Electrocaloric refrigeration system and household appliance

Abstract

The utility model relates to the technical field of electrocaloric refrigeration, and discloses an electrocaloric refrigeration system which comprises a positive electrocaloric refrigeration device, a negative electrocaloric refrigeration device, a first working medium circulation flow path, a second working medium circulation flow path, a first communicating pipeline and a second communicating pipeline. The two ends of the first working medium circulation flow path communicate with the positive electrocaloric refrigeration device correspondingly, and the first working medium circulation flow path is provided with a hot end radiator. The two ends of the second working medium circulation flow path communicate with the negative electric card refrigeration device correspondingly, and the second working medium circulation flow path is provided with a cold end radiator. The first communicating pipeline is communicated with the positive electrocaloric refrigeration device and is communicated with the cold end radiator; and the second communicating pipeline is communicated with the negative electric card refrigerating device and is communicated with the hot end radiator. According to the electrocaloric refrigeration system, refrigeration can be continuously carried out under the condition that the positive electrocaloric refrigeration device and the negative electrocaloric refrigeration device are subjected to electric field adding or electric field removing at the same time. The utility model further provides the household appliance.

Description

Technical Field

[0001] The present application relates to the technical field of electric card refrigeration, for example, to an electric card refrigeration system and household appliances. Background Art

[0002] Steam compressor refrigeration equipment uses fluorinated refrigerants and has been widely used in production and life such as industrial refrigeration, food preservation and air conditioning systems. However, steam compressors will produce a greenhouse effect during production and use, and there is a risk of leakage and environmental pollution. With the development of modern society, the huge demand for refrigeration equipment has exacerbated the global energy crisis, extreme high temperature weather and the frequent occurrence of natural disasters. Therefore, a new refrigeration technology is urgently needed to replace the existing refrigeration technology.

[0003] The new solid-state refrigeration technology based on the electrocaloric effect is one of the technologies most likely to replace compressor refrigeration. When the electric field is applied, the electrocaloric element releases heat and the temperature rises; when the electric field is removed, the electrocaloric element absorbs heat and the temperature drops. It has a very broad application prospect.

[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 art:

[0005] The electric card element generates heat and cold alternately and periodically, that is, the electric card element can only be in cooling mode half of the time, which greatly limits the cooling power of the electric card cooling device.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiment of the present disclosure provides an electric card refrigeration system, including: a positive electric card refrigeration device, which releases heat when an electric field is applied and absorbs heat when the electric field is removed; a negative electric card refrigeration device, which absorbs heat when an electric field is applied and releases heat when the electric field is removed; a first working fluid circulation flow path, whose two ends are respectively connected to a first positive electric card connection end and a second positive electric card connection end of the positive electric card refrigeration device, and the first working fluid circulation flow path is provided with a hot end radiator; a second working fluid circulation flow path, whose two ends are respectively connected to a first negative electric card connection end and a second negative electric card connection end of the negative electric card refrigeration device, and the second working fluid circulation flow path is provided with a cold end radiator; a first connecting pipe, whose two ends are respectively connected to a third positive electric card connection end and a fourth positive electric card connection end of the positive electric card refrigeration device, and the first connecting pipe is connected to the cold end radiator; and a second connecting pipe, whose two ends are respectively connected to a third negative electric card connection end and a fourth negative electric card connection end of the negative electric card refrigeration device, and the second connecting pipe is connected to the hot end radiator.

[0009] In some optional embodiments, the second working fluid circulation flow path includes a cold end inlet pipe section connected to the first negative electric card connection end and the inlet end of the cold end radiator, and a cold end exhaust pipe section connected to the second negative electric card connection end and the outlet end of the cold end radiator, wherein the first connecting pipeline includes a first cold end connecting section connected to the third positive electric card connection end and the cold end inlet pipe section, and a second cold end connecting section connected to the fourth positive electric card connection end and the cold end exhaust pipe section.

