Temperature control device for double refrigerating systems

Abstract

The utility model relates to a temperature control device with double refrigerating systems. The temperature control device comprises a first chamber, a second chamber, a first refrigerating unit, a second refrigerating unit and an electrical control system, wherein the first air outlet electric air door, the first air outlet, the third air outlet and the third air outlet electric air door are sequentially connected, and the first air outlet and the third air outlet are further connected with the air outlet of the first chamber; the second air outlet electric air door, the second air outlet, the fourth air outlet and the fourth air outlet electric air door are connected in sequence; the second air outlet and the fourth air outlet are further connected with the air outlet of the second chamber; the first return air inlet electric air door, the first return air inlet, the third return air inlet and the third return air inlet electric air door are sequentially connected, and the first return air inlet and the third return air inlet are further connected with the return air inlet of the first chamber; the second return air inlet electric air door, the second return air inlet, the fourth return air inlet and the fourth return air inlet electric air door are sequentially connected, and the second return air inlet and the fourth return air inlet are further connected with the return air inlet of the second chamber.

Description

Technical Field

[0001] The present application relates to the field of refrigerators, and in particular to a temperature control device for a dual refrigeration system. Background Art

[0002] The cooling methods of refrigerators include air cooling, direct cooling, and air-direct cooling. Among them, air cooling is a cooling method in which the cold energy of the evaporator is blown into the compartment by a fan, and direct cooling is a cooling method in which the cold energy of the evaporator is transferred to the compartment through natural convection of the air. Air-direct cooling is a cooling method in which the refrigerator compartment adopts direct cooling and the freezer compartment adopts air cooling. Air cooling has higher temperature control accuracy than direct cooling due to the forced convection of the fan.

[0003] During the refrigerator's refrigeration process, regardless of the cooling method (air cooling, direct cooling, or air-direct cooling) or the cooling system (single cooling system or dual cooling system), the refrigerator compartment temperature fluctuates significantly. Direct cooling introduces a temperature gradient due to natural convection, resulting in inaccurate temperature control. While air cooling can deliver cool air through a fan, the fan stops running during periods of inactivity, creating a temperature difference between the upper and lower compartments and uneven compartment temperature distribution. Natural defrosting of the evaporator in direct cooling refrigerators or heating of the evaporator in air cooling refrigerators, both result in a temperature rise during the defrost period due to a lack of cooling energy supplied to the compartment.

[0004] With regard to the problem in the related art that the temperature of the compartment of the refrigerator rises too much during defrosting, no effective solution has been proposed so far. Utility Model Content

[0005] In this embodiment, a dual refrigeration system temperature control device is provided to solve the problem in the related art that the compartment temperature rises too much during the defrosting period of the refrigerator.

[0006] In a first aspect, a dual refrigeration system temperature control device is provided in this embodiment, comprising: a first chamber, a second chamber, a first refrigeration unit, a second refrigeration unit, and an electrical control system; wherein,

[0007] The first refrigeration unit is located in the first room, including a first evaporator, a first defrost heater, a first air outlet, a second air outlet, a first return air outlet, a second return air outlet, a first air outlet electric damper, a second air outlet electric damper, a first return air outlet electric damper, and a second return air outlet electric damper;

[0008] The second refrigeration unit is located in the second room, including a second evaporator, a second defrost heater, a third air outlet, a fourth air outlet, a third return air outlet, a fourth return air outlet, a third air outlet electric damper, a fourth air outlet electric damper, a third return air outlet electric damper, and a fourth return air outlet electric damper;

[0009] The first air outlet electric damper, the first air outlet, the third air outlet and the third air outlet electric damper are connected in sequence, and the first air outlet and the third air outlet are also connected to the air outlet of the first chamber;

[0010] The second air outlet electric damper, the second air outlet, the fourth air outlet and the fourth air outlet electric damper are connected in sequence; the second air outlet and the fourth air outlet are also connected to the air outlet of the second chamber;

[0011] The first return air outlet electric damper, the first return air outlet, the third return air outlet and the third return air outlet electric damper are connected in sequence, and the first return air outlet and the third return air outlet are also connected to the return air outlet of the first chamber;

[0012] The second return air outlet electric damper, the second return air outlet, the fourth return air outlet and the fourth return air outlet electric damper are connected in sequence, and the second return air outlet and the fourth return air outlet are also connected to the return air outlet of the second chamber;

[0013] The electrical control system includes a main control panel and a key display panel. The main control panel is used to control the opening and closing of each electric damper and the operation of the refrigeration fan. The display panel is used to set and display the control parameters inside the refrigerator.

[0014] In some embodiments, the dual refrigeration system temperature control device further includes a first insulation layer and a second insulation layer, wherein:

[0015] The first heat insulation layer is disposed between the first refrigeration unit and the first chamber;

[0016] The second heat insulation layer is arranged between the second refrigeration unit and the second chamber.

