JP3186299U - Air temperature stabilizing device and analyzer using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air temperature stabilizing device capable of supplying air having an allowable temperature fluctuation range ΔT _b even if ambient air has a large temperature change gradient ΔT _a .
SOLUTION: A first channel through which air flows from the outside of the analyzer housing 10 into the interior of the analyzer housing 10, and a second channel through which a medium for heat exchange with the air flowing through the first channel flows. The air temperature stabilizing device 1 includes a heat exchanger 30 having a control unit 40 and a control unit 40 that controls the medium, and has a cylindrical shape for guiding air from the outside of the analyzer housing 10 to the first flow path of the heat exchanger 30. A heat radiator 60 having a heat radiation flow path is provided.
[Selection] Figure 1

Description

  The present invention relates to an air temperature stabilization device and an analysis device using the same, and more particularly to an air temperature stabilization device including a heat exchanger that performs heat exchange using air.

  In general, an air temperature stabilizing device is required for measurement in which fluctuations in environmental temperature become a problem. At this time, the performance required for the air temperature stabilizing device also varies depending on the temperature fluctuation range allowable in the type of measurement. For example, if the allowable temperature fluctuation range is within ± 5.0 ° C., it can be handled by a general indoor air conditioner (air temperature stabilizing device), but the allowable temperature fluctuation range is ± 0.5. If it is the precision measurement which will be within 0 degreeC, the precision air conditioner (air temperature stabilization apparatus) for exclusive use of an analyzer will be needed (for example, refer patent document 1). In recent years, a precision air conditioner that can supply air whose temperature fluctuation range is within ± 0.1 ° C. to the analyzer has been developed (not shown for violation of public order and morals).

FIG. 3 is a cross-sectional view showing an example of a schematic configuration of a conventional analyzer with a precision air conditioner. The precision air conditioner-equipped analyzer 101 includes a rectangular parallelepiped-shaped analyzer housing 10, a heat exchanger 30 disposed in the intake section 11 at the rear of the analyzer housing 10, and an analysis disposed in the analyzer housing 10. and a control unit 40 for controlling the apparatus main body 20 and the heat exchanger 30, and a temperature sensor 51 for detecting the environmental temperature T _a of the air around the analyzer housing 10.

The heat exchanger 30 is made of a metal having high thermal conductivity, and includes a first flow path for guiding air from the outside of the analyzer housing 10 to the inside of the analyzer housing 10 and a solvent (thermal energy by electricity or the like). It is formed so that it may contact with the 2nd channel which circulates. Thus, the heat T ₂ of the solvent (heat energy due to electricity) flowing through the second passage, and the heat T _a of air flowing through the first flow path is adapted to metal by conduction heat exchange is performed ing. In addition, as a metal used for the said heat exchanger, a copper alloy, aluminum, etc. are mentioned, for example.

Control unit 40, and the ambient temperature T _a detected by the temperature sensor 51, the set is set using the input device such as a temperature T _{b (eg,} the desired temperature selected from among the 18 ° C. to 30 ° C.) based on, by controlling the temperature T ₂ of the second channel of the heat exchanger 30, the temperature of the air supplied to the internal analyzer housing 10 is adjusted to be the set temperature T _b from the temperature T _a Yes. As a result, the temperature inside the analyzer housing 10 becomes the set temperature (T _b ± 0.1) ° C.

However, such a precision air conditioner with analyzer 101 for sucking air around the analyzer housing 10, the environmental temperature T _a from detection by the temperature sensor 51, the temperature T ₂ of the second flow path and controls, be used at a steep change [Delta] T _a no place in the ambient temperature T _a has a use condition. For example, the conventional analyzer 101 with a precision air conditioner is required to have _a suction temperature change gradient ΔT _a within ± 1.0 ° C./h as a use condition.

