A cooling and heating device for a dental pulp vitality tester

Abstract

The present invention relates to a cooling and heating device for a dental pulp vitality tester, comprising a vortex tube body, a vortex generating wheel fixing ring, a cold and hot separation cone, a hot end, a cold end and a controller, an air inlet pipe is arranged on the top of the vortex tube body, a vortex generating wheel is arranged in the left axial inner cavity of the vortex tube body, a vortex generating wheel fixing ring is pressed against the vortex generating wheel and is sleeved in one end of the vortex tube body, one end of the cold end is connected to the vortex generating wheel fixing ring, a cold end test head is arranged at the other end of the cold end, a first temperature sensor is arranged on the cold end, a cold and hot separation cone is arranged in the right axial inner cavity of the vortex tube body, the vortex tube body is connected to the hot end test head through the hot end, a second temperature sensor is arranged on the hot end, and the first temperature sensor and the second temperature sensor are electrically connected to the controller. The present invention can not only meet the requirements of dental pulp cold and hot testing at the same time and reduce noise pollution, but also has a compact structure, stable operation, and is easy to carry, and can meet the power demand by using ordinary lithium batteries.

Description

Technical Field

[0001] The invention relates to the technical field of dental measuring instruments, in particular to a cooling and heating device of a dental pulp vitality tester. Background Art

[0002] The pulp tissue has the functions of forming dentin, providing nutrition, transmitting pain, and producing a protective response to external stimuli. Clinical judgment of the vitality of the pulp is the basis for determining the choice of treatment plan and evaluating the treatment effect. In recent years, some medical experts have found through research and testing that pulp vitality can be tested by electricity, heat, and cold. The instruments on the market that test pulp vitality are mainly electric vitality pulp vitality testers. There are also very few pulp vitality testers with thermal vitality tests. Thermal vitality tests rely on current flowing through a resistor to generate heat and produce a constant temperature to achieve thermal vitality tests. However, cold vitality testers are still in the theoretical stage and have not been commercialized. When doctors want to use cold vitality tests, they take ice cubes from the refrigerator to achieve the purpose of cold vitality tests.

[0003] The current cold test of dental pulp vitality instruments generally remains in the theoretical stage and has not been commercialized. Querying the patent number 201811252645.9, the refrigeration method engraved in the patent uses semiconductor refrigeration, that is, thermoelectric effect refrigeration. This solution is generally used in micro-refrigerated refrigerators, using semiconductor refrigeration chips instead of refrigerator compressors. However, this solution is only an ideal state for dental pulp vitality testers and cannot be applied in practice for the following reasons: a. The refrigeration efficiency is low, and the refrigeration energy efficiency ratio is always less than 1, while the refrigeration energy efficiency ratio of ordinary refrigerator compressors is above 3.0; b. The refrigeration temperature difference is small. Refrigerators made of semiconductor refrigeration chips can generally only be used for refrigeration, because the temperature difference between the cold end and the hot end of the semiconductor refrigeration chip is fixed. If the heat If the temperature of the cold end is high, the temperature of the cold end cannot be lowered, and the hot end needs to rely on fan heat dissipation to lower its own temperature; c. Poor thermal insulation effect. There are multiple sets of PN junction thermocouples between the cold end and the hot end of the semiconductor refrigeration plate. The P pole and the N pole themselves are also high thermal conductivity materials. During the semiconductor refrigeration process, the cold end and the hot end are also constantly conducting heat. Especially when the temperature difference between the cold end and the hot end reaches the maximum value, the more obvious the heat exchange is, the worse the thermal insulation effect is; d. High cooling power. The working voltage of the semiconductor refrigeration plate is generally 5-24V, and the working current is above 5A. The battery of general portable handheld devices cannot meet the power requirements of semiconductor refrigeration. If the semiconductor refrigeration solution is applied to a handheld pulp vitality tester, an external high-power adapter is required. The heat dissipation end must not only be large enough, but also equipped with a powerful fan for heat dissipation. These make the volume of the semiconductor refrigeration device very large, the weight becomes heavier, and it is not easy for doctors to operate. Summary of the invention

