CN210399521U - Air heat exchanger for gas intermittent combustion type hot air blower - Google Patents

Air heat exchanger for gas intermittent combustion type hot air blower Download PDF

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Publication number
CN210399521U
CN210399521U CN201921029980.2U CN201921029980U CN210399521U CN 210399521 U CN210399521 U CN 210399521U CN 201921029980 U CN201921029980 U CN 201921029980U CN 210399521 U CN210399521 U CN 210399521U
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heat exchange
air
exchange tube
heat
heat exchanger
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王洪武
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Enoughsave Liaoning Co ltd
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Enoughsave Liaoning Co ltd
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Abstract

The utility model discloses an air heat exchanger for a gas intermittent combustion type hot air blower, which is characterized in that a heat exchange tube in the heat exchanger is designed into a hyperboloid horizontal water drop shape which is symmetrically arranged from top to bottom, on one hand, the contact area between the heat exchange tube and the air flow of an external heat exchange fan can be increased, the heat exchange area is increased, and the heat exchange rate is improved; on the other hand, according to the Bernoulli hydrodynamics principle, due to the double curved surface structure design of the heat exchange tube, the wind speed of the external heat exchange fan when the wind current flows through the upper and lower double curved surfaces of the heat exchange tube is larger than the entering wind speed when the wind current is just contacted with the heat exchange tube, so that the heat inside the heat exchange tube can be taken away at an accelerated speed, the heat exchange effect is further enhanced, and the heat loss is reduced; the air heat exchanger for the gas indirect combustion type hot air blower has the advantages of simple structure, reasonable design, large heat exchange area, high heat exchange rate, less heat loss and the like.

