CN112797584A - Energy-saving control method and device for roof machine and electronic equipment - Google Patents
Energy-saving control method and device for roof machine and electronic equipment Download PDFInfo
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- CN112797584A CN112797584A CN202110018680.XA CN202110018680A CN112797584A CN 112797584 A CN112797584 A CN 112797584A CN 202110018680 A CN202110018680 A CN 202110018680A CN 112797584 A CN112797584 A CN 112797584A
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F2110/10—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to a roof-top machine energy-saving control method. The method comprises the following steps: detecting the operation mode of the roof machine; if the operation mode is the temperature regulation mode, acquiring the room environment temperature and the temperature set by the user; comparing the first temperature difference with a second temperature difference, wherein the first temperature difference is a temperature difference value between the room environment temperature and the temperature set by the user, and the second temperature difference is a preset temperature difference threshold value; according to the contrast result of first difference in temperature and second difference in temperature, confirm the open and close state of pressure release bypass blast gate, pressure release bypass blast gate is used for adjusting the built-in flow resistance of roof machine, and the open and close state includes: closed state and degree of opening. The scheme that this application provided can effectively adjust the built-in flow resistance of roof machine, promotes the operating efficiency of roof machine.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an energy-saving control method for a roof-top machine.
Background
The roof machine is provided with a filtering section, a refrigerating section, a heating section, a water retaining section, a humidifying section, a blower section and other complex multifunctional system sections in the roof machine, air can be sent out of the roof machine only by overcoming a plurality of resistance parts such as an evaporator, a water baffle and the like, the resistance in the roof machine is very large, the pressure loss in the roof machine is increased, the high-load operation of a fan and a matched motor is caused, the power waste is large, more equipment loss is brought, the service lives of the fan and the motor are reduced, especially when the rotating speed of the fan is adjusted during the frequency conversion comfort cooling (heating) period of the roof machine set, the influence on the resistance in the roof machine is not fully considered, the fan is caused to deviate from the optimal efficiency point to operate, the low-efficiency operation is caused, the power waste is large.
In the prior art, in patent (blower and roof machine) with publication number CN108626148B, a method for improving the operation efficiency of a blower is proposed, which deflects an air outlet by a certain angle, so that airflow can be diffused to a certain extent at the air outlet, which is beneficial to converting dynamic pressure energy into static pressure energy.
The above prior art has the following disadvantages:
the scheme of the prior art only optimizes the deflection angle of the air outlet, does not consider the regulation of the flow resistance in the roof-top machine by controlling the opening and closing states of the pressure relief bypass air valve, does not solve the problem fundamentally, still easily causes the increase of the pressure loss in the roof-top machine, leads to the reduction of the converted static pressure energy, increases the power consumption of the unit operation, and leads to the fan of the roof-top machine to be still in the low-efficiency operation state.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides an energy-saving control method and device for a roof machine, and the energy-saving control method and device for the roof machine can effectively adjust the flow resistance in the roof machine, reduce the pressure loss in the roof machine, improve the operation efficiency of a fan and achieve the energy-saving effect.
The application provides a roof machine energy-saving control method in a first aspect, which comprises the following steps:
detecting the operation mode of the roof machine;
if the operation mode is the temperature regulation mode, acquiring the room environment temperature and the temperature set by the user;
comparing the first temperature difference with a second temperature difference, wherein the first temperature difference is a temperature difference value between the room environment temperature and the temperature set by the user, and the second temperature difference is a preset temperature difference threshold value;
according to the contrast result of first difference in temperature and second difference in temperature, confirm the open and close state of pressure release bypass blast gate, pressure release bypass blast gate is used for adjusting the built-in flow resistance of roof machine, and the open and close state includes: closed state and degree of opening.
In an embodiment, determining the open/close state of the pressure relief bypass damper according to the comparison result of the first temperature difference and the second temperature difference includes:
when the first temperature difference is smaller than the second temperature difference, determining the opening degree of the pressure relief bypass air valve according to the first temperature difference and the second temperature difference;
and when the first temperature difference is larger than the second temperature difference, controlling the opening and closing state of the pressure relief bypass air valve to be a closed state.