[0004] In view of the above problems, the present invention provides a cooling and heating device for a dental pulp vitality tester which can simultaneously meet the requirements of dental pulp cold and hot testing and has a compact structure, stable operation and is easy to carry.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a cooling and heating device of a dental pulp vitality tester, including a vortex tube main body, a vortex generating wheel fixing ring, a hot and cold separation cone, a hot end, a cold end and a controller, the top of the vortex tube main body is provided with an air inlet pipe, the left axial inner cavity of the vortex tube main body is provided with a vortex generating wheel, the vortex generating wheel fixing ring is pressed against the vortex generating wheel and is sleeved in one end of the vortex tube main body, one end of the cold end is connected to the vortex generating wheel fixing ring, the other end of the cold end is provided with a cold end test head, the cold end is provided with a first temperature sensor, the bottom air outlet of the cold end is provided with a first muffler, and the vortex tube A hot and cold separation cone is provided in the right axial inner cavity of the main body, the vortex tube main body is connected to the hot end test head through the hot end, a second temperature sensor is provided on the hot end, a gas flow controller and a second muffler are provided in sequence at the bottom gas outlet of the hot end, the controller includes a main control board and a display screen, the first temperature sensor and the second temperature sensor are electrically connected to the controller, the first temperature sensor and the second temperature sensor respectively collect temperature signals of the cold end and the hot end, and transmit them to the main control board, the main control board controls the gas flow controller by receiving the temperature signal, so that the cold end and the hot end are constant at the set temperature value, and the temperature is displayed on the display screen.

[0006] Preferably, the vortex tube body comprises a first vortex tube, a second vortex tube and a third vortex tube which are interconnected, the inner diameter of the first vortex tube is larger than the outer diameter of the vortex generating wheel fixing ring, the vortex generating wheel fixing ring is pressed against the vortex generating wheel and is sleeved in the first vortex tube, the inner diameter of the vortex generating wheel is smaller than the inner diameter of the second vortex tube, the inner diameter of the second vortex tube is smaller than the inner diameter of the third vortex tube, and the inner cavity of the second vortex tube is provided with a hot and cold separation cone.

[0007] Preferably, a first guide plate is provided in the cold end, one end of the first guide plate close to the vortex generating wheel fixing ring is vertically fixed to the right side of the bottom air outlet of the cold end, and the other end of the first guide plate is arranged along the left axial direction of the cold end.

[0008] Preferably, a second guide plate is provided in the hot end, one end of the second guide plate close to the vortex tube body is vertically fixed to the left side of the bottom air outlet of the hot end, and the other end of the second guide plate is arranged along the right axial direction of the hot end.

[0009] Preferably, the cold and hot separation cone is sleeved in the second vortex tube via a threaded structure, and a limiting protrusion is provided at the front end of the cold and hot separation cone.

[0010] Preferably, the cold end, the cold end test head, the hot end and the hot end test head are all made of metal.

[0011] Preferably, the controller is powered by a lithium battery.

[0012] Preferably, a sealing ring is provided at the connection between the vortex generating wheel and the vortex generating wheel fixing ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention can meet the cold and hot test requirements of the dental pulp vitality tester through the cold end test head at the cold end and the hot end test head at the hot end;

[0015] 2. The vortex tube in the present invention does not require power supply for cooling and heating. Only the controller needs to control and display the temperature, so the power consumption is very small, and ordinary lithium batteries can meet the power demand;

[0016] 3. The cold airflow and hot airflow of the present invention are discharged from the first muffler and the second muffler respectively, which can greatly reduce the noise generated when the gas is discharged and improve the auditory environment of the doctor's studio;

[0017] 4. The present invention has a compact structure and is easy to carry;

[0018] 5. The structural parts of the present invention have no moving parts, run stably, and require no maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 is an exploded view of the present invention;

[0022] Figure 4 yes Figure 2 Schematic diagram of the structure of the vortex generating wheel.

