CN110345705B - Optimal control method and device for temperature control valve of refrigeration system and refrigeration system - Google Patents
Optimal control method and device for temperature control valve of refrigeration system and refrigeration system Download PDFInfo
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- CN110345705B CN110345705B CN201810288045.1A CN201810288045A CN110345705B CN 110345705 B CN110345705 B CN 110345705B CN 201810288045 A CN201810288045 A CN 201810288045A CN 110345705 B CN110345705 B CN 110345705B
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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
- F25D29/003—Arrangement or mounting of control or safety devices for movable 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
- F25D2600/06—Controlling according to a predetermined profile
Abstract
The invention relates to the field of refrigeration system control, and discloses an optimal control method and device for a temperature control valve of a refrigeration system and the refrigeration system, wherein the control method comprises the following steps: collecting an actual temperature of the refrigerated space after the refrigeration system is operated; and controlling the thermostatic valve to reset if the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds a first preset time; and when the difference between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds a second preset time. The invention can intelligently control the temperature control valve to reset, thereby solving the problem that the temperature control valve is in one state for a long time due to various abnormal reasons, and the passage of a refrigeration system cannot be switched, so that the temperature of a refrigeration space is too low or too high.
Description
Technical Field
The invention relates to the field of refrigeration system control, in particular to an optimal control method and device for a temperature control valve of a refrigeration system and the refrigeration system.
Background
The control of the temperature control valve in the existing refrigerator products is generally reset at a fixed time, for example, the temperature control valve is reset 1 time every 24 hours, and the operation is continued according to the cycle. If the temperature control valve is in fault or in abnormal state, the fixed reset time of the temperature control valve is not reached, and the temperature control valve cannot be controlled to reset. In such a situation, it often happens that the refrigerating system passage of the refrigerator is always in a state due to the switching failure of the temperature control valve, that is, the refrigerating operation is continuously performed, so that the temperature of the refrigerator compartment is too low, or the refrigerating operation is not continuously performed, so that the temperature of the refrigerator compartment is too high. The situation that the temperature in the refrigerator is too high or too low cannot meet the requirement of a user on stable refrigeration of the refrigerator, so that whether the temperature control valve needs to be reset or not is very urgently judged through intelligent control at present, and the problem that the temperature of a refrigerator compartment is influenced because the temperature control valve is in one state for a long time due to various abnormal reasons is solved.
Disclosure of Invention
The invention aims to provide an optimal control method and device for a temperature control valve of a refrigerating system and the refrigerating system, which can intelligently control the temperature control valve to reset so as to solve the problem that the temperature control valve is in one state for a long time due to various abnormal reasons and the passage of the refrigerating system cannot be switched so as to cause the temperature of a refrigerating space to be too low or too high.
In order to achieve the above object, an aspect of the present invention provides an optimal control method for a thermo-valve of a refrigeration system, the control method comprising: collecting an actual temperature of the refrigerated space after the refrigeration system is operated; and controlling the thermostatic valve to reset if the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than a first preset temperature difference and the duration time exceeds a first preset time; and when the difference between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to a second preset temperature difference and the duration time exceeds a second preset time.
Optionally, the controlling the reset of the thermostatic valve includes: judging whether the time elapsed since the temperature control valve is reset last time is greater than a third preset time or not; and controlling the temperature control valve to reset if the time elapsed since the temperature control valve was reset last time is greater than the third preset time and the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds the first preset time; and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds the second preset time.
Optionally, the third preset time comprises 30 minutes.
Optionally, the refrigerated space comprises a freezer compartment and/or a refrigerator compartment.
Accordingly, the present invention also provides an optimized control device for a thermostatic valve of a refrigeration system, the thermostatic valve being used for controlling the temperature in a refrigerated space of the refrigeration system, the control device comprising: the temperature sensor is used for collecting the actual temperature of the refrigerating space after the refrigerating system operates; and a controller for controlling the thermostatic valve to reset if the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than a first preset temperature difference and the duration time exceeds a first preset time; and when the difference between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to a second preset temperature difference and the duration time exceeds a second preset time.
Optionally, the controller is further configured to: judging whether the time elapsed since the temperature control valve is reset last time is greater than a third preset time or not; and controlling the temperature control valve to reset if the time elapsed since the temperature control valve was reset last time is greater than the third preset time and the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds the first preset time; and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds the second preset time.
