conducive to seamless embedding in a circular or curved space to ensure the uniformity of cold distribution.

[0044] As shown in FIG1 , the housing 2 is configured as a rectangular parallelepiped, the length direction of the housing 2 is the left-right direction in FIG1 , the height direction is the up-down direction, and the width direction is the front-back direction in FIG1 . The width of the housing 2 is relatively small, and the whole is in the form of a thin plate. The housing 2 is a hollow structure, and the wall thickness of the housing 2 can be set to 1 mm-2 mm to minimize the thermal resistance in the heat conduction process, thereby ensuring efficient heat exchange performance.

[0045] In one embodiment, as shown in FIG1 , a filling nozzle 3 is provided on the housing 2, and the filling nozzle 3 is communicated with the interior of the housing 2, and the cold storage agent is filled into the housing 2 or released from the housing 2 through the filling nozzle 3. The cold storage device further includes a sealing cover 4, which is detachably connected to the filling nozzle 3, and the filling nozzle 3 is opened or closed by setting the sealing cover 4.

[0046] In one embodiment, the filling nozzle 3 is disposed on the upper surface of the housing 2 to facilitate the operation of filling or releasing the refrigerant. The filling nozzle 3 and the housing 2 are configured as an integrated structure, which is beneficial to the stability and sealing of the connection between the two.

[0047] In order to improve the sealing performance of the connection between the sealing cover 4 and the filling nozzle 3, a sealing ring 5 is sleeved on the outer side surface of the filling nozzle 3. When the sealing cover 4 is covered on the filling nozzle 3, the sealing ring 5 is clamped between the filling nozzle 3 and the sealing cover 4 to improve the sealing performance between the sealing cover 4 and the filling nozzle 3.

[0048] Optionally, the sealing ring 5 can be set as a trapezoidal sealing ring 5, and the outer diameter of the sealing ring 5 gradually increases from the end facing the sealing cover 4 to the end close to the shell 2, so as to facilitate the sealing cover 4 to be inserted into the outside of the sealing ring 5. At the same time, the trapezoidal sealing ring 5 can fit tightly with the sealing cover 4, effectively sealing the gap between the filling nozzle 3 and the sealing cover 4, ensuring that the cold storage device has excellent sealing performance during use and avoiding accidental leakage of the internal coolant.

[0049] In the embodiment of the present application, the heat exchange mechanism is mainly improved. The embodiment of the present application provides a heat exchange mechanism, as shown in Figures 2 and 3, Figure 2 shows a schematic diagram of the internal flow channel structure of the cold storage device provided in an embodiment of the present application; Figure 3 shows a schematic diagram of the internal structure of the cold storage device provided in an embodiment of the present application. The heat exchange mechanism includes a flow channel plate 11, on which a refrigerant inlet 1140 and a refrigerant outlet 1150 are respectively provided, the refrigerant inlet 1140 and the refrigerant outlet 1150 are connected to the outside of the shell 2, and the refrigerant enters the flow channel plate 11 from the refrigerant inlet 1140 and is discharged from the refrigerant outlet 1150; a first flow channel 1110 is provided in the flow channel plate 11, a first end of the first flow channel 1110 is connected to the refrigerant inlet 1140, and a second end of the first flow channel 1110 is closed; a second flow channel 1120 is also provided in the flow channel plate 11, a first end of the second flow channel 1120 is connected to the refrigerant outlet 1150, and a second end of the second flow channel 1120 is closed; a plurality of third flow channels 1130 are also provided in the flow channel plate 11, and both ends of the third flow channel 1130 are respectively connected to the first flow channel 1110 and the second flow channel 1120, and the plurality of third flow channels 1130 are connected in parallel.

[0050] The heat exchange mechanism provided in the embodiment of the present application connects the first flow channel 1110 with the second flow channel 1120 by providing a plurality of third flow channels 1130 connected in parallel. After the refrigerant enters the first flow channel 1110 from the refrigerant inlet 1140, it flows through the plurality of third flow channels 1130 multiple times, and finally flows out from the first end of the second flow channel 1120. The flow direction of the refrigerant in the flow channel plate 11 is specifically shown by arrows a and b in FIG. 2 , where arrow a shows the flow direction of the refrigerant in the first flow channel 1110; and arrow b shows the flow direction of the refrigerant in the second flow channel 1120.

