CN101261057B

CN101261057B - Plate heat exchanger

Info

Publication number: CN101261057B
Application number: CN2008100238796A
Authority: CN
Inventors: 缪君明; 周浩军
Original assignee: JIANGSU BAODE HEAT EXCHANGER EQUIPMENT CO Ltd
Current assignee: Limited by Share Ltd Jiangsu heat exchange equipment
Priority date: 2008-04-18
Filing date: 2008-04-18
Publication date: 2010-07-28
Anticipated expiration: 2028-04-18
Also published as: CN101261057A

Abstract

The invention relates to a plate type heat exchanger, which comprises a set of heat exchange plates which are stacked and over two working substance fluid inlet and outlet channels. The heat exchange plate set consists of a first heat exchange plate, a second heat exchange plate and a third heat exchange plate, and the circumference of the heat exchange plates has the same shape, wherein, a convex plane and a concave plane are respectively extended out from the second heat exchange plate and the third heat exchange plate along the direction of inlet holes; the three heat exchange plates are stacked in turn according to cycle periods of the first heat exchange plate, the second heat exchange plate and the third heat exchange plate, namely a first fluid flow channel with first fluid is respectively arranged between the second heat exchange plate and the first heat exchange plate and between the third heat exchange plate and the first heat exchange plate, and a second fluid flow channel with second fluid is respectively arranged between the first heat exchange plate and the second heat exchange plate and between the first heat exchange plate and the third heat exchange plate; and flow channel sealing faces are arranged on the heat exchange plates. The first fluid flow channel of the plate type heat exchanger is formed by spaced heat exchange plates, thereby variation of the cross-section area is slow; simultaneously throttle holes of the first fluid flow channel and an inlet channel are formed, thereby fluid can be more uniformly distributed into the first fluid flow channel.

Description

Plate type heat exchanger

Technical field:

The present invention relates to a kind of plate type heat exchanger, especially comprise the heat exchanger of a plurality of plate package.

Background technology:

Plate type heat exchanger is to change switch the most efficiently, and the sides adjacent of every heat exchanger space bar generally is the runner of different working medium, and heat or cold exchange when being used for refrigeration working fluid worked.As DE4422178 and WO/94/14021/ all are typical structures of plate type heat exchanger.And for example the basic structure of Chinese patent ZL96198973 also as above-mentioned and provides some schemes on the distribution passage of working medium.

In the plate type heat exchanger field, the import and the outlet of the runner of equidimension are arranged commonly at present, under the bigger situation of single-phase heat exchange or rate-of flow, it is not too obvious distributing uneven problem, and the import of equidimension generally can be satisfied instructions for use with outlet.But in the two-phase heat transfer process, as in concentrated or vaporescence, medium (working medium) then is to infeed and discharge with gas phase with liquid phase, compare gas phase with liquid phase very big specific volume variation has taken place, at much bigger in import department of the flow velocity in exit and pressure drop ratio, when using under the two-phase heat transfer boundary condition, the inlet of equidimension will cause uneven the generation with outlet in two different conduits of plate type heat exchanger.

For avoiding this problem, CN1888805 has proposed a kind of plate type heat exchanger, and in the adjacent heat exchanger plates in opposite directions a throttling arrangement to be set, this device can comprise a ring or a packing ring or integrally formed.It is very expensive that independent ring or packing ring have been proved to be, and install very inconveniently, the throttling arrangement that adjacent one forms in opposite directions is in use to different operating mode underactions, simultaneously under the situation that fluid extends downwards along the ingate, every a plate thickness, the ingate cross-sectional area will change.This frequent variation causes that fluid pressure drop on whole entrance channel direction is excessive, is difficult to distribute equably each runner.In addition, the typical structure of existing plate type heat exchanger also has a deficiency: working medium when runner distributes evaporative phase-change between adjacent heat exchanger plates flow resistance bigger, can influence the efficient of working medium work, thereby influence whole efficiency of heat exchanger.

