Small water sample thermostat for chemical instrument test

Abstract

The utility model discloses a small water sample thermostatic device for chemical instrument inspection, small water sample thermostatic device for chemical instrument inspection includes: casing, control circuit board and semiconductor refrigeration piece. The casing has the water storage cavity and the device cavity, is equipped with the baffle between water storage cavity and device cavity, and the opposite sides of casing along the first direction are formed with the water inlet and the drain respectively, and water storage cavity is connected with the water inlet and the drain, control circuit board is located in device cavity, semiconductor refrigeration piece is located in device cavity and is connected with control circuit board electricity, and semiconductor refrigeration piece is used for adjusting the temperature of the water in water storage cavity. According to the utility model embodiment's small water sample thermostatic device for chemical instrument inspection, makes water from the water inlet into water storage cavity, and the temperature of the water in water storage cavity is regulated to the detection temperature through semiconductor refrigeration piece and is discharged from the water outlet, so that the water sample reaches the detection temperature and carries out water sample detection, reduces the error of water sample detection caused by temperature difference, and improves the accuracy of water sample detection.

Description

Technical Field

[0001] This utility model relates to the field of water quality analysis technology, and in particular to a small water sample constant temperature device for chemical instrument testing. Background Technology

[0002] Online chemical instruments play a crucial role in chemical monitoring and technical diagnostics of thermal equipment in power generation enterprises. The accuracy and reliability of these instruments directly affect the safe, stable, and economical operation of generator sets. As generator capacity continues to increase, the requirements for steam and water quality also become more stringent. This places higher demands on the accuracy and timeliness of steam and water testing. When traditional manual sampling and measurement cannot meet the requirements of high-parameter, large-capacity generator sets for steam and water quality analysis and testing, online chemical instruments are being widely used to replace traditional methods.

[0003] Due to differences in the manufacturers and manufacturing years of steam and water sampling systems at various power generation companies, the water outlet from the sampling tubes often fails to reach the required testing temperature. While most online chemical instruments possess temperature compensation capabilities, the compensation value is not a simple equation and cannot be directly estimated, resulting in suboptimal compensation effects. Excessive temperature readings leading to excessive measurement errors in online pH, conductivity, and dissolved oxygen meters are a major cause of poor instrument accuracy. Therefore, developing a small-scale water sample constant-temperature device suitable for on-site chemical instrument testing is of significant importance to power generation companies. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a small water sample constant temperature device for chemical instrument testing. This small water sample constant temperature device directly regulates the water sample temperature to the required detection temperature without the need for temperature compensation, thereby reducing the error in water sample detection caused by temperature difference and improving the accuracy of subsequent water sample testing.

[0005] A small water sample constant temperature device for chemical instrument testing according to an embodiment of the present invention includes: a housing, a control circuit board, a semiconductor cooling chip, and a temperature sensor. The housing has a water storage chamber and a device chamber, with a partition between the water storage chamber and the device chamber. An inlet and an outlet are formed on opposite sides of the housing along a first direction, and the water storage chamber connects the inlet and the outlet. The control circuit board is disposed within the device chamber. The semiconductor cooling chip is disposed within the device chamber and electrically connected to the control circuit board, and is used to regulate the temperature of the water in the water storage chamber. The temperature sensor is electrically connected to the control circuit board and is disposed adjacent to the outlet for detecting the outlet water temperature.

[0006] According to the embodiment of this utility model, a small water sample constant temperature device for chemical instrument testing allows water to enter the water storage chamber from the inlet. The temperature of the water in the water storage chamber is regulated to the detection temperature by a semiconductor cooling chip and then discharged from the outlet. This allows the water sample to be tested after reaching the detection temperature, reducing the error in water sample testing caused by temperature difference and improving the accuracy of water sample testing.

[0007] According to some embodiments of the present invention, at least a portion of the partition is a heat-conducting plate, and the semiconductor cooling chip is thermally connected to the heat-conducting plate.

[0008] According to some embodiments of the present invention, a heat insulation layer is provided between the control circuit board and the partition.

[0009] According to some embodiments of the present invention, the housing is provided with ventilation holes, which connect the device cavity with the external environment.

[0010] According to some embodiments of the present invention, a small water sample constant temperature device includes a heat dissipation plate, which is thermally connected to the control circuit board, and the heat dissipation plate is located between the control circuit board and the ventilation hole.

[0011] According to some embodiments of the present invention, the control circuit board and the semiconductor cooling chip are arranged along the first direction.

