CN103201570B

CN103201570B - Evaporator

Info

Publication number: CN103201570B
Application number: CN201180053778.3A
Authority: CN
Inventors: R·普拉德尔; D·拉齐沃莱克; B·赛特
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2010-11-08
Filing date: 2011-10-26
Publication date: 2015-03-18
Anticipated expiration: 2031-10-26
Also published as: DE102010043542A1; EP2638337B1; EP2638337A2; CN103201570A; WO2012062581A2; WO2012062581A3; ES2529667T3

Abstract

The invention relates to an evaporator (1) for a refrigeration unit having a pipe, through which a refrigerant can flow and which has an inlet opening (5) and an outlet opening (7), wherein the pipe has U-shaped baffles with limbs comprising pipe sections (10, 10', 16, 16') which extend parallel to one another and rectilinearly, and wherein the pipe is mounted in passage openings (30) of plate fins (20) which are oriented perpendicularly with respect to the rectilinear pipe sections (10, 10'). A defrost heating means (50) is provided along at least part of the rectilinear pipe sections (10, 10'), and the defrost heating means (50) is guided and mounted in the passage openings (30) of the plate fins (20).

Description

Evaporimeter

The present invention relates to a kind of evaporimeter for refrigerating appliance, especially Domestic refrigerator, have: one there is inlet opening and flow out opening, can the cooled dose of pipe flowed through, wherein, this pipe has the revolution of U-shaped, the revolution of this U-shaped has by being parallel to each other and the pipe leg that formed of linearly extended pipeline section, and wherein, this pipe is supported in the pass through openings of some thin slices.

According to cooling principle, cooling apparatus and refrigeration appliance usually comprise the evaporimeter for expand cooling medium and refrigerated compartment.This evaporimeter tends to freeze.In frostless utensil, the local energy supply on the region tending to freeze of evaporimeter causes defrosting, and asynchronously makes whole refrigerating chamber reach defrosting temperature.Corresponding defroster is known by DE 11 2,004 002 258 T5, and in this defroster, a Defrost heater is installed in the through hole of the muscle of evaporimeter.DE 31 45 445 illustrates another kind of defroster heating, during this defroster heating and heat exchange muscle are in and contact.

Open source literature DE 10 00836 illustrates a kind of evaporimeter, comprises a cooling worm, is wound with heating cable around this cooling worm.

Open source literature WO 2008/001526 A1 illustrates a kind of evaporimeter with thin sheet element.This thin sheet element has the gap for heater.

Patent document US3,285,334 illustrate a kind of heat exchanger comprising thin sheet element.This thin sheet element has some rills, and a pipe is entrapped in these rills.

Open source literature WO 2007/045677 A1 illustrates a kind of evaporimeter with a pipe and some thin slices.In addition, be provided with a resistive element, this resistive element is parallel to this pipe and extends.

First the shortcoming of known solution is heater installation on an evaporator, because there is a certain spacing here in known solution.Evaporimeter also should be able to simply and inexpensively be manufactured in the fabrication process and heater can easily should be taken off under repair.

For starting in the evaporimeter of the refrigerating appliance of described type, this task is solving thus, that is, a Defrost heater along straight line pipeline section at least partially arrange and this Defrost heater be guided and support in the through perforate of thin slice.

According to the present invention, provide a kind of evaporimeter for refrigerating appliance, have one with inlet opening and flow out opening, pipe that the medium that can be cooled flows through.At this, this pipe has the revolution of U-shaped, and the revolution of this U-shaped has by being parallel to each other and the pipe leg that formed of linearly extended pipeline section.This piping support in the pass through openings of some thin slices pointed to perpendicular to described straight line pipeline section and a defroster heating along straight line pipeline section at least partially arrange and this Defrost heater be guided and support in the through perforate of thin slice.Thus, make heater be directly adjacent to this pipe and these two parts are all kept by a guider and pass through openings, this machinery significantly reducing supporting expends.Compared with there is the embodiment of the heater spatially separated, also can save heat-conducting plate separately by this structure.