[0017] In some embodiments, the first refrigeration unit further includes a first water receiving trough and a first drain pipe; the second refrigeration unit further includes a second water receiving trough and a second drain pipe.

[0018] In some embodiments, the first refrigeration unit further includes a first refrigeration fan, which is disposed above the first evaporator or behind the first evaporator;

[0019] The second refrigeration unit further includes a second refrigeration fan, which is arranged above the second evaporator or on the rear side of the second evaporator.

[0020] In some of the embodiments, the first refrigeration unit further includes a first defrost temperature sensor, and the first defrost temperature sensor is disposed on the first evaporator;

[0021] The second refrigeration unit further includes a second defrost temperature sensor, which is arranged on the second evaporator.

[0022] In some embodiments, the dual refrigeration system temperature control device further includes a plurality of temperature sensors, which are distributed in different areas of the first chamber and the second chamber and are used to detect the temperature difference between different positions of the first chamber and the second chamber.

[0023] In some embodiments, the multiple temperature sensors adopt a distributed NTC temperature sensor and infrared temperature sensor structure.

[0024] In some of the embodiments, the distributed NTC temperature sensors and the infrared temperature sensors are placed in a one-to-one correspondence.

[0025] In some embodiments, the dual refrigeration system temperature control device further includes a refrigeration system control circuit, wherein the refrigeration system control circuit includes: a compressor, an exhaust evaporation tube, a condenser, a drying filter, a first capillary tube, a second capillary tube, a third capillary tube, a first one-way valve, a second one-way valve, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve;

[0026] The compressor is connected to the exhaust evaporation pipe, the condenser, the drying filter, the second one-way valve, the second capillary tube, the third solenoid valve, and the second evaporator in sequence;

[0027] The drying filter is also connected to the first solenoid valve, the first capillary tube, the first evaporator, the first one-way valve, the second solenoid valve, and the compressor in sequence;

[0028] The fourth solenoid valve is connected in series with the third capillary tube, and then connected in parallel with the first solenoid valve and both ends of the first capillary tube.

[0029] In some of the embodiments, the refrigeration system control circuit further includes a condensing fan.

[0030] Compared with the related art, the dual refrigeration system temperature control device provided in this embodiment includes: a first chamber, a second chamber, a first refrigeration unit, a second refrigeration unit and an electrical control system; wherein the first refrigeration unit is located in the first chamber, including a first evaporator, a first defrost heater, a first air outlet, a second air outlet, a first return air outlet, a second return air outlet, a first air outlet electric damper, a second air outlet electric damper, a first return air outlet electric damper, and a second return air outlet electric damper; the second refrigeration unit is located in the second chamber, including a second evaporator, a second defrost heater, a third air outlet, a fourth air outlet, a third return air outlet, a fourth air outlet electric damper, a fourth air outlet electric damper, a third return air outlet electric damper, and a fourth return air outlet electric damper; the first air outlet electric damper, the first air outlet, the third air outlet and the third air outlet electric damper are arranged in sequence The vents in the first and second compartments are electrically connected to one another, and the vents in the second and third compartments are electrically connected to one another.

[0031] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 FIG. 2 is a schematic diagram of the structure of the temperature control device for the dual refrigeration system of this embodiment.

[0034] Figure 2 Schematic diagram of the electrical control system structure of the dual refrigeration system temperature control device of this embodiment.

[0035] Figure 3 2 is a schematic diagram of the control circuit structure of the refrigeration system of this embodiment. DETAILED DESCRIPTION

[0036] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without making any creative work are within the scope of protection of the present application. In addition, it is also understandable that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the contents disclosed in the present application, some changes such as design, manufacturing or production based on the technical contents disclosed in the present application are merely conventional technical means and should not be understood as the contents disclosed in the present application being insufficient.

[0037] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0038] Unless otherwise defined, the technical or scientific terms involved in this application should have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. In this application, the words "one", "a", "the", "these" and the like do not indicate a limit on quantity, and they can be singular or plural. The terms "include", "comprise", "have" and any variations thereof involved in this application are intended to cover non-exclusive inclusion; for example, a system, product or device comprising a series of modules (units) is not limited to the listed modules (units), but may include unlisted modules (units), or may include other modules (units) inherent to these products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Generally, the character " / " indicates that the objects in the preceding and following relationship are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0039] In this embodiment, a dual refrigeration system temperature control device is provided. Figure 1 This is a schematic diagram of the structure of the dual refrigeration system temperature control device of this embodiment. Figure 2 FIG. 1 is a schematic diagram of the electrical control system structure of the dual refrigeration system temperature control device of this embodiment. Figure 1 and Figure 2 As shown, the dual refrigeration system temperature control device includes: a first chamber 11, a second chamber 12, a first refrigeration unit 111 and a second refrigeration unit 121; and an electrical control system 23; wherein,

