Refrigeration system and refrigeration control method
By using a phased, stepped refrigeration system, and combining a four-way solenoid valve with a one-way valve on the compressor, precise temperature control of the refrigerator and freezer compartments is achieved, solving the problem of wasted cooling capacity in traditional refrigeration systems and improving refrigeration efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AUCMA
- Filing Date
- 2023-06-20
- Publication Date
- 2026-06-09
AI Technical Summary
In traditional refrigeration systems, the compressor has low suction efficiency, making it difficult to achieve efficient refrigeration at ultra-low temperatures, and resulting in significant waste of cooling capacity.
The refrigeration system adopts a phased, stepped control method. By combining a four-way solenoid valve and a one-way valve of the compressor with temperature sensors in the refrigerator and freezer compartments, dynamic control of refrigerant flow is achieved, avoiding waste of cooling capacity.
It enables precise temperature control of the refrigerator and freezer compartments, improving the efficiency and effectiveness of the refrigeration system and avoiding waste of cooling capacity.
Smart Images
Figure CN116608607B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of refrigeration technology, specifically to a refrigeration system and a refrigeration control method. Background Technology
[0002] In a refrigeration system, the compressor converts the refrigerant into a high-temperature, high-pressure gas. The gas is then cooled by the condenser, and after being throttled and depressurized by the capillary tube, it enters the evaporator. After being cooled by evaporation in the evaporator, the gas flows back to the compressor's suction port, thus realizing the refrigerant refrigeration cycle.
[0003] Limited by the suction efficiency of traditional compressors and ordinary dual-suction compressors, conventional refrigeration systems struggle to achieve ultra-low temperatures by increasing the compressor's energy efficiency ratio. Therefore, there is an urgent need to propose a refrigeration system and refrigeration control method to achieve high-efficiency heat exchange and meet user needs. Summary of the Invention
[0004] To address the shortcomings of the prior art, this invention provides a refrigeration system and a refrigeration control method. By implementing phased and stepped control of the refrigeration system, the waste of cooling capacity is avoided, and the performance of the refrigeration system is improved.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A refrigeration system includes a compressor, a condenser, a four-way solenoid valve, a refrigerated evaporator, a frozen evaporator, and a temperature control module;
[0007] The temperature control module includes a refrigerator compartment temperature sensor, a freezer compartment temperature sensor, and a controller. The refrigerator compartment temperature sensor is located inside the refrigerator compartment and is used to measure the temperature inside the refrigerator compartment. The freezer compartment temperature sensor is located inside the freezer compartment and is used to measure the temperature inside the freezer compartment. The refrigerator compartment temperature sensor and the freezer compartment temperature sensor are respectively connected to the controller.
[0008] The compressor is equipped with a main suction port, a secondary suction port and a discharge port. The discharge port is connected to the refrigerant inlet of the condenser through a discharge pipe, and the refrigerant outlet of the condenser is connected to the inlet of the four-way solenoid valve through a pipe.
[0009] The first outlet of the four-way solenoid valve is connected to the refrigerant inlet of the refrigeration evaporator through a first pipeline, and the refrigerant outlet of the refrigeration evaporator is connected to the main suction port of the compressor through a main suction pipeline.
[0010] The second outlet of the four-way solenoid valve is connected to the refrigerant inlet of the refrigeration evaporator through a second pipeline. The section of the second pipeline at the refrigeration evaporator is set as a coil. A cold guide plate is set between the coil and the refrigeration evaporator. The refrigeration evaporator and the coil are located on both sides of the cold guide plate to improve the heat exchange efficiency of the refrigeration compartment.
[0011] The third outlet of the four-way solenoid valve is connected to the refrigerant inlet of the evaporator via a third pipeline, and the refrigerant outlet of the evaporator is connected to the auxiliary suction port of the compressor via an auxiliary suction pipeline.
[0012] Both the compressor and the four-way solenoid valve are connected to the controller.
[0013] Preferably, a first capillary tube is provided on the first pipeline near the refrigerant inflow end of the refrigeration evaporator, and a second capillary tube is provided on the third pipeline near the refrigerant inflow end of the refrigeration evaporator.
[0014] Preferably, a first one-way valve is provided at the main intake port, a second one-way valve is provided at the auxiliary intake port, and a third one-way valve is provided at the exhaust port. The first one-way valve, the second one-way valve, and the third one-way valve are respectively connected to the controller.
