JP2018185081A - Warm air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warm air heater capable of appropriately preventing or suppressing, with a simple structure, occurrence of noise due to thermal expansion of a warm air flow passage formation member.SOLUTION: A warm air heater A includes a warm air flow passage formation member 6 having a tabular part 60 for forming a warm air flow passage 5, and a receiving member 4 having a receiving part 42 that an end part 60a of the tabular part 60 contacts or approaches. In the end part 60a and the receiving part 42, first and second inclination surfaces S1, S2 are respectively formed, the inclination surfaces inclining to a direction of facing the tabular part 60 and the warm air flow passage 5 to each other, and face-to-face contacting or oppositely approaching each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a hot air heater such as a fan convector.

The fan convector is configured such that a heat exchanger for heating air using hot water or a fan is housed in a housing and the heated air is blown out from a hot air outlet (for example, Patent Document 1, 2).
In such a fan convector, it is necessary to provide a hot air flow path for guiding the air heated using the heat exchanger to the hot air outlet. On the other hand, the hot air outlet is typically formed in a comparatively large opening size that is, for example, horizontally long. For this reason, the hot air flow path is generally configured by combining a plurality of hot air flow path forming members having a plate-like portion or the like in a duct shape. However, in the case of adopting such means, it is disadvantageous in terms of manufacturing effort and cost to provide each of the plurality of hot air flow path forming members in a completely fixed state. For example, when a means for adhering the hot air flow path forming member to another member using an adhesive is used near the hot air outlet, this protruding state is not externally applied when the adhesive protrudes. There is also a risk of appearing in appearance.
Therefore, conventionally, when the hot air flow path forming member is attached at a predetermined location, among the hot air flow path forming members, the end of the plate-like portion facing the hot air flow path is another member (receiving member). A means of simply abutting without being joined to each other is appropriately employed. According to such a means, it is possible to reduce the labor for assembling the hot air flow path forming member while preventing an unnatural gap between the end portion of the plate-like portion and the receiving member, and manufacturing. Costs can be reduced.

  However, the prior art still has room for improvement as described below.

  That is, when hot air flows through the hot air flow path and the temperature of the plate-like portion of the hot air flow path forming member rises, the plate-like portion expands thermally. However, in the plate-like portion, a temperature difference occurs between the inner surface facing the hot air flow path and the outer surface opposite to this, so the amount of thermal expansion is also different between the inner surface and the outer surface of the plate-like portion. There is a difference. As a result, the plate-like portion basically changes so that the overall dimension becomes longer with warping deformation. Based on this, the end portion of the plate-like portion is strongly pressed against the receiving member and is displaced along the surface of the receiving member (strong rubbing), which is caused by rubbing sound or rubbing. There is a risk that abnormal sounds such as stagnation may occur. It is desirable to prevent this as much as possible.

  As a means for eliminating the above-described problems and making the appearance relatively good, it is conceivable to form a gap between the end of the plate-like portion and the receiving member. However, if the gap is large, it looks bad and a lot of hot air leaks from the gap. Moreover, when the said clearance gap is made small in order to eliminate this, when a plate-shaped part thermally expands, the edge part will contact | abut a receiving member strongly. Therefore, there exists a possibility that the same malfunction as the case where the edge part of a plate-shaped part is made to contact | abut to a receiving member from the beginning may arise.

  On the other hand, Patent Document 2 describes means for reducing the squeaking noise by providing a buffer member between two members that repeat thermal expansion and contraction. However, if such a means is adopted, not only the cost of parts becomes high, but also the trouble of providing a buffer member becomes complicated, which causes disadvantages such as a decrease in productivity and an increase in manufacturing cost.

JP 2017-3211 A JP 2001-263705 A

  The present invention has been conceived under the circumstances described above, and it is possible to appropriately prevent abnormal noise from being generated due to thermal expansion of the hot air flow path forming member with a simple configuration. Alternatively, it is an object of the present invention to provide a hot air heating device that can be suppressed.

  In order to solve the above problems, the present invention takes the following technical means.

  A hot air heating apparatus provided by the present invention includes a hot air flow path forming member having a plate-like part for forming a hot air flow path, and a receiver having a receiving part with which the end of the plate-like part comes into contact or approaches. A warm air heating device, wherein the end portion and the receiving portion are inclined with respect to the facing direction of the plate-like portion and the warm air flow path and are in contact with each other or The first and second inclined surfaces that face each other are formed.