[0010] In some optional embodiments, the cold end inlet pipe section includes a first connecting point connected to the first cold end connecting section, wherein the first connecting point is provided with a first three-way valve; the cold end outlet pipe section includes a second connecting point connected to the second cold end connecting section, wherein the second connecting point is provided with a second three-way valve.

[0011] In some optional embodiments, a first pump body is arranged between the first three-way valve of the cold end entering the pipe section and the inlet end of the cold end radiator; or, a first check valve is arranged between the first three-way valve of the cold end entering the pipe section and the inlet end of the cold end radiator, and the conduction direction of the first check valve is from the first three-way valve to the inlet end of the cold end radiator.

[0012] In some optional embodiments, the first working fluid circulation flow path includes a hot end entry pipe section connected to the first positive electric card connection end and the inlet end of the hot end radiator, and a hot end exhaust pipe section connected to the second positive electric card connection end and the outlet end of the hot end radiator, wherein the second connecting pipeline includes a first hot end connecting section connected to the third negative electric card connection end and the hot end entry pipe section, and a second hot end connecting section connected to the fourth negative electric card connection end and the hot end exhaust pipe section.

[0013] In some optional embodiments, the hot end inlet pipe section includes a third connecting point connected to the first hot end connecting section, wherein the third connecting point is provided with a third three-way valve; the hot end outlet pipe section includes a fourth connecting point connected to the second hot end connecting section, wherein the fourth connecting point is provided with a fourth three-way valve.

[0014] In some optional embodiments, a second pump body is arranged between the third three-way valve of the hot end entering the pipe section and the inlet end of the hot end radiator; or, a second one-way valve is arranged between the third three-way valve of the hot end entering the pipe section and the inlet end of the hot end radiator, and the conduction direction of the second one-way valve is from the third three-way valve to the inlet end of the hot end radiator.

[0015] In some optional embodiments, the positive electric card refrigeration device includes: a first heat exchange shell, which encloses a first heat exchange chamber and is connected to a first working fluid circulation path and a first connecting pipe; and a positive electric card element, which is arranged in the first heat exchange chamber and exchanges heat with the working fluid in the first heat exchange chamber.

[0016] In some optional embodiments, the negative electric card refrigeration device includes: a second heat exchange shell, which encloses a second heat exchange chamber and is connected to the second working fluid circulation path and the second connecting pipe; and a negative electric card element, which is arranged in the second heat exchange chamber and exchanges heat with the working fluid in the second heat exchange chamber.

[0017] An embodiment of the present disclosure provides a household appliance, including the electric card refrigeration system as described above.

[0018] The electric card refrigeration system and household appliance provided by the embodiments of the present disclosure can achieve the following technical effects:

[0019] The electric card refrigeration system includes a positive electric card refrigeration device and a negative electric card refrigeration device. The positive electric card refrigeration device releases heat when the electric field is applied and absorbs heat when the electric field is removed. The negative electric card refrigeration device absorbs heat when the electric field is applied and releases heat when the electric field is removed. The positive electric card refrigeration device and the hot end radiator are connected in the first working medium circulation flow path, and the negative electric card refrigeration device and the cold end radiator are connected in the second working medium circulation flow path. At the same time, a first connecting pipeline is provided to connect the positive electric card refrigeration device to the cold end radiator, and a second connecting pipeline is provided to connect the negative electric card refrigeration device to the hot end radiator.

[0020] It can be seen that in the electric card refrigeration system provided by the embodiment of the present disclosure, the positive electric card refrigeration device and the negative electric card refrigeration device are respectively connected to the hot end radiator through the first working fluid circulation flow path and the second connecting pipe, and the positive electric card refrigeration device and the negative electric card refrigeration device are respectively connected to the cold end radiator through the second working fluid circulation flow path and the first connecting pipe. In this way, when the electric field is applied or removed to the positive electric card refrigeration device and the negative electric card refrigeration device at the same time, the cold end radiator can continuously receive cold, so that the electric card refrigeration system can continuously exert the refrigeration effect, thereby improving the refrigeration power of the electric card refrigeration system.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Devices with the same reference numerals in the drawings are shown as similar devices, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a schematic diagram of an electric card refrigeration system provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of another electric card refrigeration system provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of another electric card refrigeration system provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic diagram of another electric card refrigeration system provided by an embodiment of the present disclosure;

[0027] Figure 5 It is a schematic diagram of another electric card refrigeration system provided by an embodiment of the present disclosure.

