JPH0247410Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a type of hot air heater equipped with main and sub-heat exchange air.

The main heat exchanger a and the main heat exchanger a are placed on the front side of a housing e that accommodates the main heat exchanger a, a sub-heat exchanger c that faces the back side of the main heat exchanger and is connected to it via a communication pipe b, and a convection blower d. A hot air heater provided with hot air outlets f of approximately the same width is generally known.

In this device, in order to make the hot air temperature distribution from the hot air outlet f almost uniform, the main heat exchanger a
In addition, it is desirable that the auxiliary heat exchanger c has a relatively wide width that is approximately equal to the hot air outlet f. However, in the conventional type, as shown in Figs. 6 and 7, a sub-heat exchanger c consisting of one flat heat exchanger facing the back side of a main heat exchanger a is connected by a plurality of communicating pipes b. , and in this one, the main heat exchanger a
The temperature of the side is higher than that of the auxiliary heat exchanger c. Or, expansion on the main heat exchanger side may occur due to differences in materials (the main heat exchanger is made of heat-resistant steel plates, and the secondary heat exchangers are generally made of contact-resistant stainless steel plates because of the generation of condensate). is larger than that of the auxiliary heat exchanger.

As a result, excessive force is applied to the communication pipe portion of the auxiliary heat exchanger, and there is a risk that this portion may be damaged.

(Problems to be Solved by the Invention) The object of the present invention is to provide a warm air heater that is free from such inconveniences.

(Means for solving the problem) The present invention includes a main heat exchanger that is horizontally long and has approximately the same width as the hot air outlet, and a main heat exchanger that is approximately the same width as the hot air outlet, and a main heat exchanger that is approximately the same width as the hot air outlet, and a main heat exchanger that is approximately the same width as the hot air outlet, and a In a device that houses a sub-heat exchanger connected to this via a facing communication pipe and a convection blower, the sub-heat exchanger is stacked back and forth with an interval and is rotatable in the center. It is composed of a first and second flat heat exchanger that are communicated with each other by a communication pipe, and both heat exchangers are arranged at the other two apex positions of a triangle whose communication point in the central part is one of the apexes. , are connected to the main heat exchanger via individually rotatable communication tubes.

(Embodiment) An embodiment of the present invention will be explained with reference to the drawings.
4 is a main heat exchanger having a width that is approximately the same width as the hot air outlet 2 housed in the housing 1; A sub-heat exchanger 6 communicates with the main and sub-exchangers 3 and 4, and 6 indicates a convection blower consisting of a Sirotskov fan installed above the main and sub-exchangers 3 and 4. , 4 to form hot air, which is sent out from the air outlet 2 to heat the room or the like in which the heater is installed. The configuration up to now is not particularly different from that commonly used in the past.

The present invention provides a hot-air heater with such a configuration, in which the sub-heat exchanger 4 is connected to the secondary heat exchanger 4 by a rotatable communication pipe 7 which is overlapped in the front and back with an interval between them. 1 Consisting of second flat heat exchangers 4a and 4b, both heat exchangers 4a and 4b are rotated separately at the other two apex positions of a triangle with the communicating part of the central portion as one of the apexes. It communicates with the main heat exchanger 3 via freely movable communication pipes 5, 5. To explain this further, both heat exchangers 4a, 4
The short pipes 7a, 7a are respectively protruded from the opposing surfaces of b, and these are rotatably fitted to each other to form the communication pipe 7, and the main heat exchanger is located at the other two apex positions of the triangle. One short tube 5a, 5d is made to protrude from each heat exchanger 4a, 4b corresponding to the positions on both sides of the upper part of main heat exchanger 3.
A freely rotatable communication tube 5 is constructed by fitting short tubes 5a, 5a protruding backward from both upper sides of the tube. In the drawing, 9 is a gas burner or other burner housed in the lower part of the main heat exchanger 3, 10 is a fuel supply port of the burner 9, 11 is a secondary air intake provided in the lower part of the main heat exchanger 2, and 12 is a The exhaust pipe connected to the heat exchanger 4b is shown.

(Function) The combustion exhaust from the burner 9 provided in the main heat exchanger 2 heats the main and auxiliary heat exchangers 3 and 4, and the convection blower 6
When the hot air is sent out from the outlet 2 after exchanging heat with the air from the air outlet 2, the main and sub heat exchangers 3 and 4 exhibit different expansions as described above, and the main heat exchanger 3 in particular expands greatly.

However, the auxiliary heat exchanger is composed of a first and second flat heat exchanger which are stacked one on the other with a space between them and which are communicated with each other by a rotatable communication tube in the center. The exchanger was connected to the main heat exchanger at the other two apex positions of the triangle, with the communication point at the center being one of the apexes, through separate rotatable communication pipes, so that the main heat Even if there are different expansions in the exchanger and the sub-heat exchanger, the rotation of the communication pipes 5 and 7 allows both heat exchangers 4 to be expanded as shown in FIG.
The communication pipes 5, 5 of each heat exchanger 4a, 4b correspond to the elongation of the main heat exchanger 3 of the main heat exchanger 3 and each heat exchanger 4a, 4b, centering on the communication pipe 7 that communicates the heat exchangers 4a, 4b.
movement of the communication part is allowed.

Therefore, it is possible to prevent stress from concentrating on that part.

In this way, according to the present invention, the auxiliary heat exchanger is made up of first and second flat heat exchangers that are stacked back and forth with a space between them and that are communicated with each other through a rotatable communication tube at the center. At the same time, the two heat exchangers are connected to the main heat exchanger via freely rotatable communication pipes at the other two apex positions of a triangle, with the communication point in the central portion being one of the apexes. Therefore, when the main sub heat exchanger expands and contracts, the concentration of stress that occurs in the communication parts of the communication pipes of the sub heat exchanger can be released by rotating each communication pipe, thereby preventing damage to these parts. It has the effect of preventing it from happening.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view showing one example of implementing the present invention;
Figure 2 is a cross-sectional view of the line, and Figure 3 is the same.
4 is a cross-sectional view taken along the - line in FIG. 2, FIG. 5 is an explanatory diagram for explaining its operation, and FIG.
The figure is a cross-sectional side view of a conventional example, and FIG. 7 is a cross-sectional view taken along the line -2. 1... Instrument housing, 2... Warm air outlet, 3... Main heat exchanger, 4... Sub-heat exchanger, 5, 7... Communication pipe.

Claims (1)

[Scope of utility model registration request] Inside the cabinet, which has a wide hot air outlet on the front, there is a horizontally long main heat exchanger that is approximately the same width as the hot air outlet, and a sub-heat exchanger that faces the back side of the main heat exchanger and is connected to it via a communication pipe. and a convection blower, in which the sub heat exchanger is connected to a first and a second heat exchanger which are stacked back and forth with an interval and communicated with each other by a rotatable communication pipe in the central part. It is composed of a flat heat exchanger, and the two heat exchangers are connected at the other two apex positions of a triangle with the communication point in the center part as one of the apexes, respectively, through freely rotatable communication tubes. A hot air heater connected to the main heat exchanger.