CN111854276A

CN111854276A - Refrigeration device

Info

Publication number: CN111854276A
Application number: CN201910360989.XA
Authority: CN
Inventors: 朱啟武; 朱卫忠; 刘翔宇; 沈贵可; 王宝阳
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-10-30
Anticipated expiration: 2039-04-30
Also published as: CN111854276B; WO2020221635A1

Abstract

The invention provides a refrigeration appliance, comprising: a compartment for storing articles in an environment with a controlled refrigeration temperature; a first evaporator; a second evaporator providing a refrigeration effect to the compartment; a resistance to supply of the refrigerant to the first evaporator is larger than a resistance to supply of the refrigerant to the second evaporator; the dryer is arranged to enable the first evaporator and the second evaporator to obtain approximate balance of liquid refrigerant discharged from the dryer, so that a plurality of evaporators can exert refrigeration effects at the same time, and refrigeration efficiency of refrigerating different compartments at the same time is greatly improved.

Description

Refrigeration device

Technical Field

The invention relates to the technical field of refrigerators, in particular to a household refrigerator.

Background

In general, a refrigeration appliance, such as a refrigerator, adjusts temperature by controlling a high-temperature and high-pressure refrigerant cycle in a refrigeration cycle of the refrigeration appliance itself. The related art refrigerator discloses a refrigeration cycle including a compressor compressing a refrigerant, a condenser radiating heat of the refrigerant, a dryer removing moisture from the refrigerant, and a first evaporator and a second evaporator, etc. arranged in parallel, so that the refrigerant can be controlled to flow to the first evaporator and the second evaporator arranged in parallel at the same time, so that the first evaporator and the second evaporator can simultaneously supply cold air to a freezing chamber or a refrigerating chamber, which can be referred to chinese invention having publication No. CN 100480604C.

Disclosure of Invention

The invention solves the problem that how to balance the supply amount of the refrigerant among a plurality of evaporators in the process of simultaneously refrigerating a plurality of compartments of the refrigerator and simultaneously supplying the refrigerant to the plurality of evaporators so as to ensure the refrigerating efficiency of each compartment.

In order to solve the above problems, the present invention provides a refrigerator including:

a compartment for storing articles in an environment with a controlled refrigeration temperature;

a first evaporator;

a second evaporator providing a refrigeration effect to the compartment; a resistance to supply of the refrigerant to the first evaporator is larger than a resistance to supply of the refrigerant to the second evaporator;

a compressor to raise a pressure of the refrigerant;

a condenser to cool and at least partially condense the refrigerant to a liquid refrigerant;

a dryer to at least partially remove moisture entrained in a refrigerant, the dryer comprising: a drying chamber; a desiccant disposed in the drying chamber to remove moisture from the refrigerant;

an inlet duct in flow communication with the dryer for introducing a refrigerant into the drying chamber;

a first outlet conduit in fluid communication with the dryer to deliver refrigerant in the drying chamber to the first evaporator;

A second outlet conduit in fluid communication with the dryer to deliver refrigerant in the drying chamber to the second evaporator;

and on the basis of the gravity direction, the height of the position, on or in the dryer, of the second inlet of the second eduction pipe is higher than the height of the position, on or in the dryer, of the first inlet of the first eduction pipe.

Thus, the first inlet and the second inlet are arranged at different heights, liquid refrigerant from the dryer enters the first eduction tube through the first inlet preferentially and is conveyed to the first evaporator, and the first evaporator with higher refrigerant supply resistance is ensured to obtain the refrigerant preferentially. Along with the accumulation and increase of the liquid refrigerant in the dryer, the liquid refrigerant can enter the second eduction tube through the second inlet and be conveyed to the second evaporator, so that the first evaporator and the second evaporator obtain the approximate balance of the discharged liquid refrigerant, a plurality of evaporators can simultaneously exert the refrigeration effect, and the refrigeration efficiency of simultaneous refrigeration of different compartments is greatly improved.

