Refrigeration system, vehicle, control method, and storage medium

Abstract

The application provides a refrigeration system, a vehicle, a control method and a storage medium. The refrigeration system comprises a controller, n solid-state refrigeration pipes, a heat exchanger, a motor and an electronic valve group. The controller can select some solid-state refrigeration pipes to be powered from the n solid-state refrigeration pipes, control the electronic valve group to open the flow channels of the selected solid-state refrigeration pipes and close the flow channels of the solid-state refrigeration pipes not used for refrigeration, and control the motor to drive the heat exchange medium in the heat exchange circuit to circulate in the heat exchanger and the flow channels of the solid-state refrigeration pipes used for refrigeration, so as to refrigerate. In this way, the refrigeration system can realize refrigeration without a compressor and a condenser, can avoid noise generated by the operation of the compressor, and is beneficial to improving the user experience. In addition, the refrigeration demand can be met while the weight and the volume of the system are reduced, which is beneficial to the lightweight design of the system.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a refrigeration system, a vehicle, a control method, and a storage medium. Background Art

[0002] As users' demand for daily refrigeration increases, the application scenarios of refrigeration systems are becoming more and more extensive. For example, refrigerators have gradually been installed in cars from home use, and the emergence of car refrigerators has further met the growing needs of users. Conventional refrigeration systems, taking refrigerators as an example, are usually based on compressor-type car refrigerator solutions. The system relies on compressors, condensers, fans, etc. The components generate large vibrations and noises during operation, affecting the user experience. In addition, the compressor, condenser, and fan will increase the weight and volume of the system, which is not conducive to lightweight design. For example, the patent application with application number CN201711064437.1 discloses a compressor refrigeration car refrigerator. This solution relies on the compressor to compress the refrigerant, and the condenser and evaporator use the physical phase change of the refrigerant to release heat and absorb heat for cooling. This solution has the aforementioned defects. Summary of the Invention

[0003] In view of this, the purpose of the embodiments of the present application is to provide a refrigeration system, a vehicle, a control method and a storage medium, which can improve the problem of high refrigeration noise and disadvantageous lightweight design.

[0004] To achieve the above technical objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a refrigeration system, the system comprising: a controller, n solid-state refrigeration pipelines, a heat exchanger, a motor, and an electronic valve group, wherein n is an integer greater than or equal to 2;

[0006] The n solid-state refrigeration pipelines are arranged in parallel and communicated with the heat exchanger to form a heat exchange circuit, and the motor and the electronic valve group are arranged in the heat exchange circuit;

[0007] When the refrigeration system is running, the controller selects some of the n solid-state refrigeration pipelines to power on based on the target control strategy, controls the electronic valve group to open the flow channels of the solid-state refrigeration pipelines used for refrigeration, and closes the flow channels of the solid-state refrigeration pipelines not used for refrigeration, and controls the operation of the motor to drive the heat exchange medium in the heat exchange circuit to circulate in the heat exchanger and the flow channels of the solid-state refrigeration pipelines used for refrigeration.

[0008] In conjunction with the first aspect, in some optional embodiments, the target control strategy is: the controller selects a control strategy corresponding to the current temperature difference based on a pre-established correspondence between the temperature difference and the control strategy;

[0009] The current temperature difference is the difference between the current first temperature and the desired second temperature in the first container of the refrigeration system;

[0010] The control parameters in the control strategy include at least one of the working quantity of the solid-state refrigeration pipeline, the rotation speed of the motor, and the valve opening of the electronic valve group.

[0011] In combination with the first aspect, in some optional implementations, the temperature difference is positively correlated with the number of operations, or the rotational speed, or the valve opening.

[0012] In conjunction with the first aspect, in some optional implementations, the target control strategy includes:

[0013] Divide the n solid-state refrigeration pipelines into p groups of solid-state refrigeration pipelines, and control each group of solid-state refrigeration pipelines in the p groups to be alternately powered on and cyclically operated in a set order, wherein 2≤p≤n, and p is an integer;

[0014] The electronic valve group is controlled to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

[0015] In conjunction with the first aspect, in some optional implementations, the target control strategy includes:

[0016] Randomly selecting some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines as a first group of solid-state refrigeration pipelines, and selecting solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0017] Controlling the 1+i group of solid-state refrigeration pipelines to power off after being powered on for a specified period of time, and after the 1+i group of solid-state refrigeration pipelines are powered off, selecting part or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines as the 2+i group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration, and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling the operation of the motor, wherein i is cyclically taken from 0 to 1 in sequence, I is a preset integer greater than 0, and when i is 0, the 1+i group of solid-state refrigeration pipelines is the 1st group of solid-state refrigeration pipelines.

[0018] In combination with the first aspect, in some optional embodiments, the solid-state refrigeration pipeline includes one or more solid-state refrigeration modules connected in series and arranged in a pipe body of the solid-state refrigeration pipeline.

[0019] In conjunction with the first aspect, in some optional implementations, the total cooling capacity of the n solid-state refrigeration pipelines satisfies the following conditions:

[0020] P0≥P1

[0021] Wherein, P0 refers to the total cooling capacity of the n solid-state refrigeration pipelines, P0 = ξγnV0ΔT / Δt, where ξ is the thermal conductivity between the polar material in the solid-state refrigeration module and the heat exchange medium; the polar material is used to absorb heat when powered on, or release heat when powered on and absorb heat after power is off;

[0022] Emax refers to the maximum electric field applied to the polar material; E0 refers to the initial value of the electric field of the polar material; P refers to the polarization intensity of the polar material; T refers to the temperature of the polar material; E refers to the electric field intensity of the polar material in the solid-state refrigeration pipeline;

[0023] n refers to the number of solid-state refrigeration pipelines;

[0024] V0=Sd, S=LC, V0 refers to the volume of the polar material in the solid-state refrigeration pipeline; S refers to the coverage area of ​​the polar material in the flow channel of the solid-state refrigeration pipeline; d refers to the thickness of the polar material; L refers to the length of the flow channel of the solid-state refrigeration pipeline; C refers to the circumference of the cross section of the polar material in the tube body;

[0025] ΔT refers to the temperature drop of the stored object in the refrigeration system within a time period of Δt when the ambient temperature is T0;

[0026] P1 refers to the required cooling capacity;

[0027] P1=Q 总 / △t;

[0028] Q 总 is the total required heat load of the refrigeration system,

[0029] Q 总 =Q 物 +Q air +Q 传 , Q 物 Refers to the heat load of the items stored in the refrigeration system, Q air Refers to the heat load of the air in the refrigerated space of the refrigeration system, Q 传 Refers to the heat load transmitted from the environment to the refrigerated space;

[0030] The condition P0≥P1 is converted to ξγnLCd△T≥Q 总 .

[0031] In combination with the first aspect, in some optional embodiments, the system further includes a first container for placing refrigerated items, and the heat exchanger includes a first pipe attached to the first container, and the first pipe is connected to the flow channels of n solid-state refrigeration pipelines.

[0032] In combination with the first aspect, in some optional embodiments, the first container is provided with an expansion interface, and the system further includes a second container connected to the first container via the expansion interface.

[0033] In combination with the first aspect, in some optional embodiments, the system further includes a second pipe and a third pipe connecting the first container and the second container, and a fan is provided in the second pipe and / or the third pipe.

[0034] In combination with the first aspect, in some optional embodiments, the system further includes a sealing plug, which is used to seal the expansion interface when the expansion interface is not connected to the second container.

[0035] In combination with the first aspect, in some optional embodiments, the electronic valve group includes n groups of electronic valves, and each group of the n groups of electronic valves includes a first valve and a second valve arranged at both ends of the flow channel of the corresponding solid-state refrigeration pipeline.

[0036] In combination with the first aspect, in some optional embodiments, the solid-state refrigeration pipeline has a flow channel that bends back and forth, and n solid-state refrigeration pipelines are stacked.

[0037] In a second aspect, an embodiment of the present application further provides a vehicle, comprising a vehicle body and the above-mentioned refrigeration system.

[0038] In a third aspect, an embodiment of the present application further provides a control method, which is applied to the above-mentioned refrigeration system, and the method includes:

[0039] Based on the target control strategy, some solid-state refrigeration pipelines are selected from n solid-state refrigeration pipelines to be powered on, where n is an integer greater than or equal to 2;

[0040] The electronic valve group is controlled to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the motor is controlled to drive the heat exchange medium in the heat exchange circuit to circulate in the heat exchanger and the flow channel of the solid-state refrigeration pipeline used for refrigeration.