[0023] In the figure, 1. vortex tube body; 2. vortex generating wheel; 3. intake pipe; 4. hot and cold separation cone; 5. sealing ring; 6. vortex generating wheel fixing ring; 7. cold end; 8. first temperature sensor; 9. cold end test head; 10. first muffler; 11. hot end; 12. hot end test head; 13. second temperature sensor; 14. gas flow controller; 15. second muffler; 16. first vortex tube; 17. second vortex tube; 18. third vortex tube; 19. first guide plate; 20. second guide plate. DETAILED DESCRIPTION

[0024] The following will be combined Figure 1-4The present invention is described in detail. The exemplary embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0025] A cooling and heating device for a dental pulp vitality tester comprises a vortex tube body 1, a vortex generating wheel fixing ring 6, a hot and cold separation cone 4, a hot end 11, a cold end 7 and a controller. An air inlet pipe 3 is arranged on the top of the vortex tube body 1, and a sealing device is arranged at the connection to prevent air leakage. A vortex generating wheel 2 is arranged in the left axial inner cavity of the vortex tube body 1, and the vortex generating wheel fixing ring 6 is pressed against the vortex generating wheel 2 and is sleeved in one end of the vortex tube body 1. One end of the cold end 7 is connected to the vortex generating wheel fixing ring 6, and they are generally connected by a threaded structure, and a sealing device is arranged at the threaded connection. A cold end test head 9 is arranged at the other end of the cold end 7, and a first temperature sensor 8 is arranged on the cold end 7 for collecting the temperature signal of the cold end surface. A first muffler 10 is arranged at the bottom air outlet of the cold end 7, and a hot and cold separation cone 4 is arranged in the right axial inner cavity of the vortex tube body 1. The vortex tube body 1 is connected to the hot end test head through the hot end 11. The hot end 11 is connected to the test head 12, and a second temperature sensor 13 is provided on the hot end 11 to collect the temperature signal of the hot end surface. A gas flow controller 14 and a second muffler 15 are provided at the bottom air outlet of the hot end 11 in sequence. The controller includes a main control board and a display screen. The first temperature sensor 8 and the second temperature sensor 13 are electrically connected to the controller. The first temperature sensor 8 and the second temperature sensor 13 collect the temperature signals of the cold end 7 and the hot end 11 respectively, and transmit them to the main control board. The main control board controls the gas flow controller 14 by receiving the temperature signal. By adjusting the gas flow controller 14, the flow rate of the hot air flow is controlled, so that the cold end 7 and the hot end 11 are kept constant at the set temperature value, and the temperature is displayed on the display screen. The temperature of the cold end 7 and the hot end 11 can be known at any time, which is convenient for timely adjusting the gas flow controller, thereby controlling the temperature of the cold end test head 9 and the hot end test head 12.

[0026] The vortex tube body 1 includes a first vortex tube 16, a second vortex tube 17 and a third vortex tube 18 which are interconnected. The inner diameter of the first vortex tube 16 is larger than the outer diameter of the vortex generating wheel fixing ring 6. The vortex generating wheel fixing ring 6 is pressed against the vortex generating wheel 2 and is sleeved in the first vortex tube 16. The inner diameter of the vortex generating wheel 2 is smaller than the inner diameter of the second vortex tube 17. The inner diameter of the second vortex tube 17 is smaller than the inner diameter of the third vortex tube 18, and a hot and cold separation cone 4 is provided in the inner cavity of the second vortex tube 17.

[0027] A first guide plate 19 is provided in the cold end 7. One end of the first guide plate 19 close to the vortex generating wheel fixing ring 6 is vertically fixed to the right side of the bottom air outlet of the cold end 7. The other end of the first guide plate 19 is arranged along the left axial direction of the cold end 7. By arranging the first guide plate 19, the heat conduction area during the heat exchange process of the cold end can be increased.

[0028] A second guide plate 20 is provided in the hot end 11. One end of the second guide plate 20 close to the vortex tube body 1 is vertically fixed to the left side of the bottom air outlet of the hot end 11, and the other end of the second guide plate 20 is arranged along the right axial direction of the hot end 11. By arranging the second guide plate 20, the heat conduction area during the heat exchange process of the hot end can be increased.