In an embodiment, determining the opening degree of the pressure relief bypass damper according to the first temperature difference and the second temperature difference comprises:
and calculating a first opening according to the first temperature difference and the second temperature difference, and adjusting the opening degree of the pressure relief bypass air valve according to the calculation result of the first opening.
In an embodiment, calculating the first opening degree according to the first temperature difference and the second temperature difference includes:
calculating the first opening degree by formula a, wherein formula a is:
wherein, M1 is the first opening, Tf is the room ambient temperature, Ts is the user-set room temperature, and Δ T is the second temperature difference.
In an embodiment, the adjusting of the opening degree of the relief bypass damper according to the calculation result of the first opening degree includes:
controlling a ventilation valve motor to adjust the deflection angle of the air guide vane of the pressure relief bypass air valve according to the calculation result of the first opening, wherein the ventilation valve motor is a device for controlling the deflection of the air guide vane, and the deflection angle of the air guide vane is calculated through a formula B, and the formula B is as follows:
B：α＝0.9M1
wherein, α is the deflection angle of the air guide blade, and M1 is a first opening;
the deflection angle of the air guide blade ranges from 0 degree to 90 degrees.
In an embodiment, the adjusting the opening degree of the relief bypass damper according to the calculation result of the first opening degree includes:
and calculating a first rotating speed according to the first opening, the preset rated operating rotating speed of the fan and the preset lowest operating rotating speed of the fan, wherein the first rotating speed is a target operating rotating speed after the fan is adjusted.
In an embodiment, calculating the first rotation speed according to the first opening, the preset rated operation rotation speed of the fan and the preset minimum operation rotation speed of the fan includes:
calculating a first rotation speed by formula B:
B：N3＝N1-M1*(N1-N4)
wherein, N3 is a first rotation speed, N1 is a preset rated operation rotation speed of the fan, M1 is a first opening degree, and N4 is a preset minimum operation rotation speed of the fan.
In an embodiment, after calculating the first rotation speed according to the first opening, the preset rated operation rotation speed of the fan and the preset lowest operation rotation speed of the fan, the method includes:
and controlling the running rotating speed of the fan to be adjusted from the preset rated running rotating speed of the fan to the first rotating speed according to the calculation result of the first rotating speed.
In one embodiment, after controlling the open/close state of the relief bypass damper to the closed state, the method includes:
and controlling the current running speed of the fan to maintain the preset rated running speed of the fan.
In an embodiment, before acquiring the room ambient temperature and the user-set temperature, the method includes:
the operation time of the roof machine in the temperature adjusting mode reaches a first time, and whether the roof machine normally operates is detected;
and when the normal operation of the roof machine is detected, executing the step of acquiring the room environment temperature and the temperature set by the user.
In one embodiment, if the operation mode is the ventilation and purification mode, before determining the opening and closing state of the pressure relief bypass air valve, the method comprises the following steps of;
detecting a first negative pressure through a pressure sensor, wherein the first negative pressure is the built-in negative pressure when the running time of the roof machine reaches a second time and a pressure relief bypass air valve is in a closed state in a ventilation and purification mode, and the built-in negative pressure is the surface pressure of built-in devices of the roof machine;
and comparing the first negative pressure with a second negative pressure, wherein the second negative pressure is a preset built-in negative pressure fluctuation range when the roof machine normally operates.
In one embodiment, comparing the first negative pressure with the second negative pressure comprises:
if the first negative pressure is matched with the second negative pressure, the roof machine normally operates, and the pressure sensor triggers the roof machine controller to execute instruction sending;
if the first negative pressure is not matched with the second negative pressure, the roof machine is abnormally operated, and the roof machine is controlled to stop.
In one embodiment, triggering the rooftop controller to execute the command transmission comprises:
the rooftop machine controller sends an instruction to the vent valve motor, and the vent valve motor adjusts the opening degree of the pressure relief bypass air valve to the maximum according to the instruction.
In one embodiment, adjusting the opening degree of the pressure relief bypass air valve to the maximum comprises:
the deflection angle of the air guide vane of the pressure relief bypass air valve is adjusted to 90 degrees.
