JP3326335B2 - Fixed structure of temperature detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detector for detecting the temperature of a liquid such as water flowing through a water supply pipe or a water supply pipe of an oil water heater, and more particularly to a fixing structure of the temperature detector.

[0002]

2. Description of the Related Art FIG. 5 shows a structure for fixing a temperature detector of this type. In FIG. 5, reference numeral 1 denotes a fixed portion provided in a mixing valve or the like through which a liquid such as water or hot water flows. A temperature detector provided with the portion 2A, a reference numeral 3 denotes a plate-shaped fixing bracket, and a reference numeral 4 denotes a fastener such as a screw. The fixing bracket 3 is provided with a notch groove 5 at an intermediate position of one end portion for engaging an upper portion of the flange portion 2A of the temperature detector 2, and a notch groove 5 at an intermediate position of the other end portion. A long slot 6 is provided in the same direction as the opening direction. And
With the upper part of the flange portion 2A of the temperature detector 2 engaged with the notch groove 5 of the fixing member 3, the fixing member 3 is fastened to the fixed portion 1 by the fastening member 4 through the long hole 6. It is a structure to do.

[0003]

In the above-described conventional structure for fixing a temperature detector, the elongated hole 6 is provided in the fixing bracket 3 so that the temperature detector 2 can be inserted into the insertion opening. Even if the position of the mounting hole of the fastener 4 provided in the fixing part 1 is shifted due to a dimensional error, not only can the temperature detector 2 be easily fixed by the fixing bracket 3 but also the temperature detector can be inserted. Even if the temperature sensor is located at another place where the distance between the opening and the mounting hole is slightly different, there is an advantage that the fixing bracket can be used in common, but the fastening force of the fastener 4 is insufficient. If the fastener 4 is slightly loosened, the fixing bracket 3 moves in a direction away from the temperature detector 2 due to an impact during transportation or the like, and the temperature detector shifts from a proper position or comes off. Then, there was a concern that accurate temperature detection could not be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to prevent a positional shift of a fixture with a simple configuration while absorbing dimensional errors and sharing components. I have.

[0005]

According to the first aspect of the present invention, there is provided a temperature control apparatus in which a tip is inserted into an opening provided in a wall of a portion to be fixed, which is in contact with a liquid, and a flange is provided on an outer periphery in the middle. A notch groove for engaging the upper portion of the flange portion of the temperature detector with the detector is provided at an intermediate position of one end, and a notch groove is provided at an intermediate position of the other end in the same direction as the opening direction of the notch groove. In a fixing structure of a temperature detector including a fixing member provided with a long hole and a fastener for fastening the fixing member to the fixed portion through the long hole, the fixed portion has a convex portion. The fixing bracket is provided with an abutting portion for preventing the fixing bracket from moving in a direction away from the temperature detector by abutting on the projection.

According to the second aspect of the present invention, the distal end is inserted into the opening provided in the wall of the fixed portion which comes into contact with the liquid,
A temperature detector provided with a flange on the outer periphery in the middle, and a notch groove for engaging an upper portion of the flange of the temperature detector is provided at an intermediate position of one end, and at a position intermediate of the other end. In the fixing structure of the temperature detector, the fixing device has a fixing member provided with a long hole in the same direction as the opening direction of the notch groove, and a fixing member for fixing the fixing member to the portion to be fixed through the long hole. The fixed portion has a convex portion, and abutting portions for preventing the fixing metal from moving in a direction away from the temperature detector by contacting the convex portion are provided on the fixing metal. Is provided with a reinforcing projection wall integrally at an outer edge portion thereof.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 4 is a configuration diagram of an oil water heater related to the fixing structure of the temperature detector of the present invention. The oil water heater 10 includes a proportional combustion type gun type burner 11, and a heat exchanger heated by the burner 11. N, a water supply by mixing the water from the muffler 12, the air supply blower 13, the water supply pipe 14, the hot water supply pipe 15, and the high-temperature water from the heat exchanger N, which are connected to the heat exchanger N, A mixing valve device 16 that flows through the pipe 15, a flow detection device 17, and the like are housed in an outer case 18. Also,
The heat exchanger N is provided with a water inlet pipe 19 and a hot water pipe 20.

As shown in FIG. 1, the mixing valve device 16 has a water supply side inlet 21 to which a water supply pipe 14 is connected.
A, a water supply side outlet 21B to which the water inlet pipe 19 is connected via the flow rate detecting device 17, a water supply side outlet 21C to which the water supply pipe 15 is connected, and a hot water supply side inlet to which the outlet pipe 20 is connected (not shown). ) And a bypass passage portion (not shown) are integrally formed of a synthetic resin. A large opening 22 connected to the internal passage is provided at a position corresponding to a bypass passage portion (not shown), that is, at a part of the main body 21 located at an intermediate position between the water supply side inlet portion 21A and the water supply side outlet portion 21B. A cover member 24 made of synthetic resin is fitted in the large opening 22 through a first O-ring 23 in a liquid-tight manner.
A temperature detector 25 for detecting the temperature of water supply is attached to the lid member 24. 26 is about 2m thick
m, a boss 28 integrally formed on the main body 21 by four screws 27, 27 arranged at a predetermined interval from each other. , 28.

