Compressor control method, device, medium and compressor

Abstract

The present application relates to the field of smart home technology, and specifically provides a compressor control method, device, medium and compressor, which aims to solve the technical problems of high cost and low accuracy of compressor shutdown detection. The method includes: after receiving the power-on signal, controlling the compressor to start, and obtaining the initial exhaust temperature when the compressor is turned on; after the first time period of the compressor being turned on, obtaining the first exhaust temperature of the compressor; judging whether the compressor is turned on normally according to the difference between the first exhaust temperature and the initial exhaust temperature; if so, obtaining the second exhaust temperature and the first intake temperature of the compressor, and determining whether the compressor is operating normally according to the second exhaust temperature and the first intake temperature; if not, stopping power supply to the compressor, and outputting abnormal prompt information of compressor start-up. The method of the present application can improve the accuracy of compressor shutdown detection without increasing costs.

Description

Technical Field

[0001] The present application relates to the field of smart home technology, and in particular to a compressor control method, device, medium and compressor. Background Art

[0002] Water heaters are commonly used water heating equipment in daily life. With the improvement of living standards, people's requirements for water heaters are getting higher and higher, and various water heaters have emerged, such as heat pump water heaters mainly based on space energy water heaters and air energy water heaters.

[0003] The heat pump water heater mainly includes structures such as an evaporator, a compressor, a condenser, an expansion valve, and a water tank. It can absorb heat energy from the sun and / or the air, and use a small amount of electrical energy to heat the water in the water tank. The compressor of the heat pump water heater may shut down due to various reasons during operation. In order to avoid safety hazards, the power supply of the compressor also needs to be turned off synchronously when it shuts down for shutdown protection. In the prior art, it is generally determined whether the compressor has shut down by detecting the compressor current. If the controller of the compressor detects that the compressor current exceeds the current threshold, that is, an overcurrent occurs, it can be determined that the compressor has shut down, and the power supply to the compressor is stopped. However, the method of determining whether the compressor has shut down by detecting the current requires the addition of a current detection device, which will increase the production cost of the compressor. In addition, compressor shutdown does not necessarily lead to overcurrent, and the result of determining whether the compressor has shut down by only detecting the current is not accurate.

[0004] Therefore, a compressor control solution is needed that does not increase the cost and can accurately detect compressor shutdown. Summary of the invention

[0005] In order to overcome the above-mentioned defects, the present application is proposed to provide a compressor control method, device, medium and compressor that solve or at least partially solve the technical problems of inaccurate and high cost of existing compressor shutdown detection.

[0006] In a first aspect, a compressor control method is provided, wherein the compressor is applied to a water heater, and the method comprises:

[0007] After receiving the start-up signal, controlling the compressor to start, and obtaining the initial exhaust temperature when the compressor is started;

[0008] After the compressor is turned on for a first time period, obtaining a first exhaust temperature of the compressor;

[0009] judging whether the compressor is normally turned on according to the difference between the first exhaust temperature and the initial exhaust temperature;

[0010] If yes, obtaining a second exhaust temperature and a first intake temperature of the compressor, and determining whether the compressor operates normally according to the second exhaust temperature and the first intake temperature;

[0011] If not, the power supply to the compressor is stopped, and a prompt message indicating that the compressor is turned on abnormally is output.

[0012] In a technical solution of the compressor control method, judging whether the compressor is normally turned on according to the difference between the first exhaust temperature and the initial exhaust temperature specifically includes:

[0013] determining whether a difference between the first exhaust temperature and the initial exhaust temperature is less than a first threshold and lasts for a second time period;

[0014] If yes, then obtain the current water temperature of the water in the water heater, and determine whether the compressor is turned on normally according to the current water temperature;

[0015] If not, the compressor is turned on normally.

[0016] In a technical solution of the compressor control method, judging whether the compressor is normally turned on according to the current water temperature specifically includes:

[0017] Determining whether the first exhaust temperature is less than or equal to a temperature threshold and lasts for a third time period, where the temperature threshold is the sum of the current water temperature and a first temperature difference threshold;

[0018] If yes, the compressor is not turned on normally;

[0019] If not, the compressor is turned on normally.

[0020] In a technical solution of the above compressor control method, the method further includes: obtaining an initial suction temperature when the compressor is turned on;

[0021] Then, determining whether the compressor is operating normally according to the second exhaust temperature and the first suction temperature specifically includes:

[0022] determining a first difference between the initial exhaust temperature and the second exhaust temperature;

[0023] determining a second difference between the first intake air temperature and the initial intake air temperature;

[0024] Whether the compressor operates normally is determined according to the first difference and the second difference.

