CN112484369A

CN112484369A - Refrigerator and method for refrigerator

Info

Publication number: CN112484369A
Application number: CN201910863443.6A
Authority: CN
Inventors: 刘翔宇; 朱啟武; 朱卫忠; 沈贵可; 沈凌峰
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd; Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2021-03-12

Abstract

The embodiment of the invention relates to a refrigerator and a method for the same. The method for the refrigerator comprises the following steps: determining a stop temperature of the first storage chamber according to a set temperature of the first storage chamber, wherein the stop temperature of the first storage chamber is lower than the set temperature of the first storage chamber; determining a stop temperature of the second storage chamber according to the set temperature of the second storage chamber, the stop temperature of the second storage chamber being lower than the set temperature of the second storage chamber; adjusting a speed of the compressor to bring a temperature of the first storage chamber toward a target temperature higher than a stop temperature of the first storage chamber while the first storage chamber is cooled; and cooling the second storage chamber with the stop temperature of the second storage chamber as a target temperature of the second storage chamber to stop cooling the second storage chamber when the temperature of the second storage chamber drops to the stop temperature of the second storage chamber, when the second storage chamber is cooled.

Description

Refrigerator and method for refrigerator

[ technical field ]

The embodiment of the invention relates to a refrigerator and a method for the same.

[ background art ]

In the current refrigerator, the starting temperature and the stopping temperature of a storage chamber are generally determined according to the set temperature of the storage chamber, and a compressor is started when the starting condition is reached and stops working when the stopping condition is reached. For example, when the temperature of the storage chamber reaches the startup temperature, the compressor starts to refrigerate the storage chamber, and when the temperature of the storage chamber is cooled to the shutdown temperature, the refrigeration of the storage chamber is stopped. Thus, the temperature of the storage compartment fluctuates widely between the start-up temperature and the shut-down temperature.

[ summary of the invention ]

An object of an embodiment of the present invention is to provide a method for a refrigerator and a refrigerator.

Another object of an embodiment of the present invention is to provide a method for a refrigerator and a refrigerator which are advantageous to improve temperature management accuracy.

Accordingly, an aspect of an embodiment of the present invention is directed to a method of a refrigerator including a first storage chamber and a second storage chamber, the method including: determining a stop temperature of the first storage chamber according to a set temperature of the first storage chamber, wherein the stop temperature of the first storage chamber is lower than the set temperature of the first storage chamber; determining a stop temperature of the second storage chamber according to a set temperature of the second storage chamber, the stop temperature of the second storage chamber being lower than the set temperature of the second storage chamber; adjusting a speed of the compressor to bring a temperature of the first storage chamber toward a target temperature of the first storage chamber while the first storage chamber is cooled, the target temperature being higher than a stop temperature of the first storage chamber; and cooling the second storage chamber with the stop temperature of the second storage chamber as a target temperature of the second storage chamber to stop cooling the second storage chamber when the temperature of the second storage chamber drops to the stop temperature of the second storage chamber, when the second storage chamber is cooled.

The speed of the compressor is adjusted to enable the temperature of the first storage chamber to approach the target temperature of the first storage chamber, and the target temperature of the first storage chamber is higher than the stop temperature of the first storage chamber, so that the temperature of the first storage chamber cannot easily reach the stop temperature of the first storage chamber, and the compressor can keep running, and therefore the starting frequency and the stopping frequency of the compressor can be reduced, the noise can be reduced, and the energy consumption can be reduced remarkably. Meanwhile, the temperatures of the first storage chamber and the second storage chamber are controlled by different temperature control logics, so that the temperature of the first storage chamber is slightly fluctuated within a temperature range smaller than the starting temperature and the stopping temperature of the first storage chamber for a long time, and even is maintained at the target temperature of the first storage chamber for a long time, and the realization is easier. In addition, since the cooling second storage chamber has the stop temperature of the second storage chamber as the target temperature of the second storage chamber, even when both the first storage chamber and the second storage chamber have a cooling demand, it is still possible to allow the second storage chamber to finish cooling relatively quickly while the first storage chamber can still substantially maintain or approach the trend of the target temperature of the first storage chamber, and therefore it is possible for the first storage chamber and the second storage chamber to be simultaneously cooled and substantially retain the respective temperature control logics, that is, it is possible to make the first storage chamber have a cooling demand for a long time and make the compressor continuously operate in the case of a refrigerator having at least two storage chambers.

The set temperature of the first storage chamber and the set temperature of the second storage chamber may be input by a user through the input unit. It may be possible that the set temperature of the first storage chamber or the set temperature of the second storage chamber is set by the refrigerator by default if the set temperature of the first storage chamber or the set temperature of the second storage chamber is not changeable.

The trend of the temperature of the first storage chamber toward the target temperature of the first storage chamber may include the temperature of the first storage chamber being substantially maintained at the target temperature and/or fluctuating slightly about the target temperature.

For example, the temperature of the first storage chamber may range from a target temperature far from the first storage chamber to a target temperature gradually close to the first storage chamber. For another example, when the temperature of the first storage chamber has been substantially stabilized, the temperature of the first storage chamber may be substantially maintained at or fluctuate slightly around the target temperature of the first storage chamber.

According to the embodiment of the present invention, the compressor can be operated for a long time by adjusting the speed of the compressor such that the temperature of the first storage chamber may be higher than the stop temperature of the first storage chamber for a long time and approach the target temperature of the first storage chamber. Theoretically, if the speed and power adjustment range of the compressor is large enough, it is possible for the compressor to maintain operation for a long period of time without external demands (e.g., defrosting, blackout, etc.). This does not exclude the case where the compressor stops operating for the first storage chamber when the ambient temperature is so low that the compressor cannot avoid the temperature of the first storage chamber from dropping to the stop temperature of the first storage chamber at the minimum operating speed/power.

In one or some embodiments, the target temperature of the first storage chamber is determined according to a set temperature of the first storage chamber. For example, the target temperature of the first storage chamber is a set temperature of the first storage chamber.

In one or some embodiments, adjusting the speed of the compressor comprises: the speed of the compressor is reduced to raise the temperature of the first storage chamber from between the target temperature of the first storage chamber and the first storage chamber stop temperature toward the target temperature of the first storage chamber.

In one or some embodiments, adjusting the speed of the compressor comprises: the speed of the compressor is increased to decrease the temperature of the first storage chamber from between the target temperature of the first storage chamber and the first storage chamber startup temperature toward the target temperature of the first storage chamber.

In one or some embodiments, the temperature of the first storage chamber is detected and the speed of the compressor is adjusted according to the temperature of the first storage chamber so that the temperature of the first storage chamber approaches the target temperature of the first storage chamber.

In one or some embodiments, adjusting the speed of the compressor based on the temperature of the first storage chamber includes adjusting the speed of the compressor by a difference between the temperature of the first storage chamber and a target temperature of the first storage chamber. This facilitates quickly and accurately achieving that the first storage chamber tends to the target temperature of the first storage chamber or is maintained at the target temperature of the first storage chamber for a longer time.

In one or some embodiments, adjusting the compressor speed according to the temperature of the first storage chamber includes adjusting the compressor speed according to a rate of change of the temperature of the first storage chamber.

In one or some embodiments, when the compressor is operated to cool the first storage chamber and the second storage chamber at the same time, the speed of the compressor is adjusted to make the temperature of the first storage chamber approach the target temperature of the first storage chamber, and the second storage chamber is cooled with the stop temperature of the second storage chamber as the target temperature of the second storage chamber to stop cooling the second storage chamber when the temperature of the second storage chamber drops to the stop temperature of the second storage chamber. The first storeroom and the second storeroom are cooled by adopting different logics under the temperature control of the first storeroom and the second storeroom, so that the temperature of the first storeroom can be accurately controlled and the startup and shutdown frequency of the compressor can be reduced under the condition that the second storeroom can be guaranteed to be cooled in time, and the noise and the energy consumption are reduced.

In one or some embodiments, when the compressor operates to simultaneously cool the first storage chamber and the second storage chamber, the compressor operates in a first speed mode, wherein the first speed mode adjusts an operation speed of the compressor based on a temperature of the first storage chamber among temperatures of the first storage chamber and the second storage chamber. Therefore, the temperature of the first storage chamber can be controlled more accurately.

In one or some embodiments, when the compressor operates to simultaneously cool the first storage chamber and the second storage chamber, the compressor operates in a third speed mode, wherein the third speed mode is increased by an additional speed value based on the first speed mode, wherein the first speed mode is a speed of the compressor adjusted by the first storage chamber temperature of the first storage chamber temperature and the second storage chamber temperature. This is advantageous in that the cooling demand of the second storage compartment can be satisfied as soon as possible.