JP 2000-283500 A

However, in the indoor environment where there is out of the human, the temperature variation gradient [Delta] T _a to the switching time of such closing or when air conditioner ON / OFF of the door is about 4.0 ° C. / h, precision air conditioner as described above in urging the analyzer 101, the temperature fluctuation range [Delta] T _b is disadvantageously can not be supplied to the analyzer body 20 air is within ± 0.1 ° C. is at that time.

In order to solve the above-mentioned problems, the present inventors have studied a method for supplying the analyzer main body 20 with air having an allowable temperature fluctuation range ΔT _b even if the surrounding air has a large temperature change gradient ΔT _a. Went. Therefore, before the air is sucked into the first flow path of the heat exchanger, in order to moderate the temperature change gradient ΔT _a , the shape ( Shapes processed to increase the surface area, etc.) and dimensions (dimensions with sufficient length along the flow path of the radiator and sufficient cross-sectional area perpendicular to the flow path of the radiator) and materials (aluminum ( A1100) and the like) and a heat radiator set to an appropriate heat capacity depending on the mass. For example, assuming that a 1 kg aluminum radiator is provided in front of the first flow path of the heat exchanger, a radiator having a heat capacity of 904 J / ° C. is arranged as in the following formula (1).
Heat capacity (J / ° C.) = Specific heat of aluminum (A1100) × mass of aluminum = 904 (J / kg · ° C.) × 1 (kg) = 904 (1)

The volume of air having a heat capacity corresponding to such a 1 kg aluminum radiator is 0.76 m ³ as shown in the following equation (2). The air of 0.76 m ³ has a volume of about 60% of the locus 1.27 m ³ drawn when the 2 m × 0.9 m door opens and closes 90 °.
Volume of air (m ³ ) = heat capacity ÷ specific heat of air ÷ air density = 904 (J / kg · ° C.) ÷ 1007 (J / kg · ° C. (300K)) ÷ 1.176 (kg / m ³ (300K)) ) = 0.76 (2)

  That is, the air temperature stabilization device of the present invention includes a first flow path through which air flows from the outside of the analysis apparatus casing to the inside of the analysis apparatus casing, and a medium for performing heat exchange with the air flowing through the first flow path. An air temperature stabilizing device comprising a heat exchanger having a second flow channel that circulates and a control unit that controls the medium, wherein air is supplied from the outside of the analyzer housing to the first flow channel of the heat exchanger. It is characterized by including a radiator having a cylindrical heat radiation channel for guiding.

Here, examples of the “medium that circulates through the second flow path” include thermal energy by a solvent (air or water) or electricity.
According to the air temperature stabilizing device of the present invention, before air is sucked into the first flow path of the heat exchanger, it circulates through the heat radiating flow path processed so as to increase the heat capacity. Thus, when the environmental temperature T _a is changed suddenly low, while the air flows through the heat radiation passage, a radiator of heat is bestowed high temperature air in the air touches the radiator, the temperature change The air having a relaxed gradient ΔT _a ′ is sucked into the first flow path of the heat exchanger. On the other hand, when the environmental temperature T _a is changed abruptly high, while the air flows through the heat dissipation flow path, heat of air touched radiator temperature of the air is lowered as it loses the radiator, the temperature change The air having a relaxed gradient ΔT _a ′ is sucked into the first flow path of the heat exchanger. That is, it is possible to extend the temperature change gradient [Delta] T _a the ambient temperature T _a by the radiator.

As described above, according to the air temperature stabilizing device of the present invention, even if the surrounding air has a large temperature change gradient ΔT _a, it is possible to supply air having an allowable temperature fluctuation range ΔT _b . In addition, since the temperature change gradient ΔT _a ′ of the air supplied to the first flow path of the heat exchanger by the radiator can be made gentle, the precision required for the heat exchanger can be relaxed and low. It can be manufactured at a low cost. Furthermore, the heat radiator does not need to be controlled by a control unit or the like as in a heat exchanger, and only needs to be installed in the intake unit or the like, and has no moving parts, and thus has high durability.

