CN219607400U - Electric heating calibration device - Google Patents
Electric heating calibration device Download PDFInfo
- Publication number
- CN219607400U CN219607400U CN202320236622.9U CN202320236622U CN219607400U CN 219607400 U CN219607400 U CN 219607400U CN 202320236622 U CN202320236622 U CN 202320236622U CN 219607400 U CN219607400 U CN 219607400U
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- metal cylinder
- electric heater
- electric
- calibration device
- power
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- 238000005485 electric heating Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 49
- 238000009413 insulation Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000008236 heating water Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 229920000742 Cotton Polymers 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 21
- 238000004321 preservation Methods 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000003079 width control Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model relates to an electric heating calibration device, which comprises a metal cylinder and an electric heating component; wherein, the outer surface of the metal cylinder body is provided with a heat preservation structure; the electric heating assembly comprises an electric heater, a three-phase power line and a power regulator, wherein the electric heater is arranged in the metal cylinder and is used for heating water contained in the metal cylinder, the three-phase power line is connected with the electric heater, the power regulator is connected with the electric heater in series through the three-phase power line, and the power regulator regulates the input power of the electric heater in a mode of changing the voltage at two ends of the electric heater. The power of the electric heating calibration device can be adjusted, so that the tested machines with different heating capacities can be simulated, the three-phase power supply is adopted to supply power, large current required by an experiment can be covered, the heat insulation structure is arranged outside the metal cylinder of the calibration device, the heat insulation performance is improved, heat leakage and heat accumulation during the test are accurately calibrated, and the measurement accuracy of the calibration test is improved.
Description
Technical Field
The utility model relates to the technical field of heat pump water heater testing, in particular to an electric heating calibration device.
Background
According to the GB/T21362-2008 standard, equipment for measuring the circulating heat pump water heater is to utilize an electric heating calibration device to calibrate heat leakage and heat accumulation of test equipment. The test device should periodically perform calibration tests to verify the measurement accuracy of the test device. The calibration test should be performed at least once every half year after a significant change in the test apparatus. The device for testing the circulating heating type heat pump water heater specified by the standard is shown in fig. 1, wherein 1 'is a tested machine, 2' is a water pump, 3 'is a standard water tank, and 4' is a thermometer. In order to check the heat leakage of the testing device, an electric heating calibration device is used for replacing a tested machine to be connected into a pipeline for testing in actual testing, and the electric heating calibration device is connected with a standard water tank and a water pump through the pipeline.
For the electric heating calibration device, the standard does not give specific physical reference, and a laboratory generally purchases an electric heater for calibration according to the understanding of the laboratory. However, the use has the following problems: (1) The power of the electric heating calibration device cannot match the requirements of a laboratory, and the power is too large or too small; (2) The current of the electric heating calibration device exceeds the bearing range of a laboratory, so that the optimal calibration effect cannot be achieved; (3) The material heat preservation performance of the electric heating calibration device is poor, and the actual operation process of the sample machine cannot be completely simulated.
Disclosure of Invention
Accordingly, the present utility model is directed to an electric heating calibration device, which aims to solve the problems in the prior art.
According to the utility model, there is provided an electrical heating calibration device comprising a metal cylinder and an electrical heating assembly; wherein,,
the outer surface of the metal cylinder body is provided with a heat insulation structure;
the electric heating assembly comprises an electric heater, a three-phase power line and a power regulator, wherein the electric heater is arranged in the metal cylinder and is used for heating water contained in the metal cylinder, the three-phase power line is connected with the electric heater, the power regulator is connected with the electric heater in series through the three-phase power line, and the power regulator regulates the input power of the electric heater in a mode of changing the voltage at two ends of the electric heater.
Preferably, the heat insulation structure is heat insulation cotton arranged on the outer surface of the metal cylinder.
Preferably, the heat insulation structure comprises a heat insulation cylinder body arranged outside the metal cylinder body, a vacuum cavity is arranged between the heat insulation cylinder body and the metal cylinder body, and heat insulation cotton is arranged on the outer surface of the heat insulation cylinder body.
Preferably, the electric heater further comprises an on-off device, and the on-off device is connected with the electric heater in series through a three-phase power line.
Preferably, the on-off device is an air switch.
Preferably, the electric heaters are provided with a plurality of groups, and the on-off device adjusts the input power of the plurality of groups of electric heaters in a manner of controlling whether each group of electric heaters is connected for heating.
Preferably, the electric heater further comprises a control module, wherein the on-off device is a relay, the control module is connected with the on-off device and the power regulator, and the control module is used for sending an adjusting instruction to the on-off device and the power regulator so as to adjust the input power of the electric heater.
Preferably, the metal cylinder is provided with a water inlet, a water outlet, a drain valve and an exhaust valve, and the bottom of the cylinder is provided with two supporting legs.
Preferably, the metal cylinder is made of stainless steel materials.
Preferably, the metal cylinder is connected with a grounding wire.
