CN112432394A - Control and abnormality detection method and device for electric switching valve and refrigeration equipment - Google Patents
Control and abnormality detection method and device for electric switching valve and refrigeration equipment Download PDFInfo
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- CN112432394A CN112432394A CN202011346715.4A CN202011346715A CN112432394A CN 112432394 A CN112432394 A CN 112432394A CN 202011346715 A CN202011346715 A CN 202011346715A CN 112432394 A CN112432394 A CN 112432394A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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Abstract
The disclosure provides a method and a device for controlling an electric switching valve and detecting abnormity of the electric switching valve and refrigeration equipment, and relates to the technical field of refrigeration equipment. The disclosed electric changeover valve control method includes: acquiring the current temperature of a refrigeration area; under the condition that the duration that the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset duration threshold value, if the reset times of the electric switching valve after the electric switching valve is switched to the current specified working state and the current temperature does not reach the target temperature threshold value are smaller than the preset reset time threshold value, the electric switching valve is controlled to reset; the reset is that the electric switching valve is switched from the current state to the initial state and then switched to the target state of the electric switching valve in the current specified working state. By the method, the problem that the repeated resetting of the electric switching valve delays the abnormal examination can be avoided, and the efficiency of abnormal processing is improved.
Description
Technical Field
The disclosure relates to the technical field of refrigeration equipment, in particular to a method and a device for controlling and detecting abnormality of an electric switching valve and refrigeration equipment.
Background
The direct-cooling refrigerator is switched by an electric switching valve to refrigerate each chamber, and each chamber meets the corresponding chamber temperature requirement through the control of the electric switching valve.
The electric switching valve may cause valve switching abnormality due to the refrigerator system pressure or the presence of impurities in the piping during switching. When the signal sent by the main control board requires the switching of the electric switching valve, the electric switching valve is not switched due to the abnormality, so that the temperature of one compartment is too high, the temperature of the other compartment is too low, the refrigeration of the refrigerator is abnormal, and the food storage requirement of the refrigerator cannot be met.
Disclosure of Invention
It is an object of the present disclosure to improve the efficiency of refrigerant system exception handling.
According to an aspect of some embodiments of the present disclosure, there is provided an electric switching valve control method including: acquiring the current temperature of a refrigeration area; under the condition that the duration that the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset duration threshold value, if the reset times of the electric switching valve after the electric switching valve is switched to the current specified working state and the current temperature does not reach the target temperature threshold value are smaller than the preset reset time threshold value, the electric switching valve is controlled to reset; the reset is that the electric switching valve is switched from the current state to the initial state and then switched to the target state of the electric switching valve in the current specified working state.
In some embodiments, the electric switching valve control method further comprises: and under the condition that the duration of the current temperature which does not reach the target temperature threshold value in the current specified working state reaches the preset duration threshold value, if the resetting times of the electric switching valve are more than or equal to the preset resetting times threshold value, the current state of the electric switching valve is maintained.
In some embodiments, the electric switching valve control method further comprises: and if the current specified working state of the refrigeration area is switched or the current temperature reaches the target temperature threshold value, initializing the reset times of the electric switching valve to be 0.
In some embodiments, the current temperature not reaching the target temperature threshold at the current specified operating state comprises at least one of: under the condition that the current specified working state comprises a refrigeration demand, the current temperature is higher than a first threshold of the target temperature in the current specified working state; or in the case that the current designated operating state includes no cooling demand, the current temperature is lower than the second threshold of the target temperature in the current designated operating state.
In some embodiments, in the case that it is determined that the duration of the current temperature not reaching the target temperature threshold in the current specified operating state reaches the predetermined duration threshold, if the number of resets of the electric changeover valve after the current temperature not reaching the target temperature threshold is less than the predetermined number of resets threshold, the controlling the electric changeover valve to reset includes: acquiring a target temperature threshold according to the current specified working state; judging whether the current temperature reaches a target temperature threshold value; if the current temperature does not reach the target temperature threshold value, starting timing; if the current temperature does not reach the target temperature threshold when the timing reaches the preset time threshold, judging that the reset times are smaller than the preset reset time threshold; if the resetting frequency is less than the preset resetting frequency threshold value, controlling the electric switching valve to reset, adding 1 to the resetting frequency of the electric switching valve, and controlling the timer to count again; otherwise, the current state of the electric switching valve is kept.
In some embodiments, where the refrigerated area is a refrigerated compartment, determining that a duration for which the current temperature does not reach the target temperature threshold at the currently specified operating state reaches the predetermined duration threshold comprises one or more of: if the refrigeration requirement exists currently, judging whether the detection temperature of the evaporation sensor is higher than a refrigeration target temperature threshold value; if the detection temperature of the evaporation sensor is higher than the refrigeration target temperature threshold value, timing is started; if the detection temperature of the evaporation sensor is continuously higher than the refrigeration target temperature threshold value within the preset first time period, determining that the duration time when the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset time period threshold value; or if the refrigeration requirement does not exist currently, judging whether the detection temperature of the evaporation sensor is lower than the refrigeration target temperature threshold value; if the detection temperature of the evaporation sensor is lower than the refrigeration target temperature threshold value, timing is started; and if the detection temperature of the evaporation sensor is continuously lower than the refrigeration target temperature threshold value within the preset second time, determining that the duration time when the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset time threshold value.