[0051] Moreover, since the second end of the first flow channel 1110 and the second end of the second flow channel 1120 are closed, the second flow channel 1120 is not directly connected to the refrigerant inlet 1140, and the first flow channel 1110 is not directly connected to the refrigerant outlet 1150, the refrigerant entering the first flow channel 1110 will be guided back to the third flow channel 1130, and then flow into the second flow channel 1120 from the third flow channel 1130, and finally flow out from the refrigerant outlet 1150. In this process, the refrigerant will be evenly distributed in the first flow channel 1110, the second flow channel 1120 and the third flow channel 1130, and fully and evenly exchange heat with the refrigerant, which is conducive to improving the cooling and temperature equalization effect of the entire heat exchange mechanism. Furthermore, since multiple third flow channels 1130 are arranged in parallel, multiple turbulences will be formed on the refrigerant at the intersection of the first flow channel 1110 and the third flow channel 1130, and the second flow channel 1120 and the third flow channel 1130, thereby breaking the flow boundary layer of the refrigerant, accelerating the release of cold in the refrigerant, and accelerating the heat exchange efficiency between the refrigerant and the coolant, thereby achieving the purpose of improving the cold charging efficiency of the cool storage device.

[0052] In one embodiment, at least two first flow channels 1110 are provided, and at least two first flow channels 1110 are connected to the second flow channel 1120 through corresponding third flow channels 1130; wherein, part of the first flow channels 1110 are provided on one side of the second flow channel 1120, and another part of the first flow channels 1110 are provided on the other side opposite to the second flow channel 1120. By providing at least two first flow channels 1110, and at least two of them are provided on the opposite sides of the second flow channel 1120, it is beneficial to evenly distribute the flow channels in the flow channel plate 11, so that the heat exchange mechanism has a better temperature uniformity effect.

[0053] Optionally, as shown in FIG. 2 , the first flow channels 1110 on both sides of the second flow channel 1120 are symmetrically arranged relative to the second flow channel 1120 to further improve the uniformity of the flow channel distribution in the flow channel plate 11 , thereby enabling the heat exchange mechanism to have a better temperature uniformity effect.

[0054] In one embodiment, as shown in FIG2 , the refrigerant inlet 1140 is disposed on the left side of the flow channel plate 11 and is centered therein, and the refrigerant outlet 1150 is disposed on the right side of the flow channel plate 11 and is centered therein. The second flow channel 1120 is extended left and right and is centered in the up-down direction of the flow channel plate 11, and the two ends of the second flow channel 1120 are respectively facing the refrigerant inlet 1140 and the refrigerant outlet 1150, so that the first flow channel 1110 is symmetrically disposed on the upper and lower sides of the second flow channel 1120.

[0055] In one embodiment, as shown in FIG. 2, there are two first flow channels 1110, which are respectively arranged on the upper side and the lower side of the second flow channel 1120. Optionally, the first flow channel 1110 is arranged in a U shape, and the two first flow channels 1110 and the second flow channel 1120 form a structure in the shape of the Chinese character 'Ri' (day). The refrigerant entering from the refrigerant inlet 1140 will be divided into two paths flowing upward and downward along the two first flow channels 1110, and the flow direction of the refrigerant in the first flow channel 1110 is specifically as shown by the arrow a in FIG. 2.

[0056] Optionally, a plurality of third flow channels 1130 are arranged between the first flow channels 1110 on both sides of the second flow channel 1120 and the second flow channel 1120, and the third flow channels 1130 on both sides of the second flow channel 1120 are symmetrically arranged with respect to the second flow channel 1120. The first flow channel 1110, the second flow channel 1120 and the third flow channel 1130 form a vein-like network in the flow channel plate 11, which transports the refrigerant to various parts of the flow channel plate 11, ensuring uniform coverage of the refrigerant in the entire heat exchange mechanism and high-efficiency heat exchange.

