Electrochemical sensor heating shell and electrochemical sensor
By integrating a carbon nanotube heating layer and a thermal insulation layer inside or outside the electrochemical sensor housing, the problem of low heating efficiency in low-temperature environments is solved, sensor performance is improved and the structure is simplified, making it suitable for a variety of sensor models.
Patent Information
- Application Number
- CN202422788262.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-15
AI Technical Summary
Existing electrochemical sensors have low heating efficiency, uneven heating, slow heating speed and large structural space in low-temperature environments, which affects sensor performance and accuracy.
The carbon nanotube heating layer and outer shell layer structure are combined with the thermal insulation layer to provide a stable and uniform temperature field environment through the carbon nanotube heating layer. It is integrated on the inside or outside of the electrochemical sensor shell and uses the high thermal conductivity and electrical conductivity of carbon nanotubes for heating.
It improves the performance of electrochemical sensors in low temperature environments, simplifies the structure, reduces calculation errors and maintenance costs, and is suitable for a variety of sensor models.
Smart Images
Figure CN223402680U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrochemical sensors, in particular to an electrochemical sensor heating shell and an electrochemical sensor. Background Art
[0002] Electrochemical sensors, based on ionic conductivity, are devices that convert electrochemical information into measurable analytical signals. Due to their high sensitivity, high selectivity, low detection limits, and portability, they are widely used in environmental monitoring, life sciences, healthcare, food safety, automotive, and other fields. Electrochemical sensors generally consist of electrodes and an ionic conductive electrolyte. The gas to be measured undergoes an electrochemical reaction at the sensing electrode, and the resulting ion products are transported through the electrolyte to the counter electrode for oxidation or reduction. The migration of ions and electrons in the electrolyte generates an electric current, which is proportional to the concentration of the gas to be measured. The concentration of the gas to be measured is determined by the magnitude of the current signal.
[0003] Currently, the sizes of electrochemical sensors on the market are highly uniform, with most being 4-series (φ20mm, H16.6mm) three-electrode structures, some 4-series two-electrode structures or 4-series four-electrode structures, and the slightly larger 7-series (φ31.5mm, H16.8mm) four-electrode structures. In addition, there are larger or mini-sized sensor structures customized according to the detector product requirements of different manufacturers, but compared to the 4-series size, they are less used.
[0004] Electrolytes are typically aqueous solutions. Therefore, phenomena such as water loss in dry environments, water absorption in humid environments, and condensation at low temperatures can affect sensor performance and accuracy. When electrochemical sensors are used in low-temperature environments, condensation in the electrolyte is prone to occur, slowing the migration of electrons and ions. Furthermore, low temperatures slow the reaction rate at the electrodes, leading to slow response, decreased sensitivity, and large detection errors. Common measures to address sensor performance issues caused by low temperatures include: algorithmic compensation (using an internal temperature sensor to monitor the sensor's operating temperature in real time and adjusting the compensation coefficient accordingly to mitigate errors caused by sensitivity loss due to low temperatures); adding heating elements (usually externally welded thermistors or heating wires to increase the sensor's operating temperature); optimizing material selection (for example, using electrolyte and electrode materials with good temperature stability to improve sensor performance in low-temperature environments); and regular calibration and maintenance. Each of these improvement measures has its advantages and disadvantages, including increased cost, computational errors, and increased detector complexity. Therefore, the best approach is to combine multiple solutions to maximize their strengths and minimize their weaknesses. However, the existing "adding heating elements" solution has problems such as low heating efficiency, uneven heating, slow heating speed, and excessive space occupied by the structure.
[0005] Carbon is a unique element because it exists in many different allotropes. These forms exhibit distinct physical properties due to the different arrangements of their carbon atoms. There are four main carbon allotropes: graphite, diamond, fullerenes, and graphene. Carbon nanotubes (CNTs) are seamless nanotubes composed of single or multiple layers of graphite sheets coiled around a central axis at a specific helical angle. Depending on the number of graphite sheets in the tube, they can be categorized as single-walled CNTs (SWNTs) or multi-walled CNTs (MWNTs). CNTs possess excellent thermal conductivity, with multi-walled CNTs boasting approximately 3000 W / (m•K) and single-walled CNTs approximately 2000 W / (m•K), and exhibit extremely high thermal stability. Even a minimal amount of conductive carbon nanomaterial can create a conductive network within a composite matrix, generating significant Joule heating when current passes through the CNT network. Macroscopic graphene films, carbon nanotube paper, and carbon nanotube films can also build a good conductive network in the composite matrix, with the characteristics of instantaneous response to heating, good conformability, and uniform heating.