In some embodiments, where the refrigerated area is a freezer compartment, determining that the duration for which the current temperature does not reach the target temperature threshold for the currently specified operating state reaches the predetermined duration threshold comprises one or more of: if the temperature is in the temperature-changing refrigeration working state, judging whether the temperature detected by the freezing sensor is higher than the temperature-changing target temperature threshold of the freezing chamber; if the detection temperature of the freezing sensor is higher than the temperature-changing target temperature threshold of the freezing chamber, timing is started; if the detection temperature of the freezing sensor is continuously higher than the temperature-changing target temperature threshold of the freezing chamber within the preset third time, determining that the duration time when the current temperature does not reach the target temperature threshold in the current specified working state reaches the preset time threshold; or if the current working state of refrigeration is in the refrigeration working state, judging whether the detection temperature of the refrigeration sensor is higher than the refrigeration target temperature threshold value; if the detection temperature of the freezing sensor is higher than the freezing target temperature threshold value, timing is started; and if the detection temperature of the freezing sensor is continuously higher than the freezing target temperature threshold value within the preset fourth time, determining that the duration time when the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset time threshold value.
In some embodiments, in the case where the refrigerated area is a temperature-changing room, determining that a duration for which the current temperature does not reach the target temperature threshold at the currently specified operating state reaches the predetermined duration threshold comprises: if the temperature sensor is in the working state, judging whether the detection temperature of the freezing sensor is higher than the target temperature threshold of the temperature-changing chamber; if the detection temperature of the freezing sensor is higher than the target temperature threshold of the temperature-changing chamber, timing is started; and if the detection temperature of the freezing sensor is continuously higher than the target temperature threshold of the variable temperature chamber within the preset fifth time, determining that the duration time when the current temperature does not reach the target temperature threshold in the current specified working state reaches the preset time threshold.
In some embodiments, the electrical switching valve control method further comprises at least one of: acquiring the detection temperature of a compartment sensor in a refrigeration area; when the time length that the temperature detected by the compartment sensor is higher than the temperature of the starting point corresponding to the refrigeration area is longer than the preset fifth time length, or the time length that the temperature detected by the compartment sensor is lower than the temperature of the stopping point corresponding to the refrigeration area is longer than the preset sixth time length, the electric switching valve is controlled to reset; after power-on, the electric switching valve is controlled to reset; or after the power is on, when the running time reaches the preset reset time, the electric switching valve is controlled to reset.
By the method, when the refrigeration state of the refrigeration area is determined to be abnormal, the electric switching valve is tried to be adjusted in a resetting mode, and when the adjustment frequency reaches the preset resetting frequency threshold value and the refrigeration state is not recovered, the abnormality caused by incorrect position of the electric switching valve is eliminated, so that delay of abnormal troubleshooting due to repeated resetting of the electric switching valve is avoided, and the efficiency of abnormal processing is improved.
According to an aspect of some embodiments of the present disclosure, there is provided an abnormality detection method including: any one of the electric changeover valve control methods mentioned hereinabove; and if the current temperature does not reach the target temperature threshold value in the current specified working state and the resetting times of the electric switching valve are more than or equal to the preset resetting time threshold value, the fault of the electric switching valve is eliminated.
In some embodiments, the anomaly detection method further comprises: determining whether a compressor state is normal; in the case where the compressor is normal, the electric changeover valve control method of any one of the above is performed.
By the method, the abnormality caused by incorrect position of the electric switching valve can be eliminated in time, delay of abnormality elimination caused by repeated resetting of the electric switching valve is avoided, and the efficiency of abnormality treatment is improved.
According to an aspect of some embodiments of the present disclosure, there is provided an electric switching valve control apparatus including: a temperature acquisition unit configured to acquire a current temperature of the refrigeration area; the temperature comparison unit is configured to activate the reset control unit under the condition that the duration time that the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset time threshold value; the reset control unit is configured to control the electric switching valve to reset if the reset times of the electric switching valve after the electric switching valve is switched to the current specified working state and the current temperature does not reach the target temperature threshold value are less than a preset reset time threshold value after being activated by the temperature comparison unit; the reset is that the electric switching valve is switched from the current state to the initial state and then switched to the target state of the electric switching valve in the current specified working state.
In some embodiments, the temperature acquisition unit is further configured to acquire a compartment sensor detection temperature of the refrigeration zone; the temperature comparison unit is also configured to send a reset instruction to the reset control unit under the condition that the time length for which the compartment sensor detects that the temperature is higher than the starting point temperature of the corresponding refrigeration area is longer than a preset fifth time length, or the time length for which the compartment sensor detects that the temperature is lower than the stopping point temperature of the corresponding refrigeration area is longer than a preset sixth time length; the reset control unit is also configured to control the electric changeover valve to reset when receiving a reset instruction.
In some embodiments, the reset control unit is further configured to perform at least one of: after power-on, the electric switching valve is controlled to reset; or controlling the electric switching valve to reset under the condition that the power-on operation time reaches the preset reset time.
The electric switching valve control device can try to adjust by controlling the electric switching valve to reset when the refrigeration state of the refrigeration area is determined to be abnormal, and when the adjustment frequency reaches the preset reset frequency threshold value and the refrigeration state is not recovered, the abnormality caused by incorrect position of the electric switching valve is eliminated, the problem that the repeated resetting of the electric switching valve delays the abnormality investigation is avoided, and the abnormality processing efficiency is improved.
According to an aspect of some embodiments of the present disclosure, there is provided an abnormality detection apparatus including: any one of the above electric switching valve control devices; and an electric changeover valve abnormality elimination unit configured to eliminate the failure of the electric changeover valve in a case where the current temperature does not reach the target temperature threshold value in the currently specified operating state and the number of times of resetting of the electric changeover valve is equal to or greater than a predetermined number of times of resetting threshold value.
