JPS61246518A - Kerosene small-size hot water supplier - Google Patents

Abstract

PURPOSE:To enable to make sound soft and eliminate instability of resistance around a suction opening at the same time by installing a cover and a guider in such a manner that an outside of a mainbody is covered with an insulator with covering material and a suck-in opening of a blower is placed at the opposite side of the mainbody and also guider formed by wire netting is placed at the suck-in opening side simultaneously. CONSTITUTION:An outer burning cylinder 4' is covered with an insulator 26 which is composed of a glass wool etc. covered with vinyl sheet etc. and between the outer burning cylinder 4' and a base plate 21 of a blower, a covering material 25, the insulator 26 and the guider 23, and a suck-in opening 20 facing to a mainbody are connected and fixed. Noise generated from the blower is released to the outside of the mainbody and absorbed after collision with a lattice-like silencer layer and absorbed after repeated reflection and noise is made soft. Floating up movement of the covering material and the insulator is prevented by the guider 23 and resistance except a damper is kept constant, owing to a certain length of the guider.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improving the performance and noise of a blower in an oil water heater used as a heat source for a small domestic hot water supply and heating system.

BACKGROUND OF THE INVENTION Conventional water heaters of this type have been made smaller and less noisy, and various improvements have been made to the configurations of the body and blower. For example, as for the blower outside the aircraft (as shown in Figure 6), one way to minimize the noise generated from the air inlet, etc., leaking from the exterior is to move the air inlet inside, that is, facing the aircraft. It was supposed to be set up. However, in order to suppress the resistance to the flow of air (other than Gumper) into the blower suction port, it was necessary to ensure a relatively large distance between the airframes.

Problems to be Solved by the Invention As miniaturization progresses, it has become necessary to reduce the size of component parts, reduce the space required for positioning, etc., and at the same time increase the performance of functional parts. In this situation, if the blower suction port is installed opposite to the aircraft body, there are contradictory problems such as: ■ Increased noise generated due to increased performance of the blower, and ■ Increased resistance and instability near the suction port due to space reduction. The present invention solves such conventional problems by suppressing and absorbing the reflected sound on the aircraft body side of the noise generated from the blower,
This aims to reduce noise and at the same time eliminate the instability of resistance near the suction port.

Means for Solving the Problems In order to solve the above problems, the small oil water heater of the present invention has the following features:
At the same time, the outside of the aircraft is covered with a heat insulating material (e.g., glass cooler) covered with a covering material (e.g., a plastic bag, etc.), and at the same time, a guider made of wire mesh or the like is connected to the stay on the suction side of the blower. The configuration is such that the blower is installed facing the fuselage with a guider interposed in between.

Function The present invention has the above-mentioned configuration, so that a large number of sound deadening layers such as a covering material, a heat insulating material, an air layer, and a covering material are formed in a lattice shape on the outside of the aircraft body facing the blower suction port. As a result, the noise generated inside the blower and at the suction port is absorbed by colliding with the many lattice-like sound-absorbing layers, or is absorbed while being repeatedly reflected between the lattice-like sound-absorbing layers or between the lattice-like sound-absorbing layer and the blower. At the same time, the guider prevents the insulation and coating materials from lifting up.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

1 to 3, a middle cylinder 2, an auxiliary combustion cylinder 3, and inner and outer combustion cylinders 4 and 4' are erected approximately concentrically on a main body base 1. Inside the internal combustion cylinder 4, a burner ring 5 is connected to the upper part of the middle cylinder 2 and the auxiliary combustion cylinder 3, and a buckle 6 is connected above the burner ring 5. With this structure, the combustion chamber 7, A heat exchanger 8 is formed. Burner insertion holes 9 are provided in the walls of the inner and outer combustion tubes 4 and 4' located in the combustion chamber 7. The burner insertion hole 9 has a fuel pipe 11 that connects a fuel tank, a fuel pump (none of which are shown), and a fuel atomization nozzle 10, and a burner 1 that includes the fuel atomization nozzle 10 and an ignition electrode 12.
3 is inserted and adjoins the combustion chamber 7. The fuselage 14 is formed by the above components. Combustion air is supplied from a blower 18 comprising an impeller 15, a casing 16, and a motor 17 to the middle cylinder 2 in the combustion chamber 7 via a blow passage 19. The casing 16
A damper 22 that changes the area opening of the suction port 200 is rotatably and slidably connected to the blower base 21, which also serves as a part of the air blower base 21 and forms the suction port 20, and a guider formed of a wire mesh. 23 is connected to the blower base 21 by a stay 24. Further, the outer combustion tube 4'
is a heat insulating material 2 covered with a covering material 25 (for example, vinyl, etc.)
6 (e.g. glass school).

