CN114459219A - Control method and controller for compressor heating belt and heat pump drying unit - Google Patents

Control method and controller for compressor heating belt and heat pump drying unit Download PDF

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Publication number
CN114459219A
CN114459219A CN202210135581.4A CN202210135581A CN114459219A CN 114459219 A CN114459219 A CN 114459219A CN 202210135581 A CN202210135581 A CN 202210135581A CN 114459219 A CN114459219 A CN 114459219A
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China
Prior art keywords
compressor
heating belt
heat pump
preset
controlling
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Pending
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CN202210135581.4A
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Chinese (zh)
Inventor
卢浩贤
张世航
贺春辉
梁纯龙
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202210135581.4A priority Critical patent/CN114459219A/en
Publication of CN114459219A publication Critical patent/CN114459219A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/04—Heating arrangements using electric heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/22—Tobacco leaves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The application provides a control method of a compressor heating belt, a controller and a heat pump drying unit. The control method provided by the embodiment is suitable for a heat pump drying unit, and the heat pump drying unit comprises: the compressor is arranged on the heating belt on the compressor shell. The method provided by the application is through discerning the operation stage that heat pump drying unit corresponds and the running state of compressor to according to the running state control of the operation stage that heat pump drying unit corresponds and compressor the compressor with opening or closing of heating band can guarantee the necessity that electric heating band opened, compromise energy-conserving performance when guaranteeing compressor reliability operation.

Description

Control method and controller for compressor heating belt and heat pump drying unit
Technical Field
The application relates to the technical field of intelligent control, in particular to a control method and a controller for a compressor heating belt and a heat pump drying unit.
Background
Flue-cured Tobacco (fluecured Tobacco) is prepared by placing mature Tobacco leaves in a curing barn provided with a heat pump drying unit, subjecting the Tobacco leaves to biochemical change under proper temperature and humidity conditions, and drying after the Tobacco leaves turn yellow.
And a compressor is arranged in the heat pump drying unit. When the outdoor environment temperature is lower, the problem that the main engine is difficult to start frequently occurs in the compressor, and the service life of the compressor is seriously influenced. In order to compensate for this drawback, a heating band may be provided to the housing of the compressor, which is inferior to the outdoor ambient temperature at which the compressor operates, thereby ensuring smooth start-up and normal operation of the compressor. Specifically, when the compressor is started, if the outdoor environment temperature is low, the heating belt is started, and the heating belt improves the outdoor environment temperature of the compressor through preheating the compressor shell.
The prior art only judges whether to start the heating belt according to the outer ring temperature, which causes the waste of electric energy, and how to provide an energy-saving heating belt control method becomes a technical problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problems in the prior art, the embodiment of the application shows a control method and a controller for a compressor heating belt and a heat pump drying unit.
According to a first aspect of the embodiments of the present application, there is provided a method for controlling a compressor heating belt, which is applicable to a heat pump dryer group, where the heat pump dryer group includes: a compressor, a heating belt disposed on the compressor housing, the method comprising:
identifying the corresponding operation stage of the heat pump drying unit and the operation state of the compressor; the drying stage comprises a baking period stage in which the heat pump drying unit performs temperature and humidity control according to a drying process and a baking period intermittent stage in which the heat pump drying unit is standby after the baking period stage is completed;
and respectively controlling the opening or closing of the compressor and/or the heating belt according to the corresponding operation stage of the heat pump drying unit and the operation state of the compressor.
With reference to the first implementation manner of the first aspect, the respectively controlling the on or off of the compressor and/or the heating belt according to the operation stage corresponding to the heat pump dryer group and the operation state of the compressor includes:
when the heat pump drying unit operates to the stage of the baking cycle, reading the indication position of the compressor;
if the mark position is a first mark position, obtaining the shutdown time of the compressor, and controlling the heating belt to be opened or closed according to the comparison result of the shutdown time and the preset shutdown time; wherein the first flag is used to indicate that the compressor is in a shutdown state.