[0041] In conjunction with the third aspect, in some optional implementations, before selecting and powering on some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines based on the target control strategy, the method further includes:

[0042] Based on a pre-established correspondence between temperature differences and control strategies, a control strategy corresponding to the current temperature difference is selected as the target control strategy, wherein the current temperature difference is the difference between the current first temperature and the desired second temperature in the first container of the refrigeration system, and the control parameters in the control strategy include at least one of the working number of the solid-state refrigeration pipeline, the speed of the motor, and the valve opening in the electronic valve group.

[0043] In combination with the third aspect, in some optional implementations, the temperature difference is positively correlated with the number of operations, or the rotational speed, or the valve opening.

[0044] In conjunction with the third aspect, in some optional implementations, based on the target control strategy, selecting some solid-state refrigeration pipelines from n solid-state refrigeration pipelines to be powered on includes:

[0045] Divide the n solid-state refrigeration pipelines into p groups of solid-state refrigeration pipelines, and control each group of solid-state refrigeration pipelines in the p groups to be alternately powered on and cyclically operated in a set order, wherein 2≤p≤n, and p is an integer;

[0046] The electronic valve group is controlled to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

[0047] In conjunction with the third aspect, in some optional implementations, based on the target control strategy, selecting some solid-state refrigeration pipelines from n solid-state refrigeration pipelines to be powered on includes:

[0048] Randomly selecting some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines as a first group of solid-state refrigeration pipelines, and selecting solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0049] Controlling the 1+i group of solid-state refrigeration pipelines to power off after being powered on for a specified period of time, and after the 1+i group of solid-state refrigeration pipelines are powered off, selecting part or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines as the 2+i group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration, and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling the operation of the motor, wherein i is cyclically taken from 0 to 1 in sequence, I is a preset integer greater than 0, and when i is 0, the 1+i group of solid-state refrigeration pipelines is the 1st group of solid-state refrigeration pipelines.

[0050] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium. When the computer program is run on a computer, the computer executes the above method.

[0051] The invention adopting the above technical solution has the following advantages:

[0052] In the technical solution provided in the present application, the refrigeration system includes a controller, n solid-state refrigeration pipelines, a heat exchanger, a motor and an electronic valve group. The controller can select some of the solid-state refrigeration pipelines from the n solid-state refrigeration pipelines to be powered on, and control the electronic valve group to open the flow channels of some solid-state refrigeration pipelines, and close the flow channels of solid-state refrigeration pipelines that are not used for refrigeration, and control the operation of the motor to drive the heat exchange medium in the heat exchange circuit to circulate in the flow channels of the heat exchanger and the solid-state refrigeration pipelines used for refrigeration, thereby refrigerating. In this way, the refrigeration system can achieve refrigeration without a compressor or a condenser, which can avoid the noise generated by the operation of the compressor and is conducive to improving the user experience. In addition, the use of n solid-state refrigeration pipelines to replace the refrigeration function achieved by the cooperation of the compressor and the condenser can reduce the weight of the system and the space occupied by the system while meeting the refrigeration needs, which is conducive to the lightweight design of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present application may be further illustrated by the non-limiting embodiments provided in the accompanying drawings. It should be understood that the following drawings illustrate only certain embodiments of the present application and are therefore not to be construed as limiting the scope of the present application. It is understood that a person skilled in the art can derive other relevant drawings from these drawings without inventive effort.

[0054] Figure 1 This is a functional block diagram of the refrigeration system provided in an embodiment of the present application.

[0055] Figure 2 A schematic structural diagram of the refrigeration system provided in an embodiment of the present application.

[0056] Figure 3 This is one of the assembly structure diagrams of the electronic valve group and the refrigeration assembly provided in the embodiment of the present application.

[0057] Figure 4 This is the second schematic diagram of the assembly structure of the electronic valve group and the refrigeration assembly provided in an embodiment of the present application.

[0058] Figure 5 A schematic diagram of the structure of the solid-state refrigeration module provided in an embodiment of the present application.

[0059] Figure 6 Schematic diagram of the state change of polar materials when the solid-state refrigeration module provided in an embodiment of the present application is in operation.

[0060] Figure 7 This is a schematic diagram of the state of the heat exchange medium circulating when the refrigeration system provided in an embodiment of the present application is running.

[0061] Figure 8 This is a schematic structural diagram of the first container and the sealing plug provided in an embodiment of the present application.

[0062] Figure 9 This is a schematic diagram of the structure in which a first container is connected to a second container according to an embodiment of the present application.

[0063] Figure 10 This is a structural diagram of the second container and fan layout provided in an embodiment of the present application.

[0064] Figure 11 A flow chart of the control method provided in an embodiment of the present application.

[0065] Icons: 10-refrigeration system; 11-controller; 12-refrigeration assembly; 120-solid-state refrigeration pipeline; 121-solid-state refrigeration module; 1211-flow channel; 13-electronic valve group; 131-first valve group; 1311-first valve; 1312-first valve; 1313-first valve; 1314-first valve; 132-second valve group; 1321-second valve; 1322-second valve; 1323-second valve; 1324-second valve; 14-motor; 15-heat exchanger; 161-first container; 1611-expansion interface; 162-second container; 163-sealing plug; 1631-sealing foam layer; 1632-plug shell; 1633-plug knob; 1634-sealing clip-on structure; 172-second pipeline; 173-third pipeline; 181-fan. DETAILED DESCRIPTION

[0066] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts in the drawings or descriptions are numbered the same. Implementations not shown or described in the drawings are known to those of ordinary skill in the art. In the description of this application, the terms "first," "second," etc. are used solely to distinguish descriptions and are not to be construed as indicating or implying relative importance.

[0067] First embodiment

[0068] Please refer to Figures 1 to 7The present embodiment provides a refrigeration system 10, which may include a controller 11, a refrigeration assembly 12, a heat exchanger 15, a motor 14, and an electronic valve assembly 13. The refrigeration assembly 12 includes n solid-state refrigeration pipelines 120, where n is an integer greater than 1. For example, n may be 2, 3, 4, or the like. The number n of solid-state refrigeration pipelines 120 can be flexibly set according to actual conditions and is not specifically limited herein.

[0069] N solid-state refrigeration lines 120 are arranged in parallel and connected to the heat exchanger 15 to form a heat exchange circuit. The motor 14 and the electronic valve assembly 13 are disposed within the heat exchange circuit. This parallel arrangement facilitates alternating cooling cycles in the multiple solid-state refrigeration lines 120, enabling the refrigeration system 10 to continuously achieve its cooling function.

[0070] When the refrigeration system 10 is in operation, the controller 11 selects some of the n solid-state refrigeration pipelines 120 to power on based on the target control strategy, controls the electronic valve group 13 to open the flow channels 1211 of the solid-state refrigeration pipelines 120 used for refrigeration and close the flow channels 1211 of the solid-state refrigeration pipelines 120 not used for refrigeration, and controls the motor 14 to drive the heat exchange medium in the heat exchange circuit to circulate through the heat exchanger 15 and the flow channels 1211 of the solid-state refrigeration pipelines 120 used for refrigeration. The heat exchange medium can be a liquid with good thermal conductivity, such as water, diethylene glycol, ethylene glycol, thermal oil, etc.

[0071] Each solid-state refrigeration pipeline 120 includes one or more solid-state refrigeration modules 121 disposed in the tube body of the solid-state refrigeration pipeline 120. If a solid-state refrigeration pipeline 120 includes multiple solid-state refrigeration modules 121, the multiple solid-state refrigeration modules 121 are disposed in series.

[0072] Each solid-state refrigeration module 121 has a flow channel 1211 , which serves as a pipe / flow channel of the solid-state refrigeration pipeline 120 and is connected to the heat exchanger 15 for conveying a heat exchange medium.

[0073] Understandably, engineers can increase the refrigeration capacity of the refrigeration system 10 by increasing the number of solid-state refrigeration pipelines 120 connected in parallel and / or increasing the number of solid-state refrigeration modules 121 in a single solid-state refrigeration pipeline 120. The number of solid-state refrigeration pipelines 120 and the number of solid-state refrigeration modules 121 in a single solid-state refrigeration pipeline 120 can be flexibly set according to actual conditions.