The outer combustion tube 4' (the body 14) and the blower base 21 are connected and fixed with the covering material 25, the heat insulating material 26, and the guider 23 interposed therebetween, with the suction port 20 facing each other.

In the above configuration, first, the area where the water heater is used (50/
60 Hz) Furthermore, the damper of the blower suction port is time-varyingly set depending on the exhaust outlet configuration, etc., and the opening area is uniquely determined. At startup, the impeller connected to the motor shaft rotates and the blower operates at the same time as the morph is energized. On the blower suction side, a guider with a stay of a certain length keeps the distance from the covering material and insulation material constant. Air is sucked into the casing of the blower through this gap, pressurized, and supplied from the discharge port as predetermined combustion air to the middle cylinder via the blow passage. Air is then ejected into the combustion chamber from each air ejection hole on the middle cylinder. (Then, electricity is applied to the ignition electrode, and after a certain period of time, fuel is also ejected from the atomization nozzle and burns while being mixed.) ) On the other hand, the noise generated by fluid during pressurization and discharge within the fan casing increases as the performance increases, and the suction noise also increases as the damper opening decreases.

Therefore, the opening area of the blower inlet is set depending on the installation area and exhaust outlet configuration, and the noise generated from the blower is emitted to the aircraft body. It collides with and is absorbed, or is repeatedly reflected and absorbed, resulting in quieter sound. Furthermore, lifting of the covering material and heat insulating material is prevented, and the distance from the blower suction port is always kept constant, so that the resistance near the suction port is maintained constant.

Furthermore, by increasing the number of joint points between the blower base and the airframe, chatter of the blower base can also be suppressed.

Next, another embodiment of the present invention will be described with reference to FIGS. 4 and 5. 4 and 5, the difference from the previous embodiment is that a large number of holes 27 are provided in the covering material. With this structure, the noise generated and emitted from the blower penetrates further into the sound deadening layer and is absorbed. This has the effect of making it easier to

Effects of the Invention As described above, the small oil water heater of the present invention provides the following effects.

(1) The guider prevents the covering material and the heat insulating material from lifting up and has a constant length, so the resistance other than the damper is kept constant.

2. The wire mesh of the guider forms a lattice-like noise-absorbing layer consisting of coating material, insulation material, and air layer on the outside of the aircraft, which repeatedly reflects and absorbs noise to reduce noise.

■ The number of points of contact with the aircraft body increases, suppressing the chatter of the blower (blower pace) and reducing noise.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a small oil water heater according to an embodiment of the present invention, Fig. 2 is a partially enlarged cross-sectional view of the blower attachment part of the water heater, and Fig. 3 is a line AA' in Fig. 2. 4 is a partial enlarged cross-sectional view of the blower mounting part in the embodiment of the circulation, FIG. 5 is a partial front view seen from line A-A' in FIG. 4, and FIG. FIG. 2 is a partially enlarged sectional view of a conventional blower mounting portion. 7... Combustion chamber, 8... Heat exchanger, 13
... Burner, 14 ... Aircraft, 18 ...
...Blower, 20...Suction port, 23...
... Guider, 25 ... Covering material, 26 ...
...Insulation material, 27...hole. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
--Takekui δ---Mumaru Isomasu 1st figure /J-Tsuma τ 14---Tachibana Ihon tS--Ichikan Katori 20--Ichigokiguchi z3---Guiguu 5th figure ward + target

Claims (2)

[Claims] (1) Cover the exterior of the fuselage including the combustion chamber, burner, and heat exchanger with a heat insulating material covered with a covering material, and connect the air intake port of the blower facing the airframe, and at the same time connect the air intake port side of the air blower with wire mesh. A small oil water heater equipped with a guider made of etc. (2) A small petroleum water heater according to claim 1, wherein the covering material is provided with a large number of holes.