In one embodiment, after adjusting the maximum opening degree of the pressure relief bypass air valve, the method comprises the following steps:
and controlling the running speed of the fan to be adjusted to a second speed from the rated running speed of the fan, wherein the second speed is the preset running speed of the fan in the ventilation and purification mode.
The second aspect of the present application provides a roof-top machine energy-saving control device, including:
an operation mode detection unit for detecting an operation mode of the roof machine;
the temperature data acquisition unit is used for acquiring the room environment temperature and the temperature set by the user;
the data comparison unit is used for comparing a first temperature difference with a second temperature difference, wherein the first temperature difference is a temperature difference value between the room environment temperature and the temperature set by the user, and the second temperature difference is a preset temperature difference threshold value;
and the control processing unit is used for determining the opening and closing states of the pressure relief bypass air valve according to the first temperature difference and the second temperature difference.
A third aspect of the present application provides an electronic device comprising:
a processor; and
a memory having executable code stored thereon, which when executed by the processor, causes the processor to perform the method as described above.
A fourth aspect of the present application provides a non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to perform a method as described above.
The technical scheme provided by the application can comprise the following beneficial effects:
detect roof machine operational mode, when the operational mode is temperature regulation mode, room ambient temperature and user's settlement temperature according to acquireing obtain the first difference in temperature, contrast through first difference in temperature and difference in temperature threshold value, confirm the open and close state of pressure release bypass air valve according to the contrast result, reach the effect of the built-in flow resistance who adjusts the roof machine through control pressure release bypass air valve open and close state, compared with the prior art, the technical scheme that this application provided more can reduce built-in pressure loss, and then increase the static pressure energy of conversion, reduce unit operation consumption, promote roof machine fan operating efficiency.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
Fig. 1 is a schematic flow chart of an embodiment of a roof-top machine energy-saving control method in an embodiment of the present application;
FIG. 2 is a schematic flow chart of an embodiment of the energy-saving control method for the roof-top machine in the embodiment of the present application;
FIG. 3 is a schematic flow chart of an embodiment of a roof-top machine energy-saving control method in the embodiment of the present application;
fig. 4 is a schematic flow chart of a fourth embodiment of the energy-saving control method for the roof-top machine in the embodiment of the present application;
FIG. 5 is a schematic structural diagram of an energy-saving control device of a rooftop machine in an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device shown in an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
The roof machine is provided with a filtering section, a refrigerating section, a heating section, a water retaining section, a humidifying section, a blower section and other complex multifunctional system sections in the roof machine, air can be sent out of the roof machine only by overcoming a plurality of resistance parts such as an evaporator, a water baffle and the like, the resistance in the roof machine is very large, the pressure loss in the roof machine is increased, the high-load operation of a fan and a matched motor is caused, the power waste is large, more equipment loss is brought, the service lives of the fan and the motor are reduced, especially when the rotating speed of the fan is adjusted during the frequency conversion comfort cooling (heating) period of the roof machine set, the influence on the resistance in the roof machine is not fully considered, the fan is caused to deviate from the optimal efficiency point to operate, the low-efficiency operation is caused, the power waste is large. In the prior art, a method for improving the operating efficiency of a fan is provided, and an air outlet is deflected by a certain angle, so that air flow can be diffused to a certain degree at the air outlet, and dynamic pressure energy can be converted into static pressure energy. However, the above prior art scheme only optimizes the deflection angle of the air outlet, does not consider adjusting the flow resistance in the rooftop machine by controlling the open/close state of the pressure relief bypass damper, does not solve the problem fundamentally, still easily causes the increase of pressure loss in the rooftop machine, leads to the reduction of converted static pressure energy, increases the power consumption of the unit operation, and keeps the rooftop machine fan in the low-efficiency operation state.
In view of the above problems, the embodiments of the present application provide an energy-saving control method for a roof machine, which can effectively adjust the flow resistance in the roof machine, reduce the pressure loss in the roof machine, improve the operation efficiency of the fan, and achieve the energy-saving effect.
