An adsorption type thermoelectric switch

Abstract

The present invention provides an adsorption type thermoelectric switch, comprising: a fixed element, a moving element, a heat load and a flexible element; the flexible element is filled with an adsorbent and an adsorbate, the two ends of the flexible element are respectively connected to the moving element and the fixed element, the fixed element and the heat load are arranged at intervals, the moving element passes through the flexible element and the fixed element in sequence, and the moving element is separated from or contacts the heat load as the temperature of the flexible element changes. The adsorption type thermoelectric switch provided by the present invention uses a flexible element as a connector, which is respectively connected to the moving element and the fixed element, and is filled with an adsorbent and an adsorbate. The relationship between physical adsorption and temperature is used to adjust the volume of gas in the flexible element, so that the flexible element is expanded and contracted, and the moving element is driven to approach / move away from the heat load to realize the on and off of the current path, and the automatic control of the heating process can be realized without additional manual operation, which effectively improves the safety of the heating device controlled by it and avoids overheating failure.

Description

Technical Field

[0001] The invention relates to the technical field of heat flow path control, and in particular to an adsorption type thermoelectric switch. Background Art

[0002] The current energy structure is still dominated by traditional fossil energy, but the supply and demand relationship between high-quality electricity generated by the combustion of fossil energy and the user end is somewhat unstable in the time or space dimensions.

[0003] Therefore, energy storage technology has become an important means to solve the discontinuous energy consumption at the user end and maintain the balance between supply and demand. The heat storage technology is mainly used in the fields of power system peak regulation, solar power generation, heating, etc. One of the commonly used heat storage technologies is to use electric heating to heat up the heat storage material, store heat, and release and use the heat when a specific user needs heat at a specific time. Among them, the resistance heating technology has hidden dangers such as short circuit and overheating caused by too long heating time, which in turn damages the equipment. In order to ensure the safety of the system, a thermoelectric switch is usually used or an additional PID temperature control system is added to monitor the temperature. When the temperature is higher than the design value, the current path is disconnected and the heating is stopped. When the temperature is lower than the design value, the current is turned on and heating begins. These are the keys to ensure the safe operation of the electric heating device.

[0004] At present, the thermoelectric switches that control temperature by controlling the on and off of current mainly include bimetallic and ceramic-ferromagnetic structures. However, these two structures are relatively complex and difficult to process. The ceramic-ferromagnetic structure cannot be automatically controlled and requires the user to press a button when using it, and cannot automatically turn on the heating. In addition, additional thermometers, signal receivers and other devices are added to the existing system, and PID technology is used for temperature control, but this will also increase the complexity of the system. Summary of the invention

[0005] The embodiment of the present invention provides an adsorption type thermoelectric switch, which is used to simplify the structure of the thermoelectric switch, realize automatic opening / closing of the heating process, and ensure the safe operation of the heating device.

[0006] An embodiment of the present invention provides an adsorption type thermoelectric switch, comprising:

[0007] Fixed elements, moving elements, thermal loads, and flexible elements;

[0008] The flexible element is filled with an adsorbent and an adsorbate, and both ends of the flexible element are respectively connected to the moving element and the fixed element. The fixed element and the heat load are spaced apart, and the moving element passes through the flexible element and the fixed element in sequence. The moving element is separated from or contacts the heat load as the temperature of the flexible element changes.

[0009] According to the adsorption type thermoelectric switch of one embodiment of the present invention, the moving element is separated from the heat load when the temperature of the flexible element is higher than a preset value.

[0010] According to an adsorption-type thermoelectric switch of one embodiment of the present invention, the adsorption amount of the adsorbent is negatively correlated with the temperature within a set temperature range. At high temperature, the adsorbate (generally gas) is desorbed and the gas volume increases. When the flexible element expands to a length greater than or equal to a preset length, the movable element is separated from the heat load.

[0011] According to an adsorption-type thermoelectric switch of an embodiment of the present invention, when the flexible element contracts to a length less than a preset length at low temperature, the moving element contacts the heat load.

[0012] According to an adsorption type thermoelectric switch of an embodiment of the present invention, a channel for the moving element to pass through is provided in the flexible element; and a contact end of the moving element is movably disposed between the fixed element and the heat load.

[0013] According to an adsorption type thermoelectric switch of one embodiment of the present invention, the moving element comprises: a first transverse structure, a second transverse structure and a longitudinal structure;

[0014] The first transverse structure is connected to the flexible element; the longitudinal structure is movably arranged in the channel and the fixed element, the first end of the longitudinal structure is connected to the first transverse structure, the second end of the longitudinal structure is connected to the second transverse structure, and the second transverse structure is in contact with the heat load when the temperature of the flexible element is lower than a preset value.

[0015] An embodiment of the present invention further provides an adsorption-type thermoelectric switch, wherein the fixing element is provided with a through hole adapted to the longitudinal structure, the longitudinal structure is movably disposed in the through hole, and the longitudinal structure is always in contact with the side wall of the through hole.

