阅读说明：本技术 一种冰箱的制冷系统及控制方法 (refrigerating system of refrigerator and control method ) 是由 陈开松 刘全义 尚殿波 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种冰箱的制冷系统及控制方法,涉及冰箱领域。本发明包括压缩机、储液器、冷凝器、过滤器、一进三出电动切换阀A、一进三出电动切换阀B、第一蒸发器、第二蒸发器、第三蒸发器和第四蒸发器；压缩机的入口端通过一回气管与储液器的出口端相连接；压缩机的出口端与冷凝器的入口端通过管道相连接；冷凝器的出口端与过滤器的入口端通过管道相连接；过滤器的出口端与一进三出电动切换阀A的入口端通过管道相连接；一进三出电动切换阀A的一出口端与一进三出电动切换阀B的入口端通过管道相连接。本发明的制冷系统可以解决当前制冷系统的制冷剂迁移等问题,确保制冷系统循环效率更高,且满足全变温设计要求。(The invention discloses a refrigeration system of a refrigerator and a control method, and relates to the field of refrigerators. The invention comprises a compressor, a liquid storage device, a condenser, a filter, a one-in three-out electric switching valve A, a one-in three-out electric switching valve B, a first evaporator, a second evaporator, a third evaporator and a fourth evaporator; the inlet end of the compressor is connected with the outlet end of the liquid storage device through an air return pipe; the outlet end of the compressor is connected with the inlet end of the condenser through a pipeline; the outlet end of the condenser is connected with the inlet end of the filter through a pipeline; the outlet end of the filter is connected with the inlet end of the one-in three-out electric switching valve A through a pipeline; an outlet end of the one-in three-out electric switching valve A is connected with an inlet end of the one-in three-out electric switching valve B through a pipeline. The refrigerating system can solve the problems of refrigerant migration and the like of the conventional refrigerating system, ensures higher circulating efficiency of the refrigerating system and meets the requirement of full-variable-temperature design.)

1. A refrigerating system of a refrigerator comprises a compressor (1), an accumulator (2), a condenser (3) and a filter (4); the system is characterized by further comprising a one-in three-out electric switching valve A (5), a one-in three-out electric switching valve B (6), a first evaporator (7), a second evaporator (8), a third evaporator (9) and a fourth evaporator (10);

the inlet end of the compressor (1) is connected with the outlet end of the liquid storage device (2) through an air return pipe (11); the outlet end of the compressor (1) is connected with the inlet end of the condenser (3) through a pipeline; the outlet end of the condenser (3) is connected with the inlet end of the filter (4) through a pipeline; the outlet end of the filter (4) is connected with the inlet end of a one-in three-out electric switching valve A (5) through a pipeline;

an outlet end of the one-in three-out electric switching valve A (5) is connected with an inlet end of the one-in three-out electric switching valve B (6) through a pipeline; the other two outlet ends of the one-inlet three-outlet electric switching valve A (5) are respectively connected with a first capillary tube (12) and a second capillary tube (13) through pipelines; the outlet end of the first capillary tube (12) is connected with one end of the first evaporator (7) through a pipeline; one end of the first evaporator (7) is connected with the inlet end of the liquid storage device (2) through a pipeline, and a first low-temperature stop valve (14) is arranged on the pipeline;

The outlet end of the second capillary tube (13) is connected with one end of a second evaporator (8) through a pipeline; one end of the second evaporator (8) is connected with the inlet end of the liquid storage device (2) through a pipeline, and a second low-temperature stop valve (15) is arranged on the pipeline; the other end of the second evaporator (8) is connected with the other end of the first evaporator (7) through a pipeline, and a three-way pipe (Y) is arranged on the pipeline;

Three outlet ends of the one-inlet three-outlet electric switching valve B (6) are respectively connected with a third capillary tube (16), a fourth capillary tube (17) and a fifth capillary tube (18) through pipelines; the outlet end of the third capillary tube (16) is connected with one end of a third evaporator (9) through a pipeline; one end of the third evaporator (9) is connected with the inlet end of the liquid storage device (2) through a pipeline, and a third low-temperature stop valve (19) is arranged on the pipeline;

the outlet end of the fourth capillary tube (17) is connected with one end of a fourth evaporator (10) through a pipeline; one end of the fourth evaporator (10) is connected with the inlet end of the liquid storage device (2) through a pipeline, and a fourth low-temperature stop valve (20) is arranged on the pipeline; the other end of the fourth evaporator (10) is connected with the other end of the third evaporator (9) through a pipeline, and a four-way pipe (X) is arranged on the pipeline; the other two ports of the four-way pipe (X) are respectively connected with one port of the three-way pipe (Y) and the outlet end of the fifth capillary (18) through pipelines.

