Multi-mode electrocaloric refrigeration system
By introducing flow path switching components into the electric card refrigeration system, the system switch between the single-stage mode and the recycle mode is realized, and the problem of single operation mode in the prior art is solved, and the application adaptability and refrigeration efficiency of the system are improved.
Patent Information
- Application Number
- CN202422048252.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The existing electric card refrigeration system has a relatively single operating mode and cannot adapt to different application scenarios at the same time.
A multi-mode electric card refrigeration system is designed to adjust the conduction state of the hot-end radiator and the cold-end radiator and the electric card module through the flow path switching components in the fluid pipeline, so that the system can switch between the single-stage mode and the heat recovery mode.
It improves the diversity of operating modes of the electric card refrigeration system, enables the system to adapt to different application scenarios such as large refrigeration power or large temperature difference, and enhances the refrigeration efficiency and flexibility.
Smart Images
Figure CN223020573U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of refrigeration technology, for example, to a multi-mode electrocaloric refrigeration system. Background Art
[0002] Compression refrigeration products need to use fluorine-containing refrigerants, such as refrigerators and air conditioners. During production and use, they will produce the greenhouse effect and have the risk of leakage and environmental pollution. Therefore, finding a new refrigeration technology to replace compression refrigeration technology has become the research focus.
[0003] The new solid-state refrigeration technology based on the electrocaloric effect is one of the most likely technologies to replace compression refrigeration. However, ferroelectric materials do not have the natural hot and cold separation characteristics of thermoelectric materials. Therefore, it is necessary to separate the heat and cold generated by electrocaloric materials, and then realize refrigeration applications.
[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related technologies:
[0005] The operation mode of the existing electrocaloric refrigeration system is relatively single.
[0006] It should be noted that the information disclosed in the above background art section is only used to strengthen the understanding of the background of this application. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model
[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments. Instead, it serves as a preface to the subsequent detailed description.
[0008] The embodiments of the present disclosure provide a multi-mode electrocaloric refrigeration system, including: an electrocaloric module that can alternately generate heat and cold; a hot-end radiator connected to the electrocaloric module; a cold-end radiator connected to the electrocaloric module; and a fluid pipeline connecting the electrocaloric module, the hot-end radiator, and the cold-end radiator. The fluid pipeline is provided with a flow path switching component, and the flow path switching component is used to adjust the conduction state between the hot-end radiator and the cold-end radiator and the electrocaloric module, so that the electrocaloric refrigeration system can switch between a single-stage mode and a regenerative mode. Among them, the single-stage mode includes alternately connecting and exchanging heat between the hot-end radiator and the cold-end radiator and the electrocaloric module; the regenerative mode includes connecting the electrocaloric module to both the hot-end radiator and the cold-end radiator.
[0009] In some alternative embodiments, the electric card module includes a first heat exchange fluid inlet / outlet and a second heat exchange fluid inlet / outlet, and the flow path switching component includes a first valve body component and a second valve body component. Among them, the fluid pipeline includes: a first common pipe section, one end of which is communicatively connected to the first heat exchange fluid inlet / outlet, and the other end is disposed on the first valve body component; and a second common pipe section, one end of which is communicatively connected to the second heat exchange fluid inlet / outlet, and the other end is disposed on the second valve body component.
[0010] In some alternative embodiments, the first valve body component includes a three-way valve; and / or, the second valve body component includes a three-way valve.
[0011] In some alternative embodiments, a fluid pump is provided on the first common pipe section.
[0012] In some alternative embodiments, the fluid pipeline further includes: a first heat transfer pipe section, both ends of which are respectively communicatively connected to the first valve body component and the second valve body component, and the hot end radiator is communicatively connected to the first heat transfer pipe section; and a second heat transfer pipe section, both ends of which are respectively communicatively connected to the first valve body component and the second valve body component, and the cold end radiator is communicatively connected to the second heat transfer pipe section.
