An electric heater with high-efficiency heat exchanger

Abstract

The present invention discloses an electric heater with a high-efficiency heat exchanger, comprising a casing, a heat exchanger in the casing and a blowing module, the blowing module comprising an impeller and an impeller base, the heat exchanger comprising an air duct shell and a heating module in the air duct shell; the heating module comprising a heating lamp tube, guide plates are arranged on both sides of the heating lamp tube to form a heating chamber to surround the heating lamp tube, limit the radiation light source of the heating lamp tube within the heating chamber, reduce the loss of radiation, and enable the heating lamp tube to concentrate on heating the area near the heating chamber, thereby improving the heating efficiency; since the heating lamp tube is arranged in the heating chamber, direct wind blowing on the heating lamp tube is avoided, and the wind blows through the two sides of the heating chamber, and forms a negative pressure at the vent of the heating chamber under the principle of atmospheric pressure, so that the heat in the heating chamber is taken out and mixed with the wind to form hot wind; the outer surface protrusion of the guide plate has a guiding effect, which can reduce the friction with the wind and the occurrence of turbulence, thereby reducing the wind outlet noise.

Description

Technical Field

[0001] The invention relates to the field of electric heaters. Background Art

[0002] An electric heater is a device that uses electricity as energy for heating. A common type of electric heater is a hot air heater that uses the heat radiation of an electric heating lamp as a heat source. The electric heater includes a blowing module and a heat exchanger equipped with an electric heating lamp. The heat exchanger has an air duct connected to the blowing module. The electric heating lamp is arranged in the air duct and radiates on the wall of the air duct. Heat is generated by continuous reflection between the walls. The blowing module blows wind into the air duct and takes away the heat on the wall of the air duct and blows it out to form hot air. However, at present, the above-mentioned hot air heater has the following defects: 1. Since the light source of the electric heating lamp will be scattered in an unconcentrated manner on all the walls of the air duct in the air duct, the heating is very slow, and the air duct has an air inlet and an air outlet. Part of the radiant heat of the electric heating lamp will be radiated out from the air inlet and outlet, and the heat formed by the reflection of the radiant heat through the wall will also be directly dissipated from the air inlet and outlet, and a large amount of radiant heat will be lost; 2. The electric heating lamp is directly arranged in the air duct. When the wind blows directly on the electric heating lamp, a certain turbulence will be generated to form wind noise, which affects the user experience. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an electric heater with a high-efficiency heat exchanger.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] An electric heater with a high-efficiency heat exchanger comprises a casing, a heat exchanger in the casing and a blowing module, wherein the blowing module comprises an impeller and an impeller base, the heat exchanger comprises an air duct shell connected to the impeller base and a heating module disposed in the air duct shell, the heating module comprises a heating lamp tube, guide plates are arranged on both sides of the heating lamp tube, and a heating chamber enclosing the heating lamp tube is formed between the guide plates on both sides, the guide plates on both sides are arranged front and back according to the air outlet direction of the air duct shell, and the outer surface of the guide plate close to the air inlet of the air duct shell is raised to have a guiding function and is arranged in front of the heating tube along the air inlet direction, and an air vent for the heating chamber is left between the guide plates.

[0006] The guide plate has a "V"-shaped cross section, and the guide plates on both sides are symmetrically arranged, with their sharp corners arranged outwards.

[0007] The blowing module and the side of the heat exchanger are also provided with electrical components, and a partition is provided above the air vent on one side of the heating chamber facing the electric control module.

[0008] The heating lamp tube has two guide plates arranged close to two sides.

[0009] The impeller is a centrifugal impeller. The impeller base comprises a cover body for accommodating the impeller. A motor for driving the impeller is arranged at the end of the cover body.

[0010] The beneficial effects of the present invention are as follows: 1. Guide plates are arranged on both sides of the heating lamp tube to form a heating chamber to surround the heating lamp tube, so that the radiant heat of the heating lamp tube is limited in the heating chamber, the loss of radiant heat is reduced, and the heating lamp tube can concentrate on irradiating the area near the heating chamber, and the radiant heat is continuously reflected in the heating chamber, and the radiant heating is quickly radiated to improve the heating efficiency; 2. Since the heating lamp tube is arranged in the heating chamber, the wind is prevented from blowing directly on the heating lamp tube, and the outer surface of the guide plate has a guiding effect, which can reduce the occurrence of turbulence and thus reduce the wind noise, while the wind blows through the two sides of the heating chamber and forms a negative pressure at the vent of the heating chamber under the principle of atmospheric pressure, so that the heat in the heating chamber is taken out and mixed with the wind to form hot air; 3. The guide plates are arranged on both sides of the heating tube according to the air inlet direction, which will not take up too much space and there is no need to make too many modifications to the structural arrangement of the air duct shell. It has strong applicability and enables a small electric heater to still maintain a small product shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the splitting of the present invention;

[0014] Figure 3 It is a schematic diagram of the working principle of the heat exchanger of the present invention. DETAILED DESCRIPTION

[0015] Reference Figures 1 to 3 An electric heater includes a casing 1, a heat exchanger 2 in the casing 1 and a blowing module 3, wherein the blowing module 3 includes an impeller 31 and an impeller base 32, the heat exchanger 2 includes an air duct shell 21 connected to the impeller base 32 and a heating module 4 disposed in the air duct shell 21.

