Low temperature processing system and method

Abstract

The present invention relates to the field of cryogenic treatment technology, and provides a cryogenic treatment system and method. The cryogenic treatment system includes a cryogenic treatment device; a cold recovery device; a first exhaust port of the cryogenic treatment device, a first air inlet of the cold recovery device, a second exhaust port of the cold recovery device and a second air inlet of the cryogenic treatment device are sequentially connected to form a first cold circulation loop; a third exhaust port of the cold recovery device, a third air inlet of the cryogenic treatment device, a fourth exhaust port of the cryogenic treatment device and a fourth air inlet of the cold recovery device are sequentially connected to form a second cold circulation loop; the cold recovery device includes a cold storage box and a refrigeration component, the refrigeration component includes a heat exchanger and a refrigerator, the heat exchanger is arranged inside the cold storage box, and the refrigerator is connected to the heat exchanger. The cryogenic treatment system can realize the cyclic cooling of the cooling medium and the recovery of cold, thereby reducing energy consumption. In addition, the refrigeration working strategy in the valley power stage can effectively reduce the electricity cost.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic treatment, and in particular to a cryogenic treatment system and method. Background Art

[0002] At present, cryogenic treatment technologies (such as cold treatment of metal materials, low-temperature quick freezing of food, etc.) usually use refrigerators as refrigerants to perform low-temperature treatment on materials to improve the performance of materials (such as wear resistance and dimensional stability of metal materials, storage time of food). During the cryogenic treatment process, the working gas is usually discharged to the environment at a temperature not higher than the material processing temperature, resulting in a large amount of cold loss. Refrigerator is a major way to obtain low temperature, which consumes electrical energy to obtain a lower cooling temperature. Traditional cooling methods usually use electric-driven refrigerators to cool down directly during the period when cooling is needed, without considering the fact that the price of industrial electricity is different at different times of the day.

[0003] In response to the above-mentioned problem of cold energy loss, the existing technology usually uses phase change materials to recover the cold energy of the discharged low-temperature nitrogen gas, and then uses heat exchange equipment to send the cold energy back to the low-temperature treatment device when needed, thereby reducing the energy consumption of the system. However, the actual exhaust temperature after passing through the cold energy recovery device is still lower than the room temperature, and it is difficult to recover the cold energy 100%. In addition, the cold energy recovery device is non-continuous. During the cold energy utilization process, the working gas passed into the cold energy recovery device needs to be dehumidified or additionally nitrogen needs to be used, which increases the difficulty and cost of operation. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a low temperature treatment system, in which a low temperature treatment device and a cold recovery device are connected through a cold circulation pipeline to form a closed circulation system, thereby realizing full recovery of cold.

[0005] An embodiment of the present invention provides a low temperature processing system, comprising:

[0006] Cryogenic treatment equipment;

[0007] Cold recovery device;

[0008] The first exhaust port of the low temperature treatment device, the first air inlet of the cold recovery device, the second exhaust port of the cold recovery device and the second air inlet of the low temperature treatment device are connected in sequence to form a first cold circulation loop;

[0009] The third exhaust port of the cold recovery device, the third air inlet of the low temperature treatment device, the fourth exhaust port of the low temperature treatment device and the fourth air inlet of the cold recovery device are connected in sequence to form a second cold circulation loop;

[0010] The cold recovery device includes a cold storage box and a refrigeration component. The refrigeration component includes a heat exchanger and a refrigerator. The heat exchanger is arranged inside the cold storage box, and the refrigerator is connected to the heat exchanger.

[0011] The cryogenic treatment system of the embodiment of the present invention provides a cryogenic treatment system that can recycle the cold of the cooling medium to address the problems that the existing cryogenic treatment devices cannot completely recover the cold of the cooling medium, and the operation is difficult and costly during the cold recovery process. The cryogenic treatment device and the cold recovery device are connected through a cold circulation pipeline to form a closed circulation system to achieve full recovery of cold. Two sets of air inlets and two sets of exhaust ports are respectively provided on the cryogenic treatment device and the cold recovery device to form two independent first cold circulation loops and second cold circulation loops, respectively, and the flow direction of the cooling medium in the first cold circulation loop is opposite to that in the second cold circulation loop. The first cold circulation loop allows the cooled object to exchange heat with the cooling medium in the low-temperature treatment device, and then the cooling medium enters the cold recovery device, where all the cold is recovered and the cooling medium is discharged, or returns to the low-temperature treatment device after heat exchange and cooling in the cold recovery device; the second cold circulation loop allows the cooling medium in the low-temperature treatment device to enter the cold recovery device, and exchange heat with the cold storage material in the cold recovery device for cooling, and then returns to the low-temperature treatment device to exchange heat with the cooled object again, thereby reducing energy consumption.