[0012] According to some embodiments of the present invention, a small water sample constant temperature device includes a temperature adjustment switching component, which includes a first switching circuit, a second switching circuit, and a power supply circuit. The first switching circuit is connected to the N-terminal and P-terminal of the semiconductor cooling chip, the second switching circuit is connected to the N-terminal and P-terminal of the semiconductor cooling chip, and the power supply circuit can be selectively connected to one of the first switching circuit and the second switching circuit.

[0013] When the power supply circuit is connected to the first switching circuit, the positive terminal of the power supply circuit is connected to the N terminal, and the negative terminal of the power supply circuit is connected to the P terminal.

[0014] When the power supply circuit is connected to the second switching circuit, the positive terminal of the power supply circuit is connected to the P terminal, and the negative terminal of the power supply circuit is connected to the N terminal.

[0015] According to some embodiments of the present invention, the first switching circuit has a first connection terminal and a second connection terminal spaced apart, the second switching circuit has a third connection terminal and a fourth connection terminal spaced apart, and the power supply circuit includes a power supply and a double-pole double-throw switch, wherein the double-pole double-throw switch is connected to the positive and negative terminals of the power supply.

[0016] When the power supply circuit is connected to the first switching circuit, the double-pole double-throw switch is electrically connected to the first connection terminal and the second connection terminal of the first switching circuit;

[0017] When the power supply circuit is connected to the second switching circuit, the double-pole double-throw switch is electrically connected to the third connection terminal and the fourth connection terminal of the second switching circuit.

[0018] According to some embodiments of the present invention, a small water sample constant temperature device includes a temperature control operation panel, which has a temperature setting interface and is electrically connected to the control circuit board.

[0019] According to some embodiments of the present invention, the temperature control operation panel is located on the side of the device cavity opposite to the water storage cavity.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a top view of a small water sample constant temperature device for chemical instrument testing according to some embodiments of the present invention;

[0023] Figure 2 yes Figure 1 Front view of a small to medium-sized water sample constant temperature device;

[0024] Figure 3 This is a control circuit diagram of a semiconductor refrigeration chip for a small water sample constant temperature device for chemical instrument testing according to some embodiments of the present invention.

[0025] Figure label:

[0026] 100. Small-scale water sample constant temperature device;

[0027] 10. Housing; 11. Water storage chamber; 12. Component chamber; 13. Partition; 14. Water inlet; 15. Drain outlet; 16. Ventilation hole;

[0028] 20. Control circuit board; 21. Heat insulation layer; 22. Heat sink; 23. Temperature sensor; 24. Temperature control operation panel;

[0029] 30. Semiconductor cooling chip; 31. Temperature regulation switching component; 32. First switching circuit; 321. First connection terminal; 322. Second connection terminal; 33. Second switching circuit; 331. Third connection terminal; 332. Fourth connection terminal; 34. Power supply circuit; 341. Power supply; 342. Double-pole double-throw switch. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] The following is for reference. Figures 1-3 Description of a small water sample constant temperature device 100 for chemical instrument testing according to an embodiment of the present invention.

[0032] Reference Figures 1-2 According to an embodiment of the present invention, a small water sample constant temperature device 100 for chemical instrument testing includes: a housing 10, a control circuit board 20, a semiconductor cooling chip 30, and a temperature sensor 23.

[0033] The housing 10 has a water storage chamber 11 and a device chamber 12, with a partition 13 between them. A water inlet 14 and a drain outlet 15 are formed on opposite sides of the housing 10 along a first direction, and the water storage chamber 11 connects to the water inlet 14 and the drain outlet 15. The water storage chamber 11 is used to hold water, and the device chamber 12 is used to hold the control circuit board 20 and the semiconductor cooling chip 30. Water can enter through the water inlet 14 and exit through the drain outlet 15.

[0034] The control circuit board 20 is located inside the device cavity 12, and the semiconductor cooling chip 30 is located inside the device cavity 12 and is electrically connected to the control circuit board 20. The control circuit board 20 can be used to control the semiconductor cooling chip 30, and the semiconductor cooling chip 30 is used to adjust the temperature of the water in the water storage cavity 11.

[0035] Temperature sensor 23 is electrically connected to control circuit board 20. Temperature sensor 23 is located near drain outlet 15 and is used to detect water temperature. Temperature sensor 23 can detect water temperature in water storage chamber 11. Setting it near drain outlet 15 can improve the accuracy of water temperature detection. Temperature sensor 23 is electrically connected to control circuit board 20 and transmits water temperature information to control circuit board 20.