[0016] The heating module 4 includes a heating lamp tube 41, and guide plates 42 are arranged on both sides of the heating lamp tube 41. A heating chamber 5 is formed between the guide plates 42 on both sides to surround the heating lamp tube 41, so that the radiant heat of the heating lamp tube 41 is limited in the heating chamber 5, reducing the loss of radiant heat, so that the heating lamp tube 41 can concentrate on heating the area near the heating chamber 5, and the temperature around the heating lamp tube 41 will rise rapidly, and the air drawn in by the blowing module will immediately mix with the heat to form hot air and be able to immediately reach a very high temperature, thereby realizing high-efficiency conversion of the heat exchanger.

[0017] The guide plates 42 on both sides are arranged front and back according to the air outlet direction of the air duct shell 21 to block the wind sucked in by the blowing module 3 to prevent the wind from directly blowing on the heating lamp tube to generate turbulence and noise, and an air vent 51 for the heating chamber 5 is left between the guide plates 42. When the wind blows through the two sides of the heating chamber 5 and forms a negative pressure at the air vent 51 under the principle of atmospheric pressure, the heat in the heating chamber 5 is brought out and mixed with the wind to form hot air. The outer surface of the guide plate 42 has a guiding function, mainly because a raised outer surface must be provided on the guide plate 42 near the air inlet of the air duct shell 21, and arranged in front of the heating tube along the air inlet direction, so that the incoming air can be guided to the two sides of the heating chamber 5 for rapid passage, thereby reducing the noise generated by the friction with the wind, and the guide plate 42 is preferably configured as a plate with a "V"-shaped cross-section, and the guide plates 42 on both sides are symmetrically arranged, with their sharp corners arranged outwardly to form a "<>" streamlined structure; full use is made of aerodynamics, which greatly reduces wind resistance, thereby reducing the occurrence of turbulence, and achieving the purpose of guiding and reducing wind noise.

[0018] On the other hand, the guide plates 42 are arranged on both sides of the heating lamp tube 41 according to the air inlet direction of the air duct shell 21, which will not take up too much space and does not require much modification to the structural layout of the air duct shell 21. It has strong applicability and allows small electric heaters to still maintain a small product shape.

[0019] Preferably, in order to make full use of the internal space of the casing 1 and reduce the size of the entire machine, the electrical components are arranged on the sides of the blowing module 3 and the heat exchanger 2, and a partition 43 is provided above the air vent on the side of the heating chamber 5 facing the electronic control module to block the radiation of the heating lamp and prevent the side wall of the air duct housing 21 on the side close to the electrical components from being heated by radiation and the temperature rising and affecting the operation of the electrical components.

[0020] In order to further ensure that the temperature in the heating chamber 5 can be quickly increased, the heating lamp 41 is arranged with two guide plates 42 respectively close to the two sides. The guide plates 42 act as reflective covers, so that the temperature in the heating chamber 5 can be instantly increased, and the working efficiency of the electric heater is higher.

[0021] Preferably, the impeller 31 is a centrifugal impeller, and the impeller base 32 includes a cover body 321 for accommodating the impeller 31. A motor 322 for driving the impeller 31 is provided at the end of the cover body 321, forming a centrifugal fan with the characteristics of large air volume and high wind pressure, so that the hot air from the electric heater can quickly fill the entire room, quickly increase the temperature in the room and keep the human body warm.

Claims

1. An electric heater with a high-efficiency heat exchanger, comprising a housing (1), a heat exchanger (2) in the housing (1), and a blowing module (3), wherein the blowing module (3) comprises an impeller (31) and an impeller base (32), the heat exchanger (2) comprises an air duct housing (21) connected to the impeller base (32), and a heating module (4) disposed in the air duct housing (21), characterized in that: The heating module (4) comprises a heating lamp tube (41), guide plates (42) are arranged on both sides of the heating lamp tube (41), and a heating chamber (5) is formed between the guide plates (42) on both sides to surround the heating lamp tube (41), the guide plates (42) on both sides are arranged front and back according to the air outlet direction of the air duct shell (21), and the outer surface of the guide plate (42) close to the air inlet of the air duct shell (21) is convex and has a guiding function and is arranged in front of the heating tube along the air inlet direction, and a vent (51) of the heating chamber (5) is left between the guide plates (42).

2. The electric heater according to claim 1, characterized in that: The guide plate (42) has a V-shaped cross section, and the guide plates on both sides are symmetrically arranged, with their sharp corners arranged outwards.

3. The electric heater according to claim 1, characterized in that: The blowing module (3) and the heat exchanger (2) are also provided with electrical components on their sides, and a partition (43) is provided above the air vent on one side of the heating chamber (5) facing the electric control module.

4. The electric heater according to claim 1, characterized in that: The heating lamp tube (41) has two guide plates (42) arranged close to two sides.

5. The electric heater according to claim 1, characterized in that: The impeller (31) is a centrifugal impeller, and the impeller base (32) comprises a cover body (321) for accommodating the impeller (31), and a motor (322) for driving the impeller (31) is arranged at the end of the cover body (321).

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