In one or some embodiments, the speed of the compressor is operated in a fixed mode or a fixed speed when the compressor is operated to cool only the second storage chamber.

Although it is also possible that the first storage compartment and the second storage compartment are supplied with cooling energy through ducts that control whether the first storage compartment and the second storage compartment are cooled by the same evaporator through different dampers, in one or some embodiments, when the compressor is operated to cool the first storage compartment and the second storage compartment simultaneously, a refrigerant is supplied to a first refrigeration line and a second refrigeration line connected in parallel, wherein the first refrigeration line is connected to an inlet of a first evaporator for cooling the first storage compartment, and the second refrigeration line is connected to an inlet of a second evaporator for cooling the second storage compartment. Thereby more facilitating temperature control of the first storage chamber and the second storage chamber.

In one or some embodiments, supplying refrigerant to the first refrigeration line and the second refrigeration line in parallel includes preferentially supplying refrigerant to the second refrigeration line of the first refrigeration line and the second refrigeration line. Thereby ensuring that the second storage chamber can be cooled in time.

In one or some embodiments, a dryer is included downstream of the condenser, the dryer including a drying chamber; the refrigerant in the drying cavity preferentially supplies the refrigerant to the second refrigeration pipeline of the first refrigeration pipeline and the second refrigeration pipeline, or the refrigerant discharged from the drying cavity preferentially supplies the refrigerant to the second refrigeration pipeline of the first refrigeration pipeline and the second refrigeration pipeline.

In one or some embodiments, the inlet of the first refrigeration line and the inlet of the second refrigeration line are located in the drying cavity, and the lowest accumulation height of the refrigerant in the drying cavity required by the inlet of the second refrigeration line for obtaining the refrigerant is lower than that required by the inlet of the first refrigeration line for obtaining the refrigerant.

In one or some embodiments, the first storage chamber is a freezer chamber and the second storage chamber includes a non-freezing temperature range. The second storage room may be, for example, a refrigerating room, a temperature-changing room, or an ice-temperature room.

In one or some embodiments, in a simultaneous cooling mode in which the compressor is operated to simultaneously cool the first storage chamber and the second storage chamber, the first refrigeration line and the second refrigeration line connected in parallel are alternately supplied with a supply refrigerant for use in a first evaporator for cooling the first storage chamber and a second evaporator for cooling the second storage chamber, with the first refrigeration line being connected to an inlet of the first evaporator, while continuing to evaporate refrigerant. The rapid cooling of the second storage chamber can be ensured by rapidly switching and opening the first refrigeration pipeline and the second refrigeration pipeline so that the refrigerant in the first evaporator and the second evaporator is simultaneously and continuously evaporated, and the temperature relative temperature of the first storage chamber can be ensured.

In one or some embodiments, the second fan for the second storage chamber is operated while the compressor is operated to simultaneously cool the first storage chamber and the second storage chamber, a speed of the second fan being associated with a temperature of the first storage chamber. By correlating the speed of the second fan with the temperature of the first storage chamber, the speed of the second fan and the cooling rate of the refrigeration system to the second storage chamber are more matched where the speed of the compressor is adjusted based on the temperature of the first storage chamber.

Another aspect of an embodiment of the present invention relates to a refrigerator, including: a first storage chamber; a second storage chamber; the input unit is suitable for receiving the set temperature of the first storage chamber and the set temperature of the second storage chamber input by a user; a compressor; a condenser; a first evaporator to cool the first storage chamber; a second evaporator to cool the second storage chamber; the refrigerant output by the condenser is supplied to the first evaporator through the first refrigeration pipeline; the refrigerant output by the condenser is supplied to the second evaporator through the second refrigeration pipeline, and the inlet ends of the first refrigeration pipeline and the second refrigeration pipeline are connected in parallel; a fluid control unit for selectively delivering the refrigerant outputted from the condenser to the first refrigeration circuit and/or the second refrigeration circuit; and a control unit coupled with the compressor, the input unit and the fluid control unit to cause the refrigerator to perform the method of any one of the preceding claims.

[ description of the drawings ]

Fig. 1 is a schematic view of a refrigerator according to one embodiment of the present invention.

Fig. 2 is a schematic view of a refrigeration system of a refrigerator according to another embodiment of the present invention.

Fig. 3 is a schematic view of a refrigeration system of a refrigerator according to still another embodiment of the present invention.

Fig. 4 is a schematic system diagram of a refrigerator according to one embodiment of the present invention.

Fig. 5 is a flowchart of a method for a refrigerator according to an embodiment of the present invention.

FIG. 6 is a schematic view of a dryer according to one embodiment of the present invention.

Fig. 7 is a schematic view of a dryer according to another embodiment of the present invention.

Fig. 8 is a flowchart of a method for a refrigerator according to an embodiment of the present invention.

Fig. 9 is a schematic variation diagram regarding a compressor speed, a first storage compartment temperature, and a second storage compartment temperature obtained according to a method for a refrigerator performing one embodiment of the present invention.

Fig. 10 is a flowchart of a method for a refrigerator according to still another embodiment of the present invention.

Fig. 11 is a schematic variation diagram regarding a compressor speed, a first storage compartment temperature, and a second storage compartment temperature, which is obtained by performing a method for a refrigerator according to still another embodiment of the present invention.

[ detailed description of the invention ]

Fig. 1 is a schematic view of a refrigerator 100 according to one embodiment of the present invention. As shown in fig. 1, the refrigerator 100 includes a first storage chamber 1 and a second storage chamber 2.

The first storage chamber 1 and the second storage chamber 2 are thermally isolated. The first storage chamber 1 and the second storage chamber 2 may be adjacently disposed or separated by another storage chamber.

The refrigerator 100 includes a refrigerating system 3 to cool the first storage chamber 1 and the second storage chamber 2. In an exemplary embodiment, the refrigeration system 3 includes a compressor 4, a condenser 5, an expansion device (not shown in fig. 1), a fluid control unit 7, and first and

second evaporators

81 and 82 connected by a line carrying refrigerant. The first evaporator 81 is used to cool the first storage chamber 1, and the second evaporator 82 is used to cool the second storage chamber 2.

The refrigerant flows from the compressor 4 to the first evaporator 81 and the second evaporator 82 through the condenser 5. The arrows on the lines connecting the various components in fig. 1 schematically show the direction of flow of the refrigerant.

In an exemplary embodiment, the temperature of the second storage chamber 2 is higher than that of the first storage chamber 1. For example, the first storage chamber 1 is a freezing chamber, and the second storage chamber 2 includes a storage chamber of a non-freezing temperature region. For example, the set temperature range of the second storage chamber 2 may be selected from any range of-4 to 12 degrees, such as 2 to 8 degrees celsius, or 2 to 12 degrees celsius, -2 to 2 degrees celsius, -4 to 4 degrees celsius, 0 to 2 degrees celsius, and the like.

As shown in fig. 1, the refrigerant output from the condenser 5 flows into the first evaporator 81 through the first refrigeration line 31. The refrigerant output from the condenser 5 flows into the second evaporator 82 through the second refrigeration line 32. The inlet ends of the first refrigeration line 32 and the second refrigeration line 32 are connected in parallel.

The fluid control unit 7 serves to selectively deliver the refrigerant output from the condenser 5 to the first refrigeration line 31 and/or the second refrigeration line 32. A fluid control unit 7 is located downstream of the condenser 5.

A dryer 63 may be provided between the fluid control unit 7 and the condenser 5. In this embodiment, the first refrigeration line 31 and the second refrigeration line 32 are connected in parallel in the dryer 63.

The fluid control unit 7 may include a first shut-off valve 71 located in the first refrigeration line 31 to control the opening and closing of the first refrigeration line 31. When the first cutoff valve 71 opens the first refrigeration line 31, the refrigerant output from the compressor 4 may be supplied to the first evaporator 81 located downstream of the first refrigeration line 31 to cool the first storage chamber 1 corresponding to the first evaporator 81. The first cutoff valve 71 is located between the dryer 63 and the first evaporator 81.

The fluid control unit 7 may comprise a second shut-off valve 72 located in the second refrigeration line 32 to control the second refrigeration line 32. When the second cutoff valve 72 opens the second refrigeration line 32, the refrigerant output from the compressor 4 may be supplied to the second evaporator 82 located downstream of the second refrigeration line 32, so that the second storage chamber 2 corresponding to the second evaporator 82 is cooled. The second shut-off valve 72 is located between the dryer 63 and the second evaporator 82.