[0074] The solid-state refrigeration module 121 includes a polar material disposed in the flow channel 1211. This polar material absorbs heat when powered on, or releases heat when powered on and absorbs heat after power is turned off. In this embodiment, the controller 11 can select the solid-state refrigeration module 121 in the solid-state refrigeration circuit 120 that needs to be operated / powered on. After the solid-state refrigeration module 121 is connected to the power supply, it undergoes polarization due to the characteristics of the polar material. The polar material can include positive polarity materials and negative polarity materials. The positive polarity material can absorb ambient heat after power is turned on, thereby enabling cooling during the power-on period. For example, the positive polarity material is a positive ferroelectric material, such as, but not limited to, a BaTiO3-based material or a (K0.5Na0.5)NbO3-based material. The negative polarity material can release heat to the environment after power is turned on and gradually return to ambient temperature. After the ambient temperature is restored, the power is turned off. During the power-off period, the material absorbs ambient heat, thereby enabling cooling during the power-off period. For example, the anti-polarity material may be an anti-ferroelectric material, such as, but not limited to, PbZrO 3 series materials, (Pb, La)(Zr, Sn, Ti)O 3 (PLZST) materials.

[0075] In this embodiment, the solid-state cooling module 121 has a zigzag flow channel 1211. The inner wall of the flow channel 1211 is lined with a positive polarity material that absorbs heat when powered on, or with a reverse polarity material that releases heat when powered on and absorbs heat when powered off. This zigzag design increases the length of the flow channel 1211 within a limited space, increasing the contact area between the heat exchange medium and the solid-state cooling module 121, thereby improving heat exchange efficiency.

[0076] In each solid-state refrigeration pipeline 120, the two ends of the pipe body can be used as the liquid inlet and liquid outlet of the heat exchange medium respectively. Figure 3 and Figure 5 , the two port portions can be respectively provided with a first valve and a second valve.

[0077] If the inner wall of the flow channel 1211 is provided with a positive polarity material, the solid-state refrigeration module 121 used for refrigeration is a powered solid-state refrigeration module 121 , and the solid-state refrigeration module 121 not used for refrigeration is a non-powered solid-state refrigeration module 121 .

[0078] If the inner wall of the flow channel 1211 is provided with a reverse polarity material, the solid-state refrigeration module 121 used for cooling is the solid-state refrigeration module 121 that is powered on and then powered off and is in the power-off period; the solid-state refrigeration module 121 not used for cooling is the solid-state refrigeration module 121 that is powered on.

[0079] The solid-state refrigeration pipeline 120 used for refrigeration contains one or more solid-state refrigeration modules 121 used for refrigeration. The solid-state refrigeration pipeline 120 not used for refrigeration may not contain any solid-state refrigeration module 121 used for refrigeration. In this way, the solid-state refrigeration pipeline 120 not used for refrigeration can avoid wasting electricity due to the presence of solid-state refrigeration modules 121 in the refrigeration state.

[0080] In this embodiment, the refrigeration process of the refrigeration system 10 is described by taking the case where the inner wall of the flow channel 1211 of the solid-state refrigeration module 121 is provided with a positive polarity material as an example. For example, when the polar material is powered on, the electric dipoles therein change from a disordered state to an ordered state, and the polar material absorbs ambient heat; when the solid-state refrigeration module 121 is powered off, the electric dipoles therein change from an ordered state to a disordered state, and the polar material releases heat to the surrounding environment. When the solid-state refrigeration module 121 is periodically powered on and off, the electric dipoles undergo a periodic change from disordered to ordered to disordered to ordered, and the polar material releases heat to the surrounding environment. When the solid-state refrigeration module 121 is periodically powered on and off, the electric dipoles undergo a periodic change from disordered to ordered to disordered to ordered, and the solid-state refrigeration module 121 also periodically absorbs and releases heat. By utilizing multiple solid-state refrigeration modules 121 to periodically absorb heat, the refrigeration function of the refrigeration system 10 is achieved.

[0081] Please refer to Figure 1 and Figure 2 The refrigeration system 10 may further include a first container 161 for placing refrigerated items. The heat exchanger 15 includes a first pipe attached to the first container 161, and the first pipe is connected to the flow channels of the n solid-state refrigeration pipelines 120. The first container 161 serves as the inner container of the refrigeration system 10 and can be used to store refrigerated items (such as beverages and food). The first pipe of the heat exchanger 15 can be spirally attached to the outer wall of the first container 161. This helps to increase the contact area between the heat exchanger 15 and the first container 161, thereby improving the refrigeration efficiency.

[0082] Please refer to Figure 3 As an example, if a solid-state refrigeration pipeline 120 includes only one solid-state refrigeration module 121, then this solid-state refrigeration module 121 is equivalent to a solid-state refrigeration pipeline 120. The electronic valve assembly 13 includes n sets of electronic valves, each of which includes a first valve and a second valve disposed at both ends of the flow channel of the corresponding solid-state refrigeration pipeline 120. These n sets of electronic valves facilitate independent opening and closing of each solid-state refrigeration pipeline 120, facilitating flexible adjustment of cooling power.

[0083] The electronic valve group 13 may include a first valve group and a second valve group, and the valves in the first valve group and the second valve group that are connected to the same solid-state refrigeration pipeline 120 serve as a group of electronic valves.

[0084] For example, see Figure 3In the first embodiment, the solid-state refrigeration pipeline 120 includes one solid-state refrigeration module 121. The first valve 1311 and the second valve 1321, as the first group of electronic valves, are arranged at both ends of the flow channel of the solid-state refrigeration module a; the first valve 1312 and the second valve 1322, as the second group of electronic valves, are arranged at both ends of the flow channel of the solid-state refrigeration module b; the first valve 1313 and the second valve 1323, as the third group of electronic valves, are arranged at both ends of the flow channel of the solid-state refrigeration module c; and the first valve 1314 and the second valve 1324, as the fourth group of electronic valves, are arranged at both ends of the flow channel of the solid-state refrigeration module d. The controller 11 can control each group of electronic valves to be opened at the same time, so that the flow channel of the corresponding solid-state refrigeration pipeline / solid-state refrigeration module is in an open state; or control each group of electronic valves to be closed at the same time, so that the flow channel 1211 of the corresponding solid-state refrigeration pipeline / solid-state refrigeration module is in a closed state.

[0085] As another example, please refer to Figure 4 In the second embodiment, the solid-state refrigeration pipeline 120 includes two solid-state refrigeration modules 121 arranged in series. In order to facilitate independent control of each solid-state refrigeration module, each solid-state refrigeration module can be distinguished by setting a corresponding number, as shown in Figure 3 or Figure 4 It should be noted that the number can be flexibly set according to actual conditions, and is not limited to the number shown in Figure 3 , Figure 4

[0086] The flow channel 1211 of the solid-state refrigeration module 121 can be, but is not limited to, a round pipe type flow channel 1211 and a flat pipe type flow channel 1211. In other embodiments, the flow channel 1211 can be a combination of a round pipe type flow channel 1211 and a flat pipe type flow channel 1211. As an example, the flow channel 1211 can be a flat pipe type flow channel 1211, so that the surface area of the polar material can be increased while the number of times of bending the pipeline back and forth is reduced.

[0087] In the present embodiment, a thin film formed of a polar material, such as a ferroelectric thin film, is arranged on the inner wall of the flow channel of the solid-state refrigeration pipeline 120 / solid-state refrigeration module 121. When a direct current voltage U is applied to the polar material with a thickness of d, an electric field strength E can be obtained.

[0088] According to the formula The thickness of the polar thin film material can be micron level. According to the theoretical basis of the calculation of the electrocaloric effect according to Maxwell's relationship, the electro-thermal temperature change △T of the polar material can be represented as:

[0089]

[0090] wherein ρ is the material density; D is the specific heat capacity of the polar material, P refers to the polarization intensity of the polar material; ρ is the material density,​ is the pyroelectric coefficient; E0 refers to the initial value of the electric field of the polar material; P refers to the polarization intensity of the polar material; T refers to the temperature of the polar material; and E refers to the electric field intensity of the polar material in the solid-state refrigeration pipeline 120.

[0091] When using a typical ferroelectric material, P(VDF-Tr FE-CFE) / BST, at 20°C and applying an electric field of 1000 kV / cm, the measured electrothermal temperature change was ΔT = 20°C. Therefore, as long as the applied electric field strength is high enough and a polar material with a high pyroelectric coefficient is selected, the ideal electrothermal temperature change can be achieved, enabling the refrigeration function of the refrigeration system 10.

