JP2017032236A - Indoor temperature sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain sufficient responsiveness while curbing an impact from an outside.SOLUTION: An indoor temperature sensor 1 comprises: a mounting base 2 installed on a wall face W; a cover member 3 which is installed in a manner that covers a front face of the mounting base 2 and has opening sections 26 on upper and lower peripheral wall faces 3a and 3b with the mounting base 2 installed on the wall face W; and a temperature detection element 4 which is made of a thin film and installed on the mounting base 2 in the cover member 3. Lead lines 12a, 12b and 12c extended from a resistive element 11 of the temperature detection element 4 are inserted into protection pipes 16 made of synthetic resin. The protection pipes 16 are fixed at positions with a predetermined distance from a front face of the mounting base 2 through a mounting plate 17 made of the synthetic resin. The resistive element 11 is positioned at a lower section of the mounting base 2 with the mounting base 2 installed on the wall face W.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an indoor temperature sensor that is installed on a wall surface of a room such as a general building air conditioner, a pharmaceutical line, or a clean room and used for room temperature measurement and control.

  For example, in a general building air conditioner, a pharmaceutical line, a clean room, etc., an indoor temperature sensor is installed on an indoor wall surface, room temperature is measured, and air conditioning equipment such as an air conditioner is controlled based on the result of the room temperature measurement.

  Conventionally, as this type of indoor temperature sensor provided by the present applicant, for example, MODEL R030 disclosed in the following non-patent document is known. The one-element type indoor temperature sensor in MODEL R030 has two stainless steel protective tubes arranged in parallel on a main body made of heat-resistant ABS resin, and one of the protective tubes has a built-in resistance element. The terminal is connected by wiring through a heat-resistant vinyl-coated conductive wire. In the two-element type indoor temperature sensor in MODEL R030, one resistive element is built in each of two protective tubes. This indoor temperature sensor of MODEL R030 is used with a main body attached to a wall surface in the room according to the room environment to be measured and controlled.

  According to the indoor temperature sensor of MODEL R030, since the protective tube with a built-in resistance element is exposed from the main body, the resistance element can react sensitively to the temperature change in the room, and it has high accuracy due to excellent responsiveness. There is an advantage that room temperature can be measured.

Gas temperature measurement sensor MODEL R030 (for general indoor use): Specification of MODEL R030

  However, in the above-described indoor temperature sensor of MODEL R030, if an external impact is applied to the protective tube exposed from the main body due to, for example, a child's mischief in a public facility, the resistance element built in the protective tube is destroyed. There was a risk of doing so. In addition, since each terminal of the resistance element is drawn from the main body through a heat-resistant vinyl-coated conductive wire, there is also a problem that the wiring is exposed to the room and looks bad.

  In order to solve the above-described problem of resistance element destruction, a structure in which the resistance element in the indoor temperature sensor of MODEL R030 is covered with a cover is also conceivable. In this case, the resistance element built in the protective tube is further covered with a cover, and the resistance element cannot react sensitively to the temperature change in the room, resulting in a problem that the responsiveness deteriorates.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an indoor temperature sensor that can maintain sufficient responsiveness while suppressing external impact.

In order to achieve the above object, an indoor temperature sensor according to claim 1 of the present invention is mounted on a wall surface so as to cover a surface of the mounting base, and the mounting base is attached to the wall surface. An indoor temperature sensor comprising: a cover member having an opening formed in a peripheral wall surface in a vertical direction in a state of being installed in; and a thin-film temperature detection element provided on the mounting base in the cover member,
The conductive wire drawn out from the resistance element of the temperature detection element is inserted into a protective tube made of synthetic resin, and the protective tube is fixed at a predetermined height position from the surface of the mounting base through an attachment plate made of synthetic resin, The resistance element is disposed at a lower portion of the mounting base in a state where the mounting base is installed on the wall surface.

The indoor temperature sensor according to claim 2 is the indoor temperature sensor according to claim 1,
The temperature sensing element is characterized in that the temperature sensing surface of the resistance element is arranged downward with the mounting base being installed on the wall surface.

The indoor temperature sensor according to claim 3 is the indoor temperature sensor according to claim 1 or 2,
A terminal block for fixing a crimp terminal at the tip end portion of the conducting wire is provided on an upper portion of the mounting base in a state where the mounting base is installed on the wall surface.

The indoor temperature sensor according to claim 4 is the indoor temperature sensor according to any one of claims 1 to 3,
A heat shielding plate is provided on a side of the mounting base that faces the wall surface.

