Liquid heating device and analysis device

Abstract

To provide a liquid heating device capable of efficiently heating a liquid, and an analysis device.SOLUTION: A liquid heating device is provided, comprising a heater, a main body, a flow channel member, a heat transfer member, and a cover member. The main body is heated by the heater and has a groove formed on an outer peripheral surface thereof to extend along an axial direction. The flow channel member is disposed in the groove and has a tubular shape to allow a liquid to flow. The heat transfer member consists of a metal member covering the outer peripheral surface and the flow channel member. The cover member covers the heat transfer member and consists of an elastic member having a lower thermal conductivity than the heat transfer member.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a liquid heating device and an analytical device. [Background technology]

[0002] Conventionally, in an analyzer such as a biochemical analyzer that performs automatic analysis of a specific component present in a specimen such as a body fluid or human tissue, it is necessary to keep the reaction vessel at a constant temperature (e.g., 37°C) when the specimen and a reagent are reacted in the reaction vessel. For this reason, when automatically cleaning the reaction vessel, there is a technology that prevents the temperature of the reaction vessel from decreasing during cleaning by heating the cleaning liquid (detergent, cleaning agent, water, etc.) to a constant temperature using a liquid heating device (see, for example, Patent Document 1).

[0003] For example, Patent Document 1 discloses a technique in which a tube through which a liquid flows is tightly attached to the outer periphery of a cylindrical body in which a heater is embedded, and the tube is fixed from the outside with a resin cover. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6255272 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional technology, the heat of the heater is absorbed by the cover, making it difficult to increase the temperature of the liquid, and therefore the efficiency of heating the liquid cannot be said to be high. Thus, there is room for improvement in the conventional technology in terms of efficiently heating the liquid.

[0006] Therefore, the present disclosure proposes a liquid heating device and a biochemical analyzer capable of efficiently heating a liquid. [Means for solving the problem]

[0007] In order to solve the above problems, the liquid heating device according to the present disclosure includes a heater, a main body, a flow path member, a heat conductive member, and a cover member. The main body is a main body heated by a heater, and has a groove formed on its outer circumferential surface extending along the axial direction. The flow path member is disposed in the groove and is tubular to allow liquid to flow. The heat conductive member is made of a metal member that covers the outer circumferential surface and the flow path member. The cover member covers the heat conductive member and is made of an elastic member having a lower thermal conductivity than the heat conductive member.

[0008] This allows the liquid heating device to heat the liquid efficiently.

[0009] The heat conduction member according to the present disclosure is a divided member that is divided along the axial direction.

[0010] This allows the liquid heating device to facilitate the work of mounting the heat conductive member on the main body.

[0011] The heat conduction member according to the present disclosure is a member having a slit formed along the axial direction.

[0012] This allows the liquid heating device to heat the liquid efficiently.

[0013] Furthermore, the heat conduction member according to the present disclosure is fixed in a state in which the flow path member is pressed against the bottom of the groove.

[0014] This allows the liquid heating device to heat the liquid efficiently.

[0015] Furthermore, the cover member according to the present disclosure is a heat-shrinkable member, and fixes the heat-conductive member in a heat-shrinkable state.

[0016] This allows the liquid heating device to heat the liquid efficiently.

[0017] Furthermore, the thermally conductive member according to the present disclosure has a smaller heat capacity than the cover member.

[0018] This allows the liquid heating device to heat the liquid efficiently.

[0019] Furthermore, the heat conduction member according to the present disclosure has a smaller heat capacity than the main body.

[0020] This allows the liquid heating device to heat the liquid efficiently.

[0021] The heat conducting member according to the present disclosure includes at least an iron member.

[0022] This allows the liquid heating device to heat the liquid efficiently.

[0023] The heat transfer member according to the present disclosure is configured with a first metal part having a first heat capacity on the inner circumferential side, and a second metal part having a second heat capacity larger than the first heat capacity on the outer circumferential side.

[0024] This allows the liquid heating device to heat the liquid efficiently.

[0025] The liquid heating device according to the present disclosure further includes a fuse, the fuse being disposed in the heat conductive member and configured to cut off the supply of power to the heater when the temperature of the heat conductive member reaches or exceeds a threshold value.

[0026] This allows the liquid heating device to accurately prevent the temperature of the liquid from becoming too high.

[0027] The analytical device according to the present disclosure includes the liquid heating device having the above-described configuration.