[0040] The first refrigeration unit 111 is located in the first chamber 11 and includes a first evaporator 112, a first defrost heater 113, a first air outlet 114, a second air outlet 115, a first return air outlet 116, a second return air outlet 117, a first air outlet electric damper 1141, a second air outlet electric damper 1151, a first return air outlet electric damper 1161, and a second return air outlet electric damper 1171;

[0041] The second refrigeration unit 121 is located in the second chamber 12 and includes a second evaporator 122, a second defrost heater 123, a third air outlet 124, a fourth air outlet 125, a third return air outlet 126, a fourth return air outlet 127, a third air outlet electric damper 1241, a fourth air outlet electric damper 1251, a third return air outlet electric damper 1261, and a fourth return air outlet electric damper 1271;

[0042] The first air outlet electric damper 1141, the first air outlet 114, the third air outlet 124 and the third air outlet electric damper 1241 are connected in sequence. The first air outlet 114 and the third air outlet 124 are also connected to the air outlet 118 of the first chamber 11;

[0043] The second air outlet electric damper 1151, the second air outlet 115, the fourth air outlet 125 and the fourth air outlet electric damper 1251 are connected in sequence; the second air outlet 115 and the fourth air outlet 125 are also connected to the air outlet 128 of the second chamber 12;

[0044] The first return air outlet electric damper 1161, the first return air outlet 116, the third return air outlet 126 and the third return air outlet electric damper 1261 are connected in sequence. The first return air outlet 116 and the third return air outlet 126 are also connected to the return air outlet 119 of the first chamber 11;

[0045] The second return air outlet electric damper 1171, the second return air outlet 117, the fourth return air outlet 127 and the fourth return air outlet electric damper 1271 are connected in sequence. The second return air outlet 117 and the fourth return air outlet 127 are also connected to the return air outlet 129 of the second chamber 12;

[0046] The electrical control system 23 includes a main control panel 231 and a key display panel 232; wherein the main control panel 231 is used to control the switch of each electric damper and the operation of the refrigeration fan; the display panel 232 is used to set and display the control parameters inside the refrigerator.

[0047] Specifically, in this embodiment, one of the two compartments is a refrigeration compartment, and the other can be located in the refrigeration compartment, the freezer compartment, or the temperature-controlled room. If both compartments are refrigeration compartments, two refrigeration units are installed in the refrigeration compartment. However, for energy conservation, the optimal installation is to install the refrigeration units in a compartment other than the refrigeration compartment. This allows the refrigeration functions of the two compartments to be shared through the installed piping, reduces the layout of the air ducts, and thus reduces the air duct space occupied by the refrigerator. The four electric dampers in the first compartment 11 and the second compartment 12 can be opened and closed according to actual needs, thereby controlling the opening and closing of the corresponding air outlet and return vents. Among them, the first air outlet electric damper 1141 controls the opening and closing of the first air outlet 114, and the air duct where the first air outlet 114 is located is connected to the air outlet 118 of the first chamber 11; the second air outlet electric damper 1151 controls the opening and closing of the second air outlet 115, and the air duct where the second air outlet 115 is located is connected to the air outlet 128 of the second chamber 12; the third air outlet electric damper 1241 controls the opening and closing of the third air outlet 124, and the air duct where the third air outlet 124 is located is connected to the air outlet 118 of the first chamber 11; the fourth air outlet electric damper 1251 controls the opening and closing of the fourth air outlet 125, and the air duct where the fourth air outlet 125 is located is connected to the air outlet 128 of the second chamber 12.

[0048] The first return air outlet electric damper 1161 controls the opening and closing of the first return air outlet 116. The air duct where the first return air outlet 116 is located is connected to the return air outlet 119 of the first chamber 11. The second return air outlet electric damper 1171 controls the opening and closing of the second return air outlet 117. The air duct where the second return air outlet 117 is located is connected to the return air outlet 129 of the second chamber 12. The third return air outlet electric damper 1261 controls the opening and closing of the third return air outlet 126. The air duct where the third return air outlet 126 is located is connected to the return air outlet 119 of the first chamber 11. The fourth return air outlet electric damper 1271 controls the opening and closing of the fourth return air outlet 127. The air duct where the fourth return air outlet 127 is located is connected to the return air outlet 129 of the second chamber 12.

[0049] When the refrigeration unit is defrosting, the two electric dampers of the air outlet and the two electric dampers of the air return outlet of the refrigeration unit are closed to prevent the heat caused by defrosting in the refrigeration unit from diffusing into the compartment, thereby increasing the temperature of the compartment.

[0050] Specifically, when the first refrigeration unit 111 enters the defrost phase, the first and second air outlet electric dampers 1141, 1151, and the first and second return air outlet electric dampers 1161, 1171 are closed. This prevents heat from the first refrigeration unit 111 from dissipating into the first and second compartments 11, 12, thereby preventing the compartment temperatures from rising. The second refrigeration unit 121 enters the defrost phase in the same manner as described above, and will not be further described here.