[0013] In some alternative embodiments, the first heat transfer pipe section includes a first outflow pipe section communicatively connected between the hot end radiator and the first valve body component, and a first return pipe section communicatively connected between the hot end radiator and the second valve body component. The second heat transfer pipe section includes a second outflow pipe section communicatively connected between the cold end radiator and the first valve body component, and a second return pipe section communicatively connected between the cold end radiator and the second valve body component. Among them, the flow path switching component further includes a third valve body component and a fourth valve body component. The third valve body component is disposed on the first return pipe section, the fourth valve body component is disposed on the second outflow pipe section, and the fluid pipeline further includes a heat regeneration communication pipe section communicatively connected between the third valve body component and the fourth valve body component.
[0014] In some alternative embodiments, the third valve body component includes a three-way valve; and / or, the fourth valve body component includes a three-way valve.
[0015] In some alternative embodiments, the electric card module includes: a housing that encloses an electric card accommodation cavity, and the housing is provided with a first heat exchange fluid inlet / outlet and a second heat exchange fluid inlet / outlet that are communicatively connected to the electric card accommodation cavity; an electric card material disposed in the electric card accommodation cavity, and the heat exchange fluid can exchange heat with the electric card material in the electric card accommodation cavity and flow out from the first heat exchange fluid inlet / outlet or the second heat exchange fluid inlet / outlet.
[0016] In some alternative embodiments, the housing includes a first side plate and a second side plate which are oppositely arranged. The first heat exchange fluid inlet and outlet are arranged on the first side plate, and the second heat exchange fluid inlet and outlet are arranged on the second side plate. A first fluid flow direction is formed from the first heat exchange fluid inlet and outlet to the second heat exchange fluid inlet and outlet. Among them, the number of electrocaloric materials is multiple, and the multiple electrocaloric materials are arranged along the first fluid flow direction.
[0017] In some alternative embodiments, the electrocaloric module further includes: a fixture, arranged on the inner wall of the housing, for fixing the electrocaloric material.
[0018] The multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure can achieve the following technical effects:
[0019] The multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure includes an electrocaloric module, a hot-end radiator, a cold-end radiator and a fluid pipeline. The electrocaloric module can alternately generate heat and cold when an electric field is applied and removed; the hot-end radiator is connected to the electrocaloric module and can receive the heat generated by the electrocaloric module, and the cold-end radiator is connected to the electrocaloric module and can receive the cold generated by the electrocaloric module.
[0020] The fluid pipeline connects the electrocaloric module, the hot-end radiator and the cold-end radiator to form a closed loop. And, a flow path switching component is arranged on the fluid pipeline, which can adjust the conduction state between the hot-end radiator and the cold-end radiator and the electrocaloric module, so as to switch the electrocaloric refrigeration system between a single-stage mode and a regenerative mode.
[0021] It can be seen that in the multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure, the conduction state between different radiators and the electrocaloric module can be adjusted through the flow path switching component, so that the electrocaloric refrigeration system can selectively operate in the single-stage mode or the regenerative mode, improving the diversity of the operating modes of the electrocaloric refrigeration system.
[0022] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Devices with the same reference numerals in the drawings are shown as similar devices. The drawings do not constitute a proportional limitation, and among them:
[0024] Figure 1 is a schematic diagram of a multi-mode electrocaloric refrigeration system provided by an embodiment of the present disclosure;
[0025] Figure 2 is a schematic diagram of another multi-mode electrocaloric refrigeration system provided by an embodiment of the present disclosure;
[0026] Figure 3 It is a schematic diagram of another multi-mode electrocaloric refrigeration system provided by an embodiment of the present disclosure;
[0027] Figure 4 It is a schematic diagram of another multi-mode electrocaloric refrigeration system provided by an embodiment of the present disclosure;
[0028] Figure 5 It is a schematic diagram of another multi-mode electrocaloric refrigeration system provided by an embodiment of the present disclosure;
[0029] Figure 6 It is a schematic diagram of another multi-mode electrocaloric refrigeration system provided by an embodiment of the present disclosure;
[0030] Figure 7 It is a schematic diagram of an electrocaloric module provided by an embodiment of the present disclosure.
[0031] Reference numerals:
[0032] 1: electrocaloric module; 101: first side plate; 102: second side plate; 11: first heat exchange fluid inlet and outlet; 12: second heat exchange fluid inlet and outlet; 13: electrocaloric material; 14: fixture;
[0033] 21: hot end radiator; 22: cold end radiator;
[0034] 3: fluid pipeline; 31: first common pipe section; 32: second common pipe section; 33: first outflow pipe section; 34: first return pipe section; 35: second outflow pipe section; 36: second return pipe section; 37: regenerative communication pipe section;
[0035] 41: first valve body component; 42: second valve body component; 43: third valve body component; 44: fourth valve body component;
[0036] 5: fluid pump. Detailed implementation manners
[0037] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.
