Refrigeration display cabinet electric valve control system and method

Abstract

The present application relates to a control system and method for an electric valve of a refrigeration display cabinet. A control method for an electric valve of a refrigeration display cabinet includes receiving a parameter adjustment instruction, parsing the parameter adjustment instruction, adjusting the conditions and parameters of the refrigeration unit, adjusting the conditions and parameters of the defrost unit, receiving a power-on instruction, parsing the power-on instruction, and executing the power-on instruction. A control system for an electric valve of a refrigeration display cabinet includes an electric valve control module for executing the control method for an electric valve of a refrigeration display cabinet, a refrigeration unit connected to the electric valve control module, a defrost unit connected to the electric valve control module, and a display module in communication with the electric valve control module. The present application solves the problem that current electric valves cannot adapt to multiple operating modes of refrigeration display cabinets.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration display cabinets, and in particular to a control system and method for an electric valve of a refrigeration display cabinet. Background Art

[0002] The electric valve is a relatively core component of the refrigeration display cabinet. The electric valve is mainly composed of a three-way valve body, a piston, an electric valve printed circuit board and an electric valve coil. This electric valve can cause three tubes, one of which is the inlet end and the other two are the outlet ends. Most of the time, the one at the inlet end is connected to the drying filter, and the two at the outlet end are connected to the first capillary tube and the second capillary tube. In the initial state of the electric valve, the inlet end is connected to the first capillary tube and the second capillary tube. When the electric valve is energized, the first capillary tube and the second capillary tube will be connected or disconnected. However, the current electric valve control method cannot adapt to multiple working modes such as fault mode, forced test, hardware self-test, test mode, compressor protection and normal operation. To this end, the present application proposes a control system and method for an electric valve of a refrigeration display cabinet. Summary of the Invention

[0003] Based on this, it is necessary to provide a refrigeration display cabinet electric valve control system and method to address the problem that the current electric valve cannot adapt to multiple working modes of the refrigeration display cabinet.

[0004] This application provides a method for controlling an electric valve of a refrigeration display cabinet. The method includes:

[0005] Receive parameter adjustment instructions and parse the parameter adjustment instructions;

[0006] Adjust the conditions and parameters of the refrigeration unit, and adjust the conditions and parameters of the defrost unit;

[0007] Receive power-on instructions and parse the power-on instructions;

[0008] If the power-on command is received for the first time, the compressor protection is activated and the defrost command is fed back to the defrost unit, so that the defrost unit generates electric heat to defrost the area to be defrosted.

[0009] If the power-on command is forced test or test mode, the cooling command is fed back to the electric valve to adjust the electric valve to the pipeline connected to the refrigeration unit. Then the defrost command is fed back to the electric valve to adjust the electric valve to the pipeline connected to the defrost unit.

[0010] If the power-on instruction is a hardware self-test, the parameter information is fed back to the display module, and then the normal operation mode is entered. The normal operation mode includes: receiving information from the temperature detection module, feeding back a defrost instruction to the defrost unit, and then feeding back a refrigeration instruction to the refrigeration unit;

[0011] If the power-on command is a fault mode, a fault code will be fed back.

[0012] Furthermore, a work list for each mode is established;

[0013] Receive the priority comparison instruction between the defrost instruction and the refrigeration instruction;

[0014] Receive the operation trigger parameters of the refrigeration unit and defrost unit in each mode;

[0015] Import each mode into the work list, import the operation trigger parameters of each mode of the refrigeration unit and the defrost unit into the work list, import the operation trigger parameters of each mode of the refrigeration unit and the defrost unit into the work list.

[0016] Furthermore, a current working status table is established;

[0017] Import the currently received instructions into the current working status table;

[0018] Issue control instructions;

[0019] Import control instructions into the current working status table;

[0020] Define a work cycle and refresh the current work status table in a work cycle.

[0021] Furthermore, if the refrigeration unit is not working and the temperature of the refrigerated display case is at a preset threshold of normal temperature, it is determined that the power-on instruction is a first-time received power-on instruction;

[0022] If the level signal of the electric valve exceeds the preset time, it is determined that the power-on instruction is a forced test or test mode;

[0023] If the received potential signal is within the preset threshold and the level signal of the electric valve exceeds the preset time, it is determined that the power-on instruction is the hardware self-test mode;

[0024] If the refrigeration unit operates continuously and the temperature of the refrigerated display case is higher than a preset threshold, the power-on command is determined to be a fault mode;

[0025] According to the received level signal, the working mode is determined to be one of a fault mode, a forced test, a hardware self-check, a test mode, a compressor protection and a normal operation.

