CN220893064U

CN220893064U - Heat exchange device with parallel heat exchange tubes, water heater and waste heat recovery system

Info

Publication number: CN220893064U
Application number: CN202322374220.8U
Authority: CN
Inventors: 郑时红; 赵云鹏; 茅新波
Original assignee: Zhejiang Yifei Technology Co ltd
Current assignee: Zhejiang Yifei Technology Co ltd
Priority date: 2023-09-01
Filing date: 2023-09-01
Publication date: 2024-05-03
Anticipated expiration: 2033-09-01

Abstract

The application relates to a heat exchange device with parallel heat exchange tubes, a water heater and a waste heat recovery system. The heat exchange device comprises a channel through which the medium outside the tube flows, a heat exchanger and flow baffles, wherein the heat exchanger is arranged in the channel, and the flow baffles are arranged in the channel at intervals to form a flow path of the medium outside the tube; the heat exchanger comprises a collecting inlet pipe, a plurality of heat exchange pipes and a collecting outlet pipe, wherein the plurality of heat exchange pipes are arranged between the collecting inlet pipe and the collecting outlet pipe in parallel and transversely penetrate through the flow baffle plate; the collecting pipe and the collecting pipe are coiled and arranged at two ends of the heat exchange pipe. The application has the technical advantages of high heat exchange efficiency, uniform heat exchange and convenient cleaning.

Description

Heat exchange device with parallel heat exchange tubes, water heater and waste heat recovery system

Technical Field

The application relates to a heat exchange device with parallel heat exchange tubes, a water heater and a waste heat recovery system.

Background

The heat exchange device is a heat exchange device commonly used in industry and daily life, such as an air source water heater, a waste heat recovery device and the like. The main problem to be solved urgently in the prior art is how to increase the heat exchange efficiency as much as possible. For the air source water heater, the problem that the water heater cannot be used immediately after being opened and needs to wait for a long time in the prior art can be solved, and the water heater is miniaturized, occupies less space and reduces cost. For a waste heat recovery system in industrial production, the defects of insufficient waste heat recovery, high material cost, large volume and the like in the prior art can be overcome by improving the heat exchange efficiency. Particularly, for low-grade waste heat generated in certain industrial production, the cost performance of recovery is low, so that the problem of low input-output ratio exists for a long time. In order to improve heat exchange efficiency, heat dissipation devices such as fins are generally arranged independently in the prior art, so that the risk of blockage is further increased, and the cleaning cost is increased. In addition, the external medium of the tube and the heat exchange tube in the existing heat exchanger are generally subjected to mixed heat exchange, namely, the external medium of the tube in different temperature ranges is mixed together, and the external medium of the tube is not subjected to sectional concentrated heat exchange according to the temperature, so that the heat exchange effect and the uniformity of heat exchange have larger lifting space. Therefore, there is a need in the art for a heat exchange device that has higher heat exchange efficiency and more uniform heat exchange.

Disclosure of utility model

The application aims to design a heat exchange device with parallel heat exchange pipes, a water heater and a waste heat recovery system, which have the technical advantages of high heat exchange efficiency, uniform heat exchange and convenience in cleaning.

The application relates to a heat exchange device with parallel heat exchange tubes, which comprises a channel through which a medium outside the tubes flows, a heat exchanger and flow baffle plates, wherein the heat exchanger is arranged in the channel, and the flow baffle plates are arranged in the channel at intervals to form a flow path of the medium outside the tubes; the heat exchanger comprises a collecting inlet pipe, a plurality of heat exchange pipes and a collecting outlet pipe, wherein the plurality of heat exchange pipes are arranged between the collecting inlet pipe and the collecting outlet pipe in parallel and transversely penetrate through the flow baffle plate; the collecting pipe and the collecting pipe are coiled at two ends of the heat exchange pipe.

Wherein, the collecting inlet pipe and the collecting outlet pipe are respectively provided with a connecting hole which is connected with the end part of the heat exchanger in a sealing way; an even distribution plate is arranged at the end part of the channel; the flow baffle is provided with a flow disturbing piece; the flow baffle is connected with the inner wall of the channel, and a gap for flowing of medium outside the pipe is formed between the flow baffle and the inner wall of the channel; a 180-degree phase difference exists between the gaps of two adjacent flow baffle plates; the baffle plate is provided with a plurality of through holes, and the heat exchange tube passes through the through holes and is supported on the baffle plate.

The application also relates to a water heater comprising the heat exchange device.

The application also relates to a waste heat recovery system comprising the heat exchange device.

