CN115306691A - Compressor control method and device, medium and compressor - Google Patents

Compressor control method and device, medium and compressor Download PDF

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Publication number
CN115306691A
CN115306691A CN202210756151.4A CN202210756151A CN115306691A CN 115306691 A CN115306691 A CN 115306691A CN 202210756151 A CN202210756151 A CN 202210756151A CN 115306691 A CN115306691 A CN 115306691A
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China
Prior art keywords
compressor
temperature
exhaust temperature
normally
started
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Application number
CN202210756151.4A
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Chinese (zh)
Inventor
谢丹丹
潘献化
史运光
向奇轩
吴绍杰
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Qingdao Haier Wisdom Electrical Equipment Co ltd
Haier Smart Home Co Ltd
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Qingdao Haier Wisdom Electrical Equipment Co ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Wisdom Electrical Equipment Co ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Wisdom Electrical Equipment Co ltd
Priority to CN202210756151.4A priority Critical patent/CN115306691A/en
Publication of CN115306691A publication Critical patent/CN115306691A/en
Priority to PCT/CN2023/096965 priority patent/WO2024001638A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/10—Inlet temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/11—Outlet temperature

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Motor And Converter Starters (AREA)

Abstract

The application relates to the technical field of smart home, and particularly provides a compressor control method, a compressor control device, a compressor control medium and a compressor, aiming at solving the technical problems of high compressor shutdown detection cost and low accuracy. The method comprises the following steps: after a starting signal is received, controlling the compressor to be started, and acquiring the initial exhaust temperature when the compressor is started; obtaining a first discharge temperature of the compressor after a first period of time when the compressor is on; judging whether the compressor is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature; if so, acquiring a second exhaust temperature and a first suction temperature of the compressor, and determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature; if not, stopping supplying power to the compressor, and outputting prompt information of abnormal starting of the compressor. The method can improve the accuracy of the compressor shutdown detection on the basis of not increasing the cost.

Description

Compressor control method and device, medium and compressor
Technical Field
The application relates to the technical field of smart home, in particular to a compressor control method, device, medium and compressor.
Background
The water heater is a common water heating device in daily life, and with the improvement of living standard, people have higher and higher requirements on the water heater, and various water heaters are generated at the same time, such as heat pump water heaters mainly comprising space energy water heaters and air energy water heaters.
The heat pump water heater mainly comprises an evaporator, a compressor, a condenser, an expansion valve, a water storage tank and other structures, can absorb heat energy in the sun and/or air, and utilizes a small amount of electric energy to heat water in the water storage tank. The compressor of the heat pump water heater may be shut down due to various reasons during the operation process, and in order to avoid potential safety hazards, the power supply of the compressor also needs to be synchronously turned off when the compressor is shut down, so as to perform shutdown protection. In the prior art, whether the compressor is stopped or not is generally judged by detecting the current of the compressor. If the controller of the compressor detects that the current of the compressor exceeds the current threshold value, namely overcurrent occurs, the compressor can be judged to be stopped, and therefore power supply for the compressor is stopped. However, the method of determining whether the compressor is stopped by detecting the current requires an additional current detecting device, which increases the production cost of the compressor. In addition, the compressor is not stopped to cause an overcurrent, and the result of judging whether the compressor is stopped by detecting the current is not accurate.
Therefore, there is a need for a compressor control scheme that does not increase cost and that is accurate in compressor shutdown detection.
Disclosure of Invention
In order to overcome the defects, the application is provided to provide a compressor control method, a device, a medium and a compressor, which solve or at least partially solve the technical problems of inaccurate shutdown detection and high cost of the existing compressor.
In a first aspect, a method for controlling a compressor applied to a water heater is provided, the method including:
after a starting signal is received, controlling the compressor to be started, and acquiring the initial exhaust temperature when the compressor is started;
obtaining a first discharge temperature of the compressor after a first period of time when the compressor is on;
judging whether the compressor is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature;
if so, acquiring a second exhaust temperature and a first suction temperature of the compressor, and determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature;
if not, stopping supplying power to the compressor, and outputting prompt information of abnormal starting of the compressor.
In one technical solution of the above method for controlling a compressor, the determining whether the compressor is normally started according to the difference between the first exhaust temperature and the initial exhaust temperature specifically includes:
judging whether the difference value between the first exhaust temperature and the initial exhaust temperature is smaller than a first threshold value or not, and continuing for a second time period;
if so, acquiring the current water temperature of the water in the water heater, and judging whether the compressor is normally started or not according to the current water temperature;
if not, the compressor is normally started.