The refrigerator 100 may include a first fan 121 for the first storage chamber 1, and a second fan 122 for the second storage chamber 2. When the first storage chamber 1 is cooled, the first fan 121 is operated. When the second storage chamber 2 is cooled, the second fan 122 is operated.

The refrigerator 100 may include a third fan 51 disposed near the condenser 5 to improve heat dissipation efficiency of the condenser 5.

Fig. 2 is a refrigeration system 3a for a refrigerator 100 according to another embodiment of the present invention. The main difference between the refrigeration system 3a and the refrigeration system 3 shown in fig. 1 is the fluid control unit.

As shown in fig. 2, the refrigeration system 3a includes a compressor 4a, a condenser 5a, a dryer 6a, a fluid control unit 7a, and a first evaporator 81a and a second evaporator 82a located downstream of the fluid control unit 7 a. A first expansion device 61a may be provided between the first evaporator 81a and the fluid control unit 7a, and a second expansion device 62a may be provided between the second evaporator 82a and the fluid control unit 7 a.

The refrigeration system 3a may include a first fan 121a for the first storage chamber 1, and a second fan 122a for the second storage chamber 2. The refrigeration system 3a may include a third fan 51a disposed near the condenser 5a to improve heat dissipation efficiency of the condenser 5 a.

The fluid control unit 7a includes a rotary valve 71 a. The rotary valve 71a includes a first outlet communicating with the first refrigeration line 31a and a second outlet through which the second refrigeration line 32a is connected. The first refrigeration line 31a and the second refrigeration line 32a are connected in parallel by the rotary valve 71 a.

The rotary valve 71a may comprise a stepper motor, and the opening and closing of the first outlet and the second outlet is determined by the position of the stepper motor. By controlling the stepping motor of the rotary valve 71a, four cases of opening only the first outlet, opening only the second outlet, opening both the first outlet and the second outlet, and closing both the first outlet and the second outlet can be achieved.

When only the first outlet is opened, the refrigerant output from the compressor 4a may be supplied to the first evaporator 81a through the first refrigeration line 31a after passing through the condenser 5 a. The refrigerant evaporates in the first evaporator 81a, and the first storage chamber 1 is cooled.

When only the second outlet is opened, the refrigerant output from the compressor 4a may be supplied to the second evaporator 82a through the second refrigeration line 32 a. The refrigerant evaporates in the second evaporator 82a, and the second storage chamber 2 is cooled.

When both the first outlet and the second outlet are open, the refrigerant output from the compressor 4a may be supplied to the first evaporator 81a through the first refrigeration line 31a and the second evaporator 82a through the second refrigeration line 32a in parallel. The refrigerant is evaporated in the first evaporator 81a and the second evaporator 82a, respectively, and the first storage chamber 1 and the second storage chamber 2 can be cooled at the same time.

Fig. 3 is a refrigeration system 3b for the refrigerator 100 according to another embodiment of the present invention. As shown in fig. 3, the refrigeration system 3a includes a compressor 4b, a condenser 5b, a dryer 63b, a fluid control unit 7b, and a first evaporator 81b and a second evaporator 82b located downstream of the fluid control unit 7 b. The first evaporator 81b is used to cool the first storage chamber 1, and the second evaporator 82b is used to cool the second storage chamber 2.

A first expansion device 61b may be provided between an inlet end of the first evaporator 81b and an outlet end of the fluid control unit 7b, and a second expansion device 62b may be provided between an inlet end of the second evaporator 82b and an outlet end of the fluid control unit 7 b.

The fluid control unit 7b may have the same configuration as the fluid control unit 7a and therefore will not be heavily described here.

The refrigerating system 3b may include a first fan 121b for the first storage chamber 1, and a second fan 122b for the second storage chamber 2. The refrigeration system 3b may further include a third fan 51b disposed near the condenser 5b to improve the heat dissipation efficiency of the condenser 5 b.

Unlike the embodiment of fig. 2, in the embodiment shown in fig. 3, the refrigerant output from the second evaporator 82b is returned to the compressor 4b via the first evaporator 81b, which is advantageous for improving the refrigerating efficiency of the refrigerating system. This advantage is particularly evident when the first evaporator 81b is refrigerating for the freezer compartment and the second evaporator 82b is refrigerating for the cold storage warm zone.

When the refrigerant is supplied only to the first refrigeration line 31b of the first refrigeration line 31b and the second refrigeration line 32b by controlling the fluid control unit 7b, the refrigerant is evaporated in the first evaporator 81b to cool the first storage chamber 1.

When the refrigerant is supplied only to the second refrigerating line 32b of the first and

second refrigerating lines

31b and 32b, the second storage chamber 2 is cooled. Sometimes, the incompletely evaporated refrigerant discharged from the second evaporator 32b may be evaporated in the first evaporator 81b to improve the efficiency of the refrigeration system 3 b.

When the rotary valve 71b simultaneously opens the first and

second refrigeration lines

31b and 32b to simultaneously supply the refrigerant to the first and

second refrigeration lines

31b and 32b in parallel, the first and

second storage chambers

1 and 2 are simultaneously cooled.

Referring to fig. 4 in conjunction with fig. 1 to 3, the refrigerator 100 may include a first temperature detecting unit 91 for detecting the temperature of the first storage chamber 1 and a second temperature detecting unit 92 for detecting the temperature of the second storage chamber 2. The first and second

temperature detection units

91 and 92 may include at least one temperature sensor, respectively.

In one exemplary embodiment, the first and second

temperature detection units

91 and 92 include at least two temperature sensors, respectively. The temperatures of the first storage chamber 1 and the second storage chamber 2 may be calculated by at least two temperature sensors, respectively.

The refrigerator 100 may include an input unit 10 to receive a user input. The input unit 10 may receive a set temperature T of a user with respect to the first storage chamber 1_set1And the set temperature T of the second storage chamber 2_set1. Usually, a set temperature T of a storage room_set1Is the user's desired temperature for the storage compartment.

The refrigerator 100 includes a control unit 11. The control unit 11 is coupled to the first temperature detection unit 91, the second temperature detection unit 92 and the input unit 10 as well as to the

refrigeration systems

3, 3a, 3 b. The control unit 11 controls the operation of the

compressors

4, 4a, 4b, the

fluid control units

7, 7a, 7b, the

first fans

121, 121a, 121b, the

second fans

122, 122a, 122b, and the

third fans

51, 51a, 51b of the

refrigeration systems

3, 3a, 3b based on the feedback from the first temperature detection unit 91 and the second temperature detection unit 92.

Environmental parameters such as ambient temperature and/or ambient humidity may also be input parameters for the control unit 11 to control the refrigeration system 3. The refrigerator 100 may include an ambient temperature sensor 93 to detect a temperature of an environment in which the refrigerator 100 is located. The refrigerator 100 may include an ambient humidity sensor (not shown) to detect the humidity of the environment in which the refrigerator 100 is located.

In an exemplary embodiment, at least a portion of the input unit 10 and/or the control unit 11 may be provided on the main body 101 of the refrigerator 100 and/or a door (not shown) to close the storage chamber.

In another embodiment, the input unit 10 and/or the control unit 11 of the refrigerator 100 are at least partially provided in a remote device independent from the main body 101/the outside of the refrigerator door. For example, the user can set the set temperatures of the first storage chamber 1 and the second storage chamber 2 through a remote terminal. As another example, the

refrigeration systems

3, 3a, 3b are controlled based on instructions from the remote control unit 11 by transmitting temperature information obtained by the temperature detection unit provided to the main body 101 to the control unit 11 located at the remote server.

Control unit 11 and set temperature T of first storage room 1 inputted by user_set1And the set temperature T of the second storage chamber 2_set1The

refrigeration systems

3, 3a, 3b are controlled in association. For simplicity of description, the relationship between the components for the refrigerator 100 will be described below, with the refrigeration system 3 as a representative.

The input unit 10 is adapted to receive a set temperature T of the first storage chamber 1 input by a user_set1And the set temperature T of the second storage chamber 2_set1Thereby obtaining the temperatures that the user wants to obtain with respect to the first storage chamber 1 and the second storage chamber 2.

The user can set the temperature T of the first storage chamber 1 as desired_set1And the set temperature T of the second storage chamber 2_set1The setting is performed. After the user sets the temperature of the first storage chamber 1 or the second storage chamber 2, if the input unit 10 does not receive a new input about the set temperature from the user, the original set temperature is maintained.