The indoor temperature sensor according to claim 5 is the indoor temperature sensor according to any one of claims 1 to 4,
The mounting base is provided with a protective member having a wiring hole for drawing the wiring from the resistance element to the wall surface side.

  According to the present invention, the temperature sensing element on the mounting base is covered with the cover member, while being separated from the mounting base installed on the wall surface by a predetermined height, the resistance element of the temperature detecting element is disposed at the lower part of the mounting base. Because of this structure, the indoor air flowing in from the opening of the cover member can efficiently touch the resistance element of the temperature detection element, reduce the thermal effect from the wall surface and mounting base, and have sufficient responsiveness while suppressing external impact Can be maintained.

  In addition, if the temperature sensing surface of the resistance element of the temperature detection element is placed downward with the mounting base installed on the wall surface, the indoor air flowing in from the opening of the cover member is replaced with the resistance element of the temperature detection element. The temperature sensitive surface can be efficiently touched and the room temperature can be detected with high accuracy.

  Furthermore, if the terminal block for fixing the crimp terminal at the tip of the conductor is provided on the upper part of the mounting base in a state where the mounting base is installed on the wall surface, the temperature detecting element between the resistance element and the terminal base is provided. It is possible to increase the distance by increasing the length of the conductive wire connecting the two, and to reduce the influence of heat transmitted from the mounting base to the resistance element via the terminal portion and the conductive wire.

  Moreover, if it is set as the structure which provides a heat shielding board in the side facing the wall surface of a mounting base, the radiant heat of a wall surface can be shielded and the influence by wall surface temperature can be reduced.

  Furthermore, if the mounting member is provided with a protective member having a wiring hole for drawing the wiring from the resistance element to the wall surface side, the wiring from the resistance element is not exposed to the room, so that the appearance is good and the inside of the wall surface is The temperature sensing element can be wired efficiently.

It is a figure which shows the external appearance of the indoor temperature sensor which concerns on this invention, Comprising: It is a perspective view of the state installed in the wall surface. (A) It is a top view of the state which removed the cover member from the indoor temperature sensor which concerns on this invention. (B) It is the side view which looked at (a) from the A direction. (A) It is a top view which shows the whole structure of the temperature detection element used for the indoor temperature sensor which concerns on this invention. (B) It is a figure which shows an example of the connection system of the internal conducting wire of the temperature detection element of (a). It is an enlarged view of the part shown with the dashed-dotted line of the temperature detection element of Fig.3 (a), and is a figure which shows the state to which the attachment plate for attaching to an attachment stand was fixed. It is a figure which shows the comparative example of the time-temperature data in the indoor temperature sensor which concerns on this invention, and the conventional indoor temperature sensor.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  The indoor temperature sensor according to the present invention is installed on a wall surface of a room such as a general building air conditioner, a pharmaceutical line, or a clean room to measure room temperature, and controls air conditioning equipment such as an air conditioner based on the result of the room temperature measurement. It is used for.

  The indoor temperature sensor 1 includes a mounting base 2 and a cover member 3, and is roughly configured with a rectangular appearance. The temperature sensor 1 for room temperature includes a temperature detecting element 4 and, as shown in FIG. 1, the mounting base 2 is installed on a wall surface W of a room to be measured and controlled.

  The mounting base 2 is formed in a rectangular plate shape with synthetic resin such as ABS resin. A temperature detecting element 4 is installed on the surface of the mounting base 2, and a cover member 3 is detachably attached so as to cover the temperature detecting element 4.

  The temperature detection element 4 is composed of a resistance temperature detector using a thin-film resistance element 11 in which a platinum film is formed on an insulating substrate such as ceramic, and the surface on which the platinum film of the resistance element 11 is generated is a temperature-sensitive surface. 11a is formed.

  In this example, in consideration of responsiveness and disturbance rejection, in order to remove the influence of the conductor resistance, two conductors are connected to one end of the resistance element 11 and one conductor is connected to the other end, and the connection diagram of FIG. The three-conductor type (JIS type) temperature sensing element 4 shown in FIG. The configuration will be described. As shown in FIGS. 3A and 4, two conductive wires 12 a and 12 b are fixedly connected to one end of the resistance element 11 with solder 13. One conductive wire 12c is fixed to the other end of the resistance element 11 with solder 13 and connected. The two conducting wires 12a and 12b are inserted into a protective tube 14 made of a resin such as polyimide, Teflon (registered trademark), or silicone, for example, and metal crimp terminals 15a and 15b are attached to the tips thereof. Similarly, one conductor 12c is inserted through a protective tube 16 made of a resin such as polyimide, Teflon (registered trademark), or silicone, and a metal crimp terminal 15c is attached to the tip thereof. In addition, since conducting wire 12a, 12b, 12c has heat capacity, it is preferable to use a thing as thin as possible (for example, 0.2 mm diameter).