In one technical solution of the above method for controlling a compressor, the determining whether the compressor is normally started according to the current water temperature specifically includes:
judging whether the first exhaust temperature is less than or equal to a temperature threshold value, and continuing for a third time, wherein the temperature threshold value is the sum of the current water temperature and a first temperature difference threshold value;
if yes, the compressor is not normally started;
if not, the compressor is normally started.
In one embodiment of the above compressor control method, the method further includes: acquiring initial suction temperature when the compressor is started;
determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature, specifically including:
determining a first difference between the initial exhaust temperature and the second exhaust temperature;
determining a second difference between the first inspiratory temperature and the initial inspiratory temperature;
and determining whether the compressor normally operates according to the first difference value and the second difference value.
In one technical solution of the above method for controlling a compressor, the determining whether the compressor normally operates according to the first difference and the second difference specifically includes:
judging whether the first difference is greater than or equal to a second temperature difference threshold value or not, the second difference is greater than or equal to a third temperature difference threshold value, and the time duration lasts for a fourth time period;
if so, the compressor does not normally operate.
In one embodiment of the above compressor control method, after the compressor does not operate normally, the method further includes:
and stopping supplying power to the compressor and outputting prompt information of abnormal operation of the compressor.
In one embodiment of the above compressor control method, the obtaining a second discharge temperature and a first suction temperature of the compressor specifically includes:
and acquiring a second exhaust temperature and a first suction temperature of the compressor after judging that the compressor is normally started for a fifth time period.
In a second aspect, there is provided a compressor control apparatus comprising:
the temperature acquisition module is used for controlling the compressor to be started after receiving a starting signal and acquiring the initial exhaust temperature when the compressor is started; obtaining a first discharge temperature of the compressor after a first period of time that the compressor is on;
the starting judging module is used for judging whether the compressor is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature;
the operation judgment module is used for acquiring a second exhaust temperature and a first suction temperature of the compressor when the compressor is normally started, and determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature;
and the abnormity prompting module is used for stopping supplying power to the compressor when the compressor is not normally started and outputting prompt information of abnormal starting of the compressor.
In a third aspect, a compressor is provided, comprising a processor, and a memory communicatively coupled to the processor;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored in the memory to implement the method of any of the above aspects.
In a fourth aspect, a computer-readable storage medium is provided, in which computer-executable instructions are stored, and when executed by a processor, the computer-executable instructions are used to implement the method according to any one of the above technical solutions.
One or more technical solutions described above in the present application have at least one or more of the following beneficial effects:
according to the method, after the starting signal is received, the compressor is controlled to be started, and the initial exhaust temperature of the compressor when the compressor is started is obtained; obtaining a first discharge temperature of the compressor after a first period of time when the compressor is on; judging whether the compressor is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature; if so, acquiring a second exhaust temperature and a first air suction temperature of the compressor, and determining whether the compressor normally operates according to the second exhaust temperature and the first air suction temperature; if not, stopping supplying power to the compressor, and outputting prompt information of abnormal starting of the compressor. According to the method, firstly, after the compressor is started, whether the compressor is normally started or not can be determined according to the change of the exhaust temperature of the compressor, and if the compressor is not normally started, the compressor is stopped at the moment. Through the arrangement, whether the compressor is stopped due to accidents or not during starting can be detected, and the accuracy of stop detection in the starting process of the compressor is improved on the premise of not increasing the cost of the compressor. Secondly, if the compressor is judged to be normally started, whether the compressor normally operates can be judged according to the exhaust temperature and the suction temperature after the compressor is normally started, and if the compressor does not normally operate, the compressor is possibly stopped. Through the arrangement, whether the compressor is stopped due to accidents or faults in the operation process can be detected, and the accuracy of stop detection in the operation process of the compressor is improved on the premise of not increasing the cost of the compressor. In conclusion, based on the above arrangement, the accuracy and comprehensiveness of compressor shutdown detection can be improved, and the detection means is simple and convenient; in addition, the suction temperature and the exhaust temperature are parameters required to be detected when the compressor runs, and the detection means does not increase the cost of the compressor.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic diagram of a prior art heat pump water heater;
FIG. 2 is a system architecture diagram of an embodiment of the present application;
FIG. 3 is a flow chart of a compressor control method provided by an embodiment of the present application;
FIG. 4 is a flow chart of a compressor control method provided by another embodiment of the present application;
fig. 5 is a schematic structural diagram of a compressor control device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a compressor according to an embodiment of the present application.