In some embodiments, the abnormality detection apparatus further includes: and a compressor abnormality detection unit configured to determine whether a state of the compressor is normal, and activate the electric switching valve control device in a case where it is determined that the compressor is normal.
The abnormality detection device can timely eliminate the abnormality caused by incorrect position of the electric switching valve, avoid repeated resetting of the electric switching valve to delay abnormality examination, and improve the efficiency of abnormality treatment.
According to an aspect of some embodiments of the present disclosure, there is provided a refrigeration system control apparatus including: a memory; and a processor coupled to the memory, the processor configured to perform any of the above methods based on instructions stored in the memory.
According to an aspect of some embodiments of the present disclosure, a computer-readable storage medium is proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of any one of the methods above.
According to an aspect of some embodiments of the present disclosure, there is provided a refrigeration apparatus including: a refrigeration system control as hereinbefore described; an electric switching valve configured to switch states under control of the refrigeration system control device; and one or more refrigerated areas configured to provide space for storing items.
When the refrigeration state of the refrigeration area is abnormal, the refrigeration equipment tries to adjust by controlling the electric switching valve to reset, when the adjustment frequency reaches the preset reset frequency threshold value and the refrigeration state is not recovered, the abnormality caused by incorrect position of the electric switching valve is eliminated, the delay of abnormal investigation caused by repeated resetting of the electric switching valve is avoided, the efficiency of abnormal processing is improved, and the refrigeration stability is further improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is a schematic diagram of a related art refrigeration system.
Fig. 2 is a flow chart of some embodiments of an electrically switchable valve control method of the present disclosure.
Fig. 3 is a flow chart of further embodiments of an electrical switching valve control method of the present disclosure.
Fig. 4 is a flow chart of some embodiments of an anomaly detection method of the present disclosure.
Fig. 5 is a schematic diagram of some embodiments of an electrically switched valve control of the present disclosure.
Fig. 6 is a schematic diagram of some embodiments of an anomaly detection apparatus of the present disclosure.
Fig. 7 is a schematic diagram of some embodiments of a refrigeration system control of the present disclosure.
Fig. 8 is a schematic diagram of further embodiments of refrigeration system controls of the present disclosure.
Fig. 9 is a schematic view of some embodiments of refrigeration appliances of the present disclosure.
Detailed Description
The technical solution of the present disclosure is further described in detail by the accompanying drawings and examples.
A flow chart of some embodiments of the electrical switching valve control method of the present disclosure is shown in fig. 2.
In step 201, the current temperature of the refrigerated area is obtained. In some embodiments, a temperature sensor may be deployed in a refrigeration device to acquire a current temperature of a corresponding refrigeration zone. In some embodiments, the temperature of the refrigerated compartment collected by the evaporation sensor may be obtained; in some embodiments, the temperature of the freezing chamber (including the freezing chamber with the temperature changing function) collected by the freezing temperature sensor can be obtained.
In step 202, it is determined whether the current temperature has not reached the target temperature threshold in the currently specified operating state and the duration has reached the predetermined duration threshold. If the current temperature does not reach the target temperature threshold value in the current specified working state and the duration time reaches the preset time threshold value, executing step 203; otherwise, determining to be in a normal refrigeration state.
In some embodiments, in the case that the current designated operating state includes a cooling demand, the current temperature not reaching the target temperature threshold value in the current designated operating state means that the current temperature is higher than the target temperature first threshold value in the current designated operating state. In some embodiments, in the case where the current designated operating state includes no cooling demand, the current temperature not reaching the target temperature threshold value in the current designated operating state means that the current temperature is lower than the target temperature second threshold value in the current designated operating state. In some embodiments, the target temperature first threshold and the target temperature second threshold may be the same or different. In some embodiments, the thresholds may be set and modified by testing.
In step 203, it is determined whether the reset times of the electric changeover valve after being switched to the current specified operating state and the current temperature not reaching the target temperature threshold are less than a predetermined reset time threshold. The counting of the reset times can be initialized after the working state of the refrigeration area is switched and the current temperature reaches the target temperature threshold value. In some embodiments, the number of resets after initialization is 0. In some embodiments, the predetermined reset number threshold may be 3.
If the reset times are less than the predetermined reset times threshold, step 204 is executed.
In step 204, the electric changeover valve is controlled to be reset. The operation of resetting the corresponding electric changeover valve is as follows: and after the electric switching valve is switched to the initial state, the electric switching valve is immediately switched to the corresponding state in the currently specified working state of the refrigeration area.
By the method, when the refrigeration state of the refrigeration area is determined to be abnormal, the electric switching valve is tried to be adjusted in a resetting mode, and when the adjustment frequency reaches the preset resetting frequency threshold value and the refrigeration state is not recovered, the abnormality caused by incorrect position of the electric switching valve is eliminated, so that delay of abnormal troubleshooting due to repeated resetting of the electric switching valve is avoided, and the efficiency of abnormal processing is improved.
In some embodiments, as shown in fig. 2, the electric switching valve control method may further include: in step 204, if the number of resets is equal to or greater than the predetermined number of resets threshold, step 205 is executed to keep the current state of the electric changeover valve and not to make a reset changeover.
By the method, the electric switching valve can be prevented from being switched repeatedly, abrasion is reduced, and the service life of equipment is prolonged.
In the electric switching valve control method of the present disclosure, a flowchart of some embodiments of the operations in steps 202, 203 as described above is shown in fig. 3.