  For example, the temperature detection element 4 has a protective tube 14 attached to one end of a mounting plate 17 formed of a thin plate (for example, a thickness of 0.1 to 0.2 mm) made of a resin such as polyimide, Teflon (registered trademark), or silicone. 16 is bonded and fixed by an adhesive 18 such as a silicone-based adhesive. The temperature detection element 4 is provided in the lower part of the mounting base 2 in a state where the mounting base 2 is installed on the wall surface W (state shown in FIG. 1) in consideration of natural convection of heat. The temperature detection element 4 has a mounting hole 17a provided on the other end side of the mounting plate 17 so that the temperature-sensitive surface 11a of the resistance element 11 faces downward, as indicated by the slanting line to the right in FIG. A resin screw (fixing screw made of synthetic resin) 19 is inserted into the mounting base 2 from the inside, and the resin screw 19 is tightened to be fixed to the fixing member 2 a of the mounting base 2.

  And the resistance element 11 of the temperature detection element 4 fixed to the mounting base 2 as described above is efficient without obstructing the flow of air from the room flowing in from an opening 26 described later of the cover member 3. Arranged in the flowing position. Specifically, the resistance element 11 of the temperature detection element 4 has an approximate center of the width H1 excluding a portion where a terminal block 20 described later in FIG. 2A is provided, and an approximate center of the thickness H2 in FIG. And fixed in a state of floating in the air from the surface of the mounting base 2. Thereby, the heat from the mounting base 2 can be prevented from being directly transmitted to the temperature detection element 4, and the temperature sensing surface 11 a of the resistance element 11 of the temperature detection element 4 can efficiently come into contact with the air from the room.

  In the state where the mounting base 2 is installed on the wall surface W (FIG. 1), the crimp terminals 15a, 15b, 15c of the three conductors 12a, 12b, 12c of the temperature detecting element 4 are provided on the upper right side of the mounting base 2. A terminal block 20 for fixing is provided. As shown in FIG. 2, the three crimp terminals 15 a, 15 b, 15 c of the temperature detection element 4 are fixed to the terminal block 20 by fastening metal terminal screws 21, respectively.

  Further, on the lower right side of the mounting base 2, three lead wires 12 a, 12 b, 12 c drawn from the resistance element 11 of the temperature detection element 4 through the protective tubes 14, 16 are folded back and guided to the terminal base 20 side. The guide member 22 is provided. As shown in FIG. 2B, the guide member 22 has a resin screw 22c fastened and fixed to the mount 2 via a resin washer 22a and a resin spacer 22b. The resin washer 22a, the resin spacer 22b, and the resin screw 22c are each made of synthetic resin. Then, the three conducting wires 12a, 12b, and 12c drawn from the resistance element 11 of the temperature detecting element 4 are bent toward the terminal block 20 via the resin screw 22c of the guide member 22, and are connected to the crimp terminals 15a and 15b at the tip. , 15c are fastened and wired to an insert fitting (not shown) embedded in the terminal block 20 by the terminal screw 21. Thereby, the length of the conducting wires 12a, 12b, 12c from the resistance element 11 of the temperature detection element 4 to the crimp terminals 15a, 15b, 15c can be earned. As a result, the crimp terminals 15a, 15b, and 15c can be fixed to the terminal block 20 at positions away from the resistance element 11, and the terminal 21, the crimp terminals 15a, 15b, and 15c, and the conductors 12a and 12b can be fixed from the mounting base 2. , 12c, the heat transmitted to the resistance element 11 is suppressed, and the detection error due to the influence of heat can be reduced.

  As shown in FIG. 2, an opening hole 2b is formed in the left half of the mounting base 2, and the heat shield plate 23 is made of resin screws (fixing screws made of synthetic resin) 24 so as to close the opening hole 2b. It is fixed by tightening. The heat shielding plate 23 is made of, for example, a metal such as aluminum, and prevents radiant heat from the wall surface W from being transmitted to the mounting base 2.

  Further, as shown in FIG. 2, a grommet (protective member) 25 having a wiring hole 25 a that penetrates is attached to the center upper portion of the mounting base 2. The grommet 25 pulls out a wiring cable (not shown) connected to the terminal block 20 of the mounting base 2 and guides it into the wall surface W, and wiring when the indoor temperature sensor 1 is wired by pulling out the wiring cable. The cable is protected.

