A hydrogel fever-reducing patch test heat testing device

Abstract

The present application relates to the technical field of hydrogel fever-reducing patch test detection, and relates to a heat testing device for hydrogel fever-reducing patch test detection, which comprises a silica gel simulation pad and a serpentine flow guide pipeline composed of an internal flow channel, an external threaded connecting pipe and an external communication temperature control pipe. The two ends of the serpentine flow guide pipeline are connected to an external circulating pump through a circulating flow guide pipe to form a circulating loop, a circulating constant-temperature liquid is used to simulate the body temperature of a human body, and a built-in temperature sensor and a heating assembly are used to realize precise temperature control in multiple working conditions.

Description

Technical Field

[0001] This invention relates to the field of hydrogel fever-reducing patch testing technology, and in particular to a heat testing device for hydrogel fever-reducing patches. Background Technology

[0002] Hydrogel fever-reducing patches are external application cooling products made by uniformly coating a non-woven fabric substrate with a hydrophilic polymer hydrogel as the matrix. They utilize the principle of continuous evaporation and heat absorption of the large amount of water bound in the hydrogel under the influence of body temperature to achieve a physical cooling effect on the local skin. Hydrogel fever-reducing patches are characterized by stable cooling, ease of use, absence of drug ingredients, and low skin irritation. They are widely used in scenarios such as physical cooling of children's fever, auxiliary cooling of adults' fever, and cold compresses for sports injuries. The cooling performance of hydrogel fever-reducing patches directly determines their clinical efficacy. Currently, the industry mainly relies on the following method to test the cooling performance: attaching the fever-reducing patch to a constant temperature heating platform or simulated skin surface, using single-point or multi-point thermocouple contact temperature measurement, and recording the temperature change curve at regular intervals to evaluate the cooling amplitude and duration of the fever-reducing patch. However, existing testing methods have the following shortcomings: insufficient measurement range – current testing devices can typically only test the cooling performance of fever-reducing patches under single ambient temperature and single simulated body temperature conditions, failing to cover the cooling performance under multiple conditions such as physical cooling in low-temperature environments, assisted cooling in high-temperature environments, sweating conditions, and temperature differences at different application sites; limited detection values ​​– due to the limitations of the testing device structure, data can usually only be collected from a limited number of temperature measurement points in the center or corners of the fever-reducing patch, failing to obtain information on the temperature distribution field of the entire application surface, making it difficult to comprehensively evaluate the effective cooling area and cooling uniformity of the fever-reducing patch; limited realism in the simulation of the testing process – existing testing methods are mostly static constant temperature heating modes, failing to consider the temperature regulation states of blood vessels at different depths in human skin, as well as the dynamic negative feedback process after temperature changes under different states, and lacking effective simulation of actual usage factors, resulting in a significant deviation between test data and actual clinical performance. Therefore, how to develop a fever-reducing patch performance testing device with a wide testing range, comprehensive detection data, high degree of automation, and the ability to realistically simulate the dynamic cooling process of human skin is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0003] The technical problem this invention aims to solve is that existing hydrogel fever-reducing patch cooling performance testing devices have insufficient measurement range, only able to test under single ambient temperature and single simulated body temperature conditions, and cannot cover cooling performance under multiple working conditions; the detection values ​​are limited, and it is impossible to obtain temperature distribution field information of the fever-reducing patch application surface; the simulation of the testing process has limited realism, and it does not consider the temperature differences at different depths of human skin and the dynamic negative feedback process, resulting in a large deviation between the test data and actual clinical performance.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a heat testing device for testing hydrogel fever-reducing patches, including a silicone simulation pad for simulating real human skin. The silicone simulation pad has several horizontally staggered internal flow channels. Both ends of the silicone simulation pad are fixedly equipped with external threaded connecting pipes with built-in temperature sensors at the opening positions of the internal flow channels. An external connecting temperature control pipe is threaded onto the external threaded connecting pipe. The internal flow channels, the external threaded connecting pipe and the external connecting temperature control pipe together form a serpentine guide pipe on the silicone simulation pad. Both ends of the serpentine guide pipe are connected to an external circulation pump through a circulation guide pipe.