Description

Air heat exchanger for gas intermittent combustion type hot air blower
Technical Field
The utility model discloses a technical field who relates to the heat exchanger especially relates to a gas intercombustion formula air heat exchanger for air heater.
Background
A gas direct-fired or indirect-fired fan heater is a heating device commonly used by people, wherein an air heat exchanger is one of important components of the heating device.
Because the existing air heat exchanger basically adopts the form of parallel round tubes and straight tubes, see fig. 1 for the heat exchange schematic diagram of the heat exchange tubes in the existing air heat exchanger, wherein, a is the round tube and pipe heat tube, B is the high-temperature flue gas in the pipe heat tube, C is the leeward side, and D is the air current of the heat exchange fan, and can be known from fig. 1: the existing circular tube straight tube structure can cause heat exchange fluid-air to be not in complete contact with the leeward surface of the heat exchange tube A, so that the heat exchange area is reduced, in order to increase the heat exchange area, a plurality of heat exchange tubes need to be arranged in the heat exchanger, the volume and the weight of the heat exchanger are increased, after the volume of the heat exchanger is increased, the air flow sectional area generated by a heat exchange fan can not well cover each heat exchange tube in the heat exchanger, the heat exchange is insufficient, the heat loss is increased, therefore, the heat exchange amount is not increased along with the increase of the heat exchange tubes, the invisible energy waste is caused, and the adverse effect is caused on.
Therefore, how to develop a new heat exchanger to solve the above problems is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses an air heat exchanger for gas indirect combustion formula air heater to at least, solve current air heat exchanger because adopt the pipe straight tube, the heat transfer area of existence is little, the heat transfer is insufficient, leads to the extravagant scheduling problem of energy.
The utility model provides a technical scheme specifically does, a gas intermittent combustion formula air heat exchanger for air heater, this heat exchanger includes: the heat exchange pipe set, the air inlet connector and the air outlet connector;
the heat exchange tube group is composed of a plurality of heat exchange tubes arranged in parallel, the cross section of each heat exchange tube is in a horizontal water drop shape and is surrounded by two curved surfaces which are symmetrically arranged up and down;
the air inlet joint is fixedly sleeved outside the air inlet end of the heat exchange tube set, and the air inlet joint is communicated with the air inlet of each heat exchange tube in the heat exchange tube set;
the air outlet joint is fixedly sleeved outside the air outlet end of the heat exchange tube set, and the air outlet joint is communicated with the air outlet of each heat exchange tube in the heat exchange tube set.
Preferably, each curved surface consists of a windward surface, a transition surface and a leeward surface which are integrally connected in sequence;
the windward side, the transition side and the leeward side are cambered surfaces, the radius corresponding to the leeward side is larger than that corresponding to the transition side, and the radius corresponding to the transition side is larger than that corresponding to the windward side.
Preferably, the windward side of the two curved surfaces is formed by integral punch forming, and the joint of the two windward sides is arc-shaped.
Preferably, the leeward side of one of the curved surfaces and the leeward side of the other curved surface are gradually closed along the symmetry axis, and the closed positions of the two curved surfaces are fixedly connected through single-side welding.
Further preferably, the heat exchange tubes in the heat tube set are staggered front and back.
Preferably, each heat exchange tube is a stainless steel heat exchange tube with a smooth outer side surface.
The utility model provides an air heat exchanger for gas indirect-combustion air heater, through designing the heat exchange tube in the heat exchanger into the hyperboloid horizontal water droplet shape that the longitudinal symmetry set up, on the one hand, can increase the area of contact between this heat exchange tube and the external heat exchange fan wind flow, increase heat transfer area, improve the heat transfer rate; on the other hand, according to the Bernoulli hydrodynamics principle, due to the double curved surface structure design of the heat exchange tube, the wind speed of the external heat exchange fan when the wind current flows through the upper and lower double curved surfaces of the heat exchange tube is larger than the entering wind speed when the wind current is just contacted with the heat exchange tube, so that the heat inside the heat exchange tube can be taken away at an accelerated speed, the heat exchange effect is further enhanced, and the heat loss is reduced.
The utility model provides an air heat exchanger for gas indirect combustion formula air heater has simple structure, reasonable in design, heat transfer area is big, the heat transfer rate is high, calorific loss advantage such as few.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of heat exchange of a heat exchange tube in an air heat exchanger in the prior art;
fig. 2 is a schematic structural view of an air heat exchanger for a gas indirect-combustion hot air blower according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a heat exchange tube in an air heat exchanger for a gas indirect combustion type air heater according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a heat exchange tube in an air heat exchanger for a gas indirect combustion type air heater according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
In order to solve the problems of small heat exchange area, insufficient heat exchange, energy waste and the like of the prior air heat exchanger due to the adoption of a round pipe straight pipe, the embodiment provides an air heat exchanger for a gas indirect-combustion type hot air machine, which is shown in figure 2, the air heat exchanger mainly comprises a heat exchange tube group 1, an air inlet joint 2 and an air outlet joint 3, wherein, the heat exchange tube set 1 is composed of a plurality of heat exchange tubes 11 arranged in parallel, the cross section of each heat exchange tube 11 is in a horizontal water drop shape and is enclosed by two curved surfaces 111 arranged symmetrically up and down, the air inlet joint 2 is fixedly sleeved outside the air inlet end of the heat exchange tube set 1, the air inlet connector 2 is communicated with an air inlet of each heat exchange tube 11 in the heat exchange tube set 1, the air outlet connector 3 is fixedly sleeved outside an air outlet end of the heat exchange tube set 1, and the air outlet connector 3 is communicated with an air outlet of each heat exchange tube 11 in the heat exchange tube set 1.
When the air heat exchanger is used, the air inlet connector 2 is communicated with the combustion chamber, the air outlet connector 3 is communicated with the smoke exhaust chamber, the heat exchange fan is placed on one side of the air heat exchanger, a medium heated after combustion in the combustion chamber enters the air inlet connector 2 to be buffered and then uniformly flows into each heat exchange tube 11 in the heat exchange tube group 1, the heat exchange tubes 11 are heated, at the moment, under the action of the heat exchange fan on one side, referring to fig. 4, when the air flow of the heat exchange fan passes through each heat tube 11, the air flow is in contact with the upper curved surface and the lower curved surface of each heat exchange tube 11, the surface temperature of the heated heat exchange tubes 11 is taken. Compared with the existing circular heat exchange tube, the heat exchange tube has the advantages that the contact area is enlarged, so that the heat exchange area is correspondingly increased, and the heat exchange rate is greatly improved. In addition, due to the double curved surface structure design of the heat exchange tube 11, the wind speed V2 of the external heat exchange fan when the wind current flows through the upper and lower double curved surfaces of the heat exchange tube is greater than the wind speed V1 when the wind current is in contact with the heat exchange tube, so that the heat inside the heat exchange tube can be taken away at an accelerated speed, the heat exchange effect is further enhanced, and the heat loss is reduced.
Experiments prove that: in the prior art, the heat exchange rate of the round tube type heat exchanger is not lower than 90 percent and basically 90 to 92 percent, and the heat exchange rate of the heat exchanger in the embodiment is not lower than 95 percent and basically 90 to 98 percent in test, which is 5 percent higher than the conventional heat exchange rate, and the heat utilization rate is improved by 5 percent.
Referring to fig. 2, for a specific heat exchange tube structure in the heat exchanger provided in this embodiment, each curved surface 111 in the tube heat tube 11 is formed by a windward surface 1111, a transition surface 1112, and a leeward surface 1113 that are integrally connected in sequence, where the windward surface 1111, the transition surface 1112, and the leeward surface 1113 are curved surfaces, a radius corresponding to the leeward surface is greater than a radius corresponding to the transition surface 1112, a radius corresponding to the transition surface 1112 is greater than a radius corresponding to the windward surface 1111, and during a specific experiment, a radius corresponding to the windward surface 1111: radius of transition surface 1112: the corresponding radius of the leeward side 1113 is 113.36: 283.43: 303.27, length of windward side 1111: length of transition surface 1112: length 50.29 of leeward side 1113: 83.55: 66.15, and experiments prove that the heat exchange tube is designed according to the proportion, the heat effect of the tube is optimal,
in order to reduce the wind resistance to the wind flow of the heat exchanger, as an improvement of the technical scheme, the windward sides 1111 of the two curved surfaces 111 in the heat exchange tube 11 are integrally formed by punching, the joint of the two windward sides 1111 is in an arc shape, and the noise can be reduced while the wind resistance is reduced by the arc design.
As a modification of the technical solution, referring to fig. 3, the leeward surface 1113 of one curved surface 111 and the leeward surface 1113 of the other curved surface 111 in the heat exchange tube 11 are designed to be gradually closed along the symmetry axis, and are fixedly connected at the closed position by single-side welding; through the design of above-mentioned gradual closed, enable heat transfer fan wind current abundant with 11 surface contact of heat exchange tube, make the heat transfer more abundant, increase the wind current of wind speed by the curved surface, can form certain pressure to the surface, make heat transfer fan wind current hug closely the surface and pass through, it is more to take away the heat, further improves the heat transfer rate.
In order to avoid the blockage of heat exchange air flow on the heat exchange tube at the front part to the heat exchange tube at the rear part in the heat exchanger and influence the full contact of the heat exchange air flow and the surface of the heat exchange tube, as an improvement of the technical scheme, the heat exchange tubes 11 in the heat tube set 1 are designed to be arranged in a front-back staggered manner.
In order to avoid the influence on the heat exchange rate caused by the wind resistance of the heat exchange wind flow due to the rough outer surface of the heat exchange tube 11, as an improvement of the technical scheme, each heat exchange tube 11 is a stainless steel heat exchange tube with a smooth outer side surface.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims (6)