[0036] When the water temperature in the water storage chamber 11 is higher than the detection temperature, the semiconductor cooling chip 30 absorbs heat from the water in the water storage chamber 11, thereby reducing the temperature of the water sample in the water storage chamber 11 to reach the detection temperature. When the water sample temperature in the water storage chamber 11 reaches the detection temperature, it is discharged from the drain outlet 15 and subsequent corresponding tests are performed.

[0037] When the water temperature in the water storage chamber 11 is lower than the detection temperature, the semiconductor cooling chip 30 releases heat to the water in the water storage chamber 11, thereby raising the water sample temperature in the water storage chamber 11 to reach the detection temperature. When the water sample temperature in the water storage chamber 11 reaches the detection temperature, it is discharged from the drain outlet 15 and subsequent corresponding tests are performed.

[0038] When water sample testing is required, the water from the sampling port is first connected to the inlet 14 of the small water sample constant temperature device 100 via a flexible hose, allowing the water to flow into the storage chamber 11. The control circuit board 20 controls the semiconductor cooling chip 30 to regulate the water temperature. When the water temperature in the storage chamber 11 is higher than the detection temperature, the semiconductor cooling chip 30 absorbs heat from the water in the storage chamber 11, causing the water temperature to decrease. When the water temperature in the storage chamber 11 is lower than the detection temperature, the semiconductor cooling chip 30 releases heat from the water in the storage chamber 11, causing the water temperature to increase. When the water temperature in the storage chamber 11 reaches the detection temperature, the water is discharged from the drain port 15 of the small water sample constant temperature device 100. The pH value, conductivity, and dissolved oxygen rate of the water sample are then measured using instruments such as an online pH meter, an online conductivity meter, and an online dissolved oxygen meter.

[0039] According to the embodiment of the present invention, the small water sample constant temperature device 100 for chemical instrument testing allows water to enter the water storage chamber 11 from the inlet 14. The temperature of the water in the water storage chamber 11 is regulated to the detection temperature by the semiconductor cooling chip 30 and then discharged from the outlet. This allows the water sample to be tested after reaching the detection temperature without the need for temperature compensation, reducing the error in water sample testing caused by temperature difference and improving the accuracy of water sample testing.

[0040] According to some embodiments of the present invention, at least a portion of the partition 13 is a heat-conducting plate, and the semiconductor cooling chip 30 is thermally connected to the heat-conducting plate. For example, the partition 13 being at least a heat-conducting plate can mean that a part of the partition 13 is a heat-conducting plate, or that the entire partition 13 is a heat-conducting plate. By providing a heat-conducting plate, the semiconductor cooling chip 30 can be thermally connected to the heat-conducting plate, thereby enabling the semiconductor cooling chip 30 to transfer heat to the water in the water storage chamber 11.

[0041] According to some embodiments of this utility model, a heat insulation layer 21 is provided between the control circuit board 20 and the partition 13. The heat insulation layer 21 between the control circuit board 20 and the partition 13 can isolate heat and prevent the heat generated by the control circuit board 20 from being transferred into the water storage chamber 11 and affecting the accuracy of water temperature regulation in the water storage chamber 11.

[0042] According to some embodiments of this utility model, the housing 10 is provided with ventilation holes 16, which connect the device cavity 12 to the external environment. The ventilation holes 16 connect the device cavity 12 to the external environment, serving to dissipate heat from the inside of the device cavity 12. For example, heat generated during the operation of the control circuit board 20 can be dissipated to the outside of the housing 10 through the ventilation holes 16, preventing the control circuit board 20 from overheating and damaging the small water sample constant temperature device 100.

[0043] According to some embodiments of this utility model, the small water sample constant temperature device 100 includes a heat dissipation plate 22, which is thermally connected to the control circuit board 20 and is located between the control circuit board 20 and the ventilation hole 16. The heat dissipation plate 22 serves to dissipate heat from the control circuit board 20. Heat generated during operation of the control circuit board 20 is transferred to the heat dissipation plate 22, which then dissipates the heat to the outside of the housing 10 through the ventilation hole 16, preventing overheating of the control circuit board 20 and damage to the small water sample constant temperature device 100.

[0044] According to some embodiments of this utility model, the control circuit board 20 and the semiconductor cooling chip 30 are arranged along a first direction. This allows for the utilization of the space along the first direction in the device cavity 12, resulting in a compact overall structure.