[0006] ABS resin is a typical thermoplastic resin with a two-phase structure, consisting of a continuous SAN phase and a dispersed PB phase. The PB phase, through grafting with some SAN monomers, forms good interfacial adhesion with the ungrafted SAN phase matrix and promotes uniform dispersion of the PB dispersed phase particles within the SAN matrix. ABS combines the excellent properties of each component. In ABS resin, A represents acrylonitrile, which provides ABS resin with excellent thermal stability and chemical resistance; B represents butadiene, which imparts good impact resistance; and S represents styrene, which imparts rigidity, ease of processing, and surface gloss. The three components of ABS have their own unique properties. By adjusting the proportions of each component, different types and specifications of ABS resin can be produced to meet the needs of the application and environment. The structure of electrochemical sensor housings is based on the specific application requirements and is often made of ABS material. Utility Model Content
[0007] The purpose of the utility model is to provide an electrochemical sensor heating shell and an electrochemical sensor to address the problems of low heating efficiency, uneven heating, slow heating speed, and excessive space occupation in the existing "adding heating elements" solution.
[0008] In order to achieve the above purpose, the technical solution adopted by the present utility model is:
[0009] The first aspect of the present invention provides an electrochemical sensor heating housing, comprising a cylindrical housing for arranging the electrode layers and ion conductor electrolyte assembly of the electrochemical sensor, the bottom of the cylindrical housing being provided with electrode pins of the electrochemical sensor, and further comprising a carbon nanotube heating layer and a housing layer sequentially arranged from the outside of the cylindrical housing;
[0010] The outer shell layer plays a supporting role;
[0011] The carbon nanotube heating layer plays a heating role;
[0012] The carbon nanotube heating layer is integrated on the inner side of the outer shell layer or the outer side of the cylindrical shell, and positive and negative connectors for connecting to a power supply are provided at both ends of the carbon nanotube heating layer;
[0013] The carbon nanotube heating layers are close to but not in contact with the positive and negative joints.
[0014] Based on the above, a thermal insulation layer is provided between the outer shell layer and the carbon nanotube heating layer to reduce heat energy loss.
[0015] Based on the above, the positive and negative connectors of the carbon nanotube heating layer are copper conductive rods, and each copper conductive rod is led to the corresponding heating electrode arranged at the bottom of the column shell through a copper wire, silver wire or other conductive material.
[0016] Based on the above, the two copper conductive rods are separated by the outer shell layer in an inclined angle or convex shape.
[0017] A second aspect of the present invention provides an electrochemical sensor heating housing, comprising a cylindrical housing for sleeved onto the outside of the electrochemical sensor, the cylindrical housing having holes at the bottom thereof reserved for receiving electrode pins of the electrochemical sensor, the cylindrical housing further comprising a carbon nanotube heating layer for heating, and a supporting and protective layer for supporting and protecting the carbon nanotube heating layer;
[0018] The carbon nanotube heating layer is integrated on the inner side wall of the cylindrical shell, and positive and negative connectors for connecting to a power supply are provided at both ends of the carbon nanotube heating layer;
[0019] The carbon nanotube heating layer is close to but not in contact with the positive and negative joints;
[0020] The supporting protection layer is arranged around the inner side of the carbon nanotube heating layer.
[0021] Based on the above, a thermal insulation layer is provided between the inner side wall of the column shell and the carbon nanotube heating layer, and the carbon nanotube heating layer is integrated inside the thermal insulation layer.
[0022] Based on the above, the positive and negative connectors of the carbon nanotube heating layer are copper conductive rods, and each copper conductive rod is led to the corresponding heating electrode arranged at the bottom of the column shell through a copper wire, silver wire or other conductive material.
[0023] Based on the above, the two copper conductive rods are separated by the cylindrical shell in an inclined angle or convex shape.
[0024] A third aspect of the present invention provides an electrochemical sensor, comprising the electrochemical sensor heating housing, the electrochemical sensor electrode layers and ion conductor electrolyte assembly arranged inside the cylindrical housing of the electrochemical sensor heating housing, and electrode pins arranged at the bottom of the cylindrical housing and connected to the electrode layers of the electrochemical sensor.
[0025] A fourth aspect of the present invention provides an electrochemical sensor, comprising the electrochemical sensor heating shell and an electrochemical sensor body in which the holes for the electrode pins to pass through the cylindrical shell are arranged inside the electrochemical sensor heating shell.