Optionally, the third preset time comprises 30 minutes.
Optionally, the refrigerated space comprises a freezer compartment and/or a refrigerator compartment.
Correspondingly, the invention also provides a refrigerating system which comprises the optimized control device of the temperature control valve.
Through the technical scheme, the invention creatively judges whether the refrigerating system effectively refrigerates the refrigerating space by detecting the actual temperature of the refrigerating space and comparing the actual temperature with the starting temperature point and/or the stopping temperature point of the refrigerating space so as to deduce whether the temperature control valve is in a normal working state, if the difference value between the starting temperature point and the actual temperature is not large and/or the difference value between the actual temperature and the stopping temperature point is not small in a certain time period, the temperature control valve is controlled to reset when the temperature control valve is not in the normal working state, namely, the intelligent control temperature control valve is controlled to reset by detecting the actual temperature of the refrigerating space. The invention can solve the problem that the temperature of the refrigerating space is too low or too high because the temperature control valve is in one state for a long time and the passage of the refrigerating system cannot be switched due to various abnormal reasons.
Description of the reference numerals
1 temperature sensing device 2 controller
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a flow chart of a method for optimizing control of a thermostatic valve for a refrigeration system according to one embodiment of the present invention;
FIG. 2 is a flow chart of a method for optimizing control of a thermostatic valve for a refrigeration system according to one embodiment of the present invention; and
fig. 3 is a flowchart of an optimized control device for a thermostatic valve of a refrigeration system according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flowchart of an optimized control method for a thermostatic valve of a refrigeration system, wherein the thermostatic valve is used for controlling the temperature in a refrigeration space of the refrigeration system. As shown in fig. 1, the control method may include: collecting an actual temperature of the refrigerated space after the refrigeration system is operated; and controlling the thermostatic valve to reset if the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds a first preset time; and when the difference between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds a second preset time. The control method can judge whether the refrigerating system effectively refrigerates the refrigerating space by detecting the actual temperature of the refrigerating space and comparing the actual temperature with the starting temperature point and/or the stopping temperature point of the refrigerating space so as to deduce whether the temperature control valve is in a normal working state, if the difference value between the starting temperature point and the actual temperature is not large and/or the difference value between the actual temperature and the stopping temperature point is not small in a certain time period, the temperature control valve is controlled to reset, namely the temperature control valve is intelligently controlled to reset by detecting the actual temperature of the refrigerating space. The invention can solve the problem that the temperature of the refrigerating space is too low or too high because the temperature control valve is in one state for a long time and the passage of the refrigerating system cannot be switched due to various abnormal reasons.
The controlling the thermo valve to be reset may include: judging whether the time elapsed since the temperature control valve is reset last time is greater than a third preset time or not; and controlling the temperature control valve to reset if the time elapsed since the temperature control valve was reset last time is greater than the third preset time and the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds the first preset time; and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds the second preset time.
The first preset time and the second preset time may be the same or different. For example, the first preset time and the second preset time may include 10 minutes. That is, when the difference between the starting temperature point of the refrigerating space and the actual temperature is less than the first preset temperature difference and the duration time exceeds 10 minutes; and/or when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds 10 minutes, determining that the temperature control valve has a fault, and controlling the temperature control valve to reset at the moment. Such an arrangement can prevent the occurrence of a situation in which a failure judgment of the thermostatic valve is made wrong due to an accidental factor.
Wherein the third preset time may include 30 minutes. When the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds the first preset time; and/or controlling the temperature control valve to reset only when the time elapsed since the temperature control valve was reset last time is greater than 30 minutes or not under the condition that the difference between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds the second preset time. By setting the minimum time interval between two adjacent resets, the influence on the normal operation of the refrigeration system caused by frequent reset operation of the temperature control valve can be avoided, and the service life of the temperature control valve can be prolonged. Of course, the preset time is not limited to 30 minutes, and it is also possible to adjust the preset time according to different refrigeration systems.