[0029] The hot and cold separation cone 4 is sleeved in the second vortex tube 17 through a threaded structure, and a limiting protrusion is provided at the front end of the hot and cold separation cone 4, which can further limit the hot and cold separation cone 4 so that the hot and cold separation cone 4 fits tightly with the second vortex tube 17.

[0030] The cold end 7, the cold end test head 9, the hot end 11 and the hot end test head 12 are all made of metal, which can better perform heat exchange.

[0031] The controller is powered by a lithium battery, and ordinary lithium batteries can meet the power requirements, so it is easy to carry.

[0032] A sealing ring 5 is provided at the connection between the vortex generating wheel 2 and the vortex generating wheel fixing ring 6 to ensure airtightness between the two.

[0033] During the implementation process, the lithium battery is responsible for providing power to the controller, and the display screen fixing base fixes the display screen and the control board together. When the hot end 11 is used as the test end, the temperature of the hot end 11 is set first, and the air inlet pipe 3 on the vortex tube body 1 is connected to 0.6-1.0Mpa compressed air (0.7Mpa compressed air is standard in all dental clinics and oral hospitals). The compressed air enters the first vortex tube 16, and forms a vortex gas with a rotation speed of about 1000000rpm when passing through the vortex generating wheel 2. The high-speed vortex rotates close to the inner wall of the second vortex tube 17. When the high-speed rotating vortex gas encounters the cold and hot separation cone 4, energy conversion occurs, and the airflow is divided into two cold and hot airflows. The hot airflow is discharged into the hot end 11 along the outer diameter of the cold and hot separation cone 4. Since the hot end 11 is a metal with good thermal conductivity, the heat When the airflow flows through the hot end 11, heat exchange occurs with the hot end 11, and part of the heat of the hot airflow is transferred to the hot end 11, so that the temperature of the hot end 11 increases, and then the airflow flows into the gas flow controller 14. The control panel will collect the temperature signal transmitted by the second temperature sensor 13 on the hot end 11, obtain the temperature parameters, and then compare them with the set temperature parameters, and then send instructions to the gas flow controller 14, so that the gas flow controller 14 increases or decreases the gas flow accordingly, so that the temperature of the surface of the hot end 11 reaches the set value, thereby ensuring the temperature of the hot end test head 12, and displaying the temperature on the display screen in a timely manner. Finally, the hot airflow enters the second muffler 15 from the gas flow controller 14 and is discharged. The gas flowing through the second muffler 15 can greatly reduce the noise generated when the gas is discharged, thereby improving the auditory environment of the doctor's studio.

[0034] Similarly, when the cold end 7 is to be used as a test end, the same method can be used to make the cold end 7 reach the set value. The cold airflow into which the airflow is divided will return along the axial centerline of the inner cavity of the vortex tube body 1, flow from the inner cavity of the vortex tube body 1 into the inner cavity of the vortex generating wheel fixing ring 6, and then flow into the cold end 7. Since the cold end 7 is a metal with good thermal conductivity, the cold airflow exchanges heat with the cold end 7 when flowing through the cold end 7, and part of the heat of the cold end 7 is transferred to the cold airflow, so that the temperature of the cold end 7 is reduced. The control board collects the temperature signal transmitted by the first temperature sensor 8 on the cold end 7, obtains the temperature parameter, and controls the gas flow controller 14, so that the cold end 7 is constant at a certain set temperature value, thereby ensuring the temperature of the cold end test head 9, and the temperature is displayed on the display screen in a timely manner. Finally, the cold airflow enters the first muffler 10 for discharge.

[0035] The cooling and heating methods of the present invention use the eddy current effect, and cooling and heating can be achieved by simply connecting to 0.6-1.0Mpa compressed air. The cooling and heating temperatures can theoretically reach -40° and 110°, respectively, while the hot and cold tests of the dental pulp vitality test only require temperatures below 0° and above 50°. Therefore, the present invention can fully meet the requirements of the dental pulp hot and cold tests. Moreover, the vortex tube cooling and heating scheme does not require electricity. Only electricity is needed to control the temperature and display the temperature, so the power consumption is very small. Ordinary lithium batteries can be used to meet the power requirements. In addition, the structure of the vortex tube cooling and heating scheme can be relatively compact, which is suitable for portable products. The structural parts of the vortex tube cooling and heating scheme have no moving parts, and the operation is stable and maintenance-free.

