CN113251706A

CN113251706A - Evaporator

Info

Publication number: CN113251706A
Application number: CN202110155615.1A
Authority: CN
Inventors: 马丁·费格尔
Original assignee: Mahle International GmbH
Current assignee: Mahle International GmbH
Priority date: 2020-02-07
Filing date: 2021-02-04
Publication date: 2021-08-13
Also published as: US20210247111A1; DE102020201557A1

Abstract

The present invention relates to an evaporator having a heat transfer core with a plurality of tubes and a plurality of fins, wherein the tubes are flowable by a first fluid and the tubes and the fins are flowable by a second fluid for heat transfer between the first fluid and the second fluid; the evaporator has at least one collecting tank which is in fluid connection with the tubes, wherein at least two collecting chambers are formed by the at least one collecting tank, wherein one of the collecting chambers is equipped with a first fluid connection tube as an injection tube for supplying the first fluid and the other collecting chamber of the collecting chambers is equipped with a second fluid connection tube as a suction tube for discharging the first fluid, wherein a support element is fastened to the at least one fluid connection tube for mounting an expansion valve on the at least one of the fluid connection tubes.

Description

Evaporator

Technical Field

The present invention relates to an evaporator for a refrigerant cycle, in particular for a motor vehicle refrigerant cycle.

Background

An evaporator of an air conditioning system having a refrigerant circuit is generally designed such that the evaporator has two evaporator connection pipes, namely an injection pipe and a suction pipe. Here, the injection pipe is used for supplying the refrigerant and the suction pipe is used for discharging the refrigerant.

An expansion valve is fixed to the evaporator in order to depressurize the injected refrigerant before the evaporator inlet. Accordingly, the expansion valve is mounted to the injection pipe and to the suction pipe and is fluidly connected to at least the injection pipe. Here, the mounting is effected at least by a support plate which is fastened to the injection pipe and to the suction pipe. If the expansion valve is mounted on the injection pipe and optionally on the suction pipe, the expansion valve can be connected by means of the bearing plate and thus reliably fixed and supported on the injection pipe and on the suction pipe.

Here, the support plate is only loosely arranged on the two evaporator connecting pipes, i.e. the injection pipe and the suction pipe, since the fixing of the expansion valve can take place in the workshop of the evaporator manufacturer immediately after the support plate has been arranged and no complicated handling of the evaporator with a loose support plate is required.

However, there is also a partial desire that the expansion valve is not installed by the evaporator manufacturer, but rather by the motor vehicle manufacturer on the assembly line, since the vehicle manufacturer wants to be able to cope more flexibly with the refrigerant used, for example, to select the expansion valve in conformity with the refrigerant and therefore to select and install it on site on the assembly line. Here, however, the vehicle manufacturer wishes to prepare the mounting of the carrier plate, since this mounting step is considered to be complicated on the assembly line and therefore unnecessarily increases the outlay on the assembly process.

Disclosure of Invention

The object of the present invention is to provide an evaporator which can be produced cost-effectively and nevertheless allows a reliable and simple installation of the expansion valve even elsewhere, for example by a third party.

This object is solved by the following features.

One embodiment of the present invention is directed to an evaporator having a heat transfer core with a plurality of tubes and a plurality of fins, wherein the tubes are capable of being flowed through by a first fluid and the tubes and fins are capable of being bypassed by a second fluid for heat transfer between the first fluid and the second fluid; the evaporator also has at least one collecting tank which is fluidically connected to the tubes, wherein at least two collecting chambers are formed by the at least one collecting tank, wherein one of the two collecting chambers is equipped with a first fluid connection line as an injection line for supplying a first fluid and the other of the two collecting chambers is equipped with a second fluid connection line as a suction line for discharging the first fluid, wherein a support element is fastened to the at least one fluid connection line for mounting the expansion valve on the at least one of the fluid connection lines. It is thus achieved that the support element, which is designed as a support plate, for example, can be preassembled quickly and easily and still not fall off during transport of the evaporator. Accordingly, the expansion valves may be installed in sequence, for example, on the assembly line of the motor vehicle or elsewhere in a third party.

It is also advantageous if the support element is fixed to the two fluid connection pipes in order to mount the expansion valve on the two fluid connection pipes. A stable arrangement and fixing is thus possible, since the bearing element, for example as a bearing plate, can be supported simultaneously on both fluid connection pipes. It is thus achieved that the support element does not shift or fall off, for example during transport.

