Heating tester and heating test method for heat detectors

Abstract

To provide a heating tester and a heating test method for heat detectors capable of being preferably employed in a heating test to be conducted on a differential type heat detector or a compensation type heat detector including a high-temperature type.SOLUTION: In a heating tester 1 for heat detectors in which a test space where a test is conducted with a heat detector 20 located inside is created, a cooling space 3a to be cooled by cooling means 5a and a heating space 4a to be heated by heating means 5b are created as the test space.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heating tester and a heating test method for heating a heat detector to perform an operation test. [Background technology]

[0002] Heat detectors that are installed in buildings, etc. to detect heat in the event of a fire must undergo periodic operation tests (hereinafter referred to as "heat tests") after installation.

[0003] Conventionally, to conduct heating tests on such heat detectors, a heating tester has been used, in which the heat detector is covered with a cylindrical hood (sometimes only the heat-sensitive part of the heat detector is covered), and the heat detector located inside the hood is heated to activate it.

[0004] Heating testers include a type that uses the heat of reaction of platinum with gasoline as a catalyst as a heat source (hereinafter referred to as "platinum hand warmer type") (see, for example, Non-Patent Document 1), and also a type that uses boiling water (hereinafter referred to as "boiling water type") (see, for example, Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] HK-3 Type Heating Tester (Product Information), [online], Tokyo Disaster Prevention Equipment Maintenance Association, [Searched January 31, 2024], Internet<URL:http: / / www.hosyu-kyokai.or.jp / shikenki.html>

[0006] [Non-patent document 2] FHT-3E Explosion-proof Sensor Heating Tester (Catalog), [online], Fenwal Japan Co., Ltd., [Searched January 31, 2024], Internet<URL:https: / / www.fenwal.co.jp / wp / wp-content / uploads / 2021 / 10 / bobaku_kanchi.pdf> Summary of the Invention [Problem to be solved by the invention]

[0007] Heat detectors are classified into three types based on their operating method: constant temperature heat detectors (which activate when the ambient temperature of the detector rises to a certain temperature), differential heat detectors (which activate when the ambient temperature of the detector rises at a certain rate), and compensated heat detectors that can be operated in both constant and differential modes. While the nominal operating temperature of a typical constant temperature detector is 60-80°C, compensated heat detectors include high-temperature types called compensation rate heat detectors, which have a nominal operating temperature of 100-150°C (hereinafter referred to as "high-temperature compensated heat detectors").

[0008] When conducting a heating test of a heat detector, if a platinum hand warmer type heating tester is used, there is a risk of damage due to excessive heating for all types of heat detectors, whether they are constant temperature, differential, or compensation type. In particular, high temperature compensation type heat detectors are likely to be damaged, whether they are operated as a constant temperature or differential type.

[0009] Therefore, for high-temperature compensated heat detectors, heating tests are sometimes performed using a hot water heating tester to operate the heat detector in a differential mode. However, with a hot water heating tester, hot water must be prepared during testing, which makes the testing process complicated.

[0010] The above-mentioned problems when using a hot water type heating tester also exist when performing a heating test on a compensated type heat detector that is not a differential type or a high-temperature type.

[0011] In view of the above circumstances, an object of the present invention is to provide a heating tester and a heating test method that can be suitably used for heating tests of differential heat detectors and compensated heat detectors including high-temperature types. [Means for solving the problem]

[0012] This invention is a heating tester for heat detectors that forms a test space in which testing is performed with the heat detector located inside, characterized in that the test space is formed with a cooling space that is cooled by a cooling means and a heating space that is heated by a heating means.

[0013] The present invention also provides a heating test method for a heat detector that uses a heating tester, characterized in that it includes a cooling step of cooling the heat detector using a cooling means provided in the heating tester, and a heating step of heating the heat detector cooled by the cooling step using a heating means provided in the heating tester.

[0014] In the heating tester of the present invention, the cooling space and the heating space may be arranged side by side, vertically or horizontally. The cooling means and the heating means may be arranged between the cooling space and the heating space, and may be constituted by Peltier elements having one surface facing the cooling space and functioning as the cooling means, and the other surface facing the heating space and functioning as the heating means. The cooling space and the heating space may be arranged side by side, vertically reversible. [Effects of the Invention]

[0015] In this invention, the heat detector can be cooled before heating during the heating test. Therefore, for both differential and compensated type heat detectors, including high-temperature types, the ambient temperature of the heat detector can be increased at a rate equal to or greater than the activation rate of the differential type without being damaged by excessive heating. In other words, the heat detector can be activated without being damaged by excessive heating.

