CN114216255B - Control method and device for air conditioner pressure relief and air conditioner - Google Patents
Control method and device for air conditioner pressure relief and air conditioner Download PDFInfo
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- CN114216255B CN114216255B CN202111462526.8A CN202111462526A CN114216255B CN 114216255 B CN114216255 B CN 114216255B CN 202111462526 A CN202111462526 A CN 202111462526A CN 114216255 B CN114216255 B CN 114216255B
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- pressure value
- relief valve
- air conditioner
- compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Abstract
The application relates to the technical field of air conditioner pressure relief, and discloses a control method for air conditioner pressure relief, wherein the air conditioner comprises the following steps: the compressor is communicated with a pressure relief valve between an exhaust pipe and an air return pipe of the compressor; the method comprises the following steps: acquiring a system pressure value of an air conditioner; determining the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve; and controlling the opening degree of the pressure relief valve according to the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve. According to the application, the opening degree of the pressure relief valve can be controlled according to the obtained magnitude relation between the system pressure value and the closing pressure value, so that the pressure in the exhaust pipe at the high pressure side in the refrigerating system is relieved to the air return pipe at the low pressure side, thereby better controlling the system pressure in the refrigerating system, efficiently regulating the system pressure, enabling the compressor to run more stably, improving the air supply comfort and further improving the user experience. The application also discloses a control device for air conditioner pressure relief and an air conditioner.
Description
Technical Field
The application relates to the technical field of air conditioner pressure relief, in particular to a control method and device for air conditioner pressure relief and an air conditioner.
Background
The air conditioner is one of the necessary household appliances, and has very wide application due to the characteristic of quick cooling and heating, and in the process of starting up and running cooling or heating, the air conditioner can cause overhigh system pressure due to improper manual adjustment of the position of an air outlet of an indoor unit by a user or overhigh external environment, and when the system pressure exceeds the maximum load allowed by the system, the air conditioner is stopped or a compressor is damaged, so that the service life of the air conditioner is influenced, and therefore, the system pressure of the air conditioner needs to be adjusted.
In the related art, a control method for reducing the system pressure by reducing the frequency of a compressor and reducing the wind speed of a fan exists, when the system pressure is detected to be too high, the speed of the fan is reduced by controlling the compressor to quickly reduce the frequency, so that the exhaust gas quantity of the compressor is reduced, the pressure in the system is reduced, and the purpose of protecting the compressor is achieved.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
when the system pressure is too high, the system pressure is difficult to be effectively reduced only by reducing the frequency of the compressor and the rotating speed of the fan, so that the compressor is stopped, and the air supply comfort is rapidly reduced by rapidly reducing the frequency of the compressor and the rotating speed of the fan, so that the user experience is poor.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a control method and device for air conditioner pressure relief and an air conditioner, so as to efficiently adjust the system pressure of the air conditioner, improve the running stability of a compressor and improve the air supply comfort.
In some embodiments, a control method for air conditioner pressure relief, the air conditioner comprising: the compressor is communicated with a pressure relief valve between an exhaust pipe and an air return pipe of the compressor; the method comprises the following steps:
acquiring a system pressure value of an air conditioner;
determining the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve;
and controlling the opening degree of the pressure relief valve according to the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve.
In some embodiments, a control device for air conditioning pressure relief includes: the system comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the control method for air conditioner pressure relief when the program instructions are executed.