[0015] Preferably, the coil is formed by bending a single evaporator tube to create a main structure with parallel straight tubes in the middle and U-shaped ends at both ends. The spacing between adjacent parallel straight tubes in the upper part of the refrigeration evaporator is smaller than the spacing between adjacent parallel straight tubes in the lower part of the refrigeration evaporator.
[0016] A refrigeration control method, employing the refrigeration system described above, specifically includes the following steps:
[0017] Step 1: Set the refrigeration temperature T0, the first target freezing temperature T3, and the second target freezing temperature T4 in the temperature controller. The second target freezing temperature T4 is less than the first target freezing temperature T3. At this time, the first outlet, the second outlet, and the third outlet of the four-way solenoid valve are all in the open state, and the first check valve, the second check valve, and the third check valve of the compressor are all in the open state.
[0018] Step 2: Use the refrigerator compartment temperature sensor to measure the temperature of the refrigerator compartment and transmit it to the temperature controller. The temperature controller makes a judgment based on the preset refrigerator temperature T0.
[0019] If the measured refrigeration temperature T1 is not less than the preset refrigeration temperature T0, the temperature controller controls the compressor to start. At the same time, the temperature controller controls the first and second check valves of the compressor to open, the first and third outlet ends of the four-way solenoid valve to open, and the second outlet end to close. The temperature of the refrigeration compartment is measured in real time by the refrigeration compartment temperature sensor and transmitted to the temperature controller. When the refrigeration temperature T1 measured by the refrigeration compartment temperature sensor does not exceed the preset refrigeration temperature T0, proceed to step 3.
[0020] If the measured refrigeration temperature T1 is less than the preset refrigeration temperature T0, proceed directly to step 3;
[0021] Step 3: The temperature of the freezer compartment is measured by the freezer compartment temperature sensor and transmitted to the temperature controller. The temperature controller makes a judgment based on the preset first target freezing temperature T3.
[0022] If the measured freezing temperature T2 is not less than the preset first target freezing temperature T3, the temperature controller controls the first and second outlet ends of the four-way solenoid valve to close and the third outlet end to open, and at the same time controls the first and third check valves of the compressor to close and the second check valve to open, so that the freezing temperature T2 of the freezer compartment is less than the preset first target freezing temperature T3.
[0023] If the measured freezing temperature T2 is less than the preset first target freezing temperature T3, the temperature controller will make a judgment based on the preset second target freezing temperature T4.
[0024] When the freezing temperature T2 is less than the preset second target freezing temperature T4, the compressor stops and proceeds to step 4.
[0025] When the freezing temperature T2 is between the preset first target freezing temperature T3 and the preset second target freezing temperature T4, the temperature controller controls the first, second, and third outlet ends of the four-way solenoid valve to open. At the same time, the temperature controller controls the first and second check valves of the compressor to open. The freezing compartment temperature sensor measures the temperature of the freezing compartment in real time and transmits it to the temperature controller. When the freezing temperature T2 measured by the freezing compartment temperature sensor is less than the preset second target freezing temperature T4, the compressor is turned off and the process proceeds to step 4.
[0026] Step 4: Use the refrigerator compartment temperature sensor to measure the temperature of the refrigerator compartment in real time, and transmit the measured refrigerator temperature T1 to the temperature controller in real time.
[0027] The beneficial technical effects brought about by this invention are as follows:
[0028] This invention utilizes a controller to control a four-way solenoid valve and a one-way valve of the compressor, achieving efficient heat exchange and refrigeration through dual intake and four-way circulation. By adjusting the refrigeration effect of the refrigeration system in stages and steps, it achieves precise control of the temperature of the refrigerator and freezer compartments, dynamically regulates the flow of refrigerant in the refrigeration system, avoids waste of cooling capacity, and improves the refrigeration effect of the refrigeration system. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the refrigeration system of the present invention.
[0030] Figure 2 This is a schematic diagram of the compressor of the present invention.
[0031] Figure 3 This is a schematic diagram of the coil structure.
[0032] Figure 4 This is a schematic diagram of the cold conduction plate.
[0033] Figure 5 This is a flowchart of the refrigeration control method of the present invention.