2. a refrigeration control method of a refrigerator, the refrigerator is provided with four refrigeration compartments; the four refrigerating compartments are respectively arranged corresponding to the first evaporator (7), the second evaporator (8), the third evaporator (9) and the fourth evaporator (10); the refrigeration control method is characterized by comprising the following steps of:

step one, judging whether temperature set values of all refrigerating compartments of the refrigerator are the same or not;

1) If the temperature set values of all the refrigerating chambers of the refrigerator are the same, refrigerating is carried out according to the A-type refrigerating priority of the refrigerating chambers and at most two refrigerating chambers are combined;

2) if the temperature set values of all the refrigerating compartments of the refrigerator are different or partially the same, the following two refrigerating modes are adopted:

(A) when only one refrigerating chamber requests refrigeration, the refrigerating chamber performs refrigeration independently;

(B) when a plurality of refrigerating compartments request refrigeration at the same time, refrigerating in a combined mode that the refrigerating compartment with the lowest temperature is at the front and the refrigerating compartment with the secondary temperature is at the back, and for the refrigeration of the refrigerating compartments with the same temperature set value, refrigerating by adopting the B-type refrigeration priority and combining at most two refrigerating compartments;

and step two, stopping refrigeration after all the refrigeration compartments reach the shutdown temperature point.

Technical Field

the invention belongs to the field of refrigerators, and particularly relates to a refrigeration system of a refrigerator and a control method.

Background

At present, the types of the refrigeration systems of the refrigerator are more, and the refrigeration systems of the refrigerator are mainly divided into three types, namely a single-cycle refrigeration system, a double-cycle refrigeration system and a three-cycle refrigeration system according to the requirements of the capacity of the refrigerator, the number of compartments, whether air cooling is needed and the like, wherein the double-cycle refrigeration system and the three-cycle refrigeration system can also be divided into a series-parallel connection mode and a pure-parallel connection mode. The series-parallel connection mode is the most widely applied refrigeration system mode in the air-cooled refrigerator in the refrigerator industry at present, in the actual operation process of the refrigeration system, the actual operation temperature of the front-end evaporator is generally below-16 ℃, and from the view of the operation cycle efficiency of the refrigeration system, the evaporator for refrigerating the refrigerating chamber cannot fully exert the operation efficiency of the system, and the efficiency is lower; although the temperature of the evaporator in the refrigerating chamber can reach more than-16 ℃, the theoretical analysis has strong performance on the refrigerating system, but from the practical design and operation results, the volume of the evaporator is generally small because the set temperature of the refrigerating chamber is higher, and when the evaporator is combined with the evaporator in the freezing chamber, the following problems generally occur:

1) when two low-temperature evaporators in a pure parallel refrigeration system perform refrigeration switching, the problem of refrigerant migration can occur, so that one evaporator can experience long overheating at the initial stage of refrigeration, and the performance of the refrigeration system is poor;

2) The evaporator for refrigerating and refrigerating in the pure parallel refrigerating system is small in volume, the evaporator for freezing and refrigerating is large in volume, and the problem of serious condensation of the air return pipe caused by over-low temperature of the air return pipe occasionally occurs in the refrigerating and switching process when the small-volume evaporator is used for refrigerating;

3) the conventional pure parallel refrigerating system can only meet the design requirements of the functions of a refrigerating temperature zone and a freezing temperature zone, and cannot meet the design function requirements of a full-variable temperature (the temperature zone of each chamber can be freely switched between-18 ℃ to 8 ℃) temperature zone.