The heat exchange device with the parallel heat exchange tubes, the water heater and the waste heat recovery system have the following technical advantages:

(1) The heat exchange area can be increased and the flow resistance can be reduced by arranging the plurality of heat exchange tubes in parallel between the collecting inlet tube and the collecting outlet tube, and the collecting inlet tube and the collecting outlet tube are coiled at two ends of the heat exchange tubes, so that the fluid entering the parallel heat exchange tubes is more uniform, and the heat exchange device has the technical advantages of high heat exchange efficiency and uniform heat exchange;

(2) The flow paths of the medium outside the tubes and the heat exchange tubes transversely penetrate through the flow baffles, so that the medium outside the tubes entering the channels can exchange heat with the heat exchange tubes of different sections in a concentrated mode according to temperature segmentation, heat exchange is more concentrated and sufficient, and the problems of low heat exchange efficiency and uneven heat exchange caused by mixed heat exchange of the medium outside the tubes of different temperatures are avoided;

(3) The periphery of the baffle plates are connected with the inner wall of the channel, gaps for flowing of the medium outside the tube are formed, and phase differences are formed between the gaps of the adjacent baffle plates, so that the medium outside the tube can sequentially flow through the flow paths between the baffle plates along the gaps, the heat exchange time and the heat exchange paths of the medium outside the tube are prolonged, and the heat exchange efficiency is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of a heat exchange device of the present application.

Fig. 2 is a schematic view of a heat exchanger of the present application.

Fig. 3 is a schematic view of a coiled manifold.

Fig. 4 is a schematic view of a spiral header.

FIG. 5 is a schematic illustration of the placement of notches in adjacent baffles.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other. In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

According to the heat exchange device with parallel heat exchange tubes of the application, as shown in fig. 1, the heat exchange device comprises a channel 1 through which a medium outside the tubes flows, a heat exchanger 2 and baffle plates 3, wherein the heat exchanger 2 is arranged inside the channel 1, and the baffle plates 3 are arranged in the channel 1 at intervals so that the medium outside the tubes can flow along a path formed by the baffle plates 3. The cross-sectional shape of the channel 1 may be circular or square. As shown in fig. 2-3, the heat exchanger 2 mainly comprises an inlet collecting pipe 21, a plurality of heat exchange pipes 22 and an outlet collecting pipe 23, wherein the plurality of heat exchange pipes 22 are arranged between the inlet collecting pipe 21 and the outlet collecting pipe 23 in parallel and are transversely arranged on the baffle plate 3. The heat exchange medium flows in from the collecting pipe 21 and is uniformly distributed in each heat exchange pipe 22, and the heat exchange medium in the plurality of heat exchange pipes 22 is in a parallel flow state; the heat exchange medium flows through the heat exchange tube 22 and then flows out from the collecting pipe 23. As shown in fig. 3-4, the collecting inlet pipe 21 and the collecting outlet pipe 23 are coiled and arranged at two ends of the heat exchange pipe 22 in a spiral or coiled pipe type mode, so that the uniformity of the heat exchange medium entering each heat exchange pipe can be improved, and the overall heat exchange performance of the heat exchanger is more uniform. The collecting pipe 21 and the collecting pipe 23 are provided with a plurality of connecting holes 25, the connecting holes 25 of the collecting pipe 21 are respectively connected with the heat exchange pipe 22 in a sealing way, and the other end of the heat exchange pipe 22 is connected with the connecting holes of the collecting pipe 23 in a sealing way. The external interfaces of the manifold 21 and the manifold 23 may both be provided outside the channel 1 for installation and maintenance.

The channel 1 is preferably made of a material with certain strength and corrosion resistance, and an insulating layer can be applied on the outer surface to prevent energy from being emitted. Preferably, even distribution plates 4 are arranged at two ends of the channel 1, so that the medium outside the tube is kept even when entering and exiting the channel. The distribution plate 4 may be arranged outside the collecting inlet pipe and collecting outlet pipe of the heat exchanger. The medium outside the pipe flows in from the inlet A of the channel 1, uniformly flows through the uniform distribution plate 4, flows in the path formed by the baffle plate 3 and flows out from the outlet B of the channel. The heat exchange medium flows in from the inlet C of the heat exchanger 2 and flows out from the outlet D of the heat exchanger 2 to form an opposite flow path with the medium outside the tube, so that the energy in the heat exchange medium can be sufficiently transferred to the medium outside the tube through the heat exchanger. In the preferred embodiment, the baffle plate 3 may be provided with a turbulence member, and the turbulence member may be in the form of a protrusion, a fin, or the like, so as to enhance turbulence and heat exchange effect when the medium outside the tube flows.