[0028] This allows the analyzer to efficiently heat the liquid. [Brief description of the drawings]

[0029] [Figure 1] 1 is a top view showing a schematic configuration of a biochemical analysis apparatus according to an embodiment. [Diagram 2] FIG. 2 is a perspective view of a liquid heating device. [Diagram 3] FIG. [Figure 4] FIG. 2 is a cross-sectional view of a liquid heating device. [Diagram 5] FIG. 2 is an end view of the liquid heating device. [Figure 6] 11A and 11B are diagrams illustrating another example of the configuration of the heat conduction member. [Figure 7] 11A and 11B are diagrams illustrating another example of the configuration of the heat conduction member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following embodiments, the same components are designated by the same reference numerals, and duplicated descriptions will be omitted.

[0031] <Overall composition> FIG. 1 is a top view showing a schematic configuration of a biochemical analyzer 1 according to an embodiment. As shown in FIG. 1, the biochemical analyzer 1 includes a sample processing device 2 and an information processing device 3. The sample processing device 2 reacts a sample, such as serum, plasma, or urine, with a reagent to obtain a reaction liquid, and measures the absorbance of the reaction liquid. The information processing device 3 determines the amount of a component of the sample, such as cholesterol, based on the absorbance measured by the sample processing device 2. That is, the biochemical analyzer 1 analyzes the sample by colorimetric analysis. Such a biochemical analyzer 1 is used, for example, to test various test items, such as cholesterol levels, of a sample. The biochemical analyzer 1 is an example of an analysis device.

[0032] The information processing device 3 includes a control unit, a storage unit, a display unit, and an operation unit (none of which are shown in the figures). The control unit includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The information processing device 3 is communicatively connected to the sample processing device 2. The information processing device 3 may be configured, for example, by a personal computer.

[0033] The sample processing device 2 includes a housing 10, a sample storage 11, a reagent storage 12, a reaction tank 13, a sample dispensing section 14, reagent dispensing sections 15, 16, agitators 17, 18, a measurement section 19, a cleaning section 20, a control section 21, a dispensing device 50, and a liquid heating device 100.

[0034] The sample repository 11 has a rotating body 31 that is substantially circular in plan view. The rotating body 31 is supported by the housing 10 so as to be rotatable about a rotation center axis O1 along the up-down direction of the housing 10 (height direction of the housing 10). The rotating body 31 is rotated about the rotation center axis O1 by a driving mechanism (not shown). The rotating body 31 can hold a plurality of sample containers 32. The plurality of sample containers 32 are arranged around the rotation center axis O1 and set on the rotating body 31, and rotate integrally with the rotating body 31. Note that FIG. 1 shows some of the plurality of sample containers 32. The sample repository 11 may also have a plurality of rotation support parts that can rotate independently of each other about the rotation center axis O1.

[0035] The specimen container 32 contains a specimen. A barcode (not shown) indicating identification information of the specimen container 32 is attached to the specimen container 32. The barcode is read by a barcode reader (not shown) provided in the specimen repository 11 at a position facing the specimen container 32.

[0036] The reagent storage 12 has a rotating body 33 that is substantially circular in plan view. The rotating body 33 is supported by the housing 10 so as to be rotatable about a rotation central axis O2 along the up-down direction of the housing 10. The rotating body 33 is rotated about the rotation central axis O2 by a drive mechanism (not shown). The rotating body 33 can hold a plurality of reagent containers 34. The plurality of reagent containers 34 are arranged around the rotation central axis O2 and set on the rotating body 33, and rotate integrally with the rotating body 33. Note that FIG. 1 shows some of the plurality of reagent containers 34. The reagent storage 12 may also have a plurality of rotation support parts that can rotate independently of each other about the rotation central axis O2.

[0037] The reagent container 34 contains a reagent. A barcode (not shown) indicating identification information of the reagent container 34 is attached to the reagent container 34, and the barcode is read by a barcode reader (not shown) provided in the reagent storage 12 at a position facing the reagent container 34.

[0038] The reaction vessel 13 has a rotor 35 that is substantially circular in plan view. The rotor 35 is supported by the housing 10 so as to be rotatable around a central axis O3 of rotation along the vertical direction of the housing 10. The rotor 35 is rotated around the central axis O3 of rotation by a drive mechanism (not shown). The rotor 35 is provided with a plurality of reaction vessels 36 that are optically transparent. The reaction vessels 36 are arranged around the central axis O3 of rotation and rotate together with the rotor 35. Note that FIG. 1 shows some of the reaction vessels 36. The reaction vessels 36 may be formed of, for example, cuvettes. A specimen and a reagent are dispensed into the reaction vessel 36. The specimen and the reagent react in the reaction vessel 36 to form a reaction liquid. The temperature inside the reaction vessel 13 is kept at a temperature suitable for promoting the reaction between the specimen and the reagent.