Further, this defroster heating can in described pivotal side take off from evaporimeter and/or load onto.Therefore, defroster heating can assemble simply in process of production and also easily can be pulled down in order to the object of keeping in repair.

Defroster heating preferably has the revolution of at least one U-shaped, and the revolution of this U-shaped corresponds to the revolution of a U-shaped of pipe and this defroster heating extends and extends along another pipe leg of pipe in the radial direction at second of pipe along a pipe leg of pipe at first of pipe in the radial direction.At this, the second radial direction and the first radial direction have at least 90 difference spent.A kind of profile of pass through openings can be realized by this structure (also can describe in detail) later, even if when defroster heating is not imported into (this such as may occur during manufacture process), what this pipe was also remained on that it determines by this profile should have in position.

Further preferably, the second radial direction and the first radial direction have the difference of 180 degree.Because the section of pipe heating device is positioned on the opposite side of cooling tube respectively like this, the guiding of pipe in pass through openings is modified.In addition, when above defroster heating is positioned at pipe or below, dew can flow out better than when it is roughly positioned at (in the horizontal direction) near pipe.

Defroster heating has the revolution of multiple U-shaped with especially returning musical form, the revolution of these U-shapeds corresponds to the revolution of the U-shaped of pipe, and defroster heating pipe difference in the radial direction pipe leg linearly extend and be different in the pipe leg adjacent respectively of these radial direction at pipe.Thus, the guiding of pipe in pass through openings is then improved by pivotal multiple cycle always.

Further, defroster heating is resistive heating device, because this resistive heating device can manufacture with little cost and load with saving position.

Defroster heating preferably returns has multiple U-shaped zigzag part bently, and these U-shaped zigzag parts are all in a plane.This does not get rid of other zigzag part and is not in where necessary in this plane.By this way, defroster heating is flat assembly, and this assembly in the fabrication process can be stacking well.Because defroster heating does not have king-sized bending stiffness, it does not have undue complicated shape is favourable.

Further, the straight line pipeline section adjacent with inlet opening according to cooling medium stream is provided with defroster heating, and is not provided with defroster heating according to the straight line pipeline section that cooling medium stream is adjacent with flowing out opening.Because confirm, just in time especially freeze at the pipeline section of input side, it is enough that these pipeline sections are installed corresponding heater.

Corresponding cooling apparatus and/or refrigeration appliance comprise an evaporimeter and for activating defroster heating and thus to control device or the adjusting device of evaporimeter deicing.That is, provide a kind of frostless cooling apparatus and in order to deicing, whole utensil need not be heated to the temperature being greater than 0 degree.

The method manufacturing evaporator without frost has the work flow of a manufacture vaporiser body, the pipe of this vaporiser body has some pipeline sections turning round and extend parallel to each other, and this pipe to be kept at its vpg connection by thin slice and to be guided, and in an ensuing installation step, there is revolution and the defroster heating of section that extends parallel to each other and be encased in vaporiser body by the importing campaign in the linearly direction of pipeline section.Because pipe heating device is electric assembly, must be processed carefully and just this pipe heating device is connected with vaporiser body in ensuing procedure of processing in order to avoid the damage on this pipe heating device.

By accompanying drawing, content of the present invention and improvement project thereof are described in more detail below.Accompanying drawing illustrates:

Fig. 1 has the ball view of the evaporimeter of defroster heating,

Fig. 2 be directed in vaporiser body before defroster heating,

Fig. 3 imports the centre position of motion when assembling,

The top view of Fig. 4 thin slice and

Fig. 5 to Fig. 7 defroster heating is relative to the alternate embodiment of the position of evaporator tube.

Fig. 1 illustrates a kind of evaporimeter, and this evaporimeter is such as used in compression mechanism cold.In this cooling principle, by compressor compresses cold-producing medium, heating and cooling agent thus.These heat are discharged in environment by condenser.Subsequently, (liquid) cold-producing medium is guided and release by this way by flow controller to reduce pressure.At this, cold-producing medium evaporates and produces evaporating cold, and this evaporating cold is discharged in surrounding medium by evaporimeter.This surrounding medium is generally the air in space to be cooled, these air or be guided through evaporimeter according to convective principles or by ventilation blower.Finally, cold-producing medium is carried again to compressor, completes coolant circuit thus.According to Fig. 1, the flowing of surrounding medium represents with arrow K.

