Condensation type heat exchanger with adjustable power

Abstract

The utility model discloses a condensation type heat exchanger with adjustable power, which comprises a shell assembly, a heat exchanger assembly and a heat exchanger assembly, the spiral coil pipe is arranged in the mounting cavity, and a heat exchange cavity is defined between the interior of the spiral coil pipe and the shell assembly; the heat insulation plate is arranged in the spiral coil pipe and can divide the heat exchange cavity into a heating cavity and a preheating cavity which are arranged at an interval in the length direction of the spiral coil pipe; and the adjusting mechanism is connected with the heat insulation plate and is used for driving the heat insulation plate to move in the spiral coil so as to enlarge or reduce the volume of the heating cavity. According to the condensation type heat exchanger of the structure, the heat insulation plate is driven by the adjusting mechanism to move in the spiral coil pipe so as to adjust the size of the heating cavity and the size of the preheating cavity, and therefore the heating power and the heat exchange efficiency of the condensation type heat exchanger are adjusted according to the use requirement and the production debugging requirement, and the adjusting method is very convenient and rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a condensing heat exchanger with adjustable power. Background Art

[0002] An existing condensing heat exchanger includes a housing assembly, a spiral heat exchange coil disposed inside the housing assembly, and a combustion assembly. The combustion assembly generates high-temperature flue gas for heat exchange with the heat exchange coil, so that the high-temperature flue gas heats the water in the heat exchange coil. The high-temperature flue gas flows in the space surrounded by the spiral heat exchange coil, and directly discharges from the flue pipe at the end of the housing assembly after passing through the gap between two adjacent turns of the spiral pipe of the heat exchange coil, resulting in waste of the waste heat of the flue gas. To this end, in the related art, a heat insulation plate is provided inside the heat exchange coil to divide the internal space of the heat exchange coil into a heating chamber and a preheating chamber along its length direction. The flue gas in the heating chamber flows through the gap between two adjacent turns of the spiral pipe and then discharges after flowing into the preheating chamber, and then the preheating chamber is used to preheat the water just entering the heat exchange coil, thereby improving the thermal energy utilization rate.

[0003] Although the setting of the heat insulation plate can improve the heat utilization rate, it also reduces the proportion of the heating chamber in the internal space of the heat exchange coil, thereby restricting the maximum power of the condensing heat exchanger. In actual production, when it is necessary to adjust the heating power of the condensing heat exchanger, it is often necessary to adjust the volumes of the heating chamber and the preheating chamber, so as to increase the heating chamber to increase the heating power and reduce the heating chamber to reduce the heating power. However, the heat insulation plate is often fixed at a preset installation position, which is very troublesome during debugging. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the purpose of the utility model is to provide a condensing heat exchanger with adjustable power by adjusting the position of the heat insulation plate.

[0005] The condensing heat exchanger with adjustable power according to the embodiment of the utility model includes: a housing assembly, the interior of which has an installation cavity; a spiral coil disposed inside the installation cavity, and a heat exchange cavity is defined between the interior of the spiral coil and the housing assembly; a heat insulation plate disposed inside the spiral coil, which can divide the heat exchange cavity into a heating chamber and a preheating chamber that are spaced along the length direction of the spiral coil; an adjusting mechanism connected to the heat insulation plate for driving the heat insulation plate to move inside the spiral coil to increase or decrease the volume of the heating chamber.

[0006] The condensing heat exchanger with adjustable power according to the embodiment of the utility model has at least the following beneficial effects:

[0007] The condensing heat exchanger with the above structure utilizes the adjusting mechanism to drive the heat insulation plate to move within the spiral coil pipe to adjust the sizes of the heating chamber and the preheating chamber, so as to adjust the heating power and heat exchange efficiency of the condensing heat exchanger according to the usage requirements and production debugging requirements. The adjusting method is very convenient and fast.

[0008] In some embodiments of the present utility model, the housing assembly has two end caps respectively arranged opposite to the two ends of the spiral coil pipe, and the adjusting mechanism is arranged between the end cap and the heat insulation plate and drives the heat insulation plate to linearly reciprocate along the length direction of the spiral coil pipe.