The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the energy saving control method for a roof-top machine in the embodiment of the present application includes:
101. detecting the operation mode of the roof machine;
the roof machine is a roof type air conditioning unit, which is a large and medium-sized integral air conditioning device with a cold source and air cooling, and the large and medium-sized integral air conditioning device is assembled in a horizontal box body for refrigeration, heating, humidification, air supply, air purification, electrical control and the like, and is called the roof type air conditioning unit because the roof machine is mostly installed on a roof, and the main components of the roof type air conditioning unit include but are not limited to: the device comprises a unit shell, an air inlet, a coarse filter, a medium-efficiency filter, an evaporator partition plate, a finned heat exchanger, a water baffle, a pressure sensor, a three-phase asynchronous motor, a centrifugal fan, an air supply outlet and the like. Air is sucked from the air inlet, circulates a series of complex machine set components, and the processed air is sent out from the air supply port.
The detection of the operation mode may be realized by means of a relay or the like. A relay is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount (excitation amount) meets a predetermined requirement. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.
The relay is an essential element of the air conditioning equipment, and the relay controls the controlled circuit to be turned on or off by inputting variables such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light and the like required by regulations to the relay, so as to further control an actuating mechanism, wherein the actuating mechanism comprises but is not limited to a compressor, a fan, a refrigerating or heating device and the like in the air conditioning equipment.
According to the working principle of the relay, in the embodiment of the application, the communication condition of the controlled circuit in the air conditioning equipment can be judged by detecting the working state of the relay, so that the running mode of the air conditioning equipment is judged.
It will be appreciated that in practical applications, the detection of the operation mode of the rooftop machine can be realized by other methods, and the above detection method using the relay is only exemplary and should not be taken as the only limitation of the detection method of the operation mode of the rooftop machine.
102. If the operation mode is the temperature regulation mode, acquiring the room environment temperature and the temperature set by the user;
the temperature adjusting mode includes, but is not limited to, a cooling mode and a heating mode, and when the air conditioner operates in these modes, filtered air needs to be subjected to heat exchange treatment by the fin heat exchanger and then is sent out through the air outlet.
Acquiring the room ambient temperature can be realized by a temperature sensor. The temperature sensor refers to a sensor capable of sensing temperature and converting the sensed temperature into a usable output signal, and it is understood that the type of the temperature sensor is not limited in the embodiment of the present application, and an appropriate temperature sensor may be selected according to actual applications. It will also be understood that in practical applications, the detection of the room ambient temperature can also be realized by other methods, and the above detection method using the temperature sensor is only exemplary and should not be taken as the only limitation of the room ambient temperature detection method.
The user setting temperature means that a user inputs set temperature information to the rooftop machine through a remote controller or other modes according to autonomous requirements, and the rooftop machine is made to execute a corresponding control strategy to enable the room environment temperature to be close to the set temperature of the user continuously.
103. Comparing the first temperature difference with the second temperature difference;
the first temperature difference is defined as a temperature difference between the room environment temperature and the temperature set by the user, and the specific calculation method is to subtract the value of the user set temperature from the obtained value of the room environment temperature and then take an absolute value, so that the difference between the actual room environment temperature and the temperature set by the user can be reflected.
In the embodiment of the application, a temperature difference threshold value between the room environment temperature and the temperature set by the user under the condition that the roof machine normally operates is preset, namely the definition of a second temperature difference, namely the actual room environment temperature is judged to have a larger difference with the temperature set by the user if the first temperature difference is larger than the second temperature difference by default, and the fin heat exchanger is required to be controlled to keep the maximum heat exchange state; if the first temperature difference is smaller than the second temperature difference, the actual room environment temperature and the temperature set by the user are judged to be within the reasonable difference, and the fin heat exchanger does not need to be controlled to continue to keep the maximum heat exchange state.