[0025] In a technical solution of the compressor control method, determining whether the compressor is operating normally according to the first difference and the second difference specifically includes:

[0026] Determine whether the first difference is greater than or equal to a second temperature difference threshold, and the second difference is greater than or equal to a third temperature difference threshold, and lasts for a fourth time period;

[0027] If so, the compressor is not operating properly.

[0028] In a technical solution of the above compressor control method, after the compressor fails to operate normally, the method further includes:

[0029] The power supply to the compressor is stopped, and a prompt message indicating abnormal operation of the compressor is output.

[0030] In a technical solution of the above compressor control method, obtaining the second exhaust temperature and the first intake temperature of the compressor specifically includes:

[0031] After determining that the compressor is normally turned on for a fifth time, a second exhaust temperature and a first intake temperature of the compressor are acquired.

[0032] In a second aspect, a compressor control device is provided, comprising:

[0033] A temperature acquisition module, for controlling the compressor to start after receiving a start-up signal, and acquiring an initial exhaust temperature when the compressor is turned on; and acquiring a first exhaust temperature of the compressor after the compressor is turned on for a first time period;

[0034] a start-up judgment module, configured to judge whether the compressor is normally started according to a difference between the first exhaust temperature and the initial exhaust temperature;

[0035] an operation judgment module, configured to obtain a second exhaust temperature and a first intake temperature of the compressor when the compressor is normally turned on, and determine whether the compressor is operating normally according to the second exhaust temperature and the first intake temperature;

[0036] The abnormal prompt module is used to stop supplying power to the compressor when the compressor is not turned on normally, and output compressor start-up abnormal prompt information.

[0037] In a third aspect, a compressor is provided, comprising a processor, and a memory communicatively connected to the processor;

[0038] The memory stores computer-executable instructions;

[0039] The processor executes the computer-executable instructions stored in the memory to implement the method described in any of the above technical solutions.

[0040] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method described in any of the above technical solutions.

[0041] The above one or more technical solutions of the present application have at least one or more of the following beneficial effects:

[0042] The method provided by the present application can control the compressor to start after receiving the start-up signal, and obtain the initial exhaust temperature when the compressor is turned on; after the first time length of the compressor is turned on, obtain the first exhaust temperature of the compressor; judge whether the compressor is turned on normally according to the difference between the first exhaust temperature and the initial exhaust temperature; if so, obtain the second exhaust temperature and the first suction temperature of the compressor, and determine whether the compressor is running normally according to the second exhaust temperature and the first suction temperature; if not, stop supplying power to the compressor and output the abnormal prompt information of the compressor start. The method of the present application, first, can determine whether the compressor is turned on normally according to the change of the compressor exhaust temperature after the compressor is turned on. If the compressor is not turned on normally, it means that the compressor has stopped at this time. Through such a setting, it can be detected whether an accident occurs when the compressor is started and causes the compressor to stop, and the accuracy of the shutdown detection during the compressor startup process is improved without increasing the cost of the compressor. Secondly, if it is determined that the compressor is turned on normally, it can be judged whether the compressor is running normally according to the exhaust temperature and the suction temperature after the compressor is turned on normally. If the compressor is not running normally, it means that the compressor may have stopped at this time. Through such a setting, it can be detected whether the compressor is stopped due to an accident or failure during operation, and the accuracy of the shutdown detection during the operation of the compressor is improved without increasing the cost of the compressor. In summary, based on the above settings, the accuracy and comprehensiveness of compressor shutdown detection can be improved, and the detection method is simple and convenient; in addition, since the suction temperature and exhaust temperature themselves are parameters that need to be detected when the compressor is running, the above detection method will not increase the cost of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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 present application.

[0044] Figure 1 It is a structural schematic diagram of a heat pump water heater in the prior art;

[0045] Figure 2 is a system architecture diagram of an embodiment of the present application;

[0046] Figure 3 is a flow chart of a compressor control method provided by an embodiment of the present application;

[0047] Figure 4 is a flow chart of a compressor control method provided by another embodiment of the present application;

[0048] Figure 5 is a structural schematic diagram of a compressor control device according to an embodiment of the present application;

[0049] Figure 6 It is a schematic diagram of the structure of a compressor according to an embodiment of the present application.