Summary of the invention:

The objective of the invention is to: the above-mentioned shortcoming that overcomes in the past known plate type heat exchanger, and obtain the plate type heat exchanger that more satisfactory restriction enters fluid, propose a kind of plate type heat exchanger with the very clearly demarcated opening of boundary, when fluid was downward along the ingate, cross-section variation was more slow.And the heat exchanger plates of this plate type heat exchanger can be realized described restriction under the lower situation of the production of plate type heat exchanger and assembly cost.The plate package that is made of at least three kinds of heat exchanger plates is especially proposed, access road place in plate package is provided with throttling arrangement, to solve the fluid problem that is assigned to the runner between heat exchanger plates heterogeneous of access road, particularly in the two-phase heat transfer process, the liquid of phase transformation distributes uneven problem at each runner, can greatly alleviate by the present invention.The object of the invention also is to propose a kind of plate type heat exchanger of multi-level throttle.

Technical scheme of the present invention is: plate type heat exchanger, comprise that one group of heat exchanger plates lamination constitutes, be provided with the above working medium fluid inlet and outlet of two-way passage, this plate package is by first of identical shaped periphery, second, the three or three kind of heat exchanger plates constitutes, wherein the two or three heat exchanger plates extends plane and recessed plane of an epirelief along the ingate direction, these three kinds of heat exchanger plates are with first, second, first, the cycle period of the 3rd heat exchanger plates superposes successively, promptly be provided with the first fluid runner that flows through first fluid between second and first heat exchanger plates and between the 3rd and first heat exchanger plates, being provided with second fluid course that flows through second fluid between first and second heat exchanger plates and between the first and the 3rd heat exchanger plates, the runner sealing surface is arranged on the heat exchanger plates; Particularly be: the epirelief plane 5 of second heat exchanger plates 2, concave surface 7 fit tightly the formation primary sealing area with following concave plane 6, the epirelief plane 8 of the 3rd heat exchanger plates 3 of at interval a heat exchanger plates respectively, and the

plane

20,22 of the

plane

21,23 of second heat exchanger plates 2 or the 3rd heat exchanger plates 3 and adjacent first heat exchanger plates 1 fits tightly the formation secondary sealing area.

Access road 41 is communicated with every layer

first fluid runner

13 or 14, and this is communicated with and has ingate 9 and 10 as required; Also or on second, third heat exchange wooden partition, offer at least one intercommunicating pore 18 and form.This intercommunicating pore has less sectional area, thus the restriction first fluid inflow, make its in the ingate 11 length directions uniform.

First and second heat exchanger plates and first constitutes second seal area with the 3rd heat exchanger plates and promptly pastes mutually by 20,21 or 22,23 and forms, is not entered by between first and second heat exchanger plates and the second fluid course zone that forms between the first and the 3rd heat exchanger plates by the fluid that ingate 11 enters

first fluid runner

13 or 14 with qualification.

First fluid runner the 13, the 14th, by between second, first heat exchanger plates at interval or form between the 3rd, first heat exchanger plates, and at least one connected

pore channel

9,10 that forms first fluid runner and access road 41 in the heat exchanger plates at interval thus.

First seal area is by constituting between the second and the 3rd heat exchanger plates plate.

First seal area is to be made of separately second, third heat exchanger plates of heat exchanger plates, and second seal area is by constituting between adjacent heat exchanger plates first, second or the 3rd, first heat exchanger plates, and second seal area surrounds first seal area.

First seal area, second seal area, first fluid runner and connected pore channel are directed downwards extension along access road.

First seal area, second seal area and first fluid runner extend on the vertical plane of the length of access road 41.