[0012] According to one embodiment of the present invention, the first air inlet and the third exhaust port are both located at the top of the cold storage box, the second exhaust port and the fourth air inlet are both located at the bottom of the cold storage box, and the heat exchanger is located on one side of the cold storage box close to the second exhaust port and the fourth air inlet.

[0013] According to one embodiment of the present invention, the low-temperature treatment device includes a cryogenic box, in which a cooled object is arranged, the third air inlet and the first exhaust port are both located at the top of the cryogenic box, and the fourth exhaust port and the second air inlet are both located at the bottom of the cryogenic box.

[0014] According to one embodiment of the present invention, the refrigeration assembly further includes a fan, and the fan is arranged inside the cryogenic box and below the object to be cooled.

[0015] According to one embodiment of the present invention, a liquid inlet valve is provided on the liquid inlet pipeline connecting the refrigerator and the heat exchanger, and a liquid outlet valve is provided on the liquid outlet pipeline connecting the refrigerator and the heat exchanger.

[0016] According to one embodiment of the present invention, a first temperature detector is provided at the top of the deep cold box, and a second temperature detector is provided at the top and bottom of the cold storage box.

[0017] According to one embodiment of the present invention, a first exhaust valve is provided at the first exhaust port, a first intake valve is provided at the first intake port, a second exhaust valve is provided at the second exhaust port, and a second intake valve is provided at the second intake port.

[0018] According to one embodiment of the present invention, a third exhaust valve is provided at the third exhaust port, a third intake valve is provided at the third intake port, a fourth exhaust valve is provided at the fourth exhaust port, and a fourth intake valve is provided at the fourth intake port.

[0019] According to an embodiment of the present invention, a branch pipeline is provided on the pipeline connecting the first exhaust port and the first air inlet, and a pressure relief valve is provided on the branch pipeline.

[0020] The embodiment of the present invention also provides a low temperature treatment method using the low temperature treatment system as described above, comprising: selecting to perform the initial temperature reduction treatment during the off-peak period, turning on the refrigeration component, rotating the fan forward, closing the second cold circulation loop, opening the connecting pipeline between the first exhaust port of the low temperature treatment device of the first cold circulation loop and the first air inlet of the cold recovery device, closing the connecting pipeline between the second exhaust port of the cold recovery device and the second air inlet of the low temperature treatment device, and opening the branch pipeline connected to the second exhaust port;

[0021] When the temperature of the middle part of the cold storage material in the cold recovery device is lower than the preset temperature, the branch pipe connected to the second exhaust port is closed, the refrigeration component is stopped, the fan is reversed, the second cold circulation loop is opened, and the first cold circulation loop is closed;

[0022] The first cold cycle treatment, when the temperature of the top of the cold storage material in the cold recovery device is higher than the temperature in the low temperature treatment device, the fan rotates forward, the first cold cycle loop is opened, and the second cold cycle loop is closed;

[0023] The second cold cycle treatment, when the temperature at the bottom of the cold storage material in the cold recovery device is higher than the temperature in the low temperature treatment device, the fan is reversed, the first cold cycle loop is closed, and the second cold cycle loop is opened;

[0024] The first cooling cycle treatment and the second cooling cycle treatment are performed alternately in sequence.

[0025] The low-temperature processing method provided in the embodiment of the present invention converts cheap off-peak electricity (usually at night) into cold energy through a refrigerator and stores it in a cold storage material; during the peak electricity stage when the price is the highest (usually during the day), the cold energy in the cold storage material is taken out through a cooling medium and used to cool the cooled object, thereby achieving a significant reduction in electricity costs.