[0028] Reference numerals:

[0029] 1: positive electric card cooling device; 11: first positive electric card connection end; 12: second positive electric card connection end; 13: third positive electric card connection end; 14: fourth positive electric card connection end;

[0030] 2: negative electric card refrigeration device; 21: first negative electric card connection end; 22: second negative electric card connection end; 23: third negative electric card connection end; 24: fourth negative electric card connection end;

[0031] 3: hot end radiator; 31: inlet end of the hot end radiator; 32: outlet end of the hot end radiator;

[0032] 4: cold end radiator; 41: inlet end of the cold end radiator; 42: outlet end of the cold end radiator;

[0033] 51: first working medium circulation flow path; 511: hot end inlet pipe section; 512: hot end outlet pipe section;

[0034] 52: second working medium circulation flow path; 521: cold end inlet pipe section; 522: cold end outlet pipe section;

[0035] 61: first connecting pipeline; 611: first cold end connecting section; 612: second cold end connecting section; 62: second connecting pipeline; 621: first hot end connecting section; 622: second hot end connecting section;

[0036] 71: first three-way valve; 72: second three-way valve; 73: fourth three-way valve; 74: third three-way valve;

[0037] 81: first one-way valve; 82: second one-way valve. DETAILED DESCRIPTION

[0038] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0039] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, components or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. 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.

[0041] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" 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 a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, 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 the specific circumstances.

[0042] Unless otherwise stated, the term "plurality" means two or more.

[0043] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0045] Positive electrocaloric element is a kind of component based on electrocaloric effect, which releases heat when electric field is applied and absorbs heat when electric field is removed to generate cold. Among them, positive electrocaloric materials include Ba 0.7 Sr 0.3 Ti 0.997 Mn 0.003 O3、Ba(Zr 0.05 Ti 0.95 )O3. In contrast to the positive electrocardioid element, the negative electrocardioid element can also be called the reverse electrocardioid element. It absorbs heat to generate cold when the electric field is applied, and releases heat to generate heat when the electric field is removed. Among them, the negative electrocardioid material includes Pb 0.97 La 0.02 (Zr 0.95 Ti 0.05 )O3、Pb 0.98 La 0.02 (Zr 0.95 Ti 0.05 )0.95 O3,

[0046] (Pb 0.97 La 0.02 )(Zr x Sn 0.94-x Ti 0.06 )O3、Pb 0.98 La 0.02 (Zr 0.95 Ti 0.05 ) 0.99 O3.

[0047] The present disclosure provides an electric card cooling system. Figures 1 to 5 shown.

[0048] The electric card refrigeration system provided by the embodiment of the present disclosure includes a positive electric card refrigeration device 1, a negative electric card refrigeration device 2, a first working fluid circulation flow path 51, a second working fluid circulation flow path 52, a first connecting pipe 61 and a second connecting pipe 62. The positive electric card refrigeration device 1 releases heat when an electric field is applied and absorbs heat when the electric field is removed, and the negative electric card refrigeration device 2 absorbs heat when an electric field is applied and releases heat when the electric field is removed. The two ends of the first working fluid circulation flow path 51 are respectively connected to the first positive electric card connection end 11 and the second positive electric card connection end 12 of the positive electric card refrigeration device 1, and the first working fluid circulation flow path 51 is provided with a hot end radiator 3. The two ends of the second working fluid circulation flow path 52 are respectively connected to the first negative electric card connection end 21 and the second negative electric card connection end 22 of the negative electric card refrigeration device 2, and the second working fluid circulation flow path 52 is provided with a cold end radiator 4.