[0016] According to the adsorption type thermoelectric switch of one embodiment of the present invention, the moving element and the heat load are made of heat-conductive metal, and the fixed element is made of insulating material.

[0017] According to an adsorption-type thermoelectric switch according to an embodiment of the present invention, the moving element and the heat load are made of any one of gold, silver or copper.

[0018] According to an adsorption-type thermoelectric switch of one embodiment of the present invention, the flexible element is a bellows, and the adsorbent is a combination of one or more of activated carbon and zeolite.

[0019] The adsorption-type thermoelectric switch provided by the present invention adopts a flexible element as a connector, which is respectively connected to a moving element and a fixed element. The interior is filled with an adsorbent and an adsorbate. The relationship between physical adsorption and temperature is used to adjust the volume of gas in the flexible element, so that the flexible element expands and contracts, driving the moving element to approach / move away from the heat load, realizing the on and off of the current path. The heating process can be automatically controlled without additional manual operation, effectively improving the safety of the heating device controlled by it and avoiding overheating failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of the connection state of an adsorption-type thermoelectric switch provided by an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a disconnected state of an adsorption-type thermoelectric switch provided by an embodiment of the present invention;

[0023] 1. Moving element; 2. Adsorbent and adsorbate; 3. Flexible element; 4. Fixed element; 5. Heat load. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Combine the following Figure 1 and Figure 2 The adsorption type thermoelectric switch provided by the embodiment of the present invention is described. The adsorption type thermoelectric switch comprises: a fixed element 4 , a moving element 1 , a heat load 5 and a flexible element 3 .

[0026] The flexible element 3 is filled with adsorbent and adsorbate 2. Both ends of the flexible element 3 are connected to the moving element 1 and the fixed element 4 respectively. The fixed element 4 is spaced apart from the heat load 5. The moving element 1 passes through the flexible element 3 and the fixed element 4 in sequence. The moving element 1 is separated from or contacts the heat load 5 as the temperature of the flexible element 3 changes.

[0027] In this embodiment, when the temperature of the flexible element 3 is lower than a preset value, the moving element 1 contacts the heat load 5. Figure 1 As shown, the thermoelectric switch is in the on state. When the temperature of the flexible element 3 is higher than a preset value, the moving element 1 is separated from the heat load 5 .

[0028] The adsorption type thermoelectric switch provided in this embodiment is in a closed state. Figure 1 As shown, in the on state, the moving element 1 contacts the heat load 5, the circuit is turned on, and the heating device starts heating. Figure 2 As shown, when the temperature of the moving element 1 is higher than the design value, the heat is transferred to the flexible element 3 through the moving element 1, and the temperature of the adsorbent and adsorbate 2 filled in the flexible element 3 rises. At high temperature, the adsorption amount of the adsorbent on the adsorbate (the adsorbate is generally a gas) is reduced, part of the adsorbate is desorbed, and the gas is heated and expanded, the length of the flexible element 3 increases, and the moving element 1 is pushed away from the heat load 5, the current path is disconnected, and the heating stops. When the temperature of the moving element 1 is lower than the set value, the temperature of the flexible element 3 in thermal contact with it is lower, the flexible element 3 begins to shrink, and the length is reduced. Since one end of the flexible element 3 is already connected to the fixed element 4 and cannot move, the flexible element 3 pushes the moving element 1 to contact the heat load 5, the current path is turned on, the heating device is started, the heat load 5 is heated again, and the heat is transferred to the moving element 1, and the moving element 1 is heated to the set value. The heat is transferred to the flexible element 3 again through the moving element 1, and the flexible element 3 is heated and expanded again. In this way, according to the characteristics of the adsorbent and adsorbate 2 in the flexible element 3, automatic switching / closing can be achieved without external manual detection and operation.

[0029] The adsorption-type thermoelectric switch provided by the present invention adopts a flexible element as a connector, which is respectively connected to a moving element and a fixed element. The interior is filled with an adsorbent and an adsorbate. The relationship between physical adsorption and temperature is used to adjust the volume of gas in the flexible element, so that the flexible element expands and contracts, driving the moving element to approach / move away from the heat load, realizing the on and off of the current path. The heating process can be automatically controlled without additional manual operation, effectively improving the safety of the heating device controlled by it and avoiding overheating failures.

[0030] Based on the above embodiment, the present invention also provides an embodiment, such as Figure 1 and Figure 2 As shown, the flexible element 3 is a bellows made of a material with good thermal conductivity. The adsorbent inside can be a combination of activated carbon, zeolite, etc. The adsorbent particle size and filling method are adjusted according to actual conditions. The adsorbent is a safe, non-explosive, non-toxic gas. The volume in the bellows is changed according to the change in the specific volume of the adsorbent at different temperatures and the different adsorption amounts of the gas by the adsorbent at different temperatures.

