Gas heater with wind pressure switch protection

Abstract

A gas heater with wind pressure switch protection, comprising a base, a shell, a heat insulation cylinder, a power switch, an air inlet electromagnetic valve and a wind pressure switch, the power switch, the wind pressure switch and the air inlet electromagnetic valve are electrically connected in sequence, the wind pressure switch is arranged in the base, and a negative pressure end extends into a gap between the shell and the heat insulation cylinder; a through hole is arranged on the shell; the gas heater further comprises a gas guide pipe and a Venturi tube, the Venturi tube comprises a main pipe body and a branch pipe body, the main pipe body comprises an air inlet circular conical frustum part and an air outlet circular conical frustum part, and the branch pipe body is in communication with an air inlet end of the air outlet circular conical frustum part; the main pipe body is located in the shell, the branch pipe body extends into the base through the through hole, and the gas guide pipe is in communication with the branch pipe body and a negative pressure cavity of the wind pressure switch. The Venturi tube is arranged to prevent the pressure of the negative pressure cavity of the wind pressure switch from being too large, thereby prolonging the service life.

Description

Technical Field

[0001] This utility model relates to a gas heater. Background Technology

[0002] The existing technology, Chinese patent 201620373204.4, describes a gas heater, including a base, outer shell, heat insulation cylinder, bottom plate, nozzle, ignition needle, air inlet pipe connector, air inlet solenoid valve, air inlet pipe, fan blade, and motor. A gap is left between the tail end of the heat insulation cylinder and the bottom plate, and gaps are left between the outer periphery of the heat insulation cylinder and the inner wall of the outer shell. A wind pressure switch assembly is also provided inside the outer shell, including a micro switch and a force-bearing plate, with the force-bearing plate located directly in front of the fan blade. It also includes an ignition controller, knob, power switch, and thermocouple. The ignition needle, thermocouple, micro switch, and air inlet solenoid valve are all electrically connected to the ignition controller, and the micro switch is connected in series with the air inlet solenoid valve. Problems: The negative pressure end of the wind pressure switch assembly is inside the outer shell and heat insulation cylinder, resulting in high wind speed, high negative pressure, and a short service life for the wind pressure switch. Utility Model Content

[0003] The purpose of this invention is to provide a gas heater with a wind pressure switch protection feature, which has the characteristics of protecting the wind pressure switch and having a long service life.

[0004] This utility model is implemented as follows: a gas heater with wind pressure switch protection includes a base, a shell, a heat insulation cylinder, a power switch, an air intake solenoid valve and a wind pressure switch. The power switch, wind pressure switch and air intake solenoid valve are electrically connected in sequence. The wind pressure switch is located inside the base, and the negative pressure end extends into the gap between the shell and the heat insulation cylinder. Its special feature is that the shell is provided with a through hole.

[0005] It also includes the airway and the venturi tube.

[0006] The venturi tube includes a main body and branch bodies. The main body includes an air inlet truncated cone and an air outlet truncated cone. The branch body is connected to the air inlet end of the air outlet truncated cone.

[0007] The main body is located inside the outer casing, and the branch body extends into the base through the through hole. The air guide pipe connects the branch body and the negative pressure chamber of the air pressure switch.

[0008] The gas heater with wind pressure switch protection is characterized in that it also includes a frame-shaped base with an upper opening, the bottom plate of the frame-shaped base plate has a bottom hole, and the longitudinal wall plate has an arc-shaped foot plate.

[0009] The branch pipe body is provided with a fixed base plate;

[0010] The fixed base plate is fixed to the base plate, the branch pipe extends out of the frame-shaped base through the bottom hole, and the arc-shaped foot plate is fitted and fixed to the outer shell.

[0011] This utility model discloses a gas heater with a wind pressure switch protection. The venturi tube design prevents excessive pressure in the negative pressure chamber of the wind pressure switch, thus extending its service life. Attached Figure Description

[0012] Figure 1 This is a three-dimensional sectional view of the present invention.

[0013] Figure 2 This is a partial perspective view of the present invention.

[0014] Figure 3 This is a cross-sectional view of the venturi tube of this utility model.

[0015] Figure 4 This is an exploded perspective view of this utility model.

[0016] Figure 5 This is a perspective view of the present invention. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1 As shown, a gas heater with a wind pressure switch 6 for protection includes a base 1, a shell 2, a heat insulation cylinder 3, a power switch 4, an air intake solenoid valve 5, and a wind pressure switch 6. The power switch 4, the wind pressure switch 6, and the air intake solenoid valve 5 are electrically connected in sequence. The wind pressure switch 6 is located inside the base 1, and its negative pressure end extends into the gap between the shell 2 and the heat insulation cylinder 3.

[0020] The outer shell 2 is provided with a through hole 21;

[0021] It also includes the air duct 7 and the venturi tube 8.

[0022] The venturi tube 8 includes a main body 81 and a branch body 82. The main body 81 includes an inlet frustum-shaped portion 811 and an outlet frustum-shaped portion 812. The branch body 82 is connected to the inlet end of the outlet frustum-shaped portion 812. The top rounded end of the inlet frustum-shaped portion 811 is connected to the top rounded end of the outlet frustum-shaped portion 812.

[0023] The main pipe 81 is located inside the outer casing 2, and the branch pipe 82 extends into the base 1 through the through hole 21. The air guide pipe 7 connects the branch pipe 82 and the negative pressure chamber of the air pressure switch 6. The venturi tube is designed to prevent damage to the air pressure switch caused by the high power of the motor during long-term operation.

[0024] As a further improvement of this utility model, it also includes a frame-shaped seat 9 with an upper opening, the bottom plate of the frame-shaped seat plate 91 is provided with a bottom hole, and the longitudinal wall plate 92 is provided with an arc-shaped foot plate 93.

[0025] The branch pipe body 82 is provided with a fixed seat plate 83;

[0026] The fixed base plate 83 is fixed to the bottom plate of the frame-shaped base plate 91, the branch pipe 82 extends out of the frame-shaped base 9 through the bottom hole, and the arc-shaped foot plate 93 is fitted and fixed to the outer shell 2.

[0027] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas heater with a wind pressure switch protection, comprising a base, a shell, a heat insulation cylinder, a power switch, an inlet solenoid valve, and a wind pressure switch, wherein the power switch, the wind pressure switch, and the inlet solenoid valve are electrically connected in sequence, and the wind pressure switch is disposed inside the base, with its negative pressure end extending into the gap between the shell and the heat insulation cylinder; characterized in that: The outer shell is provided with a through hole; It also includes the airway and the venturi tube. The venturi tube includes a main body and branch bodies. The main body includes an air inlet truncated cone and an air outlet truncated cone. The branch body is connected to the air inlet end of the air outlet truncated cone. The main body is located inside the outer casing, and the branch body extends into the base through the through hole. The air guide pipe connects the branch body and the negative pressure chamber of the air pressure switch.

2. A gas heater with wind pressure switch protection according to claim 1, characterized in that: It also includes a frame-shaped seat with an opening at the top, the bottom plate of the frame-shaped seat plate has a bottom hole, and the longitudinal wall plate has an arc-shaped foot plate; The branch pipe body is provided with a fixed base plate; The fixed base plate is fixed to the base plate, the branch pipe extends out of the frame-shaped base through the bottom hole, and the arc-shaped foot plate is fitted and fixed to the outer shell.

Images