[0026] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0027] The cryogenic treatment system of the embodiment of the present invention provides a cryogenic treatment system that can recycle the cold of the cooling medium to address the problems that the existing cryogenic treatment devices cannot completely recover the cold of the cooling medium, and the operation is difficult and costly during the cold recovery process. The cryogenic treatment device and the cold recovery device are connected through a cold circulation pipeline to form a closed circulation system to achieve full recovery of cold. Two sets of air inlets and two sets of exhaust ports are respectively provided on the cryogenic treatment device and the cold recovery device to form two independent first cold circulation loops and second cold circulation loops, respectively, and the flow direction of the cooling medium in the first cold circulation loop is opposite to that in the second cold circulation loop. The first cold circulation loop allows the cooled object to exchange heat with the cooling medium in the low-temperature treatment device, and then the cooling medium enters the cold recovery device, where all the cold is recovered and the cooling medium is discharged, or returns to the low-temperature treatment device after heat exchange and cooling in the cold recovery device; the second cold circulation loop allows the cooling medium in the low-temperature treatment device to enter the cold recovery device, and exchange heat with the cold storage material in the cold recovery device for cooling, and then returns to the low-temperature treatment device to exchange heat with the cooled object again, thereby reducing energy consumption.

[0028] In addition, in view of the fact that there is a large difference in the price of peak electricity and valley electricity, an embodiment of the present invention also provides a low-temperature treatment method using the low-temperature treatment system as described above, which converts the electric energy of cheap valley electricity (usually at night) into cold energy through a refrigerator and stores it in a cold storage material; during the peak electricity stage when the price is the highest (usually during the day), the cold energy in the cold storage material is taken out through a cooling medium and used to cool materials, thereby achieving a significant reduction in electricity costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a low temperature processing system provided in an embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031] 100. Low temperature treatment device; 102. Cold recovery device; 104. Cold storage box; 106. Heat exchanger; 108. Refrigerator; 110. Deep cold box; 112. Fan; 114. Liquid inlet valve; 116. Liquid outlet valve; 118. First temperature detector; 120. Second temperature detector; 122. First exhaust valve; 124. First air inlet valve; 126. Second exhaust valve; 128. Second air inlet valve; 130. Third exhaust valve; 132. Third air inlet valve; 134. Fourth exhaust valve; 136. Fourth air inlet valve; 138. Branch pipeline; 140. Pressure relief valve; 142. Motor; 144. Cold storage material; 146. Object to be cooled. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the invention clearer, the technical solution in the invention will be clearly described below in conjunction with the drawings in the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or 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.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] like Figure 1 As shown, an embodiment of the present invention provides a low temperature processing system, comprising:

[0038] Low temperature processing device 100;

[0039] Cold recovery device 102;

[0040] The first exhaust port of the cryogenic treatment device 100, the first air inlet of the cold recovery device 102, the second exhaust port of the cold recovery device 102 and the second air inlet of the cryogenic treatment device 100 are sequentially connected to form a first cold circulation loop;

[0041] The third exhaust port of the cold recovery device 102, the third air inlet of the low temperature treatment device 100, the fourth exhaust port of the low temperature treatment device 100 and the fourth air inlet of the cold recovery device 102 are sequentially connected to form a second cold circulation loop;

[0042] The cold energy recovery device 102 includes a cold storage box 104 and a refrigeration component. The refrigeration component includes a heat exchanger 106 and a refrigerator 108. The heat exchanger 106 is disposed inside the cold storage box 104, and the refrigerator 108 is connected to the heat exchanger 106.

[0043] The cryogenic treatment system of the embodiment of the present invention provides a cryogenic treatment system that can recycle the cold of the cooling medium in order to solve the problems that the existing cryogenic treatment device 100 cannot completely recover the cold of the cooling medium, and the operation is difficult and costly during the cold recovery process. The cryogenic treatment device 100 and the cold recovery device 102 are connected through a cold circulation pipeline to form a closed circulation system to achieve full recovery of cold. Two sets of air inlets and two sets of exhaust ports are respectively provided on the cryogenic treatment device 100 and the cold recovery device 102 to form two independent first cold circulation loops and second cold circulation loops, respectively, and the flow direction of the cooling medium in the first cold circulation loop is opposite to that in the second cold circulation loop. The first cold circulation loop allows the cooled object 146 to exchange heat with the cooling medium in the low-temperature treatment device 100, and then the cooling medium enters the cold recovery device 102, where all the cold is recovered and the cooling medium is discharged, or returns to the low-temperature treatment device 100 after heat exchange and cooling in the cold recovery device 102; the second cold circulation loop allows the cooling medium in the low-temperature treatment device 100 to enter the cold recovery device 102, and exchange heat with the cold storage material 144 in the cold recovery device 102 for cooling, and then returns to the low-temperature treatment device 100 to exchange heat with the cooled object 146 again, thereby reducing energy consumption.

