CN100347498C

CN100347498C - Refrigerating appliance comprising two evaporators

Info

Publication number: CN100347498C
Application number: CNB028178181A
Authority: CN
Inventors: A·施滕普夫勒; C·迈尔索菲; R·布拉赫尔特; R·施密德特; M·霍普夫
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2001-09-13
Filing date: 2002-09-10
Publication date: 2007-11-07
Anticipated expiration: 2022-09-10
Also published as: EP1427973A1; CN1610811A; ES2334117T3; DE10145139A1; DE50214028D1; WO2003023297A1; EP1427973B1; ATE449939T1

Abstract

The invention relates to a refrigerating appliance comprising a refrigerant circuit in which a compressor (9) and two evaporators (5, 6) are connected in series and crossed by a refrigerant. The quantity of refrigerant circulating in the refrigerant circuit is measured in such a way that the refrigerant essentially fully evaporates in the evaporator (5) which is arranged further upstream in the refrigerant circuit.

Description

Refrigerating plant with two evaporimeters

Technical field

The present invention relates to a kind of refrigerating plant with refrigerant circulation loop, connected two evaporimeters and a compressor with series system in this loop, cold-producing medium is from wherein flowing through.

Background technology

The refrigerating circuit of such traditional refrigerating plant has a gatherer, can collect cold-producing medium in the mode that compressor operating interrupts in this gatherer, can immediately cold-producing medium be flowed to evaporimeter when compressor moves once more.During the compressor operating of this traditional refrigerating plant, still can wait for a bit of time, in liquid refrigerant arrives an evaporimeter and begin a cool room that is attached to this evaporimeter is freezed.Though for making compressor operating meeting consumed power, can not produce available refrigeration during this period of time.

Summary of the invention

The purpose of this invention is to provide a kind of specification and begin the refrigerating plant that type is stated in the place, thereby when compressor starts is moved, produce refrigeration immediately and therefore improve the thermal efficiency.

In order to achieve the above object, the present invention proposes a kind of refrigerating plant, it has a compressor and an evaporimeter and an evaporimeter that is positioned at downstream position that is positioned at upstream position, these two evaporimeters are connected in the refrigerant circulation loop with series system, cold-producing medium is from wherein flowing through, wherein, the evaporimeter that is positioned at downstream position is used as coolant collector; The refrigerant amount that circulates in the refrigerant circulation loop distributes like this, so that cold-producing medium evaporates basically at the evaporimeter that is positioned at upstream position.

Its meaning is, flows through the evaporimeter of cold-producing medium the sub-fraction of accessible refrigerating capacity when its refrigerating capacity under any circumstance all only accounts for cold-producing medium and flows through first evaporimeter to being positioned at second of downstream position.Can use the evaporimeter in downstream as coolant collector by this cold-producing medium metering method.Consequent result is from as sucking-off cold-producing medium the evaporimeter of gatherer use, the cold-producing medium gasification in this evaporimeter is also freezed whereby immediately during compressor operating.

Evaporimeter is preferably with the differing heights setting, and the evaporimeter that promptly is positioned at upstream position is than the evaporimeter height that is positioned at downstream position.

At the refrigerant line of the evaporimeter that is arranged in upstream position, bigger to the pipeline overwhelming majority gradients of the evaporimeter of downstream position.When refrigerant circulation loop is static, condense in the evaporimeter that the interior cold-producing medium of this pipeline will flow to downstream position like this.In order to make two evaporimeters energy independent operatings, a reversal valve has been installed in the refrigerant circulation loop, utilize this valve evaporimeter and the refrigerant circulation loop that is arranged in upstream position can be broken.

Other features and advantages of the present invention will be provided by the embodiment that describes with reference to the accompanying drawings.

Description of drawings

Fig. 1 is a cutaway view, shows to use refrigerating plant of the present invention;

Fig. 2 is a schematic diagram, shows the refrigerant circulation loop of refrigerating plant among Fig. 1;

Fig. 3 is an enlarged drawing, shows refrigerant circulation loop.

The specific embodiment

Fig. 1 shows the cutaway view of refrigerating plant of band housing 1, and this refrigerating plant has two

inner rooms

3 and 4 that separate by central dividing plate 2, for example refrigerating chamber and standard refrigerating chamber, and

evaporimeter

5 and 6 is installed on the rear wall on respective chamber/chambers door 7 and 8

opposites.Evaporimeter

5 and 6 is by a compressor 9 supply cold-producing mediums, and compressor moves with discontinuous manner according to measured temperature in

inner room

3 and 4.