Further, a controllable first valve is connected to a flow path between the first lead-out pipe and the first evaporator to control whether to deliver refrigerant to the first evaporator; a controllable second valve is connected in the flow path between the second outlet conduit and the second evaporator to control whether refrigerant is delivered to the second evaporator.

Further, the second inlet of the second outlet pipe and the first inlet of the first outlet pipe being at different heights is configured such that liquid refrigerant preferentially enters the first outlet pipe through the first inlet port during cumulative rising within the drying chamber.

Further, the speed of the compressor is adjustable and is adjusted in relation to the temperature of the compartment.

Further, as the compressor speed increases, the level of liquid refrigerant in the drying chamber also increases and is above the location of the second inlet of the second outlet tube.

After the compressor starts to work, liquid refrigerant gradually appearing in the dryer preferentially enters the first inlet and enters the first outlet pipe, and meanwhile, no liquid refrigerant enters the second inlet and enters the second outlet pipe. If the second evaporator does not receive enough refrigerant, the cooling effect is reduced and the temperature of the compartment gradually increases. Accordingly, the speed of the compressor is gradually increased, the liquid level of the liquid refrigerant in the dryer is gradually increased on the premise of supplying the first evaporator preferentially until the liquid refrigerant at least exceeds the height of the second inlet, and the liquid refrigerant can enter the second inlet and is conveyed to the second evaporator through the second eduction pipe, so that the refrigerating requirement of the compartment is met.

Further, the first outlet pipe and the second outlet pipe respectively extend into the drying cavity.

Further, the outlet of the introducing pipe is positioned below the first inlet of the first eduction pipe and the second inlet of the second eduction pipe by taking the gravity direction as a reference; and the first eduction tube and the second eduction tube vertically extend into the drying cavity from top to bottom respectively.

Further, the outlet of the introducing pipe is positioned above the first inlet of the first eduction pipe and the second inlet of the second eduction pipe by taking the gravity direction as a reference; the first outlet pipe and the second outlet pipe respectively vertically extend into the drying cavity from bottom to top.

Further, the first and second valves may be controlled to the following states:

the first state: the first valve is open and the second valve is closed, liquid refrigerant flows only to the first evaporator;

the second state: the first valve is closed and the second valve is open, and liquid refrigerant flows only to the second evaporator;

the third state: the first valve is opened and the second valve is opened, and liquid refrigerant can flow to the first evaporator and the second evaporator simultaneously.

Further, the refrigerator also comprises another chamber for storing articles, and the first evaporator provides a refrigeration effect for the other chamber; the other compartment is set as a refrigerating compartment; the compartment is set as a freezing compartment; the first evaporator is set as a refrigerating chamber evaporator; the second evaporator is set as a freezing chamber evaporator.

The subject matter of any independent claim above may be combined with any subject matter or combination of subject matter of any dependent claims as may be permitted under the circumstances of technology to form new claimed subject matter.

Drawings

FIG. 1 is a schematic view of a refrigeration system of a refrigerator according to an embodiment of the present invention;

FIG. 2 is a schematic view of an embodiment of an arrangement of refrigerant introduction and withdrawal pipes with respect to a dryer;

FIG. 3 is a schematic view of another embodiment of the arrangement of the refrigerant introduction tube and the withdrawal tube with respect to the dryer;

