A sealing temperature measuring device for pressure cooker energy efficiency test

Abstract

The application discloses a sealing temperature measuring device for pressure cooker energy efficiency test, which comprises a lifting assembly and a temperature measuring assembly for sealingly connecting a pressure cooker exhaust valve hole, the temperature measuring assembly is fixed on the lifting assembly to realize the movement of the temperature measuring assembly; the temperature measuring assembly comprises a temperature measuring wire, a sealing sleeve for sealing the pressure cooker exhaust valve hole and a fixing clamp for fixing the sealing sleeve, the sealing sleeve is coaxially sleeved on the temperature measuring wire, the fixing clamp is detachably sleeved on the sealing sleeve, and the fixing clamp is connected with the lifting assembly; the special clamp of the temperature measuring wire connector is developed, the temperature measuring part is passed into the pressure cooker through the pressure cooker exhaust valve hole, the temperature measuring wire connector can be quickly installed into the exhaust valve hole, the normal work of the pressure cooker is not affected, and the pressure leakage does not occur.

Description

Technical Field

[0001] This invention relates to a sealed temperature measuring device for testing the energy efficiency of pressure cookers. Background Technology

[0002] On July 23, 2020, the State Administration for Market Regulation and the Standardization Administration of China released the latest version of the mandatory national standard "Energy Efficiency Limits and Energy Efficiency Grades for Electric Pressure Cookers" (GB 39177-2020), which was to be officially implemented on August 1, 2021. The standard clearly specifies the energy efficiency grades, energy efficiency limits, and test methods for electric pressure cookers. According to the standard, it is necessary to measure the internal temperature of the pressure cooker. Because a pressure cooker needs to be completely sealed and operate until the water boils to generate pressure and achieve the desired pressure cooking effect, measuring the temperature under pressure is very difficult. In practice, the following three methods are commonly used for measurement:

[0003] Method 1: After making a hole in the pot lid, insert the temperature measuring component into it and then seal the hole. However, the sealing effect is difficult to guarantee without affecting the original working state of the product and maintaining consistent pressure. This also increases the difficulty of operating various connecting parts and adds channels for energy loss, thus affecting test results.

[0004] The energy efficiency test results for Method 1 are as follows, for the same sample:

[0005] Arithmetic mean t Initial water temperature t1 Water volume before test (kg) Enthalpy Hŧ corresponding to the arithmetic mean of cooking temperature over 30 minutes Initial water temperature Ht1 before the experiment Energy consumption (W•h) (Heating element) Thermal efficiency η 109 22.1 1.5 504.01044 92.7 298.3 57.45%

[0006] The thermal efficiency result was only 57.45%, which is low and below the standard limit of 60%.

[0007] Method 2: Use a soft thermocouple wire to pass through the edge of the pressure cooker's sealing ring and into the pot to measure the water temperature. However, this method affects the sealing effect and causes some energy to be lost, which will significantly affect the measurement results.

[0008] The energy efficiency test results for Method 2 are as follows, for the same sample:

[0009] Temperature arithmetic mean t Initial water temperature t1 Water volume before test (kg) Enthalpy Hŧ corresponding to the arithmetic mean of cooking temperature over 30 minutes Initial water temperature Ht1 before the experiment Energy consumption (W•h) (Heating element) Thermal efficiency η 108.39 22.2 1.5 501.034068 93.1 458.14 37.10%

[0010] The thermal efficiency result was only 37.10%, showing a significant deviation from the expected outcome.

[0011] Method 3: Using wireless temperature measurement devices is problematic because it's difficult to guarantee effective wireless signal communication through metal containers, and the cost is very high. Furthermore, when the wireless temperature measurement device is placed inside the pot, it absorbs some energy within the pot, and releases energy during operation, thus affecting the test results. Therefore, this method is too expensive, with a purchase price exceeding 200,000 yuan, and no related testing equipment was included, nor were any comparative experiments conducted. Summary of the Invention

[0012] This invention addresses, to some extent, the problems existing in the prior art. To this end, this invention proposes a sealed temperature measuring device for pressure cooker energy efficiency testing. This device is non-destructive to the sample, and the only component that enters the sample is the temperature measuring wire, with no other additional components. It is low in cost and can be quickly connected to complete the test, thus overcoming the shortcomings of the prior art.