The control unit 11 may be set according to the set temperature T of the first storage chamber 1_set1Determining a stop temperature of the first storage chamber_Tstop1(hereinafter referred to as "first stop temperature_Tstop1"), first stop temperature_Tstop1Lower than the set temperature T of the first storage chamber 1_set1. When the temperature of the first storage chamber 1 falls to a first stop temperature_Tstop1When the control unit 11 determines that the refrigeration system 3 should stop cooling the first storage chamber 1.

According to the set temperature T of the second storage chamber 2_set1The control unit 11 may determine a stop temperature of the second storage chamber 2_Tstop2(hereinafter referred to as "second stop temperature_Tstop1"), a second stop temperature_Tstop2Lower than the set temperature T of the second storage chamber 1_set1. When the temperature of the second storage chamber 2 falls to a second stop temperature_Tstop2When this occurs, the control unit 11 determines that the refrigeration system 3 should stop cooling the second storage chamber 2.

It should be understood that the first stop temperature_Tstop1And a second stop temperature_Tstop2Can be respectively only according to the corresponding set temperature T_set1And T_set2But is not limited to such an embodiment. In other embodiments, in addition to the set temperature input by the user, other parameters such as the ambient temperature, the structural coefficients of the first and second storage compartments may be used as adjustment coefficients to determine the first stop temperature_Tstop1And a second stop temperature_Tstop2。

The control unit 11 may be set according to the set temperature T of the first storage chamber 1_set1Determining a boot temperature of a first storage compartment_Tstart1(hereinafter referred to as "first boot temperature_Tstart1") according to any of the preceding claims, wherein, when the first storage compartment 1 is emptyThe temperature is higher than the first starting temperature_Tstart1At this time, the control unit 11 confirms that the refrigeration system 3 needs to refrigerate the first storage room 1.

When the compressor 4 is operated and the fluid control unit 7 turns on the first refrigeration line 31, the refrigerant may be supplied to the first evaporator 81 and the first storage chamber 1 may be cooled.

In an exemplary embodiment, the control unit 11 adjusts the speed of the compressor 4 such that the temperature of the first storage chamber 1 tends to be higher than the stop temperature T of the first storage chamber 1_stop1Target temperature T of_target1Thereby keeping the compressor 4 running.

For example, when the temperature of the first storage chamber 1 reaches the target temperature T of the first storage chamber 1_target1Then, the compressor 4 maintains the first storage chamber 1 at the target temperature T of the first storage chamber 1_target1The required cold quantity is matched with the running speed. The temperature of the first storage chamber 1 is maintained at the target temperature T for a long time without interference of external factors_target1Are possible.

Target temperature T of the first storage chamber 1_target1Can be adjusted according to the set temperature T of the first storage chamber 1_set1And (4) determining. Target temperature T of the first storage chamber 1_target1May be the set temperature T of the first storage chamber 1_set1. There is a possibility that the temperature of the first storage chamber 1 is maintained at the set temperature T of the first storage chamber 1 for a long time_set1Or a constant temperature T of the first storage chamber 1_set1The micro-amplitude fluctuates so that the user's desire is satisfied more precisely.

In a deteriorated embodiment, the target temperature T of the first storage chamber 1_target1Can approach the set temperature T of the first storage chamber 1_set1. For example, the target temperature T of the first storage chamber 1_target1Can be matched with the set temperature T of the first storage chamber 1_set1Within plus or minus 0.3 k.

The temperature of the first storage chamber 1 can be made to approach the target temperature T of the first storage chamber 1 by adjusting the speed of the compressor 4 in association with the temperature of the first storage chamber 1_target1. Due to the target temperature T of the first storage chamber 1_target1Is higher than that ofA stopping temperature_Tstop2While there is a refrigeration requirement, it is expected that the compressor 4 will remain operational for a long period of time. The temperature of the first storage chamber 1 is maintained to be the target temperature T of the first storage chamber 1 by adjusting the speed of the compressor 4_target1The temperature of the first storage chamber 1 can be maintained at a desired temperature, for example, at a set temperature T of the first storage chamber 1 with high accuracy_set1。

By adjusting the speed of the compressor 4 in real time based on the temperature of the first storage chamber 1 obtained by the first temperature detection unit 91, it is advantageous to adjust the speed of the compressor 4 to a target temperature T at which the first storage chamber 1 is substantially maintained at the first storage chamber 1 after a period of operation_target1The degree of matching.

It should be understood that when the temperature detecting unit detects the temperature of the storage chamber, if the temperature detecting unit cannot truly represent the actual temperature of the storage chamber due to the position relationship, that is, if there is a difference between the detected value obtained by the temperature detecting unit and the actual temperature of the storage chamber, it is common practice to correct the detected temperature or the actual temperature so that the detected temperature or the actual temperature can be compared under a unified standard. For example, the control unit corrects the detected value obtained by the temperature detection unit to its corresponding actual temperature, or the control unit corrects the actual temperature that can be sensed by the user (e.g., a target temperature displayed on a user interface, an actual temperature in the storage chamber) to be under the same standard as the detected value of the temperature detection unit. For example, the control means compares the temperature obtained by the corrected temperature detection means with a temperature value under an actual temperature standard (for example, a numerical value of a set temperature of the storage room displayed to the user). For another example, the control unit converts the actual temperature that can be sensed by the user and then compares the converted actual temperature with the temperature obtained by the temperature detection unit. Correspondingly, the shutdown temperature and the startup temperature of the storage room can also be determined according to the value of the converted set temperature in the control unit so as to be compared with the detected temperature obtained by the temperature detection unit. Therefore, the "temperature of the first/second storage chamber", "set temperature of the first/second storage chamber", "target temperature of the first/second storage chamber", "starting temperature of the first/second storage chamber", and "stopping temperature of the first/second storage chamber" should be under the same standard, but not limited to, a detection temperature standard or an actual temperature standard.

Adjusting the speed of the compressor 4 in association with the temperature of the first storage chamber 1 may include: reducing the speed of the compressor 4 to bring the temperature of the first storage chamber 1 from the target temperature T of the first storage chamber 1_target1And stop temperature of the first storage chamber 1_Tstop1Towards the target temperature T of the first storage chamber 1_target1And (4) rising. Thereby, the compressor 4 maintains the temperature of the first storage chamber 1 at the target temperature T_target1It is possible to operate for a long time at a speed matched with the required refrigeration capacity. This is advantageous not only in reducing power consumption but also in improving the accuracy of temperature control of the first storage chamber 1.

Based on the temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1_target1The temperature difference therebetween to adjust the speed of the compressor 4 may include: based on the average temperature of the first storage compartment 1 or the current instantaneous temperature of the first storage compartment 1 and the target temperature T of the first storage compartment 1 during the current time interval_target1The temperature difference therebetween to regulate the speed of the compressor 4.

The current instantaneous temperature of the first storage chamber may be a recently obtained temperature of the first storage chamber. The average temperature in the current time interval may comprise an average of the first N sampled temperatures including the most recently obtained instantaneous temperature. N may for example be between 3 and 30.

The speed of the compressor is adjusted according to the average temperature of the plurality of sampled temperatures of the first storage chamber 1 in the current time interval, which is advantageous for the compressor 4 to operate more smoothly. Adjusting the speed of the compressor in dependence on the instantaneous temperature of the first storage chamber then facilitates a faster reaction of the compressor 4 to adjust the temperature of the storage chamber.

In some embodiments, adjusting the speed of the compressor 4 according to the temperature of the first storage chamber 1 may include: the compressor speed is determined based on a base speed S0 and an adjustment speed Sv determined according to the temperature of the storage chamber. For example, the compressor speed may be equal to S0+ Sv.

In some embodimentsThe base speed S0 may be the ambient temperature and/or the target temperature T of the first storage compartment_target1Set temperature T_set1The speed of the match. Accordingly, the base speed S0 may be based on the ambient temperature and/or the target temperature T of the first storage compartment 1_target1But may vary.

The base speed S0 may be preset. For example, the temperature may be set according to the current ambient temperature and the target temperature T of the first storage chamber_target1Set temperature T_set1And a base speed S0 corresponding thereto is determined.

The adjusting speed Sv may be based on the temperature T of the first storage chamber and the target temperature T_target1The temperature difference therebetween. May be based on the temperature of the first storage chamber and the target temperature T of the first storage chamber_target1The temperature difference therebetween to determine whether to operate at a speed higher than the base speed S0 or lower than the base speed S0.

For example, when the temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1_targetThe temperature difference therebetween is negative (when the temperature of the storage chamber 1 is lower than the target temperature T)_target) At a speed lower than the base speed S0. Otherwise, the operation is performed at a speed higher than the base speed S0.