Fig. 2 has schematically shown the structure of refrigerating plant refrigerant circulation loop among Fig. 1.In this refrigerant circulation loop, the evaporimeter 6 of the inner room 4 that the evaporimeter 5 of the inner room 3 that compressor 9, a heat exchanger 10, position are higher and position are lower connects into the closed circuit of a sealing with series system.The refrigerant amount that circulates in refrigerant circulation loop distributes like this, makes when refrigeration mode lower compression machine moves, if flow of refrigerant arrives the lower evaporimeter 6 in position, the cold-producing medium that then is transported in the higher evaporimeter in position 5 evaporates basically.Though two evaporimeters 5 are connected with series system with 6, mainly are that position higher inner room 3 is cooled.

In order to freeze to the lower inner room 4 in position, the outlet of compressor 10 has connected a reversal valve 11 that has two commutation positions, reversal valve cold-producing medium stream when first commutation position is transported to the inlet of evaporimeter 5, can make evaporimeter 5 and refrigerant circulation loop separate and directly cold-producing medium stream is transported to the inlet of evaporimeter 6 when second commutation position.

Evaporimeter

5 and 6 is made with roll extrusion juncture commonly used, and the material thermal conductivity of evaporator plate is better, and snakelike coolant conduits 12 is tight with the contacts side surfaces of evaporator plate.In the refrigerant line 12, bigger to outlet 14 this part pipeline gradient from the inlet 13 of evaporimeter 5.The cold-producing medium of regelation in evaporimeter 5 can not accumulate in this evaporimeter in the time of can guaranteeing like this that compressor 9 cuts out, but flow in the lower evaporimeter 6 that uses as coolant collector in position.As shown in the figure, the higher evaporimeter 5 in the lower evaporimeter 6 in position and position structurally is identical.

Detect and need refrigeration and compressor 9 moving if be installed in certain temperature sensor (not shown) in

inner room

3 or 4, then these cold-producing mediums will sucking-off from the lower evaporimeter 6 in position.The pressure drop meeting that produces in evaporimeter thus causes the cold-producing medium in it to evaporate and inner room 4 is freezed.No matter detect top inner room 3 still is that bottom inner room 4 needs refrigeration, and this process of refrigerastion all can take place.But have only when needing to freeze in the top inner room 3, generally wish so just can carry out above-mentioned refrigeration, because this needs the regular hour, up to again liquid refrigerant being imported in the evaporimeter 6 for the bottom inner room is freezed.

Fig. 3 shows the auspicious figure of refrigerant circulation loop among Fig. 2 or further improves situation.The refrigerant circulation loop element of having explained among Fig. 1 and Fig. 2 is with same symbolic representation.Come the cold-producing medium of automatic heat-exchanger 10 to arrive reversal valve 11 by a drier 15.The capillary 16 and 17 that constitutes reversal valve 11 outlets is introduced in the inside of return line 18, and this return line will be transported to compressor 9 from the cold-producing medium that has expanded of low evaporimeter 6 outlets in position.Two capillaries are introduced along the outer rim of compressor 9, but because can enter high-pressure refrigerant in these capillaries, so cold-producing medium can not evaporate in capillary basically.When having only the cold-producing medium of expansion to enter in the refrigerant line 12 of

evaporimeter

6 or 5 by

impedance screw

19 or 20, the cold-producing medium in the capillary could evaporate.

Two

evaporimeters

5 and 6 all are furnished with electrical heating elements 21, its effect is thawing and removes the condensed water that air forms in the

inner room

3 and 4 on

evaporimeter

5 and 6 surface, when perhaps the temperature in needing inner room 4 is higher than environment temperature, the refrigeration that produces because of collected cold-producing medium evaporation when on evaporimeter 6, offsetting compressor operating specially.

Claims

1. refrigerating plant, have a compressor (9) and one and be positioned at the evaporimeter (5) of upstream position and the evaporimeter (6) that is positioned at downstream position, these two evaporimeters are connected in the refrigerant circulation loop with series system, cold-producing medium is from wherein flowing through, it is characterized in that the evaporimeter (6) that is positioned at downstream position is used as coolant collector; The refrigerant amount that circulates in the refrigerant circulation loop distributes like this, so that cold-producing medium evaporates basically being positioned at the evaporimeter of upstream position (5).

2. refrigerating plant as claimed in claim 1 is characterized in that, refrigerant circulation loop is not told coolant collector from evaporimeter (5,6).

3 refrigerating plants as claimed in claim 1 or 2 is characterized in that, evaporimeter is with the differing heights setting, and the evaporimeter (5) that promptly is arranged on upstream position is higher than the evaporimeter that is arranged on downstream position (6).

4. as the described refrigerating plant of above-mentioned claim 3, it is characterized in that the evaporimeter (5) that is positioned at upstream position has a refrigerant line (12), the pipeline overwhelming majority gradients to the evaporimeter (6) of downstream position in this pipeline are bigger.

5. refrigerating plant as claimed in claim 1 or 2 is characterized in that, this refrigerating plant has a reversal valve (11), and the evaporimeter and the refrigerant circulation loop that utilize this valve can select to be arranged on upstream position break.