Refrigeration system, vehicle, control method and storage medium

Abstract

The invention provides a refrigeration system, a vehicle, a control method and a storage medium. The refrigeration system comprises a controller, n solid-state refrigeration pipelines, a heat exchanger, a motor and an electronic valve group. The controller can select part of the solid-state refrigeration pipelines from the n solid-state refrigeration pipelines to be powered on, control the electronic valve set to open flow channels of part of the solid-state refrigeration pipelines and close flow channels of the solid-state refrigeration pipelines which are not used for refrigeration. And the motor is controlled to operate to drive the heat exchange medium in the heat exchange loop to circularly flow in the heat exchanger and the flow channel of the solid-state refrigeration pipeline for refrigeration, so that refrigeration is achieved. Thus, the refrigeration system can achieve refrigeration without a compressor and a condenser, noise generated by operation of the compressor can be avoided, and the user experience can be improved. In addition, the refrigeration requirement can be met, meanwhile, the weight of the system is reduced, the size of the system is reduced, and lightweight design of the system is facilitated.

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] With the increasing demand for daily refrigeration by users, the application scenarios of refrigeration systems are becoming more and more extensive. For example, refrigerators are gradually installed in cars from home use, and the emergence of car refrigerators further meets 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 produce large vibrations and noises when working, which affects the user experience. In addition, compressors, condensers, and fans 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 refrigeration. 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 problems of high refrigeration noise and disadvantageous lightweight design.

[0004] In order 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 loop, and the motor and the electronic valve group are arranged in the heat exchange loop;

[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 motor to operate 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 combination with the first aspect, in some optional implementations, 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 work quantity, or the rotation 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 powered on alternately in a set order and to run cyclically, 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 to 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 taking the solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0017] Control 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, select 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 update the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and control 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 control the operation of the motor, wherein i is cyclically taken from 0 to I 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 combination with the first aspect, in some optional implementations, the total refrigeration capacity of the n solid-state refrigeration pipelines satisfies the following conditions:

[0020] P 0 ≥P 1

[0021] Where P 0 Refers to the total cooling capacity of the n solid-state refrigeration pipelines, P 0 =ξγnV 0 △T / △t, 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 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 the solid-state refrigeration pipelines;

[0024] V 0 =Sd, S = LC, V 0 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] △T refers to the storage object of the refrigeration system at an ambient temperature of T 0 , the temperature decreases within a time period of △t;

[0026] P 1 Refers to the required cooling capacity;

[0027] P 1 =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] Condition P 0 ≥P 1 Convert 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 the 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, and when the extension interface is not connected to the second container, the sealing plug is used to seal the extension interface.

[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 a flow channel of a 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 some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines to be powered on based on the target control strategy, the method further includes:

[0042] Based on the pre-established correspondence between the temperature difference and the control strategy, 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 in the first container in the refrigeration system and the expected second temperature, and the control parameters in the control strategy include at least one of the working number of the solid-state refrigeration pipeline, the rotation 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 work quantity, or the rotation speed, or the valve opening.

[0044] In combination 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 powered on alternately in a set order and to run cyclically, 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 to close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

[0047] In combination 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 taking the solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0049] Control 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, select 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 update the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and control 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 control the operation of the motor, wherein i is cyclically taken from 0 to I 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 executed 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 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 heat exchanger and the flow channels of 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 described by the non-limiting embodiments given in the accompanying drawings. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings may be obtained based on these drawings without creative effort.

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

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

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

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

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

[0059] Figure 6 A 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 A schematic diagram of the state of the circulating flow of the heat exchange medium when the refrigeration system provided in an embodiment of the present application is in operation.

[0061] Figure 8 A schematic diagram of the structure of the first container and the sealing plug provided in an embodiment of the present application.

[0062] Fig. 9 A schematic diagram of the structure in which a first container is connected to a second container provided in an embodiment of the present application.

[0063] Fig.10 A schematic diagram of the structure of the second container and the fan layout provided in an embodiment of the present application.

[0064] Fig.11 A flow chart of a 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 clamping structure; 172-second pipeline; 173-third pipeline; 181-fan. DETAILED DESCRIPTION

[0066] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions, similar or identical parts use the same figure numbers, and the implementation methods not shown or described in the drawings are forms known to ordinary technicians in the relevant technical field. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0067] First embodiment

[0068] Please refer to Figures 1 to 7 The embodiment of the present application 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 group 13. The refrigeration assembly 12 includes n solid refrigeration pipelines 120, where n is an integer greater than 1, for example, n may be 2, 3, 4, etc. The number n of the solid refrigeration pipelines 120 may be flexibly set according to actual conditions, and is not specifically limited here.