[0044] Specifically, the low temperature processing device 100 includes a cryogenic box 110, in which a cooled object 146 is arranged, wherein the third air inlet and the first exhaust port are both located at the top of the cryogenic box 110, and the fourth exhaust port and the second air inlet are both located at the bottom of the cryogenic box 110.

[0045] The cold recovery device 102 includes a cold storage box 104 and a refrigeration assembly, the refrigeration assembly includes a heat exchanger 106 and a refrigerator 108, the heat exchanger 106 is arranged inside the cold storage box 104, and the refrigerator 108 is connected to the heat exchanger 106. Among them, the first air inlet and the third air outlet are both located at the top of the cold storage box 104, the second air outlet and the fourth air inlet are both located at the bottom of the cold storage box 104, and the heat exchanger 106 is located on one side of the cold storage box 104 close to the second air outlet and the fourth air inlet.

[0046] In an embodiment of the present invention, the first exhaust port of the cryogenic treatment device 100, the first air inlet of the cold recovery device 102, the second exhaust port of the cold recovery device 102 and the second air inlet of the cryogenic treatment device 100 are connected in sequence to form a first cold circulation loop to circulate the cold in the cold recovery device 102 to the cryogenic treatment device 100, and the high-temperature cooling medium after heat exchange in the cryogenic treatment device 100 is again introduced into the cold recovery device 102 to cool the high-temperature cooling medium.

[0047] Similarly, the third exhaust port of the cold recovery device 102, the third air inlet of the low-temperature treatment device 100, the fourth exhaust port of the low-temperature treatment device 100 and the fourth air inlet of the cold recovery device 102 are connected in sequence to form a second cold circulation loop to circulate the cold in the cold recovery device 102 to the low-temperature treatment device 100, and to pass the high-temperature cooling medium after heat exchange in the low-temperature treatment device 100 into the cold recovery device 102 again to cool the high-temperature cooling medium.

[0048] That is, the refrigerant is introduced into the heat exchanger 106 through the refrigerator 108, and then heat exchange occurs with the cooling medium in the cold storage tank 104 through the heat exchanger 106, so that the cooling medium in the cold storage tank 104 can be cooled. Then, when the cooling medium circulates in the first cooling circulation loop or the second cooling circulation loop, the cooled object 146 in the low-temperature treatment device 100 can be cooled.

[0049] The first cooling circulation loop and the second cooling circulation loop are opened or closed according to different situations in the cooling recovery device 102 .

[0050] According to one embodiment of the present invention, the refrigeration assembly further includes a fan 112, which is disposed inside the cryogenic box 110 and below the object to be cooled 146. The fan 112 is electrically connected to an external motor 142 to control the start, stop and direction of the fan 112.

[0051] That is, the cooling medium can be driven by the fan 112. For example, the cooling medium can be air or nitrogen. The fan 112 is located inside the cryogenic box 110 and is placed below the object to be cooled 146. When the fan 112 rotates forward, the cooling medium is discharged from the low-temperature treatment device 100 through the first exhaust port, flows into the cold recovery device 102 through the first air inlet, and after heat exchange with the heat exchanger 106, is discharged from the cold recovery device 102 through the second exhaust port, and flows into the low-temperature treatment device 100 through the second air inlet to realize circulation.

[0052] When the fan 112 is reversed, the cooling medium is discharged from the low-temperature treatment device 100 through the fourth exhaust port, flows into the cold recovery device 102 through the fourth air inlet, and after heat exchange with the heat exchanger 106, is discharged from the cold recovery device 102 through the third exhaust port, and flows into the low-temperature treatment device 100 through the third air inlet to realize circulation.

[0053] According to one embodiment of the present invention, a liquid inlet valve 114 is provided on the liquid inlet pipeline connecting the refrigerator 108 and the heat exchanger 106 , and a liquid outlet valve 116 is provided on the liquid outlet pipeline connecting the refrigerator 108 and the heat exchanger 106 .

[0054] By providing an inlet valve 114 on the inlet pipeline connecting the refrigerator 108 and the heat exchanger 106 and providing an outlet valve 116 on the outlet pipeline connecting the refrigerator 108 and the heat exchanger 106, the time and flow rate of the cooling medium input and output can be controlled.