[0050] List of reference numerals:

[0051] 1. Evaporator; 2. Compressor; 21. Compressor exhaust port; 22. Compressor intake port; 3. Condenser; 4. Expansion valve; 5. Water storage tank; 6. Four-way valve; 7. Compressor control device; 8. Temperature sensor; 51. Temperature acquisition module; 52. Start judgment module; 53. Operation judgment module; 54. Abnormal prompt module.

[0052] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0054] Figure 1 It is a schematic diagram of the structure of the heat pump water heater of the prior art. Figure 1As shown, 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 other structures. When the heat pump water heater is in operation, it can absorb heat energy from the sun and / or the air, and use a small amount of electric energy to heat the water in the water storage tank. Specifically, the evaporator 1 can absorb heat from the sun and / or the air, and change the "low temperature and low pressure" liquid refrigerant into a "low temperature and low pressure" gaseous refrigerant. The compressor 2 works to change the "low temperature and low pressure" gaseous refrigerant into a "high temperature and high pressure" gaseous refrigerant. The "high temperature and high pressure" gaseous refrigerant releases heat in the condenser 3 (a microchannel heat exchanger mounted on the outer wall of the inner tank of the water storage tank 5), thereby heating the water in the inner tank of the water storage tank 5, and then becomes a "low temperature and high pressure" liquid refrigerant. The "low temperature and high pressure" liquid refrigerant, after passing through the expansion valve 4, becomes a "low temperature and low pressure" liquid refrigerant. This cycle is repeated to heat the water in the water storage tank 5 to the target temperature. The four-way valve 6 plays a reversing role and is used to switch between the two opposite processes of heating and defrosting.

[0055] During the operation of the heat pump water heater, the compressor plays a vital role. However, the compressor may shut down due to various accidents or failures during operation. In order to avoid potential safety hazards, the power supply of the compressor also needs to be turned off synchronously when it shuts down for shutdown protection. In the prior art, it is generally determined whether the compressor has shut down by detecting the compressor current. If the compressor controller detects that the compressor current exceeds the current threshold, that is, overcurrent occurs, it can be determined that the compressor has shut down, and the power supply to the compressor is stopped.

[0056] However, the method of judging whether the compressor has stopped by detecting the current requires adding a current detection device to the compressor, which increases the production cost of the compressor. In addition, the reactions of the compressor after stopping are different and do not necessarily lead to overcurrent. Judging whether the compressor has stopped by only detecting the current is not accurate.

[0057] The compressor control method provided by the present application is intended to solve the above technical problems of the prior art. The method of the present application, first, can determine whether the compressor is turned on normally according to the change of the compressor exhaust temperature after the compressor is turned on. If the compressor is not turned on normally, it means that the compressor has stopped at this time. Through such a setting, it is possible to detect whether an accident occurs when the compressor is started and causes the compressor to stop, and the accuracy of the shutdown detection during the compressor startup process is improved without increasing the cost of the compressor. Secondly, if it is determined that the compressor is turned on normally, it can be judged whether the compressor is running normally according to the exhaust temperature and the suction temperature after the compressor is turned on normally. If the compressor is not running normally, it means that the compressor may have stopped at this time. Through such a setting, it is possible to detect whether the compressor is stopped due to an accident or failure during operation, and the accuracy of the shutdown detection during the operation of the compressor is improved without increasing the cost of the compressor. In summary, based on the above settings, the accuracy and comprehensiveness of the compressor shutdown detection can be improved, and the detection means are simple and convenient; in addition, since the suction temperature and the exhaust temperature themselves are the parameters that need to be detected when the compressor is running, the above detection means will not increase the cost of the compressor.

[0058] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0059] Figure 2 is a system architecture diagram of an embodiment of the present application, such as Figure 2As shown, 2 is a compressor, 21 is a compressor exhaust port, 22 is a compressor intake port, 5 is a water storage tank, 7 is a compressor control device, and 8 is a temperature sensor. After receiving the start-up signal, the compressor control device 7 controls the compressor 2 to start, and uses the temperature sensor 8 set at the compressor exhaust port 21 to obtain the initial exhaust temperature when the compressor 2 is turned on, and uses the temperature sensor 8 set at the compressor intake port 22 to obtain the initial intake temperature when the compressor 2 is turned on. After the first time period of the compressor 2 being turned on, the first exhaust temperature of the compressor 2 is obtained, and the current water temperature is obtained using the temperature sensor 8 set in the water storage tank 5. Afterwards, according to the difference between the first exhaust temperature and the initial exhaust temperature, and the current water temperature, it is determined whether the compressor 2 is turned on normally. If the compressor 2 is not turned on normally, the power supply to the compressor 2 is stopped, and the abnormal prompt information of the compressor start is output. If the compressor 2 is turned on normally, the second exhaust temperature and the first intake temperature of the compressor are obtained, and it is determined whether the compressor is running normally according to the second exhaust temperature, the first intake temperature, the initial exhaust temperature and the initial intake temperature. If the compressor 2 does not operate normally, the power supply to the compressor 2 is stopped, and a prompt message indicating abnormal operation of the compressor is output.