In step 301, a target temperature threshold is obtained according to a current designated operating state. In some embodiments, different target temperature thresholds may be set for the cold room, the freezer, and the warming room. And acquiring corresponding target temperature threshold values according to the difference of the current working states of the refrigeration area and the refrigeration area.
In step 302, it is determined whether the current temperature reaches a target temperature threshold, such as determining whether the temperature is lower than the corresponding target temperature threshold in a cooling state or determining whether the temperature is higher than the corresponding target temperature threshold in a non-cooling state. If the current temperature does not reach the target temperature threshold, go to step 304; if the current temperature reaches the target temperature threshold, step 303 is executed.
In step 303, the number of times of resetting of the electric changeover valve is initialized to 0.
In step 304, the count from 0 is started.
In step 305, it is determined that the current temperature does not reach the target temperature threshold when the timer reaches the predetermined time threshold. In some embodiments, the predetermined time period threshold may be different for different refrigeration zones, different current designated operating conditions.
If the current temperature still fails to reach the target temperature threshold after the timing reaches the corresponding preset time threshold, executing step 306; otherwise step 303 is performed.
In step 306, it is determined whether the number of resets is equal to (greater than or equal to) a predetermined reset number threshold. If the reset time is equal to (greater than or equal to) the predetermined reset time threshold, execute step 309; otherwise, step 307 is executed. In some embodiments, the predetermined number of resets may be three times.
In step 307, the electric changeover valve is controlled to be reset.
In step 308, the number of resets is incremented by 1.
In step 309, the current state of the electrically switchable valve is maintained, it is determined that the current abnormality is not caused by an abnormality in the state of the electrically switchable valve, or cannot be eliminated by the reset operation of the electrically switchable valve, and an attempt may be made to resolve or issue an alarm by another method.
By the method, errors accumulated in the moving process of the electric switching valve can be cleared away in time during first reset, and impurities in the refrigeration system can be cleared away by subsequent reset, so that the valve is prevented from being blocked by the impurities; after the resetting operation is executed for several times, if the valve is not recovered to be normal, the valve fault is eliminated, further valve abrasion caused by more times of meaningless valve resetting operation is avoided, meanwhile, other means can be adopted to analyze the abnormal reason in time, and the efficiency of abnormal solution is improved.
In some embodiments, for the refrigerating chamber, a refrigerating evaporation sensor may be provided as a device for acquiring the current temperature, in consideration of that the temperature range of the refrigerating chamber is normally 2-8 ℃, the refrigerating evaporation sensor is attached to a back liner of the refrigerating chamber, the temperature of an evaporator is low, about-20 ℃ during normal refrigeration, and when the temperature is greater than 0 during operation, the temperature is abnormal, but if the temperature returns quickly without a refrigeration request, a target temperature threshold corresponding to the refrigerating evaporation sensor may be set to 0 ℃, so as to accurately determine the abnormal operating state of the refrigerating chamber.
In some embodiments, for the freezing chamber, even under the condition that a refrigeration instruction is not obtained, the effect of freezing articles can be better achieved by keeping the temperature low, so that the abnormal treatment can be carried out only on the condition that the refrigeration requirement is met but the temperature is too high, and the operation load of the system is reduced.
In some embodiments, whether to reset the electric changeover valve may be judged for the refrigerating compartment according to the following conditions:
a. the refrigeration sign is 1 (corresponding to the refrigerating chamber having a refrigeration request)
b. Refrigeration evaporation sensor temperature >0 ℃ (0 ℃ is refrigeration target temperature threshold)
c. Number of resets n1<3
When the conditions of a, b and c are simultaneously met, the timer t1Start timing when t1When the time is more than or equal to 5min (the preset first time length), if a and b are still satisfied, the electric switching valve is reset, and the timer t10, n of Qing1＝n1+1. When the a or b condition is not satisfied, the timer t10, n of Qing1And (5) clearing 0.
For example: the starting point of the refrigerating chamber is 3.5 ℃, the stopping point is 2 ℃, and when the temperature of the refrigerating chamber is 4 ℃, and the temperature sensor of the evaporator of the refrigerating chamber is above 0 ℃, the valve resetting frequency is not more than three times, and the duration is more than 5min, the valve is reset once.
In some embodiments, whether to reset the electric switching valve can be judged for the refrigerating chamber according to the following conditions:
a. the refrigeration sign is 0 (corresponding to no refrigeration request of the cold storage room)
b. The temperature of the refrigeration evaporation sensor is lower than 0 DEG C
c. Number of resets n2<3
When the conditions of a, b and c are simultaneously met, the timer t2Start timing when t2When the time is more than or equal to 30min (the preset second time length), if a and b are still satisfied, the electric switching valve is reset, and the timer t20, n of Qing2＝n2+1. When the a or b condition is not satisfied, the timer t20, n of Qing2And (5) clearing 0.
For example: the starting point of the refrigerating chamber is 3.5 ℃, the stopping point is 2 ℃, and when the temperature of the refrigerating chamber is 2.5 ℃, the temperature sensor of the refrigerating evaporator is at 0 ℃ or below, the valve resetting frequency is not more than three times, and the duration is more than 30min, the valve is reset once.