The above problems also occur in a purely parallel manner in a three-cycle refrigeration system, which is not described in detail here.

the refrigeration system migration, the air return pipe condensation and the incapability of realizing that all the refrigeration compartments can meet the design requirement of full temperature change exist in the refrigeration system, and a refrigeration system and a control method of a refrigerator need to be designed to solve the technical problems.

disclosure of Invention

the invention provides a refrigeration system of a refrigerator and a control method thereof, and aims to solve the problems in the background technology.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a refrigerating system of a refrigerator, which comprises a compressor, a liquid storage device, a condenser and a filter; the system is characterized by further comprising a one-in three-out electric switching valve A, a one-in three-out electric switching valve B, a first evaporator, a second evaporator, a third evaporator and a fourth evaporator;

the inlet end of the compressor is connected with the outlet end of the liquid storage device through an air return pipe; the outlet end of the compressor is connected with the inlet end of the condenser through a pipeline; the outlet end of the condenser is connected with the inlet end of the filter through a pipeline; the outlet end of the filter is connected with the inlet end of the one-in three-out electric switching valve A through a pipeline;

One outlet end of the one-in three-out electric switching valve A is connected with the inlet end of the one-in three-out electric switching valve B through a pipeline; the other two outlet ends of the one-in three-out electric switching valve A are respectively connected with a first capillary tube and a second capillary tube through pipelines; the outlet end of the first capillary tube is connected with one end of the first evaporator through a pipeline; one end of the first evaporator is connected with the inlet end of the liquid storage device through a pipeline, and a first low-temperature stop valve is arranged on the pipeline;

the outlet end of the second capillary tube is connected with one end of a second evaporator through a pipeline; one end of the second evaporator is connected with the inlet end of the liquid storage device through a pipeline, and a second low-temperature stop valve is arranged on the pipeline; the other end of the second evaporator is connected with the other end of the first evaporator through a pipeline, and a three-way pipe Y is arranged on the pipeline;

three outlet ends of the one-in three-out electric switching valve B are respectively connected with a third capillary tube, a fourth capillary tube and a fifth capillary tube through pipelines; the outlet end of the third capillary tube is connected with one end of a third evaporator through a pipeline; one end of the third evaporator is connected with the inlet end of the liquid storage device through a pipeline, and a third low-temperature stop valve is arranged on the pipeline;

the outlet end of the fourth capillary tube is connected with one end of a fourth evaporator through a pipeline; one end of the fourth evaporator is connected with the inlet end of the liquid storage device through a pipeline, and a fourth low-temperature stop valve is arranged on the pipeline; the other end of the fourth evaporator is connected with the other end of the third evaporator through a pipeline, and a four-way pipe X is arranged on the pipeline; and the other two ports of the four-way pipe X are respectively connected with one port of the three-way pipe Y and the outlet end of the fifth capillary tube through pipelines.

A refrigeration control method of a refrigerator, the refrigerator is provided with four refrigeration compartments; the four refrigerating compartments are respectively arranged corresponding to the first evaporator, the second evaporator, the third evaporator and the fourth evaporator; the refrigeration control method comprises the following steps:

step one, judging whether temperature set values of all refrigerating compartments of the refrigerator are the same or not;

1) If the temperature set values of all the refrigerating chambers of the refrigerator are the same, refrigerating is carried out according to the A-type refrigerating priority of the refrigerating chambers and at most two refrigerating chambers are combined;

2) if the temperature set values of all the refrigerating compartments of the refrigerator are different or partially the same, the following two refrigerating modes are adopted:

(A) When only one refrigerating chamber requests refrigeration, the refrigerating chamber performs refrigeration independently;

(B) when a plurality of refrigerating compartments request refrigeration at the same time, refrigerating in a combined mode that the refrigerating compartment with the lowest temperature is at the front and the refrigerating compartment with the secondary temperature is at the back, and for the refrigeration of the refrigerating compartments with the same temperature set value, refrigerating by adopting the B-type refrigeration priority and combining at most two refrigerating compartments;

and step two, stopping refrigeration after all the refrigeration compartments reach the shutdown temperature point.

the invention has the following beneficial effects:

(1) the refrigeration system can solve the problem of refrigerant migration of the existing refrigeration system and ensure higher cycle efficiency of the refrigeration system;

(2) the low-temperature stop valve is applied to the refrigerating system, so that the independent refrigerating function of the multi-chamber refrigerator can be realized, and the design requirement of full temperature change is met;

(3) The invention can ensure that the condensation problem of the air return pipe cannot occur in any refrigeration mode by innovatively designing a control logic.