It was proved by our experiments that on the basis of the base speed S0, a temperature according to the first storage compartment and the target temperature T of the first storage compartment 1 is used_target1The speed of the compressor 4 is determined by determining the regulation speed Sv based speed S0 according to the temperature difference therebetween, which is advantageous for achieving that the temperature of the first storage chamber 1 more rapidly approaches the target temperature T_target1。

The temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1_target1The temperature difference therebetween may be in a linear relationship with the adjustment speed Sv. In alternative embodiments, the temperature of the first storage chamber 1 and the target temperature T may be varied according to_target1The temperature difference therebetween is within a range to determine the corresponding adjustment speed Sv.

The adjustment speed Sv may be determined, for example, by increasing/decreasing a predetermined speed amplitude modulation per a predetermined temperature difference.

For example, the speed of m is increased or decreased per n temperature difference, n may be selected from +/- (0.1k to 0.3k), and m may be selected from 150 rpm to 300 rpm, for example.

The control unit 11 may be based on the set temperature T of the second storage chamber 2_set1Determining the starting temperature of the second storage compartment 2_Tstart2(hereinafter referred to as "second boot temperature_Tstart2"). Wherein, when the temperature of the second storage chamber 1 is higher than the second starting temperature_Tstart2At this time, the control unit 11 confirms that the refrigeration system 3 needs to refrigerate the second storage chamber 2.

When the compressor 4 is operated and the fluid control unit 7 turns on the second refrigeration line 32, the refrigerant may be supplied to the second evaporator 82 and the second storage chamber 2 may be cooled. In the embodiment of the present invention, the control unit 11 stops the temperature at the second stop temperature_Tstop2Cooling the second storage chamber 2 as a target temperature of the second storage chamber 2 when the temperature of the second storage chamber 2 is lowered to a second stop temperature_Tstop2When this occurs, the cooling of the second storage chamber 2 is stopped.

When only the second storage chamber 2 has a cooling demand, the compressor 4 may be operated at a predetermined speed or in accordance with a predetermined speed pattern to bring the second storage chamber 2 to the second stop temperature_Tstop2. That is, when the compressor 4 cools only the second storage chamber 2, the speed of the compressor 4 during operation may not be adjusted in real time based on the temperature of the second storage chamber 2 obtained by the second temperature detecting unit 92.

When both the first storage chamber 1 and the second storage chamber 2 have a cooling demand, the first storage chamber 1 and the second storage chamber 2 may be cooled simultaneously. The first storage chamber 1 and the second storage chamber 2 may be cooled simultaneously by supplying refrigerant to the first evaporator 81 and the second evaporator 82 simultaneously.

Fig. 5 illustrates a flowchart of an operating method for the refrigerator 100 according to an embodiment of the present invention.

As shown in fig. 5, in step S51, the set temperature T of the first storage chamber 1 input by the user is received_set1And the set temperature of the second storage chamber 2_Tset2. If the set temperature T of the first storage chamber 1_set1Or the set temperature of the second storage chamber 2 is not adjustable, S51 may be omittedBut not shown.

In step S52, according to the set temperature T of the first storage chamber 1_set1Determining a first stopping temperature T_stop1According to the set temperature of the second storage chamber_Tset1Determining a second stopping temperature T_stop2。

In the simultaneous cooling mode in which the compressor 4 is operated to simultaneously cool the first storage chamber 1 and the second storage chamber 2, the speed of the compressor 4 is adjusted to bring the temperature of the first storage chamber 1 toward the target temperature T of the first storage chamber 1 in step S53_target1(ii) a And at a second stop temperature_Tstop2Cooling the second storage chamber 2 as a target temperature of the second storage chamber 2 when the temperature of the second storage chamber 2 is lowered to a second stop temperature_Tstop2When this occurs, the cooling of the second storage chamber 2 is stopped. Since the compressor 4 only needs to refrigerate the second storage chamber 2 for a part of the time, it is more advantageous for the refrigeration system 3 to match the temperature of the first storage chamber 1 and the speed of the compressor 4.

In the simultaneous cooling mode for simultaneously cooling the first storage chamber 1 and the second storage chamber 2, the control unit 11 may determine the speed of the compressor 4 to bring the temperature of the first storage chamber 1 toward the target temperature T of the first storage chamber 1 based on the temperature of the first storage chamber 1 obtained by the first temperature detecting unit 91_target1。

The control unit 11 adjusting the speed of the compressor 4 in a manner correlated with the temperature of the first storage chamber 1 may include: in the simultaneous cooling mode for simultaneously cooling the first storage chamber 1 and the second storage chamber 2, at the temperature of the first storage chamber 1 and the target temperature T of the first storage chamber 1_target1The temperature difference therebetween to adjust the speed of the compressor 4 such that the temperature of the first storage chamber 1 approaches the target temperature T of the first storage chamber 1_target1。

In one embodiment, in the mode of simultaneously cooling the first storage chamber 1 and the second storage chamber 2, the temperature of the second storage chamber 2 may not be used as a parameter for adjusting the speed of the compressor 4. That is, when the first storage chamber 1 and the second storage chamber 2 are cooled simultaneously, the speed of the compressor 4 is adjusted based on the first storage chamber 1 temperature out of the first storage chamber 1 temperature and the second storage chamber 2 temperature. I.e. whether or not the second storage chamber 2 is at the same timeCooled, the control unit 11 adjusts the speed of the compressor 4 according to the first storage chamber 1 of the temperature of the first storage chamber 1 and the temperature of the second storage chamber 2 to make the temperature of the first storage chamber 1 approach the target temperature T of the first storage chamber 1_target1。

Therefore, when the first storage chamber 1 and the second storage chamber 2 are cooled at the same time, the calculation method of the compressor speed may be the same as that when only the first storage chamber 1 is cooled.

Due to the target temperature T of the first storage chamber 1_target1Lower than the set temperature T of the second storage chamber 2_set2The resistance to supply of the refrigerant to the second evaporator 82 is larger than the resistance to supply of the refrigerant to the first evaporator 81. In order to ensure that the second storage chamber 2 can also be cooled in time when the speed of the compressor 4 is adjusted with the temperature of the first storage chamber 1, in one embodiment, supplying refrigerant to the first and

second refrigeration lines

31 and 32 connected in parallel includes preferentially supplying refrigerant to the second refrigeration line 32 of the first and

second refrigeration lines

31 and 32.

In the embodiment in which the first refrigeration line 31 and the second refrigeration line 32 are connected in parallel in the dryer 63, the dryer 63 is configured to preferentially supply refrigerant to the second refrigeration line 32 of the first refrigeration line 31 and the second refrigeration line 32 when both of them are open.

Fig. 6 illustrates an exemplary embodiment of a dryer 63 suitable for use in the refrigeration system 3 of fig. 1. As shown in fig. 6, the dryer 63 located downstream of the condenser 5 has a drying chamber 631, and the inlet of the first refrigeration line 31 and the inlet of the second refrigeration line 32 are located in the drying chamber 631. The minimum refrigerant accumulation level in the drying chamber 631 required for the inlet of the second refrigeration line 32 to take refrigerant is lower than the minimum refrigerant accumulation level in the drying chamber 631 required for the inlet of the first refrigeration line 31 to take refrigerant.

Specifically, both the inlet of the first refrigeration line 31 and the inlet of the second refrigeration line 32 have a height difference in the direction of gravity so that the second refrigeration line 32 preferentially obtains the refrigerant. In the embodiment shown in fig. 6, the first and

second refrigeration lines

31 and 32 are located above the input pipe 632 of the dryer 3, and the inlet of the second refrigeration line 32 is located at a position lower than the inlet of the first refrigeration line 31 to preferentially obtain the refrigerant accumulated in the drying chamber 631.

In the embodiment shown in fig. 7, the first refrigeration line 31 and the second refrigeration line 32 are located below the input pipe 632, and the inlet of the second refrigeration line 32 is lower than the inlet of the first refrigeration line 31 to preferentially obtain the refrigerant accumulated in the drying chamber 631.

In the embodiment shown in fig. 6 and 7, the first output pipe and the second output pipe of the dryer extend into the drying chamber, and the refrigerant in the drying chamber preferentially supplies the refrigerant to the second refrigeration pipeline of the first refrigeration pipeline and the second refrigeration pipeline.

In one or some alternative embodiments, it is also possible that the first refrigeration line 31 and the second refrigeration line 32 are connected in parallel outside the drying chamber of the dryer. In this case, the refrigerant discharged out of the drying chamber preferentially supplies the refrigerant to the second refrigeration line of the first refrigeration line and the second refrigeration line. The second refrigeration circuit 32 can be preferentially supplied with the refrigerant by appropriately arranging the inlets of the first refrigeration circuit 31 and the second refrigeration circuit 32 outside the drying chamber. For example, the inlet of the second refrigeration line 32 is located upstream of the inlet of the first refrigeration line 31 to obtain refrigerant more preferentially.

