CN214537516U - Liquid heat exchanger with flange plate - Google Patents

Abstract

The utility model discloses a liquid heat exchanger with flange, at least including two end covers, the end cover includes end cover body, ring flange, a plurality of U lumen that directional ordered arranged, the U lumen includes bend and straight lumen, centers on straight lumen sets up the sleeve pipe chamber, and two straight lumen of U lumen are through the bend intercommunication, the end cover body sets up the intercommunication chamber in U lumen bend inboard department, and the intercommunication chamber makes two sets of lumens of U lumen communicate in bend inboard department, the ring flange sets up with straight lumen, the through channel of sleeve pipe chamber adaptation, makes the ring flange of both ends cover seal the concatenation after, by bend and straight lumen form the coolant runner of S-shaped trend, form the only refrigerant runner of circuitous trend by the intercommunication chamber in both ends cover; the end cap is injection molded from metal. The utility model discloses an use metal injection moulding technique on the heat exchanger to the whole shaping of return bend sleeve pipe is solved to simple effectual mode, and the heat transfer effect is excellent, but mass production.

Description

Liquid heat exchanger with flange plate

Technical Field

The utility model relates to a indirect heating equipment technical field, more specifically say, relate to a liquid heat exchanger with ring flange.

Background

The heat exchanger of the existing heat pump water heater and air conditioner mainly comprises a shell, an inner cylinder and a coil pipe, wherein a refrigerant inlet is arranged on the side wall of the shell, and high-speed refrigerant enters an inner cavity of the shell from the side wall of the shell and then exchanges heat with water in the coil pipe. If application number is CN200810069750.9, the name is a heat exchanger's application of the Chinese utility model, its heat exchanger includes the casing, inner tube and coil pipe, the inner tube is established in the casing, the coil pipe is established between inner tube outer wall and shells inner wall, be equipped with a baffle along its cross section in the inner tube, the baffle top is the storage cavity, the baffle below is for storing the liquid chamber, the gas-supply pipe export passes the inner tube top cap and gets into the storage cavity, the inner tube that is located storage cavity side is equipped with a plurality of through-holes that communicate storage cavity and shells cavity, the inner tube that is located the liquid chamber side is equipped with a plurality of intercommunicating pores that communicate liquid chamber and shells cavity, there is the refrigerant output tube its import to be located and store the liquid chamber below. This patent utilizes the cavity of inner tube to do down the buffering, makes the refrigerant spray on the coil pipe surface comparatively evenly to can improve heat transfer effect. Obviously, the heat exchanger in the coil form has a smaller effective heat exchange area than that of the heat exchanger in the sleeve form, the sleeve heat exchanger generally collects the refrigerant and the secondary refrigerant respectively by using collectors at two ends of a plurality of parallel sleeves, but because the length of the sleeves is limited, the heat exchange time is short, so that the heat exchange is insufficient, and the defects of the heat exchanger in the sleeve form are obvious. Therefore, the research and development of a novel liquid heat exchanger is of great significance for improving the efficiency of the heat pump water heater and the air conditioner.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a liquid heat exchanger with ring flange, this heat exchanger divide into two sections at least to through the sealed concatenation of ring flange, its manufacturability is good, can realize the abundant heat transfer of refrigerant and secondary refrigerant, in order to overcome prior art not enough.

The utility model discloses an adopt following technical solution to realize above-mentioned purpose: a liquid heat exchanger with flange plates at least comprises two end covers, wherein each end cover comprises an end cover body, a flange plate and a plurality of U tube cavities which are arranged in an oriented and ordered manner, each U tube cavity comprises a bent tube and a straight tube cavity, a sleeve cavity is arranged around the straight tube cavity, the two straight tube cavities of the U tube cavities are communicated through the bent tube, the end cover body is provided with a communication cavity at the inner side of the bent tube of the U tube cavity, the two tube cavities of the U tube cavities are communicated at the inner side of the bent tube through the communication cavity, the flange plate is provided with a through channel matched with the straight tube cavities and the sleeve cavity, so that after the flange plates of the two end covers are sealed and spliced, a secondary refrigerant flow channel with a reciprocating circuitous advancing direction is formed by the bent tube and the straight tube cavities, and a refrigerant flow channel with a unique reciprocating circuitous advancing direction is formed by the communication cavity in the two end covers; the end cap is injection molded from metal.

And the flange plate is provided with a fastening bolt hole.

And the inner wall surface and the outer wall surface of the cavity wall of the straight cavity are provided with thread-shaped rib grooves.

And a connecting rib is arranged between the cavity wall of the straight cavity and the inner wall of the communicating cavity.

The middle connector comprises a sleeve part and flange parts at two ends of the sleeve part, the flange parts are respectively in sealing connection with flange plates of two end covers, the sleeve part comprises a plurality of sleeves, inner pipes of the sleeves are in adaptive connection with straight pipe cavities of the end covers, and outer sleeve interlayers of the sleeves are communicated with the sleeve cavities of the end covers.