[0026] This utility model has substantial features and progress compared to the prior art. Specifically,
[0027] In one solution of the utility model, the electrochemical sensor heating shell is directly made into one body with the electrochemical sensor, which can provide the electrochemical sensor with a stable and uniform temperature field environment, improve the product performance of the electrochemical sensor when applied in a low-temperature environment, simplify the detector structure of the electrochemical sensor when applied in a low-temperature place, reduce the calculation error caused by the excessive compensation coefficient of the low-temperature algorithm, and save the cost increase caused by changing materials, frequent calibration and maintenance.
[0028] Another solution of the utility model is that the electrochemical sensor heating shell adopts an independent heating shell, which not only solves the problem of providing a stable and uniform temperature field environment, but is also compatible with a variety of sensor models with matching sizes and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 Schematic diagram of the longitudinal structure of the electrochemical sensor heating shell in Example 1.
[0030] Figure 2 Schematic diagram of the cylindrical material layer of the electrochemical sensor heating shell in Example 1.
[0031] Figure 3 1 is a schematic diagram of the bottom cross-sectional structure of the heating housing of the 4-series electrochemical sensor in Example 1.
[0032] Figure 4 This is a schematic diagram of the bottom cross-sectional structure of the heating shell of the 7-series electrochemical sensor in Example 1.
[0033] Figure 5 Schematic diagram of the longitudinal structure of the electrochemical sensor heating shell in Example 2.
[0034] Figure 6 Schematic diagram of the cylindrical material layer of the electrochemical sensor heating shell in Example 2.
[0035] Figure 7 This is a schematic diagram of the bottom cross-sectional structure of the electrochemical sensor heating housing applicable to the 4-series electrochemical sensor in Example 2.
[0036] Figure 8 This is a schematic diagram of the bottom cross-sectional structure of the electrochemical sensor heating housing applicable to the 7-series electrochemical sensor in Example 2.
[0037] Figure 9 Schematic diagram of the longitudinal structure of the electrochemical sensor in Example 3.
[0038] Figure 10 Schematic diagram of the longitudinal structure of the electrochemical sensor in Example 4.
[0039] In the figure: cylindrical shell 1; hole 2; carbon nanotube heating layer 3; shell layer 4; positive connector 5; negative connector 6; H+ heating electrode 7; H- heating electrode 8; insulation layer 9; supporting protective layer 10; working electrode 11, reference electrode 12, counter electrode 13; ion conductor electrolyte 14; electrode pin 15; electrochemical sensor body 16. DETAILED DESCRIPTION
[0040] In order to make the implementation purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is clearly and completely described below.
[0041] Example 1
[0042] like Figure 1-Figure 4 As shown, this embodiment provides an electrochemical sensor heating housing, comprising a cylindrical housing 1 for arranging the electrode layers and ion conductor electrolyte assembly of the electrochemical sensor, an electrode pin 15 of the electrochemical sensor being arranged at the bottom of the cylindrical housing 1, and a carbon nanotube heating layer 3 and a housing layer 4 being sequentially arranged from the outside of the cylindrical housing 1;
[0043] The outer shell 4 plays a supporting role;
[0044] The carbon nanotube heating layer 3 plays a heating role;
[0045] The carbon nanotube heating layer 3 is integrated inside the outer shell 4 or outside the cylindrical shell 1, and a positive connector 5 and a negative connector 6 for connecting to a power supply are provided at both ends of the carbon nanotube heating layer 3;
[0046] The carbon nanotube heating layer 3 is close to the positive terminal 5 and the negative terminal 6 but not in contact with them.
[0047] Specifically, the positive terminal 5 and the negative terminal 6 of the carbon nanotube heating layer 3 are both copper conductive rods, which are connected to the corresponding H+ heating electrode 7 and H- heating electrode 8 arranged at the bottom of the column shell 1 through copper wire, silver wire or other conductive materials. The connecting wires between the copper conductive rods and the heating electrodes are preferably designed to be on the same layer as the carbon nanotube heating layer 3, and are isolated from the ion conductor electrolyte and the like by the column shell 1. If the connecting wires are designed to facilitate later maintenance, they can be designed inside the column shell 1 and come into contact with the electrochemical environment such as the ion conductor electrolyte. In this case, the connecting wires and the exposed copper conductive rods must have anti-oxidation and corrosion resistance properties.
[0048] The carbon nanotube heating layer 3 in this embodiment mainly utilizes the electrothermal characteristics of the carbon nanotube material. By supplying power to the carbon nanotube composite film and heating the carbon nanotube composite film, the heat can be transferred to the electrode layers of the electrochemical sensor and the ion conductor electrolyte assembly in the column shell 1, thereby achieving the purpose of heating.