Fig. 8 illustrates a flowchart of a method for a refrigerator according to an embodiment of the present invention. As shown in fig. 8, in step S71, the first temperature detection unit 91 detects the temperature of the first storage chamber 1, and the second temperature detection unit 92 detects the temperature of the second storage chamber 2.

In step S72, the control unit 11 determines whether or not the first storage room 1 has a cooling request based on the information of the first temperature detection unit 91.

For example, when the temperature of the first storage chamber 1 reaches the first stop temperature T_stop1When it is determined that the first storage room 1 has no cooling request. When the temperature T1 of the first storage chamber 1 reaches the first start-up temperature T_start1When it is determined that the first storage room 1 has a cooling request.

When the temperature of the first storage chamber 1 is higher than the first stop temperature T_stop1But lower than the firstStarting temperature T_start1Meanwhile, if the control unit 11 has judged that the first storage room 1 has a cooling request last time, it is determined that the first storage room 1 has a cooling request, and if the control unit 11 has judged that the first storage room 1 has no cooling request last time, it is determined that the first storage room 1 has no cooling request.

If it is determined in step S72 that the first storage room 1 has a cooling request, the compressor 4 is operated in the first speed mode in step S73. Wherein the first speed mode is a mode in which the speed of the compressor 4 is adjusted according to the temperature of the first storage chamber 1. Specifically, the speed of the compressor 4 may be adjusted according to the temperature of the first storage chamber 1 so that the temperature of the first storage chamber 1 may be at the first startup temperature T for a long time_start1And a first stop temperature T_stop1Between and towards the target temperature T of the first storage compartment 1_target1For example, the temperature of the first storage chamber 1 is slightly fluctuated to decrease to the first stop temperature T_stop1The probability of (c).

The first and

second fans

121 and 122 are operated while both the first and

second cooling ducts

31 and 32 are opened to simultaneously cool the first and

second storage compartments

1 and 2. The speeds of the first and

second fans

121 and 122 are associated with the speed of the compressor 4, and thus with the temperature of the first storage chamber 1.

If it is confirmed in step S72 that the first storage room 1 does not require cooling, it is determined in step S74 whether the second storage room 2 requires cooling.

For example, when the temperature of the second storage chamber 2 reaches the second stop temperature T_stop2It is determined that the second storage chamber 2 has no cooling request. When the temperature of the second storage chamber 2 reaches the second starting temperature T_start2When it is determined that the second storage room 2 has a cooling request.

When the temperature T2 of the second storage chamber 2 is higher than the second stop temperature T_stop2But lower than the second start-up temperature T_start2Meanwhile, if the control unit 11 has judged that the second storage room 2 has a cooling request last time, it is determined that the second storage room 2 has a cooling request, and if the control unit 11 has judged that the second storage room 2 has no cooling request last time, it is determined that the second storage room 2 has a cooling requestThe storage compartment 2 has no cooling request.

If the second storage room 2 does not require cooling either, the compressor 4 is not operated or stopped in step S75. If it is judged in step S74 that the second storage chamber 2 requires cooling, the compressor 4 is operated in the second speed mode in step S76. Wherein the second speed mode is that the speed of the compressor 4 is determined in a manner independent of the temperature of the first storage chamber 1. In the second speed mode, the speed of the compressor 4 may be fixed or may be set according to the set temperature T of the second storage chamber 2_set2Ambient temperature and/or the temperature of the second storage compartment 2.

Fig. 9 shows a schematic diagram of the refrigerator 100 according to one embodiment of the present invention performing the method shown in fig. 8 to obtain characteristics of the first storage compartment temperature, the second storage compartment temperature, and the compressor speed. As shown in fig. 9, the temperature curve T1 of the first storage compartment 1 is at the first start temperature T_start1And a first stop temperature T_stop1And around the target temperature T of the first storage compartment 1_target1(the temperature T is set in this embodiment)_set1) Small fluctuations. The compressor 4 remains running and the speed fluctuates around a base speed S0. The temperature profile T2 of the second storage compartment 2 is at the second start-up temperature T_start2And a second stop temperature T_stop2To change between.

At time T1, the temperature of the second storage chamber 2 reaches the second stop temperature T_stop2The refrigeration system 3 stops cooling the second storage chamber 2. This can be achieved by the fluid control unit 7 closing the second refrigeration line 32 to stop the supply of refrigerant to the second evaporator 82.

Between time t1 and time t2, the compressor 4 operates for the first storage chamber 1. The temperature of the first storage chamber 1 gradually decreases and the speed of the compressor 4 decreases accordingly. When the temperature of the first storage chamber 3 reaches the set temperature T of the first storage chamber 1_set1At time t11, the speed S of the compressor 4 is equal to or close to the base speed S0 of the compressor 4.

As the temperature T1 of the first storage chamber 1 is gradually decreased, the speed of the compressor 4 is also gradually decreased. After time t11, the temperature of the first storage chamber 1 enters the first storage chamber 1Set temperature T_set1And a first stop temperature T_stop1Meanwhile, this causes the compressor 4 to operate at a speed lower than the base speed S0 to reduce the cooling speed to the first storage chamber 1 in an attempt to change the temperature of the first storage chamber 1 to continue toward the first stop temperature T_stop1A tendency to decrease so that the temperature of the first storage chamber 1 can be changed from the set temperature T of the first storage chamber 1_set1And a first stop temperature T_stop1Set temperature T to the first storage chamber 1_set1And (4) rising.

In one embodiment, when the temperature of the first storage chamber 1 continues to rise after the set temperature Tset1 of the first storage chamber 1 is reached at time T21, the compressor 4 is operated at a speed higher than the base speed S0 so that the temperature of the first storage chamber 1 can be raised from the first start-up temperature T_start1And the set temperature T of the first storage chamber 1_set1Towards the set temperature T of the first storage chamber 1_set1And returning. Thereby, the temperature of the first storage chamber 1 can be made to surround the set temperature T_set1The micro-amplitude fluctuates.

If the temperature of the second storage chamber 2 reaches the second starting temperature T at the time T2_start2The second storage compartment 2 has a refrigeration requirement. The fluid control unit 7 opens the second refrigeration line 32. The refrigeration system 3, in addition to keeping the first storage chamber 1 refrigerated, also refrigerates the second storage chamber 2.

Since the refrigerant is branched, the cooling speed of the first storage chamber 1 is reduced while the compressor 4 is operated at the current speed, which causes the temperature of the first storage chamber 1 to gradually increase. Since the speed of the compressor 4 can be adjusted based on the temperature of the first storage chamber 1, the speed of the compressor 4 is gradually increased. As shown in fig. 9, the temperature of the second storage chamber 2 is changed from the second power-on temperature T from the time T2 to the time T3_start2Is cooled to a second stop temperature T_stop2. In this process, the temperature of the first storage chamber 1 may be from the set temperature T of the first storage chamber 1_set1Is raised below to the set temperature T of the first storage chamber 1_set1And (4) upward.

At time T3, the temperature of the second storage chamber 2 reaches the second stop temperature T_stop2When the second refrigerant pipe is closed by the fluid control unit 7Line 32 stops providing refrigerant to the second evaporator 82. As the cooling load is reduced, the cooling speed of the first storage chamber 1 is increased while the compressor 4 is operated while maintaining the current speed, resulting in a gradual drop in the temperature of the first storage chamber 1, with a consequent gradual reduction in the speed of the compressor 4.

The temperature of the second storage chamber 2 gradually increases between the time T3 and the time T4, and when the temperature of the second storage chamber 2 reaches the second starting temperature T_start2In the meantime, the refrigerating system 3 again refrigerates the second storage chamber 2 until the second storage chamber 2 is cooled to the second stop temperature T_stop2。

In a stage in which the first storage chamber 1 and the second storage chamber 2 are cooled simultaneously, the compressor 4 adjusts its operating speed in accordance with the temperature of the first storage chamber 1 so that the temperature of the first storage chamber 1 is at the first start-up temperature T for a long time_start1And a first stop temperature T_stop1And the speed of the compressor 4 is adjusted by the temperature of the first storage chamber 1 so that the temperature of the first storage chamber 1 can be maintained or slightly surrounded by the set temperature T of the first storage chamber 1_set1Fluctuating. The second storage chamber 2 is switched between cooling and stopping of cooling, facilitating accurate temperature control of the first storage chamber 1.