[0034] In the diagram, 1. Compressor, 2. Condenser, 3. Four-way solenoid valve, 4. Refrigeration evaporator, 5. Freezing evaporator, 6. Main suction port, 7. Auxiliary suction port, 8. Exhaust port, 9. First pipeline, 10. Second pipeline, 11. Third pipeline, 12. First capillary tube, 13. Second capillary tube, 14. First check valve, 15. Second check valve, 16. Third check valve, 17. Coil, 18. Cooling plate. Detailed Implementation
[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0037] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements of this invention, and do not specifically refer to any component or element in this invention, and should not be construed as limiting this invention.
[0038] In this invention, terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.
[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0040] This invention proposes a refrigeration system, such as Figure 1 As shown, it includes a compressor 1, a condenser 2, a four-way solenoid valve 3, a refrigerated evaporator 4, a frozen evaporator 5, and a temperature control module.
[0041] The temperature control module includes a refrigerator compartment temperature sensor, a freezer compartment temperature sensor, and a controller. The refrigerator compartment temperature sensor is located inside the refrigerator compartment and is used to measure the temperature inside the refrigerator compartment. The freezer compartment temperature sensor is located inside the freezer compartment and is used to measure the temperature inside the freezer compartment. The refrigerator compartment temperature sensor and the freezer compartment temperature sensor are respectively connected to the controller, which is used to monitor and regulate the temperature of the refrigerator compartment and the freezer compartment in real time.
[0042] The compressor is equipped with a main suction port 6, a secondary suction port 7, and a discharge port 8, such as Figure 2 As shown, a first one-way valve 14 is installed at the main suction port, a second one-way valve 15 is installed at the auxiliary suction port, and a third one-way valve 16 is installed at the discharge port. The first, second, and third one-way valves are connected to a controller, which controls the opening and closing of the first, second, and third one-way valves, thereby controlling the flow of refrigerant. In this embodiment, the compressor uses two suction ports connected in parallel. Compared to a traditional single-suction-port compressor, the parallel arrangement of the two suction ports further realizes the diversion control of refrigerant, which is beneficial for the graded temperature control of the refrigeration system.
[0043] The compressor's exhaust port is connected to the refrigerant inlet of the condenser via an exhaust pipe, and the refrigerant outlet of the condenser is connected to the inlet of the four-way solenoid valve via a pipe.
[0044] The first outlet of the four-way solenoid valve is connected to the refrigerant inlet of the refrigeration evaporator through the first pipe 9. A first capillary tube 12 is provided on the first pipe 9 near the refrigerant inlet of the refrigeration evaporator. The refrigerant outlet of the refrigeration evaporator is connected to the main suction port of the compressor through the main suction pipe.
[0045] The second outlet of the four-way solenoid valve is connected to the refrigerant inlet of the refrigeration evaporator via the second pipe 10. The section of the second pipe 10 located at the refrigeration evaporator is configured as a coil 17. The coil 17 is a main structure formed by bending a single evaporation tube to form parallel straight pipes in the middle and U-shaped ends. The spacing between adjacent parallel straight pipes in the upper part of the refrigeration evaporator is smaller than the spacing between adjacent parallel straight pipes in the lower part of the refrigeration evaporator. Figure 3 As shown, a cold-conducting plate 18 is provided between the coil and the refrigeration evaporator. The refrigeration evaporator 4 and the coil 17 are located on both sides of the cold-conducting plate, as shown. Figure 4 As shown, this is used to improve the heat exchange efficiency of the cold storage compartment.
[0046] The third outlet of the four-way solenoid valve is connected to the refrigerant inlet of the evaporator via the third pipe 11. A second capillary tube 13 is provided on the third pipe near the refrigerant inlet of the evaporator. The refrigerant outlet of the evaporator is connected to the auxiliary suction port of the compressor via the auxiliary suction pipe.
[0047] Both the compressor and the four-way solenoid valve are connected to the controller and are controlled by the controller.
[0048] This embodiment also proposes a refrigeration control method, employing the refrigeration system described above, such as... Figure 5 As shown, the specific steps include:
[0049] Step 1: Set the refrigeration temperature T0, the first target freezing temperature T3, and the second target freezing temperature T4 in the temperature controller. The second target freezing temperature T4 is less than the first target freezing temperature T3. At this time, the first outlet, the second outlet, and the third outlet of the four-way solenoid valve are all in the open state, and the first check valve, the second check valve, and the third check valve of the compressor are all in the open state.
[0050] Step 2: Use the refrigerator compartment temperature sensor to measure the temperature of the refrigerator compartment and transmit it to the temperature controller. The temperature controller makes a judgment based on the preset refrigerator temperature T0.