[0026] Furthermore, the priority of the failure mode is higher than that of the mandatory test;

[0027] The mandatory test has a higher priority than the hardware self-test;

[0028] The hardware self-test has a higher priority than the test mode;

[0029] The test mode has a higher priority than the compressor protection;

[0030] The compressor protection has a higher priority than the normal operation.

[0031] Further, receiving ice making instructions and defrost unit parameters;

[0032] If defrosting is required, the defrost command is fed back to the electric valve so that the electric valve is connected to the pipeline of the defrost unit;

[0033] If defrosting is not required or the defrosting unit has finished defrosting, the ice-making instruction is fed back to the electric valve so that the electric valve is connected to the pipeline of the refrigeration unit.

[0034] Further, receiving a forced test or test mode start instruction;

[0035] Feedback a start instruction to the electric valve, so that the electric valve is connected to the pipeline of the refrigeration unit, and the time when the electric valve is connected to the pipeline of the refrigeration unit is recorded;

[0036] According to the preset time threshold, the valve enters the normal operation mode and records the time the electric valve is in the normal operation mode;

[0037] When the time for the electric valve to be in normal operation mode is reached, it will automatically exit the forced test or test mode.

[0038] Further, receiving a hardware self-test start instruction;

[0039] Feedback the rotation command to the electric valve to drive the electric valve to switch the valve;

[0040] Feedback cooling instructions to the electric valve, so that the electric valve adjusts the pipeline connected to the refrigeration unit;

[0041] Receive the electric valve action information, if normal, exit the hardware self-test, if abnormal, feedback information to the buzzer.

[0042] Furthermore, if a communication abnormality signal is received, a fault code C0 is fed back;

[0043] If the sensor in the receiving box sends an abnormal signal, the fault code E1 will be fed back;

[0044] If an abnormal signal is received from the defrost sensor, the fault code E2 will be fed back;

[0045] If an abnormal door opening alarm signal is received, the fault code dr will be fed back;

[0046] If a high temperature alarm abnormal signal is received, the fault code EH will be fed back;

[0047] If a low temperature alarm abnormal signal is received, the fault code EL will be fed back;

[0048] If no alarm abnormality signal is received, no fault code will be output externally.

[0049] The present application also provides a refrigeration display cabinet electric valve control system, comprising: an electric valve control module, used in a refrigeration display cabinet electric valve control method;

[0050] a refrigeration unit connected to the electric valve control module;

[0051] a defrost unit connected to the electric valve control module;

[0052] The display module is communicatively connected with the electric valve control module.

[0053] Advantages of this application:

[0054] A work list for each mode is set up to cooperate with the analysis of power-on instructions, which is conducive to the analysis of power-on instructions and increases the adaptability of the electric valve control method;

[0055] A current working status table is set up to save the current working status of each electronic unit, which is conducive to quickly restoring the working status before the power outage after the entire system is accidentally powered off;

[0056] Working instructions of various working modes are set to control each electronic unit to execute various working modes, which is beneficial for the entire refrigeration display cabinet to complete various detection and fault feedback functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings, which constitute part of this application, are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The accompanying drawings of the exemplary embodiments of this application and their descriptions are used to explain this application.

[0058] It does not constitute an improper limitation of this application.

[0059] Figure 1 This is a flow chart of a method for controlling an electric valve of a refrigeration display cabinet provided in one embodiment of the present application.

[0060] Figure 2 This is a module connection diagram of a refrigeration display cabinet electric valve control system provided in one embodiment of the present application.

[0061] Reference numerals:

[0062] 100-Electric valve control module; 200-Refrigeration unit; 300-Defrost unit; 400-Display module. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0064] The present application provides a control system and method for an electric valve of a refrigeration display cabinet.

[0065] like Figure 1 As shown, in one embodiment of the present application, a method for controlling an electric valve of a refrigeration display cabinet includes:

[0066] S100: Receive a parameter adjustment instruction and parse the parameter adjustment instruction.

[0067] S200, adjusting the conditions and parameters of the refrigeration unit, and adjusting the conditions and parameters of the defrost unit.