Fig. 10 is an operation method for a refrigerator according to another embodiment of the present invention. As shown in fig. 10, in step S91, the first temperature detection unit 91 detects the temperature of the first storage chamber 1, and the second temperature detection unit 92 detects the temperature of the second storage chamber 2.

In step S92, it is determined whether or not the first storage room 1 has a cooling request.

If it is determined in step S92 that the first storage room 1 has a cooling request, it is judged in step S93 whether the second storage room 2 has a cooling request.

If it is confirmed in step S93 that the second storage chamber 2 has no cooling request, the compressor 4 is operated in the first speed mode. The first speed mode is a mode in which the speed of the compressor 4 is adjusted according to the temperature of the first storage chamber 1. Specifically, the speed of the compressor 4 may be adjusted according to the temperature of the first storage chamber 1 so that the temperature of the first storage chamber 1 may be at the first startup temperature T for a long time_start1And a first stop temperature T_stop1And maintains or surrounds the set temperature T of the first storage chamber 1_set1Fluctuating.

If it is confirmed in step S93 that the second storage chamber 2 also requires cooling, the compressor 4 is operated in the third speed mode. The third speed mode may be a variable or fixed speed increment based on the first speed mode, which is determined according to the temperature of the first storage chamber 1 and is suitable for bringing the temperature of the first storage chamber 1 to the set temperature T of the first storage chamber 1_set1And the calculated compressor speed. The speed increment may be by a predetermined fixed speed value or a variable speed value which is variable depending on the ambient temperature and/or the temperature of the second storage compartment 2. Because the first storage chamber 1 and the second storage chamber 2 refrigerate simultaneously, the load of the compressor 1 is increased, and the speed is increased on the basis of the first speed mode, so that the second storage chamber 2 is cooled as soon as possible, and the set temperature T of the first storage chamber 1 is kept or tends to be increased_set1The reliability of (2).

If it is confirmed that the first storage room 1 has no cooling request in step S92, it is judged whether the second storage room 2 has a cooling request in step S96. If it is confirmed in step S96 that the second storage chamber 2 has a cooling request, the compressor 4 is operated in the second speed mode. In the second speed mode, the speed of the compressor 4 may be fixed or may be set according to the set temperature T of the second storage chamber 2_set1Ambient temperature and/or the temperature of the second storage compartment 4. The compressor 4 is operated with the object of cooling the second storage chamber 2 to the second stop temperature T_stop2And then stops cooling the second storage chamber 2.

If it is confirmed in step S96 that the second storage chamber 2 has no cooling request either, the compressor 4 stops operating or remains in a non-operating state.

After step S95, S94, or S96, return to step S91, and so on.

FIG. 11 illustrates the refrigerator 100 performing the method of FIG. 10 to characterize the first storage compartment temperature, the second storage compartment temperature, and the compressor speed according to one embodiment of the present inventionSchematic representation of (a). As shown in fig. 11, until time T1, the temperature of the first storage chamber 1 is substantially stabilized at the set temperature T of the first storage chamber 1_set1And therefore the compressor 4 operating in the first speed mode also maintains a substantially steady speed operation. When the temperature of the second storage chamber 2 reaches the second starting temperature T at the time T1_start2The refrigeration system 3 starts to refrigerate both the first storage chamber 1 and the second storage chamber 2, and the compressor 4 is operated in the third speed mode. In this embodiment, at times t1 and t2, the speed of the compressor 4 is increased by a fixed speed increment Sd based on the first speed pattern while the first storage chamber 1 and the second storage chamber 2 are simultaneously cooled. When the second storage chamber 2 reaches the second stop temperature T at time T2_stop2When this occurs, the cooling of the second storage chamber 2 is stopped. The compressor 4 is operated in the first speed mode until the time t3, the second storage chamber 2 again needs to be cooled.

Although fig. 11 shows that the speed of the compressor 4 and the temperature of the first storage chamber 1 are substantially stabilized when the compressor 4 cools only the first storage chamber 1 in an ideal state. However, it should be understood that the temperature of the first storage chamber 1 surrounds the set temperature T of the first storage chamber 1_set1It is also possible that the wave may fluctuate or remain substantially stable after a period of fluctuation.

In the embodiment shown in fig. 9 and 11, the speed of the compressor 4 is calculated from the currently measured temperature of the first storage chamber 1. This embodiment can adjust the speed of the compressor 4 in real time with the current temperature of the first storage chamber 1 in a very timely manner, and has a disadvantage in that if the temperature of the first storage chamber 1 suddenly and rapidly fluctuates, the speed of the compressor 4 rapidly changes, and noise may be generated.

In another embodiment, the speed of the compressor 4 may be adjusted in real time based on the average temperature of the first storage chamber 1 over a sampling interval. The speed of the compressor 4 is adjusted using, for example, an average value of the temperatures of the first N (N is greater than or equal to 2) first storage chambers 1 including the current temperature.

Fig. 12 is a schematic view illustrating the variation of the speed of the compressor, the temperature of the first storage chamber 1, and the temperature of the second storage chamber 2 according to the method of operating the refrigerator 100 of fig. 3 according to still another embodiment.

The second storage chamber 2 is intermittently cooled in an on-off manner. Specifically, when the temperature of the second storage chamber 2 rises to the second startup temperature T_start2When the second storage chamber 2 is cooled, the second storage chamber 2 reaches the second stop temperature T _stop2, cooling of the second storage chamber 2 is stopped.

Therefore, the temperature T2 of the second storage chamber is at the second start-up temperature T_start2And a second shutdown temperature T_stop2Fluctuate up and down. In the temperature drop phase, the second storage chamber 2 is cooled by the refrigeration system 3.

At the set temperature T of the first storage chamber 201_set1As the target temperature cools the first storage chamber 201, the compressor 4 can be kept operating for a long time due to the refrigeration demand of the first storage chamber 201.

In cooling the first storage chamber 201 alone or simultaneously with the first and second storage chambers 201 and 2, the temperature of the first storage chamber 201 is used to adjust the speed of the compressor 4 so that the temperature of the first storage chamber 201 approaches the target temperature of the first storage chamber 201. In this example, the temperature of the first storage chamber 201 fluctuates in a narrower range around the target temperature of the first storage chamber 201 than the fluctuation range of the temperature of the second storage chamber 2.

As shown in fig. 12, since the first storage chamber 201 has a cooling demand all the time, the compressor 4 can be kept operated for a long time.

The average temperature of the first storage chamber 201 during the current time interval is used to adjust the speed of the compressor 4. The speed of the compressor 4 is adjusted by the average temperature of the first storage chamber 201 in the current time interval, and although the speed adjustment of the compressor 4 is delayed, the problem that the speed of the compressor 4 is changed too much and/or frequently to cause noise which makes a user uncomfortable can be avoided.

In the exemplary embodiment, the average temperature of the 20 measured temperatures of the first storage chamber 201, including the current measured temperature, is used as the adjustment factor for the speed of the compressor 4.

According to the average temperature of the first storage chamber 201 in the current time interval and the temperature of the first storage chamber 201Target temperature T_target1I.e. the set temperature T_set1To determine the speed of the compressor 4.

The speed of the compressor may be controlled by the base speed S0 and according to the average temperature of the first storage chamber 201 during the current time interval and the set temperature T of the first storage chamber 201_set1The temperature difference therebetween is determined by the sum of the adjustment speeds determined. When the temperature difference is larger than zero, the adjusting speed is a positive value, otherwise, the adjusting speed is a negative value.

The base speed S0 may be based on the ambient temperature and the set temperature T of the first storage chamber 201_set1And is determined.

As shown in fig. 12, as the temperature of the first storage chamber 201 increases to the set temperature T of the first storage chamber 201_set1In the above, the speed of the compressor 4 is increased (as in the stages A0-A, B-C, D-E) to bring the temperature T1 of the first storage chamber 201 from above the set temperature T of the first storage chamber 201_set1The position of (2) is lowered. As the temperature of the first storage chamber 201 decreases to the set temperature T of the first storage chamber 201_set1Next, the speed of the compressor 4 is reduced (e.g., stages A-B, C-D) to bring the temperature T1 of the first storage chamber 201 from below the set temperature T of the first storage chamber 201_set1Is raised.

The speed increasing stage and the speed decreasing stage of the compressor 4 are alternately performed such that the temperature T1 of the first storage chamber 201 is around the set temperature T_set1The micro-amplitude fluctuates, whereby the compressor 4 is continuously operated.

In the exemplary embodiment, each speed ramp-up phase of compressor 4 (e.g., phases A0-A, B-C, and D-E) includes at least two consecutive speed increase sub-phases.