[0069] N solid-state refrigeration pipelines 120 are arranged in parallel and connected to the heat exchanger 15 to form a heat exchange loop, and the motor 14 and the electronic valve group 13 are arranged in the heat exchange loop. The parallel arrangement is conducive to the alternating circulation of multiple solid-state refrigeration pipelines 120 for refrigeration, so that the refrigeration system 10 can continuously realize the refrigeration function.

[0070] When the refrigeration system 10 is running, the controller 11 selects some solid-state refrigeration pipelines 120 from the n solid-state refrigeration pipelines 120 to be powered on based on the target control strategy, controls the electronic valve group 13 to open the flow channel 1211 of the solid-state refrigeration pipeline 120 used for refrigeration, and closes the flow channel 1211 of the solid-state refrigeration pipeline 120 not used for refrigeration, and controls the motor 14 to operate to drive the heat exchange medium in the heat exchange circuit to circulate in the heat exchanger 15 and the flow channel 1211 of the solid-state refrigeration pipeline 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 a plurality of solid-state refrigeration modules 121, the plurality of 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 pipeline / 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 power of the refrigeration system 10 by increasing the number of solid-state refrigeration pipelines 120 arranged 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 arranged in the flow channel 1211, which absorbs heat when powered on, or releases heat when powered on and absorbs heat after power failure. In this embodiment, the controller 11 can select the solid-state refrigeration module 121 in the solid-state refrigeration pipeline 120 that needs to work / power on. After the solid-state refrigeration module 121 is connected to the power supply, the solid-state refrigeration module 121 has a polarization phenomenon due to the characteristics of the polar material. The polar material may include a positive polarity material and a reverse polarity material. The positive polarity material can absorb ambient heat after powering on, so that cooling can be performed during powering on. For example, the positive polarity material is a positive ferroelectric material, such as, but not limited to, a BaTiO3 system material, a (K0.5Na0.5)NbO3 system material. The reverse polarity material can release heat to the environment after powering on, and gradually recover to the ambient temperature, and power off after the ambient temperature is restored. During the power-off period, it will absorb ambient heat, so that cooling can be performed during the power-off period. For example, the anti-polarity material may be an anti-ferroelectric material, such as, but not limited to, PbZrO3 series materials, (Pb, La)(Zr, Sn, Ti)O3 (PLZST) materials.

[0075] In this embodiment, the solid-state refrigeration module 121 has a flow channel 1211 that bends back and forth. The inner wall of the flow channel 1211 is provided with a positive polarity material for absorbing heat when powered on, or a reverse polarity material that releases heat when powered on and absorbs heat after power is off. The back-and-forth bending design can increase the length of the flow channel 1211 within a limited space, increase the contact area between the heat exchange medium and the solid-state refrigeration module 121, and thus improve the heat exchange efficiency.

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

[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-on 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 reverse polarity material, the solid-state refrigeration module 121 used for refrigeration is the solid-state refrigeration module 121 that is powered on and then off and is in the power-off period; the solid-state refrigeration module 121 that is not used for refrigeration 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. In the solid-state refrigeration pipeline 120 not used for refrigeration, there may not be any solid-state refrigeration module 121 used for refrigeration, so that the waste of electric energy caused by the solid-state refrigeration module 121 in the refrigeration working state in the solid-state refrigeration pipeline 120 not used for refrigeration can be avoided.