(4) the refrigerating system can realize the combined function of pure parallel and series-parallel refrigerating systems, the temperature of the evaporator of the refrigerating chamber can reach-10 ℃, and the better circulation performance of the system can be ensured.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

drawings

in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

fig. 1 is a schematic block diagram of a refrigeration system of a refrigerator according to the present invention.

in the drawings, the components represented by the respective reference numerals are listed below:

1-compressor, 2-liquid storage device, 3-condenser, 4-filter, 5-one-inlet three-outlet electric switching valve A, 6-one-inlet three-outlet electric switching valve B, 7-first evaporator, 8-second evaporator, 9-third evaporator, 10-fourth evaporator, 11-air return pipe, 12-first capillary, 13-second capillary, 14-first low-temperature stop valve, 15-second low-temperature stop valve, 16-third capillary, 17-fourth capillary, 18-fifth capillary, 19-third low-temperature stop valve and 20-fourth low-temperature stop valve.

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, the present invention is a refrigeration system of a refrigerator, including a compressor 1, a liquid reservoir 2, a condenser 3, a filter 4, a one-in three-out electric switching valve a5, a one-in three-out electric switching valve B6, a first evaporator 7, a second evaporator 8, a third evaporator 9, and a fourth evaporator 10; the inlet end of the compressor 1 is connected with the outlet end of the liquid storage device 2 through an air return pipe 11; the outlet end of the compressor 1 is connected with the inlet end of the condenser 3 through a pipeline; the outlet end of the condenser 3 is connected with the inlet end of the filter 4 through a pipeline; the outlet end of the filter 4 is connected with the inlet end of an one-in three-out electric switching valve A5 through a pipeline;

the one-in three-out electric switching valve A5 has three outlet ends of a1, a2 and a 3; the outlet end a1 of the one-in three-out electric switching valve A5 is connected with the inlet end of the one-in three-out electric switching valve B6 through a pipeline; the outlet end a2 of the one-in three-out electric switching valve A5 is connected with the inlet end of a first capillary tube 12 through a pipeline; the outlet end a3 of the one-in three-out electric switching valve A5 is connected with the inlet end of a second capillary tube 13 through a pipeline; the outlet end of the first capillary tube 12 is connected with one end of the first evaporator 7 through a pipeline; one end of the first evaporator 7 is connected with the inlet end of the liquid storage device 2 through a pipeline, and a first low-temperature stop valve 14 is arranged on the pipeline;

The outlet end of the second capillary tube 13 is connected with one end of the second evaporator 8 through a pipeline; one end of the second evaporator 8 is connected with the inlet end of the liquid storage device 2 through a pipeline, and a second low-temperature stop valve 15 is arranged on the pipeline; the other end of the second evaporator 8 is connected with the other end of the first evaporator 7 through a pipeline, and a three-way pipe Y is arranged on the pipeline; tee Y has three ports, Y1, Y2 and Y3; a port Y1 and a port Y2 of the tee pipe Y are respectively connected with a pipeline between the second evaporator 8 and the first evaporator 7;

the one-in three-out electric switching valve B6 has three outlet ends B1, B2 and B3; three outlet ends of the one-in three-out electric switching valve B6 are respectively connected with a third capillary tube 16, a fourth capillary tube 17 and a fifth capillary tube 18 through pipelines, namely, the outlet end of B1 of the one-in three-out electric switching valve B6 is connected with the inlet end of the third capillary tube 16 through a pipeline, the outlet end of B3 of the one-in three-out electric switching valve B6 is connected with the inlet end of the fourth capillary tube 17 through a pipeline, and the outlet end of B3 of the one-in three-out electric switching valve B6 is connected with the inlet end of the fifth capillary tube 18 through a pipeline; the outlet end of the third capillary tube 16 is connected with one end of the third evaporator 9 through a pipeline; one end of the third evaporator 9 is connected with the inlet end of the liquid storage device 2 through a pipeline, and a third low-temperature stop valve 19 is arranged on the pipeline;