[0051] If the measured refrigeration temperature T1 is not less than the preset refrigeration temperature T0, the temperature controller controls the compressor to start. At the same time, the temperature controller controls the first and second check valves of the compressor to open, the first and third outlet ends of the four-way solenoid valve to open, and the second outlet end to close. The temperature of the refrigeration compartment is measured in real time by the refrigeration compartment temperature sensor and transmitted to the temperature controller. When the refrigeration temperature T1 measured by the refrigeration compartment temperature sensor does not exceed the preset refrigeration temperature T0, proceed to step 3.
[0052] If the measured refrigeration temperature T1 is less than the preset refrigeration temperature T0, proceed directly to step 3.
[0053] Step 3: The temperature of the freezer compartment is measured by the freezer compartment temperature sensor and transmitted to the temperature controller. The temperature controller makes a judgment based on the preset first target freezing temperature T3.
[0054] If the measured freezing temperature T2 is not less than the preset first target freezing temperature T3, the temperature controller controls the first and second outlet ends of the four-way solenoid valve to close and the third outlet end to open, and at the same time controls the first and third check valves of the compressor to close and the second check valve to open, so that the freezing temperature T2 of the freezer compartment is less than the preset first target freezing temperature T3.
[0055] If the measured freezing temperature T2 is less than the preset first target freezing temperature T3, the temperature controller will make a judgment based on the preset second target freezing temperature T4.
[0056] When the freezing temperature T2 is less than the preset second target freezing temperature T4, the compressor stops and proceeds to step 4.
[0057] When the freezing temperature T2 is between the preset first target freezing temperature T3 and the preset second target freezing temperature T4, the temperature controller controls the first, second, and third outlets of the four-way solenoid valve to open. At the same time, the temperature controller controls the first and second check valves of the compressor to open. The freezing compartment temperature sensor measures the temperature of the freezing compartment in real time and transmits it to the temperature controller. When the freezing temperature T2 measured by the freezing compartment temperature sensor is less than the preset second target freezing temperature T4, the compressor is turned off and the process proceeds to step 4.
[0058] Step 4: Use the refrigerator compartment temperature sensor to measure the temperature of the refrigerator compartment in real time, and transmit the measured refrigerator temperature T1 to the temperature controller in real time.
[0059] The refrigeration control method proposed in this invention utilizes a refrigerator compartment temperature sensor and a freezer compartment temperature sensor to measure the temperatures of the refrigerator and freezer compartments in real time and transmit the data to a controller. The controller, in conjunction with preset refrigerator temperature T0, preset first target freezing temperature T3, and preset second target freezing temperature T4, controls the temperatures of the refrigerator and freezer compartments by controlling the opening and closing of each outlet of the four-way solenoid valve and each one-way valve on the compressor. The controller ensures that the temperature in the refrigerator compartment is always lower than the preset refrigerator temperature T0, and the temperature in the freezer compartment never exceeds the preset first target freezing temperature T3. Furthermore, when the temperature in the freezer compartment becomes too high, it is quickly lowered to the preset second target freezing temperature T4. By controlling the refrigerator and freezer temperatures in stages, the system avoids wasting cooling capacity while effectively ensuring the refrigeration and preservation effect of the refrigeration system, thus improving the overall efficiency of the refrigeration system.
[0060] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are not intended to limit the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the protection scope of the present invention.
Claims
1. A refrigeration system, characterized in that, Includes compressor, condenser, four-way solenoid valve, refrigeration evaporator, freezing evaporator and temperature control module; The temperature control module includes a refrigerator compartment temperature sensor, a freezer compartment temperature sensor, and a controller. The refrigerator compartment temperature sensor is located inside the refrigerator compartment and is used to measure the temperature inside the refrigerator compartment. The freezer compartment temperature sensor is located inside the freezer compartment and is used to measure the temperature inside the freezer compartment. The refrigerator compartment temperature sensor and the freezer compartment temperature sensor are respectively connected to the controller. The compressor is equipped with a main suction port, a secondary suction port and a discharge port. The discharge port is connected to the refrigerant inlet of the condenser through a discharge pipe, and the refrigerant outlet of the condenser is connected to the inlet of the four-way solenoid valve through a pipe. The first outlet of the four-way solenoid valve is connected to the refrigerant inlet of the refrigeration evaporator through a first pipeline, and the refrigerant outlet of the refrigeration evaporator is connected to the main suction port of the compressor through a main suction pipeline. The second outlet of the four-way solenoid valve is connected to the refrigerant inlet of the refrigeration evaporator through a second pipeline. The section of the second pipeline at the refrigeration evaporator is set as a coil. A cold guide plate is set between the coil and the refrigeration evaporator. The refrigeration evaporator and the coil are located on both sides of the cold guide plate to improve the heat exchange efficiency of the refrigeration compartment. The third outlet of the four-way solenoid valve is connected to the refrigerant inlet of the evaporator via a third pipeline, and the refrigerant outlet of the evaporator is connected to the auxiliary suction port of the compressor via an auxiliary suction pipeline. Both the compressor and the four-way solenoid valve are connected to the controller.