[0031] Generally, the adsorption amount of the adsorbent is negatively correlated with the temperature within a set temperature range. When the flexible element 3 expands at high temperature to a length greater than or equal to a preset length, the moving element 1 is separated from the heat load 5. When the flexible element 3 contracts at low temperature to a length less than a preset length, the moving element 1 is in contact with the heat load 5.

[0032] In addition, metal powder can be added to the adsorbent inside the bellows to enhance the heat transfer characteristics of the adsorbent.

[0033] Correspondingly, the heat load 5 and the moving element 1 should be made of metal materials with good thermal conductivity, such as gold, silver, copper (red copper) and other metal materials.

[0034] In this embodiment, a channel is provided in the flexible element 3 for the moving element 1 to pass through. The flexible element 3 can move in the channel, and the contact end of the moving element 1 can be movably arranged between the fixed element 4 and the heat load 5.

[0035] In order to ensure the reliability and sensitivity of the switch, the fixed element 4 is made of insulating material with poor thermal conductivity. The flexible element 3 is located between the moving element 1 and the fixed element 4, which can prevent the flexible element 3 from directly contacting and transferring heat with other external structures.

[0036] The movable element 1 includes: a first transverse structure, a second transverse structure and a longitudinal structure. The first transverse structure is connected to the flexible element 3. The longitudinal structure is movably arranged in the channel and the fixed element 4, the first end of the longitudinal structure is connected to the first transverse structure, the second end of the longitudinal structure is connected to the second transverse structure, and the second transverse structure is in contact with the heat load 5 when the temperature of the flexible element 3 is lower than a preset value.

[0037] Correspondingly, a through hole matching the longitudinal structure is provided on the fixing element 4, and the longitudinal structure is movably arranged in the through hole. During the whole process of contraction and expansion of the flexible element 3, the longitudinal structure is always in contact with the side wall of the through hole.

[0038] In summary, the adsorption-type thermoelectric switch provided in the embodiment of the present invention adopts a flexible element as a connector, which is respectively connected to the movable element and the fixed element, and is filled with an adsorbent and an adsorbate. The relationship between physical adsorption and temperature is used to adjust the volume of the gas in the flexible element, so that the flexible element expands and contracts, driving the movable element to approach / move away from the heat load, thereby realizing the on and off of the current path. The heating process can be automatically controlled without additional manual operation, thereby effectively improving the safety of the heating device controlled by it and avoiding overheating failures.

[0039] In addition, the adsorption-type thermoelectric switch is different from the prior art in that it only includes a fixed element, a movable element, a heat load, a flexible element, and an adsorbent and an adsorbate filled in the flexible element, and has a simple and reliable structure.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adsorption type thermoelectric switch, characterized in that: include: Fixed elements, moving elements, thermal loads, and flexible elements; The flexible element is filled with an adsorbent and an adsorbate, two ends of the flexible element are respectively connected to the moving element and the fixed element, the fixed element and the heat load are spaced apart, the moving element passes through the flexible element and the fixed element in sequence, and the moving element is separated from or in contact with the heat load as the temperature of the flexible element increases; The adsorption amount of the adsorbent is negatively correlated with the temperature within a set temperature range. At high temperature, the adsorbate is desorbed and the gas volume increases. When the flexible element expands to a length greater than or equal to a preset length, the moving element is separated from the heat load. The moving element and the heat load are made of heat-conductive metal, and the fixed element is made of insulating material.

2. The adsorption type thermoelectric switch according to claim 1, characterized in that: The moving element is separated from the heat load when the temperature of the flexible element is higher than a preset value.

3. The adsorption type thermoelectric switch according to claim 1, characterized in that: When the flexible element contracts at low temperature to a length less than a preset length, the moving element contacts the heat load.

4. The adsorption type thermoelectric switch according to any one of claims 1 to 3, characterized in that: The flexible element is provided with a channel for the moving element to pass through; the contact end of the moving element is movably arranged between the fixed element and the heat load.

5. The adsorption type thermoelectric switch according to claim 4, characterized in that: The moving element comprises: a first transverse structure, a second transverse structure and a longitudinal structure; The first transverse structure is connected to the flexible element; the longitudinal structure is movably arranged in the channel and the fixed element, the first end of the longitudinal structure is connected to the first transverse structure, the second end of the longitudinal structure is connected to the second transverse structure, and the second transverse structure is in contact with the heat load when the temperature of the flexible element is lower than a preset value.

6. The adsorption type thermoelectric switch according to claim 5, characterized in that: The fixing element is provided with a through hole matched with the longitudinal structure. The longitudinal structure is movably arranged in the through hole. The longitudinal structure is always in contact with the side wall of the through hole.

7. The adsorption type thermoelectric switch according to claim 1, characterized in that: The moving element and the heat load are made of any one of gold, silver or copper.

8. The adsorption type thermoelectric switch according to claim 1, characterized in that: The flexible element is a bellows, and the adsorbent is a combination of one or more of activated carbon and zeolite.

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