[0038] In the description, claims, and above-mentioned accompanying drawings of the embodiments of the present disclosure, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to describe the embodiments of the present disclosure here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.
[0039] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated devices, devices, or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0040] In addition, the terms "arrangement", "connection", and "fixation" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, devices, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0041] Unless otherwise specified, the term "plurality" means two or more.
[0042] The term "and / or" is a description of the association relationship of an object, indicating that there can be three relationships. For example, A and / or B means: A or B, or, the three relationships of A and B.
[0043] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.
[0044] The electrocaloric effect is a thermal effect of ferroelectric materials under an electric field, where heat is released when an electric field is applied and heat is absorbed when the electric field is removed. The ferroelectric thin film is excited by applying a high electric field through the electrodes on both sides to generate a periodic electrocaloric effect. The electrocaloric refrigeration element is a component based on the electrocaloric effect, which releases heat and generates heat when an electric field is applied, and absorbs heat and generates cold when the electric field is removed.
[0045] The refrigeration modes of current electrocaloric refrigeration systems include a single-stage mode and a regenerative mode.
[0046] In the single-stage mode, when the electrocaloric material releases heat under an electric field, the electrocaloric material is moved to the radiator to release heat; when the electric field is removed from the electrocaloric material and it absorbs heat, the electrocaloric material is moved to the heat source to absorb heat. A cold-heat separation system that does not move the electrocaloric material but transfers heat through fluid flow also belongs to the single-stage mode, that is, when the electrocaloric material releases heat under an electric field, the hot-end fluid circulation is turned on, and the fluid flow transfers the heat to the hot-end radiator; when the electric field is removed from the electrocaloric material and it absorbs heat, the cold-end fluid circulation is turned on, and the fluid flow transfers the heat to the cold-end radiator. The characteristic of this cold-heat separation mode is that the temperature of different parts of the electrocaloric material is consistent, the temperature difference between the hot and cold ends of the electrocaloric refrigeration system is small, and it cannot exceed the temperature change of the electrocaloric material itself, but the refrigeration power is large.
[0047] The regenerative mode can only use fluid heat exchange. The cold end, the electrocaloric refrigeration material, and the hot end are connected, and a heat exchange fluid is filled. When the electrocaloric material releases heat under an electric field, the fluid moves towards the hot end; when the electric field is removed from the electrocaloric material and it absorbs heat, the fluid moves towards the cold end, and this cycle repeats. The characteristic of this mode is that the temperature difference between the hot and cold ends of the electrocaloric refrigeration system is large, which can exceed several times the temperature change of the electrocaloric material itself. This multiple is called the refrigeration factor, but the refrigeration power is small.
[0048] The above two cold-heat separation modes each have their own advantages and disadvantages. However, the existing electrocaloric refrigeration systems have a single refrigeration mode and cannot adapt to different application scenarios simultaneously.
[0049] The embodiments of the present disclosure provide a multi-mode electrocaloric refrigeration system that can operate in multiple operating modes, improving the diversity of the operating modes of the electrocaloric refrigeration system, as Figures 1 to 7 shown.
[0050] Optionally, the multi-mode electrocaloric refrigeration system includes an electrocaloric module 1, a hot-end radiator 21, a cold-end radiator 22, and a fluid pipeline 3. The electrocaloric module 1 can alternately generate heat and cold. The hot-end radiator 21 is connected to the electrocaloric module 1, the cold-end radiator 22 is connected to the electrocaloric module 1, the fluid pipeline 3 connects the electrocaloric module 1, the hot-end radiator 21, and the cold-end radiator 22, and a flow path switching component is provided on the fluid pipeline 3. The flow path switching component is used to adjust the conduction state between the hot-end radiator 21 and the cold-end radiator 22 and the electrocaloric module 1, so that the electrocaloric refrigeration system can switch between the single-stage mode and the regenerative mode. Among them, the single-stage mode includes alternately connecting and exchanging heat between the hot-end radiator 21 and the cold-end radiator 22 and the electrocaloric module 1; the regenerative mode includes connecting the electrocaloric module 1 to both the hot-end radiator 21 and the cold-end radiator 22.