104. Determining the opening and closing state of the pressure relief bypass air valve according to the comparison result of the first temperature difference and the second temperature difference;
the pressure relief bypass air valve comprises but is not limited to a vent valve motor, air guide blades and an air guide connecting rod. When the pressure relief bypass air valve works, the vent valve motor receives an instruction of a roof machine controller, starts to operate, drives the air guide connecting rod to transversely operate, and then drives the air guide blades to deflect at an angle, so that the vent valve has the function of ventilation and pressure relief, and the effect of reducing the flow resistance in the machine is achieved. The opening and closing states of the pressure relief bypass air valve comprise a closing state and an opening degree, wherein the closing state means that an air guide blade of the pressure relief bypass air valve is tightly closed, so that air is prevented from passing through the pressure relief bypass air valve; the opening degree refers to the opening degree of the air guide blade of the pressure relief bypass air valve, so that the flow of air passing through the pressure relief bypass air valve is controlled. The opening and closing state of the pressure relief bypass air valve is determined by the comparison result of the first temperature difference and the second temperature difference.
The following beneficial effects can be seen from the first embodiment:
detect roof machine operational mode, when the operational mode is temperature regulation mode, room ambient temperature and user's settlement temperature according to acquireing obtain the first difference in temperature, contrast through first difference in temperature and difference in temperature threshold value, confirm the open and close state of pressure release bypass air valve according to the contrast result, reach the effect of the built-in flow resistance who adjusts the roof machine through control pressure release bypass air valve open and close state, compared with the prior art, the technical scheme that this application provided more can reduce built-in pressure loss, and then increase the static pressure energy of conversion, reduce unit operation consumption, promote roof machine fan operating efficiency.
Example two
In order to facilitate understanding, an embodiment of an energy-saving control method for a roof-top machine is provided below for explanation, in practical application, in a temperature regulation mode, the efficiency point of the roof-top machine fan is often influenced by the flow resistance in the roof-top machine to deviate from an optimal state, and in order to solve the above problem, the opening and closing state and the opening degree of the pressure relief bypass air valve can be controlled according to a first temperature difference and a second temperature difference between the room environment temperature and the user preset temperature, so that the effect of regulating the flow resistance in the roof-top machine is achieved, and the influence of the flow resistance in the roof-top machine on the fan efficiency. Referring to fig. 2, an embodiment of a roof-top machine energy-saving control method in an embodiment of the present application includes:
201. if the operation mode is the temperature regulation mode, acquiring the room environment temperature and the temperature set by the user;
before acquiring the room environment temperature and the user-set temperature, the running time of the rooftop machine in the temperature regulation mode needs to reach the first time length so as to detect whether the rooftop machine normally runs, and specifically, the judgment can be carried out by detecting the pressure in the rooftop machine.
It is understood that the first time period can be set according to the requirements of the practical application, and is not limited herein.
It will also be appreciated that in practice, the method of detecting the pressure within the rooftop machine may be performed in different ways, and is merely exemplary and should not be taken as the only limitation of the method of detecting whether the rooftop machine is operating properly.
When the normal operation of the roof machine is determined, the steps of acquiring the room environment temperature and the temperature set by the user can be started.
202. Comparing the first temperature difference with the second temperature difference;
in the embodiment of the present application, the specific content of step 202 is similar to that of step 103 in the first embodiment, and is not described herein again.
203. Determining the opening and closing state of the pressure relief bypass air valve according to the comparison result of the first temperature difference and the second temperature difference;
when the first temperature difference is smaller than the second temperature difference, the room environment temperature basically reaches the temperature preset by a user, the maximum heat exchange state is not required to be kept, the pressure relief bypass air valve can be controlled to be opened, the air flow passing through the pressure relief bypass air valve is adjusted through the air guide blades, the air flow passing through the fin heat exchange and the water baffle is reduced, the flow resistance in the machine is reduced, and the integral flow pressure loss in the machine is reduced.
Specifically, the air purified by filtering is divided into two parts and passes through the heat exchange device, one part does not pass through the pressure relief bypass air valve through heat exchange, the other part passes through the fin heat exchanger after heat exchange, and the two parts of air can still achieve the temperature adjusting effect after being mixed. Because a part of air is removed at the pressure relief bypass air valve, the pressure loss caused by the resistance of the fin heat exchanger when the rest part of air passes through the fin heat exchanger is reduced compared with the original pressure loss, and the effect of reducing the pressure loss of the whole flow in the machine is achieved.