[0036] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A cooling and heating device for a dental pulp vitality tester, characterized in that: The invention comprises a vortex tube body (1), a vortex generating wheel fixing ring (6), a hot and cold separation cone (4), a hot end (11), a cold end (7) and a first controller, wherein an air inlet pipe (3) is arranged at the top of the vortex tube body (1), a vortex generating wheel (2) is arranged in the left axial inner cavity of the vortex tube body (1), the vortex generating wheel fixing ring (6) is pressed against the vortex generating wheel (2) and is sleeved in one end of the vortex tube body (1), one end of the cold end (7) is connected to the vortex generating wheel fixing ring (6), the other end of the cold end (7) is provided with a cold end test head (9), and a first temperature sensor is arranged on the cold end (7). The bottom air outlet of the cold end (7) is provided with a first muffler (10); the right axial inner cavity of the vortex tube body (1) is provided with a cold-hot separation cone (4); the vortex tube body (1) is connected to a hot end test head (12) via a hot end (11); a second temperature sensor (13) is provided on the hot end (11); a gas flow controller (14) and a second muffler (15) are provided at the bottom air outlet of the hot end (11) in sequence; the first controller comprises a main control board and a display screen; the first temperature sensor (8) and the second temperature sensor (13) are electrically connected to the first controller; the first The temperature sensor (8) and the second temperature sensor (13) respectively collect temperature signals of the cold end (7) and the hot end (11), and transmit them to the main control board. The main control board controls the gas flow controller (14) by receiving the temperature signals, so that the cold end (7) and the hot end (11) are kept constant at a set temperature value, and the temperature is displayed on a display screen. The vortex tube body (1) comprises a first vortex tube (16), a second vortex tube (17) and a third vortex tube (18) which are interconnected. The inner diameter of the first vortex tube (16) is larger than the outer diameter of the vortex generating wheel fixing ring (6). The vortex generating wheel fixing ring ( 6) is pressed against the vortex generating wheel (2) and is sleeved in the first vortex tube (16), the inner diameter of the vortex generating wheel (2) is smaller than the inner diameter of the second vortex tube (17), the inner diameter of the second vortex tube (17) is smaller than the inner diameter of the third vortex tube (18), and the inner cavity of the second vortex tube (17) is provided with a hot and cold separation cone (4), and the cold end (7) is provided with a first guide plate (19), one end of the first guide plate (19) close to the vortex generating wheel fixing ring (6) is vertically fixed to the right side of the bottom air outlet of the cold end (7), and the other end of the first guide plate (19) is arranged along the left axial direction of the cold end (7).

2. The cooling and heating device of the dental pulp vitality tester according to claim 1, characterized in that: A second guide plate (20) is provided in the hot end (11); one end of the second guide plate (20) close to the vortex tube body (1) is vertically fixed to the left side of the bottom air outlet of the hot end (11); and the other end of the second guide plate (20) is arranged along the right axial direction of the hot end (11).

3. The cooling and heating device of the dental pulp vitality tester according to claim 1 is characterized in that: The cold and hot separation cone (4) is sleeved in the second vortex tube (17) via a threaded structure, and a limiting protrusion is provided at the front end of the cold and hot separation cone (4).

4. The cooling and heating device of the dental pulp vitality tester according to claim 1, characterized in that: The cold end (7), the cold end test head (9), the hot end (11) and the hot end test head (12) are all made of metal.

5. The cooling and heating device of the dental pulp vitality tester according to claim 1, characterized in that: The first controller is powered by a lithium battery.

6. The cooling and heating device of the dental pulp vitality tester according to claim 1, characterized in that: A sealing ring (5) is provided at the connection between the vortex generating wheel (2) and the vortex generating wheel fixing ring (6).

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