[0051] It can be understood that in the single-stage mode, the electrocaloric module 1 is connected to the hot-end radiator 21, or the electrocaloric module 1 is connected to the cold-end radiator 22, that is, the alternate connection is realized.
[0052] In the regenerative mode, the heat exchange fluid flowing out of the electrocaloric module 1 sequentially flows through the hot-end radiator 21 and the cold-end radiator 22; alternatively, the heat exchange fluid flowing out of the electrocaloric module 1 sequentially flows through the cold-end radiator 22 and the hot-end radiator 21, that is, the electrocaloric module 1 is connected to both the hot-end radiator 21 and the cold-end radiator 22.
[0053] It can be seen that in the multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure, the fluid pipeline 3 is provided with a flow path switching component. The flow path switching component can switch the conduction and closing between different pipe sections of the fluid pipeline 3, thereby adjusting the conduction state between the hot-end radiator 21 and the cold-end radiator 22 and the electrocaloric module 1, so that the electrocaloric refrigeration system can be switched between the single-stage mode and the regenerative mode.
[0054] The multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure has both a single-stage mode and a regenerative mode, which can enable the electrocaloric refrigeration system to adapt to different application scenarios such as large refrigeration power or large temperature difference, and improves the diversity of the operating modes of the electrocaloric refrigeration system.
[0055] Optionally, the hot-end radiator 21 includes a temperature-equalizing plate radiator, a micro-channel radiator, etc., and the cold-end radiator 22 includes a temperature-equalizing plate radiator, a micro-channel radiator, a liquid-cooled plate radiator, etc. Among them, the liquid-cooled plate can be directly in contact with a specified heat source such as a circuit board to dissipate heat from the heat source. The embodiments of the present disclosure do not overly limit the types of the hot-end radiator 21 or the cold-end radiator 22.
[0056] The fluid pipeline 3 forms a closed loop among the electrocaloric module 1, the hot-end radiator 21 and the cold-end radiator 22. The fluid pipeline 3 is filled with a heat exchange fluid for heat exchange. The heat exchange fluid includes an insulating heat-conducting liquid, such as a single-phase fluorinated liquid, a phase-change fluorinated coolant, or a transformer insulating heat-conducting oil, etc. For the convenience of experiments or industrialization, transformer insulating heat-conducting oil is preferably used.
[0057] Optionally, the electrocaloric module 1 includes a first heat exchange fluid inlet / outlet 11 and a second heat exchange fluid inlet / outlet 12, and the flow path switching component includes a first valve body component 41 and a second valve body component 42. Among them, the fluid pipeline 3 includes a first common pipe section 31 and a second common pipe section 32. One end of the first common pipe section 31 is connected and arranged at the first heat exchange fluid inlet / outlet 11, and the other end is arranged at the first valve body component 41; one end of the second common pipe section 32 is connected and arranged at the second heat exchange fluid inlet / outlet 12, and the other end is arranged at the second valve body component 42.
[0058] The fluid pipeline 3 includes a first common pipe section 31 and a second common pipe section 32 that are connected to the first heat exchange fluid inlet / outlet 11 and the second heat exchange fluid inlet / outlet 12 at both ends of the electric caloric module 1. The first common pipe section 31 and the second common pipe section 32 can be understood as the pipe sections that the heat exchange fluid will flow through when the electric caloric refrigeration system operates in multiple modes. That is, when the multi-mode electric caloric refrigeration system operates in the single-stage mode and the regenerative mode, the heat exchange fluid flows through the first common pipe section 31 and the second common pipe section 32.
[0059] Optionally, the first valve body component 41 includes a three-way valve. Similarly, the second valve body component 42 includes a three-way valve.
[0060] Optionally, a fluid pump 5 is provided on the first common pipe section 31.
[0061] The flow pump can increase the flow rate of the heat exchange fluid in the fluid pipeline 3 to improve the refrigeration efficiency of the multi-mode electric caloric refrigeration system. At the same time, the fluid pump 5 can also adjust the flow direction of the heat exchange fluid in the fluid pipeline 3 so that the flow direction of the heat exchange fluid conforms to the current operating mode. Optionally, the fluid pump 5 includes a peristaltic pump.