List of reference numerals:
1. an evaporator; 2. a compressor; 21. a compressor discharge port; 22. a compressor air suction port; 3. a condenser; 4. an expansion valve; 5. a water storage tank; 6. a four-way valve; 7. a compressor control device; 8. a temperature sensor; 51. a temperature acquisition module; 52. starting a judging module; 53. an operation judgment module; 54. and an exception prompt module.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
Fig. 1 is a schematic structural diagram of a heat pump water heater in the prior art, and as shown in fig. 1, the heat pump water heater mainly includes an evaporator 1, a compressor 2, a condenser 3, an expansion valve 4, a water storage tank 5, a four-way valve 6, and the like. When the heat pump water heater operates, the heat pump water heater can absorb heat energy in the sun and/or air and utilize a small amount of electric energy to heat water in the water storage tank. Specifically, the evaporator 1 can absorb heat in the sun and/or air to change a low-temperature low-pressure liquid refrigerant into a low-temperature low-pressure gaseous refrigerant, the compressor 2 applies work to change the low-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, and the high-temperature high-pressure gaseous refrigerant releases heat in the condenser 3 (the micro-channel heat exchanger attached to the outer wall of the liner of the water storage tank 5) to heat water in the liner of the water storage tank 5, then the low-temperature low-pressure liquid refrigerant is changed into a low-temperature low-pressure liquid refrigerant after passing through the expansion valve 4, and the circulation is repeated in this way to heat water in the water storage tank 5 to a target temperature. The four-way valve 6 has a reversing function and is used for switching two opposite processes of heating and defrosting.
The function of the compressor is of vital importance during the operation of the heat pump water heater. However, the compressor may be shut down due to various accidents or faults during operation, and in order to avoid potential safety hazards, the power supply of the compressor needs to be synchronously turned off when the shutdown occurs, so as to perform shutdown protection. In the prior art, whether the compressor is stopped or not is generally judged by detecting the current of the compressor. If the controller of the compressor detects that the current of the compressor exceeds the current threshold value, namely overcurrent occurs, the compressor can be judged to be stopped, and power supply to the compressor is stopped.
However, the method of determining whether the compressor is stopped by detecting the current requires a current detection device to be added to the compressor, which increases the production cost of the compressor. In addition, the reactions after the compressor is stopped are different, which may not cause overcurrent, and the result of determining whether the compressor is stopped by detecting the current is not accurate.
The present application provides a compressor control method, which aims to solve the above technical problems in the prior art. According to the method, firstly, after the compressor is started, whether the compressor is normally started or not can be determined according to the change of the exhaust temperature of the compressor, and if the compressor is not normally started, the compressor is stopped at the moment. Through the arrangement, whether the compressor is stopped due to accidents or not during starting can be detected, and the accuracy of stop detection in the starting process of the compressor is improved on the premise of not increasing the cost of the compressor. Secondly, if the compressor is judged to be normally started, whether the compressor normally operates can be judged according to the exhaust temperature and the suction temperature after the compressor is normally started, and if the compressor does not normally operate, the compressor is possibly stopped. Through the arrangement, whether the compressor is stopped due to accidents or faults in the operation process can be detected, and the accuracy of stop detection in the operation process of the compressor is improved on the premise of not increasing the cost of the compressor. In conclusion, based on the above arrangement, the accuracy and comprehensiveness of the compressor shutdown detection can be improved, and the detection means is simple and convenient; in addition, the suction temperature and the exhaust temperature are parameters required to be detected when the compressor runs, and the detection means does not increase the cost of the compressor.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 2 is a system architecture diagram according to an embodiment of the present application, and as shown in fig. 2, 2 is a compressor, 21 is a compressor exhaust port, 22 is a compressor suction port, 5 is a water storage tank, 7 is a compressor control device, and 8 is a temperature sensor. The compressor control device 7, after receiving the start signal, controls the compressor 2 to start, and obtains an initial discharge temperature when the compressor 2 is started by using the temperature sensor 8 disposed at the compressor discharge port 21, and obtains an initial suction temperature when the compressor 2 is started by using the temperature sensor 8 disposed at the compressor suction port 22. After a first period of time when the compressor 2 is on, a first discharge temperature of the compressor 2 is acquired, and a current water temperature is acquired using a temperature sensor 8 provided in the storage tank 5. And then, judging whether the compressor 2 is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature and the current water temperature. And if the compressor 2 is not normally started, stopping supplying power to the compressor 2 and outputting prompt information of abnormal starting of the compressor. And if the compressor 2 is normally started, acquiring a second exhaust temperature and a first suction temperature of the compressor, and determining whether the compressor normally operates according to the second exhaust temperature, the first suction temperature, the initial exhaust temperature and the initial suction temperature. And if the compressor 2 does not normally operate, stopping supplying power to the compressor 2 and outputting prompt information of abnormal operation of the compressor.