[0060] Embodiment 1

[0061] Figure 3 1 is a flowchart of a compressor control method provided by an embodiment of the present application. The executor of the compressor control method provided by the embodiment of the present application may be a compressor or a compressor control device. This embodiment describes the compressor control method with the executor being a compressor control device. The compressor provided by this embodiment may be applied to a water heater, such as Figure 3 As shown, the compressor control method may include the following steps:

[0062] Step S101: after receiving a start-up signal, the compressor is controlled to start, and the initial exhaust temperature when the compressor is started is obtained.

[0063] In this embodiment, after receiving the heating instruction input by the user, the water heater will send a power-on signal to the compressor control device, and after receiving the power-on signal, the compressor control device will control the compressor to turn on.

[0064] In this embodiment, the exhaust temperature of the compressor can be obtained by using a temperature sensor disposed at the exhaust port of the compressor.

[0065] In this embodiment, if the compressor is turned on normally, the exhaust temperature will increase and the suction temperature will decrease compared to when the compressor is turned on normally for a period of time. If the compressor is not turned on normally, the exhaust temperature and the suction temperature will not change compared to when the compressor is turned on for a period of time. The suction temperature is the temperature of the air sucked in by the compressor, and the exhaust temperature is the temperature of the air ejected by the compressor after the compressor is driven to do work.

[0066] When the compressor is just turned on, the suction temperature will not change much in a short period of time, and the reaction is not sensitive; however, because the inhaled air needs to drive the compressor to work, the heat generated will cause the exhaust temperature to change detectably in a short period of time, and the reaction is more sensitive. Therefore, by detecting the change in the exhaust temperature to determine whether the compressor is turned on normally, the accuracy of the compressor shutdown detection can be improved.

[0067] Step S102: After the compressor is turned on for a first period of time, a first exhaust temperature of the compressor is obtained.

[0068] In this embodiment, the first duration may be set to the duration of a detectable temperature change in the exhaust temperature. The specific value may be flexibly set by those skilled in the art according to actual conditions and is not limited here.

[0069] Step S103: judging whether the compressor is normally turned on according to the difference between the first exhaust temperature and the initial exhaust temperature.

[0070] In this embodiment, if the compressor is turned on normally, the exhaust temperature will increase after a period of time; if the compressor is not turned on normally, the exhaust temperature will remain basically unchanged after a period of time. Therefore, it is possible to judge whether the compressor is turned on normally by the difference between the first exhaust temperature and the initial exhaust temperature.

[0071] In one embodiment, the above-mentioned step S103 determines whether the compressor is turned on normally based on the difference between the first exhaust temperature and the initial exhaust temperature, and may include: determining whether the difference between the first exhaust temperature and the initial exhaust temperature is less than a first threshold value and lasts for a second time period; if so, obtaining the current water temperature of the water in the water heater, and determining whether the compressor is turned on normally based on the current water temperature; if not, the compressor is turned on normally.

[0072] In this embodiment, when judging whether the compressor is turned on normally, it is necessary to judge whether the difference between the first exhaust temperature and the initial exhaust temperature is less than the first threshold value and lasts for a second time period, in order to determine that the occurrence of the difference is not an emergency event caused by accidental factors, but an event that can occur stably within a period of time. The specific value of the second time period can be flexibly set by those skilled in the art, and no limitation is made here.

[0073] In this embodiment, the current water temperature can be obtained by using a temperature sensor disposed in the water storage tank of the water heater.

[0074] In this embodiment, if the difference between the first exhaust temperature and the initial exhaust temperature is less than the first threshold value and lasts for a second time period, it means that the change in exhaust temperature is small after the compressor is turned on for a period of time, and it can be preliminarily considered that the compressor is not turned on. However, the small change in exhaust temperature may also be caused by the entry of cold water. Therefore, in order to improve the accuracy of the judgment and avoid misjudgment, it is also possible to further judge whether the change in exhaust temperature is caused by the compressor not being turned on based on the current water temperature of the water in the water heater. Through such a setting, the accuracy of detecting whether the compressor is turned on normally can be further improved, thereby improving the accuracy of detecting the compressor shutdown at startup.