With reference to the second implementation manner of the first aspect, the controlling, according to the comparison result between the shutdown duration and the preset shutdown duration, the turning on or off of the heating belt includes:
if the shutdown time is less than or equal to a first preset shutdown time, controlling the heating belt to be closed;
if the shutdown time is longer than a second preset shutdown time, controlling the heating belt to be closed;
if the shutdown time is less than or equal to the second preset shutdown time and greater than the first preset shutdown time, acquiring the outdoor environment temperature; and controlling the compressor and the heating belt to be opened or closed according to a comparison result of the outdoor environment temperature and a preset temperature.
With reference to the third implementation manner of the first aspect, the respectively controlling the on or off of the compressor and/or the heating belt according to the operation stage corresponding to the heat pump dryer group and the operation state of the compressor includes:
when the heat pump drying unit operates to the baking cycle intermittent stage, reading the indication position of the compressor;
if the marking position is a first marking position, controlling the heating belt to be closed; wherein the first flag is used to indicate that the compressor is in a shutdown state.
With reference to the fourth implementation manner of the first aspect, after the reading the flag bit of the compressor, the method further includes:
if the marking position is a second marking position, collecting the outdoor environment temperature;
controlling the compressor and the heating belt to be opened or closed according to a comparison result of the outdoor environment temperature and a preset temperature; wherein the second flag is used to indicate that the compressor is in an operating state.
With reference to the fifth implementation manner of the first aspect, the controlling, according to the comparison result between the outdoor environment temperature and the preset temperature, the turning on or off of the compressor and the heating belt includes:
if the outdoor environment temperature is lower than a first preset temperature, the heating belt and the compressor are sequentially controlled to be started, the running time of the compressor is recorded, and the heating belt is controlled to be closed when the running time reaches a preset running time;
if the outdoor environment temperature is higher than a second preset temperature, controlling the compressor to be started and the heating belt to be closed;
and if the outdoor environment temperature is less than or equal to the second preset temperature and greater than or equal to the first preset temperature, controlling the running states of the compressor and the heating belt to be unchanged.
With reference to the sixth implementation manner of the first aspect, before the identifying the operation phase corresponding to the heat pump dryer group and the operation state of the compressor, the method further includes:
responding to the first power-on of the heat pump drying unit, and collecting outdoor environment temperature;
and controlling the compressor and the heating belt to be opened or closed according to the comparison result of the outdoor environment temperature and the preset temperature.
The control method provided by the embodiment is suitable for a heat pump drying unit, and the heat pump drying unit comprises: the compressor is arranged on the heating belt on the compressor shell. The method provided by the application is through discerning the operation stage that heat pump drying unit corresponds and the running state of compressor to according to the running state control of the operation stage that heat pump drying unit corresponds and compressor the compressor with opening or closing of heating band can guarantee the necessity that electric heating band opened, compromise energy-conserving performance when guaranteeing compressor reliability operation.
A second aspect of the present embodiment provides a heat pump dryer group, including: a controller, a compressor, a heating belt and a temperature sensor disposed on the compressor housing, the controller configured to: the control method of the compressor heating belt provided in the first aspect of the present embodiment is performed.
A third aspect of the present embodiment provides a controller, applied in the heat pump dryer group, where the heat pump dryer group includes: a controller, a compressor, a heating belt and a temperature sensor disposed on the compressor housing, the controller configured to: the control method of the compressor heating belt provided in the first aspect of the present embodiment is performed.
A fourth aspect of the present embodiment provides a computer-readable medium, configured to execute the control method for controlling a compressor heating belt provided in the first aspect of the present embodiment.
Drawings
In order to more clearly illustrate the embodiments of the present application or the implementation manner in the related art, the drawings required for the description of the embodiments or the related art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic diagram of a heat pump dryer set according to a possible embodiment of the present application;
fig. 2 is a flow chart suitable for use in the control method of the heat pump dryer group shown in fig. 1;
fig. 3 is a flowchart of a control method according to a possible embodiment of the present application.
Detailed Description
To make the purpose and embodiments of the present application clearer, the following will clearly and completely describe the exemplary embodiments of the present application with reference to the attached drawings in the exemplary embodiments of the present application, and it is obvious that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.