[0080] In this embodiment, 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 to illustrate the refrigeration process of the refrigeration system 10. For example, after the polar material is powered on, the electric dipoles therein will change from a disordered state to an ordered state, and the polar material will absorb ambient heat; when the solid-state refrigeration module 121 is powered off, the electric dipoles therein will change from an ordered state to a disordered state, and the polar material will release heat to the surrounding ring. When the solid-state refrigeration module 121 is periodically powered on and off, the electric dipoles will undergo a periodic change of disorder-order-disorder-order, and the solid-state refrigeration module 121 will also undergo periodic heat absorption and heat release. 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, and 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 liner of the refrigeration system 10 and can be used to store refrigerated objects (such as beverages and food). The first pipe of the heat exchanger 15 can be spirally wrapped around the outer wall of the first container 161, which is conducive to increasing 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 the solid-state refrigeration module 121 is equivalent to a solid-state refrigeration pipeline 120. The electronic valve group 13 includes n groups of electronic valves, and each group of electronic valves in 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 120. The n groups of electronic valves are conducive to realizing the independent opening and closing of each solid-state refrigeration pipeline 120, and are convenient for flexible adjustment of the refrigeration 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 3 , a solid-state refrigeration pipeline 120 includes only one solid-state refrigeration module 121. The first valve 1311 and the second valve 1321 are used as the first group of electronic valves and 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 are used as the second group of electronic valves and 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 are used as the third group of electronic valves and are arranged at both ends of the flow channel of the solid-state refrigeration module c; the first valve 1314 and the second valve 1324 are used as the fourth group of electronic valves and 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 open 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 close 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, see Figure 4 A 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, such as Figure 3 or Figure 4 It should be noted that the number can be flexibly set according to the actual situation and is not limited to Figure 3 , Figure 4 Number shown.

[0086] The flow channel 1211 of the solid-state refrigeration module 121 may be, but is not limited to, a circular tube-type flow channel 1211 or a flat tube-type flow channel 1211. In other embodiments, the flow channel 1211 may be a circular tube-type flow channel 1211 and a flat tube-type flow channel 1211. As an example, the flow channel 1211 may be a flat tube-type flow channel 1211, so that the surface area for setting the polar material can be increased while reducing the number of times the pipeline bends back and forth.

[0087] In this embodiment, the inner wall of the flow channel of the solid-state refrigeration pipeline 120 / solid-state refrigeration module 121 is provided with a film formed of polar material, such as a ferroelectric film. By applying a DC voltage U 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 polar thin film materials can be micron-level. According to the theoretical basis for calculating the electrocaloric effect based on Maxwell's relationship, the electrothermal temperature change △T of polar materials can be expressed as:

[0089]

[0090] Where, ρ is the material density; D is the specific heat capacity of the polar material, P refers to the polarization strength 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 a typical ferroelectric material P (VDF-Tr FE-CFE) / BST is used at 20°C and an electric field of 1000KV / cm is applied, the test results show that the electrothermal temperature change △T = 20°C. Based on this, as long as the applied electric field strength is large enough and a polar material with a large pyroelectric coefficient is selected, an ideal electrothermal temperature change can be obtained to achieve the refrigeration function of the refrigeration system 10.

[0092] Assume that the mass of polar material is m 0 , specific heat capacity C 0 , then the absorbed heat is Cm△T, that is, the polar material can absorb energy ξCm△T from the heat transfer medium, ξ is the thermal conductivity, and the n modules absorb energy Q 0 =ξnCm△T. Then the total cooling capacity of the solid-state refrigeration pipeline 120 is P 0 =ξnCmΔT / Δt. For a specific polar material and solid state refrigeration module 121, the electric field and polarity are known parameters.

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

[0094] P 0 ≥P 1

[0095] Where P 0 refers to the total cooling capacity of n solid-state cooling pipelines 120, P 0 =ξγnm△T / (ρ△t)=ξγnV 0 △T / △t;

[0096] P 1 Refers to the required cooling capacity, P 1 =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] V 0 =Sd, S = LC, V 0 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 in which the polar material is provided 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] △T refers to the storage object of the refrigeration system 10 at an ambient temperature of T 0 , the temperature decreases within a time period of △t;

[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 transmitted from the environment to the refrigerated space;

[0104] The above condition P 0 ≥P 1 It 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 is C=2πr, where r is the radius of the cross section of the flow channel. Therefore, the above condition P 0 ≥P 1 It 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 according to the parameters n, L, and r to meet the total required heat load of the refrigeration system 10. In this way, it is helpful to accurately calculate the refrigeration power of the refrigeration system 10 before manufacturing the refrigeration system 10, so as to avoid waste caused by the actual refrigeration power of the designed refrigeration system 10 being too high, or failing to meet user needs due to the actual refrigeration power being too low.

[0105] Assume that the refrigeration system 10 is a refrigerator, and the refrigerator performance requirement is at an ambient temperature T 0 ℃, at time △t, the water temperature drops △T 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 P can be obtained 1 =Q 总 / △t.