The power of the electric heating calibration device provided by the utility model can be adjusted, so that the tested machine with different heating capacities can be simulated; the three-phase power line is connected with the electric heater, and a 380V three-phase alternating current power supply is adopted for supplying power, so that large current required by experiments can be covered; the heat insulation material is arranged outside the metal cylinder of the calibration device, so that the heat insulation performance of the calibration device is improved, heat leakage and heat accumulation during the calibration test are accurately calibrated, and the measurement accuracy of the calibration test is improved.
Drawings
The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a test device for use in a cycle heating type heat pump water heater specified in the GB/T21362-2008 standard.
Fig. 2 shows a schematic structural diagram of an electric heating calibration device according to an embodiment of the present utility model.
Fig. 3 shows another schematic structural view of an electric heating calibration device according to an embodiment of the present utility model.
In the figure: 1. a metal cylinder; 11. a water inlet; 12. a water outlet; 13. a drain valve; 14. an exhaust valve; 2. thermal insulation cotton; 3. an electric heater; 4. a power regulator; 5. an on-off device; 6. support legs; 7. a heat-insulating cylinder; 8. and (5) vacuumizing the valve.
Detailed Description
Various embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. For clarity, the various features of the drawings are not drawn to scale.
The utility model provides an electric heating calibration device, as shown in figure 2, which comprises a metal cylinder 1 and an electric heating component; wherein, the outer surface of the metal cylinder body 1 is provided with a heat insulation structure; the electric heating assembly comprises an electric heater 3, a three-phase power line and a power regulator 4, wherein the electric heater 3 is arranged in the metal cylinder 1 and is used for heating water contained in the metal cylinder 1, the three-phase power line is connected with the electric heater 3, the power regulator 4 is connected with the electric heater 3 in series through the three-phase power line, and the power regulator 4 regulates the input power of the electric heater 3 in a mode of changing the voltage at two ends of the electric heater 3.
Specifically, the metal cylinder 1 may be made of stainless steel materials, so that it has good corrosion resistance. The metal cylinder 1 is provided with a water inlet 11, a water outlet 12, a drain valve 13 and an exhaust valve 14, wherein the water inlet 11 and the water outlet 12 are used for being respectively connected with a water pump and a standard water tank when a test is carried out, the exhaust valve 14 is used for exhausting internal air when water is injected, so that water can be filled in the metal cylinder 1, and the drain valve 13 is used for exhausting water in the metal cylinder 1 after the test is finished. The bottom of barrel is provided with two supporting legs 6, supporting leg 6 is L type structure, and two supporting legs 6 symmetry set up in the bottom of metal barrel 1, can carry out stable support to metal barrel 1 to and conveniently fix this calibration device in suitable position. In this embodiment, the metal cylinder 1 is a cylindrical metal cylinder 1, and it is understood that the metal cylinder 1 may have other shapes. In this embodiment, the metal cylinder 1 is further connected with a ground wire, and the ground wire can be connected with the ground during testing, so as to prevent the metal cylinder 1 from being electrified to cause an electric shock accident due to internal insulation damage when the calibration device is used. In this embodiment, the electric heater 3 is a heating resistor.
Referring to fig. 2, the heat insulation structure may be heat insulation cotton 2 disposed on the outer surface of the metal cylinder 1, and when the heat insulation cotton 2 is implemented, the heat insulation cotton may be adhered to the outer surface of the metal cylinder 1 through an adhesive. The heat insulation structure can also be the structure shown in fig. 3, referring to fig. 3, the heat insulation structure comprises a heat insulation cylinder 7 arranged outside the metal cylinder 1, a vacuum cavity is arranged between the heat insulation cylinder 7 and the metal cylinder 1, and heat insulation cotton 2 is arranged on the outer surface of the heat insulation cylinder 7. In specific implementation, the heat-insulating cylinder 7 can also be made of stainless steel materials, the inner wall of the heat-insulating cylinder 7 and the outer wall of the metal cylinder 1 are arranged at intervals, a cavity structure is formed between the inner wall and the outer wall of the heat-insulating cylinder and the outer wall of the metal cylinder, the heat-insulating cylinder 7 is provided with a vacuumizing valve 8, the vacuumizing valve 8 is communicated with the cavity structure, and air of the cavity structure is pumped away by connecting a vacuumizing pump on the vacuumizing valve 8, so that a vacuum cavity is formed. The arrangement of the vacuum cavity breaks off the heat exchange and convection of the air medium, thereby better playing a role in heat preservation. The heat preservation cotton 2 that the outside of heat preservation barrel 7 set up has further increased the heat preservation effect.
Further, the electric heating calibration device further comprises an on-off device 5, and the on-off device 5 is connected with the electric heater 3 in series through a three-phase power line. As shown in fig. 2, the on-off device 5 and the power regulator 4 are sequentially connected in series on a three-phase power line, so as to realize the on-off of the electric heater 3 and the regulation of the input power of the electric heater 3. The on-off device 5 may be an air switch.