The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.
The terms "comprises" and "comprising," as well as any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to all of the elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.
The term "module" refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.
The tobacco curing is that the mature tobacco leaves are placed in a curing barn provided with a heat pump drying unit, the proper temperature and humidity conditions are given to enable the components in the tobacco leaves to carry out biochemical change, and the tobacco leaves are dried after becoming yellow. And a compressor is arranged in the heat pump drying unit. When the outdoor environment temperature is lower, the problem that the main engine is difficult to start frequently occurs in the compressor, and the service life of the compressor is seriously influenced. In order to compensate for this drawback, a heating band may be provided to the housing of the compressor, which is inferior to the outdoor ambient temperature at which the compressor operates, thereby ensuring smooth start-up and normal operation of the compressor. Specifically, when the compressor is started, if the outdoor environment temperature is low, the heating belt is started, and the heating belt improves the outdoor environment temperature of the compressor through preheating the compressor shell. In order to solve the above technical problem, a first aspect of an embodiment of the present application provides a method for controlling a heating belt of a compressor, where the method is applied to a heat pump dryer unit, and the heat pump dryer unit includes: the compressor comprises a controller, a compressor, a heating belt and a temperature sensor, wherein the heating belt and the temperature sensor are arranged on a shell of the compressor.
The method provided by the present embodiment will be described below with reference to the specific drawings. Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a heat pump dryer group according to a possible embodiment, and fig. 2 is a flowchart applicable to fig. 1 illustrating a control method of the heat pump dryer group, where the method provided in this embodiment may be applied to a controller in the heat pump dryer group, and the control method of the heat pump dryer group provided in this embodiment may specifically include the following steps S21 to S22.
And S21, identifying the corresponding operation stage of the heat pump drying unit and the operation state of the compressor.
Generally, flue-cured tobacco is a continuous cyclic process, i.e. the baking period, the baking period interval, the baking period and the baking period interval … … are sequentially and circularly performed. The baking period stage refers to a temperature and humidity control stage carried out by the drying unit according to a tobacco baking process, and the baking period intermittent stage refers to a standby stage after the drying unit finishes a baking period, and dry tobacco leaves need to be taken out manually, and wet tobacco leaves are put in for the next baking period. During this process, a compressor shutdown can occur, which is a waste of electrical energy if the heating zones are switched on again in the event of a compressor shutdown.
The method provided by the embodiment is further optimized, and in this embodiment, the operation stage when the heat pump drying unit is in the operation state can be set to include a baking cycle stage in which the heat pump drying unit performs temperature and humidity control according to a drying process, and a baking cycle intermittent stage in which the heat pump drying unit completes standby after the baking cycle stage.
In addition, the operation state of the compressor may include two types, one is a normal operation state, and the other is a shutdown state, which may be a shutdown due to a fault or a shutdown according to a normal operation requirement, which is not limited in this embodiment.
And S22, respectively controlling the opening or closing of the compressor and/or the heating belt according to the corresponding operation stage of the heat pump drying unit and the operation state of the compressor.
After the operation stage corresponding to the heat pump drying unit and the operation state of the compressor are obtained, the opening or closing of the compressor and/or the heating belt can be controlled respectively, so that the compressor and the heating belt can be controlled independently.
Optionally, as shown in fig. 3, the step S22 of controlling the opening or closing of the compressor and/or the heating belt according to the corresponding operation stage of the heat pump dryer group and the operation state of the compressor respectively may further include the following steps a1 to a 2.
A1, when the heat pump dryer group operates to the baking cycle stage, reading the mark position of the compressor.
In this embodiment, the indication position of the compressor specifically includes two identification states, which are a first indication position and a second indication position in this embodiment, where the first indication position is used to represent that the compressor is in a shutdown state, that is, the first indication position is the indication position of the compressor when the compressor is in a fault shutdown state; the second indication position is used for representing that the compressor is in an operation state, namely the second indication position is the indication position of the compressor under the condition that the compressor is in a normal operation state; the embodiment does not limit the patterns of the first indication position and the second indication position, and any indication position that can play a role of identification can be applied to the embodiment as the first indication position or the second indication position.