The invention has the beneficial effects as follows: adopt the present invention then not need other part, the first fluid runner is to be formed by separately heat exchanger plates, cross-section variation is more slow, elongated the distance of access road direction cross-section variation thus, form the throttle orifice of first fluid runner and access road simultaneously, reduced the flow through pressure loss of access road of fluid, made the fluid can be assigned with into first fluid runner more equably.The present invention obtains the plate type heat exchanger that more satisfactory restriction enters fluid, and the heat exchanger plates of this plate type heat exchanger can be realized described restriction under the lower situation of the production of plate type heat exchanger and assembly cost.Access road place in plate package is provided with throttling arrangement, to solve the fluid problem that is assigned to the runner between heat exchanger plates heterogeneous of access road, particularly in the two-phase heat transfer process, the liquid of phase transformation distributes uneven problem at each runner, can greatly alleviate by the present invention.

Description of drawings

Fig. 1 is a kind of perspective view of plate type heat exchanger.

Fig. 2 is the cutaway view of a common plate type heat exchanger along the intercepting of the A-A hatching among Fig. 1.

Fig. 3 is according to the plate type heat exchanger of first example of the present invention phantom along the intercepting of the A-A hatching among Fig. 1.

Fig. 4 is according to the phantom of first example of the present invention along the B-B hatching intercepting of Fig. 3.

Fig. 5 is according to the plate type heat exchanger of second example of the present invention phantom along the intercepting of the A-A hatching among Fig. 1.

Fig. 6 according to the plate type heat exchanger of the 3rd example of the present invention along among Fig. 1 the phantom of A-A hatching intercepting.

The specific embodiment

Shown in Figure 1 is a kind of plate type heat exchanger, and it comprises second

heat exchanger plates

2 and 3,4, four fluid interfaces 5,6,7,8 of front and back end plate, the 5, the 6 or 7, the 8th, communicate, and be used for the turnover of two kinds of fluids.

Fig. 2 is the vertical view of the A-A direction of Fig. 1, comprise several heat exchanger plates, plate is provided with through hole, be welded to each other bonding between wherein reaching 11 and 12 between 9 and 10, forming sealing surface, and 10 and 9,12 and 11 form passages, makes first fluid enter to flow through after the

left channel

10 and 9 gap, enter the first fluid runner that heat exchanger plates forms, can not enter right channel owing to 11,12 adhesive seal make first fluid.In like manner, second fluid can not enter left channel, isolate mutually between the first fluid and second fluid thus, can only carry out the heat biography in passage at interval changes, certainly this plate type heat exchanger can have a plurality of entrance and exits, the shape of passage and position also can freely be selected, and bonding can be rubber seal or various ways such as welding soldering, gummed.

Fig. 3 is the first embodiment of the present invention.Heat exchanger plates separately along the ingate direction extend an epirelief plane and a recessed plane, the epirelief plane 5 of second heat exchanger plates 2, concave surface 7 fit tightly the formation primary sealing area with following concave plane 6, the epirelief plane 8 of the 3rd heat exchanger plates 3 of at interval a heat exchanger plates respectively, and the

plane

20,22 of the

plane

First fluid runner

13 or 14 and 41 of access roades offer the runner hole, this runner hole can be directly to set, also can be groove to be set at least one heat exchanger plates primary sealing area place form, see Fig. 4, this little number of perforations and size positions all can be according to the simple changes of the desired restriction of entrance channel, from Fig. 3 as can be seen, limited by 7,8 positions, primary sealing area is an indent along whole access road.So first fluid is when access road extends downwards, the variation length of cross-sectional area is at least 4 heat exchanger plates thickness, greatly improved the resistance drop problem of fluid when extend in the inlet duct, make fluid more balancedly be assigned with into each passage of being separated by, can make simultaneously the maximum plate number of separate unit heat exchanger become big a lot, under the situation of some length and width space boundary, make the use of plate type heat exchanger become possibility.

Because the

heat exchanger plates

2,3 of plate type heat exchanger and described restraint device constitute one, be lower for the manufacturing and the mounting cost of plate type heat exchanger.