[0106] If a solid-state refrigeration pipeline 120 includes only one solid-state refrigeration module 121, to achieve system refrigeration, then P 0 ≥P 1 , that is, ξγnV 0 T ≥ Q 总 The number n of solid-state refrigeration pipelines 120 / solid-state refrigeration modules 121 can be selected. 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 V 0 =Sd, 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 radius of the cross section 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 = Q 0 / W, P is the polarization strength of the material. For example, a polar material has a Ba doping ratio of 0.02 and a COP>1.7 at room temperature. It can be seen that the refrigeration efficiency of the refrigeration system 10 can achieve COP>1. Compared with the energy efficiency ratio of the traditional vehicle compressor refrigerator COP>1.1, the refrigeration system 10 provided by the present application is higher in energy efficiency ratio than the traditional compressor refrigerator.

[0108] In this embodiment, engineers have established a correspondence between different temperature differences and control strategies through experiments, which is conducive to dynamically adjusting the 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, and the control parameters include at least one of the working quantity of the solid-state refrigeration pipeline, the speed of the motor, and the valve opening in the electronic valve group. In the corresponding relationship, the temperature difference is positively correlated with the working quantity, or the speed, or the valve opening.

[0109] The corresponding relationship can be a relationship table or relationship curve between 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 pipeline works, or the greater the speed of the motor, or the greater the valve opening in the electronic valve group. In this way, it is beneficial to quickly increase the refrigeration power when the temperature difference is large, so as to shorten the time for the first temperature in the first container to drop to the second temperature set by the user.

[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 in the refrigeration system and the desired second temperature.

[0111] Understandably, the refrigeration system 10 can dynamically adjust the working quantity of the solid-state refrigeration pipeline, the speed of the motor, and the valve opening in the electronic valve group according to the temperature difference, so that the first temperature of the first container is equal to the second temperature or the difference is within a specified range, so as to realize dynamic temperature control. The valve opening can be used to adjust the flow rate of the heat exchange medium. In this way, it is conducive to improving the flexibility and adaptability of temperature regulation. Among them, the specified range can be a smaller temperature difference range, which can be 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-mentioned corresponding relationship, the motor speed S1, the number of solid-state refrigeration modules X1, and the number of solid-state refrigeration pipelines opened by the electronic valve group Y1 are found / calculated when the refrigeration system 10 starts to run, 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 runs for a period of time (the 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 some suitable solid-state refrigeration pipelines from the n solid-state refrigeration pipelines 120 to be powered on, and then power off after a period of power on, and repeatedly select some suitable solid-state refrigeration pipelines to be powered on to achieve a refrigeration cycle. Among them, for the solid-state refrigeration pipeline of positive polarity material, the suitable solid-state refrigeration pipeline may be a solid-state refrigeration pipeline that releases heat during power off and is close to the ambient temperature. For the solid-state refrigeration pipeline of reverse polarity material, the suitable solid-state refrigeration pipeline may be a solid-state refrigeration pipeline that absorbs external heat during power off and is close to the ambient temperature.

[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, wherein 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, and 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 understandable that the controller 11 can realize the control of each device 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, the motor speed, the number of open solid-state refrigeration pipelines, the number of working solid-state refrigeration modules, the opening of the valve in the corresponding electronic valve group, etc.

[0118] In this embodiment, in the p groups of solid-state refrigeration pipelines, the number of solid-state refrigeration pipelines in each group may be the same or different, and is not specifically limited here. In addition, alternating power-on in a set order may be alternating power-on according to the sequence number of the group, and cyclic operation, which is conducive to the accumulative running time of each solid-state refrigeration pipeline being similar, and avoiding the accumulative running time of some solid-state refrigeration pipelines being too long and prone to abnormality.

[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 pipeline uses positive polarity materials for refrigeration, the power-on sequence can be alternating according to the set order, and the cyclic operation can be:

[0120] 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 being powered on for a specified time. In addition, the controller also controls the electronic valve group to open the flow channel of the first group of solid-state refrigeration pipelines, and to close the flow channel of the second group of solid-state refrigeration pipelines, and controls the operation of the motor, wherein the specified time 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 lose power, only the second group of solid-state refrigeration pipelines are controlled to be powered on, and the power is turned off after being powered on for a specified period of time. In addition, the controller also controls the electronic valve group to open the flow channel of the second group of solid-state refrigeration pipelines, and close the flow channel of the first group of solid-state refrigeration pipelines, and controls the operation of the motor;

[0122] Step A3, repeating steps A1 and A2, thereby performing a refrigeration cycle.