[0092] Assuming the polar material has a mass of m0 and a specific heat capacity of C0, the amount of heat absorbed is CmΔT. That is, the polar material can absorb energy ξCmΔT from the heat exchange medium, where ξ is the thermal conductivity. The energy absorbed by n modules is Q0 = ξnCmΔT. The total cooling capacity of solid-state refrigeration circuit 120 is P0 = ξnCmΔT / Δt. For a specific polar material and solid-state refrigeration module 121, the electric field and polarity are known parameters.

[0093] The total cooling capacity of the n solid-state refrigeration pipelines 120 meets the following conditions:

[0094] P0≥P1

[0095] Wherein, P0 refers to the total cooling capacity of n solid-state refrigeration pipelines 120, P0 = ξγnm△T / (ρ△t) = ξγnV0△T / △t;

[0096] P1 refers to the required cooling capacity, P1 = Q 总 / △t;

[0097] Wherein, ξ is the heat transfer coefficient between the polar material in the flow channel 1211 and the heat exchange medium;

[0098] Emax refers to the maximum electric field applied to the polar material; E0 refers to the initial value of the electric field of the polar material; P refers to the polarization intensity of the polar material; T refers to the temperature of the polar material; E refers to the electric field intensity of the polar material in the solid-state refrigeration pipeline 120;

[0099] n refers to the number of solid-state refrigeration pipelines 120;

[0100] V0=Sd, S=LC, V0 refers to the volume of the polar material in the solid-state refrigeration pipeline 120; S refers to the coverage area of ​​the polar material in the flow channel of the solid-state refrigeration pipeline 120; d refers to the thickness of the polar material; L refers to the length of the flow channel provided with the polar material in the solid-state refrigeration pipeline 120; C refers to the circumference of the cross section of the polar material in the tube body of the solid-state refrigeration pipeline 120;

[0101] ΔT refers to the temperature drop of the stored object in the refrigeration system 10 within a time period of Δt when the ambient temperature is T0;

[0102] Q 总 Refers to the total required heat load of the refrigeration system 10,

[0103] Q 总 =Q 物 +Q air +Q 传 , Q 物 Refers to the heat load of the items stored in the refrigeration system 10, Q air Refers to the heat load of the air in the refrigerated space of the refrigeration system 10, Q 传 Refers to the heat load transferred from the environment to the refrigerated space;

[0104] The above condition P0≥P1 can be converted to ξγnLCd△T≥Q 总 When the flow channel of the solid-state refrigeration pipeline 120 is a circular tube-shaped flow channel, the circumference of the cross section of the flow channel C = 2πr, where r is the radius of the cross section of the flow channel. Therefore, the above condition P0 ≥ P1 can be converted to 2ξγnπrLdT ≥ Q 总 Therefore, the size and quantity of the solid-state refrigeration pipeline 120 / solid-state refrigeration module 121 can be designed based on the parameters n, L, and r to meet the total required heat load of the refrigeration system 10. This facilitates accurate calculation of the refrigeration power of the refrigeration system 10 before manufacturing the refrigeration system 10, avoiding waste caused by excessively high actual refrigeration power, or failure to meet user needs due to insufficient actual refrigeration power.

[0105] Assume that the refrigeration system 10 is a refrigerator, and the refrigerator performance requirement is that at an ambient temperature of T0°C, at a time of Δt, the water temperature drops by ΔT 物 It can be seen that Q 物 =D 物 m△T 物 , m is the mass of the refrigerated item (assuming the temperature distribution of the object is uniform), D 物 is the specific heat capacity of the refrigerated object. In this way, the required cooling capacity P1 = Q 总 / △t.

[0106] If a solid-state refrigeration pipeline 120 includes only one solid-state refrigeration module 121, to achieve system refrigeration, P0≥P1, that is, ξγnV0T≥Q 总. The number n of solid-state refrigeration pipelines 120 / solid-state refrigeration modules 121 can be selected, and the polar material is distributed on the inner wall of the flow channel 1211 of the solid-state refrigeration module 121. Assuming that the coverage area of ​​the polar material in the flow channel 1211 of a single solid-state refrigeration module 121 is S, its volume V0 = Sd, and the thickness d can be obtained by inspection and is usually a fixed value. In this way, the cooling capacity of the solid-state refrigeration module 121 will be related to the area S. Since the internal flow channel 1211 can be approximately regarded as a circular pipe, S = LC, L is the length of the flow channel 1211, C is the circumference of the cross section of the flow channel 1211, and C = 2πr, where r is the cross-sectional radius of the flow channel 1211, that is, 2ξγnπrLdT≥Q 总 .

[0107] The refrigeration efficiency COP is the ratio of the refrigeration capacity of the refrigeration assembly 12 to the power consumption, which can be expressed as: COP = Q0 / W, P is the material's polarization strength. For example, a polar material with a Ba doping ratio of 0.02 exhibits a COP greater than 1.7 at room temperature. This indicates that the refrigeration system 10 can achieve a COP greater than 1. Compared to conventional vehicle-mounted compressor refrigerators with a COP greater than 1.1, the refrigeration system 10 provided in this application achieves a higher COP than conventional compressor refrigerators.

[0108] In this embodiment, engineers have pre-established a correspondence between different temperature differences and control strategies through experiments, which facilitates dynamic adjustment of refrigeration power for different temperature differences. The temperature difference refers to the difference between the temperature in the first container (i.e., the first temperature) and the temperature set by the user (i.e., the second temperature). The control strategy includes control parameters, which include at least one of the number of operations of the solid-state refrigeration pipeline, the speed of the motor, and the valve opening of the electronic valve group. In the correspondence, the temperature difference is positively correlated with the number of operations, the speed, or the valve opening.

[0109] This correspondence can be a table or curve representing different temperature differences and corresponding control parameters. When the first temperature is greater than the second temperature, the greater the temperature difference, the more the solid-state refrigeration circuit operates, the faster the motor speed is, or the wider the valve opening in the electronic valve assembly is. This facilitates rapidly increasing refrigeration power when the temperature difference is large, thereby shortening the time it takes for the first temperature in the first container to drop to the user-set second temperature.

[0110] The target control strategy may be: the controller selects a control strategy corresponding to the current temperature difference based on a pre-established correspondence between the temperature difference and the control strategy. The current temperature difference is the difference between the current first temperature in the first container of the refrigeration system and the desired second temperature.

[0111] Understandably, the refrigeration system 10 can dynamically adjust the number of solid-state refrigeration circuits operating, the motor speed, and the valve opening in the electronic valve assembly based on the temperature difference to ensure that the first and second temperatures of the first container are equal or the difference is within a specified range, thereby achieving dynamic temperature control. The valve opening can be used to adjust the flow rate of the heat exchange medium. This helps improve the flexibility and adaptability of temperature regulation. The specified range can be a smaller temperature difference range, flexibly set according to actual conditions, such as ±0.5°C.

[0112] As an example, assume that the first temperature inside the first container is recorded as T1, the second temperature set by the user is recorded as T2, and the system voltage is recorded as U. Using the above correspondence, the motor speed S1, the number of solid-state refrigeration modules working X1, and the number of solid-state refrigeration pipelines opened by the electronic valve group Y1 when the refrigeration system 10 starts running are found / calculated, and the motor speed is increased to S2 at a certain frequency, the number of solid-state refrigeration pipelines opened is increased to Y2, and the number of solid-state refrigeration modules working is increased to X2. After the refrigeration system 10 has been running for a period of time (this period can be flexibly set according to actual conditions), during the process from temperature T1 to T2, if T1-T2≥A1, the motor speed is reduced at a certain frequency, the number of solid-state refrigeration pipelines opened by the water valve is reduced, and the number of solid-state refrigeration modules working is reduced; until T1-T2≤A2, the motor speed S3, the number of solid-state refrigeration pipelines opened Y3, and the number of solid-state refrigeration modules working X3 are maintained. Thus, through dynamic adjustment, the temperature inside the first container reaches the desired temperature T2. Among them, A1 is greater than A2, both are temperature thresholds, and can be flexibly set according to actual conditions.