[0005] Furthermore, the external connecting temperature control tube includes a flexible connecting tube, internally threaded sleeves axially assembled at both ends of the flexible connecting tube, and a metal heating bend fixedly mounted on the outside of the flexible connecting tube. The metal heating bend heats the fluid inside the flexible connecting tube through a built-in electric heating wire.

[0006] Furthermore, the internal flow channels are arranged in a staggered manner near the test surface of the silicone simulation pad to simulate the cooling effect at different depths.

[0007] Furthermore, a connecting storage tank is connected between the inlet of the external circulation pump and the connecting end of the circulation guide pipe.

[0008] Furthermore, a removable filter screen is installed inside the liquid storage tank.

[0009] Furthermore, a display screen for displaying the internal temperature is fixedly mounted on the outside of the external threaded connecting pipe at the silicone simulation pad connection end via a lateral bracket.

[0010] Furthermore, the internal threaded assembly sleeve includes connecting terminals axially fixed at both ends of the flexible connecting pipe and an internal threaded sealing sleeve fitted onto the connecting terminals.

[0011] Furthermore, lateral support brackets are installed on the outside of both the external threaded connecting pipe and the metal heating bend.

[0012] Furthermore, the temperature sensor control terminal is electrically connected to the display screen and the signal receiving terminal of the metal heating bend via a signal control line on the outside of the side bracket.

[0013] Furthermore, control switches for controlling the display screen and the metal heating bend are installed on the outer side of the lateral support.

[0014] The beneficial effects of this invention are: (1) The present invention uses a serpentine flow channel inside the silicone simulation pad to simulate the temperature gradient of different depths of real skin by using circulating constant temperature liquid to flow through internal channels of different depths and staggered arrangement, making the test conditions closer to clinical reality and solving the technical problem of limited realism of existing static constant temperature heating stage tests.

[0015] (2) The present invention monitors the liquid temperature in each flow channel in real time by using a built-in temperature sensor, and uses a metal heating bend and a built-in electric heating wire to accurately heat and compensate the circulating liquid. It can simulate complex test scenarios such as different ambient temperatures, different body temperature conditions and sweating conditions on the same device, which significantly expands the test range.

[0016] (3) By setting temperature sensors at multiple flow channel positions inside the silicone simulation pad, the present invention can simultaneously acquire temperature data at multiple positions on the surface of the fever-reducing patch, providing data support for evaluating the effective cooling area and cooling uniformity of the fever-reducing patch, and overcoming the shortcomings of limited traditional single-point temperature measurement data. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the externally connected temperature control tube in this invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the externally connected temperature control tube in this invention.

[0021] Figure 4 This is a structural diagram of the connected liquid storage tank in the disassembled state in this invention.

[0022] Figure 5 This is a schematic diagram of the layout of the internal flow channels in this invention.

[0023] Figure 6 This is a structural schematic diagram of the assembly equipment of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 100. Silicone simulation pad; 110. Internal flow channel; 120. External threaded connecting pipe; 130. Temperature sensor; 200. External connecting temperature control pipe; 210. Flexible connecting pipe; 220. Internal threaded fitting sleeve; 221. Connecting terminal; 222. Internal threaded sealing sleeve; 230. Metal heating bend; 231. Built-in electric heating wire; 310. Circulation guide pipe; 320. External circulation pump; 400. Connecting liquid storage tank; 410. Removable filter screen; 500. Lateral support; 510. Display screen; 520. Signal control line; 530. Control switch; 600. Lateral elevation support. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The device shown is a heat testing apparatus for hydrogel fever-reducing patches, comprising a silicone simulation pad 100. The silicone simulation pad 100 is made of biomimetic silicone material, and its surface feel and thermal conductivity are close to those of real skin. The silicone simulation pad 100 has several horizontally staggered internal flow channels 110 arranged in a staggered depth configuration near the test surface. This staggered arrangement of the internal flow channels 110 simulates the temperature conduction of blood vessels at different depths, making the cooling test of the fever-reducing patch more realistic and reliable. Externally threaded connecting tubes 120 are fixedly mounted at both ends of the silicone simulation pad 100 at the openings of the internal flow channels 110. Temperature sensors 130 are installed inside the externally threaded connecting tubes 120, and the temperature sensors 130 are used to monitor the temperature of the circulating liquid flowing through the internal flow channels 110 in real time.