[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. In the control process from step A1 to step A3, in each step, the controller also controls the electronic valve group to open the flow channel of the solid-state refrigeration pipeline that has been powered on in the step, and closes the flow channel of the solid-state refrigeration pipeline that is not used for refrigeration, and continuously controls the operation of the motor, and the motor provides power for the circulation of the heat exchange medium. In this way, the heat exchange medium can circulate in the flow channel of the solid-state refrigeration pipeline in the heat exchanger and the power-on. When the heat exchange medium flows through the powered solid-state refrigeration pipeline, the temperature will be reduced due to the heat absorption of the solid-state refrigeration pipeline. As the heat exchange medium circulates, when the heat exchange medium flows through the heat exchanger, the low-temperature heat exchange medium will reduce the temperature of the heat exchanger, and the heat exchanger can achieve refrigeration of the stored objects by heat exchange with the objects in the refrigeration space of the refrigeration system 10. In addition, the heat exchange medium flowing out of the heat exchanger can enter the powered solid-state refrigeration pipeline again, so that cyclic refrigeration can be performed.

[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 pipeline uses positive polarity materials for refrigeration, the power-on is alternately turned on in a set order, and the cyclic operation mode can be:

[0125] Step B1, the controller controls only the first group of solid-state refrigeration pipelines to be powered on, and the power is turned off after being powered on for a specified period of time. In addition, the controller also controls the electronic valve group to open the flow channel of the first group of solid-state refrigeration pipelines, and close the flow channels 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 lose power, only the second group of solid-state refrigeration pipelines are controlled to be powered on, and the power is turned off after being powered on for a specified period of time. In addition, the controller also controls the electronic valve group to open the flow channel of the second group of solid-state refrigeration pipelines, and close the flow channels 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 lose power, only the third group of solid-state refrigeration pipelines are controlled to be powered on, and the power is turned off after being powered on for a specified period of time. In addition, the controller also controls the electronic valve group to open the flow channel of the third group of solid-state refrigeration pipelines, and close the flow channels 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 refrigeration cycle.

[0129] When the number of solid-state refrigeration pipelines is large, if the refrigeration power of each solid-state refrigeration pipeline is the same, the refrigeration power of the refrigeration system 10 can be adjusted by adjusting the number of solid-state refrigeration pipelines in a single group. That is, the controller can determine the number of solid-state refrigeration pipelines in each group and the value of the number of groups p based on the currently required refrigeration power. The more solid-state refrigeration pipelines there are in a single group, the greater the refrigeration power. In order to reduce the impact of heat dissipation of the solid-state refrigeration pipeline on the refrigeration of the powered-on solid-state refrigeration pipeline after power failure, the positions of each group of powered-on solid-state refrigeration pipelines are adjacent.

[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 solid-state refrigeration pipelines other than the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0132] Control 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, select 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 update the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and control 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 control the operation of the motor, wherein i is cyclically taken from 0 to I 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, i takes values ​​from 0 to 1 in a cyclic manner, which can be understood as: i takes values ​​of 0, 1, ..., 1 in sequence, and then takes values ​​of 0, 1, ..., 1 again in sequence, and repeats this cycle. The intermediate variable i will not increase infinitely, but will be limited by the preset integer I. In this way, it can be avoided that the management and control of the solid-state refrigeration pipeline is not conducive to the excessive value of the intermediate variable i, wherein I can be flexibly set according to the actual situation.

[0134] As an example, I takes a value of 2, and i takes a value from 0 to 2 in a cyclic manner. The corresponding step of "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" can 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, and after the first 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 second group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to 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, and after the second 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 third group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to 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, and after the third 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 fourth group of solid-state refrigeration pipelines, and updating the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the fourth group of solid-state refrigeration pipelines;

[0138] 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 refrigeration, 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 after power failure will first rise and be higher than the ambient temperature, and then cool down and 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 refrigeration.

[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 refrigeration.