[0013] The above objective is achieved through the following technical solution:

[0014] A sealed temperature measuring device for pressure cooker energy efficiency testing includes a lifting assembly and a temperature measuring assembly for sealing the pressure cooker exhaust valve port. The temperature measuring assembly is fixed to the lifting assembly to enable movement of the temperature measuring assembly. The temperature measuring assembly includes a temperature acquisition device, a temperature measuring wire, a sealing sleeve for sealing the pressure cooker exhaust valve port, and a fixing clamp for fixing the sealing sleeve. The temperature acquisition device is electrically connected to the temperature measuring wire. The sealing sleeve is coaxially sleeved on the temperature measuring wire. The fixing clamp is detachably sleeved on the sealing sleeve and is connected to the lifting assembly.

[0015] In some embodiments, the fixing clamp includes a clamp, a cylindrical support, and a mounting body for mounting the clamp on the cylindrical support. The temperature measuring wire passes through the clamp, the cylindrical support, and the mounting body respectively. The mounting body passes through the cylindrical support and is threaded to the end of the clamp. The clamp and the mounting body are clamped on the cylindrical support.

[0016] In some embodiments, the chuck is conical, with an internal thread at the end of the chuck and an external thread on a portion of the outer wall of the mounting body. The sealing sleeve is detachably clamped inside the chuck and extends out from the head end of the chuck.

[0017] In some embodiments, the cylindrical support is adapted to be clamped onto the lifting assembly.

[0018] In some embodiments, the clamp, the cylindrical support, and the mounting body are all hollow structures.

[0019] In some embodiments, anti-slip textures are provided on the outer wall of the chuck.

[0020] In some embodiments, the sealing sleeve is a conical sealing silicone head.

[0021] In some embodiments, the lifting assembly includes a bracket, a column, and a telescopic rod. The telescopic rod is horizontally mounted on the column and can move up and down along the column. One end of the bracket is mounted on the end of the telescopic rod, and the cylindrical bracket is fixed to the other end of the bracket.

[0022] In some embodiments, the support is provided with a manual fine-tuning bracket for fine-tuning the vertical position of the cylindrical support.

[0023] In some embodiments, the temperature measuring wire is a thermocouple, and the diameter of the temperature measuring wire is 1 mm.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] (1) The present invention develops a special clamp for the temperature measuring wire connector. The temperature measuring component is inserted into the pressure cooker through the pressure cooker exhaust valve hole, ensuring that the temperature measuring wire connector can be quickly installed into the exhaust valve hole without affecting the normal operation of the pressure cooker and without causing pressure leakage.

[0026] (2) This invention can be used in conjunction with fully automated testing equipment for electric pressure cookers to build a comprehensive testing laboratory for electric pressure cookers, which is expected to provide energy efficiency testing services for approximately 300 home appliance companies nationwide.

[0027] (3) This invention promotes the implementation of the national standard GB / T 39177-2020, establishes a complete set of testing equipment development and analysis technology for electric pressure cooker energy efficiency testing projects, and creates conditions for the sustainable development of the testing industry.

[0028] (4) The present invention can simplify the detection process, reduce costs, save a lot of time and costs for small and medium-sized enterprises, improve the work efficiency of small and medium-sized enterprises, and help enhance the competitiveness of enterprises.

[0029] (5) The implementation and application of the results of this invention will help improve the industry level, provide solid support for enterprise technical services, and give unlimited opportunities to create commercial value, thus playing a demonstrative role in the industry. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention.

[0031] Figure 2 This is an exploded structural diagram of the fixing fixture of the present invention.