[0016] Therefore, according to the present invention, it is possible to provide a heating tester and a heating test method that can be suitably used for heating tests of differential heat detectors and compensated heat detectors including high-temperature types. [Brief explanation of the drawings]

[0017] [Figure 1] This shows an example of an embodiment of a heating tester for heat detectors of this invention, and is an explanatory diagram showing a schematic side view of the entire tester together with its internal structure, where (a) shows the state when the heat detector is cooled in the cooling space, and (b) shows the state when the heat detector is heated in the heating space. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an example of an embodiment of a heating tester and a heating test method for a heat detector according to the present invention will be described with reference to the drawings, taking as an example a case where the cooling means and the heating means are Peltier elements.

[0019] [Basic configuration] The heating tester 1 comprises a tester body 2, a first hood 3 and a second hood 4, both of which are attached to the tester body 2 and cover the heat detector 20 during the heating test, forming a test space in which the test is carried out with the heat detector 20 located inside, a U-shaped bracket 6 attached to the tester body 2 and supporting the tester body 2 by a support part 6a so that the tester body 2 can rotate around a horizontal axis, and a support rod 7 attached to the bracket 6 and supporting the tester body 2 (see Figures 1(a) and (b)).

[0020] [First hood, second hood] The first hood 3 and the second hood 4 are both cylindrical and are provided at the top and bottom of the tester body 2 with their top and bottom ends open (openings 3b, 4b). They are also provided so that they can rotate around a horizontal axis together with the tester body 2 and be turned upside down (see Figures 1(a) and (b)).

[0021] In the illustrated example, the first hood 3 and the second hood 4 entirely cover the smoke detector 20, with the smoke detector 20 being entirely located inside, but as long as they cover at least the heat-sensitive portion of the heat detector 20 and the heat-sensitive portion is located inside, they may only partially cover the heat detector 20. Specifically, although not shown, for example, in the case where the heat detector 20 is a type in which a thermistor, which is the heat-sensitive portion, is provided on the front surface of the detector, protruding forward together with a surrounding protector, the hoods may only cover the portion protruding forward.

[0022] [cap] A cap 4c that opens and closes the opening 4b is provided on the second hood 4. The cap 4c has the function of closing the opening 4b to close the heating space 4a.

[0023] [Cooling space, heating space] Inside the first hood 3 and the second hood 4, a cooling space 3a is formed as the test space, which is cooled by a cooling means described later, and inside the second hood 4, a heating space 4a is formed as the test space, which is heated by a heating means described later (see Figures 1(a) and (b)).

[0024] Here, the heating tester 1 has a cooling space 3a and a heating space 4a as test spaces for the heating test, so that during the heating test, the heat detector 20 can be cooled in the cooling space 3a and then heated in the heating space 4a. Therefore, whether the heat detector 20 is a differential type or a compensated type including a high-temperature type, the ambient temperature can be increased at a rate equal to or greater than the activation rate of a differential type without being damaged by excessive heating. In other words, the heat detector 20 can be activated without being damaged by excessive heating.

[0025] [Invert function] The cooling space 3a and the heating space 4a are formed inside the first hood 3 and the second hood 4, which can be reversed up and down, and can be reversed up and down together with the first hood 3 and the second hood 4 (see Figures 1(a) and (b)). During a heating test, as will be explained later, the heating tester 1 is capable of cooling and then heating the heat detector 20, and by having the function of reversing the cooling space 3a and the heating space 4a, it is possible to easily change from the cooling state to the heating state.

[0026] [Cooling means, heating means] The heating tester 1 further includes a cooling unit 5a, which is an example of a cooling means for cooling the cooling space 3a, and a heating unit 5b, which is an example of a heating means for heating the heating space 4a. The cooling unit 5a and the heating unit 5b may be separate devices, or may be integrated into a single device.

[0027] [Peltier element] The illustrated example shows a case where both are integrated into a heating and cooling device 5. More specifically, it shows a case where the heating and cooling device 5 is configured by a Peltier element, one surface of which functions as a cooling section 5a and the other surface of which functions as a heating section 5b.