[0142] Please refer to Figure 5 There is a flow channel for the heat exchange medium to flow inside the solid-state refrigeration module, and the flow channel can be set to bend back and forth. In addition, the number of flow channels can be one or more, and the multiple flow channels can be set in parallel / stacked, in order to increase the contact area between the heat exchange medium and the core of the solid-state refrigeration module. The specific design and selection of the number of solid-state refrigeration pipelines / solid-state refrigeration modules, the flow channel area, the flow channel length, and the flow channel cross-sectional radius can be based on the above-mentioned 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 power-off process. 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 T 0 , the heat is Q 0 ; 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 T 0 +ΔT; further, keep the high voltage on, maintain the electric field, and the solid-state cooling 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 a power-off state, the electric dipoles in the core polar material return from an ordered state to a 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, and the temperature rises by ΔT and returns to the temperature T 0 ; This reciprocating cycle is used to refrigerate 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, and selects the solid-state refrigeration pipeline participating in refrigeration to perform 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 be Figure 6 The working process of A→B→C→D→A shown in the figure can achieve the purpose of absorbing the heat in the heat exchange medium for refrigeration; further, under the action of the motor (liquid pump), the heat exchange medium cooled by the solid refrigeration pipeline flows out of the solid refrigeration pipeline, flows through the motor, and flows into the heat exchanger; further, the heat exchange medium exchanges heat with the first container in the heat exchanger, flows out of the heat exchanger, and the heat exchange medium flow channel is spirally arranged on the outer wall of the container, which can increase the heat exchange area and improve the heat exchange performance. In this heat exchange process, the heat exchanger absorbs the heat of the first container and completes a cycle of refrigeration. Further, the heat exchange medium after heat exchange flows out of the heat exchanger and then flows into the corresponding solid refrigeration pipeline. Under the action of the controller, the corresponding first valve and the second valve are controlled to open, and the appropriate solid refrigeration pipeline is selected for refrigeration, and the solid refrigeration pipeline that participated in the refrigeration last time enters the heat dissipation process. Such reciprocating work can continuously take away the heat load of the first container, thereby completing the refrigeration.

[0145] In this embodiment, the electronic valve group is used to regulate the flow channel and flow rate of the integrated solid-state refrigeration module, so that the refrigeration system has the functions of multi-channel parallel refrigeration, free selection and switching of multiple channels. When the system is working, the first valve group of the electronic valve group selects the liquid heat exchange medium to enter the flow channel of a certain number of solid-state refrigeration modules, such as solid-state refrigeration modules 1, 2, 3...; then the second valve group opens the corresponding flow channel, and the liquid medium flows out of the solid-state refrigeration module, thereby realizing multi-channel parallel refrigeration. The cooling capacity of each independent solid-state refrigeration module is Q1=cm1△t, then the cooling capacity of i parallel refrigeration modules is Q'=icm1△t. The flow channel of each solid-state refrigeration module turns back and forth in the solid-state refrigeration pipeline to increase the heat exchange area of ​​the flow channel. The shape of the flow channel can be, but is not limited to, multiple S-shaped flow channels, Hui-shaped flow channels, and spiral annular 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 refrigeration mode, and the number of refrigeration levels can be the number of solid-state refrigeration modules connected in series on a single solid-state refrigeration pipeline. The number of refrigeration levels is ≥ 2, which is conducive to enhancing the refrigeration capacity of the solid-state refrigeration modal assembly and to realizing different levels of refrigeration in a refined manner. Among them, the maximum refrigeration power of the refrigeration system is the refrigeration power when all solid-state refrigeration modules are powered on. It should be noted that when all solid-state refrigeration modules are powered on, continuous refrigeration is not possible.

[0147] Please refer to Figure 8 , Fig. 9 and Fig.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 structure of the sealing plug 163. As an optional embodiment, the first container 161 is provided with an expansion interface 1611. The refrigeration system 10 may also include a second container 162, and the second container 162 is connected to the first container 161 through the expansion interface 1611. In this way, by using the expansion interface 1611 in conjunction with the second container 162, the refrigeration space of the refrigeration system 10 can be expanded to meet the user's demand for large volume.

[0148] Please refer again Figure 8 As an optional embodiment, the refrigeration system 10 may further include a sealing plug 163. When the extension interface 1611 is not connected to the second container 162, the sealing plug 163 is used to seal the extension interface 1611. The sealing plug 163 may include a sealing foam layer 1631, a plug shell 1632, a plug knob 1633, and a sealing clamping structure 1634. The sealing clamping structure 1634 may serve as a locking tongue, and the other end of the locking tongue may be engaged with the plug knob 1633 via a gear. The plug shell 1632 may fix and restrict the sealing foam layer 1631, the plug knob 1633, and the sealing clamping 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 lock hole for the sealing clamping structure 1634. By using the extension and contraction of the lock tongue and the lock hole, the sealing plug 163 and the expansion interface 1611 can be sealed and disassembled. The sealing foam layer 1631 can improve the airtightness of the sealing expansion interface 1611 and can play a role of heat preservation and sealing.