According to such a configuration, the following effects can be obtained.
That is, when hot air flows through the hot air flow path and the plate-like portion of the hot-air flow path forming member thermally expands as the temperature rises, as described above, the hot air flow path of the plate-like portion faces the hot air flow path. A temperature difference is generated between the inner surface side to be performed and an outer surface side opposite to the inner surface side, and a difference in thermal expansion amount is also generated. For this reason, the said plate-shaped part inherently warps and deform | transforms in the facing direction of this plate-shaped part and a warm air flow path. On the other hand, since the first and second inclined surfaces described above are in contact with each other or approaching each other in a state inclined with respect to the facing direction, the first inclined surface is changed during the thermal expansion described above. Without causing the second inclined surface to be rubbed strongly with a large stroke, the second inclined surface is smoothly separated from the second inclined surface (see also the embodiment shown in FIG. 2) or remains in contact with the second inclined surface. (See also the embodiment shown in FIG. 3). Therefore, it is possible to appropriately prevent or suppress the generation of noise such as rubbing noise or squeaking noise caused by rubbing during the thermal expansion of the hot air flow path forming member.
The first and second inclined surfaces are in contact with each other or close to each other at a minute interval at least during normal times when warm air does not flow through the warm air flow path, and make these portions in a good appearance. It is possible. Therefore, for example, the first and second inclined surfaces can be arranged in a place that can be seen from the vicinity of the hot air outlet.
In the present invention, the first and second inclined surfaces are formed on the warm air flow path forming member and the receiving member, but the formation of the first and second inclined surfaces is easy. In the present invention, it is not necessary to use a buffer member as shown in Patent Document 2. Therefore, productivity can be increased and manufacturing costs can be reduced.

  In the present invention, preferably, the first inclined surface is inclined to face the warm air flow path side, and the second inclined surface is inclined to face the outer side of the plate-like portion. And the said edge part of the said plate-shaped part is located in the outward side of the said plate-shaped part rather than the said 2nd inclined surface.

According to such a configuration, when the plate-like portion of the warm air flow path forming member undergoes thermal expansion due to the warm air of the warm air flow path, the first inclined surface is larger than the second inclined surface. The end of the plate-like portion can be smoothly displaced outward from the plate-like portion without being rubbed strongly by the stroke (see also the embodiment shown in FIG. 2). ). Therefore, it is possible to appropriately prevent or suppress the generation of abnormal noise while preventing a large distortion from occurring in the plate-like portion of the hot air flow path forming member.

  In the present invention, preferably, the first inclined surface is inclined so as to face the outer side of the plate-shaped portion, and the second inclined surface is inclined so as to face the hot air flow path side. And the said edge part of the said plate-shaped part is located in the said warm air flow path side rather than the said 2nd inclined surface.

  According to such a configuration, when the plate-like portion of the hot air flow path forming member undergoes thermal expansion due to the warm air of the hot air flow channel, the end portion of the plate-like portion is outside the plate-like portion. The first inclined surface is in strong contact with the second inclined surface in order to displace to the side. However, the first and second inclined surfaces are not rubbed strongly with a large stroke (see also the embodiment shown in FIG. 3). Therefore, it is possible to appropriately prevent or suppress the generation of abnormal noise while preventing a gap from being generated between the first and second inclined surfaces during thermal expansion of the plate-like portion.

  In the present invention, preferably, a duct portion that forms the hot air flow path is provided inside, and the duct portion has a left and right side so that a hot air outlet at the end of the hot air flow path has a substantially horizontally long rectangular shape when viewed from the front. It has at least 1 plate-shaped part extended in the width direction, and this plate-shaped part is the said plate-shaped part of the said warm air flow path formation member.

According to such a configuration, the following effects can be obtained.
That is, the plate-like portion extending in the lateral width direction that constitutes the duct portion has a large expansion amount during thermal expansion and a large degree of deformation. Therefore, inherently, when the plate-like portion described above is used, abnormal noise is likely to occur during thermal expansion. However, if the plate-like portion described above is a plate-like portion of the hot air flow path forming member intended by the present invention, it is possible to make it difficult for abnormal noise to occur during thermal expansion.

  In the present invention, preferably, at least one of the first and second inclined surfaces is covered with a highly slidable sheet having a surface friction coefficient smaller than that of the inclined surface.