A2, if the mark position is a first mark position, obtaining the shutdown time of the compressor, and controlling the heating belt to be opened or closed according to the comparison result of the shutdown time and the preset shutdown time; wherein the first flag is used to indicate that the compressor is in a shutdown state.
Optionally, initial shutdown time can be recorded when the compressor responds to shutdown, and shutdown duration is obtained by calculating a difference value between the current time and the initial shutdown time; in this embodiment, the downtime duration is the current time — the initial downtime;
as a feasible implementation manner, the controller may store the preset shutdown time in advance, and close the heating belt when the shutdown time is longer than the preset shutdown time; and starting the heating belt when the shutdown time is less than the preset shutdown time.
As a feasible implementation manner, a first preset shutdown time and a second preset shutdown time which are not zero may also be preset, the second preset shutdown time is longer than the first preset shutdown time, and if the shutdown time is shorter than or equal to the first preset shutdown time, the heating belt is controlled to be closed. And if the shutdown time is longer than the second preset shutdown time, the electric heating belt is disconnected regardless of the outer ring condition.
If the shutdown time is less than or equal to the second preset shutdown time and greater than the first preset shutdown time, controlling the temperature sensor to acquire the outdoor environment temperature; and respectively controlling the compressor and/or the heating belt to be turned on or off according to the comparison result of the outdoor environment temperature and the preset temperature. And if the shutdown time length is higher than the second preset shutdown time length, controlling the heating belt to be closed. The embodiment does not limit specific values of the first preset shutdown time and the second preset shutdown time, and the first preset shutdown time and the second preset shutdown time can be set according to requirements in the process of practical application. For example, in some feasible implementations the first preset shutdown period may be equal to 1 hour (h) and the second preset shutdown period may be equal to 12 hours (h).
The control process described above is described below with reference to specific examples.
In a possible embodiment, the first preset shutdown duration is equal to 1h and the second preset shutdown duration is equal to 12 h. When the controller reads the first marking bit, the controller calculates that the shutdown time length is equal to 30 min, (which is lower than the first preset shutdown time length), and the controller controls the heating belt to be closed.
In a possible embodiment, the first preset shutdown duration is equal to 1h and the second preset shutdown duration is equal to 12 h. When the controller reads the first marking position, the controller calculates that the shutdown time is equal to 1.5h, (the shutdown time is less than or equal to the second preset shutdown time and is greater than the first preset shutdown time), and the controller controls the temperature sensor to acquire the outdoor environment temperature; and respectively controlling the compressor and/or the heating belt to be turned on or off according to the comparison result of the outdoor environment temperature and the preset temperature.
In a possible embodiment, the first preset shutdown duration is equal to 1h and the second preset shutdown duration is equal to 12 h. When the controller reads the first marking position, the controller calculates that the shutdown time length is equal to 13h, (is higher than a second preset shutdown time length), and the controller controls the heating belt to be closed.
Optionally, the step S22 of controlling the compressor and/or the heating belt to be turned on or off according to the operation stage corresponding to the heat pump dryer group and the operation state of the compressor may further include the following steps B1 to B2.
B1, when the heat pump dryer group operates to the baking cycle intermittent stage, reading the indication position of the compressor.
B2, if the mark bit is the first mark bit, controlling the heating belt to be closed; wherein the first flag is used to indicate that the compressor is in a shutdown state.
In the above embodiment, when the heat pump dryer group operates to the intermittent stage of the baking cycle, the compressor is in a shutdown state, and at this time, if the compressor corresponds to the first indication position, it indicates that the heating belt can be directly closed, so as to save energy consumption. In practical application, when the compressor position is stopped due to a fault, the first indication position in the stop state can be also corresponding to the position, that is, the embodiment can also realize the system fault judgment section in the operation process, if the unit is in the baking cycle interval and the system is in the power-on state, when the stop state corresponding to the first indication position corresponding to the compressor position is judged, the heating belt can be directly controlled to be closed. According to the technical scheme provided by the embodiment, the heating belt can be closed under the condition that the compressor is stopped, so that the purpose of saving electric energy is achieved.