[0009] In some embodiments of the present utility model, the adjusting mechanism includes a threaded sleeve and a threaded rod matching with the threaded sleeve. One end of the threaded sleeve is arranged on one of the heat insulation plate and the end cap, the threaded rod is rotatably arranged on the other of the heat insulation plate and the end cap, and the end of the threaded rod extends into the other end of the threaded sleeve to be threadedly connected with the threaded sleeve.

[0010] In some embodiments of the present utility model, the two end caps are respectively a first end cap and a second end cap. The preheating chamber is located between the second end cap and the heat insulation plate. One end of the threaded sleeve is arranged on the inner wall of the second end cap and extends along the horizontal direction. The threaded rod horizontally penetrates through the heat insulation plate to be threadedly connected with the other end of the threaded sleeve. A compression spring with two ends respectively abutted against the heat insulation plate and the second end cap is sleeved outside the threaded rod and the threaded sleeve.

[0011] In some embodiments of the present utility model, the heating chamber is located between the first end cap and the heat insulation plate. The head of the threaded rod is located in the heating chamber. A combustion assembly extending into the heating chamber is arranged on the first end cap. The first end cap is detachably installed on the housing assembly to expose the head of the threaded rod.

[0012] In some embodiments of the present utility model, when the heat insulation plate moves towards the combustion assembly, it can abut against the combustion assembly to prevent the threaded rod from being completely separated from the threaded sleeve.

[0013] In some embodiments of the present utility model, the combustion assembly has a gas delivery pipe member extending into the heating chamber for delivering mixed gas. A limiting sunk hole is concavely arranged on the side wall of the heat insulation plate facing the combustion assembly, and the limiting sunk hole matches the shape of the end of the gas delivery pipe member.

[0014] In some embodiments of the present utility model, the internal space of the spiral coiled pipe is cylindrical. The outer peripheral wall of the heat insulation plate forms a clearance fit with the inner wall of the spiral coiled pipe. The outer peripheral of the heat insulation plate is circumferentially distributed with a plurality of through holes at intervals around its center. Each through hole is provided with one of the threaded rods, and the second end cover is provided with a plurality of threaded sleeves corresponding to the threaded rods one by one.

[0015] In some embodiments of the present utility model, a threaded stud sleeve is formed on the inner wall of the second end cover. The end of the threaded sleeve away from the heat insulation plate is provided with a stud portion screwed into the threaded stud sleeve.

[0016] In some embodiments of the present utility model, the gas pipeline component extends horizontally. A plurality of air outlet holes are formed on the outer peripheral wall of the gas pipeline component along its length direction. An igniter is provided on one side of one end of the gas pipeline component close to the first end cover.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic external view of an embodiment of the condensing heat exchanger with adjustable power of the present utility model;

[0020] Figure 2 is Figure 1 a cross-sectional schematic view of the embodiment;

[0021] Figure 3 is Figure 2 a schematic exploded view of the structure of the embodiment.

[0022] Reference numerals:

[0023] Shell assembly 100; end cover 110; threaded stud sleeve 120; spiral coiled pipe 200; heat exchange cavity 210; heating cavity 211; preheating cavity 212; heat insulation plate 300; limit counterbore 310; through hole 320; adjusting mechanism 400; threaded sleeve 410; threaded rod 420; compression spring 430; combustion assembly 500; gas pipeline component 510; igniter 520; air outlet hole 530. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 by referring to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0025] In the description of the present utility model, it should be understood that with respect to the orientation description, for example, terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0026] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] See Figures 1 to 3 , the power-adjustable condensing heat exchanger of the present utility model includes: a housing assembly 100, which has an installation cavity inside; a spiral coil 200, disposed within the installation cavity, and a heat exchange cavity 210 is defined between the inside of the spiral coil 200 and the housing assembly 100; a heat insulation plate 300, disposed inside the spiral coil 200, which can divide the heat exchange cavity 210 into a heating cavity 211 and a preheating cavity 212 that are spaced along the length direction of the spiral coil 200; an adjusting mechanism 400, connected to the heat insulation plate 300, and used to drive the heat insulation plate 300 to move inside the spiral coil 200 to expand or reduce the volume of the heating cavity 211.