Example one
Fig. 3 is a flowchart of a compressor control method according to an embodiment of the present application, where an execution subject of the compressor control method according to the embodiment of the present application may be a compressor or a compressor control device, and the compressor control method is described with the execution subject as the compressor control device in the present embodiment. The compressor provided by the embodiment can be applied to a water heater, and as shown in fig. 3, the compressor control method can include the following steps:
step S101: and after the starting signal is received, controlling the compressor to be started, and acquiring the initial exhaust temperature when the compressor is started.
In this embodiment, the water heater sends a start signal to the compressor control device after receiving a heating instruction input by a user, and the compressor control device starts the compressor after receiving the start signal.
In this embodiment, the discharge temperature of the compressor may be obtained by a temperature sensor provided at the discharge port of the compressor.
In this embodiment, if the compressor is normally turned on, after the compressor is normally turned on for a period of time, the discharge temperature will be increased and the suction temperature will be decreased compared to the time of turning on. If the compressor is not normally started, the exhaust temperature and the suction temperature are unchanged after the compressor is started for a period of time compared with the starting time. The air suction temperature is the temperature of air sucked by the compressor, and the air discharge temperature is the temperature of air shot by the compressor after the compressor is pushed to do work.
When the compressor is just started, the suction temperature cannot change greatly in a short time, and the reaction is insensitive; the sucked air needs to push the compressor to work, so that the generated heat can cause the exhaust temperature to generate detectable temperature change in a short time, and the reaction is sensitive. Therefore, whether the compressor is normally started or not is judged by detecting the change of the exhaust temperature, and the accuracy of the compressor stop detection can be improved.
Step S102: after a first period of time when the compressor is on, a first discharge temperature of the compressor is obtained.
In this embodiment, the first time duration may be set as a time duration during which the temperature change of the exhaust gas can be detected, and a specific value may be flexibly set by those skilled in the art according to practical applications, which is not limited herein.
Step S103: and judging whether the compressor is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature.
In this embodiment, if the compressor is normally turned on, the exhaust temperature will rise after a period of time; if the compressor is not normally started, the exhaust temperature basically does not change after a period of time, and therefore whether the compressor is normally started or not can be judged through the difference value between the first exhaust temperature and the initial exhaust temperature.
In one embodiment, the step S103 of determining whether the compressor is normally started according to the difference between the first discharge temperature and the initial discharge temperature may include: judging whether the difference value between the first exhaust temperature and the initial exhaust temperature is smaller than a first threshold value or not, and continuing for a second time period; if so, acquiring the current water temperature of the water in the water heater, and judging whether the compressor is normally started or not according to the current water temperature; if not, the compressor is normally started.
In the present embodiment, when determining whether the compressor is normally turned on, it is necessary to determine whether the difference between the first discharge temperature and the initial discharge temperature is less than the first threshold value and continues for the second period of time, in order to determine that the occurrence of the difference is not an emergency caused by an accidental factor but an event that can stably occur for a period of time. The specific value of the second duration can be flexibly set by those skilled in the art, and is not limited herein.
In this embodiment, the current water temperature may be obtained by a temperature sensor provided in a water storage tank of the water heater.
In the present embodiment, if the difference between the first discharge temperature and the initial discharge temperature is less than the first threshold value and continues for the second period of time, which indicates that the change value of the discharge temperature after the compressor is turned on for a period of time is small, it may be preliminarily considered that the compressor is not turned on. However, the small variation in the discharge temperature may be caused by the entry of cold water. Therefore, in order to improve the accuracy of judgment and avoid misjudgment, whether the change value of the exhaust temperature is caused by the fact that the compressor is not started can be further judged according to the current water temperature of the water in the water heater. Through such setting, can further improve the accuracy that whether the compressor normally opened the detection to the accuracy that the compressor shut down detected when improving the start-up.