It is also expedient for the support element to be fastened in a form-fitting manner to both fluid connection pipes and to be fastened in a friction-fitting manner to at least one of the fluid connection pipes. A secure fastening is thus also achieved, in particular because a multipoint contact can be achieved, in particular by using a form-locking and/or friction-locking connection.

It is also expedient for the bearing element to be supported in a frictionally locking manner by means of an elastic element on one of the fluid connection lines. A friction-locking connection can thus be achieved which is reliable in comparison with a connection which uses a form closure.

It is particularly advantageous if the spring element is provided as an open or closed ring element and is arranged so as to be compressible between the support element and the projection of the one fluid connection pipe. The support element can thus be used for clamping the support element on the basis of its elastic properties.

It is also expedient if the fluid connection pipe has two projections, wherein the support element can be arranged between the two projections such that, on the one hand, it rests against one of the two projections and, on the other hand, the spring element can be arranged in a compressed manner between the support element and the other projection, so that the spring element rests against the support element and the other projection. A reliable arrangement and fixing is thus also achieved.

Advantageously, the spring element is designed as a flat element, which can be placed at least partially around the fluid connection tube. The spring element is pre-bent here, so that it can be placed more easily around the fluid connection pipe and is also supported there, for example, on the basis of its own prestress.

It is also expedient for the spring element to have a flat body and projecting elements which project from the flat body. These projecting elements serve to support the support element in a frictionally engaged manner on the fluid connection tube.

It is also particularly advantageous if the projection elements are designed as point-like and/or linear projection elements. Locally improved friction is thus produced, wherein the diversified arrangement of the projecting elements allows a greater range of reliable positions of the supporting elements.

Here, it is also advantageous if the linear projecting elements are designed as straight or curved linear elements, in particular as straight linear elements, sinusoidal linear elements, wavy linear elements, etc. This also results in an improved range of reliable positions of the support element.

It is also preferred that the support element has two open receptacles, wherein one receptacle receives one fluid connection tube and the other receptacle receives the other fluid connection tube. The support element can be simply placed and fixed by the open receptacle. Preferably, the two open receptacles open at an angle of approximately 90 °, which prevents the occurrence of a situation in which the support element can slide away from its position.

Furthermore, it is advantageous in one embodiment if the spring element arranged adjacent to one of the projections is arranged adjacent to one of the receptacles. The spring element can thus be pressed well against one of the projections of the fluid connection tube for a frictional connection with the bearing element.

It is also expedient for the spring element, which is arranged at least partially around the fluid connection tube, to be accommodated in the receptacle by the support element and to be surrounded by the support element. It is therefore possible to press a projection of the projections of the fluid connection pipe well for the frictional connection with the support element.

Drawings

The invention is explained in detail below on the basis of at least one exemplary embodiment with the aid of the figures of the drawing. In the drawings:

figure 1 shows a schematic view of a fluid connection pipe of an evaporator with a support element for an expansion valve,

figure 2 shows a view of a fluid connection tube with a support element,

figure 3 shows a cross-sectional view of a fluid connection tube with an elastic element for supporting the bearing element,

figure 4 shows a cross-sectional view of a fluid connection tube with an elastic element for supporting the bearing element,

figure 5 shows a cross-sectional view of a fluid connection tube with an elastic element for supporting the bearing element,

figure 6 shows a schematic view of a pattern of protruding elements of the elastic element,

figure 7 shows a schematic view of another pattern of protruding elements of the elastic element,

FIG. 8 shows a schematic view of a further pattern of protruding elements of the elastic element, an

Fig. 9 shows a schematic view of an evaporator.

Detailed Description

The present invention relates to an evaporator 1, as schematically shown in fig. 9. The evaporator 1 shown has a heat transfer core 2, the heat transfer core 2 having a plurality of tubes 3 and a plurality of fins 4. The tubes 3 and the fins 4 are preferably arranged alternately here, but they can also be arranged in other arrangements.

The tubes 3 are flowed through by a first fluid 5, wherein the tubes 3 and the fins 4 are flowed around by a second fluid 6, so that heat transfer takes place between the first fluid 5 and the second fluid 6.

The evaporator 1 has at least one collecting tank 7, which is in fluid connection with the tubes 3, wherein at least two collecting chambers 8 are formed by the at least one collecting tank 7. The exemplary embodiment of fig. 9 has two collecting tanks 7, wherein one of the two collecting tanks 7 is divided into at least two collecting chambers 8 by at least one internal separating wall, not shown. The other collecting tank 7 may have only one collecting chamber 8 or may be divided into a plurality of collecting chambers 8 by at least one partition.