In some embodiments, the maximum temperature may be adjusted as desired, for example up to-5 ℃ when the freezer compartment is being subjected to a variable temperature chamber treatment. For the freezing chamber with the temperature changing function (assumed as a right freezing chamber), whether or not to reset the electric switching valve can be judged according to the following conditions:
a. right freezing sign is 1 (for temperature-changing room with refrigeration request)
b. Right freezing temperature sensor > -3 ℃ (-3 ℃ is the target temperature threshold of the freezing chamber temperature change)
c. Number of resets n3<3
When the conditions of a, b and c are simultaneously met, the timer t3Start timing when t1When the time is more than or equal to 10min (the preset third time length), if a and b are still satisfied, the electric switching valve is reset, and the timer t30, n of Qing3＝n3+1. When the a or b condition is not satisfied, the timer t30, n of Qing3And (5) clearing 0.
For example: the starting point of the right freezing chamber is-16 ℃, the stopping point is-18 ℃, and when the temperature of the right freezing chamber is-15 ℃, the temperature of the right freezing chamber is-3 ℃ or above, the valve is reset once when the valve resetting frequency is not more than three times and the duration is more than 10 min.
In some embodiments, for the freezing compartment (assumed to be the left freezing compartment) that performs the freezing function, whether or not to perform the electrical switching valve reset may be determined according to the following conditions:
a. left freezing mark is 1 (namely the freezing chamber has a refrigeration request)
b. Left freezing temperature sensor > -10 ℃ (-10 ℃ is freezing target temperature threshold)
c. Number of resets n4<3
When the conditions of a, b and c are simultaneously met, the timer t3Start timing when t1When the time is more than or equal to 30min (the preset fourth time length), if a and b are still satisfied, the electric switching valve is reset, and the timer t is started40, n of Qing4＝n4+1. When the a or b condition is not satisfied, the timer t40, n of Qing4And (5) clearing 0.
In some embodiments, the refrigeration area may also be a conventional temperature-variable chamber, and has a certain refrigeration temperature range, such as-1 ℃ to-7 ℃, and the target temperature threshold of the temperature-variable chamber is set according to the working temperature range of the temperature-variable chamber, such as 0 ℃:
a. the temperature change sign is 1 (corresponding to the temperature change room with refrigeration request)
b. Temperature of temperature-changing chamber sensor is greater than 0 ℃ (assuming 0 ℃ as the target temperature threshold of temperature-changing chamber)
c. Number of resets n1<3
When the conditions of a, b and c are simultaneously met, the meter is usedTimer t1Start timing when t1When the time is longer than or equal to the preset fifth time, if a and b are still satisfied, the electric switching valve is reset, and the timer t10, n of Qing1＝n1+1. When the a or b condition is not satisfied, the timer t10, n of Qing1And (5) clearing 0.
By the method in the embodiment, the corresponding preset time threshold and the target temperature threshold can be set according to different refrigeration areas and refrigeration requirements, so that each area of the refrigeration equipment is respectively monitored, and further electric switching and regulation are performed; the reset condition is set according to the structural characteristics of the direct-cooling refrigerator and the possible temperature abnormity in the refrigeration process, so that the refrigeration reliability of the direct-cooling refrigerator is improved, the possibility of misjudgment is reduced, unnecessary valve reset is reduced, the service life of the refrigerator is prolonged, and the use feeling of a user is improved.
In some embodiments, the compartment sensor detection temperature of the refrigeration area may also be obtained; and under the condition that the time length for detecting the temperature of the compartment sensor to be higher than the temperature of the starting point corresponding to the refrigeration area is longer than the preset fifth time length, or the time length for detecting the temperature of the compartment sensor to be lower than the temperature of the stopping point corresponding to the refrigeration area is longer than the preset sixth time length, the electric switching valve is controlled to reset. In some embodiments, the temperature at the start point and the stop point may be different according to different refrigeration areas, and the corresponding fifth time period and the sixth time period are different. In some embodiments, parameters may be set, adjusted during testing, use. The method can find abnormal refrigeration through the detection of the compartment sensor, thereby increasing a guarantee for the discovery of the abnormality and improving the reliability of the discovery and the solution of the abnormality.
In some embodiments, the electric switching valve is controlled to reset every time the refrigeration device is powered on and started, so that the normal operation of the electric switching valve is prevented from being influenced by the overlarge load during power on under the condition of shutdown caused by power failure.
In some embodiments, when the running time reaches a preset reset time after power-on, for example, about 6 hours, the electric switching valve is controlled to reset, and after the reset, the step pulse is selected according to the refrigeration request. In some embodiments, resetting herein refers to returning to an initial position, thereby readjusting the position according to the no-go pulse. By the method, the normal operation probability of the electric switching valve can be periodically improved, and the electric switching valve is reset once within a certain time to ensure reliability no matter whether the temperature is abnormal or not, so that the probability of failure is reduced. In connection with the schematic of the refrigeration system shown in fig. 1, the selection of the step pulse can be as shown in the following table:
TABLE 1 refrigeration control meter for electric switching valve
A flow chart of some embodiments of the anomaly detection method of the present disclosure is shown in fig. 4.
In step 401, the electric changeover valve control method shown in the above embodiment is executed.
In step 402, it is determined whether the current temperature does not reach the target temperature threshold in the current designated operating state and the number of resets of the electric switch valve is greater than or equal to the predetermined reset threshold. In some embodiments, taking the embodiment in fig. 2 as an example, it is determined whether to proceed to step 205. If yes, go to step 205, go to step 403.
In step 403, the failure of the electric changeover valve is eliminated, and the abnormality may be eliminated in other manners.
By the method, the abnormality caused by incorrect position of the electric switching valve can be eliminated in time, delay of abnormality elimination caused by repeated resetting of the electric switching valve is avoided, and the efficiency of abnormality treatment is improved.