  According to such a configuration, since the first and second inclined surfaces are suppressed from rubbing strongly, it is possible to further enhance the effect of preventing abnormal noise generation. In the present invention, although it is possible to obtain the effect of preventing abnormal noise generation without providing the above-described highly slidable sheet, the configuration as described above may be adopted. In addition, compared with the buffer member described in Patent Document 2, the highly slidable sheet is inexpensive and easy to install.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is a perspective view of the fan convector which is an example of the warm air heating device concerning the present invention. (A) is IIa-IIa schematic sectional drawing of FIG. 1, (b) is IIb-IIb principal part schematic sectional drawing of (a), (c) is the principal part expanded sectional view of (a). FIG. It is principal part sectional drawing which shows the other example of this invention. It is principal part sectional drawing which shows the other example of this invention. It is principal part sectional drawing which shows the other example of this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

A fan convector A shown in FIGS. 1 and 2 corresponds to an example of a hot air heating apparatus according to the present invention, and includes a casing 1, a fan 2 arranged in the casing 1, a heat exchanger 3, and a cover filter 4. , And a warm air flow path 5 for guiding the warm air from the fan 2 to the warm air outlet 5a.
As members for forming the hot air flow path 5, the upper and lower hot air flow path forming members 6 and 7 shown in FIG. The upper hot air flow path forming member 6 corresponds to a specific example of the hot air flow path forming member to which the present invention is applied, but the lower hot air flow path forming member 7 does not correspond to such a specific example. The cover filter 4 corresponds to a specific example of the receiving member in the present invention.

  The basic configuration of the entire fancon vector A is the same as in Patent Documents 1 and 2, and this will be briefly described. That is, the housing 1 is configured by combining a housing body portion 10 having a front opening shape and a front panel 11 that closes the front opening portion of the housing body portion 10. The front panel 11 is provided with an air suction port 11a on which the suction negative pressure of the fan 2 acts. The cover filter 4 is arranged in the back part of the front panel 11, and the air that has passed through the filter part 41 of the cover filter 4 travels toward the heat exchanger 3. Although not shown in the drawings, the heat exchanger 3 is supplied with hot water heated using a heat source device, and the air is heated in the process of passing through the heat exchanger 3. The air heated in this way passes through the warm air flow path 5 by the action of the fan 2 and is blown out as warm air from the warm air outlet 5a. The hot air outlet 5a has a substantially horizontally long rectangular shape when viewed from the front, and a plurality of louvers 9 are provided inside or at the back of the hot air outlet 5a (the louver 9 is shown only in FIG. (Omitted in the figure.)

  The final end region of the hot air flow path 5 is formed using the frame portion 11 b of the front panel 11. On the other hand, a region closer to the fan 2 than the hot air flow path 5 is formed using a duct portion D having a cross-sectional structure as schematically shown in FIG. An internal region of the duct portion D is a hot air flow path 5. The duct portion D has upper and lower plate-like portions 60 and 70 extending in the left-right lateral direction, and a pair of left and right vertical plate portions 78 that connect these left and right end portions or portions in the vicinity thereof. Yes. The upper and lower plate-like portions 60 and 70 are a part of the upper and lower hot air flow path forming members 6 and 7, respectively.

  The upper hot air flow path forming member 6 includes a bent portion 65 connected to the base end portion of the plate portion 60 in addition to the plate portion 60 described above. The bent part 65 is a part for partitioning the upstream area and the downstream area of the fan 2, and a part of the bent part 65 is close to the fan 2. The plate-like portion 60 is a flat plate having a substantially horizontal posture, extends as described above, and extends forward from a position close to the fan 2. An end portion 60 a (tip portion) of the plate-like portion 60 is in contact with the frame portion 40 of the cover filter 4. The frame portion 40 is a portion that holds the filter portion 41, and is made of, for example, the same resin as the upper and lower hot air flow path forming members 6 and 7. The cover filter 4 is fixed so that the frame portion 40 is sandwiched between the plate-like portions 60 and 70 of the hot air flow path forming members 6 and 7 and the front panel 11.

  First and second inclined surfaces S <b> 1 and S <b> 2 are formed at the end portion 60 a of the plate-like portion 60 and the receiving portion 42 of the cover filter 4 (the portion where the end portion 60 a abuts). The first and second inclined surfaces S1 and S2 are inclined at an appropriate angle α with respect to the facing direction of the plate-like portion 60 and the hot air flow path 5 (in the present embodiment, the vertical height direction), and They are in contact with each other. The first inclined surface S1 is inclined so as to face the lower side (the hot air flow path 5 side), whereas the second inclined surface S2 faces the upper side (the outer side of the plate-like portion 60). So as to be inclined. Thus, the end portion 60a of the plate-like portion 60 is located on the upper side of the second inclined surface S2. The face-to-face contact between the first and second inclined surfaces S1 and S2 is a state where hot air is not flowing in the hot air flow path 5 and the plate-like portion 60 is not thermally expanded. Preferably, a step is not formed on the lower surface portion (a joint between the end portion 60a and the receiving portion 42) where the first and second inclined surfaces S1 and S2 are in contact with each other.