[0057] A plurality of third flow channels 1130 are uniformly arranged in parallel between the first flow channel 1110 and the second flow channel 1120. By arranging the third flow channels 1130, the uniform diffusion of the refrigerant inside the flow channel plate 11 is greatly promoted. At the intersection of the third flow channel 1130 and the first flow channel 1110, and at the intersection of the third flow channel 1130 and the second flow channel 1120, during the continuous splitting and merging process of the refrigerant, its flow state is frequently changed, and the flow boundary layer is continuously broken. The continuous change of the flow state of the refrigerant effectively weakens the thermal resistance in convective heat transfer, thereby improving the heat exchange efficiency between the refrigerant and the cold storage agent and ensuring the high-performance performance of the cold storage device during the charging process.

[0058] In one embodiment, please continue to refer to FIG. 2. The first flow channel 1110 is arranged in a U shape, and its middle section is parallel to the second flow channel 1120. The third flow channel 1130 is inclined between the middle section of the first flow channel 1110 and the second flow channel 1120. The third flow channel 1130 is inclined from the end connected to the first flow channel 1110 to the other end towards the second end of the second flow channel 1120, so as to improve the convective effect at the intersection of the third flow channel 1130 and the first flow channel 1110, and at the intersection of the third flow channel 1130 and the second flow channel 1120, which is beneficial to further weakening the thermal resistance in convective heat transfer and improving the heat exchange efficiency.

[0059] In one embodiment, the second end of the first flow channel 1110 and the first end of the second flow channel 1120 converge at the refrigerant outlet 1150, and a first partition 12 is provided between the second end of the first flow channel 1110 and the first end of the second flow channel 1120. By providing the first partition 12, the first flow channel 1110 and the second flow channel 1120 are separated, so that the second end of the first flow channel 1110 forms a closed state, so that the refrigerant in the first flow channel 1110 cannot directly enter the second flow channel 1120, and can flow back to the third flow channel 1130 at a relatively high pressure.

[0060] The first end of the first flow channel 1110 and the second end of the second flow channel 1120 are combined at the refrigerant inlet 1140, and a second partition 13 is provided between the first end of the first flow channel 1110 and the second end of the second flow channel 1120. By providing the second partition 13, the first flow channel 1110 and the second flow channel 1120 are separated, and the refrigerant entering the first flow channel 1110 from the refrigerant inlet cannot directly enter the second flow channel 1120 through the second end of the second flow channel 1120, and all flows upward or downward along the first flow channel 1110, so that it can be diverted to the third flow channel 1130 at a relatively high pressure.

[0061] In one embodiment, as shown in FIG2 , the cross-sectional area of ​​the third flow channel 1130 is less than or equal to the cross-sectional area of ​​the first flow channel 1110; and / or, the cross-sectional area of ​​the third flow channel 1130 is less than or equal to the cross-sectional area of ​​the second flow channel 1120. The first flow channel 1110 and the second flow channel 1120 have larger cross-sectional areas and serve as the main flow channel, while the third flow channel 1130 has a smaller cross-sectional area and serves as the branch flow channel.

[0062] Referring to FIG. 3 , the flow channel plate 11 is provided with a hollow 110, which is located in a plurality of spaces enclosed by the first flow channel 1110, the second flow channel 1120 and the third flow channel 1130. The hollow 110 can be filled with a refrigerant, which is beneficial to increase the volume of the refrigerant that can be accommodated inside the shell 2, thereby increasing the amount of cold that can be provided by the refrigerant device in a single charge. Furthermore, the refrigerant is surrounded by each flow channel, and can quickly exchange heat with the refrigerant in each flow channel.

[0063] 3, the flow channel plate 11 is disposed in the shell 2 and is spaced apart from the inner walls of the shell 2. After the refrigerant is injected into the shell 2, the refrigerant will wrap the flow channel plate 11, so that the refrigerant in the flow channel can fully exchange heat with the refrigerant wrapped outside.