[0049] The electric card refrigeration system provided in the embodiment of the present disclosure further includes a first connecting pipeline 61 and a second connecting pipeline 62 .

[0050] The two ends of the first connecting pipe 61 are respectively connected to the third positive electric card connection end 13 and the fourth positive electric card connection end 14 of the positive electric card refrigeration device 1, and the first connecting pipe 61 is connected to the cold end radiator 4. The two ends of the second connecting pipe 62 are respectively connected to the third negative electric card connection end 23 and the fourth negative electric card connection end 24 of the negative electric card refrigeration device 2, and the second connecting pipe 62 is connected to the hot end radiator 3.

[0051] The positive electric card cooling device 1 is provided with a positive electric card element, which releases heat when an electric field is applied, and the temperature rises, and absorbs heat when the electric field is removed, and the temperature drops. The negative electric card cooling device 2 is provided with a negative electric card element, which absorbs heat when an electric field is applied, and the temperature drops, and releases heat when the electric field is removed, and the temperature rises.

[0052] When an electric field is applied to the positive electric card refrigeration device 1 and the negative electric card refrigeration device 2 in the electric card refrigeration system at the same time, the negative electric card refrigeration device 2 is in a heat absorption state, and is connected to the cold end radiator 4 through the second working fluid circulation flow path 52, so that the cold generated by the negative electric card refrigeration device 2 can be transferred to the cold end radiator 4, thereby playing a refrigeration function; the positive electric card refrigeration device 1 is in a heat release state, and is connected to the hot end radiator 3 through the first working fluid circulation flow path 51, so that the heat generated by the positive electric card refrigeration device 1 can be transferred to the hot end radiator 3 for heat dissipation.

[0053] When the electric field of the positive electric card refrigeration device 1 and the negative electric card refrigeration device 2 in the electric card refrigeration system is removed at the same time, the positive electric card refrigeration device 1 is in a heat absorption state, and is connected to the cold end radiator 4 through the first connecting pipe 61, so that the cold energy generated by the positive electric card refrigeration device 1 can be transferred to the cold end radiator 4, thereby playing a refrigeration function; the negative electric card refrigeration device 2 is in a heat release state, and is connected to the hot end radiator 3 through the second connecting pipe 62, so that the heat generated by the negative electric card refrigeration device 2 can be transferred to the hot end radiator 3 for heat dissipation.

[0054] It can be seen that the electric card refrigeration system provided by the embodiment of the present disclosure can simultaneously apply or remove the electric field to the positive electric card refrigeration device 1 and the negative electric card refrigeration device 2, and the corresponding refrigeration devices are connected to the cold end radiator 4, and the refrigeration function can be continuously exerted, thereby improving the refrigeration capacity of the electric card refrigeration system.

[0055] Optionally, the positive electric card refrigeration device 1 includes a first heat exchange shell and a positive electric card element. The first heat exchange shell encloses a first heat exchange cavity, and the first heat exchange cavity is connected to the first working medium circulation flow path 51 and the first connecting pipe 61. The positive electric card element is arranged in the first heat exchange cavity to exchange heat with the working medium in the first heat exchange cavity.

[0056] When the electric field is applied, the positive electric card element releases heat, the temperature rises, and heat is exchanged with the working fluid in the first heat exchange cavity. The temperature of the working fluid after the heat exchange rises, and a high-temperature working fluid is obtained, which flows into the hot-end radiator 3 through the first working fluid circulation flow path 51 for heat dissipation; when the electric field is removed, the positive electric card element absorbs heat, the temperature drops, and heat is exchanged with the working fluid in the first heat exchange cavity. The temperature of the working fluid after the heat exchange drops, and a low-temperature working fluid is obtained, which flows into the cold-end radiator 4 through the first connecting pipe 61 to exert a cooling effect.