reference numerals: 100-a refrigerator; 10-a refrigeration system; 11-a first valve; 12-a second valve; 1-a freezing compartment; 2-a cold storage compartment; 4-a compressor; 5-a condenser; 6-a dryer; 61-a housing; 62-a drying chamber; 66-a desiccant; 63-an introduction tube; 631-an outlet; 64-a first outlet pipe; 641-a first inlet; 65-a second outlet pipe; 651-second inlet; 7-a freezer evaporator; 8-refrigerating chamber evaporator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a refrigerator appliance according to an embodiment of the present invention is provided as a side-by-side refrigerator having two storage compartments and independently cooling each. The refrigerator 100 includes a freezing chamber 1, a refrigerating chamber 2, a refrigerating system 10, and a control device (not shown) for controlling the refrigerating system 10. The refrigerating system includes a compressor 4, a condenser 5, an evaporator, a fan, and other elements for refrigerating the two storage compartments, and the control device includes a freezing compartment sensor and a refrigerating compartment sensor (not shown) for detecting storage temperatures of the two storage compartments. The refrigeration system 10 has two refrigeration cycles for independently refrigerating the two storage compartments, each of which is capable of independently controlling temperature. The refrigeration cycle mainly refers to the circulation flow of the refrigerant in each element of the refrigeration system, for example, starting from the compressor 4, the refrigerant which releases the cold energy and absorbs the heat of the storage compartment is sucked by the compressor 4 in the form of gas, and is compressed into the vapor of high temperature and high pressure to enter the condenser 5 through the pipeline, and the refrigerant radiates the heat to the outside air in the condenser 5 and is condensed into the liquid refrigerant of high pressure. A dryer 6 is installed downstream of the condenser 5 to minimize the water content of the refrigerant in the refrigeration cycle. After the moisture in the liquid refrigerant is removed by the dryer 6, the liquid refrigerant can be controlled to flow to the refrigerating chamber evaporator 8 and the freezing chamber evaporator 7 respectively under the diversion of the first valve 11 and the second valve 12, so that the refrigerating chamber 2 and the freezing chamber 1 can be refrigerated independently respectively, and the temperature reduction in the two storage rooms is realized. The liquid refrigerant absorbs the heat of the storage compartment, vaporizes into vapor refrigerant, and is sucked by the compressor 4, and the refrigerant enters the next cycle in this way. In the present embodiment, the normal set temperature of the freezing compartment 1 is 18 degrees below zero, and the normal set temperature of the refrigerating compartment 2 is 2 to 6 degrees. Both the freezing chamber 1 and the refrigerating chamber 2 may be air-cooled or direct-cooled. The air cooling method and the direct cooling method are well known to those skilled in the art as cooling methods, and will not be described herein.

The control device can control the flow direction of the refrigerant by controlling the first valve 11 and the second valve 12, so as to achieve independent temperature control of the refrigerating chamber 2 and the freezing chamber 1. Specifically, the control device can control the first valve 11 and the second valve 12 to be in the following states:

in the first state: the first valve 11 is opened, the second valve 12 is closed, the liquid refrigerant only flows to the refrigerating chamber evaporator 8 through the first valve 11, at the moment, the refrigerating chamber 2 is refrigerated, and the freezing chamber 1 is not refrigerated;

in the second state: the first valve 11 is closed, the second valve 12 is opened, the liquid refrigerant only flows to the freezing chamber evaporator 7 through the second valve 12, at the moment, the freezing chamber 1 is refrigerated, and the refrigerating chamber 2 is not refrigerated;

the third state: the first valve 11 and the second valve 12 are simultaneously opened, and the liquid refrigerant can simultaneously flow to the refrigerating compartment evaporator 8 and the freezing compartment evaporator 7 through the first valve 11 and the second valve 12, and the refrigerating compartment 8 and the freezing compartment 7 can simultaneously perform refrigeration.

Fig. 2 shows an embodiment of the arrangement of the refrigerant inlet and outlet pipes with respect to the dryer 6. The dryer 6 includes a generally vertical cylindrical housing 61 defining a drying chamber 62, with desiccant 66 disposed in the drying chamber 62 to remove water from the liquid refrigerant flowing therethrough. The refrigerant introduction pipe 63 is in fluid communication with the dryer 6 to introduce the refrigerant flowing out of the condenser 5 into the dryer 6. A first outlet pipe 64 is in fluid communication with the dryer 6 to deliver the refrigerant to be delivered to the refrigerating compartment evaporator 8, a first valve 11 being provided downstream of the first outlet pipe 64. Likewise, a second outlet pipe 65 is in fluid communication with the dryer 6 for delivering the refrigerant to be delivered to the freezer evaporator 7, and a second valve 12 is installed downstream of the second outlet pipe 65.