[0045] For example, the first direction can be referenced Figure 1 In the e1 direction.

[0046] Reference Figure 3 According to some embodiments of the present invention, a small water sample constant temperature device 100 includes a temperature adjustment switching component 31. The temperature adjustment switching component 31 includes a first switching circuit 32, a second switching circuit 33, and a power supply circuit 34. The first switching circuit 32 is connected to the N-terminal and the P-terminal of the semiconductor cooling chip 30, and the second switching circuit 33 is connected to the N-terminal and the P-terminal of the semiconductor cooling chip 30. The power supply circuit 34 can be selectively connected to one of the first switching circuit 32 and the second switching circuit 33. When the power supply circuit 34 is connected to the first switching circuit 32, the positive terminal of the power supply circuit 34 is connected to the N-terminal, and the negative terminal of the power supply circuit 34 is connected to the P-terminal. When the power supply circuit 34 is connected to the second switching circuit 33, the positive terminal of the power supply circuit 34 is connected to the P-terminal, and the negative terminal of the power supply circuit 34 is connected to the N-terminal.

[0047] The power supply circuit 34 provides power and can be connected to either the first switching circuit 32 or the second switching circuit 33. At any given time, the power supply circuit 34 can only be connected to one of the first switching circuit 32 or the second switching circuit 33.

[0048] For example, when the power supply circuit 34 is connected to the first switching circuit 32, the positive terminal of the power supply circuit 34 is connected to the N terminal of the thermoelectric cooler 30, and the negative terminal of the power supply circuit 34 is connected to the P terminal of the thermoelectric cooler 30. At this time, the thermoelectric cooler 30 is in a cooling state, and the thermoelectric cooler 30 absorbs heat from the water in the water storage chamber 11, thereby lowering the water temperature in the water storage chamber 11. When the power supply circuit 34 is connected to the second switching circuit 33, the positive terminal of the power supply circuit 34 is connected to the P terminal of the thermoelectric cooler 30, and the negative terminal of the power supply circuit 34 is connected to the N terminal of the thermoelectric cooler 30. At this time, the thermoelectric cooler 30 is in a heating state, and the thermoelectric cooler 30 releases heat from the water in the water storage chamber 11.

[0049] Reference Figure 3 According to some embodiments of the present invention, the first switching circuit 32 has a first connection terminal 321 and a second connection terminal 322 spaced apart, the second switching circuit 33 has a third connection terminal 331 and a fourth connection terminal 332 spaced apart, and the power supply circuit 34 includes a power supply 341 and a double-pole double-throw switch 342, the double-pole double-throw switch 342 being connected to the positive and negative terminals of the power supply 341; when the power supply circuit 34 is connected to the first switching circuit 32, the double-pole double-throw switch 342 is electrically connected to the first connection terminal 321 and the second connection terminal 322 of the first switching circuit 32; when the power supply circuit 34 is connected to the second switching circuit 33, the double-pole double-throw switch 342 is electrically connected to the third connection terminal 331 and the fourth connection terminal 332 of the second switching circuit 33.

[0050] For example, when the water temperature in the water storage chamber 11 is higher than the detection temperature, the double-pole double-throw switch 342 is turned on to the cooling state. The power supply circuit 34 is connected to the first switching circuit 32. The positive terminal of the power supply circuit 34 is connected to the N terminal of the semiconductor cooling chip 30 through the first connection terminal 321, and the negative terminal of the power supply circuit 34 is connected to the P terminal of the semiconductor cooling chip 30 through the second connection terminal 322. At this time, the semiconductor cooling chip 30 is in the cooling state. The semiconductor cooling chip 30 absorbs heat from the water in the water storage chamber 11, thereby lowering the water temperature in the water storage chamber 11.

[0051] For example, when the water temperature in the water storage chamber 11 is lower than the detection temperature, the double-pole double-throw switch 342 is turned on to the heating state. When the power supply circuit 34 is connected to the second switching circuit 33, the positive terminal of the power supply circuit 34 is connected to the P terminal of the semiconductor cooling chip 30 through the third connection terminal 331, and the negative terminal of the power supply circuit 34 is connected to the N terminal of the semiconductor cooling chip 30 through the fourth connection terminal 332. At this time, the semiconductor cooling chip 30 is in the heating state, and the semiconductor cooling chip 30 releases heat to the water in the water storage chamber 11, causing the water temperature in the water storage chamber 11 to rise.