Wherein the refrigerated space comprises a freezer compartment and/or a refrigerator compartment. For example, after the refrigeration system is running, the actual temperature of the refrigeration compartment may be taken and, at the point of the start-up temperature of the refrigeration compartment (e.g. 7 ℃) the difference from the actual temperature (e.g. 6 ℃) is less than the first preset temperature difference (e.g. 2 ℃) and the duration exceeds a first preset time (e.g. 10 minutes); and/or the difference between the actual temperature (such as 6 ℃) and the shutdown temperature point (such as 3 ℃) of the refrigerating chamber is larger than or equal to the second preset temperature difference (such as 2 ℃) and the duration time exceeds a second preset time (such as 10 minutes), confirming that the temperature control valve has a fault, and controlling the temperature control valve to reset. Furthermore, it is also possible to collect the actual temperature of the freezing compartment or of both the cold storage and freezing compartments. However, when the actual temperatures of the two cold storage chambers and the freezing chambers are collected at the same time, two sets of relevant parameters need to be set, namely, a first preset temperature difference, a first preset time, a second preset temperature difference, a second preset time and a third preset time.
Specifically, the process of the optimum control of the thermo-valve will now be explained taking a refrigerator as an example, as shown in fig. 2. This embodiment starts to collect the actual temperature of the cold storage compartment of the refrigerator after the refrigerator is operated.
First, it is determined whether the elapsed time since the last reset of the thermo-valve is greater than the third preset time (e.g., 30 minutes). If the elapsed time since the last reset of the thermo valve is less than or equal to 30 minutes, the collection of the actual temperature may be temporarily stopped. Otherwise, the difference δ T1 between the start-up temperature point (e.g. 7 ℃) of the refrigerated compartment and the actual temperature and/or the difference δ T2 between the actual temperature and the stop temperature point (e.g. 3 ℃) of the refrigerated space is calculated from the real-time actual temperature collected.
Then, it is determined whether the delta T1 is less than the first predetermined temperature differential T1 (e.g., 2 ℃) and has a duration exceeding the first predetermined time (e.g., 10 minutes), and/or whether the delta T2 is greater than or equal to the first predetermined temperature differential T2 (e.g., 2 ℃) and has a duration exceeding the first predetermined time (e.g., 10 minutes). If the delta T1 is less than T1 and the duration is more than 10 minutes, and/or the delta T2 is more than or equal to T2 and the duration is more than 10 minutes, confirming that the temperature control valve is in failure, and controlling the temperature control valve to reset; otherwise, confirming that the temperature control valve is normal, keeping the temperature control valve in the original position, and continuously calculating the difference value delta T1 between the starting temperature point (for example, 7 ℃) of the refrigerating chamber and the actual temperature and/or the difference value delta T2 between the actual temperature and the stopping temperature point (for example, 3 ℃) of the refrigerating space through the collected real-time actual temperature.
Further, it is also possible to determine whether or not the elapsed time since the last reset of the thermo-valve is greater than the third preset time (for example, 30 minutes) when it is determined that δ T1< T1 and the duration exceeds 10 minutes, and/or δ T2 ≧ T2 and the duration exceeds 10 minutes, i.e., when it is confirmed that the thermo-valve has failed. If the time elapsed since the last reset of the temperature control valve is more than 30 minutes, controlling the temperature control valve to reset; otherwise, the thermo valve is kept in place.
In summary, the present invention creatively determines whether the refrigeration system is performing effective refrigeration on the refrigeration space by detecting the actual temperature of the refrigeration space and comparing the actual temperature with the start-up temperature point and/or the stop temperature point of the refrigeration space, so as to infer whether the thermostatic valve is in a normal working state, and if the difference between the start-up temperature point and the actual temperature is not large and/or the difference between the actual temperature and the stop temperature point is not small within a certain time period, it indicates that the thermostatic valve is not in the normal working state, the thermostatic valve is controlled to reset, that is, the resetting of the intelligent control thermostatic valve is realized by detecting the actual temperature of the refrigeration space. The invention can solve the problem that the temperature of the refrigerating space is too low or too high because the temperature control valve is in one state for a long time and the passage of the refrigerating system cannot be switched due to various abnormal reasons.
Accordingly, the present invention also provides an optimized control device for a thermostatic valve of a refrigeration system, the thermostatic valve being used for controlling the temperature in a refrigerated space of the refrigeration system, the control device comprising: the temperature sensor 1 is used for collecting the actual temperature of the refrigerating space after the refrigerating system operates; and a controller 2 for controlling the thermostatic valve to reset if the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than a first preset temperature difference and the duration time exceeds a first preset time; and when the difference between the actual temperature and the shutdown temperature point of the refrigerated space is greater than or equal to a second preset temperature difference and the duration time exceeds a second preset time, as shown in fig. 3.