In the case where both the fresh food compartment 2 and the freezer compartment 1 have a demand for cooling while cooling, the first valve 11 and the second valve 12 are simultaneously opened to allow refrigerant to exit the dryer 6 and to flow simultaneously to the fresh food compartment evaporator 8 and the freezer compartment evaporator 7 through the first outlet conduit 64 and the second outlet conduit 65. Due to the different set temperatures of the freezer compartment 1 and the fresh food compartment 2 and the different refrigeration requirements, the fresh food compartment evaporator 8 and the freezer compartment evaporator 7 have different operating temperatures and the resistance encountered by the liquid refrigerant leaving the dryer 6 being delivered to the fresh food compartment evaporator 8 is greater than the resistance encountered by the liquid refrigerant leaving the dryer 6 being delivered to the freezer compartment evaporator 7.

Thus, on the dryer's housing 61 or in the drying chamber 62, when the first inlet 641 for liquid refrigerant to flow into the first outlet 64 is at approximately the same height as the second inlet 651 for liquid refrigerant to flow into the second outlet 65 and all other parameters are the same, the pressure required for the refrigerant from the dryer 6 to be supplied to the freezer evaporator 7 is lower than the pressure required for the refrigerant from the dryer 6 to be supplied to the fresh food evaporator 8, then the liquid refrigerant leaving the dryer 6 will appear to be rather selective to enter the second inlet 651 to flow through the second outlet 65 to the freezer evaporator 7, while the fresh food evaporator 8 will be supplied with relatively little liquid refrigerant. In this way, when refrigerating room 2 and freezing room 1 are cooled simultaneously, refrigerating room evaporator 8 cannot obtain a sufficient amount of refrigerant to cool, and refrigerating efficiency of refrigerating room 2 is extremely low.

In contrast, in the present embodiment, it is sufficient to obtain a preference for substantially balancing the liquid refrigerants discharged from the first inlet 641 and the second inlet 651 by disposing the first inlet 641 and the second inlet 651 at different heights. In one specific embodiment, as shown in fig. 2, the dryer 6 is disposed substantially vertically with reference to the gravity direction, the inlet pipe 63 is connected to the upper portion of the casing 61 of the dryer, the first outlet pipe 64 and the second outlet pipe 65 respectively pass through the lower portion of the casing 61 of the dryer and extend into the drying chamber 62 from bottom to top, the outlet 631 of the inlet pipe 63 is located above the first inlet 641 of the first outlet pipe 64 and the second inlet 651 of the second outlet pipe 65, and the first inlet 641 is located at a lower height than the second inlet 651.

When both the refrigerating chamber 2 and the freezing chamber 1 have a refrigerating demand while refrigerating, the compressor 4 is operated and a refrigerant flows in the refrigerating cycle. The first valve 11 and the second valve 12 are simultaneously opened to allow the refrigerant to exit the dryer 6 and to simultaneously flow to the refrigerating compartment evaporator 8 and the freezing compartment evaporator 7 through the first outlet pipe 64 and the second outlet pipe 65. In the case of the compressor 4 operating at the initial speed, liquid refrigerant accumulates in the drying chamber 62 and preferentially enters the first inlet 641 and is delivered to the refrigerating compartment evaporator 8 through the first outlet duct 64, to first ensure that sufficient refrigerant is obtained when the refrigerating compartment evaporator 8 is operating. At this time, the freezing chamber evaporator 7 does not obtain liquid refrigerant, the storage temperature of the freezing chamber 1 gradually rises, the control device correspondingly increases the speed of the compressor 4 based on the increase of the storage temperature of the freezing chamber 1 to accelerate the circulation of the refrigerant, the liquid refrigerant accumulated in the drying chamber 62 meets the requirement of being supplied to the refrigerating chamber evaporator 8, the liquid level of the liquid refrigerant in the drying chamber 62 can continue to rise and is at least higher than the position of the second inlet 651, and the liquid refrigerant can enter the second inlet 651 and is conveyed to the freezing chamber evaporator 7 through the second outlet pipe 65, so that the refrigerating requirement of the freezing chamber 1 is met. Therefore, the freezing chamber evaporator 7 and the refrigerating chamber evaporator 8 obtain approximate balance of the liquid refrigerant discharged from the dryer 6, so that the two evaporators can simultaneously exert refrigeration effects, the refrigeration requirements of the freezing chamber 1 and the refrigerating chamber 2 are met, and the refrigeration efficiency of the freezing chamber 1 and the refrigerating chamber 2 in simultaneous refrigeration is greatly improved.