In addition to the above description, the case where the compressor has the second indication position, that is, the compressor is in the normal operation state, and the step S22 controlling the compressor and/or the heating belt to be turned on or off according to the operation stage corresponding to the heat pump dryer group and the operation state of the compressor may further include the following steps C1 to C2.
C1, if the mark bit is a second mark bit, collecting the outdoor environment temperature; no matter the heat pump drying unit is in the stage of the baking cycle or the intermittent stage of the baking cycle, if the corresponding mark position of the compressor is the second mark position, the outdoor environment temperature can be collected. In this embodiment, the outdoor ambient temperature may be collected by controlling the temperature sensor.
A temperature sensor (temperature transducer) refers to a sensor that senses temperature and converts it into a usable output signal. May be a contact temperature sensor or a non-contact temperature sensor. It should be noted that, in the present embodiment, the temperature sensor is used for acquiring the outdoor environment temperature, and in order to avoid the problem that the temperature acquired by the temperature sensor is a heating belt, as a feasible implementation manner, the temperature sensor may not contact with the heating belt.
C2, respectively controlling the opening or closing of the compressor and/or the heating belt according to the comparison result of the outdoor environment temperature and the preset temperature; wherein the second flag is used to indicate that the compressor is in an operating state.
In this embodiment, when the compressor can normally operate, whether to start the heating belt and the compressor may be determined in conjunction with the outdoor ambient temperature. In practical applications, there are various implementation manners for respectively controlling the compressor and/or the heating belt to be turned on or off according to a comparison result between the outdoor environment temperature and a preset temperature, and as a feasible implementation manner, the controller may pre-store the preset temperature, and turn off the heating belt when the outdoor environment temperature is higher than the preset temperature; and when the outdoor environment temperature is lower than the preset temperature, the heating belt is started.
As a feasible implementation manner, a first preset temperature and a second preset temperature may be preset, and the second preset temperature is greater than the first preset temperature.
(1) If the outdoor environment temperature is lower than the first preset temperature, the heating belt and the compressor are sequentially controlled to be started, the running time of the compressor is recorded, and the heating belt is controlled to be closed when the running time reaches the preset running time. In practical application, the initial running time can be recorded when the compressor starts to run; calculating the difference between the current time and the initial running time at any time after the compressor starts to run to obtain running time; in this embodiment, the operation duration is the current time — the initial operation time. And if the running time is equal to the preset running time, controlling the heating belt to be closed. The present embodiment does not limit the value of the preset operation time period, for example, in some feasible embodiments, the preset operation time period may be equal to 10 minutes.
(2) And if the outdoor environment temperature is less than or equal to the second preset temperature and greater than or equal to the first preset temperature, respectively controlling the running states of the compressor and the heating belt to be unchanged, namely, the compressor and the heating belt are kept in the current states.
(3) And if the outdoor environment temperature is higher than the second preset temperature, controlling the heating belt to be closed, and only starting the compressor. The embodiment does not limit the specific values of the first preset temperature and the second preset temperature, and the first preset temperature and the second preset temperature can be set according to requirements in the process of practical application. For example, in some feasible implementations the first preset temperature may be equal to 5 degrees celsius and the second preset temperature may be equal to 7 degrees celsius. In this embodiment, the operation strategy after the compressor is turned on may specifically be adaptively set along with the operation stage corresponding to the heat pump dryer group, and this embodiment is not specifically limited.
The control process described above is described below with reference to specific examples.
In a possible embodiment, the first predetermined temperature is equal to 5 degrees celsius and the second predetermined temperature is equal to 7 degrees celsius. When the compressor is started, the outdoor environment temperature collected by the temperature sensor is 3 ℃ (lower than a first preset temperature), the controller controls the compressor and the heating belt to be started, and specifically, the heating belt is started first and then the compressor is started.