[0051] When the refrigeration unit of the compartment is not in the defrosting stage and the compartment needs to be cooled, the refrigeration unit of the compartment is started for cooling, and the damper of the refrigeration unit to the compartment is opened so that the cold air generated by the refrigeration unit can cool the compartment.

[0052] Specifically, when the first refrigeration unit 111 is not in the defrosting stage and the first chamber 11 needs to be cooled, the first refrigeration unit 111 is started for cooling, and the first air outlet electric damper 1141 and the first return air outlet electric damper 1161 are controlled to open, so that the cold air generated by the first refrigeration unit 111 passes through the first air outlet 114, along the air duct, and enters the first chamber 11 through the air outlet 118 of the first chamber 11, thereby cooling the first chamber 11. The high-temperature gas in the first chamber 11 passes through the return air outlet 119 of the first chamber 11, along the air duct, enters the first return air outlet 116, and then enters the first refrigeration unit 111 for gas exchange.

[0053] When the refrigeration unit of a compartment is in the defrosting stage and the compartment needs to be cooled, the refrigeration unit of another compartment is started for cooling, and the damper of the other refrigeration unit leading to the compartment is opened so that the cold air generated by the other refrigeration unit can cool the compartment.

[0054] Specifically, when the first refrigeration unit 111 is defrosting and detects that the temperature of the first compartment 11 has risen and needs to be cooled, it controls all the electric dampers in the first refrigeration unit 111 to close, opens the second refrigeration unit 121 for cooling, and then opens the third air outlet electric damper 1241 and the third return air outlet electric damper 1261. This allows the cold air generated by the second refrigeration unit 121 to pass through the third air outlet 124, along the air duct, and then through the air outlet 118 of the first compartment 11 into the first compartment 11, thereby cooling the first compartment 11. The high-temperature air in the first compartment 11 then returns to the second refrigeration unit 121 through the return air outlet 119 and the third return air outlet 126 of the first compartment 11 for gas exchange. Similarly, when the second refrigeration unit 121 is defrosting and detects that the second compartment 12 needs to be cooled, the same method as above is used and will not be further described here.

[0055] When one of the refrigeration units is in the defrosting stage and it is detected that both compartments need to be cooled, the non-defrosting refrigeration unit is turned on for cooling, the dampers of the refrigeration unit leading to the two compartments are opened, and the two compartments are cooled through the refrigeration unit.

[0056] Specifically, when the first refrigeration unit 111 is defrosting and detects that the temperature of the first chamber 11 and the second chamber 12 has risen and needs to be cooled, all the electric dampers in the first refrigeration unit 111 are controlled to close, the second refrigeration unit 121 is opened for cooling, and then the third air outlet electric damper 1241, the fourth air outlet electric damper 1251, the third return air outlet electric damper 1261, and the fourth return air outlet electric damper 1271 are opened, so that the cold air generated by the second refrigeration unit 121 passes through the third air outlet 124, along the air duct, and then through the air outlet 118 of the first chamber 11 into the first chamber 11, thereby cooling the first chamber 11. The high-temperature gas in the first chamber 11 returns to the second refrigeration unit 121 through the return air port 119 and the third return air port 126 of the first chamber 11 for gas exchange. The cold air generated by the second refrigeration unit 121 passes through the fourth air outlet 125, along the air duct, and then through the air outlet 128 of the second compartment 12, entering the second compartment 12, thereby cooling the second compartment 12. The high-temperature air in the second compartment 12 then returns to the second refrigeration unit 121 through the return air outlet 129 and the fourth return air outlet 127 of the second compartment 12 for gas exchange. Similarly, when the second refrigeration unit 121 is defrosting and detects that the first and second compartments 11 and 12 need to be cooled, the same method as above is used, and no further description is given here.

[0057] In addition, the defrost time of the two refrigeration units is staggered. When one of the refrigeration units is in the defrost stage and the other refrigeration unit also reaches the defrost conditions, the refrigeration unit will enter the defrost stage after the defrost of the first refrigeration unit is completed, so as to prevent the two from defrosting at the same time and the compartment temperature from rising and becoming uncontrollable.

[0058] The dual refrigeration system temperature control device also includes an electrical control system 23, which consists of a main control panel 231 and a key display panel 232. The main control panel 231 is used to control the opening and closing of each electric damper and the operation of the refrigeration fan to control the flow of cold air generated by the refrigeration unit to achieve the required compartment cooling under different conditions. The display panel 232 is used to set and display the control parameters inside the refrigerator and view the temperature and cooling status of the compartment in real time.

[0059] The above-mentioned dual refrigeration system temperature control device is provided with two refrigeration units and a refrigeration system duct structure that can provide cooling to different compartments and the duct loop can be opened and closed. It can switch between refrigeration, defrosting and ducting according to the actual cooling needs of the compartments, thereby realizing the control of the compartment temperature, meeting the cooling needs of different compartments under different circumstances, and solving the problem of excessive temperature rise in the compartment during defrosting.