The baffle 3 is made of a material having a certain strength and corrosion resistance, and the size of the baffle 3 is not exactly matched with the size of the heat exchanger 2. A gap is formed between the baffle 3 and the inner wall of the channel 1 so that the medium outside the tube flows through the gap. Except for the notch, the baffle plate 3 is fixed with the inner wall of the channel 1 in a sealing way, so that the medium outside the tube is prevented from directly flowing through the gap between the periphery of the baffle plate 3 and the inner wall of the channel 1, and the heat exchange effect is poor. The gaps on two adjacent baffle plates 3 are staggered to a certain extent when being arranged, so that the heat exchange between the medium outside the tube and the heat exchanger is sufficient. As shown in fig. 5, a schematic view of a circular cross section of the channel is shown, one end of the baffle 3 is provided with a notch, and the other part is circular to be matched and fixed with the inner wall of the circular channel. The two adjacent notches can be arranged with a 180-degree potential difference. The baffle plate 3 has a plurality of through holes 31, and the size of the through holes 31 is matched with the size of the heat exchange tubes 22, so that the heat exchange tubes 22 can pass through the through holes 31 and be supported on the baffle plate 3.

Example 1

The heat exchange device with the parallel heat exchange tubes can be used for water heaters, such as air source water heaters.

Specifically, the liquid flowing in the channel is tap water, the inlet end and the outlet end of the heat exchanger are connected with the air source heat exchanger unit, and the heat exchange medium which absorbs heat in the outside air can heat the tap water in the heat exchanger to generate hot water.

Example 2

The heat exchange device with the parallel heat exchange tubes can be used for a waste heat recovery system for recovering waste heat in waste liquid, waste gas and other waste materials generated in industrial production.

For example, the inlet end and the outlet end of the heat exchanger can be connected with the pump, and the waste heat in the waste liquid or the waste gas is extracted, so that the heat exchange medium after heat exchange has a value of direct use, for example, boiler hot water can be generated to reduce the energy consumption of the boiler. For another example, the heat exchanger may be connected to a pump and a secondary heat exchanger in this order, and the waste heat in the waste liquid or the waste gas is extracted to allow the heat exchange medium to pass through the secondary heat exchanger, thereby converting the waste heat into hot air or hot water. At this time, the heat exchange medium always circulates in the heat exchanger, the pump and the secondary heat exchanger.

For another example, the inlet end and the outlet end of the heat exchanger can be sequentially connected with the pump, the secondary heat exchanger and the valve, the pump can be a compressor, and the heat exchange medium is a refrigerant, so that the waste heat in the waste liquid or the waste gas is drawn by a compression type circulating refrigeration mode, and the heat exchange medium passes through the secondary heat exchanger to convert the waste heat into hot air or hot water. By using the mode, the heat exchange medium flowing in the heat exchanger can be lower than the ambient temperature, so that the temperature of the waste liquid or the waste gas discharged after passing through the waste heat recovery device is close to the temperature of the natural environment, or the temperature of the waste liquid or the waste gas discharged after passing through the waste heat recovery device is lower than the temperature of the natural environment, and the condensation and the collection of partial harmful liquid and gas are realized.

Although the embodiments of the present application are described above, the embodiments are only used for facilitating understanding of the present application, and are not intended to limit the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.

Claims

1. The heat exchange device with the parallel heat exchange tubes comprises a channel through which a medium outside the tubes flows, a heat exchanger and flow baffles, wherein the heat exchanger is arranged in the channel, and the flow baffles are arranged in the channel at intervals to form a flow path of the medium outside the tubes; the heat exchanger is characterized by comprising a collecting pipe, a plurality of heat exchange pipes and a collecting pipe, wherein the plurality of heat exchange pipes are arranged between the collecting pipe and the collecting pipe in parallel and transversely penetrate through the flow baffle plate; the collecting pipe and the collecting pipe are coiled at two ends of the heat exchange pipe.

2. The heat exchange device according to claim 1, wherein the collecting inlet pipe and the collecting outlet pipe are respectively provided with a connecting hole in sealing connection with an end of the heat exchanger.

3. The heat exchange device of claim 1 wherein the ends of the channels are provided with a distribution plate.

4. The heat exchange device of claim 1, wherein the baffle plate is provided with a spoiler.

5. The heat exchange device according to any one of claims 1 to 4, wherein the flow baffle is connected to the inner wall of the passage, and a gap through which the medium outside the tube flows is formed between the flow baffle and the inner wall of the passage.

6. The heat exchange device of claim 5 wherein the notches of two adjacent baffles are 180 degrees out of phase.

7. The heat exchange device according to any one of claims 1 to 4, 6, wherein the baffle plate is provided with a plurality of through holes, and the heat exchange tubes pass through the through holes and are supported on the baffle plate.

8. A water heater comprising a heat exchange device, wherein the heat exchange device is according to any one of claims 1 to 7.

9. Waste heat recovery system comprising a heat exchange device, characterized in that the heat exchange device is according to any one of claims 1-7.