[0028] An externally threaded connecting pipe 120 is threadedly fitted with an externally connected temperature control pipe 200. The externally connected temperature control pipe 200 includes a flexible connecting pipe 210, internally threaded fitting sleeves 220 axially mounted at both ends of the flexible connecting pipe 210, and a metal heating bend 230 fixedly fitted on the outside of the flexible connecting pipe 210. The internally threaded fitting sleeve 220 includes connecting terminals 221 axially fixed at both ends of the flexible connecting pipe 210 and internally threaded sealing sleeves 222 fitted on the connecting terminals 221. Sealing and communication are achieved through the threaded engagement of the internally threaded sealing sleeves 222 and the externally threaded connecting pipe 120. The metal heating bend 230 has a built-in electric heating wire 231 inside for heating compensation of the circulating liquid flowing inside the flexible connecting pipe 210.

[0029] An internal flow channel 110, an external threaded connecting pipe 120, and an external connecting temperature control pipe 200 together form a serpentine flow guide pipe on the silicone simulation pad 100. The serpentine flow guide pipe, arranged in a meandering pattern, runs within the silicone simulation pad 100. Both ends of the serpentine flow guide pipe are connected to an external circulation pump 320 via circulation guide pipes 310. A connecting liquid storage tank 400 is also connected between the connecting end of the circulation guide pipe 310 and the inlet of the external circulation pump 320. The connecting liquid storage tank 400 contains a removable filter screen 410 for filtering impurities in the circulating liquid. The external circulation pump 320 drives the circulating liquid to circulate between the serpentine flow guide pipe and the circulation guide pipe 310.

[0030] A display screen 510 is fixedly mounted on the outside of the threaded connecting pipe 120 at the connection end of the silicone simulation pad 100 via a lateral bracket 500. The display screen 510 displays the real-time detected temperature of the temperature sensors 130 in each flow channel. Lateral support brackets 600 are installed on the outside of both the threaded connecting pipe 120 and the metal heating bend 230 to support and fix the entire device. The control terminal of the temperature sensor 130 is electrically connected to the signal receiving terminals of the display screen 510 and the metal heating bend 230 via a signal control line 520 on the outside of the lateral bracket 500. A control switch 530 is installed on the outer surface of the lateral bracket 500 to control the operating status of the display screen 510 and the metal heating bend 230.

[0031] During testing, the experimenter first affixed the hydrogel fever-reducing patch to be tested onto the test surface of the silicone simulation pad 100. The external circulation pump 320 was then activated, introducing the circulating fluid used to simulate blood, stored inside the connected storage tank 400, into the corresponding external connected temperature control tube 200 through the lower right inlet. The circulating fluid then entered the serpentine guide tube via the external connected temperature control tube 200, circulating within the serpentine guide tube to simulate the blood flow state within human blood vessels.

[0032] The serpentine flow channel is formed by the internal flow channel 110 meandering through the silicone simulation pad 100. External connecting temperature control pipes 200 are installed at the inlet and outlet ends on both sides. Each external connecting temperature control pipe 200 is equipped with a temperature sensor 130. By monitoring the temperature of the circulating fluid at the inlet and outlet ends of the serpentine flow channel, the temperature difference after the fluid flows through the test surface of the silicone simulation pad 100 is calculated, thereby accurately measuring the cooling effect of the heat-reducing patch within that segment and achieving segmented temperature monitoring.