[0049] In some exemplary embodiments, utilizing the conductivity characteristics of carbon nanotube materials, the connecting wire between the copper conductive rod and the heating electrode can be a layer of carbon nanotube material laid at the bottom of the column shell 1, or it can be a carbon nanotube material only integrated at the position of the connecting wire between the copper conductive rod and the heating electrode at the bottom of the column shell 1.
[0050] In some exemplary embodiments, two copper conductive bars are separated by the outer shell layer 4 in an inclined angle or convex shape.
[0051] In some exemplary embodiments, an insulation layer 9 is provided between the outer shell and the carbon nanotube heating layer to reduce heat loss. The insulation layer 9 can be selectively designed, and its thickness, material, and fixing method can be adjusted. A thin and insulating ceramic insulation layer or a metal oxide layer is preferred.
[0052] In some exemplary embodiments, the column shell and the shell layer are preferably made of ABS resin, but it is not fixed. The material only needs to meet the following requirements: insulation, corrosion resistance, non-deformation, light weight, resistance to certain high and low temperatures, etc. The thickness can be as thin as possible while ensuring that the shape is not easily changed and resistance to internal electrolyte corrosion is achieved.
[0053] The size of the electrochemical sensor heating housing of this embodiment can be adjusted and customized according to customer needs. Generally, 4 series and 7 series sizes are more commonly used.
[0054] Example 2
[0055] like Figure 5-Figure 8As shown, this embodiment provides an electrochemical sensor heating housing, comprising a cylindrical housing 1 for being mounted on the outside of the electrochemical sensor, a hole 2 reserved at the bottom of the cylindrical housing 1 for inserting the electrode pins of the electrochemical sensor, a carbon nanotube heating layer 3 for heating, and a supporting and protective layer 10 for supporting and protecting the carbon nanotube heating layer 3;
[0056] The carbon nanotube heating layer 3 is integrated on the inner wall of the cylindrical shell 1, and a positive connector 5 and a negative connector 6 for connecting to a power supply are provided at both ends of the carbon nanotube heating layer 3;
[0057] The carbon nanotube heating layer 3 is close to but not in contact with the positive terminal 5 and the negative terminal 6;
[0058] The supporting protective layer 10 is disposed around the inner side of the carbon nanotube heating layer 3 .
[0059] Specifically, the positive terminal 5 and the negative terminal 6 of the carbon nanotube heating layer 3 are both copper conductive rods, which are connected to the corresponding H+ heating electrode 7 and H- heating electrode 8 arranged at the bottom of the cylindrical shell 1 through copper wire, silver wire, or other conductive materials. The connecting wires between the copper conductive rods and the heating electrodes can be designed on the inner side of the bottom of the cylindrical shell 1 and covered with a thin insulating gasket such as glass fiber fabric or EVA film to protect the connecting wires and facilitate maintenance during later use.
[0060] In some exemplary embodiments, two copper conductive rods are separated by the cylindrical housing 1 in an inclined angle or convex shape.
[0061] In some exemplary embodiments, an insulation layer 9 is disposed between the inner sidewall of the cylindrical shell and the carbon nanotube heating layer, and the carbon nanotube heating layer is integrated into the inner side of the insulation layer. The insulation layer 9 can be selectively designed, and its thickness, material, and fixing method can be adjusted. Preferably, it is a thin and insulating ceramic insulation layer or a metal oxide layer. The insulation layer can be fixed to the inner sidewall of the cylindrical shell by adhesion or thermal curing, and the carbon nanotube heating layer is preferably evenly laid and fixed to the inner side of the insulation layer by thermal curing.
[0062] In some exemplary embodiments, the column housing is preferably made of ABS resin, but this is not a fixed material. Any material that meets the following requirements, such as insulation, corrosion resistance, deformation resistance, light weight, and resistance to certain high and low temperatures, can be used. The thickness can be as thin as possible while ensuring that the shape is not easily deformed and that it resists corrosion from the internal electrolyte. The supporting protective layer is preferably made of fiberglass fabric.
[0063] The size of the electrochemical sensor heating housing of this embodiment can be adjusted and customized according to customer needs. Generally, 4 series and 7 series sizes are more commonly used.
[0064] Example 3
[0065] This embodiment provides an electrochemical sensor, such as Figure 9 As shown, it includes the electrochemical sensor heating shell described in Example 1, the electrochemical sensor electrode layers (working electrode 11, reference electrode 12, counter electrode 13) and ion conductor electrolyte 14 arranged inside the cylindrical shell of the electrochemical sensor heating shell, and the electrode pin 15 arranged at the bottom of the cylindrical shell 1 and connected to the electrode layers of the electrochemical sensor.