  On the other hand, the end portion of the plate-like portion 70 of the lower hot air flow path forming member 7 is also in contact with another portion of the cover filter 4, and the first and second inclined surfaces S1 are included in this contact portion. , S2 is not provided with an inclined surface. This is because, in this embodiment, the plate-like portion 70 has a temperature rise due to the rib-like or columnar wall portion 79 being continuously provided at the lower portion of the plate-like portion 70 to reinforce the plate-like portion 70. Since the amount of displacement at the end of the plate-like portion 70 is small and the possibility of abnormal noise is small, it is necessary to provide portions corresponding to the first and second inclined surfaces S1 and S2 for preventing abnormal noise generation. Because it is scarce.

  Next, the operation of the fan convector A will be described.

  First, when the fan convector A is turned on and hot air flows through the hot air flow path 5, the temperature of the plate-like portion 60 of the upper hot air flow path forming member 6 rises. In this case, since the temperature on the lower surface side (inner surface side) of the plate-like portion 60 is higher than that on the upper surface side (outer surface side), the thermal expansion amount ΔL1 on the lower surface side of the plate-like portion 60 is on the upper surface side. It becomes larger than the thermal expansion amount ΔL2 (see FIG. 2C). Then, a stress that causes warping deformation is generated in the plate-like portion 60 in a manner schematically shown by an arrow Na, and the end portion 60a of the plate-like portion 60 is displaced obliquely to the upper left in the figure. On the other hand, in the present embodiment, when the end portion 60a of the plate-like portion 60 is displaced upward based on the provision of the first and second inclined surfaces S1 and S2 described above, The inclined surfaces S1 and S2 do not rub against each other with a long stroke. Therefore, no abnormal noise is generated. Further, when the plate-like portion 60 is thermally expanded, the end portion 60a of the plate-like portion 60 does not remain in strong pressure contact with the receiving portion 42, so that the plate-like portion 60 is not greatly distorted. In addition, it is possible to prevent the plate-like portion 60 from being damaged.

  The first and second inclined surfaces S <b> 1 and S <b> 2 are in contact with each other without a gap during normal times when the operation of the fan convector A is turned off and hot air does not flow through the hot air flow path 5. Therefore, even though the first and second inclined surfaces S1 and S2 are located in the vicinity of the hot air outlet 5a and visible from the outside, these portions appear unnatural. There is nothing.

  3 to 5 show other embodiments of the present invention. In these drawings, elements that are the same as or similar to those in the above embodiment are denoted by the same reference numerals as those in the above embodiment, and redundant description is omitted.

  In the embodiment shown in FIG. 3, the inclination directions of the first and second inclined surfaces S1, S2 are opposite to those in the above-described embodiment. Specifically, the first inclined surface S1 is inclined so as to face the upper side (the outer side of the plate-like portion 60), and the second inclined surface S2 is the lower side (the hot air flow channel 5 side). ) To incline. The end portion 60a of the plate-like portion 60 is located below the second inclined surface S2.

  According to the present embodiment, the temperature of the plate-like portion 60 rises due to the warm air flowing through the hot air flow path 5, and warp deformation is caused in the manner shown schematically by the arrow Na in the plate-like portion 60. Even when the end portion 60a of the plate-like portion 60 tends to be displaced obliquely to the upper left in the figure when stress is generated, such displacement is prevented by the contact of the first and second inclined surfaces S1 and S2. Is done. On the other hand, the direction in which the first and second inclined surfaces S1, S2 are in contact with each other substantially coincides with the direction in which the end portion 60a of the plate-like portion 60 is about to be displaced. For this reason, the first and second inclined surfaces S1, S2 do not rub against each other with a long stroke. Therefore, no abnormal noise such as rubbing noise is generated. Unlike the above-described embodiment, the first and second inclined surfaces S1 and S2 can remain face-to-face and no gaps can be formed between them, so that the hot air in the hot air flow path 5 is free from the gaps. It is possible to appropriately avoid problems such as passing through and leaking.