[0057] The first heat exchange shell is provided with a first positive electric card connection terminal 11, a second positive electric card connection terminal 12, a third positive electric card connection terminal 13 and a fourth positive electric card connection terminal 14, and the first positive electric card connection terminal 11 and the third positive electric card connection terminal 13 can be positive electric card working fluid outflow terminals, and the second positive electric card connection terminal 12 and the fourth positive electric card connection terminal 14 can be positive electric card working fluid inflow terminals.

[0058] Optionally, the first heat exchange housing includes a first side plate and a second side plate opposite to each other, wherein the first positive electric card connection terminal 11 and the fourth positive electric card connection terminal 14 are arranged on the first side plate, and the second positive electric card connection terminal 12 and the third positive electric card connection terminal 13 are arranged on the second side plate. Optionally, the second positive electric card connection terminal 12 is arranged on the upper part of the first positive electric card connection terminal 11, and the fourth positive electric card connection terminal 14 is arranged on the upper part of the third positive electric card connection terminal 13.

[0059] Optionally, the first positive card connection terminal 11, the second positive card connection terminal 12, the third positive card connection terminal 13 and the fourth positive card connection terminal 14 are respectively provided with solenoid valves to control the opening or closing of the solenoid valves as needed.

[0060] Optionally, the negative electric card refrigeration device 2 includes a second heat exchange shell and a negative electric card element. The second heat exchange shell encloses a second heat exchange cavity and is connected to the second working medium circulation flow path 52 and the second connecting pipe 62. The negative electric card element is arranged in the second heat exchange cavity to exchange heat with the working medium in the second heat exchange cavity.

[0061] When the electric field is applied, the negative electric card element absorbs heat and exchanges heat with the working fluid in the second heat exchange cavity. The temperature of the working fluid after the heat exchange decreases and flows into the cold end radiator 4 to exert a cooling effect; when the electric field is removed, the negative electric card element absorbs heat and exchanges heat with the working fluid in the second heat exchange cavity. The temperature of the working fluid after the heat exchange increases and flows into the hot end radiator 3 to dissipate heat.

[0062] The second heat exchange shell is provided with a first negative electric card connection terminal 21, a second negative electric card connection terminal 22, a third negative electric card connection terminal 23 and a fourth negative electric card connection terminal 24, and the first negative electric card connection terminal 21 and the third negative electric card connection terminal 23 can be negative electric card working fluid outflow terminals, and the second negative electric card connection terminal 22 and the fourth negative electric card connection terminal 24 can be negative electric card working fluid inflow terminals.

[0063] Optionally, the second heat exchange shell includes a third side plate and a fourth side plate opposite to each other, wherein the first negative electric card connection terminal 21 and the fourth negative electric card connection terminal 24 are arranged on the third side plate, and the second negative electric card connection terminal 22 and the third negative electric card connection terminal 23 are arranged on the fourth side plate. Optionally, the second negative electric card connection terminal 22 is arranged on the upper part of the first negative electric card connection terminal 21, and the fourth negative electric card connection terminal 24 is arranged on the upper part of the third negative electric card connection terminal 23.

[0064] Optionally, the first negative power card connection terminal 21, the second negative power card connection terminal 22, the third negative power card connection terminal 23 and the fourth negative power card connection terminal 24 are respectively provided with solenoid valves to control the opening or closing of the solenoid valves as needed.

[0065] Optionally, the working fluid flowing in the refrigeration system composed of the first working fluid circulation flow path 51, the second working fluid circulation flow path 52, the first connecting pipe 61 and the second connecting pipe 62 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. For the sake of experiment or industrialization, transformer insulating heat-conducting oil is preferably used to achieve heat exchange.

[0066] Optionally, the hot end radiator 3 can be a tube-fin heat exchanger, a blown plate heat exchanger or a microchannel heat exchanger, etc. Similarly, the cold end radiator 4 can also be a tube-fin heat exchanger, a blown plate heat exchanger or a microchannel heat exchanger, etc. The embodiments of the present disclosure do not impose too many restrictions on the specific type of the radiator.

