JPS58138943A - Forced air supply and exhaust type hot air room heater - Google Patents

Abstract

PURPOSE:To prevent occurrence of troubles such as a leakage of combustion exhaust gas into a room by a survey whether the combustion exhaust gas is exhausted properly or not. CONSTITUTION:In the hot air room heater of forced air supply and exhaust type in which the exhaustion of the combustion exhaust gas and takein of combustion air are both carried out by an air supply and exhaust top mounted as projecting out of the room and generally outdoors, two thermisters 5 and 6 are provided in the vicinity of an air inlet and in the vicinity of an air supply pipe connection part for detecting temperature at two points in an air supply passage S2 of combustion air as changes in resistance. This constitutes a safety device which gives an alarm or stops the room heating operation when any remarkable temperature difference is not detected between the thermisters 5 and 6. The thermisters 5 and 6 constitute a bridge circuit 9 together with two resistors 7 and 8. Thus, a voltage generated in a resistor 11 inserted into a bridge passage 10 is inputted into a comparison circuit (amplifying circuit), and a resistance difference between the thermisters 5 and 6 is formed into a control signal driving an ON-OFF relay of an operation switch, or a command signal flashing a lamp.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a forced air supply/exhaust type hot air heater that exhausts combustion exhaust gas and takes in air for combustion using an air supply/exhaust top installed outdoors (mostly outdoors). It is divided into

This type of heater is called the FIIF type, and has the advantage that the combustion waste 1 does not pollute the interior of the room. The combustion exhaust gas is guided from the combustion tube through the heat exchanger to the exhaust pipe, and then exhausted to the outdoors from one exhaust path at the top of the supply and exhaust system, ensuring that the exhaust line is maintained in an appropriate state. If there is tll, is the combustion exhaust gas indoors? There's no such thing as being muffled. However, if one part of the exhaust thread V is torn due to age deterioration, or if the exhaust pipe is operated without knowing that it is poorly connected or has fallen off, combustion exhaust gas may leak indoors.
I can't put it out. Currently, there are no devices equipped with a function to monitor whether the combustion exhaust gas is properly vented outdoors, and users must be careful about whether or not the iPa exhaust gas is being vented properly.

The present invention is a forced air supply/exhaust type temperature control system equipped with a safety device that monitors whether or not combustion exhaust gas is properly exhausted and prevents troubles such as combustion exhaust gas leaking into the guide. Wind heating, each of which is intended to provide.

Next, the structure of the present invention will be explained in detail based on the example shown in the drawings.

The forced air supply/exhaust double hot air heater as an application example of the present invention shown in Drawing 1 has a lees exhaust top (1) with a jacket pipe structure with one side protruding outside, as is generally well known. intake of combustion air into the main body 12+ through;
This is to exhaust the combustion exhaust gas from the main body (2+ to the outside), and the exhaust passage (31) inside the supply and exhaust toso 7"<1+
) On the other hand, the exhaust pipe (3) extending from the head on the outlet side of the heat exchanger is connected to the air supply/exhaust top (air supply path outside the IJ).
S2)) Flexible propulsion supply pipes (4) extending from the suction side of the combustion blower are connected to the burners.

A combustion tube with a non-exchanger and an i-burner installed is connected at the inlet side, contacts the air flow formed by the convection blower that sucks indoor air, and blows out the air from the convection blower into the room. is warm air.

Combustion air, which is used to burn fuel, flows through the exhaust passage (Sl) of the supply/exhaust top [1] while flowing through the supply air passage (S2) of the supply/exhaust top [1]. The relatively high temperature combustion exhaust gas (usually 100aC~poo'c) is warmed by the relatively high temperature of the combustion exhaust gas (usually 100aC~poo'c).
) is supplied to one burner by a combustion blower. The temperature rise in the supply air passage (S2) of the combustion air probe is caused by the temperature rise in the exhaust passage (S2).
Due to the combustion exhaust gas flowing through the exhaust passage (Sl), the exhaust passage (Sl) is properly t.
If not, it will decrease. Therefore, the combustion air supply path (S2
), detect the temperature at the upstream and downstream parts, that is, near the air supply port and at the connection part of the air supply pipe, and check the temperature difference between them.
By determining whether or not this is the case, it is possible to indirectly but accurately determine whether or not the combustion exhaust gas is properly exhausted outdoors. That is, in this example, there are two points in the air supply path (S2) t for detecting the temperature at two points in the combustion air supply path (S2) as a change in resistance value. A safety device is installed near the connection of the two air supply pipes and issues an alarm or stops the heating operation when the temperature detected by the thermistors (5) and (6) is balanced with almost no temperature difference. It is composed of