[0029] The condensing heat exchanger with the above structure utilizes the adjusting mechanism 400 to drive the heat insulation plate 300 to move within the spiral coil 200 to adjust the sizes of the heating chamber 211 and the preheating chamber 212, so as to adjust the heating power and heat exchange efficiency of the condensing heat exchanger according to the usage requirements and production debugging requirements. The adjustment method is very convenient and fast. It can be understood that when the adjusting mechanism 400 drives the heat insulation plate 300 to move along the length direction of the spiral coil 200 to expand the volume of the heating chamber 211, the area of direct heat exchange between the flame and the spiral coil 200 increases, which is beneficial to increasing the heating power. At the same time, the volume of the preheating chamber 212 decreases correspondingly, and the utilization rate of the waste heat of the flue gas decreases; on the contrary, when the adjusting mechanism 400 drives the heat insulation plate 300 to move along the length direction of the spiral coil 200 to reduce the volume of the heating chamber 211, the area of direct heat exchange between the flame and the spiral coil 200 decreases, the heating power becomes smaller, and at the same time, the volume of the preheating chamber 212 increases correspondingly, and the utilization rate of the waste heat of the flue gas increases.

[0030] See Figure 1 and Figure 2 , in some embodiments of the present invention, the housing assembly 100 has two end caps 110 respectively arranged opposite to the two ends of the spiral coil 200, and the adjusting mechanism 400 is arranged between the end cap 110 and the heat insulation plate 300 and drives the heat insulation plate 300 to linearly reciprocate along the length direction of the spiral coil 200. It can be understood that arranging the adjusting mechanism 400 between the end cap 110 and the heat insulation plate 300 is beneficial to reducing the manufacturing and assembly difficulty of the adjusting mechanism 400 and also convenient for operating the adjusting mechanism 400. Of course, in other embodiments, the adjusting mechanism 400 can also be replaced by a positioning insert piece connected to the heat insulation plate 300, and the positioning insert piece can be clamped between two adjacent turns of the spiral coil 200.

[0031] See Figure 2 and Figure 3, in some embodiments of the present utility model, the adjusting mechanism 400 includes a threaded sleeve 410 and a threaded rod 420 that cooperates with the threaded sleeve 410. One end of the threaded sleeve 410 is provided on one of the heat insulation plate 300 and the end cover 110, the threaded rod 420 is rotatably provided on the other of the heat insulation plate 300 and the end cover 110, and the end of the threaded rod 420 extends into the other end of the threaded sleeve 410 to be threadedly connected to the threaded sleeve 410. It can be understood that when the user drives the threaded rod 420 to rotate relative to the threaded sleeve 410, the overall length dimension of the threaded rod 420 and the threaded sleeve 410 increases or decreases, so as to drive the heat insulation plate 300 to reciprocate linearly within the spiral coil 200. Moreover, the threaded rod 420 and the threaded sleeve 410 cooperate to drive the movement of the heat insulation plate 300 with relatively high movement accuracy, and micro-adjustments can be realized to improve the adjustment accuracy when adjusting the processing power.

[0032] See Figure 2 and Figure 3 , in some embodiments of the present utility model, the two end covers 110 are respectively a first end cover and a second end cover. The preheating chamber 212 is located between the second end cover and the heat insulation plate 300. One end of the threaded sleeve 410 is provided on the inner wall of the second end cover to extend in the horizontal direction. The threaded rod 420 horizontally penetrates through the heat insulation plate 300 to be threadedly connected to the other end of the threaded sleeve 410. A compression spring 430 with both ends respectively abutted against the heat insulation plate 300 and the second end cover is sleeved outside the threaded rod 420 and the threaded sleeve 410. That is, the threaded rod 420, the threaded sleeve 410, and the compression spring 430 are all located within the preheating chamber 212, avoiding the flame from burning the threaded rod 420, the threaded sleeve 410, and the compression spring 430, which is beneficial to maintaining the stable physical properties of the adjusting mechanism 400. Moreover, the proportion of the preheating chamber 212 in the heat exchange chamber 210 is relatively low, that is, the dimension of the preheating chamber 212 along the length direction of the spiral coil 200 is short, which is beneficial to shortening the length dimensions of the threaded rod 420 and the threaded sleeve 410 and reducing the probability of the threaded rod 420 and the threaded sleeve 410 being distorted. It should be noted that during the process of the threaded rod 420 rotating relative to the threaded sleeve 410, the compression spring 430 is always in a compressed state. Under the action of the compression spring 430, the heat insulation plate 300 remains abutted against the head of the threaded rod 420. Of course, in other embodiments, the threaded rod 420 can be set to only rotate relative to the heat insulation plate 300. For example, a circlip is provided between the smooth rod portion of the threaded rod 420 close to the head and the heat insulation plate 300. In this case, it is also possible to realize the movement adjustment of the heat insulation plate 300 without setting the compression spring 430.