Each speed-down stage (e.g., periods a-B, periods C-D) of the compressor 4 includes at least two successive speed-down sub-stages.

The speed differences between adjacent speed sub-phases may be equal.

Gradually adjusting the speed of the compressor 4 through a plurality of sub-stages facilitates more precise adjustment of the speed of the compressor 4, thereby reducing the temperature of the first storage chamber 201 from breaching the first startup temperature T_start1And a first shutdown temperature T_stop1The temperature T1 of the first storage chamber 201 is made to surround the set temperature T of the first storage chamber 201_set1Small fluctuation is maintained even at the set temperature T of the first storage chamber 201_set1。

In the above embodiment, the temperature difference between the temperature of the first storage chamber and the target temperature of the first storage chamber is used to adjust the speed of the compressor. In an alternative embodiment, adjusting the speed of the compressor 4 in association with the temperature of the first storage chamber 1 comprises adjusting the speed of the compressor 4 in accordance with a rate of change of the temperature of the first storage chamber 1. The temperature of the first storage chamber 1 may be made to approach or change at a preset temperature change rate so that the temperature of the first storage chamber 1 approaches the target temperature T of the first storage chamber 1 by judging the comparison between the change rate of the temperature of the first storage chamber 1 and a preset temperature change rate pattern and adjusting the speed of the compressor 4 based on the comparison result_set1。

Although the refrigerator and the method for the refrigerator have been described above based on specific shapes and orientations with reference to the accompanying drawings, those skilled in the art will appreciate that modifications may be made without departing from the principles and spirit of the present disclosure. In other words, although exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.

Claims

1. A method for a refrigerator comprising a first storage compartment (1) and a second storage compartment (2), the method comprising:

according to the set temperature (T) of the first storage chamber_set1) Determining a stopping temperature (T) of the first storage compartment_stop1)，

Wherein a stop temperature of the first storage chamber is lower than a set temperature of the first storage chamber;

according to the set temperature (T) of the second storage chamber_set2) Determining a stopping temperature (T) of the second storage compartment_stop2) A stop temperature of the second storage chamber is lower than that of the second storage chamberA set temperature of the storage chamber;

while the first storage chamber is being cooled, the speed of the compressor (4, 4a, 4b) is adjusted to bring the temperature of the first storage chamber towards the target temperature (T) of the first storage chamber_target1) Wherein the target temperature is higher than a stop temperature of the first storage chamber; and

cooling the second storage chamber with the stop temperature of the second storage chamber as a target temperature of the second storage chamber to stop cooling the second storage chamber when the temperature of the second storage chamber drops to the stop temperature of the second storage chamber while the second storage chamber is cooled.

2. The method of claim 1, wherein the target temperature of the first storage compartment is determined based on a set temperature of the first storage compartment, e.g., the target temperature of the first storage compartment is equal to the set temperature of the first storage compartment.

3. The method of claim 1 or 2, wherein adjusting the speed of the compressor comprises: the speed of the compressor is reduced to raise the temperature of the first storage chamber from between the target temperature of the first storage chamber and the first storage chamber stop temperature toward the target temperature of the first storage chamber.

4. A method as claimed in claim 1, 2 or 3, characterized by sensing the temperature of the first storage chamber and adjusting the compressor speed in dependence on the temperature of the first storage chamber to bring the temperature of the first storage chamber towards the target temperature of the first storage chamber.

5. The method of claim 4, wherein adjusting the compressor speed based on the temperature of the first storage chamber comprises adjusting the compressor speed at a temperature difference between the temperature of the first storage chamber and a target temperature of the first storage chamber.

6. The method of claim 4, wherein adjusting the compressor speed based on the temperature of the first storage chamber comprises adjusting the compressor speed based on a rate of change of the temperature of the first storage chamber.

7. The method as claimed in any one of the preceding claims, wherein, while the compressor is operated to cool the first storage chamber and the second storage chamber simultaneously, the speed of the compressor is adjusted to bring the temperature of the first storage chamber toward the target temperature of the first storage chamber, and the second storage chamber is cooled with the stop temperature of the second storage chamber as the target temperature of the second storage chamber to stop cooling the second storage chamber when the temperature of the second storage chamber drops to the stop temperature of the second storage chamber.

8. The method as claimed in any one of the preceding claims, wherein the compressor is operated in a first speed mode when the compressor is operated to simultaneously cool the first storage chamber and the second storage chamber, wherein the first speed mode is to adjust an operation speed of the compressor based on a temperature of the first storage chamber out of a temperature of the first storage chamber and a temperature of the second storage chamber.

9. The method as claimed in any one of claims 1 to 7, wherein the compressor is operated in a third speed mode while the compressor is operated to simultaneously cool the first storage chamber and the second storage chamber, wherein the third speed mode is increased by an additional speed value based on the first speed mode, wherein the first speed mode is a speed of the compressor adjusted by the first storage chamber temperature among the temperature of the first storage chamber and the temperature of the second storage chamber.

10. The method as claimed in any one of the preceding claims, wherein the speed of the compressor is operated in a fixed mode or a fixed speed when the compressor is operated to cool only the second storage chamber.

11. Method according to any of the preceding claims, characterized in that when the compressor is operated to cool a first storage compartment and a second storage compartment simultaneously, a first refrigeration line (31, 31a, 31b) connected to the inlet of a first evaporator (81, 81a, 81b) for cooling the first storage compartment and a second refrigeration line (32, 32a, 32b) connected to the inlet of a second evaporator (82, 82a, 82b) for cooling the second storage compartment are supplied with refrigerant.

12. The method of claim 11, wherein supplying refrigerant to the first refrigeration circuit and the second refrigeration circuit in parallel comprises preferentially supplying refrigerant to a second refrigeration line of the first refrigeration circuit and the second refrigeration circuit.

13. The method according to claim 12, comprising a dryer (63, 63a, 63b) downstream of the condenser (5, 5a, 5b), said dryer comprising a drying chamber (631); the refrigerant in the drying cavity preferentially supplies the refrigerant to the second refrigeration pipeline of the first refrigeration pipeline and the second refrigeration pipeline, or the refrigerant discharged from the drying cavity preferentially supplies the refrigerant to the second refrigeration pipeline of the first refrigeration pipeline and the second refrigeration pipeline.

14. The method of claim 13, wherein the inlet (310) of the first refrigeration line and the inlet (320) of the second refrigeration line are located in the drying chamber, and wherein the minimum refrigerant accumulation level required by the inlet of the second refrigeration line to draw refrigerant in the drying chamber is lower than the minimum refrigerant accumulation level required by the inlet of the first refrigeration line to draw refrigerant in the drying chamber.

15. The method of any preceding claim, wherein the first storage compartment is a freezer compartment and the second storage compartment comprises a non-freezing temperature range.

16. The method as claimed in any one of claims 1 to 11, wherein in a simultaneous cooling mode in which the compressor is operated to simultaneously cool the first storage compartment and the second storage compartment, the first refrigeration line and the second refrigeration line connected in parallel are alternately supplied with a supply refrigerant so as to be used in a first evaporator for cooling the first storage compartment and a second evaporator for cooling the second storage compartment while continuously evaporating the refrigerant, wherein the first refrigeration line is connected to an inlet of the first evaporator and the second refrigeration line is connected to an inlet of the second evaporator.

17. Method according to any of the preceding claims, characterized in that a second fan (122, 122a, 122b) for the second storage compartment is operated while the compressor is operated to cool the first storage compartment and the second storage compartment simultaneously, the speed of the second fan being linked to the temperature of the first storage compartment.

18. A refrigerator (100) comprising:

a first storage chamber (1);

a second storage chamber (2);

an input unit (10) adapted to receive a set temperature of the first storage chamber and a set temperature of the second storage chamber input by a user;

a compressor (4, 4a, 4 b);

a condenser (5, 5a, 5 b);

a first evaporator (81, 81a, 81b) to cool the first storage chamber; a second evaporator (82, 82a, 82b) to cool the second storage chamber;

a first refrigeration line (31, 31a, 31b) through which refrigerant output by the condenser is supplied to the first evaporator;

a second refrigeration pipeline (32, 32a, 32b), wherein the refrigerant output by the condenser is supplied to a second evaporator through the second refrigeration pipeline, and the inlet ends of the first refrigeration pipeline and the second refrigeration pipeline are connected in parallel;

a fluid control unit (7, 7a, 7b) for selectively delivering the refrigerant outputted from the condenser to the first refrigeration circuit and/or the second refrigeration circuit; and

a control unit (11) coupled to the compressor, the input unit and the fluid control unit to cause the refrigerator to perform the method according to any one of the preceding claims.