[0039] The specimen dispensing unit 14 has a pipette 37 and a drive mechanism 38. The pipette 37 is rotated by the drive mechanism 38 around a rotation center axis Ax4 along the vertical direction of the housing 10 between a position above the specimen storage 11 (above in the height direction of the housing 10) and a position above the reaction tank 13 (above in the height direction of the housing 10). The pipette 37 is also moved along the vertical direction of the housing 10 by the drive mechanism 38. A dispensing device 50 that performs a sample aspirating operation and a sample dispensing operation is connected to the pipette 37. The specimen dispensing unit 14 can aspirate the specimen in the specimen container 32 by the pipette 37 inserted into the specimen container 32, and then insert the pipette 37 into the reaction container 36 and discharge (dispense) the specimen from the pipette 37 into the reaction container 36.

[0040] The reagent dispensing units 15 and 16 each have a pipette 39 or 40 and a driving mechanism 41 or 42. The pipettes 39 and 40 are rotated by the driving mechanisms 41 and 42 around rotation central axes Ax5 and Ax6 along the vertical direction of the housing 10 between a position above the reagent storage 12 (upper in the height direction of the housing 10) and a position above the reaction tank 13 (upper in the height direction of the housing 10). The pipettes 39 and 40 are also moved along the vertical direction of the housing 10 by the driving mechanisms 41 and 42. A dispensing device 50 that performs an aspirating operation and an ejecting operation of the reagent is connected to the pipettes 39 and 40, respectively. The reagent dispensing units 15, 16 can respectively aspirate the reagent in the reagent container 34 using a pipette 39, 40 inserted into the reagent container 34, and then insert the pipette 39, 40 into the reaction container 36 and eject (dispense) the reagent from the pipette 39, 40 into the reaction container 36.

[0041] The measurement unit 19 has a light source unit 45 and a light receiving unit (not shown). The light source unit 45 is positioned outside the reaction tank 13, and irradiates the reaction vessel 36 with light such as halogen light. The light receiving unit receives the light that has passed through the reaction vessel 36, and measures the intensity of the received light. The measurement unit 19 determines the absorbance of the reaction liquid in the reaction vessel 36 based on the intensity of the light measured by the light receiving unit. In addition, the light source unit 45 is configured to be able to switch the wavelength of the emitted light. Thus, the measurement unit 19 can measure the absorbance of multiple types of light having different wavelengths.

[0042] The stirring devices 17 and 18 have a stirring unit (not shown) that can be inserted into the reaction vessel 36. The stirring devices 17 and 18 stir the specimen or reagent dispensed into the reaction vessel 36 by rotating the stirring unit inserted into the reaction vessel 36.

[0043] The washing unit 20 removes (discards) the reaction liquid in the reaction container 36 and washes the inside of the reaction container 36.

[0044] The control unit 21 includes, for example, a CPU, a ROM, and a RAM, and performs various calculations and controls each part of the sample processing device 2.

[0045] A plurality of dispensing devices 50 are provided and connected to the pipettes 37, 39, and 40. The dispensing devices 50 are, for example, built into the driving mechanisms 38, 41, and 42. Note that the dispensing devices 50 may be provided outside the driving mechanisms 38, 41, and 42 within the housing 10.

[0046] In the dispensing device 50, the pipettes 37, 39, and 40 are each connected to a pump (not shown), and pressure for aspirating and discharging in the pipettes 37, 39, and 40 is generated by the reciprocating motion of the pump.

[0047] The liquid heating device 100 heats the cleaning liquid for cleaning the reaction vessel 36 to a certain temperature (e.g., 37°C) and sends the heated cleaning liquid to the cleaning section 20. The cleaning liquid is, for example, a detergent (detergent such as an acidic detergent or an alkaline detergent), a cleaning solution (a cleaning agent such as sodium hypochlorite), or water (pure water, etc.). In the following, the cleaning liquid will be simply referred to as the liquid. This makes it possible to reduce a drop in the temperature of the reaction vessel 36 when cleaning the reaction vessel 36 with the liquid. As a result, a drop in the temperature of the reaction liquid dispensed into the reaction vessel 36 can be prevented, and the measurement results can be stabilized.