In some embodiments, based on the fault characteristics of the refrigeration system, the operating state of the compressor may be monitored, and the electric switching valve control method may be performed in the event that it is determined that the compressor is operating normally. By the method, the abnormality of the compressor can be found or eliminated preferentially, and the efficiency of abnormality troubleshooting and solving is further improved.
A schematic diagram of some embodiments of the electrically switched valve control of the present disclosure is shown in fig. 5.
The temperature acquisition unit 501 can acquire the current temperature of the cooling area. In some embodiments, a temperature sensor may be deployed in a refrigeration device to acquire a current temperature of a corresponding refrigeration zone. In some embodiments, the temperature of the refrigerated compartment collected by the evaporation sensor may be obtained; in some embodiments, the temperature of the freezing chamber (including the freezing chamber with the temperature changing function) collected by the freezing temperature sensor can be obtained.
The temperature comparing unit 502 can determine whether the current temperature does not reach the target temperature threshold in the currently specified operating state and the duration reaches the predetermined duration threshold. And if the current temperature does not reach the target temperature threshold value in the current specified working state and the duration time reaches the preset time threshold value, activating the reset control unit.
In some embodiments, in the case that the current designated operating state includes a cooling demand, the current temperature not reaching the target temperature threshold value in the current designated operating state means that the current temperature is higher than the target temperature first threshold value in the current designated operating state. In some embodiments, in the case where the current designated operating state includes no cooling demand, the current temperature not reaching the target temperature threshold value in the current designated operating state means that the current temperature is lower than the target temperature second threshold value in the current designated operating state. In some embodiments, the target temperature first threshold may be the same or different. In some embodiments, the thresholds may be set and modified by testing.
The reset control unit 503 is capable of determining whether the number of times of resetting the electric changeover valve after the electric changeover valve is switched to the currently specified operating state and the current temperature does not reach the target temperature threshold is less than a predetermined reset number threshold, and controlling the electric changeover valve to reset in the case where it is determined that the number of times of resetting is less than the predetermined reset number threshold. The operation of resetting the corresponding electric changeover valve is as follows: and after the electric switching valve is switched to the initial state, the electric switching valve is immediately switched to the corresponding state in the currently specified working state of the refrigeration area.
The electric switching valve control device can try to adjust by controlling the electric switching valve to reset when the refrigeration state of the refrigeration area is determined to be abnormal, and when the adjustment frequency reaches the preset reset frequency threshold value and the refrigeration state is not recovered, the abnormality caused by incorrect position of the electric switching valve is eliminated, the problem that the repeated resetting of the electric switching valve delays the abnormality investigation is avoided, and the abnormality processing efficiency is improved.
In some embodiments, the temperature acquisition unit 501 is also capable of acquiring a compartment sensor detection temperature of the refrigeration zone. The temperature comparison unit 502 is further capable of sending a reset instruction to the reset control unit when a duration that the temperature detected by the compartment sensor is higher than the temperature at the start point corresponding to the refrigeration area is longer than a predetermined fifth duration, or a duration that the temperature detected by the compartment sensor is lower than the temperature at the stop point corresponding to the refrigeration area is longer than a predetermined sixth duration. The reset control unit 503 is also capable of controlling the electric changeover valve to reset when receiving a reset command. In some embodiments, the temperature at the start point and the stop point may be different according to different refrigeration areas, and the corresponding fifth time period and the sixth time period are different. In some embodiments, the parameters may be adjusted during testing, use.
The device can find abnormal refrigeration through the detection of the compartment sensor, thereby increasing a guarantee for the discovery of the abnormality and improving the reliability of the discovery and the solution of the abnormality.
In some embodiments, the reset control unit can also control the electric switching valve to reset every time the refrigeration device is powered on and started, so as to prevent the normal operation of the electric switching valve from being influenced by the overlarge load during power on under the condition of shutdown caused by power failure.
In some embodiments, the reset control unit is further capable of controlling the electric switching valve to reset after the power is turned on and every operation time reaches a preset reset time, for example, about 6 hours, and selecting the step pulse according to the refrigeration request after the reset, so that the normal operation probability of the electric switching valve is periodically improved, and the probability of the fault phenomenon is reduced.
A schematic diagram of some embodiments of the anomaly detection apparatus of the present disclosure is shown in fig. 6.
The electric switching valve control device 601 may be any of those mentioned above.
The electric switching valve abnormality elimination unit 602 is capable of eliminating a failure of the electric switching valve when the current temperature does not reach the target temperature threshold in the current specified operation state as a result of the operation of the electric switching valve control device 601, but the number of times of resetting of the electric switching valve is equal to or greater than a predetermined number of times of resetting threshold. In some embodiments, the electrical switching valve abnormality elimination unit 602 may invoke a subsequent abnormality elimination module or issue an alarm.
The abnormality detection device can timely eliminate the abnormality caused by incorrect position of the electric switching valve, avoid repeated resetting of the electric switching valve to delay abnormality examination, and improve the efficiency of abnormality treatment.
In some embodiments, as shown in the figure, the abnormality detecting means may further include a compressor abnormality detecting unit 603 capable of determining whether the compressor state is normal, and in the case where it is determined that the compressor is normal, activating the electric switching valve control means. The device can preferentially find or eliminate the compressor abnormity, and further improves the efficiency of abnormity troubleshooting and solving.
A schematic diagram of an embodiment of a control device of the refrigeration system of the present disclosure is shown in fig. 7. The refrigeration system control device may be an electric switching valve control device or an abnormality detection device.