[0067] Optionally, the second working fluid circulation flow path 52 includes a cold end inlet pipe section 521 connected to the first negative electric card connection terminal 21 and the inlet end 41 of the cold end radiator, and a cold end outlet pipe section 522 connected to the second negative electric card connection terminal 22 and the outlet end 42 of the cold end radiator. Among them, the first connecting pipeline 61 includes a first cold end connecting section 611 connected to the third positive electric card connection terminal 13 and the cold end inlet pipe section 521, and a second cold end connecting section 612 connected to the fourth positive electric card connection terminal 14 and the cold end outlet pipe section 522.

[0068] The second working medium circulation flow path 52 is divided into a cold end inlet pipe section 521 and a cold end outlet pipe section 522. One end of the first connecting pipe 61 is connected to the third positive electric card connection end 13, and the other end is connected to the cold end inlet pipe section 521, so that the cold energy generated by the negative electric card refrigeration device 2 when the electric field is applied can be transferred to the cold end radiator 4.

[0069] Optionally, the cold end inlet pipe section 521 includes a first connection point connected to the first cold end connecting section 611, wherein the first connection point is provided with a first three-way valve 71. The cold end outlet pipe section 522 includes a second connection point connected to the second cold end connecting section 612, wherein the second connection point is provided with a second three-way valve 72.

[0070] The positive electric card refrigeration device 1 and the negative electric card refrigeration device 2 can be alternately connected to the cold end radiator 4 by controlling the first three-way valve 71 and the second three-way valve 72. For example, when the electric field is applied, the positive electric card refrigeration device 1 releases heat and the negative electric card refrigeration device 2 absorbs heat. At this time, the first three-way valve 71 and the second three-way valve 72 are controlled to connect the second working medium circulation flow path 52, so that the negative electric card refrigeration device 2 is connected to the cold end radiator 4 and the refrigeration function is exerted. When the electric field is removed, the positive electric card refrigeration device 1 absorbs heat and the negative electric card refrigeration device 2 releases heat. At this time, the first three-way valve 71 and the second three-way valve 72 are controlled to connect the first connecting pipeline 61, so that the positive electric card refrigeration device 1 is connected to the cold end radiator 4 and the refrigeration function is exerted.

[0071] Optionally, a first pump body is provided between the first three-way valve 71 of the cold end inlet pipe section 521 and the inlet end 41 of the cold end radiator. In this way, the flow velocity of the working medium in the second working medium circulation flow path 52 and the first connecting pipe 61 is increased, thereby improving the heat exchange efficiency of the cold end radiator 4.

[0072] Optionally, a first one-way valve 81 is provided between the first three-way valve 71 of the cold-end inlet pipe section 521 and the inlet end 41 of the cold-end radiator, and the conducting direction of the first one-way valve 81 is from the first three-way valve 71 to the inlet end 41 of the cold-end radiator. In this way, the one-way flowability of the working medium in the second working medium circulation flow path 52 and the first connecting pipeline 61 is improved.

[0073] Optionally, when the first pump body and the first check valve 81 are disposed between the first three-way valve 71 of the cold-end inlet pipe section 521 and the inlet end 41 of the cold-end radiator, the first check valve 81 is closer to the inlet end 41 of the cold-end radiator than the first pump body. In this way, the flow rate of the working medium flowing into the first check valve 81 is increased.

[0074] Optionally, the first working medium circulation flow path 51 includes a hot end inlet pipe section 511 and a hot end outlet pipe section 512. The hot end inlet pipe section 511 is connected to the first positive electric card connection end 11 and the inlet end 31 of the hot end radiator, and the hot end outlet pipe section 512 is connected to the second positive electric card connection end 12 and the outlet end 32 of the hot end radiator. Among them, the second connecting pipeline 62 includes a first hot end connecting section 621 connected to the third negative electric card connection end 23 and the hot end inlet pipe section 511, and a second hot end connecting section 622 connected to the fourth negative electric card connection end 24 and the hot end outlet pipe section 512.