[0068] S300: Receive a power-on instruction and parse the power-on instruction.

[0069] In step S400, if the power-on command is received for the first time, the compressor protection is entered, and the defrost command is fed back to the defrost unit, so that the defrost unit generates electric heat to perform defrost processing on the area to be defrosted.

[0070] S500, if the power-on instruction is forced test or test mode, the cooling instruction is fed back to the electric valve so that the electric valve adjusts the pipeline connected to the refrigeration unit, and then the defrost instruction is fed back to the electric valve so that the electric valve adjusts the pipeline connected to the defrost unit.

[0071] S600, if the power-on instruction is a hardware self-test, the parameter information is fed back to the display module, and then the normal operation mode is entered. The normal operation mode includes: receiving information from the temperature detection module, and feeding back the defrost instruction to the defrost unit, and then feeding back the refrigeration instruction to the refrigeration unit.

[0072] S700: If the power-on command is a fault mode, a fault code is fed back.

[0073] This embodiment relates to a method for controlling an electric valve in a refrigeration display cabinet. By acquiring instructions, the method determines the conditions and parameters of the refrigeration and defrosting units in various modes. Furthermore, the method receives and interprets power-on instructions to determine the current mode of the refrigeration display cabinet. Finally, the method issues instructions that cause each component to execute mechanical actions or electronic signals corresponding to the corresponding mode. This method helps resolve the problem of electric valves being unable to adapt to the various operating modes of refrigeration display cabinets.

[0074] In one embodiment of the present application, a method for controlling an electric valve of a refrigeration display cabinet further includes:

[0075] S110, creating a work list for each mode.

[0076] S120: Receive a priority comparison instruction between a defrost instruction and a refrigeration instruction.

[0077] S130: Receive operation trigger parameters of the refrigeration unit and the defrost unit in various modes.

[0078] S140 , importing each mode into a work list, importing the operation trigger parameters of each mode of the refrigeration unit and the defrost unit into the work list, importing the operation trigger parameters of each mode of the refrigeration unit and the defrost unit into the work list.

[0079] S150: Establish a current working status table.

[0080] S160: Import the currently received instruction into the current working status table.

[0081] S170: Issue a control instruction and import the control instruction into the current working state table.

[0082] S180: Define a working cycle and refresh the current working status table in a working cycle.

[0083] This embodiment relates to a method for controlling an electric valve in a refrigerated display case. By setting a work list for each mode, the work list coordinates with the parsing of power-on commands, facilitating parsing of power-on commands and increasing the adaptability of the electric valve control method. By setting a current working state table, the previous working state table stores the current working state of each electronic unit, facilitating rapid restoration of the entire system to its pre-power-off state after an unexpected power outage.

[0084] In one embodiment of the present application, a method for controlling an electric valve of a refrigeration display cabinet further includes:

[0085] S310: If the refrigeration unit is not working and the temperature of the refrigeration display case is at a preset threshold of normal temperature, it is determined that the power-on instruction is received for the first time.

[0086] S320: If the level signal of the electric valve exceeds the preset time, it is determined that the power-on instruction is a forced test or a test mode.

[0087] S330: If the received potential signal is within the preset threshold and the level signal of the electric valve exceeds the preset time, it is determined that the power-on instruction is a hardware self-test mode.

[0088] S340: If the refrigeration unit is continuously operating and the temperature of the refrigeration display case is higher than a preset threshold, it is determined that the power-on instruction is in a fault mode.

[0089] S350 , determining, based on the received level signal, that the operating mode is one of a fault mode, a forced test, a hardware self-check, a test mode, a compressor protection mode, and a normal operation.

[0090] S301: The priority of the failure mode is higher than that of the mandatory test.

[0091] S302: The priority of the mandatory test is higher than the hardware self-test.

[0092] S303: The priority of the hardware self-test is higher than that of the test mode.

[0093] S304: The test mode has a higher priority than the compressor protection.

[0094] S305: The compressor protection has a higher priority than the normal operation.

[0095] S410, receiving an ice making instruction and defrost unit parameters.

[0096] S420: If defrosting is required, a defrosting instruction is fed back to the electric valve so that the electric valve is connected to the pipeline of the defrost unit.

