JPS5839334Y2 - Kiyosei Kiyuu Hai Kishiki Onpuudanbouki - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a forced air supply/exhaust hot air heater using a blower for blowing indoor circulating air and a secondary heat exchanger for combustion exhaust gas.

A cross-flow fan is used to blow air for indoor circulation in conventional hot-air heaters, but the cross-flow fan has a cylindrical shape with a large width and diameter, so it requires a large space, and its installation is difficult. Location is restricted.

Also, the temperature of the combustion exhaust gas that has passed through the heat exchanger is still relatively high, so a secondary heat exchanger is installed to lower the temperature of the exhaust gas, but in this case, the temperature of the combustion exhaust gas is still relatively high. It requires a large space and has the disadvantage that the blower must be large because the passage resistance due to the secondary heat exchanger increases.

The purpose of this invention is to use a centrifugal blower such as a sirocco fan or a turbo fan as the indoor circulation air blower, and furthermore, to minimize the space occupied by the secondary heat exchanger, thereby making the entire warm air heater more compact. An example will be explained.

FIG. 1 is a perspective view of the blower and heat exchanger of the hot air heater of the present invention, and FIG. 2 is a sectional view of FIG. 1.

Reference numeral 1 denotes a rectangular rectangular parallelepiped ventilation collection chamber having approximately the same length as the horizontally long heat exchanger 2, and a large number of openings 1A are provided on the side facing the heat exchanger 2. .

Reference numeral 3 designates a sirocco fan that blows air into the ventilation collection chamber 1, 4 an exhaust communication pipe that is connected to the heat exchanger 2 and guides exhaust gas to the exhaust port through the inside of the ventilation collection chamber 1, and 5 a burner.

According to the above structure, the combustion air is combusted in the burner 5, becomes exhaust gas, passes through the heat exchanger 2, and is sent to the exhaust gas communication pipe 4 inside the ventilation collective chamber 1.

At this time, the exhaust communication pipe 4 plays the role of a secondary heat exchanger that exchanges heat with the indoor circulating air collected in the air collection chamber 1 by the sirocco fan 3.

Indoor circulation air that has undergone heat exchange in the ventilation collective room 1 is passed through opening 1.
It is sent from A to heat exchanger 2 and exchanges heat with exhaust gas.
It becomes even hotter and is sent indoors.

That is, the air blown by the sirocco fan 3, which is much smaller than the crossflow fan, is converted into air blown almost evenly over the entire horizontal length of the heat exchanger 2 in the air collection chamber 1, and the air is blown out almost evenly over the entire horizontal length of the heat exchanger 2. 2, efficient heat exchange is performed.

In other words, the sirocco fan 3 and the air collection chamber 1 function as a conventional cross flow fan.

Moreover, since this collecting chamber 1 also serves as a conventional secondary heat exchanger, the space occupied by these parts can be significantly reduced compared to the conventional one. The size of the fan may also be smaller than that of a conventional cross flow fan, facilitating miniaturization.

Figures 3 and 4 show the ventilation collecting room 1 to increase the heat exchange rate.
Fig. 3 shows a modified exhaust communication pipe 4 in which the exhaust communication pipe 4 is branched into many thin pipes 4A, and Fig. 4 shows a variation in which the exhaust communication pipe 4 is provided with radiation fins 4B. It shows.

According to the forced air supply/exhaust hot air heater of the present invention, heat exchange can be performed efficiently while using a centrifugal blower such as a sirocco fan or a turbo fan.

Furthermore, since the air collection chamber is used for both the conventional cross-flow fan and the secondary heat exchanger, the space occupied by the air blower and secondary heat exchanger can be significantly reduced, making the hot air heater more compact. can be measured.

[Brief explanation of drawings]

Figure 1 is a perspective view of the blower section and heat exchanger of the forced air supply and exhaust hot air heater of the present invention, Figure 2 is a sectional view of Figure 1, and Figures 3 and 4 are the air blower assembly of the present invention. This is a modification of an indoor exhaust communication pipe. 1: Ventilation gathering room, 1A: Opening, 2: Heat exchanger, 3: Sirocco fan, 4: Exhaust connecting pipe, 4A: Thin pipe branched from exhaust connecting pipe, 4B: Radiation fin.

Claims (1)

[Scope of Claim for Utility Model Registration] In a hot air heater in which room air is forcibly circulated by a blower through a horizontally long combustion heat exchanger, a horizontally long air blower having approximately the same length as the above-mentioned heat exchanger. A gathering chamber is provided opposite to the heat exchanger and has a number of openings facing the heat exchanger side, and a centrifugal blower is connected to the ventilation gathering chamber to blow indoor air into the gathering chamber, A forced air supply/exhaust hot air heater characterized in that an exhaust communication pipe from the heat exchanger is led out to the exhaust port through the air collection chamber.