[0055] According to one embodiment of the present invention, a first temperature detector 118 is disposed at the top of the deep cold box 110 , and a second temperature detector 120 is disposed at the top and the bottom of the cold storage box 104 .

[0056] A first temperature detector 118 is arranged in the cryogenic box 110 for detecting the real-time temperature inside the cryogenic box 110, and a second temperature detector 120 is arranged near the top and bottom of the cold storage box 104 for detecting the real-time temperature inside the cold storage box 104. The circulation direction of the cooling medium can be controlled by the relationship between the detected temperatures of the first temperature detector 118 and the second temperature detector 120. In this embodiment, both the first temperature detector 118 and the second temperature detector 120 are thermometers.

[0057] According to one embodiment of the present invention, a first exhaust valve 122 is provided at the first exhaust port, a first intake valve 124 is provided at the first intake port, a second exhaust valve 126 is provided at the second exhaust port, and a second intake valve 128 is provided at the second intake port; a third exhaust valve 130 is provided at the third exhaust port, a third intake valve 132 is provided at the third intake port, a fourth exhaust valve 134 is provided at the fourth exhaust port, and a fourth intake valve 136 is provided at the fourth intake port.

[0058] Specifically, the cold circulation pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline connecting the deep cold box 110 and the cold storage box 104, all of which are arranged outside the deep cold box 110 and the cold storage box 104, and each is equipped with a switch valve, that is, the first pipeline connecting the first exhaust port and the first air inlet is correspondingly provided with a first exhaust valve 122 and a first air inlet valve 124, the second pipeline connecting the second exhaust port and the second air inlet is correspondingly provided with a second exhaust valve 126 and a second air inlet valve 128, the fourth pipeline connecting the third exhaust port and the third air inlet is correspondingly provided with a third exhaust valve 130 and a third air inlet valve 132, and the third pipeline connecting the fourth exhaust port and the fourth air inlet is correspondingly provided with a fourth exhaust valve 134 and a fourth air inlet valve 136.

[0059] When the first cooling circulation loop is opened, the first exhaust valve 122, the first air intake valve 124, the second exhaust valve 126 and the second air intake valve 128 are opened; when the first cooling circulation loop is closed, these four valves are also closed accordingly; when the second cooling circulation loop is opened, the third exhaust valve 130, the third air intake valve 132, the fourth exhaust valve 134 and the fourth air intake valve 136 are opened; when the second cooling circulation loop is closed, these four valves are also closed accordingly.

[0060] Each cooling circulation pipeline is wrapped with insulation material to reduce cooling loss. When the first cooling circulation loop or the second cooling circulation loop is operated, the relevant air inlet valve or exhaust valve control can be manually controlled or automatically controlled, so as to circulate and recycle the cooling capacity of the low-temperature cooling medium.

[0061] According to one embodiment of the present invention, a branch pipeline 138 is provided on the pipeline connecting the first exhaust port and the first air inlet, and a pressure relief valve 140 is provided on the branch pipeline 138 .

[0062] During the initial cooling process, the refrigeration component is turned on, and the refrigerant exchanges heat with the cooling medium through the heat exchanger 106. After the cooling medium exchanges heat with the object to be cooled 146, it enters the cold storage tank 104 through the first pipeline from the deep cold box 110, stores the cold energy in the cold storage material 144, and then is discharged through the pressure relief valve 140 of the branch line 138, so as to recover the cold energy of the cooling medium in the cold energy recovery device 102. That is, the first exhaust valve 122, the first air intake valve 124, the second exhaust valve 126 and the pressure relief valve 140 are opened, and the second air intake valve 128, the third exhaust valve 130, the third air intake valve 132, the fourth exhaust valve 134 and the fourth air intake valve 136 are all closed.