[0149] Understandably, when the user does not need to extend the connection of the second container 162 on the first container 161, the sealing plug 163 will block the expansion interface 1611 on the first container 161, and play a role in heat preservation and sealing for the first container 161. When it is necessary to extend the connection of the second container 162 on the first container 161, the sealing plug 163 can be removed and then connected to the first container 161. The way in which the sealing plug 163 blocks the expansion interface 1611 may include, but is not limited to, a knob, a press-fit connection, a button, a spring buckle, etc. The way of removing the sealing plug 163 is opposite to the way of blocking, and will not be repeated here.

[0150] Please refer to Fig.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, and the expansion interface 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, the third pipe 173 is provided with the fan 181, and the second pipe 172 does not need to be provided with the fan 181, so as to reduce the number of fans 181 and reduce costs.

[0151] The second pipe 172 and the third pipe 173 can serve as channels for the internal circulation of air in the first container 161 and the second container 162. When the fan 181 is in operation, it can provide power for the internal circulation of air, 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 achieve the refrigeration function without setting up a solid-state refrigeration pipeline, which is conducive to saving system hardware costs.

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

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

[0154] In this embodiment, a single solid-state refrigeration pipeline 120 may be a sheet-like structure or a plate-like structure. The solid-state refrigeration pipeline 120 has a flow channel that bends back and forth. The flow channel of the solid-state refrigeration pipeline 120 may be understood to be composed of a flow channel 1211 of a solid-state refrigeration module 121. The structure of a single solid-state refrigeration module 121 is similar to that of the solid-state refrigeration pipeline 120, and may also be a sheet-like structure or a plate-like structure 1. n solid-state refrigeration pipelines 120 are stacked to form a refrigeration assembly 12. In this way, through an integrated design, it is helpful to reduce the envelope area of ​​the space occupied by the refrigeration assembly 12, and it is helpful to reduce the space occupied by the refrigeration system 10.

[0155] In this embodiment, the motor is a device for providing flow power to the heat exchange medium, and may 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 by the present application has a great advantage in size when used as a vehicle refrigerator compared to a traditional compressor vehicle refrigerator. The refrigeration system 10 eliminates the compressor, condenser, and fan. Due to the difference in the scheme, the refrigeration system 10 uses an integrated solid-state refrigeration module instead of the "compressor, condenser, and fan", so that the refrigeration system 10 occupies a small volume. Under the same volume, compared with a traditional refrigerator, the refrigeration system 10 is conducive to designing a larger storage space and can better meet the vehicle needs. 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 demand power, the weight of the refrigeration assembly of the refrigeration system 10 is much less than 5kg. Therefore, the total weight of the system can be reduced, and the load of the whole vehicle can be reduced, thereby reducing the energy consumption of the whole 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 the distance from the compressor is 1m, while the present application only refers to the noise generated when the motor is running, and its noise is much smaller than the noise of the compressor at the same distance, thereby further improving the driving comfort.

[0157] Second embodiment

[0158] The embodiment of the present application also provides a vehicle, which may include a vehicle body and the aforementioned refrigeration system 10. The refrigeration system 10 may be used as a vehicle refrigerator, and may be arranged in a vehicle cabin, trunk, etc. The vehicle has the functions of the aforementioned refrigeration system 10, which is conducive to reducing the noise of the vehicle refrigerator during operation, and is conducive to the lightweight design of the vehicle refrigerator, thereby improving the user experience.

[0159] Third embodiment

[0160] Please refer to Fig.11The 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 to be powered on based on the target control strategy, where n is an integer greater than or equal to 2;

[0163] Step 220, controlling the electronic valve group to open the flow channel of the solid-state refrigeration pipeline used for refrigeration, and closing the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and controlling 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.