[0062] Optionally, the fluid pipeline 3 further includes a first heat transfer pipe section and a second heat transfer pipe section. The two ends of the first heat transfer pipe section are respectively connected to the first valve body component 41 and the second valve body component 42, and the hot end radiator 21 is connected to the first heat transfer pipe section; the two ends of the second heat transfer pipe section are respectively connected to the first valve body component 41 and the second valve body component 42, and the cold end radiator 22 is connected to the second heat transfer pipe section.
[0063] The first valve body component 41 includes a three-way valve, and its three communication ports are respectively connected to the first common pipe section 31, the first heat transfer pipe section, and the second heat transfer pipe section. By controlling the conduction state of the first valve body component 41, the first common pipe section 31 can be selectively connected to the first heat transfer pipe section, or the first common pipe section 31 can be connected to the second heat transfer pipe section.
[0064] The second valve body component 42 includes a three-way valve, and its three communication ports are respectively connected to the second common pipe section 32, the first heat transfer pipe section, and the second heat transfer pipe section. By controlling the conduction state of the second valve body component 42, the second common pipe section 32 can be selectively connected to the first heat transfer pipe section, or the second common pipe section 32 can be connected to the second heat transfer pipe section.
[0065] Optionally, the first heat transfer pipe section includes a first outflow pipe section 33 communicating between the hot-end radiator 21 and the first valve body component 41, and a first return pipe section 34 communicating between the hot-end radiator 21 and the second valve body component 42. The second heat transfer pipe section includes a second outflow pipe section 35 communicating between the cold-end radiator 22 and the first valve body component 41, and a second return pipe section 36 communicating between the cold-end radiator 22 and the second valve body component 42. Wherein, the flow path switching component further includes a third valve body component 43 and a fourth valve body component 44. The third valve body component 43 is disposed on the first return pipe section 34, and the fourth valve body component 44 is disposed on the second outflow pipe section 35. Moreover, the fluid pipeline 3 further includes a heat regeneration communication pipe section 37 communicating between the third valve body component 43 and the fourth valve body component 44. Optionally, the third valve body component 43 includes a three-way valve; the fourth valve body component 44 includes a three-way valve.
[0066] The third valve body component 43 includes a three-way valve, which can selectively conduct the first return pipe section 34 or conduct the heat regeneration communication pipe section 37. Similarly, the fourth valve body component 44 includes a three-way valve, which can selectively conduct the second outflow pipe section 35 or conduct the heat regeneration communication pipe section 37. That is, the flow path switching component on the fluid pipeline 3 includes the first valve body component 41, the second valve body component 42, the third valve body component 43, and the fourth valve body component 44. Optionally, the first valve body component 41, the second valve body component 42, the third valve body component 43, and the fourth valve body component 44 can all be three-way valves.
[0067] The multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure can adjust the operating mode of the multi-mode electrocaloric refrigeration system by controlling the conduction states of the first valve body component 41, the second valve body component 42, the third valve body component 43, and the fourth valve body component 44.
[0068] Optionally, the multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure can operate in a single-stage mode heating cycle. Control the first valve body component 41 to conduct the first common pipe section 31 and the first outflow pipe section 33, and control the first valve body component 41 to close the first common pipe section 31 and the second outflow pipe section 35; control the second valve body component 42 to conduct the second common pipe section 32 and the first return pipe section 34, and control the second valve body component 42 to close the second common pipe section 32 and the second return pipe section 36; control the third valve body component 43 to conduct the first return pipe section 34; control the fourth valve body component 44 to be closed.
[0069] When the multi-mode electrocaloric refrigeration system operates in the single-stage mode heating cycle, the electrocaloric material 13 in the electrocaloric module 1 releases heat under the action of an applied electric field. The heat released by the electrocaloric material 13 exchanges heat with the heat exchange fluid to obtain a high-temperature heat exchange fluid. The high-temperature heat exchange fluid sequentially flows through the first common pipe section 31, the first outflow pipe section 33, the hot-end radiator 21, the first return pipe section 34, the second common pipe section 32, and flows back to the electrocaloric module 1 to complete a single-stage mode heating cycle. As Figure 3 shown.
