CN216770275U

CN216770275U - Sleeve type heat exchanger

Info

Publication number: CN216770275U
Application number: CN202122765134.0U
Authority: CN
Inventors: 佘群; 方文平; 古元勇
Original assignee: Guangdong Jibao Dingchen Electric Appliance Co ltd
Current assignee: Guangdong Jibao Dingchen Electric Appliance Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-06-17
Anticipated expiration: 2031-11-11

Abstract

The utility model relates to a double-pipe heat exchanger, which comprises an inner pipe and an outer pipe, wherein the inner pipe is sleeved in the outer pipe, and a water gap is formed between the inner pipe and the outer pipe; the inner pipe is a hard pipe; the outer tube is a soft tube. The double-pipe heat exchanger is low in processing and assembling difficulty and reliable in performance, and water passing amount is effectively guaranteed.

Description

Sleeve type heat exchanger

Technical Field

The utility model relates to the technical field of heat exchange, in particular to a double-pipe heat exchanger.

Background

In a traditional sleeve-type heat exchanger, an outer pipe and an inner pipe are generally made of hard materials respectively, and a cylindrical gap between the pipes forms a water path; however, the existing processing technology causes a large area contact between the inner pipe and the outer pipe, which causes the area of the water path between the inner pipe and the outer pipe to be reduced, and further affects the water flow. For example, chinese patent CN203744606U discloses an air conditioner heat exchanger, which specifically discloses: the device comprises a spiral outer pipe and an inner pipe sleeved in the spiral outer pipe, wherein two ends of the outer pipe are open, two ends of the inner pipe are sealed, and a first cavity is formed between the inner wall of the outer pipe and the outer wall of the inner pipe; at least one thin tube is sleeved in the inner tube, and both ends of the thin tube penetrate through the seals at both ends of the inner tube and are communicated with the first cavity; a closed refrigerant cavity is formed between the outer wall of the thin tube and the inner wall of the inner tube; a first refrigerant pipe and a second refrigerant pipe which are communicated with the refrigerant cavity and the external space are arranged on the inner pipe close to the two ends; the inner pipe and the thin pipe are both metal pipes with concave-convex undulated pipe walls; the outer pipe is one of a nickel pipe, an aluminum pipe, a steel pipe, a copper pipe, a porcelain pipe and a snakeskin pipe. Obviously, among the current heat exchanger, each body generally adopts metal material to make, in addition in the actual production, because the body has the metal material of stereoplasm to make respectively, so big to special construction's such as spiral processing degree of difficulty, the water route flux between the pipe is less than the design among the actual product, leads to the performance of heat exchanger to be set for more has the deviation. Therefore, further improvements are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide the double-pipe heat exchanger which is low in processing and assembling difficulty, reliable in performance and capable of effectively ensuring water flow.

The purpose of the utility model is realized as follows:

a double-pipe heat exchanger comprises an inner pipe and an outer pipe, wherein the inner pipe is sleeved in the outer pipe, and a water gap is formed between the inner pipe and the outer pipe; the inner pipe is a hard pipe; the outer tube is a soft tube.

The inner tube is made of a material with good heat conductivity, such as metal, ceramic or glass material.

The outer tube is made of a material with weak thermal conductivity, such as: plastic, etc.

A three-way joint is arranged between the end part of the inner pipe and the end part of the outer pipe; and a first connecting end on the three-way joint is connected with the inner pipe in a sealing manner, a second connecting end is connected with the outer pipe in a sealing manner, and a third connecting end on the three-way joint is communicated with the water passing gap.

The inner pipe inner waterway is used for conveying hot water; the water passing gap is used for conveying cold water; the flow of hot water is reciprocal to the flow of cold water.

And a supporting part for supporting the outer pipe to form a water passing gap is arranged between the inner pipe and the outer pipe.

The support part is arranged outside the inner pipe and/or inside the outer pipe.

The pipe group consisting of the inner pipe and the outer pipe is wound in a thread shape, spirally coiled or roundabout in a bow shape.

The utility model has the following beneficial effects:

in the double-pipe heat exchanger, the inner pipe adopts a hard pipe, and the outer pipe adopts a soft pipe; in the processing production, because the outer pipe is soft, the outer pipe can be sleeved after the inner pipe is processed into a required shape, or the original processing technology is adopted, namely the outer pipe and the inner pipe are sleeved with each other and then are processed into a required shape, and the outer pipe is soft, so that the required forming acting force is small and the forming effect is good; when water is supplied, the outer pipe is soft, so that the water pressure can support the outer pipe to form a water supply gap, and the flux of the water supply gap is effectively ensured.

Drawings

Fig. 1 is a perspective view of a double pipe heat exchanger according to a first embodiment of the present invention.

Fig. 2 is a partial sectional view of a double pipe heat exchanger according to a first embodiment of the present invention.

Fig. 3 is a schematic view of a double pipe heat exchanger according to a second embodiment of the present invention.

Fig. 4 is a schematic view of a double pipe heat exchanger according to a third embodiment of the present invention.

Fig. 5 is a sectional view of a double pipe heat exchanger according to a fourth embodiment of the present invention.

Detailed Description

The utility model is further described with reference to the following figures and examples.

Referring to fig. 1 and 2, the double pipe heat exchanger according to the present embodiment includes an inner pipe 1 and an outer pipe 2, the inner pipe 1 is fitted in the outer pipe 2, and a cylindrical gap between the inner pipe 1 and the outer pipe 2 forms a water passage gap 3 for passing water; the inner pipe 1 is a hard pipe; the outer tube 2 is a soft tube. In the double-pipe heat exchanger, an inner pipe 1 adopts a hard pipe, and an outer pipe 2 adopts a soft pipe; in the processing production, because the outer tube 2 is soft, the outer tube 2 can be sleeved after the inner tube 1 is processed into a required shape, or the original processing technology is adopted, namely the outer tube 2 and the inner tube 1 are sleeved with each other and then are processed into a required shape, and because the outer tube 2 is soft, the required forming acting force is small and the forming effect is good; when water is supplied, the outer pipe 2 is soft, so that the water pressure can support the outer pipe 2 to form a water supply gap 3, and the flux of the water supply gap 3 is effectively ensured.

