JP3402885B2 - Heat exchanger sensor mounting - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting tool for mounting a sensor for detecting temperature or humidity on a heat exchanger provided in an air conditioner or the like.

[0002]

2. Description of the Related Art Conventionally, an indoor unit of this type of air conditioner is provided with a heat exchanger on the use side, and a temperature sensor and a humidity sensor are attached to the front surface of the heat exchanger by a fixture. .

In this case, the heat exchanger is composed of a plurality of heat exchange fins provided between the tube plates and pipes penetrating the heat exchange fins, and the fixture has a thickness that can be inserted between the heat exchange fins of the heat exchanger. The insertion part, a base part formed on one side of the insertion part, and a sensor holding part formed on the other side of the insertion part for holding the various sensors on the front surface, the insertion part being a tube plate. The sensor was attached to the heat exchange fin side of the tube sheet by inserting it between the heat exchange fins on the inside of the tube and engaging it with the pipe.

[0004]

In this mounting state, the base portion of the fitting is located on the front side of the tube sheet, but in the past, the inserting portion only engaged with the pipe, so the inserting process Therefore, if the base side is pushed too much, the sensor holding part on the opposite side is largely lifted and separated from the heat exchanger (heat exchange fin). If the sensor holding portion is too far away from the heat exchange fins, there is a disadvantage that it may hit a filter or the like provided on the front side of the heat exchanger.

On the contrary, if the sensor holding portion side is pushed too far, the sensor will come too close to the heat exchange fin (heat exchanger) and the sensor will be immersed in the dew flowing down the heat exchange fin. Therefore, there is a problem that the detection operation is hindered.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and by a simple insertion work,
It is an object of the present invention to provide a sensor mounting tool capable of mounting a sensor at a predetermined position of a heat exchanger.

[0007]

[Means for Solving the Problems] To achieve this object
According to the first aspect of the present invention, there is provided a sensor mounting tool for mounting a sensor on a heat exchanger including a plurality of heat exchange fins provided between tube plates and a pipe penetrating the heat exchange fins. Inserted into the pipe and engaged with the pipe, a base portion formed on one side of the insertion portion and located on the tube sheet side, and formed on the other side of the insertion portion and opposite to the heat exchange fins. Sensor holding part for holding the sensor on the side surface, a projection protruding on the tube plate side surface of the base part, and a protrusion formed on the sensor holding part.
And the eaves part that is inclined downward toward the outside and the heat exchange of this eaves part.
It is formed on the side of the heat exchange fins and is tilted low
It is formed on the slanted upper inclined part and the lower end of the sensor holding part.
And a lower inclined portion that gradually approaches the heat exchange fin side .

According to the present invention, since the projection is provided on the tube plate side surface of the base portion of the fixture, the projection size of the projection is adjusted, and the sensor holding portion of the sensor holding portion is adjusted in a state where the projection is in contact with the tube sheet. By setting the sensor so that it is spaced a certain distance from the heat exchange fins, you can insert the insertion part between the heat exchange fins and bring the protrusions of the base part into contact with the tube sheet. It is possible to prevent the holding portion from rising and to provide the holding portion at a predetermined position.

Therefore, the sensor can be placed at a fixed position by a simple insertion operation, and an accurate detection operation and prevention of interference with other equipment can be realized.

[0010]

Further, the eaves portion can prevent dew flowing down along the heat exchange fins from flowing into the sensor holding portion. Further, since the dew adhered to the fixture on the sensor holding part side can be smoothly guided in the direction of the heat exchange fins by the upper sloped part and the lower sloped part, the occurrence of defective detection operation due to water immersion of the sensor can be eliminated in advance. You will be able to do that.

[0012]

[0013]

[0014] Sensor fixture of the invention of claim 2, claim
In addition to the first aspect of the present invention , inclined surfaces gradually approaching the heat exchange fin side are provided at upper and lower portions of the surface of the insertion portion opposite to the heat exchange fin.