1. An air heat exchanger for a gas indirect-combustion air heater is characterized by comprising: the heat exchange pipe set (1), the air inlet connector (2) and the air outlet connector (3);
the heat exchange tube set (1) is composed of a plurality of heat exchange tubes (11) which are arranged in parallel, the cross section of each heat exchange tube (11) is in a horizontal water drop shape and is surrounded by two curved surfaces (111) which are symmetrically arranged up and down;
the air inlet connector (2) is fixedly sleeved outside the air inlet end of the heat exchange tube set (1), and the air inlet connector (2) is communicated with the air inlet of each heat exchange tube (11) in the heat exchange tube set (1);
the air outlet joint (3) is fixedly sleeved outside the air outlet end of the heat exchange tube set (1), and the air outlet joint (3) is communicated with the air outlet of each heat exchange tube (11) in the heat exchange tube set (1).
2. The air heat exchanger for the gas indirect combustion type air heater according to claim 1, wherein each curved surface (111) is composed of a windward surface (1111), a transition surface (1112) and a leeward surface (1113) which are integrally connected in sequence;
the windward side (1111), the transition side (1112) and the leeward side (1113) are cambered surfaces, the corresponding radius of the leeward side is larger than the corresponding radius of the transition side (1112), and the corresponding radius of the transition side (1112) is larger than the corresponding radius of the windward side (1111).
3. The air heat exchanger for the gas indirect combustion type air heater according to claim 2, wherein the windward surfaces (1111) of the two curved surfaces (111) are integrally formed by punching, and the joint of the two windward surfaces (1111) is arc-shaped.
4. The air heat exchanger for a gas indirect combustion type hot air blower according to claim 2, wherein the leeward side (1113) of one of the curved surfaces (111) and the leeward side (1113) of the other curved surface (111) are gradually closed along the axis of symmetry and fixedly connected at the closed position by one-side welding.
5. The air heat exchanger for a gas indirect combustion type hot air blower according to claim 1, wherein the heat exchange tubes (11) in the heat tube bank (1) are arranged in a staggered manner in front and rear.
6. The air heat exchanger for the gas indirect-combustion hot-air machine according to claim 1, wherein each heat exchange tube (11) is a stainless steel heat exchange tube having a smooth outer side.
CN201921029980.2U 2019-07-04 2019-07-04 Air heat exchanger for gas intermittent combustion type hot air blower Active CN210399521U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921029980.2U CN210399521U (en) 2019-07-04 2019-07-04 Air heat exchanger for gas intermittent combustion type hot air blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921029980.2U CN210399521U (en) 2019-07-04 2019-07-04 Air heat exchanger for gas intermittent combustion type hot air blower

Publications (1)

Publication Number Publication Date
CN210399521U true CN210399521U (en) 2020-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921029980.2U Active CN210399521U (en) 2019-07-04 2019-07-04 Air heat exchanger for gas intermittent combustion type hot air blower

Country Status (1)

Country Link
CN (1) CN210399521U (en)

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