[0075] The first working medium circulation flow path 51 is divided into a hot end inlet pipe section 511 and a hot end outlet pipe section 512. One end of the first hot end connecting section 621 is connected to the third negative electric card connection end 23, and the other end is connected to the hot end inlet pipe section 511, so that the cold energy generated by the negative electric card refrigeration device 2 when the electric field is applied can be transferred to the cold end radiator 4.

[0076] Optionally, the hot end inlet pipe section 511 includes a third connection point connected to the first hot end connecting section 621, wherein the third connection point is provided with a third three-way valve 74. The hot end outlet pipe section 512 includes a fourth connection point connected to the second hot end connecting section 622, wherein the fourth connection point is provided with a fourth three-way valve 73.

[0077] The third three-way valve 74 and the fourth three-way valve 73 can be controlled to alternately connect the positive electric card refrigeration device 1 and the negative electric card refrigeration device 2 to the hot end radiator 3. For example, when the electric field is applied, the positive electric card refrigeration device 1 releases heat and the negative electric card refrigeration device 2 absorbs heat. At this time, the third three-way valve 74 and the fourth three-way valve 73 are controlled to connect the first working medium circulation flow path 51, so that the positive electric card refrigeration device 1 is connected to the hot end radiator 3 and heat is dissipated, such as Figure 4 When the electric field is removed, the positive electric card refrigeration device 1 absorbs heat and the negative electric card refrigeration device 2 releases heat. At this time, the third three-way valve 74 and the fourth two-three-way valve are controlled to make the second connecting pipeline 62 conductive, so that the negative electric card refrigeration device 2 is connected to the hot end radiator 3 and dissipates heat. Figure 5 Shown by the solid line.

[0078] Understandably, Figure 4 and Figure 5 The implementation part is the refrigerant flow path.

[0079] Optionally, a second pump body is provided between the third three-way valve 74 of the hot end inlet pipe section 511 and the inlet end 31 of the hot end radiator. In this way, the flow velocity of the working medium in the first working medium circulation flow path 51 and the second connecting pipe 62 is increased, thereby improving the heat exchange efficiency of the hot end radiator 3.

[0080] Optionally, a second one-way valve 82 is provided between the third three-way valve 74 of the hot end inlet pipe section 511 and the inlet end 31 of the hot end radiator, and the conduction direction of the second one-way valve 82 is from the third three-way valve 74 to the inlet end 31 of the hot end radiator. In this way, the one-way fluidity of the working medium in the first working medium circulation flow path 51 and the second connecting pipeline 62 is improved.

[0081] Optionally, when the second pump body and the second one-way valve 82 are disposed between the third three-way valve 74 of the hot end inlet pipe section 511 and the inlet end 31 of the hot end radiator, the second one-way valve 82 is closer to the inlet end 31 of the hot end radiator than the second pump body. In this way, the flow rate of the working medium flowing into the second one-way valve 82 is increased.

[0082] The embodiment of the present disclosure also provides a household appliance.

[0083] Optionally, the household appliance includes the aforementioned electric card refrigeration system, and a housing of the household appliance, etc. Optionally, the household appliance includes refrigeration equipment such as a refrigerator, a freezer, and a display cabinet.