In some embodiments, an air conditioner includes the control device for air conditioner pressure relief of the above embodiments
The control method and device for air conditioner pressure relief and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
the pressure relief valve is communicated between the exhaust pipe and the air return pipe of the compressor, the refrigerating system can be relieved through the pressure relief valve, the system pressure value in the running process of the air conditioner is obtained, the opening degree of the pressure relief valve is controlled according to the magnitude relation between the obtained system pressure value and the closing pressure value, the pressure in the exhaust pipe at the high pressure side in the refrigerating system is relieved to the air return pipe at the low pressure side, the system pressure in the refrigerating system is controlled better, the system pressure is regulated efficiently, the compressor is enabled to run more stably, the air supply comfort is improved, and the user experience is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic diagram of a control method for air conditioner pressure relief according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a refrigeration system provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another refrigeration system provided by an embodiment of the present disclosure;
fig. 4 is a schematic diagram of another control method for air conditioner pressure relief provided in an embodiment of the present disclosure;
fig. 5 is a schematic diagram of another control method for air conditioner pressure relief provided in an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a control device for air conditioning pressure relief according to an embodiment of the present disclosure.
Reference numerals:
100. a processor (processor); 101. a memory (memory); 102. a communication interface (Communication Interface); 103. a bus; 200. a compressor; 300. a condenser; 400. a throttle device; 500. an evaporator; 600. and a pressure release valve.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
In the embodiment of the disclosure, the intelligent home appliance refers to a home appliance formed after a microprocessor, a sensor technology and a network communication technology are introduced into the home appliance, and has the characteristics of intelligent control, intelligent sensing and intelligent application, the operation process of the intelligent home appliance often depends on the application and processing of modern technologies such as the internet of things, the internet and an electronic chip, for example, the intelligent home appliance can realize remote control and management of a user on the intelligent home appliance by connecting the electronic appliance.
In the disclosed embodiment, the terminal device refers to an electronic device with a wireless connection function, and the terminal device can be in communication connection with the intelligent household electrical appliance through connecting with the internet, or can be in communication connection with the intelligent household electrical appliance through Bluetooth, wifi and other modes. In some embodiments, the terminal device is, for example, a mobile device, a computer, or an in-vehicle device built into a hover vehicle, etc., or any combination thereof. The mobile device may include, for example, a cell phone, smart home device, wearable device, smart mobile device, virtual reality device, etc., or any combination thereof, wherein the wearable device includes, for example: smart watches, smart bracelets, pedometers, etc.
Referring to fig. 1, in some embodiments, a control method for pressure relief of an air conditioner includes: a compressor 200, a relief valve 600 is connected between an exhaust pipe and an air return pipe of the compressor 200;
the method comprises the following steps:
s01, a processor acquires a system pressure value of an air conditioner;
s02, determining the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve by the processor;
s03, the processor controls the opening degree of the pressure relief valve according to the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve.
By adopting the control method for air conditioner pressure relief, which is provided by the embodiment of the disclosure, the pressure relief valve is communicated between the exhaust pipe and the air return pipe of the compressor, the refrigerating system can be decompressed through the pressure relief valve, the opening degree of the pressure relief valve is controlled according to the magnitude relation between the acquired system pressure value and the closing pressure value, so that the pressure in the exhaust pipe at the high pressure side of the refrigerating system is relieved to the air return pipe at the low pressure side, the system pressure in the refrigerating system is better controlled, the system pressure is efficiently regulated, the compressor is enabled to run more stably, the air supply comfort is improved, and the user experience is further improved.
It can be understood that the closing pressure value of the pressure release valve refers to the pressure value of the pressure release valve at the moment when the system pressure meets the condition that pressure release is not needed, that is, the closing pressure value of the pressure release valve is the critical point of whether the pressure release valve needs to be opened or not, and the closing pressure value can be preset by the factory of the air conditioner or set according to the actual working condition of the air conditioner and is not repeated herein.