[0070] Optionally, the multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure can also operate in a single-stage mode refrigeration cycle. Control the first valve body component 41 to conduct the first common pipe section 31 and the second outflow pipe section 35, and control the first valve body component 41 to close the first common pipe section 31 and the first outflow pipe section 33; control the second valve body component 42 to conduct the second common pipe section 32 and the second return pipe section 36, and control the second valve body component 42 to close the second common pipe section 32 and the first return pipe section 34; control the third valve body component 43 to close; control the fourth valve body component 44 to conduct the second outflow pipe section 35.
[0071] When the multi-mode electrocaloric refrigeration system operates in the single-stage mode refrigeration cycle, the electrocaloric material 13 in the electrocaloric module 1 absorbs heat under the action of the removed electric field. The cold released by the electrocaloric material 13 exchanges cold with the heat exchange fluid to obtain a low-temperature heat exchange fluid. The low-temperature heat exchange fluid sequentially flows through the first common pipe section 31, the second outflow pipe section 35, the cold-end radiator 22, the second return pipe section 36, the second common pipe section 32, and flows back to the electrocaloric module 1 to complete a single-stage mode refrigeration cycle. As Figure 4 shown.
[0072] It can be understood that the multi-mode electrocaloric refrigeration system can alternately operate in the single-stage mode heating cycle and the single-stage mode refrigeration cycle according to the applied electric field and the removed electric field of the electrocaloric module 1.
[0073] Optionally, the multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure can also operate in a regenerative mode heating cycle. Control the first valve body component 41 to conduct the first common pipe section 31 and the first outflow pipe section 33, and control the first valve body component 41 to close the first common pipe section 31 and the second outflow pipe section 35; control the second valve body component 42 to conduct the second common pipe section 32 and the second return pipe section 36, and control the second valve body component 42 to close the second common pipe section 32 and the first return pipe section 34; control the third valve body component 43 to conduct the first return pipe section 34 and the regenerative connection pipe section 37; control the fourth valve body component 44 to conduct the regenerative connection pipe section 37 and the second outflow pipe section 35.
[0074] When the multi-mode electrocaloric refrigeration system operates in the regenerative heating cycle, the electrocaloric material 13 in the electrocaloric module 1 releases heat under the action of an applied electric field. The heat released by the electrocaloric material 13 exchanges heat with the heat exchange fluid to obtain a high-temperature heat exchange fluid. The high-temperature heat exchange fluid sequentially flows through a first common pipe section 31, a first outflow pipe section 33, a hot-end radiator 21, a part of a first return pipe section 34, a regenerative connection pipe section 37, a part of a second outflow pipe section 35, a cold-end radiator 22, a second return pipe section 36, a second common pipe section 32, and flows back to the electrocaloric module 1 to complete one regenerative heating cycle. As Figure 5 shown.
[0075] Optionally, the multi-mode electrocaloric refrigeration system provided by the embodiments of the present disclosure can also operate in the regenerative cooling cycle. Control the first valve body component 41 to conduct the first common pipe section 31 and the first outflow pipe section 33, and control the first valve body component 41 to close the first common pipe section 31 and the second outflow pipe section 35; control the second valve body component 42 to conduct the second common pipe section 32 and the second return pipe section 36, and control the second valve body component 42 to close the second common pipe section 32 and the first return pipe section 34; control the third valve body component 43 to conduct the first return pipe section 34 and the regenerative connection pipe section 37; control the fourth valve body component 44 to conduct the regenerative connection pipe section 37 and the second outflow pipe section 35.
[0076] When the multi-mode electrocaloric refrigeration system operates in the regenerative cooling cycle, the electrocaloric material 13 in the electrocaloric module 1 absorbs heat under the action of the removed electric field. The cold released by the electrocaloric material 13 exchanges cold with the heat exchange fluid to obtain a low-temperature heat exchange fluid. The low-temperature heat exchange fluid sequentially flows through the second common pipe section 32, the second return pipe section 36, the cold-end radiator 22, a part of the second outflow pipe section 35, the regenerative connection pipe section 37, a part of the first return pipe section 34, the hot-end radiator 21, the first outflow pipe section 33, the first common pipe section 31, and flows back to the electrocaloric module 1 to complete one regenerative cooling cycle. As Figure 6 shown.