[0113] In this embodiment, the target control strategy may be used to select a portion of suitable solid-state refrigeration pipelines from n solid-state refrigeration pipelines 120 for power-on, and then power off after a period of power-on, and repeatedly select a portion of suitable solid-state refrigeration pipelines for power-on to achieve a refrigeration cycle. Specifically, for solid-state refrigeration pipelines made of positive polarity materials, suitable solid-state refrigeration pipelines may be those whose temperature is close to the ambient temperature after releasing heat during the power-off period. For solid-state refrigeration pipelines made of negative polarity materials, suitable solid-state refrigeration pipelines may be those whose temperature is close to the ambient temperature after absorbing external heat during the power-off period.

[0114] As an optional implementation, the controller 11 may implement cyclic refrigeration based on the target control strategy in the following manner:

[0115] The controller 11 divides the n solid-state refrigeration pipelines 120 into p groups of solid-state refrigeration pipelines, and controls each group of solid-state refrigeration pipelines in the p groups to be powered on alternately in a set order and to operate cyclically, where 2≤p≤n, and p is an integer;

[0116] The controller 11 controls the electronic valve group 13 to open the flow channel 1211 of the solid-state refrigeration pipeline used for refrigeration, close the flow channel 1211 of the solid-state refrigeration pipeline not used for refrigeration, and controls the motor 14 to operate.

[0117] It is understood that the controller 11 can control each component in the refrigeration system 10 based on the control parameters carried by the target control strategy. The control parameters may include, but are not limited to, motor speed, the number of open solid-state refrigeration pipelines, the number of solid-state refrigeration modules in operation, the opening of the valves in the corresponding electronic valve group, etc.

[0118] In this embodiment, the number of solid-state refrigeration pipelines in each of the p groups can be the same or different, and is not specifically limited herein. Furthermore, the alternating power-on in a predetermined sequence can be performed alternately according to the sequence number of the groups, and the power-on and cyclic operation can be performed. This helps ensure that the cumulative operating time of each solid-state refrigeration pipeline is similar, thereby preventing some solid-state refrigeration pipelines from having excessive cumulative operating time, which could easily lead to abnormalities.

[0119] As an example, four solid-state refrigeration pipelines can be divided into two groups, each of which can have two solid-state refrigeration pipelines, which are respectively recorded as Group 1 and Group 2. Assuming that the solid-state refrigeration pipelines use positive polarity materials for cooling, they can be powered on alternately in a set order and cyclically operated in the following manner:

[0120] In step A1, the controller controls only the first group of solid-state refrigeration pipelines to be powered on, and the power is turned off after the power is turned on for a specified period of time. In addition, the controller also controls the electronic valve group to open the flow path of the first group of solid-state refrigeration pipelines and close the flow path of the second group of solid-state refrigeration pipelines, and controls the operation of the motor. The specified time period can be flexibly set according to actual conditions, and can be the time from the solid-state refrigeration pipeline being powered on to the time when it no longer absorbs heat after being powered on.

[0121] Step A2: After the first group of solid-state refrigeration pipelines loses power, only the second group of solid-state refrigeration pipelines is controlled to be powered on, and the power is kept on for a specified period of time before being powered off. In addition, the controller also controls the electronic valve group to open the flow path of the second group of solid-state refrigeration pipelines and close the flow path of the first group of solid-state refrigeration pipelines, and controls the operation of the motor;

[0122] Step A3: repeat steps A1 and A2 to cycle refrigeration.

[0123] It can be understood that controlling the power-on of the solid-state refrigeration pipeline can be understood as controlling the power-on of some or all solid-state refrigeration modules in the solid-state refrigeration pipeline. During the control process from steps A1 to A3, in each step, the controller also controls the electronic valve group to open the flow path of the solid-state refrigeration pipeline that is powered on in that step and close the flow path of the solid-state refrigeration pipeline that is not used for cooling, and continuously controls the operation of the motor, which provides power for the circulation of the heat exchange medium. In this way, the heat exchange medium can circulate through the heat exchanger and the flow path of the powered solid-state refrigeration pipeline. When the heat exchange medium flows through the powered solid-state refrigeration pipeline, its temperature decreases due to the heat absorption of the solid-state refrigeration pipeline. As the heat exchange medium circulates, the low temperature of the heat exchanger will reduce the temperature of the heat exchanger as it flows through the heat exchanger. The heat exchanger can then exchange heat with the objects in the refrigerated space of the refrigeration system 10, thereby cooling the stored objects. In addition, the heat exchange medium flowing out of the heat exchanger can re-enter the powered solid-state refrigeration pipeline, thereby performing circulating refrigeration.

[0124] As another example, six solid-state refrigeration pipelines can be divided into three groups, each of which can have two solid-state refrigeration pipelines, which are respectively recorded as Group 1, Group 2, and Group 3. If the solid-state refrigeration pipelines use positive polarity materials for cooling, they can be powered on alternately in a set order and cyclically operated in the following manner:

[0125] In step B1, the controller controls only the first group of solid-state refrigeration pipelines to be powered on, and keeps powered on for a specified period of time before being powered off. In addition, the controller also controls the electronic valve group to open the flow path of the first group of solid-state refrigeration pipelines, and to close the flow paths of the second and third groups of solid-state refrigeration pipelines, and controls the operation of the motor;

[0126] Step B2: After the first group of solid-state refrigeration pipelines loses power, only the second group of solid-state refrigeration pipelines is controlled to be powered on, and the power is kept on for a specified period of time before being powered off. In addition, the controller also controls the electronic valve group to open the flow path of the second group of solid-state refrigeration pipelines, and close the flow paths of the first and third groups of solid-state refrigeration pipelines, and controls the operation of the motor;

[0127] Step B3: After the second group of solid-state refrigeration pipelines loses power, only the third group of solid-state refrigeration pipelines is controlled to be powered on, and the power is kept on for a specified period of time before being powered off. In addition, the controller also controls the electronic valve group to open the flow path of the third group of solid-state refrigeration pipelines and close the flow paths of the first and second groups of solid-state refrigeration pipelines, and controls the operation of the motor;

[0128] Step B4, repeating steps B1 and B3, thereby performing a refrigeration cycle.

[0129] When there are a large number of solid-state refrigeration pipes, and if each has the same cooling capacity, the cooling capacity of the refrigeration system 10 can be adjusted by adjusting the number of solid-state refrigeration pipes in a single group. Specifically, the controller can determine the number of solid-state refrigeration pipes in each group and the value of the group number p based on the currently required cooling capacity. The greater the number of solid-state refrigeration pipes in a single group, the greater the cooling capacity. To minimize the impact of heat dissipation from the solid-state refrigeration pipes on the cooling capacity of the powered-on solid-state refrigeration pipes after a power outage, the powered-on solid-state refrigeration pipes in each group are positioned adjacent to each other.

[0130] As an optional implementation, the controller may implement cyclic refrigeration based on the target control strategy in the following manner:

[0131] The controller randomly selects some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines as a first group of solid-state refrigeration pipelines, and selects the solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0132] Controlling the 1+i group of solid-state refrigeration pipelines to power off after being powered on for a specified period of time, and after the 1+i group of solid-state refrigeration pipelines are powered off, selecting part or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines as the 2+i group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration, and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling the operation of the motor, wherein i is cyclically taken from 0 to 1 in sequence, I is a preset integer greater than 0, and when i is 0, the 1+i group of solid-state refrigeration pipelines is the 1st group of solid-state refrigeration pipelines.

[0133] In this embodiment, the sequential cycle of i from 0 to 1 can be understood as follows: i takes on the values ​​0, 1, ..., 1, and then takes on the values ​​0, 1, ..., 1 again, and so on. The intermediate variable i does not increment indefinitely but is limited by a preset integer I. This prevents the management and control of the solid-state refrigeration pipeline from being adversely affected by excessively large values ​​of the intermediate variable i. I can be flexibly set based on actual conditions.

[0134] As an example, I takes a value of 2, and i is cyclically changed from 0 to 2. The corresponding step of "controlling the 1+i groups of solid-state refrigeration pipelines to be powered on for a specified period of time and then powered off, and after the 1+i groups of solid-state refrigeration pipelines are powered off, selecting some or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines to serve as the 2+i groups of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i groups of solid-state refrigeration pipelines" may be implemented as follows:

[0135] Step C1: Controlling the first group of solid-state refrigeration pipelines to be powered on for a specified period of time and then powered off. After the first group of solid-state refrigeration pipelines are powered off, select some or all of the candidate solid-state refrigeration pipelines as the second group of solid-state refrigeration pipelines, and update the candidate solid-state refrigeration pipelines to the solid-state refrigeration pipelines excluding the second group of solid-state refrigeration pipelines.