[0060] In some embodiments, the dual refrigeration system temperature control device further includes a first heat insulation layer 14 and a second heat insulation layer 15, wherein:

[0061] The first heat insulating layer 14 is disposed between the first refrigeration unit and the first compartment; the second heat insulating layer 15 is disposed between the second refrigeration unit and the second compartment.

[0062] Specifically, an insulation layer is provided between the refrigeration unit and the refrigeration compartment. This insulation layer prevents heat generated by the refrigeration unit from being transferred to the compartment during defrosting, further reducing the temperature rise in the compartment. A first insulation layer 14 is provided between the first refrigeration unit and the first compartment to prevent heat generated by the first refrigeration unit during defrosting from being transferred to the first compartment. A second insulation layer 15 is provided between the second refrigeration unit and the second compartment to prevent heat generated by the second refrigeration unit during defrosting from being transferred to the second compartment.

[0063] In another embodiment, the first refrigeration unit further includes a first water receiving trough 16 and a first drain pipe 17 ; the second refrigeration unit further includes a second water receiving trough 18 and a second drain pipe 19 .

[0064] Specifically, based on the above embodiment, the first refrigeration unit is further provided with a first water receiving trough 16 and a first drain pipe 17. After the evaporator of the first refrigeration unit is heated and defrosted by the defrost heater, the defrosted water is discharged outside the compartment through the first water receiving trough 16 and the first drain pipe 17. The second refrigeration unit is further provided with a second water receiving trough 18 and a second drain pipe 19. After the evaporator of the second refrigeration unit is heated and defrosted by the defrost heater, the defrosted water is discharged outside the compartment through the second water receiving trough 18 and the second drain pipe 19.

[0065] In some embodiments, the first refrigeration unit further includes a first refrigeration fan 101, which is arranged above the first evaporator or at the back of the first evaporator; the second refrigeration unit further includes a second refrigeration fan 102, which is arranged above the second evaporator or at the back of the second evaporator.

[0066] Specifically, based on the above embodiment, the first refrigeration unit is further provided with a first refrigeration fan 101, which is arranged above the first evaporator or at the back of the first evaporator. When the first refrigeration unit is defrosting, the electric dampers of all the air outlets and return air outlets of the first refrigeration unit are closed. At this time, the first refrigeration fan 101 is controlled to run intermittently for a short time (e.g., the refrigeration fan is controlled to run for 10 seconds every 1 minute) to make the temperature on the evaporator more uniform and to make the defrost water attached to the evaporator separate from the evaporator faster, thereby shortening the defrost time and avoiding the increase in the compartment temperature due to excessive defrost time. The setting and control principle of the second refrigeration fan 102 of the second refrigeration unit are the same as those of the first refrigeration fan 101 and will not be repeated here.

[0067] In another embodiment, the first refrigeration unit further includes a first defrost temperature sensor 103, which is disposed on the first evaporator; the second refrigeration unit further includes a second defrost temperature sensor 104, which is disposed on the second evaporator.

[0068] Specifically, the first refrigeration unit further includes a first defrost temperature sensor 103, which is disposed on the first evaporator and is used to detect whether the first refrigeration unit has reached a defrost condition, thereby controlling whether the first refrigeration unit should start defrosting. The second refrigeration unit further includes a second defrost temperature sensor 104, which is disposed on the second evaporator and is used to detect whether the second refrigeration unit has reached a defrost condition, thereby controlling whether the second refrigeration unit should start defrosting.

[0069] In some embodiments, the dual refrigeration system temperature control device further includes a plurality of temperature sensors, which are distributed in different areas of the first chamber and the second chamber to detect the temperature difference between different locations of the first chamber and the second chamber. The plurality of temperature sensors may be a distributed NTC temperature sensor and an infrared temperature sensor structure, with the distributed NTC temperature sensors and the infrared temperature sensors being placed in a one-to-one correspondence.

