Steam air heater with cyclic heating mechanism

Abstract

The utility model discloses a steam air heater with a circulating heating mechanism, which belongs to the technical field of fan heater design, research and development and comprises a warm air chamber, an air inlet chamber and an air outlet chamber, the air inlet chamber and the air outlet chamber are respectively arranged at two ends of the warm air chamber and communicated with the warm air chamber, and a warm air mechanism used for heating cold air is arranged in the warm air chamber. The warm air mechanism comprises a plurality of steam pipes fixedly arranged in the warm air chamber, air pipes fixedly arranged on the outer sides of the steam pipes in a sleeving mode and communicated with the air inlet chamber and the air outlet chamber, and condensate water pipes fixedly installed in the air inlet chamber and communicated with the steam pipes. A water drainage pipe communicated with the end, away from the steam pipe, of the condensate pipe is fixedly installed on the air inlet chamber, condensate water flows into the condensate pipe and exchanges heat with air entering the air pipe firstly, the heat is fully utilized, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of design and development of air heaters, in particular to a steam air heater with a circulating heating mechanism. Background Art

[0002] Steam heater refers to industrial hot air blower equipment that uses steam as heat medium. It is suitable for steam heating places such as general factories, workshops, gardening greenhouses, farms, drying rooms, large spaces, etc.

[0003] Upon investigation, the Chinese utility model patent with publication number CN209926602U discloses a steam air heater for a power station boiler, comprising a first steam box and a second steam box, the first steam box and the second steam box having first and second bellows fixed to their outer walls on opposite sides by screws respectively, and the first and second bellows having insulation shells fixed to their outer walls on opposite sides by screws, steam pipe jacks being provided on their outer walls on opposite sides of the first steam box and the second steam box, and steam pipes being plugged into the inner walls of the steam pipe jacks, and bellows jacks being provided on their outer walls on opposite sides of the first and second bellows.

[0004] The above-mentioned steam air heater can form a thermal insulation air layer for the air duct, preventing the heat of the gas inside the air duct from being lost prematurely, helping to ensure the temperature of the exhaust air, prolonging the contact time between the air and the steam pipe, and helping to ensure that the air fully absorbs the heat in the steam. However, when the above-mentioned steam air heater is working, the condensed water formed by the condensation of steam still has a very high temperature. This condensed water generally cannot be directly introduced into the heating device to participate in the circulation, and its heat is lost in vain, resulting in a waste of energy.

[0005] Therefore, the utility model provides a steam heater with a circulating heating mechanism to solve the above problems. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] The utility model provides a steam air heater with a circulation heating mechanism, aiming to solve the problems mentioned in the background technology that the condensed water formed by the condensation of steam in the existing steam air heater when working still has a very high temperature, the condensed water generally cannot be directly introduced into the heating device to participate in the circulation, the heat is lost in vain, and energy is wasted.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steam heater with a circulating heating mechanism, comprising a warm air chamber, an air inlet chamber and an air outlet chamber respectively arranged at two ends of the warm air chamber and connected to the warm air chamber, an air inlet opened on a side of the air inlet chamber away from the warm air chamber and an air outlet arranged on the air outlet chamber; a warm air mechanism for heating cold air is arranged inside the warm air chamber; the warm air mechanism comprises a plurality of steam pipes fixedly arranged inside the warm air chamber, an air duct fixedly sleeved on the outside of the steam pipe and connected to the air inlet chamber and the air outlet chamber, and a condensate pipe fixedly installed in the air inlet chamber and connected to the steam pipe, a drain pipe connected to one end of the condensate pipe away from the steam pipe is fixedly installed on the air inlet chamber; an air inlet pipe and an exhaust pipe connected to the steam pipe are respectively fixedly installed on the warm air chamber and the air outlet chamber, and condensate flows into the condensate pipe and first exchanges heat with air entering the air duct, so that the heat is fully utilized and energy is saved.

[0010] Preferably, the condensation water pipe is arranged in a spiral shape, which can increase the contact area with the cold air and improve the heating efficiency.

[0011] Preferably, the warm air mechanism also includes heat dissipation fins spirally welded to the periphery of the steam pipe, and the periphery of the heat dissipation fins is fixedly connected to the inner wall of the air duct. The heat dissipation fins arranged between the steam pipe and the air duct can dissipate the heat of the high-temperature steam in the steam pipe to the air duct more efficiently, while increasing the air flow distance, thereby greatly improving the heating effect.

[0012] Preferably, the inner walls of the warm air chamber are all affixed with thermal insulation panels to isolate the heating environment from the outside world and reduce heat loss.

[0013] Preferably, the end of the steam pipe close to the air inlet chamber is lower than the end of the steam pipe close to the air outlet chamber, which can facilitate the condensed water to flow into the condensed water pipe under the action of gravity.