Fig. 5 is the second embodiment of the present invention, here by variation first heat exchanger plates 1, and makes it have and the similar structure of the first enforcement side.Heat exchanger plates separately extends plane and recessed plane of an epirelief along the ingate direction, last convex surface 5 on second heat exchanger plates 2, down concave plane 7 fits tightly the formation primary sealing area with following concave plane 6, the epirelief plane 8 of one the 3rd heat exchanger plates 3 at interval respectively, and the

plane

20,22 of the

plane

21,23 of second heat exchanger plates 2 or the 3rd heat exchanger plates 3 and adjacent first heat exchanger plates 1 fits tightly the formation secondary sealing area.Identical with first embodiment,

first fluid runner

13 or 14 and 41 of access roades offer the runner hole, this runner hole can be directly to offer, and also can be groove to be set at least one heat exchanger plates primary sealing area place form.

Fig. 6 is that of the present invention another implemented side, forms similar structure thereby form primary sealing area simultaneously by two heat exchanger plates and adjacent heat exchanger plates separately here.As shown in Figure 6, the epirelief plane 5 of second heat exchanger plates 2, down concave plane 7 fits tightly the formation primary sealing area with following concave plane 6, the epirelief plane 8 of the 3rd heat exchanger plates 3 of two heat exchanger plates at interval respectively, and the

plane

20,22 of the

plane

21,23 of second heat exchanger plates 2 or the 3rd heat exchanger plates 3 and adjacent heat exchanger plates 1 fits tightly the formation secondary sealing area.Identical with first embodiment,

first fluid runner

13 or 14 and 41 of access roades offer the runner hole, this runner hole can directly be offered, also can be groove to be set at least one heat exchanger plates primary sealing area place form, this little number of perforations and size positions all can be according to the simple changes of the desired restriction of entrance channel.

Certainly, the present invention can directly obtain first heat exchanger plates by second heat exchanger plates 2 or the 3rd heat exchanger plates 3, and directly make common heat exchanger by first heat exchanger plates, and not need to increase extra-pay by the simple size that changes punching.

At last; should be understood that; above embodiment only is the more representational example of the present invention; obviously; technical scheme of the present invention is not limited to the foregoing description, and many distortion can also be arranged, all distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention; comprise this integral type throttling arrangement is local or all split into the device of the same form of being made up of several parts, all should think protection scope of the present invention.

Claims

1. plate type heat exchanger, it is characterized in that constituting by one group of heat exchanger plates lamination, plate type heat exchanger is provided with two-way working medium stream socket passage, this heat exchanger plates lamination is by first of identical shaped periphery, second, the three or three kind of heat exchanger plates constitutes, wherein the two or three heat exchanger plates extends plane and recessed plane of an epirelief along the access road direction, and these three kinds of heat exchanger plates are with first, second, first, the cycle period of the 3rd heat exchanger plates superposes successively, promptly by being provided with the first fluid runner that flows through first fluid between second and first heat exchanger plates of above-mentioned cycle period and between the 3rd and first heat exchanger plates, by being provided with second fluid course that flows through second fluid between first and second heat exchanger plates of above-mentioned cycle period and between the first and the 3rd heat exchanger plates by above-mentioned cycle period by above-mentioned cycle period; The runner sealing surface is arranged on the heat exchanger plates, promptly the epirelief plane (5) of second heat exchanger plates (2), down concave plane (7) fits tightly the formation primary sealing area with following concave plane (6), epirelief plane (8) of heat exchanger plates the 3rd heat exchanger plates (3) at interval respectively, and the plane (20,22) of the plane (21,23) of second heat exchanger plates (2) or the 3rd heat exchanger plates (3) and adjacent first heat exchanger plates (1) fits tightly the formation secondary sealing area;

Offer the runner hole between first fluid runner (13,14) and access road (41), this runner hole is groove to be set at the primary sealing area place of at least one heat exchanger plates form;

Constitute first seal area by separately second, third heat exchanger plates of heat exchanger plates, by constituting second seal area between adjacent heat exchanger plates first, second or the 3rd, first heat exchanger plates, and second seal area surrounds first seal area.