[0075] In one embodiment, judging whether the compressor is turned on normally based on the current water temperature may include: judging whether the first exhaust temperature is less than or equal to a temperature threshold and lasts for a third time period, where the temperature threshold is the sum of the current water temperature and the first temperature difference threshold; if so, the compressor is not turned on normally; if not, the compressor is turned on normally.

[0076] In this embodiment, when judging whether the compressor is turned on normally according to the current water temperature, it is necessary to judge whether the first exhaust temperature is less than or equal to the temperature threshold and lasts for a third time. This is to determine that the occurrence of the first exhaust temperature is not an emergency caused by accidental factors, but an event that can occur stably over a period of time. The specific value of the third time can be flexibly set by those skilled in the art, and no restrictions are made here. The third time can be the same as the second time, or it can be different from the second time. In addition, the specific value of the first temperature difference threshold can also be flexibly set by those skilled in the art according to actual conditions, and no restrictions are made here.

[0077] In this embodiment, judging whether the compressor is turned on normally based on the current water temperature is to exclude the situation where the change in the exhaust temperature is small due to the entry of cold water. If the change in the exhaust temperature is caused by the entry of cold water, the first exhaust temperature must be greater than the current water temperature of the water in the water heater. In addition, in order to avoid misjudgment caused by accidental factors, a temperature difference threshold can be added to the current water temperature, that is, only when the first exhaust temperature is greater than the sum of the current water temperature and the first temperature difference threshold, it is indicated that the change in the exhaust temperature is caused by the entry of cold water and the compressor is turned on normally. If the first exhaust temperature is less than or equal to the temperature threshold and lasts for a third time, it means that the change in the exhaust temperature is not caused by the entry of cold water, but is caused by the failure of the compressor to start normally.

[0078] In this embodiment, by judging the size of the first exhaust temperature and the sum of the current water temperature and the first temperature difference threshold, and excluding the situation where the exhaust temperature change value is small due to the entry of cold water, the accuracy of judging whether the compressor is started normally by the change value of the exhaust temperature can be further improved, and the misjudgment caused by the entry of cold water can be avoided, thereby further improving the accuracy of detecting whether the compressor is started normally.

[0079] Step S104: If yes, then obtain the second exhaust temperature and the first intake temperature of the compressor, and determine whether the compressor operates normally according to the second exhaust temperature and the first intake temperature.

[0080] In this embodiment, if it is detected that the compressor is turned on normally, it is also necessary to detect whether the compressor is running normally, so as to detect whether the compressor is shut down during operation.

[0081] In this embodiment, the specific implementation of determining whether the compressor operates normally according to the second exhaust gas temperature and the first suction temperature in the above step S104 is detailed in Example 2.

[0082] In this embodiment, the suction temperature of the compressor may be acquired by using a temperature sensor disposed at the suction port of the compressor.

[0083] In one embodiment, the obtaining of the second exhaust temperature and the first intake temperature of the compressor in step S104 may include: obtaining the second exhaust temperature and the first intake temperature of the compressor after determining that the compressor is normally turned on for a fifth time period.

[0084] In this embodiment, the fifth time period may be the time period from when the compressor is started to when it enters a steady-state operation. The specific value of the fifth time period may be flexibly set by those skilled in the art, and no limitation is imposed herein.

[0085] In this embodiment, after the compressor is started, it takes a period of time to enter steady-state operation, at which time the state of the compressor will be stable, and 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 operating normally according to the second exhaust temperature and the first suction temperature, the second exhaust temperature and the first suction temperature of the compressor can be obtained after the fifth time period of determining that the compressor is normally turned on.

[0086] Step S105: If not, stop supplying power to the compressor and output a compressor startup abnormality prompt message.

[0087] In this embodiment, if the compressor is not turned on normally, it means that the compressor has stopped, and the power supply to the compressor is stopped to avoid potential safety hazards. In addition, the compressor start abnormality prompt information can also be output to remind the user that the compressor has stopped due to abnormal start, and it is necessary to check and take corresponding measures in time.

[0088] In this embodiment, the suction temperature and the exhaust temperature of the compressor are operating parameters that the compressor originally needs to detect, and the implementation of steps S101-S105 does not increase the cost of the compressor.