[0033] See Figure 2 and Figure 3, in some embodiments of the present utility model, the heating chamber 211 is located between the first end cap and the heat insulation plate 300. The head of the threaded rod 420 is located in the heating chamber 211. A combustion assembly 500 extending into the heating chamber 211 is provided on the first end cap. The first end cap is detachably installed on the housing assembly 100 to expose the head of the threaded rod 420. It can be understood that after removing the first end cap from the housing assembly 100, the user can insert a screwdriver into the spiral coil 200 to screw the head of the threaded rod 420, and the adjustment method is very convenient.

[0034] See Figure 2 , in some embodiments of the present utility model, when the heat insulation plate 300 moves towards the combustion assembly 500, it can abut against the combustion assembly 500 to prevent the threaded rod 420 from being completely separated from the threaded sleeve 410. It can be understood that when the threaded rod 420 rotates away from the threaded sleeve 410, it is easy for the threaded rod 420 to be completely separated from the threaded sleeve 410, and the above structure can avoid this problem.

[0035] See Figure 3 , in some embodiments of the present utility model, the combustion assembly 500 has a gas delivery pipe member 510 extending into the heating chamber 211 for delivering mixed gas. A limiting sunk hole 310 is concavely provided on the side wall of the heat insulation plate 300 facing the combustion assembly 500, and the shape of the limiting sunk hole 310 matches the shape of the end of the gas delivery pipe member 510. It can be understood that the setting of the limiting sunk hole 310 is beneficial to increasing the moving stroke of the heat insulation plate 300, thereby increasing the adjustment range of the heating power of the condensing heat exchanger. Moreover, when the end of the gas delivery pipe member 510 enters the limiting sunk hole 310, the limiting sunk hole 310 also has a supporting effect on the gas delivery pipe member 510.

[0036] In some embodiments of the present utility model, the internal space of the spiral coil 200 is cylindrical. A clearance fit is formed between the outer peripheral wall of the heat insulation plate 300 and the inner wall of the spiral coil 200. A plurality of through holes 320 are circumferentially distributed around the center of the heat insulation plate 300 at intervals. Each through hole 320 is provided with a threaded rod 420, and the second end cap is provided with a plurality of threaded sleeves 410 corresponding to the threaded rods 420 one by one. In this embodiment, three through holes 320 and threaded rods 420 are provided, which is beneficial to stably supporting the heat insulation plate 300. The intervals between adjacent through holes 320 and adjacent threaded rods 420 are evenly spaced, which is beneficial to force balance.

[0037] See Figure 2 and Figure 3, in some embodiments of the present utility model, a threaded stud sleeve 120 is formed on the inner wall of the second end cover, and a stud portion that is screwed onto the threaded stud sleeve 120 is provided at one end of the threaded sleeve 410 away from the heat insulation plate 300. It can be understood that the threaded sleeve 410 is fixed to the inner wall of the second end cover by combining the stud portion and the threaded stud sleeve 120, avoiding perforating the second end cover and affecting the airtightness of the housing assembly 100, and preventing flue gas leakage.

[0038] See Figure 2 and Figure 3 , in some embodiments of the present utility model, in order to make the spiral coil 200 in the heating chamber 211 receive heat evenly, the gas delivery pipe member 510 extends horizontally, a plurality of air outlet holes 530 are formed on the outer peripheral wall of the gas delivery pipe member 510 along its length direction, and an igniter 520 is provided on one side of one end of the gas delivery pipe member 510 close to the first end cover.