[0136] Step C2: Controlling the second group of solid-state refrigeration pipelines to be powered on for a specified period of time and then powered off. After the second group of solid-state refrigeration pipelines are powered off, select some or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines to serve as a third group of solid-state refrigeration pipelines, and update the candidate solid-state refrigeration pipelines to the solid-state refrigeration pipelines excluding the third group of solid-state refrigeration pipelines.

[0137] Step C3: Controlling the third group of solid-state refrigeration pipelines to be powered on for a specified period of time and then powered off. After the third group of solid-state refrigeration pipelines is powered off, select some or all of the candidate solid-state refrigeration pipelines as the fourth group of solid-state refrigeration pipelines, and update the candidate solid-state refrigeration pipelines to the solid-state refrigeration pipelines excluding the fourth group of solid-state refrigeration pipelines.

[0138] In step C4, the fourth group of solid-state refrigeration pipelines is used as the first group of solid-state refrigeration pipelines in a new round, and steps C1 to C3 are repeated.

[0139] Some solid-state refrigeration pipelines are randomly selected for refrigeration, and the number of selected solid-state refrigeration pipelines is more flexible, which is conducive to flexible adjustment of refrigeration power.

[0140] When selecting a solid-state refrigeration pipeline for cooling, for positive polarity materials, since the solid-state refrigeration pipeline that has just been powered off will release heat, the temperature of the solid-state refrigeration pipeline will first rise after power failure and be higher than the ambient temperature, and then cool down to approach the ambient temperature. Therefore, a solid-state refrigeration pipeline that is close to the ambient temperature and has been powered off is usually selected as the solid-state refrigeration pipeline that is subsequently powered on and used for cooling.

[0141] Similarly, for reverse polarity materials, since the solid-state refrigeration pipeline that has just been powered on will release heat, the temperature of the solid-state refrigeration pipeline will first rise after power-on and be higher than the ambient temperature, and then cool down and approach the ambient temperature over time. Therefore, a solid-state refrigeration pipeline that is close to the ambient temperature and has been powered on is usually selected as the solid-state refrigeration pipeline that is subsequently powered off and used for cooling.

[0142] Please refer to Figure 5The solid-state refrigeration module has a flow channel for the heat exchange medium to flow, and the flow channel can be arranged in a back-and-forth bend. In addition, the number of flow channels can be one or more, and multiple flow channels can be arranged in parallel or stacked to increase the contact area between the heat exchange medium and the solid-state refrigeration module core. The specific design and selection of the number of solid-state refrigeration pipelines / solid-state refrigeration modules, flow channel area, flow channel length, and flow channel cross-sectional radius can be based on the aforementioned conditions ξγnLCd△T≥Q 总 Make a design.

[0143] In this embodiment, the core of the solid-state refrigeration module in the solid-state refrigeration pipeline is provided with polar materials. After connecting to high voltage, polarization phenomenon will occur, and periodic heat absorption and heat release will occur during the power on and off process. The solid-state refrigeration module uses the refrigeration process of reverse polarity materials, which can be referred to Figure 6 .exist Figure 6 First, from Figure 6 (A) At the beginning, the solid-state refrigeration module is in the power-off state, and the electric dipoles in the polar material of the solid-state refrigeration module core are in a disordered state. Assume that the temperature is T0 and the heat is Q0. Further, the controller controls the corresponding switch to close, the loop is connected, the solid-state refrigeration pipeline core is polarized, and the electric dipole changes from a disordered state to an ordered state. Figure 6 (B) During this process, the core temperature of the solid-state refrigeration module rises to T0+ΔT; further, the high voltage is kept on and the electric field is maintained, and the solid-state refrigeration module core dissipates heat to the environment until the core temperature drops to the ambient temperature T 0， Reference Figure 6 (C); Further, the controller controls the switch to be disconnected. At this time, the power supply circuit of the solid-state refrigeration module is disconnected. The solid-state refrigeration module is in the power-off state. The electric dipoles in the core polar material return from the ordered state to the disordered state, and the core temperature decreases by ΔT. Figure 6 (D); Furthermore, the core of the solid-state refrigeration module contacts the heat exchange medium, and the core of the solid-state refrigeration module absorbs the heat of the liquid, the temperature rises ΔT, and returns to the temperature T0; this reciprocating cycle realizes the refrigeration of the inner tank of the refrigeration system.

[0144] Please refer to Figure 6 and Figure 7 Under the control of the controller, the solid-state refrigeration pipeline starts to work. The controller controls the opening and closing of the first valve and the second valve at both ends of the flow channel of the corresponding solid-state refrigeration pipeline, selects the solid-state refrigeration pipeline to participate in refrigeration and performs refrigeration work. The heat exchange medium inside the flow channel exchanges heat with the polar material of the solid-state refrigeration pipeline. At this time, the solid-state refrigeration module in the solid-state refrigeration pipeline will perform Figure 6The working process of A→B→C→D→A shown in the figure can achieve the purpose of absorbing heat from the heat exchange medium for cooling. Furthermore, under the action of the motor (liquid pump), the heat exchange medium cooled by the solid-state refrigeration pipeline flows out of the solid-state refrigeration pipeline, flows through the motor, and flows into the heat exchanger. Furthermore, the heat exchange medium exchanges heat with the first container in the heat exchanger and flows out of the heat exchanger. The heat exchange medium flow channel is spirally arranged around the outer wall of the container, which can increase the heat exchange area and improve the heat exchange performance. During this heat exchange process, the heat exchanger absorbs the heat of the first container, completing a cycle of cooling. Further, the heat exchange medium after heat exchange flows out of the heat exchanger and then flows into the corresponding solid-state refrigeration pipeline. Under the action of the controller, the corresponding first valve and second valve are controlled to open, and the appropriate solid-state refrigeration pipeline is selected for cooling, while the solid-state refrigeration pipeline that participated in the last refrigeration enters the heat dissipation process. This reciprocating operation can continuously remove the heat load of the first container, thereby completing the cooling.

[0145] In this embodiment, an electronic valve group is used to regulate the flow channels and flow rates of the integrated solid-state refrigeration modules, enabling the refrigeration system to have multiple flow channels in parallel and the ability to freely select and switch between multiple channels. When the system is operating, the first valve group of the electronic valve group selects the liquid heat exchange medium to enter the flow channels of a certain number of solid-state refrigeration modules, such as solid-state refrigeration modules 1, 2, 3, etc.; then the second valve group opens the corresponding flow channels, allowing the liquid medium to flow out of the solid-state refrigeration modules, thereby achieving multi-flow channel parallel refrigeration. The cooling capacity of each independent solid-state refrigeration module is Q1 = cm1Δt, so the cooling capacity of i parallel refrigeration modules is Q' = icm1Δt. The flow channel of each solid-state refrigeration module folds back and forth in the solid-state refrigeration pipeline to increase the flow channel heat exchange area. The shape of the flow channel can be, but is not limited to, multiple S-shaped flow channels, U-shaped flow channels, and spiral ring flow channels.

[0146] In addition, when multiple solid-state refrigeration modules are connected in series on a single solid-state refrigeration pipeline, the refrigeration system has a multi-stage solid-state refrigeration module series cooling mode. The number of cooling levels can be the number of solid-state refrigeration modules connected in series on a single solid-state refrigeration pipeline. The number of cooling levels is ≥ 2. This helps to enhance the cooling capacity of the solid-state refrigeration mode assembly and facilitates the refined implementation of different levels of cooling. The maximum cooling power of the refrigeration system is the cooling power when all solid-state refrigeration modules are powered on. It should be noted that continuous cooling is not possible when all solid-state refrigeration modules are powered on.

[0147] Please refer to Figure 8 、 Figure 9 and Figure 10 , Figure 8 (A) is a schematic diagram of the expansion interface 1611 of the first container 161 after being blocked by the sealing plug 163. Figure 8(B) is a schematic diagram of the sealing plug 163. As an optional embodiment, the first container 161 is provided with an expansion port 1611. The refrigeration system 10 may also include a second container 162, which communicates with the first container 161 via the expansion port 1611. By utilizing the expansion port 1611 in conjunction with the second container 162, the refrigeration system 10 can expand its refrigerated space, meeting user needs for larger volumes.