One of the collecting chambers 8 of the first collecting tank 7 is here equipped with a first fluid connection pipe 9 as an injection pipe for supplying the first fluid 5. Furthermore, the other one of the collecting chambers 8 of the same collecting tank 7 is equipped with a second fluid connection tube 10 as a suction tube for discharging the first fluid 5.

Fig. 1 shows the parts of the

fluid connection tubes

9, 10 on their respective tube ends 11, 12.

As can be seen in fig. 1, the

fluid connection pipes

9, 10 have annular flanges 13 at positions close to the pipe ends 11, 12, and an O-ring 14 is fitted on each of the pipe ends 11, 12, which O-ring 14 bears against the flange 13. The flange 13 and the O-ring 14 serve to sealingly connect the

fluid connection pipes

9, 10 to an expansion valve for connection to a refrigerant circuit, not shown.

In order to be able to connect and fix the expansion valve to the

fluid connection pipes

9, 10, a support element 15 is provided on both

fluid connection pipes

9, 10, which support element 15 is fixed to at least one of the

fluid connection pipes

9, 10.

Preferably, the support element 15 is fixed to both

fluid connection pipes

9, 10.

In fig. 1 and also in fig. 2, it can be seen that the support element 15 is fastened to both

fluid connection pipes

9, 10 in a form-fitting manner and that the support element 15 is also fastened to at least one of the

fluid connection pipes

9, 10, in this case to the fluid connection pipe 9, in a friction-fitting manner.

For this purpose, a support element, which can preferably be designed as a support plate, is arranged between the two

flanges

13, 16, the two

flanges

13, 16 being arranged at a distance from one another on the fluid connection tube 9. Furthermore, an elastic element 17 is provided between the support element 15 and one of the two

flanges

13, 16, which elastic element 17 produces a frictional connection between the first flange 13 and the support element 15. Here, the spring element 17 acts on the bearing element 15 so that it bears against the flange 16 and the spring element 17 is itself elastically pretensioned between the bearing element 15 and the flange 13.

Alternatively, the elastic element 17 can also be used to produce a frictional connection between the support element 15 and the flange 16 or the support element 15 and the fluid connection tube 9 itself.

Accordingly, the bearing element 15 is supported in a friction-locking manner on one of the

fluid connection lines

9, 10 by means of the spring element 17.

In the embodiment of fig. 1, the elastic element 17 is designed and arranged as an open or closed ring element, so that it can be arranged compressible between the bearing element 15 and the projection in the one

fluid connection tube

9, 10. The projection is here a flange 13 or alternatively also a flange 16.

According to fig. 1, the fluid connection tube 9 has two projections as the

flanges

13, 16, wherein the support element 15 can be arranged between the two projections (for example the flanges 13, 16) such that, on the one hand, the spring element 17 rests against the two projections, i.e. one of the

flanges

13, 16, and, on the other hand, the spring element 17 can be arranged in a compressed manner between the support element 15 and the other projection (for example the flanges 13, 16), so that the spring element rests against the support element 15 and the other projection.

Fig. 3 also shows the arrangement of the fluid connection tube 9 with the

flanges

13, 16 and the spring element 17 before the support element 15 is arranged.

As can be seen from fig. 2, the support element 15 has two

open receptacles

18, 19, wherein one receptacle 18 receives one fluid connection tube 9 and the other receptacle 19 receives the other fluid connection tube 10. The two

receptacles

18, 19 are oriented in such a way that they are open to the side as open receptacles, in order to be able to insert the respective

fluid connection tube

9, 10 into the

receptacle

18, 19 or to put the support element 15 onto the

fluid connection tube

9, 10. The

receptacles

18, 19 are open at 90 ° offset in this case. The receptacle 18 opens out towards the longitudinal edge 20 of the support element 15, while the receptacle 19 opens out towards the transverse edge 21 of the support element 15.

According to fig. 1, the spring element 17 arranged adjacent to one of the

projections

13, 16 is also arranged adjacent to one of the

receptacles

18, 19 of the support element 15.

As an alternative to the embodiments of fig. 1 to 3, fig. 4 and 5 show two further alternative embodiments, in which the elastic element 17 is designed as a flat surface, the elastic element 17 being able to be placed at least partially around the fluid connection 9. The spring element 17 can be flat or also pre-bent.

According to fig. 4 and 5, the elastic element 17 is designed with a planar body 22 and protruding elements 23, which protruding elements 23 protrude from the planar body 22.

According to fig. 4 and 5 and 6 to 8, the projecting elements 23 can be designed as point-like and/or line-like elements.