As shown in conjunction with fig. 2 and 3, in some embodiments, the air conditioner includes a refrigeration system, which is composed of a compressor 200, a condenser 300, a throttling device 400, and an evaporator 500, an exhaust pipe of the compressor 200 is connected to an input end of the condenser 300, an output end of the condenser 300 is connected to an input end of the evaporator 500 through a pipe, the throttling device 400 is connected to a communication pipe between the condenser 300 and the evaporator 500, an output end of the evaporator 500 is connected to an air return pipe of the compressor 200, and a pressure release valve 600 is connected between the exhaust pipe and the air return pipe. In this way, the purpose of cooling or heating is achieved by circulating the refrigerant in the cooling system, since the refrigerant is compressed by the compressor 200 and then discharged through the exhaust pipe, the gas in the high temperature and high pressure state is condensed by the condenser 300, and then throttled and depressurized by the throttling device 400, and finally the gas evaporated into low temperature and low pressure by the evaporator 500 flows into the compressor 200 again through the muffler, a pressure difference is formed between the exhaust pipe and the muffler of the compressor 200, and the high pressure in the exhaust pipe can be decompressed into the muffler of low pressure by the decompression valve 600, thereby reducing the pressure of the cooling system and keeping the stable operation of the compressor 200.
Optionally, the refrigerating system is further provided with a pressure detection module, the pressure detection module is arranged on the high-pressure side of the refrigerating system and is used for detecting a system pressure value, communication connection is established between the pressure detection module and the processor, and the processor can acquire the system pressure value sent by the pressure detection module. Therefore, the system pressure value is detected by the pressure detection module, and the processor can acquire the system pressure value sent by the pressure detection module, so that the acquisition accuracy of the system pressure value is improved, and the acquisition process is simplified.
Referring to fig. 4, in some alternative embodiments, a control method for air conditioner pressure relief includes:
s011, the processor acquires a system high-pressure side pressure value of the air conditioner;
s021, the processor determines the magnitude relation between the high-pressure side pressure value of the system and the closing pressure value of the pressure relief valve;
s031, the processor controls the opening degree of the relief valve according to the magnitude relation between the system high-pressure side pressure value and the closing pressure value of the relief valve.
By adopting the control method for air conditioner pressure relief, which is provided by the embodiment of the disclosure, due to the effect of the throttling device in the refrigerating system of the air conditioner, the high-pressure side and the low-pressure side exist in the refrigerating system, and the compressor is stopped or even damaged due to the fact that the pressure of the high-pressure side is too high, so that the high-pressure side is required to be relieved, the processor acquires the system high-pressure side pressure value of the air conditioner, controls the opening degree of the pressure relief valve according to the magnitude relation between the acquired high-pressure side pressure value and the closing pressure value, and can better regulate the system pressure of the air conditioner and improve the running stability of the compressor.
In some embodiments, the processor obtains the system high side pressure value of the air conditioner and marks the value as P con The preset closing pressure value of the relief valve is recorded as P s The processor determines the magnitude relationship between the system high side pressure value and the closing pressure value of the relief valve, i.e., the processor determines P con And P s According to the size relation between P con And P s The magnitude relation between the two controls the opening degree of the pressure relief valve.
Referring to fig. 5, in some alternative embodiments, a control method for air conditioner pressure relief includes:
s011, the processor acquires a system high-pressure side pressure value of the air conditioner;
s021, the processor determines the magnitude relation between the high-pressure side pressure value of the system and the closing pressure value of the pressure relief valve;
s032, under the condition that the high-pressure side pressure value of the system is smaller than or equal to the closing pressure value, the processor controls the pressure relief valve to be closed;
s033, in case the system high side pressure value is greater than the closing pressure value, the processor controls the relief valve to open.
By adopting the control method for air conditioner pressure relief, the processor determines the magnitude relation between the high-pressure side pressure value of the system and the closing pressure value of the pressure relief valve to control the opening degree of the pressure relief valve by acquiring the high-pressure side pressure value of the air conditioner, and under the condition that the high-pressure side pressure value of the system is smaller than or equal to the closing pressure value, the high-pressure side pressure value of the system of the air conditioner is relatively smaller, the influence on the operation of the compressor is smaller, so that the processor controls the pressure relief valve to be closed, the refrigerating system of the air conditioner is not required to be decompressed, under the condition that the high-pressure side pressure value of the system is larger than the closing pressure value, the operation of the compressor is influenced by the pressure, the compressor is at any time subjected to the risk of shutdown or damage, and therefore, the processor controls the pressure relief valve to be opened, the pressure of the high-pressure side in the refrigerating system is relieved to the low-pressure side, the compressor is rapidly reduced, the compressor is stably operated, and the stability of refrigerating and heating is improved.