[0064] In one embodiment, the flow channel plate 11 includes a first flow channel plate 111, a second flow channel plate 112 and a third flow channel plate 113. The first flow channel plate 111 is provided with a first flow channel 1110, the second flow channel plate 112 is provided with a second flow channel 1120, and the third flow channel plate 113 is provided with a third flow channel 1130. The first flow channel plate 111, the second flow channel plate 112 and the third flow channel plate 113 are configured into a leaf vein structure.

[0065] The flow channel plate 11 further includes a refrigerant inlet plate 114 and a refrigerant outlet plate 115, which are respectively connected to the two ends of the first flow channel 1110. The refrigerant inlet plate 114 is provided with a refrigerant inlet 1140, and the refrigerant outlet plate 115 is provided with a refrigerant outlet 1150, and the refrigerant inlet 1140 is communicated with the first flow channel 1110, and the refrigerant outlet 1150 is communicated with the second flow channel 1120. In order to make the refrigerant inlet 1140 and the refrigerant outlet 1150 communicate with the outside, the shell 2 is respectively provided with openings at positions facing the refrigerant inlet 1140 and the refrigerant outlet 1150, and the refrigerant inlet 1140 and the refrigerant outlet 1150 are aligned with the openings on the shell 2.

[0066] In order to prevent leakage of refrigerant from the opening of the shell 2, the refrigerant inlet plate 114 and the refrigerant outlet plate 115 are sealed and connected to the shell 2. In one embodiment, the refrigerant inlet plate 114 and the refrigerant outlet plate 115 are set as an integrated structure with the shell 2, which is firmly connected and has good sealing performance.

[0067] Optionally, the first flow channel plate 111 includes a first flow channel section 1111, a second flow channel section 1112, and a third flow channel section 1113 connected in sequence, wherein one end of the first flow channel section 1111 facing away from the second flow channel section 1112 is connected to the refrigerant inlet plate 114, and one end of the third flow channel section 1113 facing away from the second flow channel section 1112 is connected to the refrigerant outlet plate 115. The second flow channel section 1112 is arranged in parallel with the second flow channel plate 112.

[0068] In one embodiment, the flow channel plate 11 is configured as an integrated structure with the housing 2. The first flow channel plate 111, the second flow channel plate 112, the third flow channel plate 113, the refrigerant inlet plate 114 and the refrigerant outlet plate 115 are configured as an integrated structure, thereby ensuring the overall structural strength of the cold storage device.

[0069] The cold storage device provided in the embodiment of the present application uses a quick-release structure to connect the refrigerant inlet 1140 and the refrigerant outlet 1150 of the heat exchange mechanism in the refrigerated truck to the refrigeration unit before the cold charging process begins. After the refrigeration unit is started, the flow path of the refrigerant is indicated by arrows a and b in Figure 2, and the refrigerant inlet 1140 is not connected to the second flow channel 1120 opposite to it, thereby driving the refrigerant to flow through the first flow channels 1110 on the upper and lower sides first. Then, since the first flow channels 1110 on the upper and lower sides are not directly connected to the refrigerant outlet 1150, the refrigerant in the first flow channel 1110 will be guided back to the third flow channel 1130, and then flow out from the refrigerant outlet 1150 through the second flow channel 1120. In this process, the refrigerant is evenly distributed in the vein-shaped flow channel plate 11, and sufficient heat exchange is carried out with the cold storage agent in the shell 2. Through this design, the temperature dead zone in the flow channel plate 11 is significantly reduced, and the refrigerant is continuously divided, merged, and the boundary layer is thinned when flowing through the intersection of the flow channels, which significantly improves the convective heat transfer efficiency and accelerates the charging speed of the cold storage device.

[0070] After a period of low-temperature circulation, the cold storage device is fully charged. At this time, the quick-disassembly structure can be quickly disassembled to disconnect the refrigeration unit. Then the refrigerated truck is loaded with cold chain products and can set out to perform transportation tasks. During the loading and unloading of cold chain products and during transportation, a temperature difference will occur between the car and the cold storage device due to external heat and the respiratory heat generated by the products themselves. The cold storage device will then begin to release cold to maintain a stable temperature in the car to ensure that the safety and quality of the cold chain products are not affected.