Next, the fixing structure of the temperature detector 25 will be described in detail. The lower surface of the lid member 24 is
In contact with the water flowing in the inside, an insertion opening 29 having a large diameter at the upper part and a small diameter at the lower part is provided at a substantially central part thereof.
The temperature detector 25 is provided on the outer periphery in the middle in the longitudinal direction.
5A, the flange portion 25A and the tip portion 25B are liquid-tightly inserted into the insertion opening 29 of the lid member 24 via the second O-ring 30, and a temperature detecting element such as a thermistor (FIG. (Not shown) is in contact with the water flowing in the main body 21.

Reference numeral 31 denotes a fixing member made of a stainless steel plate having a thickness of about 1 mm. As shown in FIGS. 1 to 3, the fixing member 31 has a flange 25 of the temperature detector 25.
A right-side open notch groove 32 that engages the upper portion 25C of A is provided at a middle position of the right end, and a length set in the middle position of the left end is set to be longer in the same direction as the opening direction of the notch groove 32. A hole 33 is provided. Also, the fixing bracket 31
The size (depth dimension) of the long hole 33 in the direction orthogonal to the longitudinal direction is large on the side of the notch groove 32 and the long hole 33
It is set small on the side. In this manner, the four screws 2 to which the holding plate 26 is fixed are attached to the outer edge of the fixture 31.
Butting portions 34, 34 are provided to prevent the fixing bracket 31 from moving in the direction away from the temperature detector 25 by abutting against the heads (convex portions) of two screws 27 out of 7, 27. ing. Reference numerals 35, 35 denote upwardly-facing reinforcing projecting walls which are formed by bending the front and rear outer edges of the fixing bracket 31 facing each other.

Reference numeral 36 in FIG. 2 denotes a mounting hole provided at the center of the left end of the holding plate 26. The fixing fitting 31 is fastened to the holding plate 26 through the elongated hole 33 in the mounting hole 36. The screw 37 as a fastening tool to be tightened is tightened.

In the above configuration, first, the distal end portion 25B of the temperature detector 25 is inserted into the insertion opening 29 provided in the lid member 24 via the second O-ring 30. At this time, the temperature detector 25 is inserted into the insertion opening 29 up to the flange 25A provided on the outer periphery in the middle in the longitudinal direction. Next, the notch 32 of the fixture 31 is inserted into the temperature detector 25.
To fix the holding plate 26 to the upper surface of the holding plate 26, and furthermore, abutment portions 34, 34 of the holding member 31 to fix the holding plate 26.
It hits the head of the screw 27 of the book. In that state, screw 3
7 through the elongated hole 33, the mounting hole 3 of the holding plate 26.
6, the fixing bracket 31 is fixed to the holding plate 26.
, And the temperature detector 25 is retained and held by the fixing bracket 31.

According to the fixing structure of the temperature detector of the embodiment described above, the fixing bracket 31 is provided with the cutout groove 3 of the right side opening which engages the upper portion 25C of the flange 25A of the temperature detector 25.
2 is provided at an intermediate position of the right end portion, and an elongated hole 33 set to be long in the same direction as the opening direction of the cutout groove 32 is provided at an intermediate position of the left end portion.
Even if the position of the mounting hole 36 of the screw 37 for fastening the fixing bracket 31 with respect to the insertion opening 29 of 5 is shifted due to a dimensional error, the temperature detector 25 can be easily fixed by the fixing bracket 31 easily. In addition, the fixing bracket 31 can be used in common even if the temperature detector is located at another place where the distance between the insertion opening of the temperature detector and the mounting hole is slightly different.

Further, the holding plate 26 as a fixed portion is
The heads (projections) of the screws 27 project from the holding plate 26 by being fixed to the bosses 28, 28 of the main body 21 of the mixing valve device 16 by the screws 27, 27. Since the butting portions 34, 34 provided on the outer edge of the fixing bracket 31 abut on the (projecting portion), the fixing bracket 31 moves in the direction away from the temperature detector 25 by the screws 27, 27 and the butting portion 34, 34. Therefore, the fixing bracket 31 is
Even if the tightening force is insufficient or the screw 37 is slightly loosened, the notch 32 and the temperature detector 2
Therefore, the temperature detector 25 does not deviate from the proper position or drop out of the insertion opening 29 of the lid member 24.