[0014] Preferably, the drain pipe is provided with a pressure valve that controls the flow rate according to the water pressure, the pressure valve includes a valve body arranged on the drain pipe and connected to the drain pipe at both ends, a fixing plate fixedly arranged in the valve body and provided with a water hole, a water blocking plate arranged in the water hole and slidably connected to the fixing plate, and a spring fixedly arranged inside the valve body, the two ends of the spring are respectively fixedly arranged on the water blocking plate and in the valve body at one end away from the condensate water pipe, the water blocking plate is provided with a fine water hole for a small amount of condensate water to pass through, and the pressure valve can control the flow rate of condensate water in the condensate water pipe.

[0015] (III) Beneficial effects

[0016] The steam heater is provided with a spiral condensation water pipe, and the condensation water flows along the condensation water pipe. The air entering the air duct first flows through the condensation water pipe and exchanges heat with the condensation water, so that the heat is fully utilized and energy is saved.

[0017] The steam heater is provided with a pressure valve so that when less condensed water is generated, more condensed water can be stored in the spiral water pipe, and when more condensed water is generated, the condensed water can be quickly discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall elevation view of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure inside the air duct of the utility model;

[0021] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0022] Figure 5 This is a schematic diagram of the structure of the pressure valve of the utility model.

[0023] In the figure: 1. air inlet chamber; 11. air inlet; 2. warm air chamber; 21. air inlet pipe; 3. air outlet chamber; 31. air outlet; 32. exhaust pipe; 4. warm air mechanism; 41. steam pipe; 42. air duct; 43. condensate pipe; 44. drain pipe; 45. cooling fin; 5. pressure valve; 51. valve body; 52. fixing plate; 53. water blocking plate; 54. spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] The utility model provides a steam heater with a circulating heating mechanism, referring to Figures 1 to 4, including a warm air chamber 2, an air inlet chamber 1 and an air outlet chamber 3 respectively arranged at both ends of the warm air chamber 2 and connected to the warm air chamber 2, an air inlet 11 opened on a side of the air inlet chamber 1 away from the warm air chamber 2 and an air outlet 31 arranged on the air outlet chamber 3; a warm air mechanism 4 for heating cold air is arranged inside the warm air chamber 2; the warm air mechanism 4 includes a plurality of steam pipes 41 fixedly arranged inside the warm air chamber 2, an air duct 42 fixedly sleeved on the outside of the steam pipe 41 and connected to the air inlet chamber 1 and the air outlet chamber 3, and a condensate pipe 43 fixedly installed in the air inlet chamber 1 and connected to the steam pipe 41, a drain pipe 44 connected to one end of the condensate pipe 43 away from the steam pipe 41 is fixedly installed on the air inlet chamber 1; an air inlet pipe 21 and an exhaust pipe 32 connected to the steam pipe 41 are fixedly installed on the warm air chamber 2 and the air outlet chamber 3, respectively.

[0027] When the steam heater is working, air is blown in from the air inlet 11 at one end of the air inlet chamber 1, enters the air duct 42 and the warm air chamber 2 from one end of the air duct 42, is heated in the air duct 42, then flows into the air outlet chamber 3, and finally blows out from the air outlet 31. The high-temperature steam used as a heating tool is emitted from the generating device, enters the steam pipe 41 through the air inlet pipe 21, exchanges heat in the steam pipe 41, a part of the high-temperature steam forms condensed water, and the remaining low-temperature steam flows to the steam recovery device through the exhaust pipe 32, and after being processed, enters the steam generating device again to be heated into high-temperature steam, which circulates and heats the device. The high-temperature steam condenses to form The condensed water flows along the steam pipe 41 to one end near the condensed water pipe 43, where the condensed water still has a very high temperature. The condensed water flows along the condensed water pipe 43, and the air entering the air duct 42 first flows through the condensed water pipe 43 to exchange heat with the condensed water, so that the heat is fully utilized and energy is saved. On the other hand, especially when the ambient temperature is low, the air that has not been preheated directly enters the air duct 42, which will cause a large temperature difference between the inside and outside of the steam pipe 41. The different degrees of thermal expansion inside and outside the steam pipe 41 can easily cause damage to the structure of the steam pipe 41. Preheating can greatly extend the service life of the device.

[0028] The condensation water pipe 43 is arranged in a spiral shape, which can increase the contact area with the cold air and improve the heating efficiency.

[0029] The warm air mechanism 4 also includes heat dissipation fins 45 which are spirally welded to the periphery of the steam pipe 41. The periphery of the heat dissipation fins 45 is fixedly connected to the inner wall of the air duct 42. The heat dissipation fins 45 arranged between the steam pipe 41 and the air duct 42 can dissipate the heat of the high-temperature steam in the steam pipe 41 to the air duct 42 more efficiently, while increasing the flow distance of the air, thereby greatly improving the heating effect.