[0077] The embodiments of the present disclosure also provide a structure of the electrocaloric module 1, as Figure 7 shown.
[0078] Optionally, the electrocaloric module 1 includes a housing and an electrocaloric material 13 disposed in the housing. The housing encloses an electrocaloric accommodation cavity, and the housing is provided with a first heat exchange fluid inlet / outlet 11 and a second heat exchange fluid inlet / outlet 12 that communicate with the electrocaloric accommodation cavity. The electrocaloric material 13 is disposed in the electrocaloric accommodation cavity, and the heat exchange fluid can exchange heat with the electrocaloric material 13 in the electrocaloric accommodation cavity and flow out from the first heat exchange fluid inlet / outlet 11 or the second heat exchange fluid inlet / outlet 12.
[0079] The electrocaloric material 13 can release heat when an electric field is applied and absorb heat when the electric field is removed. The electrocaloric material 13 can be designed into structures such as sheet, block, film, etc., and is fixedly arranged in the electrocaloric accommodation cavity of the housing. Optionally, the electrocaloric material 13 includes Ba0.7Sr0.3Ti0.997Mn0.003O3, Ba(Zr0.05Ti0.95)O3, etc.
[0080] The heat exchange fluid flowing in from one of the first heat exchange fluid inlet / outlet 11 and the second heat exchange fluid inlet / outlet 12 exchanges heat or cold with the electrocaloric material 13, and the heat exchange fluid after completing the heat or cold exchange flows out from the other inlet / outlet.
[0081] Optionally, the housing includes a first side plate 101 and a second side plate 102 arranged opposite to each other. The first heat exchange fluid inlet / outlet 11 is arranged on the first side plate 101, and the second heat exchange fluid inlet / outlet 12 is arranged on the second side plate 102. A first fluid flow direction is formed from the first heat exchange fluid inlet / outlet 11 to the second heat exchange fluid inlet / outlet 12. Among them, the number of electrocaloric materials 13 is multiple, and the multiple electrocaloric materials 13 are arranged along the first fluid flow direction.
[0082] The housing includes a first side plate 101 and a second side plate 102 arranged opposite to each other. The first heat exchange fluid inlet / outlet 11 is arranged on the first side plate 101, and the second heat exchange fluid inlet / outlet 12 is arranged on the second side plate 102. Optionally, the first heat exchange fluid inlet / outlet 11 and the second heat exchange fluid inlet / outlet 12 are arranged at the same height. For example, the first heat exchange fluid inlet / outlet 11 is arranged in the middle of the first side plate 101, and the second heat exchange fluid inlet / outlet 12 is arranged in the middle of the second side plate 102, as Figure 7 shown. In this way, the smoothness of the heat exchange fluid flowing in the housing is improved.
[0083] Optionally, a first heat exchange fluid inlet / outlet 11 is respectively opened at the top and bottom of the first side plate 101, and a second heat exchange fluid inlet / outlet 12 is also respectively opened at the top and bottom of the second side plate 102. When the heat exchange fluid flows in from the first heat exchange fluid inlet / outlet 11 and flows out from the second heat exchange fluid inlet / outlet 12, control the first heat exchange fluid inlet / outlet 11 at the top of the first side plate 101 to be conducted with the first common pipe section 31, and control the second heat exchange fluid inlet / outlet 12 at the bottom of the second side plate 102 to be conducted with the second common pipe section 32. In this way, the heat exchange fluid can flow out after fully exchanging heat with the multiple electrocaloric materials 13, and the heat exchange effect between the heat exchange fluid and the electrocaloric materials 13 is improved.
[0084] Optionally, the first fluid flow direction is as Figure 7 shown by the arrow direction in. The arrangement direction of the multiple electrocaloric materials 13 is parallel to the first fluid flow direction. In this way, the heat exchange effect between the heat exchange fluid and the electrocaloric materials 13 is improved.
[0085] Optionally, the electric card module 1 further includes a fixture 14 disposed on the inner wall of the housing for fixing the electrocaloric material 13.
[0086] The electrocaloric material 13 is fixed to the inner wall of the housing by the fixture 14, that is, the electrocaloric material 13 is fixedly arranged in the electrocaloric accommodation cavity in the form of an inserted piece, which improves the fixing stability of the electrocaloric material 13.