Current, evaporimeter is implemented as tubular evaparator.Here, the pipe that there is inlet opening 5 and flow out opening 7 is used.This pipe 2 has multiple zigzag part or U-shaped revolution.At this, the revolution of each U-shaped comprises two pipe legs 10 and 10 ', that these pipe legs are implemented as straight line and the pipeline section be parallel to each other, and pivoted member 12 is positioned on their base portion.In the simplest situations, this pivoted member can be consisted of the bending of pipe.Alternatively, also that separate, semicircle the element bent can be connected and especially soldering with pipe leg 10 and 10 '.Because the two ends of pipe leg are the revolution of U-shaped ground all correspondingly, just produce a kind of form of the pipe leg layer be parallel to each other side by side as a result.At this, these pipe legs are not in a plane, but each second pipe leg upwards-namely misplacing in z-direction one according to Fig. 2 is equivalent to the amount of almost twice pipe diameter.That is, two this layers are so mutual stacked, make outflow opening 7 adjacent with inlet opening 5.

In the region of revolution 12, be provided with the thin slice 20 of band pass through openings 25 and 30.When assembling evaporimeter 1, correspondingly bending pipe 2 is moved to thin slice by motion in y-direction.The task of thin slice in the loading of evaporimeter swan-neck 2 is remained on it should to have in position and to give evaporimeter opposing and impact or the mechanical stability of vibration.In addition, during thin slice is directly in pipe and contacts, thus good heat exchange be possible and the surface cooled of thin slice like this for cooling air to be cooled.In principle, it is just much of that the reason for firmness respectively has a thin slice in pivotal two regions.But owing to improving heat trnasfer, on the end in front, (see figure 3) uses five thin slices 20 placed with having Small Distance abreast.Structure is identical respectively for the thin slice at two ends.In addition, in the region that air-flow enters, multiple other thin slice 15 is there is on left side, namely, these thin slices are cooled by the revolution of two U-shapeds, and, improve heat trnasfer from air to be cooled to vaporiser body on the one hand and in addition also for reducing through flow velocity.

According to the pass through openings 25 using top in the thin slice 20 of Fig. 4, the size of these pass through openings is determined like this, the U-shaped of pipe is turned round and can pass their grafting.The pass through openings 30 of bottom also comprises for the pivotal region of interspersed U-shaped, but widens in a different direction, thus defroster heating can be imported into additionally by these pass through openings 30.Therefore, as gone out as shown in Figure 3, the region 54(of defroster heating 50 is in z-direction) be in the top of corresponding pipeline section 10, and the region 54 ' of defroster heating 50 is in the below of pipeline section 10 '.Pass through openings 25 and 30 is closed around ground respectively.

By being incorporated in the identical pass through openings 30 of thin slice 20 with 10 ' with corresponding pipeline section 10 by defroster heating, make defroster heating directly abut on corresponding pipeline section, this produces best defrosting effect.

Fig. 5 to Fig. 7 illustrates different flexible programs, and in these flexible programs, defroster heating can abut in the corresponding U-shaped revolution of pipe.These figure are from seeing to shown in the visual angle, y direction vaporiser body, and wherein, the interconnective circle that two larger round sections represent Guan Er little is the cross section of defroster heating.Fig. 6 representative is according to the installation situation of main embodiment and rotate about 30 degree at this, and here defroster heating abuts on linearly extended pipeline section 10 and 10 ' with different directions.Alternatively, a flexible program of pass through openings can be rectangle, thus according to Fig. 5, pipe heating device abuts on the identical side of pipe.