[0030] The inner walls of the warm air chamber 2 are all affixed with heat-insulating panels to isolate the heating environment from the outside world and reduce heat loss.

[0031] The end of the steam pipe 41 close to the air inlet chamber 1 is lower than the end of the steam pipe 41 close to the air outlet chamber 3 , which can facilitate the condensed water to flow into the condensed water pipe 43 under the action of gravity.

[0032] Example 2

[0033] Different from Example 1, a pressure valve 5 for controlling flow according to water pressure is provided on the drain pipe 44, and the pressure valve 5 includes a valve body 51 arranged on the drain pipe 44 and connected to the drain pipe 44 at both ends, a fixing plate 52 fixedly arranged in the valve body 51 and provided with a water hole, a water blocking plate 53 arranged in the water hole and slidably connected to the fixing plate 52, and a spring 54 fixedly arranged inside the valve body 51, and the two ends of the spring 54 are respectively fixedly arranged on the water blocking plate 53 and an end of the valve body 51 away from the condensate pipe 43, and the water blocking plate 53 is provided with a fine water hole for a small amount of condensate to pass through.

[0034] The pressure valve 5 can control the flow of condensed water. When less condensed water is generated, the condensed water is discharged through the fine water holes at a slower speed. The amount of water passing through the pressure valve 5 is less, and more condensed water is stored in the condensed water pipe 43 to heat the air. When more condensed water is generated, a large amount of condensed water accumulates. At this time, the water pressure on the pressure valve 5 increases, and the water blocking plate 53 is compressed by the spring 54. The water blocking plate 53 is staggered with the fixed plate 52, and the condensed water is quickly discharged from the water holes on the fixed plate 52 to avoid blocking the steam conveying pipe or even flowing into the pipe.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steam air heater with a circulating heating mechanism, comprising a warm air chamber (2), an air inlet chamber (1) and an air outlet chamber (3) respectively arranged at two ends of the warm air chamber (2) and connected to the warm air chamber (2), an air inlet (11) provided on a side of the air inlet chamber (1) away from the warm air chamber (2) and an air outlet (31) provided on the air outlet chamber (3); a warm air mechanism (4) for heating cold air is provided inside the warm air chamber (2); Features: The warm air mechanism (4) comprises a plurality of steam pipes (41) fixedly arranged inside the warm air chamber (2), an air pipe (42) fixedly sleeved on the outside of the steam pipe (41) and connected to the air inlet chamber (1) and the air outlet chamber (3), and a condensate pipe (43) fixedly installed in the air inlet chamber (1) and connected to the steam pipe (41); a drain pipe (44) connected to one end of the condensate pipe (43) away from the steam pipe (41) is fixedly installed on the air inlet chamber (1); An air inlet pipe (21) and an air outlet pipe (32) connected to the steam pipe (41) are fixedly mounted on the warm air chamber (2) and the air outlet chamber (3), respectively.

2. A steam heater with a circulating heating mechanism according to claim 1, characterized in that: The condensed water pipe (43) is configured in a spiral shape.

3. A steam heater with a circulating heating mechanism according to claim 1, characterized in that: The warm air mechanism (4) further comprises a heat dissipation fin (45) welded in a spiral shape to the periphery of the steam pipe (41), and the periphery of the heat dissipation fin (45) is fixedly connected to the inner wall of the air pipe (42).

4. The steam air heater with a circulating heating mechanism according to claim 1, characterized in that: The inner walls of the warm air chamber (2) are all affixed with thermal insulation boards.

5. The steam heater with a circulating heating mechanism according to claim 1, characterized in that: An end of the steam pipe (41) close to the air inlet chamber (1) is lower than an end of the steam pipe (41) close to the air outlet chamber (3).

6. The steam air heater with a circulating heating mechanism according to claim 1, characterized in that: The drain pipe (44) is provided with a pressure valve (5) for controlling the flow rate according to the water pressure. The pressure valve (5) comprises a valve body (51) arranged on the drain pipe (44) and connected to the drain pipe (44) at both ends, a fixing plate (52) fixedly arranged in the valve body (51) and provided with a water through hole, a water blocking plate (53) arranged in the water through hole and slidably connected to the fixing plate (52), and a spring (54) fixedly arranged inside the valve body (51), wherein both ends of the spring (54) are respectively fixedly arranged on the water blocking plate (53) and in the valve body (51) at one end away from the condensate pipe (43), and the water blocking plate (53) is provided with a fine water hole for a small amount of condensate to pass through.

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