[0089] In an embodiment of the present application, firstly, after the compressor is turned on, it can be determined whether the compressor is turned on normally according to the change of the compressor exhaust temperature. If the compressor is not turned on normally, it means that the compressor has stopped at this time. Through such a setting, it is possible to detect whether an accident occurs when the compressor is started, causing it to stop. Without increasing the cost of the compressor, the accuracy of the shutdown detection during the compressor startup process is improved. Secondly, if it is determined that the compressor is turned on normally, it can be judged whether the compressor is running normally according to the exhaust temperature and the intake temperature after the compressor is turned on normally. If the compressor is not running normally, it means that the compressor may have stopped at this time. Through such a setting, it is possible to detect whether the compressor is stopped due to an accident or failure during operation. Without increasing the cost of the compressor, the accuracy of the shutdown detection during the operation of the compressor is improved. In summary, based on the above settings, the accuracy and comprehensiveness of the compressor shutdown detection can be improved, and the detection means are simple and convenient; in addition, since the intake temperature and the exhaust temperature themselves are the parameters that need to be detected when the compressor is running, the above detection means will not increase the cost of the compressor.

[0090] Embodiment 2

[0091] Figure 4 1 is a flowchart of a compressor control method provided by an embodiment of the present application. The executor of the compressor control method provided by the embodiment of the present application may be a compressor or a compressor control device. This embodiment describes the compressor control method with the executor being a compressor control device. The compressor provided by this embodiment may be applied to a water heater, such as Figure 4 As shown, the compressor control method may include the following steps:

[0092] Step S201: Determine a first difference between an initial exhaust temperature and a second exhaust temperature.

[0093] In this embodiment, the first difference between the initial exhaust temperature and the second exhaust temperature refers to the difference between the exhaust temperature after the compressor is started and runs normally and the exhaust temperature when the compressor is started.

[0094] Step S202: acquiring the initial intake air temperature when the compressor is turned on, and determining a second difference between the first intake air temperature and the initial intake air temperature.

[0095] In this embodiment, in order to improve the accuracy of determining whether the compressor operates normally, the initial suction temperature can be obtained simultaneously with the initial exhaust temperature in the first embodiment.

[0096] In this embodiment, the second difference between the first suction temperature and the initial suction temperature refers to the difference between the suction temperature after the compressor is started and runs normally and the suction temperature when the compressor is started.

[0097] Step S203: determining whether the compressor operates normally according to the first difference and the second difference.

[0098] In this embodiment, after determining that the compressor is normally turned on for the fifth time, the second exhaust temperature and the first intake temperature of the compressor can be obtained in real time, and the above steps S201-S203 are continuously performed according to the temperatures obtained in real time.

[0099] In one embodiment, the above step S203 determines whether the compressor is operating normally based on the first difference and the second difference, which may include: judging 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 lasts for a fourth time period; if so, the compressor is not operating normally.

[0100] In this embodiment, if the compressor operates normally, after the compressor operates for a period of time, the exhaust temperature will increase and the suction temperature will decrease compared to when the compressor is turned on. If the compressor does not operate normally, contrary to normal operation, the exhaust temperature will decrease and the suction temperature will increase. Therefore, it can be determined whether the compressor operates normally by detecting whether the exhaust temperature decreases and whether the suction temperature increases.

[0101] In this embodiment, when determining whether the compressor is operating normally, 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 lasts for a fourth time period. This is to determine that the occurrence of the first difference and the second difference is not an emergency caused by accidental factors, but an event that can occur stably over a period of time. The specific value of the fourth time period can be flexibly set by those skilled in the art, and no limitation is made here.

[0102] In this embodiment, the specific value of the second temperature difference threshold can be flexibly set by those skilled in the art according to actual conditions, and no limitation is made here. Similarly, the specific value of the third temperature difference threshold can be flexibly set by those skilled in the art according to actual conditions, and no limitation is made here. The second temperature difference threshold can be the same as or different from the third temperature difference threshold.

[0103] 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 lasts for a fourth time period, it can be said that the compressor is operating abnormally. Through such a setting, the accuracy of determining whether the compressor is operating normally can be improved without increasing the cost, and misjudgment caused by accidental factors can be avoided, thereby improving the accuracy of compressor shutdown detection during operation.

[0104] In one embodiment, after the compressor does not operate normally, the method may further include: stopping power supply to the compressor and outputting a prompt message indicating abnormal operation of the compressor.

[0105] In this embodiment, if the compressor does not operate normally, it means that the compressor has stopped due to an accident or failure, and the power supply to the compressor is stopped to avoid safety hazards. In addition, the compressor operation abnormality prompt information can also be output to remind the user that the compressor has stopped due to abnormal operation and needs to be checked and corresponding measures taken in time. Through such a setting, the safety hazards caused by the compressor shutdown can be avoided, and the user can be reminded in time to improve the user experience.