[0028] The heating and cooling device 5 is disposed on the testing device body 2 so that the cooling section 5a faces the cooling space 3a and the heating section 5b faces the heating space 4a, and is vertically reversible together with the cooling space 3a and the heating space 4a (see FIGS. 1(a) and 1(b)). In other words, even when the device is vertically reversed, the cooling section 5a cools the cooling space 3a and the heating section 5b heats the heating space 4a.

[0029] The heating and cooling means in the heating and cooling device 5 is not limited to a Peltier element, and other means may be used.

[0030] [Battery power supply, etc.] Electrical components such as a battery power source for driving the heating tester 1 are not shown, but may be provided in the tester body 2, for example.

[0031] [Test method] The heating tester 1 has a cooling space 3a and a heating space 4a as test spaces for the heating test, so that, as described above, during the heating test, the heat detector 20 can be cooled by the cooling space 3a and then heated by the heating space 4a.

[0032] A specific procedure for carrying out a heating test using the heating tester 1 can be, for example, as follows.

[0033] Cooling step First, with the first hood 3 in the upper position, the worker covers the heat detector 20 with the first hood 3 and attaches the opening 3b to an installation surface such as the ceiling surface T to close the cooling space 3a, and then drives the heating and cooling device 5 to cool the heat detector 20 in the cooling space 3a (see Figure 1(a)).

[0034] Heating step Next, the heat detector 20 is cooled in the cooling space 3a for a predetermined time, and then the first hood 3 and the second hood 4 are inverted upside down so that the second hood 4 is positioned on top. In this state, the second hood 4 covers the heat detector 20, and the opening 4b is attached to an installation surface such as the ceiling surface T, closing the heating space 4a and heating the heat detector 20 in the heating space 4a (see FIG. 1(b)). Then, it is confirmed whether the heat detector 20 is activated within the predetermined time.

[0035] When performing the cooling step, it is preferable to keep the heating space 4a closed with the cap 4c (see FIG. 1(a)). This allows the heating space 4a to be heated in a closed state while the cooling step is being performed. When performing the heating step, the cap 4c must be removed (see FIG. 1(b)), but heating of the heat detector 20 inside the heating space 4a can be started from a preheated state.

[0036] [Configuration change example] An example of an embodiment of the heating tester and heating test method of the present invention has been described above with reference to the drawings, but the present invention is not limited to the above embodiment, and modifications to the configuration are possible within the scope of the gist of the invention.

[0037] For example, the first hood 3 and the second hood 4 may be arranged side by side, instead of being arranged vertically. That is, the cooling space 3a and the heating space 4a may be arranged side by side, instead of being arranged vertically. During a heating test, when changing the state in which the heat detector 20 is located in the cooling space 3a to the state in which it is located in the heating space 4a, it is necessary to move the first hood 3 and the second hood 4 side by side, but it is not necessary to move them upside down.

[0038] In this case, the heating and cooling device 5 can be installed between the cooling space 3a and the heating space 4a which are arranged side by side, and as described above, the cooling section 5a can face the cooling space 3a and the heating section 5b can face the heating space 4a. [Explanation of symbols]

[0039] 1: Heating tester 2: Tester body 3: First hood 3a: Cooling space 3b: Opening 4: Second hood 4a: Heating space 4b: Opening 4c: Cap 5: Heating and cooling device 5a: Cooling section 5b: Heating section 6: Bracket 6a: Axial support 7: Support rod

Claims

1. A heating tester for a heat detector, which forms a test space in which a test is performed with a heat detector located therein, A heating tester for a heat detector, characterized in that the test space is formed of a cooling space cooled by a cooling means and a heating space heated by a heating means.

2. 2. The heating tester according to claim 1, wherein the cooling space and the heating space are formed side by side, one above the other or one to the left and one to the right.

3. 3. The heating tester according to claim 2, wherein the cooling means and the heating means are provided between the cooling space and the heating space, and are constituted by Peltier elements having one surface facing the cooling space and functioning as the cooling means, and the other surface facing the heating space and functioning as the heating means.

4. 2. The heating tester according to claim 1, wherein the cooling space and the heating space are formed vertically side by side and are reversible.

5. A heating test method for a heat detector using a heating tester, a cooling step of cooling the heat detector by a cooling means provided in the heating tester; a heating step of heating the heat detector cooled by the cooling step using a heating means provided in the heating tester.

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