  The cover member 3 is formed of a synthetic resin such as ABS resin, similarly to the mounting base 2, and is attached to the surface side of the mounting base 2 so as to cover the temperature detection element 4. Although not particularly illustrated, the cover member 3 is detachably attached to the mounting base 2 by engagement between the locking pieces and the locking holes. A plurality of slit-shaped openings 26 are formed in the cover member 3. The opening 26 is formed in the upper peripheral wall surface 3a and the lower peripheral wall surface 3b positioned in the vertical direction in a state where the mounting base 2 is installed on the wall surface W in consideration of convection of heat in the room. In the example of FIG. 1, 13 slit-like openings 26 are formed at predetermined intervals on the upper peripheral wall surface 3a and the lower peripheral wall surface 3b, respectively. As a result, indoor air enters from the opening 26 of the lower peripheral wall surface 3b, touches the temperature sensing surface 11a of the resistance element 11 of the temperature detection element 4 provided on the mounting base 2 in the cover member 3, and the upper peripheral wall surface. Exit from the opening 26 in 3a.

  And when measuring room temperature using the indoor temperature sensor 1 comprised as mentioned above, the temperature detection element 4 is fixed to the mounting base 2 via the mounting plate 17 in a suspended state, and the temperature is measured. The cover member 3 is attached so as to cover the front surface side of the mounting base 2 on which the detection element 4 is provided, and the rear surface side of the mounting base 2 is installed on the wall surface W of the room that is the object of room temperature measurement and control (state in FIG. 1). . The temperature signal detected by the indoor temperature sensor 1 is output to a control device (not shown) via a wiring cable. When acquiring the temperature signal from the indoor temperature sensor 1, the control device controls air conditioning equipment such as an air conditioner so that the temperature based on the temperature signal approaches the set temperature.

  Here, in order to verify the responsiveness of the indoor temperature sensor 1 of the present embodiment described above and the conventional one-element type indoor temperature sensor (MODEL R030), the inventors of the present invention use time-temperature data in both. An experiment was conducted according to the following procedure. In addition, “responsiveness” in this example means time required to reach 63.2% of the equilibrium value.

  First, for each of the present indoor temperature sensor and the conventional indoor temperature sensor, the whole jig to which the indoor temperature sensor is attached is placed in a constant temperature bath. Subsequently, the room temperature sensor is placed in a thermostatic bath for about 30 minutes to bring the room temperature sensor into an equilibrium state of 50 ° C. Thereafter, the room temperature sensors are taken out and left in a space under ventilation of 25 ° C. (room temperature: sealed space) and 0.15 m / s, and the temperature value of each room temperature sensor is recorded with a recorder.

  FIG. 5 shows time-temperature data of the indoor temperature sensor of the present embodiment and the conventional one-element type indoor temperature sensor (MODEL R030) obtained by the above-described experiment.

  According to the indoor temperature sensor 1 of the present embodiment, as is apparent from FIG. 5, when a sudden change is made from an environment of 50 ° C. to an environment of 25 ° C. (room temperature), a 63.2% response is 36. A result of less than a second was obtained, and a result showing a time-temperature characteristic equivalent to MODEL R030 excellent in responsiveness was obtained. Thereby, according to the indoor temperature sensor of this Embodiment, while being able to suppress the impact from the outside with the cover member 3 and protecting the temperature detection element 4 attached to the mounting base 2, MODEL R030 and The same excellent responsiveness can be maintained.

  As described above, the indoor temperature sensor 1 according to the present embodiment is separated from the mounting base 2 installed on the wall surface W by a predetermined height, and is positioned below the mounting base 2 so that the resistance element 11 of the temperature detection element 4 is disposed. Since the temperature detection element 4 on the mount 2 is covered with the cover member 3, the indoor air flowing in from the opening 26 of the cover member 3 efficiently contacts the resistance element 11 of the temperature detection element 4, and the wall surface The thermal influence from W and the mounting base 2 can also be reduced, and sufficient responsiveness (responsiveness equivalent to MODEL R030) can be maintained while suppressing external impact.

  Further, since the resistance element 11 of the temperature detection element 4 is arranged so that the temperature-sensitive surface 11a faces downward in a state where the mounting base 2 is installed on the wall surface W, the indoor space that flows in from the opening 26 of the cover member 3 is arranged. Air efficiently touches the temperature sensing surface 11a of the resistance element 11 of the temperature sensing element 4, and the temperature sensing element 4 can detect the room temperature with high accuracy.

  Further, the terminal block 20 for fixing the crimp terminals 15a, 15b, 15c at the tip ends of the conductors 12a, 12b, 12c is provided on the top of the mounting base 2 in a state where the mounting base 2 is installed on the wall surface W. The lengths of the conductive wires 12a, 12b, 12c connecting the resistance element 11 of the temperature detection element 4 and the terminal block 20 can be increased to increase the distance. 21, the influence of the heat transmitted to the resistance element 11 through the conducting wires 12a, 12b, and 12c can be reduced.