[0033] Before the circulating fluid enters the serpentine flow channel, the temperature of the circulating fluid can be regulated by the built-in electric heating wire 231 inside the metal heating bend 230. By adjusting the heating power of the metal heating bend 230 inside the external connecting temperature control pipe 200 at different feed ends, different temperature states of different parts of the human body can be simulated in different flow sections of the serpentine flow channel, realizing multi-temperature zone simulation. At the same time, when the circulating fluid flows back after being cooled by the heat-reducing patch application area, the temperature of the cooled fluid can be adjusted by the metal heating bend 230 inside the downstream external connecting temperature control pipe 200, so that it returns to the set temperature and circulates again, thereby simulating the cooling effect of the human body under continuous constant temperature, making the simulation test more realistic.

[0034] Throughout the entire test, the inlet and outlet ends of each internal flow channel 110 were monitored in real time by temperature sensors 130. The detection data was transmitted to the display screen 510 via signal control line 520 for real-time display, allowing experimenters to intuitively grasp the temperature change curves of each flow channel section. In addition, the external circulation pump 320 was set as an adjustable-speed circulation pump, which simulated the blood flow characteristics of the human body under different blood pressure states by adjusting the flow rate of the circulating fluid, further improving the realism of the simulation of the human physiological environment by the testing device.

[0035] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A heat testing device for hydrogel fever-reducing patches, comprising a silicone simulation pad (100) for mimicking human skin, characterized in that: The silicone simulation pad (100) has several horizontally staggered internal flow channels (110). The silicone simulation pad (100) has external threaded connecting pipes (120) with built-in temperature sensors (130) fixedly installed at both ends of the internal flow channel (110). An external connecting temperature control pipe (200) is threaded onto the external threaded connecting pipe (120). The internal flow channels (110), external threaded connecting pipes (120) and external connecting temperature control pipes (200) together form a serpentine flow guide pipe on the silicone simulation pad (100). The two ends of the serpentine flow guide pipe are connected to an external circulation pump (320) through a circulation guide pipe (310).

2. The heat testing device for hydrogel fever-reducing patches according to claim 1, characterized in that: The external connecting temperature control tube (200) includes a flexible connecting tube (210), an internally threaded sleeve (220) axially assembled at both ends of the flexible connecting tube (210), and a metal heating bend (230) fixedly fitted on the outside of the flexible connecting tube (210). The metal heating bend (230) heats the fluid inside the flexible connecting tube (210) through a built-in electric heating wire (231).

3. The heat testing device for hydrogel fever-reducing patches according to claim 1, characterized in that: The internal flow channels (110) are arranged in a staggered manner near the test surface of the silicone simulation pad (100) to simulate the cooling effect at different depths.

4. The heat testing device for hydrogel fever-reducing patches according to claim 1, characterized in that: A connecting storage tank (400) is connected between the inlet of the external circulation pump (320) and the connecting end of the circulation guide pipe (310).

5. The heat testing device for hydrogel fever-reducing patches according to claim 4, characterized in that: The connected liquid storage tank (400) is equipped with a removable filter screen (410).

6. The heat testing device for hydrogel fever-reducing patches according to claim 1, characterized in that: The external threaded connecting pipe (120) is fixedly mounted with a display screen (510) for displaying the internal temperature on the outside of the silicone simulation pad (100) by a lateral bracket (500).

7. The heat testing device for hydrogel fever-reducing patches according to claim 2, characterized in that: The internal threaded fitting sleeve (220) includes connecting terminals (221) axially fixed at both ends of the flexible connecting pipe (210) and an internal threaded sealing sleeve (222) fitted on the connecting terminals (221).

8. The heat testing device for hydrogel fever-reducing patches according to claim 1, characterized in that: Lateral elevation brackets (600) are installed on the outside of both the external threaded connecting pipe (120) and the metal heating bend (230).

9. The heat testing device for hydrogel fever-reducing patches according to claim 1, characterized in that: The temperature sensor (130) control terminal is electrically connected to the display screen (510) and the signal receiving terminal of the metal heating bend (230) via the signal control line (520) on the outside of the side bracket (500).

10. The heat testing device for hydrogel fever-reducing patches according to claim 6, characterized in that: The outer side of the lateral bracket (500) is equipped with a control switch (530) for controlling the display screen (510) and the metal heating bend (230).

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