In one embodiment, the determining whether the compressor is normally started according to the current water temperature may include: judging whether the first exhaust temperature is less than or equal to a temperature threshold value or not, and continuing for a third time, wherein the temperature threshold value is the sum of the current water temperature and the first temperature difference threshold value; if yes, the compressor is not normally started; if not, the compressor is normally started.
In the present embodiment, when determining whether the compressor is normally turned on according to the current water temperature, it is necessary to determine whether the first exhaust temperature is less than or equal to the temperature threshold value, and the determination is continued for a third period of time, in order to determine that the occurrence of the first exhaust temperature is not an emergency event caused by an accidental factor, but an event that can stably occur within a period of time. The specific value of the third duration can be flexibly set by those skilled in the art, and is not limited herein. The third time period may be the same as the second time period or may be different from the second time period. In addition, the specific value of the first temperature difference threshold can be flexibly set by those skilled in the art according to practical application, and is not limited herein.
In the embodiment, whether the compressor is normally started or not is judged according to the current water temperature, so as to eliminate the condition that the change value of the exhaust temperature is small due to the entry of cold water. If the variation value of the exhaust temperature is caused by the entry of cold water, the first exhaust temperature is necessarily greater than the current temperature of the water in the water heater. In addition, in order to avoid misjudgment caused by accidental factors, a temperature difference threshold value can be added to the current water temperature, namely only when the first exhaust temperature is greater than the sum of the current water temperature and the first temperature difference threshold value, the fact that the change value of the exhaust temperature is caused by cold water entering is indicated, and the compressor is normally started. If the first exhaust temperature is less than or equal to the temperature threshold value and lasts for the third time period, the change value of the exhaust temperature is not caused by cold water entering but is caused by the abnormal starting of the compressor.
In the embodiment, by judging the sum of the first exhaust temperature, the current water temperature and the first temperature difference threshold value, the situations that the change value of the exhaust temperature is small due to the entering of cold water and the like are eliminated, the accuracy of judging whether the compressor is normally started or not through the change value of the exhaust temperature can be further improved, the misjudgment caused by the situations that the cold water enters and the like is avoided, and the accuracy of detecting whether the compressor is normally started or not is further improved.
Step S104: and if so, acquiring a second exhaust temperature and a first air suction temperature of the compressor, and determining whether the compressor normally operates according to the second exhaust temperature and the first air suction temperature.
In this embodiment, if it is detected that the compressor is normally started, it is further required to detect whether the compressor normally operates, so as to detect whether the compressor is stopped during the operation process.
In this embodiment, please refer to the second embodiment in detail for the specific implementation manner of determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature in step S104.
In this embodiment, the temperature of the intake air of the compressor may be acquired by a temperature sensor provided at the intake air of the compressor.
In one embodiment, the obtaining the second discharge temperature and the first suction temperature of the compressor in step S104 may include: and acquiring a second exhaust temperature and a first suction temperature of the compressor after judging that the compressor is normally started for a fifth time period.
In the present embodiment, the fifth period may be a period from the start of the compressor to the time of entering the steady-state operation. The specific value of the fifth time period can be flexibly set by those skilled in the art, and is not limited in any way herein.
In this embodiment, after the compressor is started, it takes a period of time to enter the steady-state operation, and the state of the compressor is stable at this time, so that the operating state of the compressor can be determined according to various operating parameters of the compressor. Therefore, in order to improve the accuracy of determining whether the compressor is normally operated according to the second discharge temperature and the first suction temperature, the second discharge temperature and the first suction temperature of the compressor may be acquired after the fifth period of time in which the compressor is normally turned on is determined.
Step S105: if not, stopping supplying power to the compressor, and outputting prompt information of abnormal starting of the compressor.
In this embodiment, if the compressor is not normally started, which indicates that the compressor has been stopped, the power supply to the compressor is stopped, so as to avoid the occurrence of potential safety hazard. In addition, the method can also output prompt information of abnormal starting of the compressor to prompt a user that the compressor is stopped due to abnormal starting, and the user needs to check and take corresponding measures in time.
In this embodiment, the suction temperature and the discharge temperature of the compressor are the operation parameters that the compressor should detect originally, and the implementation of steps S101-S105 does not add cost to the compressor.