[0148] Please refer again Figure 8 As an optional embodiment, the refrigeration system 10 may further include a sealing plug 163. When the expansion interface 1611 is not connected to the second container 162, the sealing plug 163 is used to seal the expansion interface 1611. The sealing plug 163 may include a sealing foam layer 1631, a plug shell 1632, a plug knob 1633 and a sealing clip structure 1634. The sealing clip structure 1634 may serve as a locking tongue, and the other end of the locking tongue may be engaged with the plug knob 1633 through a gear. The plug shell 1632 may fix and restrict the sealing foam layer 1631, the plug knob 1633 and the sealing clip structure 1634. The user may operate the plug knob 1633 in a forward / reverse direction to achieve the extension and retraction of the locking tongue. The first container 161 is provided with a locking hole that engages with the sealing engaging structure 1634. By extending and retracting the locking tongue and cooperating with the locking hole, the sealing plug 163 and the expansion interface 1611 can be sealed and removed. The sealing foam layer 1631 can improve the airtightness of the expansion interface 1611 and can also provide a heat-insulating seal.

[0149] It is understood that when the user does not need to connect a second container 162 to the first container 161, the sealing plug 163 will block the expansion port 1611 on the first container 161, thereby insulating and sealing the first container 161. When it is necessary to connect a second container 162 to the first container 161, the sealing plug 163 can be removed and then connected to the first container 161. The sealing plug 163 can be used to block the expansion port 1611, including but not limited to a knob, a press-fit connection, a button, a spring clip, etc. The method of removing the sealing plug 163 is the opposite of the method of sealing it, and will not be further described here.

[0150] Please refer to Figure 10 As an optional embodiment, the refrigeration system 10 may further include a second pipe 172 and a third pipe 173 connecting the first container 161 and the second container 162. The expansion port 1611 includes through holes corresponding to the second pipe 172 and the third pipe 173. A fan 181 is provided in the second pipe 172 and / or the third pipe 173. For example, if the third pipe 173 is provided with a fan 181, the second pipe 172 does not need to be provided with a fan 181, thereby reducing the number of fans 181 and lowering costs.

[0151] The second pipeline 172 and the third pipeline 173 can serve as a passage for the air internal circulation in the first container 161 and the second container 162, and the fan 181 can provide power for the air internal circulation when the fan 181 is running, so that the cold air in the first container 161 can quickly enter the second container 162, and the air in the second container 162 can enter the first container 161, that is, the second container 162 can also quickly achieve refrigeration. In this way, the second container 162 can also achieve the cold storage function without setting a solid-state refrigeration pipeline, which is conducive to saving the hardware cost of the system.

[0152] It should be noted that the second container 162 is provided with a heat preservation layer, and the heat preservation material of the heat preservation layer can be selected flexibly according to actual conditions, which has the function of heat insulation and heat preservation.

[0153] In the embodiment, the number of the second container 162 can be one or more. When the number of the second container 162 is more, the expansion interface 1611 on the first container 161, the second pipeline 172, the third pipeline 173, the fan 181 and the sealing plug 163 can be increased in a matched manner.

[0154] In the embodiment, the single solid-state refrigeration pipeline 120 can be a sheet structure or a plate structure, and the solid-state refrigeration pipeline 120 has a flow channel that is folded back and forth. The flow channel of the solid-state refrigeration pipeline 120 can be understood as being composed of the flow channel 1211 of the solid-state refrigeration module 121. The structure of the single solid-state refrigeration module 121 is similar to that of the solid-state refrigeration pipeline 120, and can also be a sheet structure or a plate structure 1. The n solid-state refrigeration pipelines 120 are arranged in a stacked manner, so as to form the refrigeration assembly 12. In this way, through integrated design, it is conducive to reducing the envelope area of the refrigeration assembly 12, and conducive to reducing the occupied space of the refrigeration system 10.

[0155] In the embodiment, the motor is a device for providing flow power to the heat exchange medium, which can be a liquid pump or other electric pump, which is not specifically limited here.

[0156] Based on the above design, the refrigeration system 10 provided in this application, when used as a vehicle refrigerator, offers significant size advantages over conventional compressor vehicle refrigerators. This refrigeration system 10 eliminates the compressor, condenser, and fan. Due to the differences in the solutions, the refrigeration system 10 uses an integrated solid-state refrigeration module in place of the compressor, condenser, and fan, resulting in a smaller footprint. Compared to conventional refrigerators of the same volume, this refrigeration system 10 facilitates the design of larger storage spaces, better meeting vehicle requirements. The refrigeration system 10 has a great advantage in weight compared to traditional compressor car refrigerators. Traditional compressor car refrigerators weigh more than 10kg, and the main weight is concentrated in the compressor and condenser. The weight of these two components is more than 5kg. Under the condition of the same refrigeration power demand, the weight of the refrigeration assembly of the refrigeration system 10 is much less than 5kg, so it can reduce the total weight of the system and the load of the entire vehicle, thereby reducing the energy consumption of the entire vehicle and improving the cruising range of new energy vehicles; in addition, compared with traditional compressor refrigerators, when working, the noise is more than 32db when it is 1m away from the compressor, while this application only uses the noise generated when the motor is running, and its noise is much smaller than the noise of the compressor at the same distance, which can further improve driving comfort.

[0157] Second embodiment

[0158] The present application also provides a vehicle, which may include a vehicle body and the aforementioned refrigeration system 10. The refrigeration system 10 can function as a vehicle refrigerator and can be installed in the vehicle's cabin, trunk, or other locations. The vehicle's inclusion of the aforementioned refrigeration system 10 helps reduce noise during operation of the vehicle refrigerator, facilitates a lightweight design for the refrigerator, and enhances the user experience.

[0159] Third embodiment

[0160] Please refer to Figure 11 , the present application also provides a control method, which can be applied to the above-mentioned refrigeration system 10.

[0161] The control method may include the following steps:

[0162] Step 210 selects some solid-state refrigeration pipelines from n solid-state refrigeration pipelines and powers them on based on the target control strategy, where n is an integer greater than or equal to 2;

[0163] In step 220, the electronic valve group is controlled to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the motor is controlled to drive the heat exchange medium in the heat exchange circuit to circulate in the heat exchanger and the flow channel of the solid-state refrigeration pipeline used for refrigeration.

[0164] As an optional implementation, before step 210, the method may further include:

[0165] Based on a pre-established correspondence between temperature differences and control strategies, a control strategy corresponding to the current temperature difference is selected as the target control strategy, wherein the current temperature difference is the difference between the current first temperature and the desired second temperature in the first container of the refrigeration system, and the control parameters in the control strategy include at least one of the working number of the solid-state refrigeration pipeline, the speed of the motor, and the valve opening in the electronic valve group.

[0166] In the corresponding relationship, the temperature difference is positively correlated with the working quantity of the solid-state refrigeration pipeline, or the rotation speed of the motor, or the valve opening in the electronic valve group.

[0167] As an optional implementation, step 210 may include:

[0168] Divide the n solid-state refrigeration pipelines into p groups of solid-state refrigeration pipelines, and control each group of solid-state refrigeration pipelines in the p groups to be alternately powered on and cyclically operated in a set order, wherein 2≤p≤n, and p is an integer;

[0169] The electronic valve group is controlled to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

[0170] As an optional implementation, step 210 may include:

[0171] Randomly selecting some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines as a first group of solid-state refrigeration pipelines, and selecting solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0172] Controlling the 1+i group of solid-state refrigeration pipelines to power off after being powered on for a specified period of time, and after the 1+i group of solid-state refrigeration pipelines are powered off, selecting part or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines as the 2+i group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration, and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling the operation of the motor, wherein i is cyclically taken from 0 to 1 in sequence, I is a preset integer greater than 0, and when i is 0, the 1+i group of solid-state refrigeration pipelines is the 1st group of solid-state refrigeration pipelines.

[0173] It should be noted that those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the control method described above can refer to the corresponding operating process of each component in the aforementioned refrigeration system 10, and will not be elaborated here.

[0174] In the refrigeration system 10, the controller can be an integrated circuit chip having signal processing capability. For example, the controller can be a body controller, a central processing unit (CPU), a digital signal processing (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0175] Fourth embodiment

[0176] The embodiments of the present application also provide a computer readable storage medium. The computer readable storage medium stores a computer program. When the computer program is run on a computer, the computer executes the control method as described in the above embodiments.

[0177] Through the above description of the embodiments, those skilled in the art can clearly understand that the present application can be implemented by hardware, or by means of software and a necessary general hardware platform. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.), and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various implementation scenarios of the present application.