(Means and effects for solving other problems)
In the air temperature stabilizing device of the present invention, a partition in which a plurality of channels are formed may be formed inside the heat dissipation channel.
According to the air temperature stabilizing device of the present invention, before air is sucked into the first flow path of the heat exchanger, it circulates through the heat radiating flow path processed so as to increase the surface area. Therefore, the amount of heat exchange with the radiator is efficiently performed.

In the air temperature stabilizing device of the present invention, the radiator may be attached to the inlet of the first flow path of the heat exchanger.
According to the air temperature stabilizer of the present invention, it can be attached to a conventional one.

And in the analyzer of this invention, you may make it provide the above-mentioned air temperature stabilizer, an analyzer main body, and the analyzer housing | casing in which the said analyzer main body was accommodated in the inside.
Furthermore, in the analyzer of the present invention, the analyzer main body may be a mass spectrometer.

Sectional drawing which shows the schematic structural example of the mass spectrometer with a precision air-conditioner of this invention. The perspective view of the heat radiator shown in FIG. Sectional drawing which shows the schematic structural example of the conventional analyzer with a precision air conditioning machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments described below, and includes various modes without departing from the spirit of the present invention.

FIG. 1 is a cross-sectional view showing an example of a schematic configuration of a mass spectrometer with a precision air conditioner according to an embodiment of the present invention, and FIG. 2 is a perspective view of the radiator shown in FIG. In addition, the same code | symbol is attached | subjected about the same thing as the conventional analyzer 101 with a precision air conditioning machine.
The mass spectrometer 1 with a precision air conditioner includes a rectangular parallelepiped analyzer housing 10, a heat exchanger 30 and a radiator (passive radiator) 60 disposed in the intake section 11 at the rear of the analyzer housing 10, and analysis. and a control unit 40 for controlling disposed in the apparatus housing 10 the analyzer body 20 and a heat exchanger 30, and a temperature sensor 51 for detecting the environmental temperature T _a of the air around the analyzer housing 10.

  The radiator 60 includes a rectangular cylindrical metal outer peripheral wall 61 penetrating in the vertical direction and a plurality of metal rectangular plate bodies (partitions) 62 installed inside the outer peripheral wall 61. The plurality of metal square plate-like bodies 62 are arranged in parallel to each other. As a result, a plurality of heat radiating passages in which air flows in the vertical direction are formed, and the radiator 60 has a predetermined mass and a predetermined surface area. At this time, the heat radiation channel has a sufficient length along the heat radiation channel, and the radiator 60 has a sufficient cross-sectional area perpendicular to the heat radiation channel. In addition, as a metal used for the said outer peripheral wall and the said square plate-shaped object, a thing with low heat conductivity and high specific heat is suitable, for example, a copper alloy, aluminum, etc. are mentioned.

And the lower end part of the heat radiator 60 is attached to the inlet_port | entrance of the 1st flow path of the heat exchanger 30. FIG. That is, the mass spectrometer 1 with a precision air conditioner is configured by attaching the radiator 60 to the conventional analyzer 101 with a precision air conditioner. In addition, what is necessary is just to use a general well-known structure as a structure for attachment.
As a result, the air flows through the inside of the plurality of heat dissipation channels from the outside of the analyzer housing 10 and is then sucked into the first channel of the heat exchanger 30. When the environmental temperature _{T a} is changed to the temperature _(T a -.DELTA.T _a), while the air temperature _(T a -.DELTA.T _a) is flowing in the plurality of heat dissipating channel, the radiator temperature _{T a} The amount of heat of the radiator 60 is imparted to the air touched 60, the temperature of the air rises, and the air whose temperature change gradient ΔT _a ′ is relaxed is sucked into the first flow path. On the other hand, when the environmental temperature _{T a} is changed to the temperature _{(T a} + ΔT _a), while the air temperature _{(T a} + ΔT _a) is flowing in the heat radiation passage, touches the radiator 60 of the temperature _{T a} When the heat quantity of the air is taken away by the radiator 60, the temperature of the air is lowered, and the air whose temperature change gradient ΔT _a ′ is relaxed is sucked into the first flow path. In this case, the heat exchanger 30 is, if it is required to suction temperature variation gradient [Delta] T _a is within ± 1.0 ° C. / h as use conditions, suction temperature variation gradient [Delta] T _a of the heat exchanger 30 is ± An appropriate heat capacity is set according to the shape, dimensions, material, and mass of the radiator 60 so as to be within 1.0 ° C./h.