The outlet end of the fourth capillary tube 17 is connected with one end of the fourth evaporator 10 through a pipeline; one end of the fourth evaporator 10 is connected with the inlet end of the liquid reservoir 2 through a pipeline, and a fourth low-temperature stop valve 20 is arranged on the pipeline; the other end of the fourth evaporator 10 is connected with the other end of the third evaporator 9 through a pipeline, and a four-way pipe X is arranged on the pipeline; four-way tube X has four ports X1, X2, X3 and X4; the four-way pipe X is provided with an X1 port and an X2 port which are respectively connected with the pipeline between the fourth evaporator 10 and the third evaporator 9; the X3 port of the four-way pipe X is connected with the Y3 port of the three-way pipe Y through a pipeline; the X4 port of the four-way tube X is connected with the outlet end of the fifth capillary tube 18 through a pipeline.

Specifically, when the outlet end a1 and the outlet end A3 of the one-in-three-out electric changeover valve a5 are closed, the first low-temperature stop valve 14 is closed, the third low-temperature stop valve 19 is closed, and the fourth low-temperature stop valve 20 is closed, the compressor 1, the condenser 3, the filter 4, the one-in-three-out electric changeover valve a5, the first capillary tube 12, the first evaporator 7, the second evaporator 8, the second low-temperature stop valve 15, the accumulator 2, the return air pipe 11, and the compressor 1 form a refrigeration circuit. The refrigerant flows to the first evaporator 7, the second evaporator 8, the third evaporator 9 and the fourth evaporator 10 by adjusting the opening and closing state of each outlet end of the one-in three-out electric switching valve A5, the opening and closing state of each outlet end of the one-in three-out electric switching valve B6, the opening and closing state of the first low-temperature stop valve 14, the opening and closing state of the second low-temperature stop valve 15, the opening and closing state of the third low-temperature stop valve 19 and the opening and closing state of the fourth low-temperature stop valve 20, so that the full temperature-changing refrigeration design of the refrigerator is realized.

a refrigeration control method of a refrigerator is provided, the refrigerator is provided with four refrigeration compartments; the four refrigerating chambers are respectively a first refrigerating chamber, a second refrigerating chamber, a third refrigerating chamber and a fourth refrigerating chamber; the first refrigeration chamber, the second refrigeration chamber, the third refrigeration chamber and the fourth refrigeration chamber are respectively arranged corresponding to the first evaporator 7, the second evaporator 8, the third evaporator 9 and the fourth evaporator 10, namely the first evaporator 7 is used for providing cold energy for the first refrigeration chamber, the second evaporator 8 is used for providing cold energy for the second refrigeration chamber, the third evaporator 9 is used for providing cold energy for the third refrigeration chamber and the fourth evaporator 10 is used for providing cold energy for the fourth refrigeration chamber; the refrigeration control method comprises the following steps:

Step one, judging whether temperature set values of all refrigerating compartments of the refrigerator are the same or not;

1) if the temperature set values of all the refrigerating chambers of the refrigerator are the same, refrigerating is carried out according to the A-type refrigerating priority of the refrigerating chambers and at most two refrigerating chambers are combined; the priority of the type A refrigeration is first refrigeration chamber → second refrigeration chamber → third refrigeration chamber → fourth refrigeration chamber → first refrigeration chamber, namely, the first refrigeration chamber and the second refrigeration chamber refrigerate firstly, if the first refrigeration chamber reaches a stop point firstly and the second refrigeration chamber does not reach the stop point, the second refrigeration chamber and the third refrigeration chamber run for refrigeration, and so on; meanwhile, when the refrigerated refrigerating chamber requests refrigeration again, the refrigerating chambers need to be sequentially queued at the tail end for refrigeration;

2) If the temperature set values of all the refrigerating compartments of the refrigerator are different or partially the same, the following two refrigerating modes are adopted:

(A) When only one refrigerating chamber requests refrigeration, the refrigerating chamber performs refrigeration independently;

(B) when a plurality of refrigerating compartments request refrigeration at the same time, refrigerating in a combined mode that the refrigerating compartment with the lowest temperature is at the front and the refrigerating compartment with the secondary temperature is at the back, and for the refrigeration of the refrigerating compartments with the same temperature set value, refrigerating by adopting the B-type refrigeration priority and combining at most two refrigerating compartments;