Fig. 4, 6 and 7 show that the projecting element 23 is designed as a linear element. They can be designed here as straight linear elements 23, as in fig. 6, or as curved linear elements 23, as in fig. 7, i.e. curved linear elements. The curved linear elements 23 can be designed, for example, as sinusoidal linear elements or as linear elements in the form of waves.

Fig. 8 shows an arrangement of punctiform projecting elements 23. These elements may be designed to be round, angular, etc. They may also be arranged in a quadrilateral or hexagonal or octagonal configuration or in other ways.

If the support element 15 is used in the arrangement of fig. 4 or 5, the elastic element 17, which is placed at least partially around the fluid connection tube 9, is accommodated by the support element 15 in the receptacle 18 and is surrounded by the support element 15.

List of reference numerals

1 evaporator

2 Heat transfer core

3 pipe

4 fin

5 first fluid

6 second fluid

7 collecting box

8 collecting chamber

9 first fluid connecting pipe

10 second fluid connecting pipe

11 pipe end

12 pipe end

13 Flange

14O-shaped ring

15 support element

16 Flange

17 elastic element

18 accommodating part

19 accommodating part

20 longitudinal edges

21 transverse edge

22 body

23 element

Claims

1. An evaporator (1) having a heat transfer core (2), the heat transfer core (2) having a plurality of tubes (3) and a plurality of fins (4), wherein the tubes (3) are flowable by a first fluid (5) and the tubes (3) and the fins (4) are flowable by a second fluid (6) for heat transfer between the first fluid (5) and the second fluid (6); the evaporator has at least one collecting tank (7), wherein the collecting tank (7) is in fluid connection with the tubes (3), wherein at least two collecting chambers (8) are formed by the at least one collecting tank (7), wherein one of the collecting chambers (8) is equipped with a first fluid connection tube (9) as an injection tube for supplying the first fluid (5) and the other collecting chamber of the collecting chambers (8) is equipped with a second fluid connection tube (10) as a suction tube for discharging the first fluid (5), characterized in that a support element (15) is fastened to the at least one fluid connection tube for attaching an expansion valve to the at least one of the fluid connection tubes (9, 10).

2. Evaporator (1) according to claim 1, characterized in that for mounting the expansion valve to the two fluid connection pipes (9, 10), the support element (15) is fixed to the two fluid connection pipes (9, 10).

3. Evaporator (1) according to claim 1 or 2, characterized in that the supporting element (15) is fixed in a form-locking manner to the two fluid connection pipes (9, 10) and in a friction-locking manner to at least one of the fluid connection pipes (9, 10).

4. Evaporator (1) according to claim 1 or 2, characterized in that the bearing element (15) is supported on one of the fluid connection pipes (9, 10) in a friction-locking manner by means of an elastic element (17).

5. An evaporator (1) as in claim 4, characterized in that the elastic element (17) is provided as an open or closed ring element and is arranged compressible between the support element (15) and the projection of the one fluid connection tube (9, 10).

6. Evaporator (1) according to claim 5, characterized in that the fluid connection tube (9, 10) has two projections, wherein the bearing element (15) can be arranged between the two projections such that, on the one hand, the bearing element (15) bears against one of the two projections and, on the other hand, the spring element (17) can be arranged in a compressed manner between the bearing element (15) and the other projection, so that the spring element (17) bears against the bearing element (15) and the other projection.

7. Evaporator (1) according to claim 4, characterized in that the elastic element (17) is designed as a planar element which can be placed at least partially around the fluid connection tube (9, 10).

8. Evaporator (1) according to claim 7, characterized in that the elastic element (17) has a planar body (22) and a protruding element (23), the protruding element (23) protruding from the planar body (22).

9. Evaporator (1) according to claim 8, characterized in that the protruding elements (23) are designed as point-like and/or line-like protruding elements.

10. Evaporator (1) according to claim 9, characterized in that the wire-shaped protruding elements (23) are designed as straight or curved linear elements, in particular as straight linear elements, sinusoidal linear elements, wave-wire shaped linear elements.

11. Evaporator (1) according to claim 5, characterized in that the support element (15) has two open receptacles (18, 19), wherein one receptacle (18) accommodates one fluid connection tube (9, 10) and the other receptacle (19) accommodates the other fluid connection tube (9, 10).

12. An evaporator (1) as in claim 11, characterized in that the elastic element (17) disposed adjacent to the one of the projections is disposed adjacent to one of the receptacles (18, 19).

13. Evaporator (1) according to claim 11, characterized in that the elastic element (17) placed at least partially around the fluid connection tube (9, 10) is receivable by the support element (15) in the receptacle (18, 19) and is wrappable by the support element (15).