[0048] Next, the configuration of the liquid heating device 100 will be described in detail with reference to Figures 2 to 5. Figure 2 is a perspective view of the liquid heating device 100. Figure 3 is an exploded perspective view of the liquid heating device 100. Figure 4 is a cross-sectional view of the liquid heating device 100. Figure 5 is an end view of the liquid heating device 100.

[0049] 2 to 5, the liquid heating device 100 includes a heater 101, a main body 102, a flow path member 103, a heat conductive member 104, a cover member 105, and a temperature sensor 106. Note that the heater 101, the flow path member 103, the cover member 105, and the temperature sensor 106 are omitted from illustration in FIGS. 2 and 3.

[0050] The heater 101 is, for example, a cartridge heater having a structure in which a heating element, in which a nichrome wire is wound around the outer periphery of a ceramic cylinder, is housed in a metal pipe. As shown in FIG. 5, the heater 101 is inserted into a hole formed in the center of one end face of the main body 102 along the longitudinal direction. The heater 101 can be fixed to the hole by mechanical means such as caulking, set screws, or fixing to the main body 102 via a flange provided on the heater 101, or by adhesive. The insertion length of the heater 101 into the main body 102 is appropriately set depending on the heat capacity of the main body 102 and the performance of the heater 101. A thermal diffusion compound or the like may be interposed between the heater 101 and the hole to improve thermal conductivity.

[0051] The main body 102 is made of, for example, a columnar (for example, cylindrical) metal member incorporating the heater 101. The main body 102 is heated by the heater 101. The metal of the main body 102 is a material having high thermal conductivity, such as aluminum, an aluminum alloy, copper, or a copper alloy. In addition, a groove 102a extending, for example, spirally along the axial direction is formed on the outer peripheral surface 102b of the main body 102. Specifically, the groove 102a has a U-shaped or semicircular cross-sectional shape so that the flow path member 103 is in close contact with the bottom of the groove 102a. In addition, it is preferable that the depth of the groove 102a is set to a size such that a part of the flow path member 103 slightly protrudes from the outer peripheral surface 102b of the main body 102 so that the flow path member 103 is pressed toward the bottom of the groove 102a when the heat conductive member 104 is attached. In addition, a plurality of grooves 102a are formed so that a plurality of flow path members 103 can be arranged. The pitch between adjacent grooves 102a is appropriately set depending on the size of main body 102, the flow rate of the liquid flowing through flow path member 103, and the like.

[0052] The flow path member 103 is a tube disposed in the groove 102a of the main body 102, through which the liquid flows, and is made of a material having excellent heat resistance and chemical resistance, such as a fluororesin such as Teflon (registered trademark) or a rubber material such as silicone rubber. The flow path member 103 is configured such that the liquid is supplied from an inlet drawn out from one end side (heater 101 side) of the main body 102, and is discharged from an outlet drawn out from the other end side (temperature sensor 106 side). The liquid is heated to a target temperature by the main body 102 (heater 101) while flowing from the inlet to the outlet of the flow path member 103, and is supplied to the cleaning unit 20 from the outlet.

[0053] The heat conducting member 104 is a cylindrical metal member that covers the outer peripheral surface 102b of the main body 102 and the flow path member 103. For example, a metal material having a relatively small heat capacity, such as iron or copper, is used as the metal of the heat conducting member 104. That is, the heat conducting member 104 is disposed so as to sandwich the flow path member 103 between the main body 102 and the heat conducting member 104. As a result, the heat conducting member 104 is heated by the heat of the main body 102, and the heat retention effect of the space between the main body 102 and the heat conducting member 104 can be improved. As a result, the liquid flowing through the flow path member 103 is kept warm and heat is less likely to escape, so that a decrease in the temperature of the liquid can be suppressed. That is, according to the heat conducting member 104 according to the embodiment, the liquid can be efficiently heated.

[0054] Moreover, the heat conduction member 104 is fixed in a state in which the flow path member 103 is pressed against the bottom of the groove 102a. Specifically, as shown in FIG. 4, the heat conduction member 104 presses the flow path member 103 in a state in which the heat conduction member 104 is slightly spaced from the outer peripheral surface 102b of the main body 102 because the flow path member 103 is disposed to slightly protrude from the groove 102a of the main body 102. Furthermore, the heat conduction member 104 is fixed by the cover member 105. Specifically, the heat conduction member 104 is fixed to the main body 102 in a state in which the cover member 105, which is a heat contraction member, is thermally contracted. In this way, the heat conduction member 104 fixes the flow path member 103 in a state in which the flow path member 103 is pressed against the bottom of the groove 102a, so that the flow path member 103 can be closely attached to the bottom of the groove 102a, and therefore heat exchange between the main body 102 and the flow path member 103 can be efficiently performed. In addition, by pressing the flow path member 103 with the heat conduction member 104, the gap between the heat conduction member 104 and the outer peripheral surface 102b of the main body portion 102 can be minimized, thereby enhancing the heat retention effect provided by the heat conduction member 104 and the main body portion 102.