[0032] The markings in the diagram are: 1. Temperature measuring wire; 2. Sealing sleeve; 3. Fixing clamp; 4. Bracket; 5. Column; 6. Telescopic rod; 7. Pressure cooker; 30. Clamp; 31. Cylindrical bracket; 32. Mounting body; 40. Manual fine-tuning bracket. Detailed Implementation

[0033] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0034] like Figure 1 As shown, a sealed temperature measuring device for pressure cooker energy efficiency testing includes a lifting assembly and a temperature measuring assembly for sealing the exhaust valve hole of the pressure cooker 7. The temperature measuring assembly is fixed to the lifting assembly to enable its movement. The temperature measuring assembly is connected to the system's computer host, and the values ​​measured by the temperature measuring assembly are transmitted to the system's computer host, as should be understood by those skilled in the art.

[0035] The temperature measuring assembly includes a temperature acquisition unit (not shown in the figure), a temperature measuring wire 1, a sealing sleeve 2 for sealing the exhaust valve hole of the pressure cooker 7, and a fixing clamp 3 for fixing the sealing sleeve 2. The temperature acquisition unit is electrically connected to the temperature measuring wire 1 and to the system's computer host. The sealing sleeve 2 is tightly and coaxially fitted onto the temperature measuring wire 1. The fixing clamp 3 is detachably fitted onto the sealing sleeve 2, allowing the sealing sleeve 2 to be securely fastened to a designated position on the temperature measuring wire 1. The fixing clamp 3 is also connected to the lifting assembly. Adjustment of the lifting assembly allows the entire temperature measuring assembly to move, enabling continuous testing by the experimenter. Furthermore, the outer diameter of the sealing sleeve 2 is interference-fitted with the exhaust valve hole of the pressure cooker, effectively blocking the exhaust valve hole and preventing air leakage. The temperature measuring wire 1 extends into the inner pot of the pressure cooker 7, and is required to be immersed in the water surface within a range of 10mm to 30mm. The temperature measuring point of the temperature measuring wire 1 is fixed at the center of the inner pot of the pressure cooker 7 to ensure the validity and authenticity of the measurement results and reduce the error of the measurement values.

[0036] Furthermore, such as Figure 1-2As shown, the fixing clamp 3 includes a clamp 30, a cylindrical support 31, and a mounting body 32 that mounts the clamp 30 onto the cylindrical support 31. The temperature measuring wire 1 passes through the clamp 30, the cylindrical support 31, and the mounting body 32 before extending into the pressure cooker. The mounting body 32 passes through the cylindrical support 31 and is threadedly connected to the end of the clamp 30, allowing the clamp 30 and the mounting body 32 to be clamped onto the cylindrical support 31. The cylindrical support 31 is adapted to be clamped onto the lifting assembly. Furthermore, the clamp 30 is conical in shape, with an internal thread at its end and an external thread on a portion of the outer wall of the mounting body 32. The sealing sleeve 2 is detachably clamped inside the clamp 30 and extends beyond the head end of the clamp 30; the extended portion is used to seal the exhaust valve hole of the pressure cooker.

[0037] Furthermore, the clamp 30, the cylindrical bracket 31, and the mounting body 32 are all hollow structures, which facilitates the smooth passage of the temperature measuring wire 1.

[0038] Furthermore, anti-slip textures are provided on the outer wall of the chuck 30 to facilitate unscrewing the chuck 30 from the mounting body 32, thereby allowing the sealing sleeve 2 to be replaced.

[0039] Furthermore, the sealing sleeve 2 is a conical sealing silicone head; in other words, one end of the sealing sleeve 2 is large, the other end is small, and the middle is gradually transitioned, thereby adapting to the installation of the clamp 30.

[0040] Furthermore, such as Figure 1 As shown, the lifting assembly includes a bracket 4, a column 5, and a telescopic rod 6. The telescopic rod 6 is horizontally mounted on the column 5 and can move up and down along the column 5. The telescopic rod 6 can also be rotatably mounted on the column 5 to adjust its direction and longitudinal position. Because samples need to be constantly replaced when testing the pressure cooker, the lifting assembly can adjust the position of the temperature measuring component, facilitating sample replacement by the tester. One end of the bracket 4 is installed at the end of the telescopic rod 6, and the cylindrical bracket 31 is fixed to the other end of the bracket 4. In this way, the temperature measuring wire 1 can move with the telescopic rod 6, facilitating operation by the tester.