In a possible embodiment, the first predetermined temperature is equal to 5 degrees celsius and the second predetermined temperature is equal to 7 degrees celsius. When the air conditioner is started (the heating belt is in a closed state, the compressor is in an open state), the outdoor environment temperature collected by the temperature sensor is 6 degrees centigrade (higher than a first preset temperature but lower than a second preset temperature), the heating belt still keeps in a closed state, and the compressor keeps in an open state.
In a possible embodiment, the first predetermined temperature is equal to 5 degrees celsius and the second predetermined temperature is equal to 7 degrees celsius. When the machine is started (the heating belt is in an open state), the outdoor environment temperature collected by the temperature sensor is 6 ℃ (higher than the first preset temperature but lower than the second preset temperature), and the heating belt still keeps the open state.
In a possible embodiment, the first predetermined temperature is equal to 5 degrees celsius and the second predetermined temperature is equal to 7 degrees celsius. When the compressor is started, the outdoor environment temperature collected by the temperature sensor is 8 ℃ (higher than a second preset temperature), the controller controls the heating belt to be closed, and the compressor is started.
S23, responding to the first power-on of the heat pump drying unit, and collecting outdoor environment temperature;
as a feasible implementation, the controller may collect the outdoor ambient temperature once only upon first power-up during a baking cycle.
As a feasible implementation manner, the temperature sensor is controlled to acquire the outdoor environment temperature according to a preset sampling frequency. After the outdoor environment temperature is collected every time, the controller respectively controls the compressor and/or the heating belt to be turned on or turned off according to the comparison result of the outdoor environment temperature and the preset temperature.
In this embodiment, switching the heat pump drying unit from the power-off state to the power-on state is referred to as first power-on.
S24, controlling the opening or closing of the compressor and the heating belt according to the comparison result of the outdoor environment temperature and the preset temperature. The opening or closing of the compressor and the heating belt is controlled according to the comparison result of the outdoor environment temperature and the preset temperature, which is described in detail in the foregoing, and is not described in detail in this embodiment.
The control method provided by the embodiment is suitable for a heat pump drying unit, and the heat pump drying unit comprises: the compressor comprises a controller, a compressor, a heating belt and a temperature sensor, wherein the heating belt and the temperature sensor are arranged on a shell of the compressor. When the heat pump drying unit is powered on for the first time, the controller controls the temperature sensor to collect outdoor environment temperature, and the compressor and/or the heating belt are controlled to be turned on or turned off respectively according to the comparison result of the outdoor environment temperature and the preset temperature; meanwhile, after the compressor and the heating belt are respectively controlled, the running time of the compressor is counted, if the running time of the compressor is equal to the preset running time, the compressor is indicated to start to normally run, and the controller controls the heating belt to be closed under the condition. The control method of the compressor heating belt provided by the embodiment can ensure the necessity of starting the electric heating belt, and can ensure the reliable operation of the compressor and simultaneously give consideration to the energy-saving performance.
In practical applications, there are various ways to control the on or off of the compressor and the heating belt. As a feasible implementation manner, the heating belt and the compressor can be respectively connected with the control switch, and the controller can control the on or off of the heating belt and the compressor by controlling the on or off of the control switch; for example, if the controller controls the control switch to be connected, the heating belt is turned on, and accordingly, the heating belt can release heat to change the temperature of the environment; and the controller controls the control switch to be switched off, so that the heating belt is switched off, and correspondingly, the heating belt cannot release heat to change the temperature of the environment. As a feasible implementation manner, the controller can directly utilize the pins to be respectively connected with the heating belt and the compressor, and the controller can respectively control the heating belt and the compressor to be switched on or switched off through the output potential of the pins; for example, the controller outputs a high potential through the pin, the heating band is turned on, and accordingly, the heating band can release heat to change the temperature of the environment; the controller outputs a low potential through the pins, the heating band is closed, and correspondingly, the heating band cannot release heat to change the temperature of the environment. The present embodiment is merely an exemplary description of two implementation manners for controlling the on or off of the compressor and the heating belt, and the implementation manners are not limited thereto, and the implementation manners for controlling the on or off of the compressor and the heating belt in the practical application process may be, but are not limited to, the above two implementation manners.