[0097] S430: If defrosting is not required or the defrosting unit has finished defrosting, the ice-making instruction is fed back to the electric valve so that the electric valve is connected to the pipeline of the refrigeration unit.

[0098] S510: Receive a forced test or test mode start instruction.

[0099] S520 , feeding back a start instruction to the electric valve so that the electric valve is connected to the pipeline of the refrigeration unit, and recording the time when the electric valve is connected to the pipeline of the refrigeration unit.

[0100] S530: Entering a normal operation mode according to a preset time threshold, and recording the time the electric valve is in the normal operation mode.

[0101] S540, when the time for the electric valve to be in normal operation mode is reached, it automatically exits the forced test or test mode.

[0102] S610: Receive a hardware self-test start instruction.

[0103] S620: Feedback the rotation command to the electric valve to drive the electric valve to switch the valve.

[0104] S630: Feedback the cooling instruction to the electric valve, so that the electric valve adjusts the pipeline connected to the refrigeration unit.

[0105] S640, receiving the electric valve action information, if normal, exiting the hardware self-test, if abnormal, feedback information to the buzzer.

[0106] S710: If a communication abnormality signal is received, a fault code C0 is fed back.

[0107] S720: If an abnormal signal is received from the sensor in the box, a fault code E1 is fed back.

[0108] S730: If an abnormal defrost sensor signal is received, fault code E2 is fed back.

[0109] S740: If a door opening alarm abnormality signal is received, a fault code dr is fed back.

[0110] S750: If a high temperature alarm abnormality signal is received, the fault code EH is fed back.

[0111] S760: If a low temperature alarm abnormality signal is received, a fault code EL is fed back.

[0112] S770: If no alarm abnormality signal is received, no fault code is output externally.

[0113] This embodiment relates to a method for controlling an electric valve in a refrigeration display cabinet. This embodiment details the specific implementation methods for fault modes, forced testing, hardware self-test, test mode, compressor protection, and normal operation. This method provides operating instructions for various operating modes, controlling each electronic unit to execute each mode. This facilitates the entire refrigeration display cabinet in performing various detection and fault feedback functions.

[0114] The present application also provides a refrigeration display cabinet electric valve control system.

[0115] like Figure 2 As shown, in one embodiment of the present application, a refrigeration display case electric valve control system includes: an electric valve control module 100 for executing a refrigeration display case electric valve control method; a refrigeration unit 200 connected to the electric valve control module 100; a defrost unit 300 connected to the electric valve control module 100; and a display module 400 in communication with the electric valve control module 100.

[0116] This embodiment relates to a motorized valve control system for a refrigerated display cabinet. The refrigeration unit 200, defrost unit 300, and display module 400 execute control commands from the motorized valve control module 100. It's worth noting that the motorized valve control module 100 also includes a mechanical component, the motorized valve, which adjusts the interface orientation of the refrigeration unit 200 and defrost unit 300 piping.

[0117] The various technical features of the above-described embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. In order to make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] 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 the present application. 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 method for controlling an electric valve of a refrigeration display cabinet, characterized in that: include: Receive parameter adjustment instructions and parse the parameter adjustment instructions; Adjust the conditions and parameters of the refrigeration unit, and adjust the conditions and parameters of the defrost unit; Receiving a power-on command and parsing the power-on command, including: if the refrigeration unit is not working and the temperature of the refrigeration display case is at a preset threshold of normal temperature, determining that the power-on command is the first power-on command received; if the level signal of the electric valve exceeds a preset time, determining that the power-on command is a forced test or test mode; if the received potential signal is within a preset threshold and the level signal of the electric valve exceeds a preset time, determining that the power-on command is a hardware self-test mode; if the refrigeration unit is continuously working and the temperature of the refrigeration display case is higher than a preset threshold, determining that the power-on command is a fault mode; and determining, based on the received level signal, that the operating mode is one of a fault mode, forced test, hardware self-test, test mode, compressor protection, and normal operation; If the power-on command is received for the first time, the compressor protection is activated and the defrost command is fed back to the defrost unit, so that the defrost unit generates electric heat to defrost the area to be defrosted. If the power-on instruction is a forced test or a test mode, a refrigeration instruction is fed back to the electric valve so that the electric valve adjusts to be connected to the pipeline of the refrigeration unit, and then a defrost instruction is fed back to the electric valve so that the electric valve adjusts to be connected to the pipeline of the defrost unit, including: receiving a forced test or a test mode start instruction; feeding back a start instruction to the electric valve so that the electric valve is connected to the pipeline of the refrigeration unit, and recording the time when the electric valve is connected to the pipeline of the refrigeration unit; entering a normal operation mode according to a preset time threshold, and recording the time when the electric valve is in the normal operation mode; and automatically exiting the forced test or test mode when the time when the electric valve is in the normal operation mode is reached; If the power-on instruction is a hardware self-test, the parameter information is fed back to the display module, and then the normal operation mode is entered. The normal operation mode includes: receiving information from the temperature detection module, feeding back a defrost instruction to the defrost unit, and then feeding back a refrigeration instruction to the refrigeration unit; If the power-on command is a fault mode, a fault code will be fed back.