According to the invention of claim 2, the invention of claim 1
In addition to this, since an inclined surface that gradually approaches the heat exchange fin side is provided at the upper part of the surface on the opposite side of the heat exchange fin of the insertion part of the fixture, the filter is inserted from above on the front side of the heat exchanger,
Even when the lower end of the filter comes into contact with the fitting, the inclined surface guides the filter in a direction away from the fitting.
Therefore, the work of inserting the filter can be facilitated.

Further, since the lower surface is also provided with an inclined surface that gradually approaches the heat exchange fin side, it becomes possible to smoothly guide the dew adhered to the insertion portion of the fitting toward the heat exchange fin. It is possible to more effectively prevent the occurrence of a defective detection operation due to water immersion of the sensor.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a partially cutaway perspective view of an indoor unit 1 of an air conditioner as an embodiment to which the present invention is applied, FIG. 2 is a front view of one side of a use side heat exchanger 7, and FIG. 4 is a right side view of the heat exchanger 7, FIG. 5 is a front view of the fixture 17, FIG. 6 is a left side view of the fixture 17, FIG. 7 is a right side view of the fixture 17, and FIG. 8 is a plan view of the fixture 17, FIG.
Shows respective bottom views of the fixture 17.

In each of the drawings, the use side heat exchanger 7 is attached to the left of the front center of a steel plate frame 6 constituting the indoor unit 1. The heat exchanger 7
The electrical component box 2 is vertically attached between the right side surface 6A of the frame 6 and the right side of the electrical box 2.

A cross flow fan 8 is attached to the left and right above the heat exchanger 7, and the fan 8 is rotationally driven by a motor 8M attached to the electrical equipment box 2 side. Further, a cross flow fan 9 is also attached to the left and right behind the lower part of the heat exchanger 7, and this fan 9 is also rotationally driven by a motor 9M attached to the electrical equipment box 2 side.

The heat exchanger 7 includes the left and right tube plates 13, 13
A plurality of heat exchange fins 14 ...
And a refrigerant pipe 11 which is connected to a condensing unit on the outdoor unit side (not shown) and through which a refrigerant flows, and a hot water pipe which is connected to a boiler (not shown) on the outdoor unit side through a variable flow valve 10 and through which hot water flows. 12 and each of the pipes 11 (front side) and 12 (rear side) penetrates the tube sheet 13 and the heat exchange fins 14 ... And is provided in a meandering shape. Further, a temperature sensor 18 and a humidity sensor 19 are attached to the right side of the front side of the heat exchanger 7 by a fixture 17.

The fitting 17 is made of synthetic resin such as high-density polyethylene, and extends vertically and has a predetermined width in the front-rear direction, and the insertion portion 51.
The sensor holding portion 5 extending leftward from the substantially central portion of the
2 and a base portion 53 extending rightward from the substantially central portion of the insertion portion 51.

At the rear edge of the insertion portion 51, a plurality of fitting portions 54, ... Having a predetermined curved shape are formed in the upper and lower portions, and the inner size of each fitting portion 54. The dimensions are such that they can be fitted, and the mutual distance is one of the vertical distances of the pipe 11.
It is set to / 2. Further, an inclined surface 56 whose upper portion gradually recedes is formed at the upper front edge of the insertion portion 51, and an inclined surface 57 whose lower portion gradually recedes is formed at the lower front edge of the insertion portion 51.

At the upper edge of the sensor holding portion 52, an eaves portion 58 is formed which extends forward, and the eaves portion 58 has a shape having a high center and a downward inclination toward the left and right sides.
Further, on the rear side of the eaves portion 58, an upper inclined portion 59 which is inclined rearward low is formed, and at the lower end of the sensor holding portion 52, a lower inclined portion 61 whose lower portion is gradually retracted is formed.