For a heat pump drying unit, a compressor system of the heat pump drying unit is provided with an electric heating belt, when the ambient temperature is low, the heating state of a heat pump of the compressor often causes the starting of a host machine to be difficult or a long severe working state is required even if the host machine is started reluctantly, so the service life of the compressor is seriously influenced. In order to compensate for the defect, an auxiliary electric heating belt (wire) is the best choice for solving the problem, but the product design requires that the electric heating belt can guarantee the reliable operation of the compressor and simultaneously the energy-saving operation effect can be considered. The proposal provides a novel energy-saving control method for an electric heating belt of a compressor, which is applicable to a heat pump drying unit with double compressors, abandons the control idea that the traditional compressor only considers the outer ring temperature to judge whether to open or not, distinguishes the running state of the compressor, manages the time of a baking period and a non-baking period, discriminates and judges the necessity of opening the electric heating belt of the compressor, ensures the reliable running of the compressor, gives consideration to the energy-saving running, preheats the shell of the compressor for a short time under the condition of ensuring the energy-saving, better improves the working environment temperature of the compressor, and further ensures the smooth starting and normal running of the compressor.
The embodiment provides a control method of a compressor heating belt, which is applicable to a double-compressor heat pump drying unit, abandons the control idea that whether a traditional compressor is started or not is judged only by considering the temperature of an outer ring, distinguishes the running state of the compressor, manages the time of a baking period and a non-baking period, discriminates and judges the necessity of starting the compressor electric heating belt, ensures the reliable running of the compressor, and simultaneously considers the energy-saving running.
A second aspect of the present embodiment provides a heat pump dryer group, including: a controller, a compressor, a heating belt and a temperature sensor disposed on the compressor housing, the controller configured to: the control method provided by the present embodiment is executed.
A third aspect of the present embodiment provides a controller, for use in a heat pump drying unit, where the heat pump drying unit includes: a controller, a compressor, a heating belt and a temperature sensor disposed on the compressor housing, the controller configured to: the control method provided by the embodiment is executed.
A fourth aspect of the present embodiment provides a computer-readable medium configured to execute the control method provided by the present embodiment.
Those skilled in the art will recognize that the prior art has advanced to the following levels: the differences between hardware and software implementations of various aspects of the system are small, and the use of hardware or software is often (but not always, so that in some circumstances it becomes important to choose either hardware or software) a design choice that trades off cost against efficiency. Those skilled in the art will appreciate that there are many means (e.g., hardware, software, and/or firmware) by which the processes and/or systems and/or other techniques herein can be implemented, and that the preferred means will vary with the environment in which the processes and/or systems and/or other techniques are deployed.
It will be appreciated by those of ordinary skill in the art that all or a portion of the subject matter of the present application may be implemented in software, in combination with hardware and/or firmware. For example, the subject matter described herein may be implemented in software executed by one or more processors. In one exemplary embodiment, the subject matter described herein may be implemented using a non-transitory computer-readable medium having stored thereon computer-executable instructions that, when executed by a computer processor, control the computer to perform steps. Example computer readable media suitable for implementing the subject matter described herein include non-transitory computer readable media such as disk memory devices, chip memory devices, programmable logic devices, and application specific integrated circuits. In addition, a computer-readable medium embodying the subject matter described herein may be located on a single device or computing platform or may be distributed across multiple devices or computing platforms.
Finally, it should be understood that the above embodiments are for illustration only and are not limited to the technical solutions of the present application. While the present application has been described in detail with reference to the preferred embodiments, it should be understood that various changes, modifications and equivalents may be made by those skilled in the art without departing from the scope of the present application and the appended claims.