[0063] The embodiment of the present invention further provides a low temperature processing method using the low temperature processing system as described above, comprising:

[0064] The first cooling process is performed during the off-peak period, the refrigeration component is turned on, the fan 112 rotates forward, the second cooling circulation loop is closed, the connecting pipeline between the first exhaust port of the low-temperature treatment device 100 and the first air inlet of the cooling recovery device 102 of the first cooling circulation loop is opened, the connecting pipeline between the second exhaust port of the cooling recovery device 102 and the second air inlet of the low-temperature treatment device 100 is closed, and the branch pipeline 138 connected to the second exhaust port is opened;

[0065] When the temperature of the middle part of the cold storage material 144 in the cold recovery device 102 is lower than the preset temperature, the branch pipe 138 is closed, the refrigeration component is stopped, the fan 112 is reversed, the second cold circulation loop is opened, and the first cold circulation loop is closed;

[0066] In the first cold cycle treatment, when the temperature of the top of the cold storage material 144 in the cold recovery device 102 is higher than the temperature in the low temperature treatment device 100, the fan 112 rotates forward, the first cold cycle loop is turned on, and the second cold cycle loop is turned off;

[0067] Second cold cycle treatment, when the temperature at the bottom of the cold storage material 144 in the cold recovery device 102 is higher than the temperature in the low temperature treatment device 100, the fan 112 is reversed, the first cold cycle loop is closed, and the second cold cycle loop is opened;

[0068] The first cooling cycle treatment and the second cooling cycle treatment are performed alternately in sequence.

[0069] The low-temperature treatment method provided in an embodiment of the present invention utilizes the refrigerator 108 for cooling during the off-peak period and realizes heat exchange with the heat exchanger 106, so that the cold energy prepared by the refrigerator 108 can enter the cold energy recovery device 102, and then enter the low-temperature treatment device 100 through the circulation pipeline to cool the cooled object 146.

[0070] When the temperature in the middle of the cold storage material 144 in the cold recovery device 102 is lower than the preset temperature, the refrigerator 108 is turned off, and only the cold stored in the cold storage box 104 is used to cool the cooled object 146 in the low-temperature treatment device through the circulation pipeline, which can effectively reduce energy consumption.

[0071] At the same time, the first cold circulation loop allows the cooled object 146 to exchange heat with the cooling medium in the low-temperature treatment device 100, and then the low-temperature cooling medium enters the cold recovery device 102, in which all the cold is recovered and the cooling medium is discharged, or returns to the low-temperature treatment device 100 after heat exchange and cooling in the cold recovery device 102; the second cold circulation loop allows the cooling medium in the low-temperature treatment device 100 to enter the cold recovery device 102, and exchange heat with the cold storage material 144 in the cold recovery device 102 for cooling, and then returns to the low-temperature treatment device 100 to exchange heat with the cooled object 146 again, thereby reducing energy consumption.

[0072] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0073] The cryogenic treatment system of the embodiment of the present invention provides a cryogenic treatment system that can recycle the cold of the cooling medium in order to solve the problems that the existing cryogenic treatment device 100 cannot completely recover the cold of the cooling medium, and the operation is difficult and costly during the cold recovery process. The cryogenic treatment device 100 and the cold recovery device 102 are connected through a cold circulation pipeline to form a closed circulation system to achieve full recovery of cold. Two sets of air inlets and two sets of exhaust ports are respectively provided on the cryogenic treatment device 100 and the cold recovery device 102 to form two independent first cold circulation loops and second cold circulation loops, respectively, and the flow direction of the cooling medium in the first cold circulation loop is opposite to that in the second cold circulation loop. The first cold circulation loop allows the cooled object 146 to exchange heat with the cooling medium in the low-temperature treatment device 100, and then the low-temperature cooling medium enters the cold recovery device 102, in which all the cold is recovered and the cooling medium is discharged, or returns to the low-temperature treatment device 100 after heat exchange and cooling in the cold recovery device 102; the second cold circulation loop allows the cooling medium in the low-temperature treatment device 100 to enter the cold recovery device 102, and exchange heat with the cold storage material 144 in the cold recovery device 102 for cooling, and then returns to the low-temperature treatment device 100 to exchange heat with the cooled object 146 again, thereby reducing energy consumption.