[0106] In an embodiment of the present application, if the compressor operates normally, then after the compressor has been running for a period of time, the exhaust temperature will increase and the intake temperature will decrease compared to when it is turned on. If the compressor does not operate normally, contrary to normal operation, the exhaust temperature will decrease and the intake temperature will increase. Therefore, it is possible to determine whether the compressor is operating normally by detecting the exhaust temperature change value and the intake temperature change value after the compressor has been running for a period of time, thereby improving the accuracy of the compressor shutdown detection during operation, and the detection means are simple and convenient. In addition, since the intake temperature and the exhaust temperature themselves are parameters that need to be detected when the compressor is running, determining whether the compressor is operating normally by using the exhaust temperature change value and the intake temperature change value will not increase the cost of the compressor.

[0107] The compressor control method of the present application is described below with reference to a specific embodiment.

[0108] Embodiment 3

[0109] In a specific embodiment, a user turns on the space energy water heater at home to heat water. After receiving the heating instruction, the space energy water heater sends a start signal to the compressor control device therein. After receiving the start signal, the compressor control device controls the compressor to start and turns on the shutdown protection throughout the process. The specific compressor control process is as follows:

[0110] In the first step, after receiving the start-up signal, the compressor control device controls the compressor to start, and obtains the initial exhaust temperature Tp0 and the initial intake temperature Tx0 when the compressor is started.

[0111] In the second step, the compressor control device obtains a first exhaust gas temperature Tp1 of the compressor after the compressor is turned on for a first period of time.

[0112] In the third step, the compressor control device determines that the difference between the first exhaust temperature Tp1 and the initial exhaust temperature Tp0 is greater than the first threshold, and the first exhaust temperature Tp1 is greater than the current water temperature of the water in the water heater, and the compressor is turned on normally.

[0113] In the fourth step, the compressor control device obtains the second exhaust temperature Tp2 and the first intake temperature Tx1 of the compressor 5 minutes after determining that the compressor is normally started, and determines that 15 minutes after normal start-up, the first difference between the initial exhaust temperature Tp0 and the second exhaust temperature Tp2 is greater than the second temperature difference threshold, and the second difference between the first intake temperature Tx1 and the initial intake temperature Tx0 is greater than the third temperature difference threshold, and lasts for 30 seconds, then the compressor is not operating normally.

[0114] The fifth step is to stop supplying power to the compressor and output a compressor abnormal operation prompt message to remind the user that the compressor is operating abnormally, causing the water heater to fail to heat normally and that corresponding measures need to be taken in time.

[0115] Figure 5 is a schematic diagram of the structure of a compressor control device according to an embodiment of the present application. Figure 5 As shown, the compressor control device includes: a temperature acquisition module 51, a start judgment module 52, an operation judgment module 53 and an abnormal prompt module 54. The temperature acquisition module 51 is used to control the compressor to start after receiving the start-up signal, and to obtain the initial exhaust temperature when the compressor is turned on; after the first time period of the compressor being turned on, the first exhaust temperature of the compressor is obtained; the start judgment module 52 is used to determine whether the compressor is normally turned on according to the difference between the first exhaust temperature and the initial exhaust temperature; the operation judgment module 53 is used to obtain the second exhaust temperature and the first suction temperature of the compressor when the compressor is normally turned on, and determine whether the compressor is operating normally according to the second exhaust temperature and the first suction temperature; the abnormal prompt module 54 is used to stop supplying power to the compressor when the compressor is not normally turned on, and output the abnormal prompt information of the compressor starting. In one embodiment, the description of the specific functions implemented by the compressor control device can refer to steps S101-S105 in Example 1, which will not be repeated here.

[0116] Figure 6 is a schematic diagram of the structure of a compressor according to an embodiment of the present application. Figure 6As shown, the compressor includes: a processor 101, and a memory 102 that is communicatively connected to the processor 101; the memory 102 stores computer-executable instructions; the processor 101 executes the computer-executable instructions stored in the memory 102 to implement the steps of the compressor control method in the above-mentioned method embodiments.

[0117] In the above compressor, the memory 102 and the processor 101 are electrically connected directly or indirectly to realize data transmission or interaction. For example, these elements can be electrically connected to each other through one or more communication buses or signal lines, such as through a bus connection. The memory 102 stores computer-executable instructions for implementing the data access control method, including at least one software function module that can be stored in the memory 102 in the form of software or firmware. The processor 101 executes various functional applications and data processing by running the software programs and modules stored in the memory 102.