Optionally, the system high side pressure value being less than or equal to the closing pressure value means: system high side pressure value P con Less than or equal to the closing pressure value P s 。
Optionally, a system high side pressure value greater than the closing pressure value means: system high side pressure value P con Greater than the closing pressure value P s 。
Optionally, the processor controls the relief valve to open in the event that the system high side pressure value is greater than the closing pressure value, including: and under the condition that the air conditioner is a fixed-frequency air conditioner, the processor controls the pressure relief valve to be opened for pressure relief until the opening is maximum. In this way, when the high-pressure side pressure value of the system is larger than the closing pressure value, the pressure in the system is too high, and the system pressure needs to be reduced to maintain the stable operation of the air conditioner, but when the air conditioner is a constant-frequency air conditioner, the frequency of the compressor cannot be adjusted to be reduced, so that the processor controls the pressure release valve to be opened to release pressure, so that the high-pressure side pressure in the system is released to the low-pressure side, the opening degree of the pressure release valve is controlled to be maximum, the system pressure can be effectively reduced, the operation stability of the air conditioner is improved, and the compressor is protected.
Optionally, when the air conditioner is a fixed-frequency air conditioner, the processor controls the pressure release valve to be opened for pressure release until the opening reaches the maximum, and the method comprises the following steps: and acquiring a system high-pressure side pressure value of the air conditioner, starting timing under the condition that the system high-pressure side pressure value is smaller than or equal to a closing pressure value, and controlling the pressure relief valve to be closed after the system high-pressure side pressure value is smaller than or equal to the closing pressure value for a duration of t 3. Therefore, for a fixed-frequency air conditioner, the frequency of the compressor cannot be changed, the system pressure cannot be reduced by reducing the frequency of the compressor under the condition that the obtained system high-pressure side pressure value is larger than the closing pressure value, so that the processor needs to control the opening of the pressure relief valve to release pressure, the system pressure is quickly reduced, the pressure relief capacity of the pressure relief valve reaches the strongest after the opening of the pressure relief valve is maximum, the processor obtains the system high-pressure side pressure value of the air conditioner again, starts timing when the system high-pressure side pressure value is smaller than or equal to the closing pressure value, controls the closing of the pressure relief valve after the duration t3, and has better pressure reducing effect when the system high-pressure side pressure value is smaller than or equal to the closing pressure value for the duration t3, if the state that the pressure relief valve is continuously kept open, the system pressure is insufficient, the refrigerating or heating effect is influenced, and the air conditioner is controlled to be operated stably.
In a specific embodiment, the time period t3 may be 20 seconds. After the pressure relief valve is opened to the maximum opening degree to relieve the pressure of the refrigerating system, if the high-pressure side pressure value of the system is smaller than or equal to the closing pressure value for 20 seconds, the pressure reduction effect of the system pressure is good at the moment, and the processor needs to control the pressure relief valve to be closed in order to ensure the refrigerating and heating effects of the air conditioner.
Optionally, the processor controls the relief valve to open in the event that the system high side pressure value is greater than the closing pressure value, including: and under the condition that the air conditioner is a variable-frequency air conditioner, the processor acquires the duration that the high-pressure side pressure value of the system is larger than the closing pressure value, and under the condition that the duration is larger than t1, the processor controls the pressure relief valve to be opened. Therefore, under the condition that the high-pressure side pressure value of the system is larger than the closing pressure value, the pressure in the system is too high, the system pressure needs to be reduced to maintain the stable operation of the air conditioner, but under the condition that the air conditioner is a variable-frequency air conditioner, the compressor has self-regulating capability, so that the processor obtains the time that the high-pressure side pressure value of the system is larger than the closing pressure value, and under the condition that the time is larger than t1, the processor controls the pressure relief valve to be opened, because the processor obtains the time that the high-pressure side pressure value of the system is larger than the closing pressure value for t1, the self-regulating of the compressor can not effectively reduce the system pressure at the moment, the processor controls the pressure relief valve to be opened to release the pressure of the high-pressure side of the system to the low-pressure side through the pressure relief valve, the system pressure is effectively reduced, the operation stability of the compressor is improved, and the compressor is protected.