In the embodiment of the present application, first, after the compressor is started, whether the compressor is normally started may be determined according to a change of a discharge temperature of the compressor, and if the compressor is not normally started, it is determined that the compressor is stopped at this time. Through the arrangement, whether the compressor is stopped due to accidents or not during starting can be detected, and the accuracy of stop detection in the starting process of the compressor is improved on the premise of not increasing the cost of the compressor. Secondly, if the compressor is judged to be normally started, whether the compressor normally operates can be judged according to the exhaust temperature and the suction temperature after the compressor is normally started, and if the compressor does not normally operate, the compressor is possibly stopped. Through the arrangement, whether the compressor is stopped due to accidents or faults in the operation process can be detected, and the accuracy of stop detection in the operation process of the compressor is improved on the premise of not increasing the cost of the compressor. In conclusion, based on the above arrangement, the accuracy and comprehensiveness of the compressor shutdown detection can be improved, and the detection means is simple and convenient; in addition, the suction temperature and the exhaust temperature are parameters required to be detected when the compressor runs, and the detection means does not increase the cost of the compressor.
Example two
Fig. 4 is a flowchart of a compressor control method according to an embodiment of the present application, where an execution subject of the compressor control method according to the embodiment of the present application may be a compressor or a compressor control device, and the compressor control method is described with the execution subject as the compressor control device in the present embodiment. The compressor provided by the embodiment can be applied to a water heater, and as shown in fig. 4, the compressor control method can include the following steps:
step S201: a first difference between the initial exhaust temperature and the second exhaust temperature is determined.
In this embodiment, the first difference between the initial discharge temperature and the second discharge temperature refers to a difference between the discharge temperature when the compressor is started and the discharge temperature after the compressor is normally started and operated.
Step S202: an initial suction temperature at which the compressor is turned on is obtained and a second difference between the first suction temperature and the initial suction temperature is determined.
In this embodiment, in order to improve the accuracy of determining whether the compressor is normally operated, the initial suction temperature may be obtained simultaneously with the initial discharge temperature in the first embodiment.
In this embodiment, the second difference between the first suction temperature and the initial suction temperature refers to a difference between the suction temperature after the compressor is normally started and operated and the suction temperature when the compressor is started.
Step S203: and determining whether the compressor normally operates according to the first difference value and the second difference value.
In this embodiment, after the fifth time period during which the compressor is normally turned on is determined, the second discharge temperature and the first suction temperature of the compressor may be obtained in real time, and the steps S201 to S203 may be continuously performed according to the obtained temperature in real time.
In one embodiment, the step S203 of determining whether the compressor normally operates according to the first difference and the second difference may include: judging whether the first difference value is greater than or equal to a second temperature difference threshold value and the second difference value is greater than or equal to a third temperature difference threshold value and lasting for a fourth time length; if so, the compressor does not normally operate.
In this embodiment, if the compressor is operating normally, after the compressor has been operating for a period of time, the discharge temperature will increase and the suction temperature will decrease compared to when it is on. If the compressor is not operating properly, the discharge temperature will decrease and the suction temperature will increase, as opposed to normal operation. Therefore, it is possible to determine whether the compressor is normally operated by detecting whether the discharge temperature is decreased and the suction temperature is increased.
In the present embodiment, it is determined whether the compressor is operating normally, and it is necessary to determine whether the first difference is greater than or equal to the second temperature difference threshold and the second difference is greater than or equal to the third temperature difference threshold, and continue for a fourth period of time. This is to determine that the occurrence of the first difference and the second difference is not an emergency event caused by a chance factor but an event that can stably occur for a period of time. The specific value of the fourth time period can be flexibly set by those skilled in the art, and is not limited in any way herein.
In this embodiment, the specific value of the second temperature difference threshold may be flexibly set by those skilled in the art according to practical applications, and is not limited herein. Similarly, the specific value of the third temperature difference threshold can be flexibly set by those skilled in the art according to practical application, and is not limited herein. The second temperature difference threshold may be the same as or different from the third temperature difference threshold.
In this embodiment, if the first difference is greater than or equal to the second temperature difference threshold, and the second difference is greater than or equal to the third temperature difference threshold, and continues for a fourth period of time, an abnormal operation of the compressor may be declared. Through the arrangement, the accuracy of determining whether the compressor normally operates can be improved on the premise of not increasing the cost, misjudgment caused by accidental factors is avoided, and therefore the accuracy of compressor stop detection during operation is improved.