[0070] Specifically, a plurality of temperature sensors are set in the compartment of the dual refrigeration system temperature control device. The plurality of temperature sensors adopt a distributed NTC temperature sensor and an infrared temperature sensor structure, and the distributed NTC temperature sensor and the infrared temperature sensor are placed in a one-to-one correspondence to detect the temperature at different positions. When the temperature at different positions in the compartment is greatly different, even if the compartment temperature has not reached the start-up point, the refrigeration fan will be started to operate, and the air circulation in the air duct makes the compartment temperature more uniform, reducing the temperature difference between the upper and lower positions of the compartment caused by the temperature rise and the sinking of the cold air during the period when the compartment stops cooling. The air outlet of the compartment air duct is set at the upper position of the compartment, or at the upper position and left and right sides of the compartment at the same time, and the return air outlet of the compartment air duct is set at the lower position of the compartment, which is conducive to the circulation of the air in the duct, and the cold air is blown from the upper position or the left and right sides of the compartment to the lower position of the compartment. During the cooling period of the compartment, cold air is blown into the compartment through the air duct. Due to the circulation of wind in the compartment, the temperature difference between the upper and lower parts of the compartment is small and the temperature is uniform. During the non-cooling period of the compartment, when the temperature difference between the maximum and minimum values ​​of the temperature sensors at various positions in the compartment is greater than the air duct circulation start threshold, and the temperature of the temperature sensors at various positions is greater than the shutdown point, regardless of whether the evaporator of the refrigeration unit is in the cooling state, the air outlet and return air outlet electric dampers to the compartment are opened, and at the same time, the refrigeration fan is controlled to operate. When the temperature difference between the maximum and minimum values ​​of the temperature sensors at various positions is less than the air duct circulation stop threshold, or, when at least one of the temperature sensor temperatures at various positions is less than or equal to the shutdown point, the air outlet and return air outlet electric dampers to the compartment are closed. At this time, whether the refrigeration fan stops running depends on whether other compartments need the refrigeration unit to provide cooling capacity. If other compartments do not need to provide cooling capacity through the refrigeration unit, the refrigeration fan is stopped. If other compartments need to provide cooling capacity through the refrigeration unit, the refrigeration fan is maintained.

[0071] Specifically, such as Figure 1As shown, taking the first chamber as an example, an upper NTC temperature sensor 131 and an upper infrared temperature sensor 132 are placed at the upper portion of the first chamber, and a lower NTC temperature sensor 133 and a lower infrared temperature sensor 134 are placed at the lower portion of the first chamber. Because the actual measured values ​​of the infrared temperature sensors cannot accurately correspond to the temperature of the food or food storage space, correction is required. In this embodiment, an infrared temperature correction method is used to obtain the infrared corrected temperatures of the upper infrared temperature sensor and the lower infrared temperature sensor. During the period when the first compartment stops cooling, when the temperature difference between the maximum and minimum values ​​of the four temperature sensor temperatures (upper NTC temperature, upper infrared corrected temperature, lower NTC temperature, and lower infrared corrected temperature) of the first compartment is greater than the air duct circulation start threshold, which is manually set in advance and can be set according to actual needs, and when these four temperature values ​​are all greater than or equal to the cooling stop point of the first compartment, the first air outlet electric damper 1141 and the first return air outlet electric damper 1161 of the first refrigeration unit 111 are opened, and the first refrigeration fan 101 of the first refrigeration unit 111 is controlled to operate, so as to make the upper and lower temperatures in the first compartment uniform, thereby solving the upper and lower temperature difference of the compartment space caused by the sinking of cold air during the period when the refrigerator compartment stops cooling. When the temperature difference between the maximum and minimum values ​​of the four temperature sensors of the first compartment (upper NTC temperature, upper infrared correction temperature, lower NTC temperature, lower infrared correction temperature) is less than the air duct circulation stop threshold, or at least one of the temperature values ​​of the four temperature sensors is less than or equal to the refrigeration stop point of the first compartment, the first air outlet electric damper 1141 and the first return air outlet electric damper 1161 of the first refrigeration unit 111 are closed. At this time, whether the first refrigeration fan 101 stops running is determined by whether the second compartment 12 needs the first refrigeration unit 111 to provide cooling capacity. If the second compartment 12 is not in the defrosting period, the first refrigeration fan 101 of the first compartment 11 is controlled to stop running; if the second compartment 12 is in the defrosting period, the cooling and cooling of the second compartment 12 is determined based on whether the first refrigeration unit 111 is required to provide cooling. If the second compartment 12 needs cooling, the first refrigeration fan 101 is controlled to run, and the second air outlet electric damper 1151 and the second air return outlet electric damper 1171 leading to the second compartment 12 are opened to provide cooling and cooling the second compartment 12; if the second compartment 12 does not need cooling, the first refrigeration fan 101 is controlled to stop running. This reduces the temperature difference between different positions of the compartment due to temperature rise and cold air sinking during the compartment cooling period.

[0072] When the first refrigeration unit is in the defrosting state, the upper and lower temperatures of the first and second chambers can be adjusted by the second refrigeration unit in the same manner as above.