[0066] In some exemplary embodiments, the positions of the H+ heating electrode 7 and the H- heating electrode 8 are preferably designed to be symmetrical about the central axis of the bottom of the column shell 1 relative to the working electrode 11. The angle between the H+ heating electrode 7 and the H- heating electrode 8 is preferably 60° or 90°, and can also be adjusted according to customer customization requirements.
[0067] Example 4
[0068] This embodiment provides an electrochemical sensor, such as Figure 10 As shown, it includes the electrochemical sensor heating shell described in Example 2, and the electrochemical sensor body 16 in which the holes for the electrode pins to pass through the cylindrical shell are arranged inside the electrochemical sensor heating shell.
[0069] In some exemplary embodiments, the positions of the H+ heating electrode 7 and the H- heating electrode 8 are preferably designed to be symmetrical about the central axis of the bottom of the cylindrical shell 1 relative to the reserved hole 2. The angle between the H+ heating electrode 7 and the H- heating electrode 8 is preferably 60° or 90°, and can also be adjusted according to customer customization requirements.
[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A heating housing for an electrochemical sensor, comprising a cylindrical housing for arranging the electrode layers and ion conductor electrolyte assembly of the electrochemical sensor, wherein the bottom of the cylindrical housing is provided with electrode pins of the electrochemical sensor, characterized in that: It also includes a carbon nanotube heating layer and an outer shell layer arranged in sequence from the outer side of the column shell; The outer shell layer plays a supporting role; The carbon nanotube heating layer plays a heating role; The carbon nanotube heating layer is integrated on the inner side of the outer shell layer or the outer side of the cylindrical shell, and positive and negative connectors for connecting to a power supply are provided at both ends of the carbon nanotube heating layer; The carbon nanotube heating layers are close to but not in contact with the positive and negative joints.
2. The electrochemical sensor heating housing according to claim 1, characterized in that: A heat preservation layer for reducing heat energy loss is provided between the outer shell layer and the carbon nanotube heating layer.
3. The electrochemical sensor heating housing according to claim 1 or 2, characterized in that: The positive and negative connectors of the carbon nanotube heating layer are both copper conductive rods, and each copper conductive rod is led to a corresponding heating electrode arranged at the bottom of the column shell through a copper wire, a silver wire or other conductive material.
4. The electrochemical sensor heating housing according to claim 3, characterized in that: The two copper conductive rods are isolated by the outer shell layer in an inclined angle or convex shape.
5. An electrochemical sensor heating housing, comprising a cylindrical housing for sleeved onto the outside of the electrochemical sensor, wherein holes are reserved at the bottom of the cylindrical housing for receiving electrode pins of the electrochemical sensor, characterized in that: It also includes a carbon nanotube heating layer for heating, and a supporting and protecting layer for supporting and protecting the carbon nanotube heating layer; The carbon nanotube heating layer is integrated on the inner side wall of the cylindrical shell, and positive and negative connectors for connecting to a power supply are provided at both ends of the carbon nanotube heating layer; The carbon nanotube heating layer is close to but not in contact with the positive and negative joints; The supporting protection layer is arranged around the inner side of the carbon nanotube heating layer.
6. The electrochemical sensor heating housing according to claim 5, characterized in that: A heat preservation layer is provided between the inner side wall of the column shell and the carbon nanotube heating layer, and the carbon nanotube heating layer is integrated inside the heat preservation layer.
7. The electrochemical sensor heating housing according to claim 5 or 6, characterized in that: The positive and negative connectors of the carbon nanotube heating layer are both copper conductive rods, and each copper conductive rod is led to a corresponding heating electrode arranged at the bottom of the column shell through a copper wire, a silver wire or other conductive material.
8. The electrochemical sensor heating housing according to claim 4, characterized in that: The two copper conductive rods are isolated by the cylindrical shell in an inclined angle or convex shape.
9. An electrochemical sensor, characterized in that: The electrochemical sensor heating housing comprises the electrochemical sensor heating housing according to any one of claims 1 to 4, the electrochemical sensor electrode layers and ion conductor electrolyte assembly arranged inside the cylindrical housing of the electrochemical sensor heating housing, and electrode pins arranged at the bottom of the cylindrical housing and connected to the electrochemical sensor electrode layers.
10. An electrochemical sensor, characterized in that: The invention comprises the electrochemical sensor heating shell according to any one of claims 5 to 8, and an electrochemical sensor body in which holes for electrode pins to pass through the cylindrical shell are arranged inside the electrochemical sensor heating shell.