The embodiment of Fig. 6 is favourable in the fabrication process, in this manufacture process, first pipe and thin slice is plugged in together, and such as mutual soldering in soaking pit subsequently.As can be seen from the geometry of the pass through openings 30 of thin slice 20, by its shape, the U-shaped revolution of pipe is guided well in X-direction and Z-direction.In the embodiment of Fig. 5, although defroster heating also abuts on pipe ideally, defroster heating can just be loaded into after the brazing.This just means, in the embodiment of Fig. 5, pipe has certain interval in z-direction when the time point of soldering, thus can not guarantee this pipe to remain on it should have on position in the fabrication process without problems.Even without the connection carried out from thin slice to pipe, as soldering, the conception of Fig. 6 and Fig. 7 is also favourable, because the vibration of pipe in X-direction or Z-direction is absorbed by thin slice instead of absorbed by defroster heating, this defroster heating has flimsy plastic casing where necessary.

Another alternate embodiment of defroster heating is shown according to Fig. 7.In this case, thin slice has microscler pass through openings, and these pass through openings match with the pivotal outside dimension of pipe, have the part of expansion section for pipe type heating device on right side.Therefore bending pipe is also guided well during manufacture process and before being incorporated into by pipe heating device in its position in X-direction and Z-direction.

List of reference signs

1 evaporimeter

2 pipes

5 inlet openings

7 flow out opening

The straight line pipeline section of 10,10 ' inlet opening side

12 revolutions

The straight line pipeline section of 16,16 ' outflow open side

20 thin slices

The pass through openings on 25 tops

30 (bottom) pass through openings

50 defroster heatings

54,54 ' straightway

56 revolutions

Claims

1. for the evaporimeter (1) of refrigerating appliance, have: one has inlet opening (5) and flows out opening (7), can the cooled dose of pipe flowed through, wherein, this pipe has the revolution of some U-shapeds, the revolution of these U-shapeds has by being parallel to each other and linearly extended pipeline section (10, 10 ', 16, 16 ') the pipe leg formed, and wherein, this pipe is supported in the pass through openings (30) of some thin slices (20), it is characterized in that, one defroster heating (50) is along described linearly extended pipeline section (10, 10 ') setting at least partially and this defroster heating (50) are guided and support in the pass through openings (30) of described thin slice (20), according to the linearly extended pipeline section (10 that cooling medium stream is adjacent with described inlet opening (5), 10 ') described defroster heating (50) is provided with, according to the linearly extended pipeline section (16 that cooling medium stream is adjacent with described outflow opening (7), 16 ') described defroster heating is not provided with.

2. evaporimeter according to claim 1 (1), is characterized in that, described defroster heating (50) can in the side of described revolution (12) take out from described evaporimeter (1) and/or load onto.

3. the evaporimeter (1) any one of the claims, it is characterized in that, described defroster heating (50) has the revolution (52) of at least one U-shaped, the revolution of this U-shaped corresponds to the revolution of a U-shaped of described pipe and this defroster heating (50) extends and extends along another pipe leg (10 ') of pipe in the radial direction at second of pipe along a pipe leg (10) of this pipe at first of pipe in the radial direction, and described second radial direction and described first radial direction have at least 90 difference spent.

4. evaporimeter according to claim 3, is characterized in that, described second radial direction and described first radial direction have the difference of 180 degree.

5. according to the evaporimeter (1) of claim 1 or 2, it is characterized in that, described defroster heating has the revolution (52) of multiple U-shaped with returning musical form, the revolution of these U-shapeds corresponds to the revolution of the U-shaped of described pipe, and this defroster heating this pipe difference in the radial direction pipe leg linearly to extend and in pipe leg adjacent respectively at this pipe, these radial direction are different.

6. require the evaporimeter (1) of 1 or 2 according to profit, it is characterized in that, described defroster heating (50) is resistive heating device.

7. according to the evaporimeter (1) of claim 1 or 2, it is characterized in that, described defroster heating returns the zigzag part with multiple U-shaped bently, and the zigzag part of these U-shapeds is all in a plane.

8., according to the evaporimeter (1) of claim 1 or 2, it is characterized in that, described refrigerating appliance is Domestic refrigerator.

9. cooling apparatus, has an evaporimeter (1) any one of the claims 1 to 8 and for activating described defroster heating and thus to control device or the adjusting device of described evaporimeter deicing.

10. refrigeration appliance, has an evaporimeter (1) any one of the claims 1 to 8 and for activating described defroster heating and thus to control device or the adjusting device of described evaporimeter deicing.