[0073] In addition, the infrared temperature sensor can detect the temperature changes of objects within the field of view angle, has the characteristics of fast temperature sensing speed and can detect the temperature of objects in the air. However, due to the different emissivity of the objects, the temperature detected by the infrared temperature sensor is different from the actual temperature. In addition, the NTC temperature sensor has the problem of temperature sensing hysteresis, which leads to inaccurate temperatures detected at different positions in the compartment. In this embodiment, the infrared temperature sensor and the NTC temperature sensor are placed in a one-to-one correspondence, so that the infrared temperature and the NTC temperature are kept consistent in a temperature stable state. During normal air circulation and temperature fluctuations inside the compartment, and without external air crosstalk, there is a corresponding relationship between the infrared temperature and the NTC temperature at the same position. The slower the temperature change inside the compartment, the more accurate the corresponding relationship between the infrared temperature and the NTC temperature. This state is defined as a temperature stable state. Under the temperature stable state, the temperature change of the highest and lowest points of the temperature curve is the most gentle. At this time, the correspondence between the NTC temperature and the infrared temperature is closer. The lowest NTC temperature at the time of shutdown, the highest NTC temperature at the time of startup, and the infrared temperature corresponding to the lowest NTC temperature and the highest NTC temperature are collected. The temperature correction coefficient is calculated by the temperature value of the NTC temperature sensor and the temperature value change difference of the infrared temperature sensor. The temperature correction coefficient is used to correct the temperature value of the infrared temperature sensor in the dynamic change process to obtain the infrared corrected temperature in the dynamic change process, thereby realizing the purpose of using the infrared temperature sensor to quickly and accurately detect the temperature change of the compartment space, solving the problem of temperature sensing lag of the NTC temperature sensor, and realizing fast and accurate temperature measurement.

[0074] This embodiment collects the temperature values ​​of the NTC temperature sensor and the infrared temperature sensor during the refrigeration start-stop cycle with relatively stable temperature, and calculates the temperature correction coefficient by the difference between the temperature values ​​of the NTC temperature sensor and the temperature value of the infrared temperature sensor. The temperature correction coefficient is used to correct the temperature value of the infrared temperature sensor during the dynamic change process, thereby accurately obtaining the temperature value of the infrared temperature sensor during the dynamic change process, realizing the purpose of quickly and accurately detecting the temperature change of the compartment by using the infrared temperature sensor and eliminating the temperature sensing hysteresis of the NTC temperature sensor.

[0075] In another embodiment, the dual refrigeration system temperature control device further includes a refrigeration system control circuit. Figure 3 This is a schematic diagram of the refrigeration system control circuit structure of this embodiment. Figure 1 On the basis of Figure 3As shown, the refrigeration system control circuit includes: a compressor 30, an exhaust evaporation pipe 31, a condenser 32, a drying filter 33, a first capillary tube 34, a second capillary tube 35, a third capillary tube 36, a first one-way valve 37, a second one-way valve 38, a first solenoid valve 391, a second solenoid valve 392, a third solenoid valve 393, a fourth solenoid valve 394 and a condensing fan 395;

[0076] The compressor 30 is connected to the exhaust evaporation pipe 31, the condenser 32, the drying filter 33, the second one-way valve 38, the second capillary tube 35, the third solenoid valve 393, and the second evaporator 122 in sequence;

[0077] The drying filter 33 is also connected to the first solenoid valve 391, the first capillary tube 34, the first evaporator 112, the first one-way valve 37, the second solenoid valve 392, and the compressor 30 in sequence;

[0078] The fourth solenoid valve 394 is connected in series with the third capillary tube 36 , and then connected in parallel with the first solenoid valve 391 and both ends of the first capillary tube 34 .

[0079] Specifically, the refrigeration system control circuit consists of a compressor 30, an exhaust evaporator 31, a condenser 32, a drying filter 33, a first capillary tube 34, a second capillary tube 35, a third capillary tube 36, a first one-way valve 37, a second one-way valve 38, a first solenoid valve 391, a second solenoid valve 392, a third solenoid valve 393, a fourth solenoid valve 394 and a condensing fan 395.

[0080] When the first refrigeration unit 111 and the second refrigeration unit 121 both need to be refrigerated, the first solenoid valve 391 and the third solenoid valve 393 are opened, the second solenoid valve 392 and the fourth solenoid valve 394 are closed, the compressor 30 is running, the first evaporator 112 and the second evaporator 122 are running, and the first refrigeration unit 111 and the second refrigeration unit 121 start to refrigerate; when the first refrigeration unit 111 needs to be refrigerated and the second refrigeration unit 121 does not need to be refrigerated, the fourth solenoid valve 394 and the second solenoid valve 392 are opened, and the first solenoid valve 391 and the third solenoid valve 393 are closed. 393, the compressor 30 is running, the first evaporator 112 is running, and the first refrigeration unit 111 starts to refrigerate; when the second refrigeration unit 121 needs to be refrigerated and the first refrigeration unit 111 does not need to be refrigerated, the third solenoid valve 393 is opened, and the first solenoid valve 391, the second solenoid valve 392 and the fourth solenoid valve 394 are closed, the compressor 30 is running, the second evaporator 122 is running, and the second refrigeration unit 121 starts to refrigerate; when both the first refrigeration unit 111 and the second refrigeration unit 121 do not need to be refrigerated, all solenoid valves are closed and the compressor 30 stops running.

[0081] It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0082] Obviously, the accompanying drawings are merely examples or embodiments of the present application. A person skilled in the art can also apply the present application to other similar situations based on these drawings without inventive effort. Furthermore, it is understandable that, although the work involved in this development process may be complex and lengthy, certain design, manufacturing, or production changes based on the technical content disclosed in this application are merely routine technical means for a person skilled in the art and should not be considered to constitute a deficiency in the disclosure of the present application.