[0071] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A heat exchange mechanism, characterized in that: The heat exchange mechanism comprises a flow channel plate (11), the flow channel plate (11) being provided with a refrigerant inlet (1140) and a refrigerant outlet (1150), respectively, and the refrigerant enters the flow channel plate (11) from the refrigerant inlet (1140) and is discharged from the refrigerant outlet (1150); A first flow channel (1110) is provided in the flow channel plate (11), a first end of the first flow channel (1110) is connected to the refrigerant inlet (1140), and a second end of the first flow channel (1110) is closed; A second flow channel (1120) is further provided in the flow channel plate (11), a first end of the second flow channel (1120) is connected to the refrigerant outlet (1150), and a second end of the second flow channel (1120) is closed; A plurality of third flow channels (1130) are also provided in the flow channel plate (11), and two ends of the third flow channels (1130) are respectively connected to the first flow channel (1110) and the second flow channel (1120), and the plurality of third flow channels (1130) are connected in parallel.

2. The heat exchange mechanism according to claim 1, characterized in that: At least two of the first flow channels (1110) are provided, and at least two of the first flow channels (1110) are connected to the second flow channel (1120) through the corresponding plurality of third flow channels (1130); Part of the first flow channel (1110) is arranged on one side of the second flow channel (1120), and another part of the first flow channel (1110) is arranged on the other side opposite to the second flow channel (1120).

3. The heat exchange mechanism according to claim 2, characterized in that: The first flow channels (1110) on both sides of the second flow channel (1120) are arranged symmetrically relative to the second flow channel (1120).

4. The heat exchange mechanism according to claim 2, characterized in that: A plurality of the third flow channels (1130) are arranged between the first flow channel (1110) and the second flow channel (1120) on both sides of the second flow channel (1120), and the third flow channels (1130) on both sides of the second flow channel (1120) are symmetrically arranged relative to the second flow channel (1120).

5. The heat exchange mechanism according to claim 1, characterized in that: The second end of the first flow channel (1110) and the first end of the second flow channel (1120) converge at the refrigerant outlet (1150), and a first partition plate (12) is provided between the second end of the first flow channel (1110) and the first end of the second flow channel (1120).

6. The heat exchange mechanism according to claim 1, characterized in that: The first end of the first flow channel (1110) and the second end of the second flow channel (1120) converge at the refrigerant inlet (1140), and a second partition plate (13) is provided between the first end of the first flow channel (1110) and the second end of the second flow channel (1120).

7. The heat exchange mechanism according to any one of claims 1 to 6, characterized in that: The cross-sectional area of ​​the third flow channel (1130) is smaller than or equal to the cross-sectional area of ​​the first flow channel (1110); and / or the cross-sectional area of ​​the third flow channel (1130) is smaller than or equal to the cross-sectional area of ​​the second flow channel (1120).

8. The heat exchange mechanism according to any one of claims 1 to 6, characterized in that: The flow channel plate (11) is provided with a hollowing out (110), and the hollowing out (110) is located within a plurality of spaces enclosed by the first flow channel (1110), the second flow channel (1120), and the third flow channel (1130).

9. A cold storage device, characterized in that: The invention comprises a shell (2) and a heat exchange mechanism according to any one of claims 1 to 8, wherein the heat exchange mechanism is arranged inside the shell (2), and the refrigerant inlet (1140) and the refrigerant outlet (1150) are connected to the outside of the shell (2), and a refrigerant is also arranged inside the shell (2), and the heat exchange mechanism is used to cool the refrigerant.

10. The cold storage device according to claim 9, characterized in that: The shell (2) is provided with a filling nozzle (3), and the filling nozzle (3) is communicated with the interior of the shell (2); The cold storage device further comprises a sealing cover (4), wherein the sealing cover (4) is detachably connected to the filling nozzle (3).

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