[0055] As shown in Figs. 2 and 3, the heat conduction member 104 is a divided member divided into two along the axial direction. In Fig. 2, one of the two members into which the heat conduction member 104 is divided is omitted. Specifically, the heat conduction member 104 is cylindrical and divided so that the circumference of the outer circumferential surface in a cross-sectional view is 1 / 2. The method of dividing the heat conduction member 104 is not limited to the case where the circumference of the outer circumferential surface is divided into 1 / 2, that is, exactly in half, but may be such that the circumference of any of the members is longer than 1 / 2. In addition, the number of divisions of the heat conduction member 104 is not limited to two, and may be divided into three or more.

[0056] In this way, by configuring the thermally conductive member 104 as a divided member, the work of mounting the thermally conductive member 104 on the main body 102 can be simplified. Furthermore, when mounting the thermally conductive member 104 on the main body 102, the two divided members may be temporarily fixed with a heat-resistant tape or the like. This makes it possible to prevent the position of the thermally conductive member 104 from shifting when the cover member 105 described below is fixed to the main body 102 by thermal contraction.

[0057] Moreover, the heat conduction member 104 has a smaller heat capacity than the cover member 105 described below. In other words, the heat conduction member 104 heats up and cools down more easily than the cover member 105. This promotes heat exchange between the heat conduction member 104 and the flow path member 103 more than the cover member 105. Therefore, the liquid flowing through the flow path member 103 can be heated efficiently.

[0058] Moreover, the heat conductive member 104 has a smaller heat capacity than the main body 102. In other words, the heat conductive member 104 can quickly absorb the heat of the main body 102 and conduct the heat to the flow path member 103, so that the liquid flowing through the flow path member 103 can be efficiently heated.

[0059] The cover member 105 covers the heat conductive member 104 and is made of an elastic member having a lower thermal conductivity than the heat conductive member 104. The elastic member constituting the cover member 105 is desirably a material having heat resistance and low thermal conductivity, such as a heat shrink tube made of a flexible material or a rubber composition. Specifically, a heat shrink tube made of a flexible material such as polyolefin, a fluorine-based polymer, a thermoplastic elastomer, or silicone rubber, a rubber composition made of natural rubber and styrene butadiene rubber or silicone rubber, or a heat insulating material made of a foamed plastic such as urethane foam, polyethylene foam, or polystyrene foam is desirably used.

[0060] The temperature sensor 106 is disposed on the end face of the other end side (heater 101 side) of the main body 102, and measures the temperature of the main body 102. The temperature sensor 106 may be a resistance temperature detector, a thermocouple, or a thermistor.

[0061] The liquid heating device 100 controls the flow rate of the liquid and the power supplied to the heater 101 so that the measurement value of the temperature sensor 106 becomes a preset target temperature.

[0062] Furthermore, in addition to the temperature sensor 106, the liquid heating device 100 may be provided with a fuse (not shown) in the heat conductive member 104 for cutting off the power supply to the heater 101. Specifically, the fuse is provided on the outer circumferential surface or inner circumferential surface of the heat conductive member 104, and cuts off the power supply to the heater 101 when the temperature of the heat conductive member 104 reaches or exceeds a threshold value. In other words, when the heat conductive member 104 becomes too hot and the temperature of the liquid reaches or exceeds a certain value, the heater 101 is forcibly stopped. This makes it possible to prevent the temperature of the liquid from becoming too high with high precision.

[0063] In the above description, the heat conductive member 104 is made of a single (single layer) metal member, but the heat conductive member 104 may be made of a plurality of different metal members. This will be described with reference to FIG. 6.

[0064] Fig. 6 is a diagram showing another example of the configuration of the heat conductive member 104. As shown in Fig. 6, the heat conductive member 104 is composed of two layers, a first metal part 104a arranged on the inner periphery side and a second metal part 104b arranged on the outer periphery side. For example, the first metal part 104a is made of iron, and the second metal part 104b is made of aluminum. In other words, the second metal part 104b is made of a metal material having a larger heat capacity than the first metal part 104a.