[0074] In addition, in view of the fact that there is a large difference in the price of peak electricity and valley electricity, an embodiment of the present invention also provides a low-temperature treatment method using the low-temperature treatment system as described above, which converts the electric energy of cheap valley electricity (usually at night) into cold energy through a refrigerator and stores it in the cold storage material 144; during the peak electricity stage when the price is the highest (usually during the day), the cold energy in the cold storage material 144 is taken out through a cooling medium and used to cool materials, thereby achieving a significant reduction in electricity costs.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low temperature processing system, characterized in that: include: Low temperature processing device (100); Cold recovery device (102); The first exhaust port of the low temperature treatment device (100), the first air inlet of the cold energy recovery device (102), the second exhaust port of the cold energy recovery device (102) and the second air inlet of the low temperature treatment device (100) are connected in sequence to form a first cold energy circulation loop; The third exhaust port of the cold energy recovery device (102), the third air inlet of the low temperature treatment device (100), the fourth exhaust port of the low temperature treatment device (100) and the fourth air inlet of the cold energy recovery device (102) are connected in sequence to form a second cold energy circulation loop; The cold energy recovery device (102) comprises a cold storage box (104) and a refrigeration component, the refrigeration component comprises a heat exchanger (106) and a refrigerator (108), the heat exchanger (106) is arranged inside the cold storage box (104), and the refrigerator (108) is connected to the heat exchanger (106); The first air inlet and the third air outlet are both located at the top of the cold storage box (104), the second air outlet and the fourth air inlet are both located at the bottom of the cold storage box (104), and the heat exchanger (106) is located on one side of the cold storage box (104) close to the second air outlet and the fourth air inlet; The low temperature treatment device (100) comprises a cryogenic box (110), wherein a cooled object is arranged in the cryogenic box (110), the third air inlet and the first air outlet are both located at the top of the cryogenic box (110), and the fourth air outlet and the second air inlet are both located at the bottom of the cryogenic box (110).

2. The cryogenic treatment system according to claim 1, characterized in that: The refrigeration assembly further comprises a fan (112), wherein the fan (112) is arranged inside the cryogenic box (110) and is located below the object to be cooled.

3. The cryogenic treatment system according to claim 1, characterized in that: A liquid inlet valve (114) is provided on a liquid inlet pipeline connecting the refrigerator (108) and the heat exchanger (106), and a liquid outlet valve (116) is provided on a liquid outlet pipeline connecting the refrigerator (108) and the heat exchanger (106).

4. The cryogenic treatment system according to claim 1, characterized in that: A first temperature detector (118) is provided at the top of the deep cold box (110), and a second temperature detector (120) is provided at the top and bottom of the cold storage box (104).

5. The cryogenic treatment system according to any one of claims 1 to 4, characterized in that: A first exhaust valve (122) is provided at the first exhaust port, a first intake valve (124) is provided at the first intake port, a second exhaust valve (126) is provided at the second exhaust port, and a second intake valve (128) is provided at the second intake port.

6. The cryogenic treatment system according to claim 5, characterized in that: The third exhaust port is provided with a third exhaust valve (130), the third air inlet is provided with a third air inlet valve (132), the fourth exhaust port is provided with a fourth exhaust valve (134), and the fourth air inlet is provided with a fourth air inlet valve (136).

7. The cryogenic treatment system according to claim 5, characterized in that: A branch pipeline (138) is provided on the pipeline connecting the first exhaust port and the first intake port, and a pressure relief valve (140) is provided on the branch pipeline (138).

8. A low temperature treatment method using the low temperature treatment system according to any one of claims 1 to 7, characterized in that: include: Selecting to perform the initial cooling treatment during the off-peak period, turning on the refrigeration component, rotating the fan (112) forward, closing the second cooling circulation loop, opening the connecting pipeline between the first exhaust port of the low-temperature treatment device (100) and the first air inlet of the cooling recovery device (102) of the first cooling circulation loop, closing the connecting pipeline between the second exhaust port of the cooling recovery device (102) and the second air inlet of the low-temperature treatment device (100), and opening the branch pipeline (138) connected to the second exhaust port; When the temperature of the middle part of the cold storage material in the cold recovery device (102) is lower than a preset temperature, the branch pipe (138) connected to the second exhaust port is closed, the refrigeration component is stopped, the fan (112) is reversed, the second cold circulation loop is opened, and the first cold circulation loop is closed; First cold energy circulation treatment, when the temperature at the top of the cold storage material in the cold energy recovery device (102) is higher than the temperature in the low temperature treatment device (100), the fan (112) rotates forward, the first cold energy circulation loop is opened, and the second cold energy circulation loop is closed; Second cold circulation treatment, when the temperature at the bottom of the cold storage material in the cold recovery device (102) is higher than the temperature in the low temperature treatment device (100), the fan (112) is reversed, the first cold circulation loop is closed, and the second cold circulation loop is opened; The first cooling cycle treatment and the second cooling cycle treatment are performed alternately in sequence.

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