Referring to fig. 3, the electric heaters 3 are provided with a plurality of groups, and the on-off device 5 adjusts the input power of the plurality of groups of electric heaters 3 in a manner of controlling whether each group of electric heaters 3 in the plurality of groups of electric heaters 3 is connected for heating. The electric heating calibration device may further include a control module (not shown in the figure), where the on-off device 5 is a relay, the control module is connected to the on-off device 5 and the power regulator 4, and the control module is configured to send an adjustment instruction to the on-off device 5 and the power regulator 4 to adjust the input power of the electric heater 3.
In specific implementation, the power regulator 4 may be a silicon controlled rectifier output module and a pulse width modulation module, where the silicon controlled rectifier output module is connected in series with the electric heater 3, the output end of the pulse width modulation module is connected with the control electrode of the silicon controlled rectifier output module, and the input end of the pulse width control module is used to receive the adjustment instruction sent by the control module. The control electrode of the silicon controlled rectifier output module is cut off when no voltage is applied, and the electric heater 3 does not pass through 380V alternating current; the control electrode of the silicon controlled rectifier output module is conducted when being electrified, and the electric heater 3 passes through 380V alternating current. When the duty ratio (or output ratio) of the output of the pulse width control module is 1, the full power (namely rated power) of the electric heater is input, and when the duty ratio is smaller than 1, the full power of the electric heater is input in a percentage of the full power of the corresponding electric heater. When the power regulator is applied, the control module calculates a rough value (namely an adjusting instruction) of the duty ratio according to the rated heating quantity of the tested machine and the rated power of the electric heater 3, and sends a control signal to the power regulator 4, and the pulse width control module controls output according to the duty ratio after receiving the duty ratio. The number of the power regulators 4 is the same as the number of the groups of the electric heaters 3, namely, the plurality of power regulators 4 correspondingly regulate the input power of the plurality of groups of the electric heaters 3 one by one.
In conclusion, the power of the electric heating calibration device provided by the utility model can be adjusted, so that the tested machines with different heating capacities can be simulated; the three-phase power line is connected with the electric heater, and a 380V three-phase alternating current power supply is adopted for supplying power, so that large current required by experiments can be covered; the heat insulation material is arranged outside the metal cylinder of the calibration device, so that the heat insulation performance of the calibration device is improved, heat leakage and heat accumulation during the calibration test are accurately calibrated, and the measurement accuracy of the calibration test is improved.
It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. The electric heating calibration device is characterized by comprising a metal cylinder and an electric heating assembly; wherein,,
the outer surface of the metal cylinder body is provided with a heat insulation structure;
the electric heating assembly comprises an electric heater, a three-phase power line and a power regulator, wherein the electric heater is arranged in the metal cylinder and is used for heating water contained in the metal cylinder, the three-phase power line is connected with the electric heater, the power regulator is connected with the electric heater in series through the three-phase power line, and the power regulator regulates the input power of the electric heater in a mode of changing the voltage at two ends of the electric heater.
2. The electrical heating calibration apparatus of claim 1, wherein the thermal insulation structure is thermal insulation cotton disposed on an outer surface of the metal cylinder.
3. The electrical heating calibration device according to claim 1, wherein the thermal insulation structure comprises a thermal insulation cylinder arranged outside the metal cylinder, a vacuum cavity is arranged between the thermal insulation cylinder and the metal cylinder, and thermal insulation cotton is arranged on the outer surface of the thermal insulation cylinder.
4. The electrical heating calibration apparatus of claim 1, further comprising an on-off device connected in series with the electric heater by a three-phase power line.
5. The electrical heating calibration device of claim 4, wherein the on-off device is an air switch.
6. The electric heating calibration device according to claim 4, wherein the electric heaters are provided with a plurality of groups, and the on-off device adjusts the input power of the plurality of groups of electric heaters in a manner of controlling whether each group of electric heaters is connected for heating.
7. The electrical heating calibration apparatus of claim 6, further comprising a control module, wherein the on-off device is a relay, wherein the control module is coupled to the on-off device and the power regulator, and wherein the control module is configured to send an adjustment command to the on-off device and the power regulator to adjust the input power of the electrical heater.
8. The electrical heating calibration device according to claim 1, wherein a water inlet, a water outlet, a drain valve and an exhaust valve are arranged on the metal cylinder, and two supporting legs are arranged at the bottom of the cylinder.
9. The electrical heating calibration apparatus of claim 1, wherein the metal cylinder is made of stainless steel material.
10. The electrical heating calibration device according to any one of claims 1-9, wherein a ground wire is connected to the metal cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320236622.9U CN219607400U (en) | 2023-02-15 | 2023-02-15 | Electric heating calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320236622.9U CN219607400U (en) | 2023-02-15 | 2023-02-15 | Electric heating calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219607400U true CN219607400U (en) | 2023-08-29 |
Family
ID=87757539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320236622.9U Active CN219607400U (en) | 2023-02-15 | 2023-02-15 | Electric heating calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219607400U (en) |
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2023
- 2023-02-15 CN CN202320236622.9U patent/CN219607400U/en active Active
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