[0084] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An electric card refrigeration system, characterized in that: include: Positive electric card cooling device releases heat when the electric field is applied and absorbs heat when the electric field is removed; Negative electric card refrigeration device absorbs heat when the electric field is applied and releases heat when the electric field is removed; The first working medium circulation flow path has two ends respectively connected to the first positive electric card connection end and the second positive electric card connection end of the positive electric card refrigeration device, and the first working medium circulation flow path is provided with a hot end radiator; The second working medium circulation flow path has two ends respectively connected to the first negative electric card connection end and the second negative electric card connection end of the negative electric card refrigeration device, and the second working medium circulation flow path is provided with a cold end radiator; A first connecting pipe, both ends of which are respectively connected to the third positive electric card connection end and the fourth positive electric card connection end of the positive electric card refrigeration device, and the first connecting pipe is connected to the cold end radiator; and, The second connecting pipeline has two ends respectively connected to the third negative electric card connection end and the fourth negative electric card connection end of the negative electric card refrigeration device, and the second connecting pipeline is connected to the hot end radiator.

2. The electric card refrigeration system according to claim 1, characterized in that: The second working medium circulation flow path includes a cold end inlet pipe section connected to the first negative electric card connection end and the inlet end of the cold end radiator, and a cold end outlet pipe section connected to the second negative electric card connection end and the outlet end of the cold end radiator. Among them, the first connecting pipeline includes a first cold end connecting section connected to the third positive electric card connection end and the cold end inlet pipe section, and a second cold end connecting section connected to the fourth positive electric card connection end and the cold end outlet pipe section.

3. The electric card refrigeration system according to claim 2, characterized in that: The cold end inlet pipe section includes a first connecting point connected to the first cold end connecting section, wherein the first connecting point is provided with a first three-way valve; The cold end discharge pipe section includes a second connecting point connected to the second cold end connecting section, wherein the second connecting point is provided with a second three-way valve.

4. The electric card refrigeration system according to claim 3, characterized in that: A first pump body is arranged between the first three-way valve of the cold end inlet pipe section and the inlet end of the cold end radiator; or, A first one-way valve is arranged between the first three-way valve of the cold end inlet pipe section and the inlet end of the cold end radiator, and the conducting direction of the first one-way valve is from the first three-way valve to the inlet end of the cold end radiator.

5. The electric card refrigeration system according to claim 2, characterized in that: The first working medium circulation flow path includes a hot end inlet pipe section connected to the first positive electric card connection end and the inlet end of the hot end radiator, and a hot end outlet pipe section connected to the second positive electric card connection end and the outlet end of the hot end radiator. Among them, the second connecting pipeline includes a first hot end connecting section connected to the third negative electric card connection end and the hot end inlet pipe section, and a second hot end connecting section connected to the fourth negative electric card connection end and the hot end outlet pipe section.

6. The electric card refrigeration system according to claim 5, characterized in that: The hot end inlet pipe section includes a third connecting point connected to the first hot end connecting section, wherein the third connecting point is provided with a third three-way valve; The hot end discharge pipe section includes a fourth connecting point connected to the second hot end connecting section, wherein the fourth connecting point is provided with a fourth three-way valve.

7. The electric card refrigeration system according to claim 6, characterized in that: A second pump body is provided between the third three-way valve of the hot end inlet pipe section and the inlet end of the hot end radiator; or, A second one-way valve is arranged between the third three-way valve of the hot end inlet pipe section and the inlet end of the hot end radiator, and the conducting direction of the second one-way valve is from the third three-way valve to the inlet end of the hot end radiator.

8. The electric card refrigeration system according to any one of claims 1 to 7, characterized in that: Positive electric card cooling devices include: A first heat exchange shell encloses a first heat exchange cavity and is connected to the first working medium circulation flow path and the first connecting pipeline; and, The positive electric card element is arranged in the first heat exchange cavity and exchanges heat with the working medium in the first heat exchange cavity.

9. The electric card refrigeration system according to any one of claims 1 to 7, characterized in that: Negative charge card refrigeration devices include: A second heat exchange shell encloses a second heat exchange chamber and is connected to the second working medium circulation flow path and the second connecting pipeline; and, The negative charge card element is arranged in the second heat exchange cavity and exchanges heat with the working medium in the second heat exchange cavity.

10. A household appliance, characterized in that: It comprises the electric card refrigeration system as described in any one of claims 1 to 9.

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