That is, two thermistors (5+, - (6J and a bridge circuit 19 consisting of two resistors (7) and 181) are constructed as shown in FIG. The resulting voltage is input to a comparison circuit (amplifier circuit), and the difference in resistance value of the thermistor (51, f61 is used as a control signal to operate the on/off relay of the operation switch, or
This is a command signal (σ) that causes a lamp to blink. If the thermistor (5) and (6) have the same resistance value, the bridge circuit [9] is balanced and the bridge circuit is 00t.
This is when the output appears t', and if there is a difference in the resistance value F of the thermistors (5) and (6), the equilibrium is broken t'l, and the bridge a
The old output appears. Therefore, the exhaust path (Sl
) so that the combustion exhaust gas flows properly.
S2) 4 There is a clear temperature difference between the two points of the combustion air, and the equilibrium of the bridge circuit [9] is broken.
Proper 1. Is there a flow of combustion exhaust gas?If it is flowing into the room (n), the combustion air flowing through the air supply path (S2) σJ temperature rise & IJ bump, the equilibrium of the Buri-Fuji circuit [9] However, the safety device based on the pre-fuji circuit 191, which is set at 1 at the start of heating, is required to be suspended for a short time.Otherwise, When the safety device starts lI!12IJ, it is necessary to perform this operation and shut it down. However, damage to the structure of the exhaust thread, poor connection, detachment of the exhaust pipe, etc. may cause the combustion exhaust gas to be properly exhausted outdoors. If not, notify the user of this,
Alternatively, the heating operation can be stopped immediately to prevent combustion exhaust gas from leaking into the room. In addition, devices other than thermistors such as germanium semiconductors or thermocouples may also be used to construct the safety device.

As is clear from the description of the embodiments, the forced air supply/exhaust hot air heater of the present invention has the following features: intake of combustion air;
The degree to which the temperature of the combustion air rises due to the combustion exhaust gas is detected as a temperature difference at the jacket-structured exhaust knob that exhausts the combustion exhaust gas, and determines whether there is a temperature difference or not. The device is equipped with a safety device that activates an alarm or operation control operation in response to this, so it can be detected by exhaust gas from the exhaust system, trouble or leakage into the room, or a decrease in the temperature rise of the combustion air. It is important to prevent accidents such as carbon monoxide poisoning caused by poor exhaust and combustion exhaust gas leaking into the room.

[Brief explanation of the drawing]

Fig. 1q is a side view of a forced air supply/exhaust type hot air heater as an application example of the present invention, Fig. 2 is an enlarged A view showing the air supply/exhaust top, and Fig. 3 is an example of safety equipment. FIG. 2 is a circuit diagram showing a bridge circuit of FIG. Note that the same reference numerals in the figures indicate the same or equivalent parts. [1)... Supply and exhaust, top (21... Main body (3)...
Exhaust λ pipe (4)... Air supply pipe (5) e・Smister (6)... Thermistor (71, T81... Resistance
[9)...Buri, Ji circuit (Sl)...Exhaust path
(S2)...M airway agent Shin Kuzuno −

Claims (1)

[Claims] It flows through the air supply path at the top of the supply/exhaust pipe with a jacket pipe structure, which is the terminal part related to supply/exhaust, for exhausting combustion exhaust gas sent out from the main body to the outside and intake of combustion air, which is outside air, into the main body. In order to balance the temperature between two points in the combustion air supply path, the forced air supply/exhaust hot air system is equipped with a safety device for alarm operation or operation control. heater.