The front upper portion of the sensor holding portion 52 (the eaves portion 5)
On the lower side of (8), a first holding portion 63 having a groove 62 that is open upward and to the left and right is formed, and a base portion 53 corresponding to the right side of the first holding portion 63 extends to the insertion portion 51. One lead wire holding portion 64 is formed. Further, on the lower side of the first holding portion 63, the pressing claws 66 and 67 and the lower holding protrusion 68 are provided.
To 70 and a lateral holding protrusion 71 are formed, and a second lead wire holding portion 73 extending to the insertion portion 51 is formed on the base portion 53 corresponding to the right side thereof. There is.

Further, a projection 74 is formed on the back surface of the base 52 so as to project. The protrusion size of the protrusion 74 is equal to that of the fitting portion 5.
4 ... is fitted into the pipe 11 of the heat exchanger 7 and the projection 74 is brought into contact with the tube sheet 13, the lower end of the lower inclined portion 61 of the sensor holding portion 52 contacts the front edge of the heat exchange fin 14. It is set to a value close to or very close to. Further, the left end of the protrusion 74 is separated from the insertion portion 51.

With the above construction, first, the temperature sensor 18 is engaged with and held by the first holding portion 63, and its lead wire is pulled out to the right and pushed into the first lead wire holding portion 64.
Hold it. Further, the humidity sensor 19 also has a second holding portion 72.
The lead wire is pulled out to the right and pushed into the second lead wire holding portion 73 to be held (FIGS. 2 and 3, each sensor is omitted).

In this way, each sensor 18, 1 is attached to the fixture 17.
With 9 attached, insert the insertion portion 51 of the attachment tool 17 between the heat exchange fins 14 and so that the base portion 53 corresponds to the front side of the tube sheet 13 on the right side of the heat exchanger 7,
The fitting portion 54 ... Is fitted to the pipe 11. And
When the projection 74 is brought into contact with the tube sheet 13, the lower end of the lower inclined portion 61 of the sensor holding portion 52 comes into contact with or is extremely close to the front edge of the heat exchange fin 14 as described above. Each of the sensors 18 and 19 of the holding portion 52 is arranged with a certain distance from the heat exchange fin 14.

That is, the insertion portion 51 is replaced by the heat exchange fins 14 ...
By merely inserting the protrusions 74 of the base portion 53 into contact with the tube sheet 13, the sensor holding portion 52 can be prevented from rising and can be provided at a predetermined position.

On the other hand, the inside of the electrical equipment box 2 is made of hard synthetic resin and is vertically long, and the operation panel 21 is provided at the upper end thereof.
Is attached, a board 22 to which control circuit parts are attached and a board 23 to which circuit parts for power supply are attached are attached below the terminal board 2 for power supply
4 and the terminal board 26 for signals are attached.

A drain pan 27 is provided on the left and right sides of the lower side of the heat exchanger 7. The drain pan 27 has a float switch 2 for detecting full water due to clogging.
The drain hose 29 is connected to the drain pan 27 and is drawn out rearward.

An indoor unit cover 31 is attached to the frame 6 from the front so as to conceal these parts. The heat exchanger 7 is provided at the center of the front surface of the cover 31.
A slit-shaped suction port 32 is formed in front of the heat exchanger 7, and a filter 33 is provided between the suction port 32 and the heat exchanger 7.
Is installed. The filter 33 is held by the cover 31 so that it can be inserted and removed upward.

Vertical air outlets 36 and 37 are formed on the front surface of the upper and lower covers 31 of the suction port 32 so as to extend to the left and right, and a plurality of left and right direction adjusting blades 38 and 39 are rotated at the air outlets 36 and 37, respectively. It is mounted so that it can move freely.
Further, upper and lower flaps 41 and 42 for adjusting the upper and lower blowing directions are attached to the upper and lower outlets 36 and 37, respectively, and these upper and lower flaps 41 and 42 are driven by flap motors 43 and 44 at the right end.