Optionally, in the case that the duration is greater than t1, the processor controls the pressure release valve to open, including: after the pressure relief valve is opened for a period of time t2, the processor controls the compressor to reduce the frequency. Therefore, after the processor obtains that the high-pressure side pressure value of the system is greater than the closing pressure value for a duration of t1, the fact that the self-adjustment of the compressor cannot effectively reduce the system pressure at the moment is indicated, the processor controls the pressure release valve to open to release the pressure of the high-pressure side of the system to the low-pressure side through the pressure release valve, after the pressure release valve is opened for a duration of t2, the processor controls the compressor to reduce the frequency to carry out auxiliary pressure reduction on the pressure release valve, the pressure reduction efficiency of the system pressure of the air conditioner is further improved through the two control means of the pressure release valve opening and the compressor frequency reduction, and the load of the compressor is reduced through reducing the frequency of the compressor, so that the running stability of the compressor is further improved, and the compressor is protected.
Optionally, after the pressure release valve is opened for a time period of t2, the processor controls the compressor to reduce frequency, including: after the pressure relief valve is opened for a period of t2, the processor controls the pressure relief valve to relieve pressure according to the current opening, and simultaneously controls the compressor to reduce frequency. Therefore, after the pressure release valve is controlled by the processor to be opened for t2 time, the system pressure is reduced at the moment, so that the pressure in the system and the refrigerating and heating effects of the air conditioner are maintained, the pressure release valve is controlled by the processor to release pressure at the current opening, the opening of the pressure release valve is not required to be increased, the compressor is controlled to reduce the frequency, the exhaust gas quantity is reduced, the exhaust gas temperature is reduced, the system pressure is reduced better, and the system pressure of the air conditioner is reduced efficiently while the refrigerating and heating effects of the air conditioner are ensured.
Optionally, after the pressure release valve is opened for a time period of t2, the processor controls the compressor to reduce frequency, including: the processor controls the compressor to preset amplitude reduction and frequency reduction, meanwhile, the high-pressure side pressure value of the system is obtained, and under the condition that the high-pressure side pressure value of the system is smaller than or equal to the closing pressure value, the processor controls the pressure relief valve to be closed, and the compressor stops frequency reduction. Therefore, after the pressure relief valve is controlled by the processor to be opened for a period of t2, the compressor is controlled by the processor to reduce the frequency by a preset reducing amplitude, so that the stability of the compressor in the process of reducing the frequency is improved, meanwhile, the processor acquires the system high-side pressure value again, the pressure reduction effect of the system pressure is better when the system high-side pressure value is smaller than or equal to the closing pressure value, the pressure relief valve is controlled by the processor to be closed, the compressor stops reducing the frequency, the influence of system pressure reduction on the refrigerating and heating of the air conditioner is reduced, and the system pressure of the air conditioner is better regulated while the refrigerating and heating effects of the air conditioner are guaranteed.
Optionally, the processor controls the compressor to preset the amplitude reduction and frequency reduction, including: the processor controls the compressor to down-convert at a preset down-amplitude of 1Hz every 5 seconds. Therefore, the compressor is enabled to carry out frequency reduction with lower frequency reduction, the stability of the compressor during frequency reduction is improved, the rapid reduction of the refrigerating and heating effects of the air conditioner caused by the great frequency reduction of the compressor is avoided, and the air supply comfort of the air conditioner is improved.