[0087] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. Embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A multi-mode electric card refrigeration system, characterized in that: include: The electric card module can generate heat and cold alternately; The hot end radiator is connected to the electric card module; A cold end radiator, connected to the electric card module; and, The fluid pipeline is connected to the electric card module, the hot end radiator and the cold end radiator, and the fluid pipeline is provided with a flow path switching component, which is used to adjust the conduction state of the hot end radiator and the cold end radiator with the electric card module, so that the electric card refrigeration system can be switched between the single-stage mode and the heat recovery mode. Among them, the single-stage mode includes the hot-end radiator and the cold-end radiator being alternately connected to the electric card module for heat exchange; the heat recovery mode includes the electric card module being connected to the hot-end radiator and the cold-end radiator.
2. The multi-mode electric card refrigeration system according to claim 1, characterized in that: The electric card module includes a first heat exchange fluid inlet and outlet and a second heat exchange fluid inlet and outlet, and the flow path switching component includes a first valve body component and a second valve body component, wherein the fluid pipeline includes: A first common pipe section, one end of which is connected to the first heat exchange fluid inlet and outlet, and the other end of which is disposed at the first valve body component; and, The second common pipe section has one end connected to the second heat exchange fluid inlet and outlet, and the other end is arranged at the second valve body component.
3. The multi-mode electric card refrigeration system according to claim 2, characterized in that: The first valve body component comprises a three-way valve; and / or, The second valve body component includes a three-way valve.
4. The multi-mode electric card refrigeration system according to claim 2, characterized in that: The first common pipe section is provided with a fluid pump.
5. The multi-mode electric card refrigeration system according to claim 2, characterized in that: Fluid pipelines also include: The first heat transfer pipe section has two ends connected to the first valve body component and the second valve body component respectively, and the hot end radiator is connected to the first heat transfer pipe section; and, The second heat transfer pipe section has two ends respectively connected to the first valve body component and the second valve body component, and the cold end radiator is connected to the second heat transfer pipe section.
6. The multi-mode electric card refrigeration system according to claim 5, characterized in that: The first heat transfer pipe section includes a first outflow pipe section connected between the hot end radiator and the first valve body component, and a first return pipe section connected between the hot end radiator and the second valve body component. The second heat transfer pipe section includes a second outflow pipe section connected between the cold end radiator and the first valve body component, and a second return pipe section connected between the cold end radiator and the second valve body component. Among them, the flow path switching component also includes a third valve body component and a fourth valve body component, the third valve body component is arranged in the first reflux pipe section, the fourth valve body component is arranged in the second outflow pipe section, and the fluid pipeline also includes a heat recovery connecting pipe section connected to the third valve body component and the fourth valve body component.
7. The multi-mode electric card refrigeration system according to claim 6, characterized in that: The third valve body component comprises a three-way valve; and / or, The fourth valve body component includes a three-way valve.
8. The multi-mode electric card refrigeration system according to any one of claims 1 to 7, characterized in that: The electric card module includes: The shell encloses the electric card accommodating chamber, and the shell is provided with a first heat exchange fluid inlet and outlet and a second heat exchange fluid inlet and outlet communicated with the electric card accommodating chamber; The electric card material is arranged in the electric card accommodating chamber, and the heat exchange fluid can exchange heat with the electric card material in the electric card accommodating chamber and flow out from the first heat exchange fluid inlet and outlet or the second heat exchange fluid inlet and outlet.
9. The multi-mode electric card refrigeration system according to claim 8, characterized in that: The shell includes a first side plate and a second side plate arranged opposite to each other, a first heat exchange fluid inlet and outlet are arranged on the first side plate, and a second heat exchange fluid inlet and outlet are arranged on the second side plate, and a first fluid flow direction is formed from the first heat exchange fluid inlet and outlet to the second heat exchange fluid inlet and outlet, There are multiple electrocaloric materials, and the multiple electrocaloric materials are arranged along the flow direction of the first fluid.
10. The multi-mode electric card refrigeration system according to claim 9, characterized in that: The electric card module also includes: The clamp is arranged on the inner wall of the shell and is used to fix the electric card material.