The refrigeration system control includes a memory 701 and a processor 702. Wherein: the memory 701 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is for storing instructions in the corresponding embodiments of the electrical shift valve control method or the anomaly detection method above. Processor 702 is coupled to memory 701 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 702 is configured to execute instructions stored in the memory, and can improve the efficiency of exception handling.
In one embodiment, as also shown in fig. 8, a refrigeration system control 800 includes a memory 801 and a processor 802. The processor 802 is coupled to the memory 801 by a BUS 803. The refrigeration system control 800 may also be coupled to an external storage device 805 via a storage interface 804 to facilitate access to external data, and may also be coupled to a network or another computer system (not shown) via a network interface 806. And will not be described in detail herein.
In this embodiment, the data instructions are stored in the memory, and the processor processes the data instructions, so that the exception handling efficiency can be improved.
In another embodiment, a computer readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiment of the electrical switching valve control method or the abnormality detection method. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
A schematic diagram of some embodiments of a refrigeration appliance 90 of the present disclosure, such as a direct chill refrigerator, is shown in fig. 9.
The refrigeration areas 911-91 n may include one or more of a refrigerating chamber, a freezing chamber or a temperature-changing chamber (or a freezing chamber with a temperature-changing function). The electric changeover valve 92 can be switched over under the control of the refrigeration system control device. In some embodiments, the relationship of the electrically operated switching valve 92 to the various refrigeration zones may be as shown in fig. 1.
The refrigeration system control 93 can be any of the refrigeration system controls described above (including an electrically operated switching valve control and a refrigeration system control).
When the refrigeration state of the refrigeration area is abnormal, the refrigeration equipment tries to adjust by controlling the electric switching valve to reset, when the adjustment frequency reaches the preset reset frequency threshold value and the refrigeration state is not recovered, the abnormality caused by incorrect position of the electric switching valve is eliminated, the delay of abnormal investigation caused by repeated resetting of the electric switching valve is avoided, the efficiency of abnormal processing is improved, and the refrigeration stability is further improved.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the disclosure or equivalent substitutions for parts of the technical features may still be made; all such modifications are intended to be included within the scope of the claims of this disclosure without departing from the spirit thereof.
Claims (19)
1. An electric switching valve control method comprising:
acquiring the current temperature of a refrigeration area;
in the case where it is determined that the duration for which the current temperature has not reached the target temperature threshold value in the currently specified operating state has reached the predetermined duration threshold value,
if the reset times of the electric switching valve after the electric switching valve is switched to the current specified working state and the current temperature does not reach the target temperature threshold value are smaller than a preset reset time threshold value, controlling the electric switching valve to reset;
the resetting is that the electric switching valve is switched from the current state to the initial state and then is switched to the target state of the electric switching valve in the current specified working state.
2. The method of claim 1, further comprising:
in the event that it is determined that the duration for which the current temperature has not reached the target temperature threshold for the currently specified operating state has reached a predetermined duration threshold,
and if the resetting times of the electric switching valve are larger than or equal to the preset resetting time threshold value, keeping the current state of the electric switching valve.
3. The method of claim 1, further comprising:
and if the current specified working state of the refrigeration area is switched or the current temperature reaches the target temperature threshold value, initializing the resetting times of the electric switching valve to be 0.
4. The method of claim 1, wherein the current temperature not meeting the target temperature threshold at a current specified operating state comprises at least one of:
under the condition that the current specified working state comprises a refrigeration demand, the current temperature is higher than the target temperature first threshold value under the current specified working state; or
And under the condition that the current specified working state comprises no refrigeration demand, the current temperature is lower than the target temperature second threshold value in the current specified working state.
5. The method of claim 1, wherein in the event that it is determined that the duration of the current temperature not reaching the target temperature threshold in the current specified operating state reaches a predetermined duration threshold, controlling the electrically operated switching valve to reset if the number of resets of the electrically operated switching valve after the current temperature not reaching the target temperature threshold is less than a predetermined number of resets threshold comprises:
acquiring the target temperature threshold according to the current specified working state;
judging whether the current temperature reaches the target temperature threshold value;
if the current temperature does not reach the target temperature threshold value, starting timing;
if the current temperature does not reach the target temperature threshold when the timing reaches the preset time threshold, judging that the reset times are smaller than a preset reset time threshold;
if the resetting frequency is less than the preset resetting frequency threshold value, controlling the electric switching valve to reset, adding 1 to the resetting frequency of the electric switching valve, and controlling the timer to count again; otherwise, the current state of the electric switching valve is kept.
6. The method of claim 1, wherein,
in the case that the refrigeration area is a refrigerating chamber, the determining that the duration of the current temperature not reaching the target temperature threshold in the current specified working state reaches a predetermined duration threshold includes one or more of:
if the refrigeration requirement exists currently, judging whether the detection temperature of the evaporation sensor is higher than a refrigeration target temperature threshold value; if the detection temperature of the evaporation sensor is higher than the refrigeration target temperature threshold value, timing is started; if the detection temperature of the evaporation sensor is continuously higher than the refrigeration target temperature threshold value within a preset first time period, determining that the duration time when the current temperature does not reach the target temperature threshold value in the current specified working state reaches a preset time period threshold value; or
If the refrigeration requirement does not exist at present, judging whether the detection temperature of the evaporation sensor is lower than a refrigeration target temperature threshold value or not; if the detection temperature of the evaporation sensor is lower than the refrigeration target temperature threshold value, timing is started; and if the detection temperature of the evaporation sensor is continuously lower than the refrigeration target temperature threshold value within the preset second time, determining that the duration time when the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset time threshold value.