[0178] In the embodiments of the present disclosure, it should be understood that the disclosed system and method can also be implemented in other ways. The system and method embodiments described above are only illustrative, for example, the flowcharts and block diagrams in the drawings show the possible implementation architecture, function and operation of the system, method and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram can represent a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a special hardware-based system for performing the specified function or action, or can be implemented by a combination of special hardware and computer instructions. In addition, the functional modules in the various embodiments of the present disclosure can be integrated together to form a separate part, or each module can exist independently, or two or more modules can be integrated to form a separate part.

[0179] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A refrigeration system, characterized in that: The refrigeration system includes: a controller, n solid-state refrigeration pipelines, a heat exchanger, a motor and an electronic valve group, wherein n is an integer greater than or equal to 2; The n solid-state refrigeration pipelines are arranged in parallel and communicated with the heat exchanger to form a heat exchange circuit, and the motor and the electronic valve group are arranged in the heat exchange circuit; When the refrigeration system is in operation, the controller selects, based on a target control strategy, some of the n solid-state refrigeration pipelines to be powered on, controls the electronic valve group to open the flow passages of the solid-state refrigeration pipelines used for refrigeration and close the flow passages of the solid-state refrigeration pipelines not used for refrigeration, and controls the motor to operate so as to drive the heat exchange medium in the heat exchange circuit to circulate in the heat exchanger and the flow passages of the solid-state refrigeration pipelines used for refrigeration; The target control strategy is: the controller selects a control strategy corresponding to a current temperature difference based on a pre-established correspondence between temperature differences and control strategies; the current temperature difference is the difference between a current first temperature and a desired second temperature in the first container of the refrigeration system; the control parameters in the control strategy include at least one of the number of operations of the solid-state refrigeration pipeline, the speed of the motor, and the valve opening of the electronic valve group; The target control strategy includes: Divide the n solid-state refrigeration pipelines into p groups of solid-state refrigeration pipelines, and control each group of solid-state refrigeration pipelines in the p groups to be alternately powered on and cyclically operated in a set order, wherein 2≤p≤n, and p is an integer; The electronic valve group is controlled to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

2. The refrigeration system according to claim 1, characterized in that The temperature difference is positively correlated with the work quantity, the rotation speed, or the valve opening.

3. The refrigeration system according to claim 1, characterized in that The target control strategy includes: Randomly selecting some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines as a first group of solid-state refrigeration pipelines, and selecting solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines; Controlling the 1+i group of solid-state refrigeration pipelines to power off after being powered on for a specified period of time, and after the 1+i group of solid-state refrigeration pipelines are powered off, selecting part or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines as the 2+i group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration, and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling the operation of the motor, wherein i is cyclically taken from 0 to 1 in sequence, I is a preset integer greater than 0, and when i is 0, the 1+i group of solid-state refrigeration pipelines is the 1st group of solid-state refrigeration pipelines.

4. The system according to claim 1, wherein: The solid-state refrigeration pipeline includes one or more solid-state refrigeration modules connected in series and arranged in a pipe body of the solid-state refrigeration pipeline.

5. The refrigeration system according to claim 4, characterized in that The total cooling capacity of the n solid-state refrigeration pipelines meets the following conditions: P0≥P1 Wherein, P0 refers to the total cooling capacity of the n solid-state refrigeration pipelines, P0 = ξγnV0ΔT / Δt, where ξ is the thermal conductivity between the polar material in the solid-state refrigeration module and the heat exchange medium; the polar material is used to absorb heat when powered on, or release heat when powered on and absorb heat after power is off; Emax refers to the maximum electric field applied to the polar material; E0 refers to the initial value of the electric field of the polar material; P refers to the polarization intensity of the polar material; T refers to the temperature of the polar material; E refers to the electric field intensity of the polar material in the solid-state refrigeration pipeline; n refers to the number of solid-state refrigeration pipelines; V0=Sd, S=LC, V0 refers to the volume of the polar material in the solid-state refrigeration pipeline; S refers to the coverage area of ​​the polar material in the flow channel of the solid-state refrigeration pipeline; d refers to the thickness of the polar material; L refers to the length of the flow channel of the solid-state refrigeration pipeline; C refers to the circumference of the cross section of the polar material in the tube body; ΔT refers to the temperature drop of the stored object in the refrigeration system within a time period of Δt when the ambient temperature is T0; P1 refers to the required cooling capacity; P1=Q 总 / △t; Q 总 is the total required heat load of the refrigeration system, Q 总 =Q 物 +Q air +Q 传 , Q 物 Refers to the heat load of the items stored in the refrigeration system, Q air Refers to the heat load of the air in the refrigerated space of the refrigeration system, Q 传 Refers to the heat load transmitted from the environment to the refrigerated space; The condition P0≥P1 is converted to ξγnLCd△T≥Q 总 .

6. The refrigeration system according to claim 1, characterized in that The refrigeration system further includes a first container for placing refrigerated items, and the heat exchanger includes a first pipe attached to the first container, and the first pipe is connected to the flow channels of the n solid-state refrigeration pipelines.

7. The refrigeration system according to claim 6, characterized in that The first container is provided with an expansion interface, and the refrigeration system further includes a second container connected to the first container via the expansion interface.

8. The refrigeration system according to claim 7, characterized in that The refrigeration system further includes a second pipe and a third pipe communicating with the first container and the second container, and a fan is provided in the second pipe and / or the third pipe.

9. The refrigeration system according to claim 7, characterized in that The refrigeration system further includes a sealing plug, which is used to seal the extension interface when the extension interface is not connected to the second container.

10. The refrigeration system according to any one of claims 1 to 9, characterized in that: The electronic valve group includes n groups of electronic valves, and each group of the n groups of electronic valves includes a first valve and a second valve arranged at two ends of a flow channel of a corresponding solid-state refrigeration pipeline.

11. The refrigeration system according to any one of claims 1 to 9, characterized in that: The solid-state refrigeration pipeline has a flow channel that bends back and forth, and n solid-state refrigeration pipelines are stacked.

12. A vehicle, characterized in that: The vehicle includes a vehicle body and a refrigeration system according to any one of claims 1 to 11.

13. A control method, characterized in that: Applied to the refrigeration system according to any one of claims 1 to 11, the control method comprises: Based on a pre-established correspondence between temperature differences and control strategies, a control strategy corresponding to a current temperature difference is selected as a target control strategy, wherein the current temperature difference is a difference between a current first temperature in a first container in the refrigeration system and a desired second temperature, and a control parameter in the control strategy includes at least one of the number of working units of a solid-state refrigeration pipeline, a rotational speed of a motor, and a valve opening in an electronic valve group; Based on the target control strategy, some solid-state refrigeration pipelines are selected from n solid-state refrigeration pipelines to be powered on, where n is an integer greater than or equal to 2; Controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling the operation of the motor to drive the heat exchange medium in the heat exchange circuit to circulate in the heat exchanger and the flow channel of the solid-state refrigeration pipeline used for refrigeration; Part of the solid-state refrigeration pipelines is selected from the n solid-state refrigeration pipelines and powered on based on the target control strategy, including: Divide the n solid-state refrigeration pipelines into p groups of solid-state refrigeration pipelines, and control each group of solid-state refrigeration pipelines in the p groups to be alternately powered on and cyclically operated in a set order, wherein 2≤p≤n, and p is an integer; The electronic valve group is controlled to open the flow channel of the solid-state refrigeration pipeline used for refrigeration and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

14. The control method according to claim 13, characterized in that: The temperature difference is positively correlated with the work quantity, the rotation speed, or the valve opening.

15. The control method according to claim 13, characterized in that: Based on the target control strategy, some solid-state refrigeration pipelines are selected from n solid-state refrigeration pipelines to be powered on, including: Randomly selecting some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines as a first group of solid-state refrigeration pipelines, and selecting solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines; Controlling the 1+i group of solid-state refrigeration pipelines to power off after being powered on for a specified period of time, and after the 1+i group of solid-state refrigeration pipelines are powered off, selecting part or all of the solid-state refrigeration pipelines from the candidate solid-state refrigeration pipelines as the 2+i group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration, and close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling the operation of the motor, wherein i is cyclically taken from 0 to 1 in sequence, I is a preset integer greater than 0, and when i is 0, the 1+i group of solid-state refrigeration pipelines is the 1st group of solid-state refrigeration pipelines.

16. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is run on a computer, the computer is enabled to execute the control method according to any one of claims 13 to 15.

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