The utility model adopts the beneficial effect that above-mentioned technical solution can reach is:

1) the metal injection molding technology has the advantages of one-time molding of products with complex shapes, high product size precision, no need of machining or only micro-machining and the like, and the product is formed by degreasing and sintering a mixture of metal powder and an organic binder which are subjected to mold injection molding. When the metal injection molding method is used for producing a product, a lateral core-pulling mechanism is not needed in a mold, and a core is gasified in the subsequent heating process, so that the external and internal space shapes of the part manufactured by the metal injection molding method are designed and manufactured more freely, and the hollow, concave or inverted space shapes which cannot be realized by various traditional processing methods can be realized. The end cover, the elbow, the communicating cavity, the straight pipe sleeve and the flange structure part which can enable the topological turning of the double-layer space structure of the sleeve can be manufactured by using a metal injection molding technology, the space turning which can not be communicated with each other can be respectively kept between the inner layer of the inner pipe and the interlayer space of the sleeve in the end cover, the connecting part which completes the double-way turning, such as the end cover, can be integrally formed in one part, the realization of the double-way turning topological structure in the end cover part can be realized only by additive manufacturing, such as 3D printing, except the metal injection molding technology, but the 3D printing method is not suitable for actual mass manufacturing.

2) The sintered product of the metal injection molding technology product has the strength similar to that of the used metal. The application of the metal injection molding technology on the heat exchanger can effectively solve the problem of realizing the manufacture of 180-degree reciprocating steering connecting piece end covers of straight-line sleeve pipelines, realize double-layer pipeline steering space topological structural parts which cannot be realized by the conventional industrial production method, obtain heat exchanger pipeline space arrangement structures which are limited by various industrial production methods produced by the heat exchanger in the past, and greatly expand the sleeve inner layer and interlayer space arrangement structures limited by various existing manufacturing technologies by introducing the metal injection molding technology. The number of the straight-line sleeves can be increased according to needs, the accumulation of the total heat exchange flow length of the sleeves is realized, the change of the number N of the sleeves can be realized by designing and changing the turning number in the end cover according to needs, the realization is only limited by the production capacity of the end cover with the maximum size provided by a metal injection molding method, theoretically, the upper limit is not provided, and the refrigerant among a plurality of end covers and the secondary refrigerant passage can also be continuously connected, so that a new design and manufacturing idea direction is provided for improving the heat exchange efficiency of the heat exchanger. The utility model discloses a curved logical on high-efficient heat exchanger's the end cover, the intercommunication chamber, the straight tube sleeve pipe, the flange, the complicated spatial structure of constitutions such as screw thread shape rib groove, because the needs that double-circuit 180 degrees turned to, so-called "back-off", "cavity", "indent" shape that are difficult to the demolding when its structure must contain useful mould production, only can make through metal injection moulding technology during these structure batch production, produce the heat exchanger with this kind of method, heat exchange efficiency is higher, solve the difficult problem that sleeve pipe heat exchanger heat transfer stroke is short with simple effectual mode, its manufacture craft and product size specification parameter etc. have the huge possibility of gradual optimization as new design manufacturing method yet.

3) The utility model discloses a liquid heat exchanger passes through the concatenation of both ends lid or both ends end cover and middle sleeve pipe sealing connection, by the elbow with the straight tube chamber or the elbow, the straight tube chamber, the inner tube of intermediate connector forms reciprocal circuitous coolant runner that gos forward the trend, the outer tube intermediate layer by each intercommunication chamber sleeve pipe chamber of both ends lid or intermediate connector and the sleeve pipe chamber of end cover, the intercommunication chamber forms the only reciprocal refrigerant runner that gos forward the circuitous trend, thereby to connect each single tube passageway or intermediate layer passageway on both ends end covers side by side with "series connection" mode, make heat transfer pipeline infinitely extend, thereby heat transfer area has been improved, make heat transfer pipeline's efficiency higher.

Drawings

Fig. 1 is a sectional view of the liquid heat exchanger of the present invention.

Fig. 2 is a schematic view of the end flange end face structure of the liquid heat exchanger of the present invention.

Fig. 3 is a schematic view of the flow path of the liquid heat exchanger according to the present invention, and the arrows and the arrow connecting lines in the figure indicate the flow direction.

Detailed Description

The technical solution is described in detail with reference to specific embodiments below.