With the above construction, the heat exchanger 7 is operated during the cooling operation.
The pressurized refrigerant is supplied to the refrigerant pipe 11 from the condensing unit of the outdoor unit, and exhibits a cooling effect by the endothermic effect caused by evaporation of the pressurized refrigerant. During this cooling operation, the motors 8M and 9M are operated, and the cool air that has exchanged heat with the heat exchanger 7 is sucked by the fan 8 above the heat exchanger 7 and the fan 9 below, and the indoor air is discharged from the upper outlet 36 and the lower outlet 37. To be blown out.

The operation of the compressor of the condensing unit and the motors 8M and 9M is controlled based on the temperature sensing operation of the temperature sensor 18 (control by the control device on the board 22 or the control device on the outdoor unit side). Maintain the temperature at the set temperature.

Next, during the heating operation, hot water is supplied from the boiler of the outdoor unit to the hot water pipe 12 of the heat exchanger 7 to exert a heating effect. During this heating operation, the motors 8M and 9
M is operated, and the warm air that has exchanged heat with the heat exchanger 7 is sucked by the fan 8 at the upper rear of the heat exchanger 7 and the fan 9 at the lower rear, and is blown into the room from the upper outlet 36 and the lower outlet 37.

The temperature sensor 1 is used to operate the variable flow rate valve 10 for controlling the amount of hot water supplied to the heat exchanger 7 and the motors 8M and 9M.
8 (control by the control device on the board 22 or the control device on the outdoor unit side) based on the temperature-sensitive operation of 8, and thereby,
Maintain the room temperature at the set temperature.

In the dry operation, both the refrigerant and the hot water are supplied to the heat exchanger 7. This dry operation is controlled based on the detection operation of the humidity sensor 19 (control by the control device on the substrate 22 or the control device on the outdoor unit side), thereby maintaining the indoor humidity at the set humidity.

Here, during the cooling operation and the dry operation, a large amount of dew adheres and grows on the heat exchanger 7. These dew flows down and is received by the drain pan 27 below, and is discharged to the outside through the drain hose 29, but the dew also adheres to the fixture 17 or flows down.

However, as described above, the presence of the protrusions 74 forms a constant space between each of the sensors 18 and 19 and the heat exchange fins 14 ..., These are immersed in the dew on the surface of the heat exchange fins 14. It will not be done. Further, the eaves 58 can prevent dew flowing down along the heat exchange fins 14 from flowing into the front surface side of the sensor holding portion 52, and the upper inclined portion 59 and the lower inclined portion 61 can be prevented.
Since the dew adhered to the sensor holding portion 52 can be smoothly guided toward the heat exchange fins 14, the sensors 18, 1
It becomes possible to eliminate the occurrence of the defective detection operation due to the water infiltration 9 in advance.

Further, since the protrusion 74 of the base portion 53 is separated from the insertion portion 51, it is possible to minimize the inconvenience that the protrusion 74 impedes the flow of dew, and the sensors 18 and 19 are flooded. It becomes possible to more effectively prevent malfunction due to the above.

Further, since the inclined surface 56 that gradually approaches the rear heat exchange fin 14 side is provided on the upper portion of the front edge of the insertion portion 51 of the fixture 17, the filter 33 is attached to the front side of the heat exchanger 7 from above. When the filter 33 is inserted and its lower end comes into contact with the fixture 17, the filter 33 is attached to the fixture 17 by the inclined surface 56.
Is guided in a direction away from. Therefore, the insertion work of the filter 33 can be facilitated.

Further, since the inclined surface 57 that gradually approaches the rear side of the heat exchange fin 14 is also provided in the lower portion, the insertion portion 51
It becomes possible to smoothly guide the dew adhered to the direction of the heat exchange fins 14, and it is possible to more effectively prevent the occurrence of a defective detection operation due to the water in the sensors 18 and 19.

Although the present invention is applied to the heat exchanger of the air conditioner in the embodiments, the present invention is not limited to this, and the present invention is also effective to a cooling device such as a refrigerator.