Optionally, the controller 2 is further configured to: judging whether the time elapsed since the temperature control valve is reset last time is greater than a third preset time or not; and controlling the temperature control valve to reset if the time elapsed since the temperature control valve was reset last time is greater than the third preset time and the actual temperature meets one or more of the following conditions: when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds the first preset time; and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds the second preset time.
Optionally, the control device further includes: a clock device for providing an operating time for the refrigeration system.
Optionally, the third preset time comprises 30 minutes.
Optionally, the refrigerated space comprises a freezer compartment and/or a refrigerator compartment.
For specific details and benefits of the method for optimizing and controlling a thermostatic valve for a refrigeration system according to the present invention, reference may be made to the above description of the apparatus for optimizing and controlling a thermostatic valve for a refrigeration system, and further description is omitted here.
Correspondingly, the invention also provides a refrigerating system which comprises the optimized control device of the temperature control valve.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. A method for optimal control of a thermostatic valve for a refrigeration system for controlling the temperature in a refrigerated space of said refrigeration system, characterized in that it comprises:
collecting an actual temperature of the refrigerated space after the refrigeration system is operated; and
controlling the thermostatic valve to reset if the actual temperature meets one or more of the following conditions:
when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than a first preset temperature difference and the duration time exceeds a first preset time; and
and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to a second preset temperature difference and the duration time exceeds a second preset time.
2. The method of claim 1, wherein said controlling the repositioning of the thermostatic valve comprises:
judging whether the time elapsed since the temperature control valve is reset last time is greater than a third preset time or not; and
controlling the thermostatic valve to reset if the time elapsed since the thermostatic valve was last reset is greater than the third preset time and the actual temperature meets one or more of the following conditions:
when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds the first preset time; and
and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds the second preset time.
3. The method of claim 2, wherein the third predetermined time comprises 30 minutes.
4. The method of claim 1, wherein the refrigerated space comprises a freezer compartment and/or a refrigerator compartment.
5. An optimized control device for a thermostatic valve of a refrigeration system for controlling the temperature in a refrigerated space of said refrigeration system, characterized in that it comprises:
the temperature sensor is used for collecting the actual temperature of the refrigerating space after the refrigerating system operates; and
a controller for controlling the thermostatic valve to reset if the actual temperature meets one or more of the following conditions:
when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than a first preset temperature difference and the duration time exceeds a first preset time; and
and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to a second preset temperature difference and the duration time exceeds a second preset time.
6. The optimal control device for a thermostatic valve for a refrigerant system as set forth in claim 5, wherein said controller is further configured to:
judging whether the time elapsed since the temperature control valve is reset last time is greater than a third preset time or not; and
controlling the thermostatic valve to reset if the time elapsed since the thermostatic valve was last reset is greater than the third preset time and the actual temperature meets one or more of the following conditions:
when the difference value between the starting temperature point of the refrigerating space and the actual temperature is smaller than the first preset temperature difference and the duration time exceeds the first preset time; and
and when the difference value between the actual temperature and the shutdown temperature point of the refrigerating space is greater than or equal to the second preset temperature difference and the duration time exceeds the second preset time.
7. The optimized control for a thermostatted valve for a refrigeration system as set forth in claim 6, characterized in that the third preset time comprises 30 minutes.
8. The optimized control of thermostatted valves for refrigeration systems as claimed in claim 5, characterized in that the refrigerated space comprises a freezer compartment and/or a refrigerator compartment.
9. Refrigeration system, characterized in that it comprises an optimized control of a thermostatic valve according to any of claims 5-8.
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| CN201810288045.1A CN110345705B (en) | 2018-04-03 | 2018-04-03 | Optimal control method and device for temperature control valve of refrigeration system and refrigeration system |
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| CN201810288045.1A CN110345705B (en) | 2018-04-03 | 2018-04-03 | Optimal control method and device for temperature control valve of refrigeration system and refrigeration system |
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| JP2002130902A (en) * | 2000-10-24 | 2002-05-09 | Sanden Corp | Cool storage type cold insulation cabinet |
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