2. The refrigeration system according to claim 1, characterized in that, A first capillary tube is installed on the first pipeline near the refrigerant inlet end of the refrigeration evaporator, and a second capillary tube is installed on the third pipeline near the refrigerant inlet end of the refrigeration evaporator.
3. The refrigeration system according to claim 1, characterized in that, A first one-way valve is provided at the main air intake port, a second one-way valve is provided at the auxiliary air intake port, and a third one-way valve is provided at the exhaust port. The first one-way valve, the second one-way valve, and the third one-way valve are respectively connected to the controller.
4. The refrigeration system according to claim 1, characterized in that, The coil is formed by bending a single evaporator tube to create a main structure with parallel straight tubes in the middle and U-shaped ends at both ends. The spacing between adjacent parallel straight tubes in the upper part of the refrigeration evaporator is smaller than the spacing between adjacent parallel straight tubes in the lower part of the refrigeration evaporator.
5. A refrigeration control method, characterized in that, The refrigeration system described in claim 3 specifically includes the following steps: Step 1: Set the refrigeration temperature T0, the first target freezing temperature T3, and the second target freezing temperature T4 in the temperature controller. The second target freezing temperature T4 is less than the first target freezing temperature T3. At this time, the first outlet, the second outlet, and the third outlet of the four-way solenoid valve are all in the open state, and the first check valve, the second check valve, and the third check valve of the compressor are all in the open state. Step 2: Use the refrigerator compartment temperature sensor to measure the temperature of the refrigerator compartment and transmit it to the temperature controller. The temperature controller makes a judgment based on the preset refrigerator temperature T0. If the measured refrigeration temperature T1 is not less than the preset refrigeration temperature T0, the temperature controller controls the compressor to start. At the same time, the temperature controller controls the first and second check valves of the compressor to open, the first and third outlet ends of the four-way solenoid valve to open, and the second outlet end to close. The temperature of the refrigeration compartment is measured in real time by the refrigeration compartment temperature sensor and transmitted to the temperature controller. When the refrigeration temperature T1 measured by the refrigeration compartment temperature sensor does not exceed the preset refrigeration temperature T0, proceed to step 3. If the measured refrigeration temperature T1 is less than the preset refrigeration temperature T0, proceed directly to step 3; Step 3: The temperature of the freezer compartment is measured by the freezer compartment temperature sensor and transmitted to the temperature controller. The temperature controller makes a judgment based on the preset first target freezing temperature T3. If the measured freezing temperature T2 is not less than the preset first target freezing temperature T3, the temperature controller controls the first and second outlet ends of the four-way solenoid valve to close and the third outlet end to open, and at the same time controls the first and third check valves of the compressor to close and the second check valve to open, so that the freezing temperature T2 of the freezer compartment is less than the preset first target freezing temperature T3. If the measured freezing temperature T2 is less than the preset first target freezing temperature T3, the temperature controller will make a judgment based on the preset second target freezing temperature T4. When the freezing temperature T2 is less than the preset second target freezing temperature T4, the compressor stops and proceeds to step 4. When the freezing temperature T2 is between the preset first target freezing temperature T3 and the preset second target freezing temperature T4, the temperature controller controls the first, second, and third outlet ends of the four-way solenoid valve to open. At the same time, the temperature controller controls the first and second check valves of the compressor to open. The freezing compartment temperature sensor measures the temperature of the freezing compartment in real time and transmits it to the temperature controller. When the freezing temperature T2 measured by the freezing compartment temperature sensor is less than the preset second target freezing temperature T4, the compressor is turned off and the process proceeds to step 4. Step 4: Use the refrigerator compartment temperature sensor to measure the temperature of the refrigerator compartment in real time, and transmit the measured refrigerator temperature T1 to the temperature controller in real time.