[0065] As a result, the first metal portion 104a on the inner periphery promotes heat exchange with the flow path member 103, and the second metal portion 104b on the outer periphery makes it difficult for the heat of the first metal portion 104a to escape to the outside. In other words, the liquid can be heated efficiently.

[0066] As described above, according to one embodiment of the present disclosure, the liquid heating device 100 includes a heater 101, a main body 102, a flow path member 103, a heat conductive member 104, and a cover member 105. The main body 102 is a main body heated by the heater 101, and has a groove 102a extending along the axial direction on an outer circumferential surface 102b. The flow path member 103 is disposed in the groove 102a and is tubular to allow liquid to flow. The heat conductive member 104 is made of a metal member that covers the outer circumferential surface 102b and the flow path member 103. The cover member 105 covers the heat conductive member 104 and is made of an elastic member having a lower thermal conductivity than the heat conductive member 104. This allows the liquid to be heated efficiently.

[0067] In the above embodiment, the analyzer is described as a biochemical analyzer, but the configuration of the present disclosure is not limited to this and can be applied to other types of analyzers, such as an immunological analyzer.

[0068] In the above embodiment, the heat conducting member 104 is a divided member divided along the axial direction, but it may be a member having slits formed along the axial direction as shown in Fig. 7. Fig. 7 is a cross-sectional view showing another example of the configuration of the heat conducting member 104. Fig. 7 shows a cross section of the heat conducting member 104 and the main body 102 (indicated by a broken line).

[0069] As shown in Fig. 7, the heat conducting member 104 has a slit 104c provided from one end to the other end along the axial direction. In other words, the heat conducting member 104 shown in Fig. 7 is composed of a single member, not a divided member as shown in the above embodiment. In this configuration, when the heat conducting member 104 is attached to the main body 102, both ends of the slit 104c bend in the direction in which the opening of the slit 104c opens. This allows the main body 102 to be attached by inserting the slit 104c from the outside to the inside.

[0070] Furthermore, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. For example, the technical scope of the present invention includes forms obtained by appropriately combining the above-described embodiments within the scope of the claims. [Explanation of symbols]

[0071] 1 Biochemical analyzer 2. Sample processing equipment 3. Information processing equipment 10. Chassis 11 Sample Storage 12 Reagent Storage 13 Reactor 14 Sample dispensing section 15, 16 Reagent dispensing section 17, 18 Stirring device 19 Measuring part 20 Cleaning section 21 Control section 31 Rotating Body 32 Sample container 33 Rotating Body 34 Reagent containers 35 Rotating Body 36 Reaction vessel 37, 39, 40 Pipettes 38, 41, 42 Drive mechanism 45 Light source section 50 Dispensing device 100 Liquid heating equipment 101 Heater 102 Main body 102a Groove 102b Outer surface 103 Flow path components 104 Thermal Conductive Materials 104a 1st metal part 104b 2nd metal part 105 Cover member 106 Temperature Sensor

Claims

1. A main body portion that is heated by a heater and has a groove formed on an outer circumferential surface thereof extending along an axial direction; A tubular flow path member disposed in the groove and allowing a liquid to flow; a heat conduction member made of a metal member covering the outer circumferential surface and the flow path member; a cover member covering the heat conductive member and made of an elastic member having a lower thermal conductivity than the heat conductive member; A liquid heating device comprising:

2. The heat conductive member is A divided member is divided along the axial direction. The liquid heating device of claim 1 .

3. The heat conductive member is A member having a slit formed along the axial direction. The liquid heating device of claim 1 .

4. The heat conductive member is The flow path member is fixed in a state where it is pressed against the bottom of the groove. The liquid heating device of claim 1 .

5. The cover member is A heat-shrinkable member is used to fix the heat-conducting member in a heat-shrinked state. The liquid heating device of claim 1 .

6. The heat conductive member is The heat capacity is smaller than that of the cover member. The liquid heating device of claim 1 .

7. The heat conductive member is The heat capacity is smaller than that of the main body. The liquid heating device of claim 1 .

8. The heat conductive member is At least includes iron components The liquid heating device of claim 1 .

9. The heat conductive member is The first metal part has a first heat capacity on the inner circumferential side, and the second metal part has a second heat capacity larger than the first heat capacity on the outer circumferential side. The liquid heating device of claim 1 .

10. The heater further includes a fuse that cuts off the power supply to the heater when the temperature of the heat conductive member becomes equal to or higher than a threshold value. The liquid heating device of claim 1 .

11. An analytical device comprising the liquid heating device according to any one of claims 1 to 10.

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