7. The method of claim 1, wherein,
in the case that the refrigeration area is a freezing chamber, the determining that the duration that the current temperature does not reach the target temperature threshold in the current specified operating state reaches the predetermined duration threshold includes one or more of:
if the temperature is in the temperature-changing refrigeration working state, judging whether the temperature detected by the freezing sensor is higher than the temperature-changing target temperature threshold of the freezing chamber; if the detection temperature of the freezing sensor is higher than the temperature-changing target temperature threshold value of the freezing chamber, timing is started; if the temperature detected by the freezing sensor is continuously higher than the target temperature threshold of the variable temperature of the freezing chamber within a preset third time period, determining that the duration time when the current temperature does not reach the target temperature threshold in the current specified working state reaches a preset time period threshold; or
If the current working state of refrigeration is in a refrigeration working state, judging whether the detection temperature of the refrigeration sensor is higher than a refrigeration target temperature threshold value; if the detection temperature of the freezing sensor is higher than the freezing target temperature threshold value, timing is started; and if the detection temperature of the freezing sensor is continuously higher than the freezing target temperature threshold within the preset fourth time, determining that the duration time when the current temperature does not reach the target temperature threshold in the current specified working state reaches a preset time threshold.
8. The method of claim 1, wherein, in the event that the refrigeration area is a temperature-changing compartment, the determining that the duration for which the current temperature does not reach the target temperature threshold at the current specified operating condition reaches a predetermined duration threshold comprises:
if the temperature sensor is in the working state, judging whether the detection temperature of the freezing sensor is higher than the target temperature threshold of the temperature-changing chamber; if the detection temperature of the freezing sensor is higher than the target temperature threshold of the temperature-changing chamber, timing is started; and if the temperature detected by the freezing sensor is continuously higher than the target temperature threshold of the variable temperature chamber within the preset fifth time, determining that the duration time when the current temperature does not reach the target temperature threshold in the current specified working state reaches the preset time threshold.
9. The method of any of claims 1-8, further comprising at least one of:
acquiring the detection temperature of a compartment sensor in a refrigeration area; when the time length that the temperature detected by the compartment sensor is higher than the temperature of the starting point corresponding to the refrigeration area is longer than a preset fifth time length, or the time length that the temperature detected by the compartment sensor is lower than the temperature of the stopping point corresponding to the refrigeration area is longer than a preset sixth time length, controlling the electric switching valve to reset;
after power-on, controlling the electric switching valve to reset; or
And after the power is on, controlling the electric switching valve to reset when the running time reaches a preset reset time.
10. An anomaly detection method comprising:
the electric switching valve control method according to any one of claims 1 to 9; and
and if the current temperature does not reach the target temperature threshold value in the current specified working state and the resetting times of the electric switching valve are more than or equal to the preset resetting time threshold value, the fault of the electric switching valve is eliminated.
11. The method of claim 10, further comprising:
determining whether a compressor state is normal;
the method of any one of claims 1 to 9 is performed in a case where the compressor is normal.
12. An electric switching valve control apparatus comprising:
a temperature acquisition unit configured to acquire a current temperature of the refrigeration area;
the temperature comparison unit is configured to activate the reset control unit under the condition that the duration time that the current temperature does not reach the target temperature threshold value in the current specified working state reaches the preset time threshold value;
the reset control unit is configured to control the electric switching valve to reset if the reset times of the electric switching valve after the electric switching valve is switched to the current specified working state and the current temperature does not reach the target temperature threshold value are less than a preset reset time threshold value after the electric switching valve is activated by the temperature comparison unit;
the resetting is that the electric switching valve is switched from the current state to the initial state and then is switched to the target state of the electric switching valve in the current specified working state.
13. The apparatus of claim 12, wherein,
the temperature acquisition unit is further configured to acquire a compartment sensor detection temperature of the refrigeration area;
the temperature comparison unit is further configured to send a reset instruction to the reset control unit when the duration that the temperature detected by the compartment sensor is higher than the temperature of the starting point corresponding to the refrigeration area is longer than a predetermined fifth duration, or the duration that the temperature detected by the compartment sensor is lower than the temperature of the stopping point corresponding to the refrigeration area is longer than a predetermined sixth duration;
the reset control unit is also configured to control the electric changeover valve to reset when receiving a reset instruction.
14. The apparatus of claim 12, wherein the reset control unit is further configured to perform at least one of:
after power-on, controlling the electric switching valve to reset; or
And controlling the electric switching valve to reset under the condition that the power-on operation time length reaches the preset reset time length.
15. An abnormality detection device comprising:
the electric switching valve control apparatus according to any one of claims 12 to 14; and
and an electric switching valve abnormality elimination unit configured to eliminate the failure of the electric switching valve in the case where the current temperature does not reach the target temperature threshold in the currently specified operating state and the number of times of resetting of the electric switching valve is equal to or greater than a predetermined number of times of resetting threshold.
16. The apparatus of claim 15, further comprising:
and a compressor abnormality detection unit configured to determine whether a compressor state is normal, and activate the electric switching valve control device in case that it is determined that the compressor is normal.
17. A refrigeration system control apparatus comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-11 based on instructions stored in the memory.
18. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 11.
19. A refrigeration appliance comprising:
the refrigerant system control as set forth in claim 17;
an electrically-operated switching valve configured to switch states under control of the refrigeration system control device; and
one or more refrigerated areas configured to provide space for storing items.
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