[0118] 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 programmable read-only memory (EPROM), an electric erasable programmable read-only memory (EEPROM), etc. The memory 102 is used to store programs, and the processor 101 executes the programs after receiving the execution instruction. Furthermore, the software programs and modules in the above-mentioned memory 102 may also include an operating system, which may include various software components and / or drivers for managing system tasks (such as 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.

[0119] The processor 101 may be an integrated circuit chip having the ability to process signals. The processor 101 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc. The methods, steps, and logic diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0120] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the steps of each method embodiment of the present application.

[0121] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

[0122] It should be understood that the present application is not limited to the precise structures that have been 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 present application is limited only by the appended claims.

Claims

1. A compressor control method, It is characterized in that The compressor is applied to a water heater, and the method comprises: After receiving the start-up signal, controlling the compressor to start, and obtaining the initial exhaust temperature when the compressor is started; After the compressor is turned on for a first time period, obtaining a first exhaust temperature of the compressor; judging whether the compressor is normally turned on according to the difference between the first exhaust temperature and the initial exhaust temperature; If yes, obtaining a second exhaust temperature and a first intake temperature of the compressor, and determining whether the compressor operates normally according to the second exhaust temperature and the first intake temperature; If not, stop supplying power to the compressor and output a prompt message indicating that the compressor is turned on abnormally; The step of judging whether the compressor is normally turned on according to the difference between the first exhaust temperature and the initial exhaust temperature specifically includes: determining whether a difference between the first exhaust temperature and the initial exhaust temperature is less than a first threshold and lasts for a second time period; If yes, then obtain the current water temperature of the water in the water heater, and determine whether the compressor is turned on normally according to the current water temperature; If not, the compressor is turned on normally.

2. The method according to claim 1, It is characterized in that The determining whether the compressor is normally turned on according to the current water temperature specifically includes: Determining whether the first exhaust temperature is less than or equal to a temperature threshold and lasts for a third time period, where the temperature threshold is the sum of the current water temperature and a first temperature difference threshold; If yes, the compressor is not turned on normally; If not, the compressor is turned on normally.

3. The method according to any one of claims 1 to 2, It is characterized in that The method further comprises: obtaining an initial suction temperature when the compressor is turned on; Then, determining whether the compressor is operating normally according to the second exhaust temperature and the first suction temperature specifically includes: determining a first difference between the initial exhaust temperature and the second exhaust temperature; determining a second difference between the first intake air temperature and the initial intake air temperature; Whether the compressor operates normally is determined according to the first difference and the second difference.

4. The method according to claim 3, It is characterized in that The determining whether the compressor operates normally according to the first difference and the second difference specifically includes: Determine whether the first difference is greater than or equal to a second temperature difference threshold, and the second difference is greater than or equal to a third temperature difference threshold, and lasts for a fourth time period; If so, the compressor is not operating properly.

5. The method according to claim 4, It is characterized in that After the compressor does not operate normally, the method further comprises: The power supply to the compressor is stopped, and a prompt message indicating abnormal operation of the compressor is output.

6. The method according to claim 3, It is characterized in that The obtaining of the second exhaust gas temperature and the first intake gas temperature of the compressor specifically includes: After determining that the compressor is normally turned on for a fifth time, a second exhaust temperature and a first intake temperature of the compressor are acquired.

7. A compressor control device, the compressor control device is applied to a water heater, include: A temperature acquisition module, used to control the compressor to start after receiving a start-up signal, and to acquire an initial exhaust temperature when the compressor is started; After the compressor is turned on for a first time period, obtaining a first exhaust temperature of the compressor; a start-up judgment module, configured to judge whether the compressor is normally started according to a difference between the first exhaust temperature and the initial exhaust temperature; an operation judgment module, configured to obtain a second exhaust temperature and a first intake temperature of the compressor when the compressor is normally turned on, and determine whether the compressor is operating normally according to the second exhaust temperature and the first intake temperature; An abnormality prompt module, used for stopping power supply to the compressor when the compressor is not turned on normally, and outputting compressor start abnormality prompt information; The start-up judgment module is specifically used to judge whether the difference between the first exhaust temperature and the initial exhaust temperature is less than a first threshold value and lasts for a second time period; if so, the current water temperature of the water in the water heater is obtained, and whether the compressor is turned on normally according to the current water temperature; if not, the compressor is turned on normally.

8. A compressor comprising a processor and a memory in communication with the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed by a processor.

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