Further, the inner tube 1 is made of a material having good thermal conductivity, such as a metal, ceramic, or glass material; the outer pipe 2 is made of materials with weak heat conductivity, such as plastics, the outer pipe 2 is made of plastics, the production cost can be effectively reduced (the plastics can be processed by adopting a pipe extruding process, compared with the conventional process made of metal, the processing difficulty is low, the material cost is low, the yield is high), the water passage in the inner pipe 1 is used for conveying hot water, the water passage gap 3 is used for conveying cold water, and the flow direction of the hot water is opposite to that of the cold water; in the water passing process, the heat of the hot water in the inner pipe 1 is transferred to the cold water in the water passing gap 3 through the heat of the inner pipe 1, so that the cold water is heated into warm water to fulfill the purpose of heat exchange, and the heat in the heat exchanger can be transferred to the outside through the heat due to the weaker heat conductivity of the outer pipe 2, so that the heat can play a role in heat preservation on one hand, and the scald caused by the overhigh temperature of the side wall of the heat exchanger is avoided on the other hand.

Further, referring to fig. 2, a three-way joint 4 is arranged between the end of the inner tube 1 and the corresponding end of the outer tube 2 (the water inlet end of the inner tube 1 and the water outlet end of the outer tube 2, and/or the water outlet end of the inner tube 1 and the water inlet end of the outer tube 2); a first connecting end 401 on the three-way joint 4 is connected with the outer wall of the inner pipe 1 in a sealing way, a second connecting end 402 is connected with the outer wall of the outer pipe 2 in a sealing way, and a third connecting end 403 is communicated with the water gap 3; the end of the inner pipe 1 is at least partially exposed so as to be connected with a hot water pipe; the third connecting end 403 is a water pipe joint and is used for connecting a cold water pipe, and cold water enters the water passing gap 3 through the third connecting end 403 and the inner cavity of the three-way joint 4.

Further, a pipe group composed of the inner pipe 1 and the outer pipe 2 is wound in a screw shape.

Second embodiment

Referring to fig. 3, the present embodiment relates to a double pipe heat exchanger different from the first embodiment in that: the tube assembly consisting of the inner tube 1 and the outer tube 2 is spirally wound.

The other parts not described are substantially identical to those of the first embodiment and will not be described in detail here.

Third embodiment

Referring to fig. 4, the present embodiment relates to a double pipe heat exchanger different from the first embodiment in that: the pipe group composed of the inner pipe 1 and the outer pipe 2 is in a bow-shaped roundabout shape.

Fourth embodiment

Referring to fig. 5, the present embodiment relates to a double pipe heat exchanger different from the first embodiment in that: a support portion 5 for supporting the outer pipe 2 to form a water passage gap 3 is provided between the inner pipe 1 and the outer pipe 2. So as to avoid the outer wall of the inner pipe 1 from being attached to the inner wall of the outer pipe 2 and further ensure the flux of the water gap 3.

Further, the support portion 5 in this embodiment is a protrusion disposed inside the outer tube 2, and the end of the support portion 5 abuts against the outer wall of the inner tube 1. Besides, the support part 5 can also be a bulge arranged on the outer side of the inner tube 1, and the end part of the support part 5 props against the inner wall of the outer tube 2; the support 5 may also be provided on both the inner tube 1 and the outer tube 2.

Other parts not described above are substantially the same as those of the first embodiment, and are not explained in detail here.

The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the utility model are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, and the utility model is intended to be protected by the following claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A double-pipe heat exchanger comprises an inner pipe (1) and an outer pipe (2), wherein the inner pipe (1) is sleeved in the outer pipe (2), and a water passing gap (3) is formed between the inner pipe (1) and the outer pipe (2); the method is characterized in that: the inner pipe (1) is a hard pipe; the outer pipe (2) is a soft pipe.

2. The double pipe heat exchanger according to claim 1, wherein: the inner tube (1) is made of a heat conducting material.

3. The double pipe heat exchanger according to claim 2, wherein: the inner tube (1) is made of metal, ceramic or glass material.

4. The double pipe heat exchanger according to claim 1, wherein: the outer pipe (2) is made of a heat-insulating material.

5. The double pipe heat exchanger according to claim 1, wherein: the outer tube (2) is made of plastic.

6. The double pipe heat exchanger according to claim 1, wherein: a three-way joint (4) is arranged between the end part of the inner pipe (1) and the end part of the outer pipe (2); and a first connecting end (401) on the three-way joint (4) is connected with the inner pipe (1) in a sealing way, a second connecting end (402) is connected with the outer pipe (2) in a sealing way, and a third connecting end (403) is communicated with the water passing gap (3).

7. The double pipe heat exchanger according to claim 1, wherein: and a supporting part (5) used for supporting the outer pipe (2) to form a water passing gap (3) is arranged between the inner pipe (1) and the outer pipe (2).

8. The double pipe heat exchanger according to claim 7, wherein: the supporting part (5) is arranged on the outer side of the inner pipe (1) and/or the inner side of the outer pipe (2).

9. The double pipe heat exchanger according to claim 1, wherein: the pipe group consisting of the inner pipe (1) and the outer pipe (2) is spirally wound, spirally coiled or roundly bent in a bow shape.