[0052] Reference Figure 2 According to some embodiments of the present invention, the small water sample constant temperature device 100 includes a temperature control operation panel 24, which has a temperature setting interface and is electrically connected to the control circuit board 20.

[0053] The temperature control panel can adjust the preset temperature through the temperature control setting page. The preset temperature can be set as the detection temperature. The temperature control panel is electrically connected to the control circuit board 20 and can obtain the water outlet temperature information. When the water outlet temperature meets the preset temperature in the temperature control panel, it indicates that the water temperature meets the detection temperature requirements for water sample testing. The water in the water storage chamber 11 can be discharged from the drain outlet 15 for water sample testing.

[0054] According to some embodiments of this utility model, the temperature control operation panel 24 is located on the side of the device cavity 12 away from the water storage cavity 11. Positioning the temperature control operation panel 24 on the side of the device cavity 12 away from the water storage cavity 11 facilitates temperature observation and operation.

[0055] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A small-scale water sample constant temperature device for chemical instrument testing, characterized in that, include: The housing has a water storage cavity and a device cavity inside, and a partition is provided between the water storage cavity and the device cavity. The housing has a water inlet and a water outlet on opposite sides along a first direction, and the water storage cavity is connected to the water inlet and the water outlet. A control circuit board is disposed inside the cavity of the device; A semiconductor cooling chip is disposed inside the device cavity and electrically connected to the control circuit board. The semiconductor cooling chip is used to regulate the temperature of the water in the water storage cavity. A temperature sensor, electrically connected to the control circuit board, is located near the drain outlet and is used to detect the outlet water temperature.

2. The small water sample constant temperature device for chemical instrument testing according to claim 1, characterized in that, At least a portion of the partition is a heat-conducting plate, and the semiconductor cooling chip is thermally connected to the heat-conducting plate.

3. The small water sample constant temperature device for chemical instrument testing according to claim 1, characterized in that, A heat insulation layer is provided between the control circuit board and the partition.

4. The small water sample constant temperature device for chemical instrument testing according to claim 1, characterized in that, The housing is provided with ventilation holes, which connect the device cavity to the external environment.

5. The small water sample constant temperature device for chemical instrument testing according to claim 4, characterized in that, It includes a heat sink, which is thermally connected to the control circuit board and is located between the control circuit board and the ventilation hole.

6. The small water sample constant temperature device for chemical instrument testing according to claim 1, characterized in that, The control circuit board and the semiconductor cooling chip are arranged along the first direction.

7. The small water sample constant temperature device for chemical instrument testing according to claim 1, characterized in that, The device includes a temperature regulation switching component, which includes a first switching circuit, a second switching circuit, and a power supply circuit. The first switching circuit is connected to the N-terminal and the P-terminal of the thermoelectric cooler, the second switching circuit is connected to the N-terminal and the P-terminal of the thermoelectric cooler, and the power supply circuit can be selectively connected to one of the first switching circuit and the second switching circuit. When the power supply circuit is connected to the first switching circuit, the positive terminal of the power supply circuit is connected to the N terminal, and the negative terminal of the power supply circuit is connected to the P terminal. When the power supply circuit is connected to the second switching circuit, the positive terminal of the power supply circuit is connected to the P terminal, and the negative terminal of the power supply circuit is connected to the N terminal.

8. The small water sample constant temperature device for chemical instrument testing according to claim 7, characterized in that, The first switching circuit has a first connection terminal and a second connection terminal that are spaced apart, the second switching circuit has a third connection terminal and a fourth connection terminal that are spaced apart, and the power supply circuit includes a power supply and a double-pole double-throw switch, wherein the double-pole double-throw switch is connected to the positive and negative terminals of the power supply. When the power supply circuit is connected to the first switching circuit, the double-pole double-throw switch is electrically connected to the first connection terminal and the second connection terminal of the first switching circuit; When the power supply circuit is connected to the second switching circuit, the double-pole double-throw switch is electrically connected to the third connection terminal and the fourth connection terminal of the second switching circuit.

9. The small water sample constant temperature device for chemical instrument testing according to claim 1, characterized in that, A temperature control operation panel, which has a temperature setting interface, is electrically connected to the control circuit board.

10. The small water sample constant temperature device for chemical instrument testing according to claim 9, characterized in that, The temperature control panel is located on the side of the device cavity opposite to the water storage cavity.

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