[0041] In this embodiment, a manual fine-tuning bracket 40 is provided on the bracket 4 for fine-tuning the vertical position of the cylindrical bracket 31. By fine-tuning the height of the bracket 4, the temperature measuring component can be perfectly positioned to enter the pressure cooker through the pressure cooker's exhaust valve hole for accurate temperature measurement, achieving effective sealing and preventing pressure leakage. This device has undergone repeated testing and has been verified through specialized pressure tests, demonstrating excellent sealing performance and effectively ensuring the accuracy of test results. The manual fine-tuning bracket 40 is a nut and rack mechanism, which is existing technology and will not be described in detail here.

[0042] In this embodiment, the temperature measuring wire 1 is a Kayet thermocouple, and the diameter of the temperature measuring wire 1 is 1 mm.

[0043] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A sealed temperature measuring device for pressure cooker energy efficiency test, characterized in that, The application relates to a temperature measuring assembly for sealingly connecting a pressure cooker exhaust valve hole, which is fixed on a lifting assembly to realize movement of the temperature measuring assembly; the temperature measuring assembly comprises a temperature collector, a temperature measuring wire (1), a sealing sleeve (2) for sealing the pressure cooker exhaust valve hole and a fixing clamp (3) for fixing the sealing sleeve (2); the temperature collector is electrically connected with the temperature measuring wire (1); the sealing sleeve (2) is coaxially sleeved on the temperature measuring wire (1); and the fixing clamp (3) is detachably sleeved on the sealing sleeve (2) and connected with the lifting assembly. The fixing clamp (3) comprises a chuck (30), a cylindrical support (31) and a mounting body (32) for mounting the chuck (30) on the cylindrical support (31); the temperature measuring wire (1) penetrates through the chuck (30), the cylindrical support (31) and the mounting body (32) respectively; the mounting body (32) is threadedly connected with the end of the chuck (30) after penetrating through the cylindrical support (31); and the chuck (30) and the mounting body (32) are clamped on the cylindrical support (31). The chuck (30) is in the shape of a cone, the end of the chuck (30) is provided with internal threads, the outer wall of the mounting body (32) is provided with external threads, and the sealing sleeve (2) is detachably clamped in the chuck (30) and extends from the head end of the chuck (30). The lifting assembly comprises a support (4), a stand column (5) and an extension rod (6); the extension rod (6) is transversely mounted on the stand column (5) and can move up and down along the stand column (5); one end of the support (4) is mounted on the end of the extension rod (6); and the cylindrical support (31) is fixed on the other end of the support (4).

2. The sealing temperature measuring device for pressure cooker energy efficiency test according to claim 1, characterized in that, The cylindrical support (31) is adapted to be clamped on the lifting assembly.

3. The sealing temperature measuring device for pressure cooker energy efficiency test according to claim 1, characterized in that, The chuck (30), the cylindrical support (31) and the mounting body (32) are all hollow structures.

4. The sealing temperature measuring device for energy efficiency test of pressure cooker according to claim 1, characterized in that, Anti-skid lines are arranged on the outer wall of the chuck (30).

5. The sealing temperature measuring device for energy efficiency test of pressure cooker according to claim 1, characterized in that, The sealing sleeve (2) is a conical sealing silica gel head.

6. The sealing temperature measuring device for energy efficiency test of pressure cooker according to claim 1, characterized in that, A manual fine adjustment support (40) for fine adjustment of the up-and-down position of the cylindrical support (31) is arranged on the support (4).

7. The sealing temperature measuring device for energy efficiency test of pressure cooker according to claim 1, characterized in that, The temperature measuring wire (1) is a thermocouple, and the diameter of the temperature measuring wire (1) is 1 mm.

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