And step two, stopping refrigeration after all the refrigeration compartments reach the shutdown temperature point.

when a plurality of refrigerating compartments simultaneously request refrigeration under the premise that the temperature set values of all the refrigerating compartments of the refrigerator are different or partially identical in the first step, if:

(a) One of the refrigerating chambers is a freezing chamber, and the other three refrigerating chambers are refrigerating chambers, and the refrigerating chambers and the refrigerating chamber with the lowest temperature set value are jointly operated; when the freezing chamber reaches the shutdown temperature point, the rest three refrigerating chambers operate and refrigerate according to the B-type refrigeration priority; the B-type refrigeration priority is the refrigeration chamber with the lowest temperature set value → the refrigeration chamber with the second temperature set value → the refrigeration chamber with the highest temperature set value → the refrigeration chamber with the lowest temperature set value, namely the refrigeration chamber with the lowest temperature set value + the refrigeration chamber with the second temperature set value refrigerates firstly, if the refrigeration chamber with the lowest temperature set value reaches the stop point firstly and the refrigeration chamber with the second temperature set value does not reach the stop point, the refrigeration chamber with the second temperature set value + the refrigeration chamber with the highest temperature set value operates for refrigeration, and the like; meanwhile, when the refrigerated refrigerating chamber requests refrigeration again, the refrigerating chambers need to be sequentially queued at the tail end for refrigeration; if the freezing chamber does not reach the stop point and the longest operation time T is reached, the freezing chamber and other cold storage chambers requiring refrigeration are continuously operated, and the like to operate the circulating refrigeration; other refrigerating compartments requiring refrigeration need to be sequentially queued at the tail end for refrigeration;

(b) Two of the refrigerating chambers are freezing chambers, and the other two refrigerating chambers are refrigerating chambers, the freezing chamber with the lowest set temperature value and the refrigerating chamber with the lowest set temperature value are jointly operated firstly, if the freezing chamber with the lowest set temperature value reaches a shutdown temperature point, the freezing chamber with the highest set temperature value and other refrigerating chambers requiring refrigeration are jointly operated for refrigeration, and the other refrigerating chambers requiring refrigeration need to be sequentially queued at the tail end for refrigeration; if the two freezing compartments reach the shutdown temperature point, the two refrigerating compartments perform refrigeration jointly; if the two freezing compartments both request refrigeration and the two refrigerating compartments both reach the shutdown temperature point, the freezing compartment with the lowest set temperature value and the freezing compartment with the highest set temperature value are jointly refrigerated and operated;

(c) If the three refrigerating chambers are freezing chambers and the other refrigerating chamber is a refrigerating chamber, the freezing chamber and the refrigerating chamber with the lowest temperature value are set to jointly operate, if the freezing chamber with the lowest temperature value reaches the shutdown temperature point, the freezing chamber and the refrigerating chamber with the next set temperature value jointly operate, and the like. If the refrigerating compartments reach the shutdown temperature point, the three refrigerating compartments operate and refrigerate according to the refrigeration request state and the class B refrigeration priority; the type B refrigeration priority is the freezing chamber with the lowest temperature set value → the freezing chamber with the second temperature set value → the freezing chamber with the highest temperature set value → the freezing chamber with the lowest temperature set value, namely the freezing chamber with the lowest temperature set value + the freezing chamber with the second temperature set value refrigerates firstly, if the freezing chamber with the lowest temperature set value reaches the stop point firstly and the freezing chamber with the second temperature set value does not reach the stop point, the freezing chamber with the second temperature set value + the freezing chamber with the highest temperature set value operate for refrigeration, and the like; meanwhile, when the refrigerated refrigerating chamber requests refrigeration again, the refrigerating chambers need to be sequentially queued at the tail end for refrigeration;

wherein the longest operation time T is within the range of 30-60 min.

Of course, the refrigerator carrier applied to the refrigeration system of the refrigerator is generally four independent refrigeration chambers, and can also be used together with a refrigeration fan to form a redundant four-chamber combined refrigerator.

the preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.