Fig. 3 shows another embodiment of the arrangement of the refrigerant inlet and outlet pipes with respect to the dryer 6. As shown in fig. 3, this embodiment is different from the above-described embodiment in that: the dryer 6 is arranged substantially vertically with reference to the gravity direction, the first outlet pipe 64 and the second outlet pipe 65 respectively pass through the upper part of the shell 61 of the dryer and extend into the drying chamber 62 from top to bottom, the inlet pipe 63 is connected to the lower part of the shell 61 of the dryer, the outlet 631 of the inlet pipe 63 is positioned below the first inlet 641 of the first outlet pipe 64 and the second inlet 651 of the second outlet pipe 65, and the first inlet 641 is positioned at a lower height than the second inlet 651. This also enables the freezing compartment evaporator 7 and the refrigerating compartment evaporator 8 to obtain a substantial balance of the liquid refrigerant discharged from the dryer 6, so that both evaporators can exert their refrigeration effects simultaneously while satisfying the refrigeration requirements of the freezing compartment 1 and the refrigerating compartment 2.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A refrigeration appliance comprising:

a first evaporator;

a compressor to raise a pressure of the refrigerant;

the method is characterized in that the height of the position, on or in the dryer, of the second inlet of the second eduction pipe is higher than the height of the position, on or in the dryer, of the first inlet of the first eduction pipe on or in the dryer, based on the gravity direction.

2. The refrigeration appliance according to claim 1 wherein a controllable first valve is connected in the flow path between said first outlet conduit and said first evaporator to control whether refrigerant is delivered to said first evaporator; a controllable second valve is connected in the flow path between the second outlet conduit and the second evaporator to control whether refrigerant is delivered to the second evaporator.

3. The refrigeration appliance according to claim 1 wherein the second inlet of said second outlet and the first inlet of said first outlet are at different heights configured such that liquid refrigerant preferentially enters said first outlet through said first inlet during cumulative rising within said drying chamber.

4. The refrigeration appliance according to claim 1, wherein the speed of said compressor is adjustable and is adjusted in relation to the temperature of said compartment.

5. The refrigeration appliance according to claim 1 or 4 wherein as said compressor speed increases, the level of liquid refrigerant in said drying chamber also increases and is above the location of said second inlet of said second outlet conduit.

6. The refrigeration appliance according to claim 1 wherein said first and second exit ducts each extend into said drying chamber.

7. The refrigeration appliance according to claim 6 wherein said inlet outlet of said inlet duct is located below said first inlet of said first outlet duct and said second inlet of said second outlet duct, based on the direction of gravity; and the first eduction tube and the second eduction tube vertically extend into the drying cavity from top to bottom respectively.

8. The refrigeration appliance according to claim 6 wherein said inlet outlet of said inlet duct is located above said first inlet of said first outlet duct and said second inlet of said second outlet duct, based on the direction of gravity; the first outlet pipe and the second outlet pipe respectively vertically extend into the drying cavity from bottom to top.

9. The refrigeration appliance according to claim 2, wherein said first and second valves are controllable to:

10. The refrigeration appliance according to claim 1 further comprising another compartment for storing items, said first evaporator providing a refrigeration effect to said another compartment; the other compartment is set as a refrigerating compartment; the compartment is set as a freezing compartment; the first evaporator is set as a refrigerating chamber evaporator; the second evaporator is set as a freezing chamber evaporator.