In some specific embodiments, the duration t1 may be 5 seconds and the duration t2 may be 10 seconds; when the air conditioner is a variable-frequency air conditioner, the processor controls the pressure relief valve to be opened when the obtained system high-pressure side pressure value is determined to be larger than the closing pressure value and the duration time is longer than 5 seconds; and after the processor controls the pressure relief valve to be opened for 10 seconds, controlling the pressure relief valve to relieve pressure at the current opening degree, and controlling the compressor to reduce the frequency. Therefore, when the air conditioner is a variable-frequency air conditioner, when the system high-pressure side pressure value of the air conditioner is larger than the closing pressure value, the compressor can conduct self-adjustment, after the duration that the system high-pressure side pressure value of the air conditioner is larger than the closing pressure value lasts for 5 seconds, the self-adjustment of the compressor is proved to be incapable of meeting the requirement of system depressurization, so that the pressure of the high-pressure side in the refrigerating system is depressurized to the low-pressure side by controlling the pressure release valve to be opened, after the pressure release valve is controlled to be opened for 10 seconds, the system pressure is reduced, the compressor is controlled to conduct frequency reduction to assist depressurization, the pressure release valve is controlled to release pressure at the current opening, and meanwhile the compressor is controlled to reduce the frequency, the situation that the pressure in the system is lower due to overlarge opening of the pressure release valve is avoided, so that the refrigerating and heating effects of the air conditioner are affected, the system pressure is better regulated, the operation of the compressor is protected, and the operation stability of the compressor is improved.
In some specific embodiments, the processor controls the relief valve to open, including: the processor controls the pressure relief valve to be opened, and adjusts the opening of the pressure relief valve according to the following formula:
b＝[(P con -P s )/(P o -P s )]*B
wherein B is the opening degree of the relief valve, B is the maximum opening degree of the relief valve, and P con P, the system high side pressure value s For the closing pressure value of the relief valve, P o Is the full-open pressure value of the pressure relief valve and P o >P s . Thus, the processor controls the pressure relief valve to be opened, and determines the opening degree of the pressure relief valve according to the product of the obtained difference value between the system high-pressure side pressure value and the closing pressure value of the pressure relief valve and the product of the ratio of the difference value between the full-opening pressure value of the pressure relief valve and the closing pressure value of the pressure relief valve and the maximum opening degree of the pressure relief valve, so that the opening degree of the pressure relief valve is related to the system high-pressure side pressure value, the closing pressure value of the pressure relief valve, the full-opening pressure value of the pressure relief valve and the maximum opening degree of the pressure relief valve, the opening degree of the pressure relief valve is regulated more accurately, the pressure relief valve can release the system pressure better, the influence of pressure relief on air conditioning, refrigerating and heating can be reduced, the running stability of the compressor is further improved, and the air supply comfort of the air conditioner is improved.
It will be appreciated that the full open pressure value P of the pressure relief valve o Can be preset by the factory of the air conditioner, can be obtained when the high-pressure side pressure of the system reaches the maximum critical value according to the actual working condition of the air conditioner and the operation of the air conditioner, and is characterized in thatThe above formula may be written into the execution program of the processor in advance, and the processor obtains the high-side pressure value P of the system con At the time, P con Substituting the opening b into the above formula to obtain the opening b of the relief valve.
As shown in conjunction with fig. 6, an embodiment of the present disclosure provides a control device for air conditioner pressure relief, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may invoke logic instructions in the memory 101 to execute the control method for air conditioning pressure relief of the above-described embodiments.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by running program instructions/modules stored in the memory 101, i.e., implements the control method for air conditioning pressure relief in the above-described embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
In some embodiments, an air conditioner includes the control device for air conditioner pressure relief.
The embodiment of the disclosure provides a storage medium storing computer executable instructions configured to execute the control method for air conditioner pressure relief.
The storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (6)
1. A control method for air conditioner pressure relief, characterized in that the air conditioner comprises: a compressor (200), wherein a relief valve (600) is communicated between an exhaust pipe and an air return pipe of the compressor (200);
the method comprises the following steps:
acquiring a system pressure value of the air conditioner;
determining a magnitude relationship between the system pressure value and a closing pressure value of the pressure relief valve;
controlling the opening of the pressure relief valve according to the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve;
acquiring a system pressure value of the air conditioner, including: acquiring a system high-pressure side pressure value of the air conditioner;
controlling the opening of the pressure relief valve according to the magnitude relation between the system pressure value and the closing pressure value of the pressure relief valve, comprising: controlling the relief valve to open under the condition that the system high-side pressure value is larger than the closing pressure value;
controlling the relief valve to open if the system high side pressure value is greater than the closing pressure value, comprising: when the air conditioner is a variable-frequency air conditioner, acquiring the time length that the high-pressure side pressure value of the system is larger than the closing pressure value, and controlling the pressure relief valve to be opened when the time length is larger than t 1;
and under the condition that the time period is longer than t1, controlling the pressure release valve to be opened, including: after the pressure release valve is opened for a period of t2, controlling the compressor to reduce the frequency;
and controlling the relief valve to open when the system high side pressure value is greater than the closing pressure value, further comprising: and under the condition that the air conditioner is a constant-frequency air conditioner, controlling the pressure release valve to be opened for pressure release until the opening degree is maximum.
2. The method of claim 1, wherein controlling the opening of the relief valve according to a magnitude relationship between the system pressure value and a closing pressure value of the relief valve further comprises:
and controlling the relief valve to be closed under the condition that the high-side pressure value of the system is smaller than or equal to the closing pressure value.
3. The method of claim 1, wherein controlling the compressor down after the pressure relief valve is open for a period of t2 comprises:
and controlling the compressor to reduce the frequency by a preset reducing amplitude, simultaneously obtaining the high-pressure side pressure value of the system, and controlling the pressure relief valve to be closed under the condition that the high-pressure side pressure value of the system is smaller than or equal to the closing pressure value, wherein the compressor stops reducing the frequency.
4. A method according to any one of claims 1 to 3, wherein controlling the relief valve to open comprises:
and controlling the opening of the pressure relief valve, and adjusting the opening of the pressure relief valve according to the following formula:
b＝[(P con -P s )/(P o -P s )]*B
wherein B is the opening degree of the relief valve, B is the maximum opening degree of the relief valve, and P con P is the system high side pressure value s For the closing pressure value of the relief valve, P o Is the full-open pressure value of the pressure relief valve, and the P o >The P is s 。
5. A control device for air conditioning pressure relief comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for air conditioning pressure relief according to any of claims 1 to 4 when running the program instructions.
6. An air conditioner comprising the control device for air conditioner pressure relief according to claim 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111462526.8A CN114216255B (en) | 2021-12-02 | 2021-12-02 | Control method and device for air conditioner pressure relief and air conditioner |
| PCT/CN2022/102714 WO2023098067A1 (en) | 2021-12-02 | 2022-06-30 | Control method and device for pressure relief of air conditioner, and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111462526.8A CN114216255B (en) | 2021-12-02 | 2021-12-02 | Control method and device for air conditioner pressure relief and air conditioner |
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| CN114216255A CN114216255A (en) | 2022-03-22 |
| CN114216255B true CN114216255B (en) | 2023-10-20 |
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| CN202111462526.8A Active CN114216255B (en) | 2021-12-02 | 2021-12-02 | Control method and device for air conditioner pressure relief and air conditioner |
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| WO (1) | WO2023098067A1 (en) |
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| CN114216255B (en) * | 2021-12-02 | 2023-10-20 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner pressure relief and air conditioner |
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| CN114216255A (en) | 2022-03-22 |
| WO2023098067A1 (en) | 2023-06-08 |
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