[0083] The term "embodiment" as used in this application refers to specific features, structures, or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily mean that the embodiment is the same, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is understood, either explicitly or implicitly, by those skilled in the art that the embodiments described in this application can be combined with other embodiments when there is no conflict.

[0084] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A dual refrigeration system temperature control device, characterized in that: include: A first room, a second room, a first refrigeration unit, a second refrigeration unit and an electrical control system; wherein, The first refrigeration unit is located in the first room and includes a first evaporator, a first defrost heater, a first air outlet, a second air outlet, a first return air outlet, a second return air outlet, a first air outlet electric damper, a second air outlet electric damper, a first return air outlet electric damper, and a second return air outlet electric damper; The second refrigeration unit is located in the second room and includes a second evaporator, a second defrost heater, a third air outlet, a fourth air outlet, a third return air outlet, a fourth return air outlet, a third air outlet electric damper, a fourth air outlet electric damper, a third return air outlet electric damper, and a fourth return air outlet electric damper; The first air outlet electric damper, the first air outlet, the third air outlet and the third air outlet electric damper are connected in sequence, and the first air outlet and the third air outlet are also connected to the air outlet of the first chamber; The second air outlet electric damper, the second air outlet, the fourth air outlet and the fourth air outlet electric damper are connected in sequence; the second air outlet and the fourth air outlet are also connected to the air outlet of the second chamber; The first return air outlet electric damper, the first return air outlet, the third return air outlet and the third return air outlet electric damper are connected in sequence, and the first return air outlet and the third return air outlet are also connected to the return air outlet of the first chamber; The second return air outlet electric damper, the second return air outlet, the fourth return air outlet and the fourth return air outlet electric damper are connected in sequence, and the second return air outlet and the fourth return air outlet are also connected to the return air outlet of the second chamber; The electrical control system includes a main control panel and a key display panel; wherein the main control panel is used to control the switch of each electric damper and the operation of the refrigeration fan; the display panel is used to set and display the control parameters inside the refrigerator.

2. The dual refrigeration system temperature control device according to claim 1, characterized in that: The dual refrigeration system temperature control device further includes a first heat insulation layer and a second heat insulation layer, wherein: The first heat insulation layer is disposed between the first refrigeration unit and the first chamber; The second heat insulation layer is disposed between the second refrigeration unit and the second chamber.

3. The dual refrigeration system temperature control device according to claim 1 or 2, characterized in that: The first refrigeration unit further includes a first water receiving tank and a first drain pipe; The second refrigeration unit further includes a second water receiving tank and a second drain pipe.

4. The dual refrigeration system temperature control device according to claim 1 or 2, characterized in that: The first refrigeration unit further includes a first refrigeration fan, which is arranged above the first evaporator or on the rear side of the first evaporator; The second refrigeration unit further includes a second refrigeration fan, which is arranged above the second evaporator or at the rear of the second evaporator.

5. The dual refrigeration system temperature control device according to claim 1 or 2, characterized in that: The first refrigeration unit further includes a first defrost temperature sensor, which is arranged on the first evaporator; The second refrigeration unit further includes a second defrost temperature sensor, which is disposed on the second evaporator.

6. The dual refrigeration system temperature control device according to claim 1 or 2, characterized in that: The dual refrigeration system temperature control device further includes a plurality of temperature sensors, which are distributed in different areas of the first chamber and the second chamber and are used to detect the temperature difference between different positions of the first chamber and the second chamber.

7. The dual refrigeration system temperature control device according to claim 6, characterized in that: The multiple temperature sensors adopt a distributed NTC temperature sensor and infrared temperature sensor structure.

8. The dual refrigeration system temperature control device according to claim 7, characterized in that: The distributed NTC temperature sensors and the infrared temperature sensors are placed in a one-to-one correspondence.

9. The dual refrigeration system temperature control device according to claim 1 or claim 2, characterized in that: The dual refrigeration system temperature control device further includes a refrigeration system control circuit, wherein the refrigeration system control circuit includes: a compressor, an exhaust evaporation pipe, a condenser, a drying filter, a first capillary tube, a second capillary tube, a third capillary tube, a first one-way valve, a second one-way valve, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve; The compressor is connected to the exhaust evaporation pipe, the condenser, the drying filter, the second one-way valve, the second capillary tube, the third solenoid valve, and the second evaporator in sequence; The drying filter is also connected to the first solenoid valve, the first capillary tube, the first evaporator, the first one-way valve, the second solenoid valve, and the compressor in sequence; After being connected in series with the third capillary tube, the fourth solenoid valve is connected in parallel with the first solenoid valve and both ends of the first capillary tube.

10. The dual refrigeration system temperature control device according to claim 9, characterized in that: The refrigeration system control circuit also includes a condensing fan.

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