2. The refrigeration showcase electric valve control method according to claim 1, characterized in that: The steps of receiving the parameter adjustment instruction and parsing the parameter adjustment instruction include: Establish work lists for each mode; Receive the priority comparison instruction between the defrost instruction and the refrigeration instruction; Receive the operation trigger parameters of the refrigeration unit and defrost unit in each mode; Import each mode into the work list, import the operation trigger parameters of each mode of the refrigeration unit and the defrost unit into the work list, import the operation trigger parameters of each mode of the refrigeration unit and the defrost unit into the work list.

3. The refrigeration showcase electric valve control method according to claim 2, characterized in that: The steps of receiving the parameter adjustment instruction and parsing the parameter adjustment instruction include: Establish current working status table; Import the currently received instructions into the current working status table; Issue control instructions; Import control instructions into the current working status table; Define a work cycle and refresh the current work status table in a work cycle.

4. The refrigeration showcase electric valve control method according to claim 1, characterized in that: The steps of receiving the power-on instruction and parsing the power-on instruction further include: The failure mode has a higher priority than the mandatory test; The mandatory test has a higher priority than the hardware self-test; The hardware self-test has a higher priority than the test mode; The test mode has a higher priority than the compressor protection; The compressor protection has a higher priority than the normal operation.

5. The refrigeration showcase electric valve control method according to claim 4, characterized in that: If the power-on command is received for the first time, the compressor protection is activated and the defrost command is fed back to the defrost unit, causing the defrost unit to generate electric heat to defrost the area to be defrosted, including: Receive ice making instructions and defrost unit parameters; If defrosting is required, the defrost command is fed back to the electric valve so that the electric valve is connected to the pipeline of the defrost unit; If defrosting is not required or the defrosting unit has finished defrosting, the ice-making instruction is fed back to the electric valve so that the electric valve is connected to the pipeline of the refrigeration unit.

6. The refrigeration showcase electric valve control method according to claim 5, characterized in that: If the power-on instruction is a hardware self-test, the parameter information is fed back to the display module, and then the normal operation mode is entered. The normal operation mode includes: receiving information from the temperature detection module, feeding back the defrost instruction to the defrost unit, and then feeding back the refrigeration instruction to the refrigeration unit, including: Receive hardware self-test start instruction; Feedback the rotation command to the electric valve to drive the electric valve to switch the valve; Feedback cooling instructions to the electric valve, so that the electric valve adjusts the pipeline connected to the refrigeration unit; Receive the electric valve action information, if normal, exit the hardware self-test, if abnormal, feedback information to the buzzer.

7. The refrigeration showcase electric valve control method according to claim 6, characterized in that: If the power-on instruction is a fault mode, the step of feeding back a fault code includes: If a communication abnormality signal is received, the fault code C0 will be fed back; If the sensor in the receiving box sends an abnormal signal, the fault code E1 will be fed back; If an abnormal signal is received from the defrost sensor, the fault code E2 will be fed back; If an abnormal door opening alarm signal is received, the fault code dr will be fed back; If a high temperature alarm abnormal signal is received, the fault code EH will be fed back; If a low temperature alarm abnormal signal is received, the fault code EL will be fed back; If no alarm abnormality signal is received, no fault code will be output externally.

8. A refrigeration display cabinet electric valve control system, characterized in that: include: An electric valve control module, configured to execute the electric valve control method for a refrigeration display cabinet according to any one of claims 1 to 7; a refrigeration unit connected to the electric valve control module; a defrost unit connected to the electric valve control module; The display module is communicatively connected with the electric valve control module.

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