As shown in fig. 1-3, a liquid heat exchanger with a flange plate comprises a first end cover 1 and a second end cover 2, wherein the first end cover 1 and the second end cover 2 are both composed of an end cover body 10 and a flange plate 11, a plurality of U tube cavities 12 are orderly arranged in the end cover body 10, each U tube cavity comprises a bend 121 and a straight tube cavity 122, a sleeve cavity 123 is arranged around the straight tube cavity, the two straight tube cavities of each U tube cavity are communicated through the bend, a communicating cavity 124 is arranged at the inner side of the bend of the U tube cavity of the end cover body, and the communicating cavity enables the two tube cavities 123 of each U tube cavity on the first end cover 1 and the second end cover 2 to be communicated at the inner side of the bend, so that when the flange plates of the two end covers are oppositely and hermetically spliced, a pipeline of one U tube cavity 12 of the first end cover 1 is correspondingly connected with the U tube cavity 12 of the second end cover 2, and then returns to the other U tube cavities 12 of the first end cover 1, and the process is circulated. In addition to the U-tube chambers 12, an inlet tube 17 and an outlet tube 18 are required to be provided on the first end cap 1 or the second end cap 2, and a refrigerant flow passage inlet tube 171 and a refrigerant flow passage outlet tube 181 are provided adjacent to the inlet tube 17 and the outlet tube 18, respectively, wherein the inlet tube is connected to the first U-tube chamber 12 of the piping flow path, the outlet tube is connected to the last U-tube chamber 12, and both the refrigerant flow passage inlet tube 171 and the refrigerant flow passage outlet tube 181 are communicated with the jacket tube chamber 123. Since the purpose of the heat exchanger is to exchange heat from two different streams of material, the coolant flow path around the straight tube cavity 122 and the elbow 121 must have another flow path in heat exchange relationship therewith. Specifically, a single refrigerant flow channel with a circuitous trend is formed by the sleeve cavity 123 and the communication cavity 124, the direction of the refrigerant flow channel is the same as or opposite to that of the secondary refrigerant flow channel, when the directions of the two are the same, a certain sleeve cavity 123 of the end cover one 1 enters the other sleeve cavity 123 of the U-shaped cavity along the bend 121 of the U-shaped cavity through the communication cavity 124 of the bend, then enters the sleeve cavity 123 of the end cover two 2 along the cavity, and the process is circulated until the heat exchanger leaves from the cavity outlet. The inlet and outlet of the refrigerant flow channel are formed by opening on the first end cover 1 or the second end cover 2 and follow the inlet pipe or the outlet pipe section of the secondary refrigerant flow channel. In order to communicate the pipelines of the two end covers, through channels (111, 112) matched with the straight pipe cavity and the sleeve pipe cavity are arranged on the flange plates of the end covers, so that after the flange plates of the two end covers are sealed and spliced, a secondary refrigerant flow channel with a reciprocating circuitous forward trend is formed in the two end covers by the bend-through 121 and the straight pipe cavity 122, and a unique reciprocating circuitous forward refrigerant flow channel is formed by the sleeve pipe cavity 123 and the communication cavity 124. Because the end cover is internally provided with the U-shaped elbow, the communication cavity 124 and the sleeve cavity 123 are required to be arranged.

The two flanges 11 are welded by sealing or brazing (e.g., salt bath brazing). When in braze welding connection, a braze welding groove 180 is arranged on one flange, a braze welding wire is placed in the groove, and the two are connected in a welding way through a braze welding process. Fastening bolt holes 113 are provided in the flanges, and are fastened by fastening bolts in advance to further perform brazing operation for fastening the end caps.

Furthermore, in order to change the laminar flow of the fluid on the wall of the heat exchange tube, the inner and outer wall surfaces of the wall of the straight tube cavity can be provided with thread-shaped rib grooves (not shown), so that the plane of the tube wall is not smooth, the fluid micelles can not flow in parallel and in layers, and do not interfere and mix with each other, but turbulent flow is promoted, the fluid micelles of the two fluids are mixed and doped strongly, and the movement not only along the main flow direction but also perpendicular to the main flow direction is realized, so that the heat exchange effect is more excellent.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims (5)

1. A liquid heat exchanger with a flange plate is characterized by at least comprising two end covers, wherein each end cover comprises an end cover body, a flange plate and a plurality of U tube cavities which are arranged in an oriented and ordered manner, each U tube cavity comprises a bent through cavity and a straight tube cavity, a sleeve cavity is arranged around the straight tube cavity, the two straight tube cavities of each U tube cavity are communicated through the bent through cavity, the end cover body is provided with a communication cavity at the inner side of the bent through cavity of each U tube cavity, the two tube cavities of each U tube cavity are communicated at the inner side of the bent through cavity through the communication cavity, the flange plate is provided with a through channel matched with the straight tube cavities and the sleeve cavity, and after the flange plates of the two end covers are hermetically spliced, a secondary refrigerant flow channel with an S-shaped trend is formed by the bent through cavities and the straight tube cavities, and a unique circuitous refrigerant flow channel is formed by the communication cavities in the two end covers; the end cap is injection molded from metal.

2. A liquid heat exchanger with a flange plate according to claim 1, wherein the flange plate is provided with fastening bolt holes.

3. The liquid heat exchanger with flange plate of claim 1 or 2, characterized in that the inner and outer wall surfaces of the cavity wall of the straight cavity are provided with thread-shaped rib grooves.

4. The liquid heat exchanger with the flange plate as claimed in claim 3, wherein a connecting rib is arranged between the wall of the straight tube cavity and the inner wall of the communicating cavity.

5. A liquid heat exchanger with a flange plate according to claim 1 or 2, further comprising an intermediate connector, wherein the intermediate connector includes a sleeve portion and flange portions at two ends of the sleeve portion, the flange portions are respectively connected with the flange plates of the two end covers in a sealing manner, the sleeve portion includes a plurality of sleeves, inner tubes of the sleeves are connected with straight tube cavities of the end covers in an adaptive manner, and outer sleeve interlayers of the sleeves are communicated with the sleeve cavities of the end covers.

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