[0044]

As described in detail above, according to the invention of claim 1.
By doing so, since a projection is provided on the tube plate side surface of the base of the fixture, the protrusion size of this projection is adjusted, and the sensor of the sensor holding part acts as a heat exchange fin when the projection is in contact with the tube plate. By setting it so that it is arranged with a certain space, the sensor holder can be prevented from rising only by inserting the insertion part between the heat exchange fins and making the projection on the base contact the tube plate. Then, the sensor can be provided at a predetermined position.

Therefore, the sensor can be arranged at a fixed position by a simple insertion operation, and an accurate detection operation and prevention of interference with other devices can be realized.

Further, the eaves portion can prevent the dew flowing down along the heat exchange fins from flowing into the sensor holding portion. Further, since the dew adhered to the fixture on the side of the sensor holding part can be smoothly guided to the heat exchange fin direction by the upper inclined part and the lower inclined part, occurrence of defective detection operation due to water immersion of the sensor can be eliminated in advance. You will be able to do that.

[0047]

Further , according to the invention of claim 2, claim 1
In addition to the invention described above, an inclined surface that gradually approaches the heat exchange fin side is provided on the upper surface of the insertion portion of the fitting opposite to the heat exchange fin, so that the filter is inserted from above in the front side of the heat exchanger. Even when the lower end of the filter comes into contact with the fitting, the inclined surface guides the filter in a direction away from the fitting. Therefore, the work of inserting the filter can be facilitated.

Further, since an inclined surface gradually approaching the heat exchange fin side is also provided in the lower part, it becomes possible to smoothly guide the dew attached to the insertion portion of the fitting toward the heat exchange fin. It is possible to more effectively prevent the occurrence of a defective detection operation due to water immersion of the sensor.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an indoor unit of an air conditioner as an embodiment to which the present invention is applied.

FIG. 2 is a front view of a side portion of a utilization side heat exchanger.

FIG. 3 is a left side view in vertical section of the heat exchanger.

FIG. 4 is a right side view of the heat exchanger.

FIG. 5 is a front view of the fixture.

FIG. 6 is a left side view of the fixture.

FIG. 7 is a right side view of the fixture.

FIG. 8 is a plan view of the fixture.

FIG. 9 is a bottom view of the fixture.

[Explanation of symbols]

1 Indoor unit 7 User side heat exchanger 11 piping 13 tube sheet 14 heat exchange fins 17 Fixture 18 Temperature sensor 19 Humidity sensor 51 Insert 52 sensor holder 53 base 54 Fitting part 56, 57 slope 58 Eaves 59 Upper slope 61 Lower slope 74 Protrusion

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 58-145865 (JP, A) JP 4-55654 (JP, A) Actual opening 4-95246 (JP, U) Actual opening 59- 170148 (JP, U) Actual opening 63-40749 (JP, U) Actual opening 58-74029 (JP, U) Actual opening Sho 58-25934 (JP, U) Actual opening Sho 57-160646 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25B 49/02 510 B60H 1/32 F28F 9/00

Claims (2)

(57) [Claims] 1. A heat exchanger comprising a plurality of heat exchange fins provided between tube sheets and a pipe penetrating the heat exchange fins, wherein a sensor is attached via an attachment, wherein the attachment is the heat exchange fin. An insertion part that is inserted between the fins and engages with the pipe, a base part that is formed on one side of the insertion part and that is located on the tube sheet side, and that is formed on the other side of the insertion part, A sensor holding portion that holds the sensor on the surface opposite to the exchange fin, a protrusion that is provided on the tube plate side surface of the base portion, and an upper portion of the sensor holding portion that are formed to face outward.
On the heat exchange fin side of this eaves and
The upper sloping part that is formed and is slanted low toward the heat exchange fins
And the heat exchange flap formed on the lower end of the sensor holder.
A sensor fitting for a heat exchanger, comprising: a downward sloping portion that gradually approaches the inner side . 2. A surface of the insertion portion opposite to the heat exchange fin.
Gradually approach the heat exchange fin side to the upper and lower parts of the
The heat according to claim 1, wherein a sloped surface is provided.
Exchanger sensor mount.