Further, at the front and rear outer edges of the fixing bracket 31, the upwardly extending reinforcing projections 35, 35 are integrally provided by bending, so that the fixing bracket 31 is formed by the reinforcing projection wall. Since the bending strength is enhanced by being reinforced by 35, 35, deformation such as bending is prevented, and the temperature detector 25 can be more reliably retained and held.

[0016]

According to the temperature detector fixing structure of the present invention, the tip is inserted into the opening provided in the wall of the fixed portion which is in contact with the liquid, and the flange is provided on the outer periphery in the middle. And a notch groove for engaging the upper portion of the flange of the temperature detector is provided at an intermediate position of one end, and a notch groove is provided at an intermediate position of the other end in a long direction in the same direction as the opening direction of the notch groove. In a fixing structure of a temperature detector including a fixing member provided with a hole and a fastening member for fastening the fixing member to the fixed portion via the long hole, the fixed portion has a convex portion, By abutting against this convex portion, the fixing bracket is provided with a contact portion for preventing the fixing bracket from moving in a direction away from the temperature detector, so that dimensional errors can be absorbed and components can be shared. Instead of moving the mounting bracket away from the temperature detector. Since it can be prevented by the convex part of the fixed part and the abutting part of the fixing bracket, displacement of the fixing bracket can be prevented with a simple configuration, and there is a concern that the temperature detector will deviate from the proper position or fall out from the opening of the lid member. Instead, accurate temperature detection can always be performed by the temperature detector.

According to a second aspect of the present invention, there is provided a temperature detector having a temperature detector having a front end inserted into an opening provided in a wall of the fixed portion in contact with the liquid, and a flange provided on an outer periphery in the middle. A notch groove for engaging the upper portion of the flange of the temperature detector is provided at an intermediate position of one end, and a long hole elongated in the same direction as the opening direction of the notch groove is provided at an intermediate position of the other end. In a fixing structure for a temperature detector, comprising: a provided fixing member; and a fastener for fastening the fixing member to a fixed portion via a long hole, the fixed portion has a convex portion, and the convex portion has a convex portion. By abutting on the portion, abutment portion for preventing the fixing bracket from moving in a direction away from the temperature detector is provided on the fixing bracket,
Furthermore, since the reinforcing projection is provided integrally with the outer peripheral portion of the fixing bracket, the bending strength of the fixing bracket can be increased by the reinforcing projection in addition to the effect described in claim 1. Therefore, the fixing bracket is prevented from being deformed, such as being bent, and can be more securely prevented from coming off the temperature detector.

[Brief description of the drawings]

FIG. 1 is a front view of a main part showing an embodiment of a fixing structure of a temperature detector according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the same.

FIG. 3 is a plan view of the fixing bracket alone.

FIG. 4 is a configuration diagram of an oil water heater related to a fixing structure of the temperature detector according to the present invention.

FIG. 5 is an explanatory diagram illustrating a conventional example.

[Explanation of symbols]

 24 Lid member (wall) 25 Temperature detector 25A Flange part of temperature detector 25B Tip part of temperature detector 25C Upper part of temperature detector 26 Holding plate (fixed part) 27 Screw (convex part) 29 Insertion opening ( (Opening) 31 Fixing bracket 32 Notch groove 33 Long hole 34 Butt end 35 Reinforcement protruding wall 37 Screw (fastening tool)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01K 1/14 G01K 13/00-13/02 F24H 9/20

Claims (2)

(57) [Claims] 1. A temperature detector having a distal end inserted into an opening provided in a wall of a fixed part in contact with a liquid, a flange provided on an outer periphery of the temperature detector, and an upper part of the flange of the temperature detector. A notch groove is provided at an intermediate position of one end, and a fixing metal provided with a long hole at the intermediate position of the other end in the same direction as the opening direction of the notch groove, In the fixing structure of the temperature detector, the fixing member has a convex portion, and the fixing portion has a protrusion. A fixing structure of a temperature detector, wherein a fixing part for preventing movement in a direction away from the detector is provided on the fixing bracket. 2. A temperature detector having a tip portion inserted into an opening provided in a wall of the fixed portion in contact with a liquid, a flange portion provided on an outer periphery in the middle, and a portion above the flange portion of the temperature detector. A notch groove is provided at an intermediate position of one end, and a fixing metal provided with a long hole at the intermediate position of the other end in the same direction as the opening direction of the notch groove, In the fixing structure of the temperature detector, the fixing member has a convex portion, and the fixing portion has a protrusion. A fixing structure for a temperature detector, wherein a fixing portion for preventing movement in a direction away from the detector is provided on a fixing member, and a reinforcing projection wall is integrally provided on an outer edge portion of the fixing member. .