  Further, since the heat shielding plate 23 is provided on the side of the mount 2 facing the wall surface W, the radiant heat of the wall surface W can be shielded and the influence of the temperature of the wall surface W can be reduced.

  Further, since the grommet as the protective member 25 having the wiring hole 25a for drawing the wiring from the resistance element 11 to the wall surface W side is provided in the mounting base 2, the wiring from the resistance element 11 is not exposed indoors. The temperature sensing element 4 can be wired using the inside of the wall surface W efficiently.

  In the above-described embodiment, the heat shielding plate 23 is provided on the back surface side of the mounting base 2 facing the wall surface W. However, a heat shielding plate is additionally provided between the mounting base 2 and the wall surface W. With this configuration, the temperature stability further increases.For example, when the room temperature is intentionally raised or lowered in a place where precise room temperature control is required, such as in a test room, the temperature difference from the outside temperature is large, and the indoor temperature sensor is This is particularly effective when the wall surface to be attached is affected, or when the wall surface to which the indoor temperature sensor is attached becomes hot due to direct sunlight in summer.

  In the above-described embodiment, the three-conductor temperature detection element 4 is illustrated and described, but the present invention is not limited to this. The temperature detection element 4 is preferably a three-conductor type or a four-conductor type in consideration of responsiveness and disturbance rejection, but may be a two-conductor type. In the case of adopting the two-conductor type temperature sensing element 4, in order to remove the influence of the conductor resistance, the conductor resistance value is detected in advance, and the measured temperature is corrected based on the detected conductor resistance value. preferable.

  Furthermore, in the above-described embodiment, a plurality of slit-like openings 26 are formed in the cover member 3, but the indoor air passes through the atmosphere in which the temperature detecting element 4 is installed in the cover member 3 to the wall surface. The shape, size, number, pitch, and the like of the openings 26 may be appropriately set according to the indoor environment in which the indoor temperature sensor 1 is installed.

  The best mode of the indoor temperature sensor according to the present invention has been described above, but the present invention is not limited by the description and drawings according to this mode. That is, it is a matter of course that all other forms, examples, operation techniques, and the like made by those skilled in the art based on this form are included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Indoor temperature sensor 2 Mounting base 2a Fixing member 2b Opening hole 3 Cover member 3a Upper peripheral wall surface 3b Lower peripheral wall surface 4 Temperature detection element 11 Resistance element 11a Temperature sensing surface 12a, 12b, 12c Conductor 13 Solder 14, 16 Protective tube 15a , 15b, 15c Crimp terminal 17 Mounting plate 17a Mounting hole 18 Adhesive 19, 24 Resin screw (fixing screw)
20 Terminal Block 21 Terminal Screw 22 Guide Member 22a Resin Washer 22b Resin Spacer 22c Resin Screw 23 Heat Shielding Plate 25 Grommet (Protective Member)
25a Hole for wiring 26 Opening H1 Width H2 Thickness W Wall surface

Claims (5)

A mounting base installed on the wall surface, a cover member attached so as to cover the surface of the mounting base, and an opening formed on the peripheral wall surface in the vertical direction in a state where the mounting base is installed on the wall surface; A temperature sensor for a room provided with a temperature sensing element of a thin film provided on the mounting base in the cover member,
The conductive wire drawn out from the resistance element of the temperature detection element is inserted into a protective tube made of synthetic resin, and the protective tube is fixed at a predetermined height position from the surface of the mounting base through an attachment plate made of synthetic resin, An indoor temperature sensor, wherein the resistance element is disposed at a lower portion of the mounting base in a state where the mounting base is installed on the wall surface. 2. The indoor temperature sensor according to claim 1, wherein the temperature sensing element is arranged with a temperature-sensitive surface of the resistance element facing downward in a state where the mounting base is installed on the wall surface. The terminal block for fixing the crimp terminal of the front-end | tip part of the said conducting wire is provided in the upper part of this mounting base in the state in which the said mounting base was installed in the said wall surface, The Claim 1 or 2 characterized by the above-mentioned. Indoor temperature sensor. The indoor temperature sensor according to any one of claims 1 to 3, wherein a heat shielding plate is provided on a side of the mounting base facing the wall surface. The indoor temperature sensor according to any one of claims 1 to 4, wherein the mounting base is provided with a protective member having a wiring hole for drawing out the wiring from the resistance element to the wall surface side. .

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