In the embodiment shown in FIG. 4, a highly slidable sheet 8 having a surface friction coefficient smaller than that of the second inclined surface S2 is bonded to the second inclined surface S2. The high slidable sheet 8 is, for example, an ultra high molecular weight polyethylene sheet.
According to such a configuration, the cost is increased by using the highly slidable sheet 8, but even if a situation occurs in which the first and second inclined surfaces S <b> 1 and S <b> 2 are rubbed strongly, a rubbing sound is generated. It is possible to increase the effect of preventing abnormal noise generation.
In the present embodiment, the highly slidable sheet 8 is bonded to the second inclined surface S2, but instead of or in addition to this, a configuration may be adopted in which the high slidable sheet 8 is bonded to the first inclined surface S1. it can.

  In the embodiment shown in FIG. 5, two first inclined surfaces S <b> 1 are formed on the end 60 a of the plate-like portion 60 with the non-inclined surface Sa interposed therebetween. Correspondingly, the receiving portion 42 is formed with a non-inclined surface Sb facing the non-inclined surface Sa and two second inclined surfaces S2 sandwiching the non-inclined surface Sb. Even with such a configuration, it is possible to obtain the same operation as that of the above-described embodiment.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the hot air heating apparatus according to the present invention can be variously modified within the range intended by the present invention.

  In the above-described embodiment, the first and second inclined surfaces S1 and S2 are configured to face each other when the plate-like portion 60 is not thermally expanded, but the present invention is limited to this. Not. In the present invention, the first and second inclined surfaces S1 and S2 may be configured to face each other at a minute interval. Even in such a configuration, in the course of thermal expansion of the plate-like portion 60, the first inclined surface S1 approaches the second inclined surface S2 and comes into contact with each other. It is possible to obtain the same effect as the form.

  The specific types, shapes, sizes, materials, etc. of the hot air flow path forming member and the receiving member in the present invention are not limited. The hot air flow path forming member only needs to have a plate-like portion for forming the hot air flow path. The plate-like portion does not necessarily have a flat plate shape, and may be, for example, a bent portion, a plate-like portion provided with an uneven portion, a plate-like portion that is entirely or partially curved, or the like. The hot air flow path referred to in the present invention is a flow path for circulating the air after being heated using a heat source, and is not limited to the one located in the vicinity of the hot air outlet. As the receiving member, various members other than the cover filter 4 can be applied.

  The hot air heating apparatus according to the present invention is not limited to the fan convector. It can also be configured as a gas hot air heater, an oil hot air heater, an electric heater type hot air heater or the like.

A Fancon vector (hot air heater)
D Duct portion S1, S2 First and second inclined surfaces 4 Cover filter (receiving member)
42 Receiving part 5 Hot air flow path 5a Hot air outlet 6 Hot air flow path forming member 60 Plate-like part 60a End part 8 High slidability sheet

Claims (5)

A hot air channel forming member having a plate-like portion for forming the hot air channel;
A receiving member having a receiving part with which the end of the plate-like part abuts or approaches;
A warm air heating device comprising:
The end portion and the receiving portion are formed with first and second inclined surfaces that are inclined with respect to the facing direction of the plate-like portion and the warm air flow path, and that face to face or face each other. A hot-air heater characterized by that. The hot air heating device according to claim 1,
The first inclined surface is inclined to face the warm air flow path side, and the second inclined surface is inclined to face the outer side of the plate-like portion,
The warm air heating device, wherein the end of the plate-like part is located on the outer side of the plate-like part with respect to the second inclined surface. The hot air heating device according to claim 1,
The first inclined surface is inclined so as to face the outer side of the plate-like portion, and the second inclined surface is inclined so as to face the warm air flow path side,
The warm air heating device, wherein the end portion of the plate-like portion is located closer to the warm air flow path than the second inclined surface. The hot air heating device according to any one of claims 1 to 3,
It has a duct part that forms the warm air flow path inside,
The duct portion has at least one plate-like portion extending in the left-right lateral direction so that the hot air outlet at the end of the hot-air flow path has a substantially horizontally long rectangular shape when viewed from the front, and the plate-like portion is A warm air heating device, which is the plate-like portion of the warm air flow path forming member. The hot air heating device according to any one of claims 1 to 4,
At least one inclined surface of said 1st and 2nd inclined surface is a warm air heating apparatus covered with the highly slidable sheet | seat whose surface friction coefficient is smaller than this inclined surface.

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