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

[0165] Based on the pre-established correspondence between the temperature difference and the control strategy, 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 in the first container in the refrigeration system and the expected second temperature, and the control parameters in the control strategy include at least one of the working number of the solid-state refrigeration pipeline, the rotation 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 powered on alternately in a set order and to run cyclically, 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 to 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 taking the solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines;

[0172] Control 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, select 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 update the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and control 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 control the operation of the motor, wherein i is cyclically taken from 0 to I 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 technicians in the relevant field can clearly understand that for the convenience and simplicity 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 may be an integrated circuit chip having signal processing capabilities. For example, the controller may be a body controller, a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and may implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

[0175] Fourth embodiment

[0176] The embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer executes the control method described in the above embodiment.

[0177] Through the description of the above implementation methods, technical personnel in this field can clearly understand that the present application can be implemented by hardware, and can also be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each implementation scenario of the present application.

[0178] In the embodiments provided in the present application, 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 merely schematic, for example, the flow charts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the systems, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a part of a module, a program segment or a code, and a part of the module, program segment or code includes one or more executable instructions for implementing the specified logical function. It should also be noted that each box in the block diagram and / or the flow chart, and the combination of the boxes in the block diagram and / or the flow chart can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0179] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. 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 system comprises: 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 loop, and the motor and the electronic valve group are arranged in the heat exchange loop; 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 motor to operate 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.

2. The system according to claim 1, characterized in that The target control strategy is: the controller selects a control strategy corresponding to the current temperature difference based on the pre-established correspondence between the temperature difference and the control strategy; 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; 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.

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

4. The system according to claim 1, characterized in that 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 powered on alternately in a set order and to run cyclically, 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 to close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

5. The 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 taking the solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines; Control 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, select 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 update the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and control 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 control the operation of the motor, wherein i is cyclically taken from 0 to I 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.

6. The system according to claim 1, characterized in that 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.

7. The system according to claim 6, characterized in that The total refrigeration capacity of the n solid-state refrigeration pipelines meets the following conditions: P0≥P1 In the formula, P0 refers to the total cooling capacity of the n solid-state refrigeration pipelines, P0=ξγnV0△T / △t, 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 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 the solid-state refrigeration pipelines; V0=Sd, S=LC, V0 refers to the volume of the polar material in the solid refrigeration pipeline; S refers to the coverage area of ​​the polar material in the flow channel of the solid refrigeration pipeline; d refers to the thickness of the polar material; L refers to the flow channel length of the solid refrigeration pipeline; C refers to the circumference of the cross section of the polar material in the tube body; △T refers to the drop in temperature of the stored object in the refrigeration system within a time period of △t 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 .

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

9. The system according to claim 8, characterized in that The first container is provided with an expansion interface, and the system further comprises a second container connected with the first container via the expansion interface.

10. The system according to claim 9, characterized in that The system further comprises a second pipeline and a third pipeline connecting the first container and the second container, and a fan is arranged in the second pipeline and / or the third pipeline.

11. The system according to claim 9, characterized in that The system further comprises a sealing plug, which is used to seal the expansion interface when the expansion interface is not connected to the second container.

12. The system according to any one of claims 1 to 11, 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.

13. The system according to any one of claims 1 to 11, 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.

14. A vehicle, characterized in that: The vehicle comprises a vehicle body and a refrigeration system as described in any one of claims 1-13.

15. A control method, characterized in that: Applied to a refrigeration system according to any one of claims 1 to 13, the method comprising: 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; 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.

16. The method according to claim 15, characterized in that Before selecting some solid-state refrigeration pipelines from the n solid-state refrigeration pipelines to be powered on based on the target control strategy, the method further includes: Based on the pre-established correspondence between the temperature difference and the control strategy, 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 in the first container in the refrigeration system and the expected second temperature, and the control parameters in the control strategy include at least one of the working number of the solid-state refrigeration pipeline, the rotation speed of the motor, and the valve opening in the electronic valve group.

17. The method according to claim 16, characterized in that The temperature difference is positively correlated with the work quantity, the rotation speed, or the valve opening.

18. The method according to claim 15, 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: 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 powered on alternately in a set order and to run cyclically, 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 to close the flow channel of the solid-state refrigeration pipeline not used for refrigeration, and the operation of the motor is controlled.

19. The method according to claim 15, 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 taking the solid-state refrigeration pipelines excluding the first group of solid-state refrigeration pipelines as candidate solid-state refrigeration pipelines; Control 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, select 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 update the candidate solid-state refrigeration pipelines to solid-state refrigeration pipelines excluding the 2+i group of solid-state refrigeration pipelines, and control 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 control the operation of the motor, wherein i is cyclically taken from 0 to I 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.

20. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 15 to 19.

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