In one embodiment, after the compressor does not normally operate, the method may further include: and stopping supplying power to the compressor and outputting prompt information of abnormal operation of the compressor.
In the embodiment, if the compressor does not normally operate, which indicates that the compressor is shut down due to an accident or a fault, the power supply to the compressor is stopped to avoid potential safety hazard. In addition, the abnormal operation prompt information of the compressor can be output to prompt a user that the compressor is stopped due to abnormal operation at present and needs to be checked in time and take corresponding measures. Through such setting, can avoid the compressor to shut down the potential safety hazard that leads to in time indicate the user, promote the user and use experience.
In the embodiment of the present application, if the compressor is normally operated, the discharge temperature is increased and the suction temperature is decreased after the compressor is operated for a certain period of time, compared to the time when the compressor is turned on. If the compressor is not operating properly, the discharge temperature will decrease and the suction temperature will increase, as opposed to normal operation. Therefore, whether the compressor normally operates can be determined by detecting the exhaust temperature change value and the suction temperature change value after the compressor operates for a period of time, so that the accuracy of the stop detection of the compressor during operation is improved, and the detection means is simple and convenient. In addition, since the suction temperature and the discharge temperature are parameters that need to be detected when the compressor is operated, the discharge temperature variation value and the suction temperature variation value to determine whether the compressor is normally operated do not increase the cost of the compressor.
The compressor control method of the present application is explained below with a specific embodiment.
EXAMPLE III
In a specific embodiment, a user turns on a domestic space energy water heater to heat water, the space energy water heater sends a starting signal to a compressor control device therein after receiving a heating instruction, the compressor control device controls a compressor to be started after receiving the starting signal, and the shutdown protection is started in a full-range mode, and a specific compressor control process is as follows:
in the first step, the compressor control device controls the compressor to be started after receiving the starting signal, and obtains an initial exhaust temperature Tp0 and an initial suction temperature Tx0 when the compressor is started.
In the second step, the compressor control device obtains the first discharge temperature Tp1 of the compressor after the first period of time that the compressor is on.
Thirdly, the compressor control device judges that the difference value between the first exhaust temperature Tp1 and the initial exhaust temperature Tp0 is larger than a first threshold value, and the first exhaust temperature Tp1 is larger than the current water temperature of water in the water heater, and then the compressor is normally started.
Fourthly, the compressor control device acquires a second discharge temperature Tp2 and a first suction temperature Tx1 of the compressor after 5min of judging that the compressor is normally opened, and determines that after 15min of normally opening, a first difference value between the initial discharge temperature Tp0 and the second discharge temperature Tp2 is greater than a second temperature difference threshold value, a second difference value between the first suction temperature Tx1 and the initial suction temperature Tx0 is greater than a third temperature difference threshold value and lasts for 30s, and the compressor does not normally operate.
And fifthly, stopping supplying power to the compressor, and outputting abnormal operation prompt information of the compressor to prompt a user that the compressor is abnormally operated, so that the water heater cannot be normally heated, and corresponding measures need to be taken in time.
Fig. 5 is a schematic structural diagram of a compressor control device according to an embodiment of the present application, and as shown in fig. 5, the compressor control device includes: a temperature acquisition module 51, a start judgment module 52, an operation judgment module 53 and an abnormality prompt module 54. The temperature acquisition module 51 is used for controlling the compressor to be started after receiving the starting signal and acquiring the initial exhaust temperature when the compressor is started; obtaining a first discharge temperature of the compressor after a first period of time when the compressor is on; the opening judgment module 52 is configured to judge whether the compressor is normally opened according to a difference between the first exhaust temperature and the initial exhaust temperature; the operation judging module 53 is configured to obtain a second exhaust temperature and a first suction temperature of the compressor when the compressor is normally started, and determine whether the compressor normally operates according to the second exhaust temperature and the first suction temperature; and the abnormal prompting module 54 is used for stopping supplying power to the compressor when the compressor is not normally started and outputting prompting information of abnormal starting of the compressor. In an embodiment, the description of the specific implementation functions of the compressor control device may refer to steps S101 to S105 in the first embodiment, which are not described herein again.