Claims (10)

1. A control method of a compressor heating belt is suitable for a heat pump drying unit, and the heat pump drying unit comprises the following steps: a compressor, a heating belt disposed on a shell of the compressor, the method comprising:
identifying the corresponding operation stage of the heat pump drying unit and the operation state of the compressor; the operation stages corresponding to the heat pump drying unit comprise a baking period stage for the heat pump drying unit to control the temperature and the humidity according to a drying process and a baking period intermittent stage for the heat pump drying unit to stand by after the baking period stage is finished;
and respectively controlling the opening or closing of the compressor and/or the heating belt according to the corresponding operation stage of the heat pump drying unit and the operation state of the compressor.
2. The control method according to claim 1, wherein the controlling the on or off of the compressor and/or the heating belt according to the corresponding operation stage of the heat pump dryer group and the operation state of the compressor respectively comprises:
when the heat pump drying unit operates to the stage of the baking cycle, reading the mark position of the compressor;
if the mark position is a first mark position, obtaining the shutdown time of the compressor, and controlling the heating belt to be opened or closed according to the comparison result of the shutdown time and the preset shutdown time; wherein the first flag is used for indicating that the compressor is in a shutdown state.
3. The control method of claim 2, wherein the controlling the heating belt to be turned on or off according to the comparison result of the shutdown duration and a preset shutdown duration comprises:
if the shutdown time is less than or equal to a first preset shutdown time, controlling the heating belt to be closed;
if the shutdown time is longer than a second preset shutdown time, controlling the heating belt to be closed;
if the shutdown time is less than or equal to the second preset shutdown time and greater than the first preset shutdown time, acquiring the outdoor environment temperature; and controlling the compressor and the heating belt to be opened or closed according to the comparison result of the outdoor environment temperature and the preset temperature.
4. The control method according to claim 1, wherein the controlling the on or off of the compressor and/or the heating belt according to the corresponding operation stage of the heat pump dryer group and the operation state of the compressor respectively comprises:
when the heat pump drying unit operates to the baking cycle intermittent stage, reading the indication position of the compressor;
if the marking position is a first marking position, controlling the heating belt to be closed; wherein the first flag is used to indicate that the compressor is in a shutdown state.
5. The control method according to any one of claims 2 to 4, wherein after reading the flag of the compressor, the method further comprises:
if the marking position is a second marking position, collecting the outdoor environment temperature;
controlling the compressor and the heating belt to be opened or closed according to a comparison result of the outdoor environment temperature and a preset temperature; wherein the second flag is used to indicate that the compressor is in an operating state.
6. The control method of claim 5, wherein the controlling the turning on or off of the compressor and the heating belt according to the comparison result of the outdoor environment temperature and a preset temperature comprises:
if the outdoor environment temperature is lower than a first preset temperature, the heating belt and the compressor are sequentially controlled to be started, the running time of the compressor is recorded, and the heating belt is controlled to be closed when the running time reaches a preset running time;
if the outdoor environment temperature is higher than a second preset temperature, controlling the compressor to be started and the heating belt to be closed;
and if the outdoor environment temperature is less than or equal to the second preset temperature and greater than or equal to the first preset temperature, controlling the running states of the compressor and the heating belt to be unchanged.
7. The method of any of claims 1-4, wherein prior to identifying the operating phase corresponding to the heat pump dryer group and the operating state of the compressor, the method further comprises:
responding to the first power-on of the heat pump drying unit, and collecting outdoor environment temperature;
and controlling the compressor and the heating belt to be opened or closed according to the comparison result of the outdoor environment temperature and the preset temperature.
8. A heat pump dryer group, the heat pump dryer group comprising: a controller, a compressor, a heating belt and a temperature sensor disposed on the compressor housing, wherein the controller is configured to: a method of controlling a compressor heating zone according to any one of claims 1 to 7.
9. A controller for use in a heat pump dryer assembly, the heat pump dryer assembly comprising: controller, compressor, heating belt and temperature sensor set on the shell of the compressor, characterized in that it is configured to execute the control method of the compressor heating belt according to any one of claims 1 to 7.
10. A computer-readable medium, characterized by being configured to execute the control method of the compressor heating band according to any one of claims 1 to 7.
CN202210135581.4A 2022-02-14 2022-02-14 Control method and controller for compressor heating belt and heat pump drying unit Pending CN114459219A (en)

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