As described above, according to the mass spectrometer 1 with a precision air conditioner of the present invention, even if there is a large temperature change gradient ΔT _a, it is possible to supply air having an allowable temperature fluctuation range ΔT _b . Further, since the temperature change gradient ΔT _a ′ of the air supplied to the first flow path of the heat exchanger 30 by the radiator 60 can be made gentle, the precision required for the heat exchanger 30 can be eased. And can be manufactured at low cost. Furthermore, the heat radiator 60 does not need to be controlled by the control unit 40 or the like as in the heat exchanger 30, and only needs to be installed in the air intake unit 11 or the like, and has no movable part, and thus has high durability.

<Other embodiments>
(1) In the mass spectrometer 1 with a precision air conditioner described above, the radiator 60 includes a rectangular cylindrical metal outer peripheral wall 61 penetrating in the vertical direction and a plurality of vertical penetrating holes inside the outer peripheral wall 61. Although a configuration having a plurality of metal rectangular plate-like bodies 62 installed so as to be divided into flow paths has been shown, the configuration of the radiator is not limited to this, but a hexagonal cylindrical shape, that is, a honeycomb shape, an outer periphery, etc. A square plate fin may be formed on the wall.

(2) In the mass spectrometer 1 with a precision air conditioner described above, a configuration in which the radiator 60 is attached to the conventional analyzer 101 with a precision air conditioner is shown, but a configuration in which a radiator is incorporated may be employed.

  The present invention can be used for, for example, an air temperature stabilizing device including a heat exchanger that performs heat exchange using air.

1: Mass spectrometer with precision air conditioner 10: Analyzer housing 30: Heat exchanger 40: Control unit 60: Radiator

In general, an air temperature stabilizing device is required for measurement in which fluctuations in environmental temperature become a problem. At this time, the performance required for the air temperature stabilizing device also varies depending on the temperature fluctuation range allowable in the type of measurement. For example, if the allowable temperature fluctuation range is within ± 5.0 ° C., it can be handled by a general indoor air conditioner (air temperature stabilizing device), but the allowable temperature fluctuation range is ± 0.5. If it is the precision measurement which will be within 0 degreeC, the precision air conditioner (air temperature stabilization apparatus) for exclusive use of an analyzer will be needed (for example, refer patent document 1). In recent years, a precision air conditioner that can supply air having a temperature fluctuation range within ± 0.1 ° C. to the analyzer has been developed .

Claims (5)

Heat exchange having a first flow path through which air flows from the outside of the analysis apparatus casing to the inside of the analysis apparatus casing, and a second flow path through which a medium for performing heat exchange with the air flowing through the first flow path And
An air temperature stabilizing device comprising a control unit for controlling the medium,
An air temperature stabilizing device comprising a radiator having a cylindrical heat radiation channel for guiding air from the outside of the analyzer housing to the first channel of the heat exchanger.   The air temperature stabilizing device according to claim 1, wherein a partition in which a plurality of flow paths are formed is formed inside the heat dissipation flow path.   The air temperature stabilizing device according to claim 1 or 2, wherein the radiator is attachable to an inlet of a first flow path of the heat exchanger. The air temperature stabilizing device according to any one of claims 1 to 3,
The analyzer body,
An analysis apparatus comprising: an analysis apparatus housing in which the analysis apparatus main body is housed.   The analyzer according to claim 4, wherein the analyzer main body is a mass spectrometer.

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