Fig. 6 is a schematic structural diagram of a compressor according to an embodiment of the present application, and as shown in fig. 6, the compressor includes: a processor 101, and a memory 102 communicatively coupled to the processor 101; the memory 102 stores computer-executable instructions; the processor 101 executes computer-executable instructions stored in the memory 102 to implement the steps of the compressor control method in the above-described method embodiments.
In the above-described compressor, the memory 102 and the processor 101 are electrically connected directly or indirectly to achieve data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines, such as may be provided via a bus. The memory 102 stores computer-executable instructions for implementing the data access control method, including at least one software functional module that can be stored in the memory 102 in the form of software or firmware, and the processor 101 executes various functional applications and data processing by running the software programs and modules stored in the memory 102.
The Memory 102 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 102 is used for storing programs, and the processor 101 executes the programs after receiving the execution instructions. Further, the software programs and modules within the memory 102 may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.
The processor 101 may be an integrated circuit chip having signal processing capabilities. The Processor 101 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are executed by a processor to implement the steps of the method embodiments of the present application.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A compressor control method, characterized in that the compressor is applied to a water heater, the method comprising:
after a starting signal is received, controlling the compressor to be started, and acquiring the initial exhaust temperature when the compressor is started;
obtaining a first discharge temperature of the compressor after a first period of time when the compressor is on;
judging whether the compressor is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature;
if so, acquiring a second exhaust temperature and a first suction temperature of the compressor, and determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature;
if not, stopping supplying power to the compressor, and outputting prompt information of abnormal starting of the compressor.
2. The method according to claim 1, wherein the determining whether the compressor is normally turned on according to the difference between the first discharge temperature and the initial discharge temperature comprises:
judging whether the difference value between the first exhaust temperature and the initial exhaust temperature is smaller than a first threshold value or not, and continuing for a second time period;
if so, acquiring the current water temperature of the water in the water heater, and judging whether the compressor is normally started or not according to the current water temperature;
if not, the compressor is normally started.
3. The method according to claim 2, wherein the determining whether the compressor is normally started according to the current water temperature specifically includes:
judging whether the first exhaust temperature is less than or equal to a temperature threshold value, and continuing for a third time, wherein the temperature threshold value is the sum of the current water temperature and a first temperature difference threshold value;
if yes, the compressor is not normally started;
if not, the compressor is normally started.
4. The method according to any one of claims 1-3, further comprising: acquiring initial suction temperature when the compressor is started;
determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature, specifically including:
determining a first difference between the initial exhaust temperature and the second exhaust temperature;
determining a second difference between the first inspiratory temperature and the initial inspiratory temperature;
and determining whether the compressor normally operates according to the first difference value and the second difference value.
5. The method according to claim 4, wherein the determining whether the compressor is operating normally according to the first difference and the second difference comprises:
judging whether the first difference value is larger than or equal to a second temperature difference threshold value or not, wherein the second difference value is larger than or equal to a third temperature difference threshold value, and lasting for a fourth time;
and if so, the compressor does not normally operate.
6. The method of claim 5, further comprising, after the compressor is not operating properly:
and stopping supplying power to the compressor and outputting prompt information of abnormal operation of the compressor.
7. The method according to claim 4, wherein said obtaining a second discharge temperature and a first suction temperature of said compressor comprises:
and acquiring a second exhaust temperature and a first suction temperature of the compressor after judging that the compressor is normally started for a fifth time period.
8. A compressor control apparatus comprising:
the temperature acquisition module is used for controlling the compressor to be started after receiving a starting signal and acquiring the initial exhaust temperature when the compressor is started; obtaining a first discharge temperature of the compressor after a first period of time when the compressor is on;
the starting judging module is used for judging whether the compressor is normally started or not according to the difference value between the first exhaust temperature and the initial exhaust temperature;
the operation judgment module is used for acquiring a second exhaust temperature and a first suction temperature of the compressor when the compressor is normally started, and determining whether the compressor normally operates according to the second exhaust temperature and the first suction temperature;
and the abnormity prompting module is used for stopping supplying power to the compressor when the compressor is not normally started and outputting prompt information of abnormal starting of the compressor.
9. A compressor comprising a processor, and a memory communicatively coupled to the processor;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory to implement the method of any of claims 1 to 7.
10. A computer-readable storage medium having computer-executable instructions stored therein, which when executed by a processor, are configured to implement the method of any one of claims 1 to 7.
CN202210756151.4A 2022-06-30 2022-06-30 Compressor control method and device, medium and compressor Pending CN115306691A (en)

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