[0039] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0040] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A condensing heat exchanger with adjustable power, characterized in that, Comprising: A housing assembly (100), the interior of the housing assembly (100) having an installation cavity; A spiral coil (200), disposed within the installation cavity, a heat exchange cavity (210) being defined between the interior of the spiral coil (200) and the housing assembly (100); A heat insulation plate (300), disposed within the spiral coil (200), capable of dividing the heat exchange cavity (210) into a heating cavity (211) and a preheating cavity (212) that are spaced apart along the length direction of the spiral coil (200); An adjusting mechanism (400), connected to the heat insulation plate (300), for driving the heat insulation plate (300) to move within the spiral coil (200) to expand or reduce the volume of the heating cavity (211).

2. The power-adjustable condensing heat exchanger according to claim 1, wherein: The housing assembly (100) has two end caps (110) respectively disposed opposite to the two ends of the spiral coil (200), the adjusting mechanism (400) being disposed between the end cap (110) and the heat insulation plate (300) and driving the heat insulation plate (300) to linearly reciprocate along the length direction of the spiral coil (200).

3. The power-adjustable condensing heat exchanger according to claim 2, wherein: The adjusting mechanism (400) includes a threaded sleeve (410) and a threaded rod (420) that mates with the threaded sleeve (410), one end of the threaded sleeve (410) being disposed on one of the heat insulation plate (300) and the end cap (110), the threaded rod (420) being rotatably disposed on the other of the heat insulation plate (300) and the end cap (110), and the end of the threaded rod (420) extending into the other end of the threaded sleeve (410) to be threadedly connected to the threaded sleeve (410).

4. The power-adjustable condensing heat exchanger according to claim 3, wherein: The two end caps (110) are respectively a first end cap and a second end cap, the preheating cavity (212) is located between the second end cap and the heat insulation plate (300), one end of the threaded sleeve (410) is disposed on the inner wall of the second end cap to extend horizontally, the threaded rod (420) horizontally penetrates through the heat insulation plate (300) to be threadedly connected to the other end of the threaded sleeve (410), and a compression spring (430) with both ends respectively abutted against the heat insulation plate (300) and the second end cap is sleeved outside the threaded rod (420) and the threaded sleeve (410).

5. The power-adjustable condensing heat exchanger according to claim 4, wherein: The heating chamber (211) is located between the first end cover and the heat insulation plate (300). The head of the threaded rod (420) is located in the heating chamber (211). A combustion assembly (500) extending into the heating chamber (211) is provided on the first end cover. The first end cover is detachably installed on the housing assembly (100) to expose the head of the threaded rod (420).

6. The power-adjustable condensing heat exchanger according to claim 5, characterized in that: When the heat insulation plate (300) moves towards the combustion assembly (500), it can abut against the combustion assembly (500) to prevent the threaded rod (420) from being completely separated from the threaded sleeve (410).

7. The power-adjustable condensing heat exchanger according to claim 6, characterized in that: The combustion assembly (500) has a gas delivery pipe member (510) for delivering mixed gas extending into the heating chamber (211). A limiting sunk hole (310) is recessed in the side wall of the heat insulation plate (300) facing the combustion assembly (500), and the limiting sunk hole (310) matches the shape of the end of the gas delivery pipe member (510).

8. The power-adjustable condensing heat exchanger according to claim 4, characterized in that: The internal space of the spiral coil (200) is cylindrical. A clearance fit is formed between the outer peripheral wall of the heat insulation plate (300) and the inner wall of the spiral coil (200). A plurality of through holes (320) are circumferentially distributed around the center of the heat insulation plate (300) at intervals. Each through hole (320) is provided with a threaded rod (420). The second end cover is provided with a plurality of threaded sleeves (410) corresponding to the threaded rods (420) one by one.

9. The power-adjustable condensing heat exchanger according to claim 4, characterized in that: A threaded stud sleeve (120) is formed on the inner wall of the second end cover. A stud portion tightened on the threaded stud sleeve (120) is provided at one end of the threaded sleeve (410) away from the heat insulation plate (300).

10. The power-adjustable condensing heat exchanger according to claim 7, characterized in that: The gas delivery pipe member (510) extends horizontally. A plurality of air outlet holes (530) are formed on the outer peripheral wall of the gas delivery pipe member (510) along its length direction. A igniter (520) is provided on one side of one end of the gas delivery pipe member (510) close to the first end cover.

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