When the first temperature difference is larger than the second temperature difference, the room environment temperature is different from the temperature preset by a user, the maximum heat exchange state needs to be kept, the room environment temperature is rapidly adjusted, and the opening and closing state of the pressure relief bypass air valve is controlled to be the closing state, so that the filtered and purified air is completely subjected to heat exchange through the fin heat exchanger.
204. Calculating a first opening degree of the pressure relief bypass air valve according to the first temperature difference and the second temperature difference;
after the pressure relief bypass air valve is determined to be opened, the opening degree of the pressure relief bypass air valve needs to be further determined so as to achieve the effect of accurately adjusting the flow resistance in the air conditioner. First, the first opening degree of the pressure relief bypass air valve needs to be calculated.
The first opening degree can be understood as the proportion of the opening of the air guide vane in the pressure relief bypass air valve, and is calculated according to the proportion of the first temperature difference to the second temperature difference, and exemplarily:
the first opening degree may be calculated according to the following formula:
wherein, M1 is the first opening, Tf is the room ambient temperature, Ts is the user-set room temperature, and Δ T is the second temperature difference.
It will be appreciated that in practical applications, the calculation of the opening of the pressure relief bypass damper may be implemented in other ways, and the above description of the algorithm is only exemplary and should not be taken as the only limitation to the calculation of the opening of the pressure relief bypass damper.
205. Adjusting the deflection angle of the air guide blade of the pressure relief bypass air valve according to the first opening degree;
according to the calculation result of the first opening, controlling a motor of the vent valve to adjust the deflection angle of the air guide vane of the pressure relief bypass air valve, wherein the deflection angle of the air guide vane is calculated according to the first opening, and exemplarily:
the deflection angle of the air guide blade can be calculated according to the following formula:
α＝0.9M1
wherein α is a deflection angle of the air guide blade, and M1 is a first opening degree.
It is understood that, in practical applications, the calculation of the deflection angle of the wind guide blade may be implemented by other methods, and the above description of the algorithm is only exemplary and should not be taken as the only limitation of the calculation of the deflection angle of the wind guide blade.
The opening degree of the pressure relief bypass air valve is reflected by the deflection angle of the air guide vane, the value range of the deflection angle of the air guide vane is 0-90 degrees, when the deflection angle of the air guide vane is 0 degrees, the pressure relief bypass air valve is in a closed state, and when the deflection angle of the air guide vane is 90 degrees, the pressure relief bypass air valve is in a state with the maximum opening degree.
The following beneficial effects can be seen from the second embodiment:
when the operation mode is the temperature regulation mode, obtain first difference in temperature according to room ambient temperature and the user's temperature that acquires, contrast through first difference in temperature and difference in temperature threshold value, confirm the open-close state of pressure release bypass air valve according to the contrast result, confirm that pressure release bypass air valve opens the back, confirm the degree of opening of pressure release bypass air valve through calculating the first aperture of pressure release bypass air valve and wind-guiding blade deflection angle, reach the effect of carrying out accurate regulation to the flow resistance in the machine. Compared with the prior art, the technical scheme that this application provided can be more intelligently according to the running state regulation built-in flow resistance of roof machine difference, reduces built-in pressure loss, and then increases the static pressure energy of conversion, reduces the unit operation consumption, promotes roof machine fan operating efficiency.
EXAMPLE III
In practical application, in a temperature regulation mode, after the two steps of the embodiment are completed, the operation rotating speed of the fan of the rooftop machine is dynamically regulated according to the regulation condition of the flow resistance in the rooftop machine, so that the fan of the rooftop machine operates at the optimal efficiency point, and the effects of saving energy, reducing consumption and prolonging the service life of the fan of the rooftop machine are achieved. Referring to fig. 3, an embodiment of a roof-top machine energy-saving control method in an embodiment of the present application includes:
301. calculating a first rotating speed according to the first opening, the preset rated operating rotating speed of the fan and the preset lowest operating rotating speed of the fan;
the first opening degree is the first opening degree described in the second embodiment, and it can be understood that when the first opening degree is larger, the larger the deflection angle of the air guide blade is, and further, the larger the opening degree of the pressure relief bypass air valve is, the larger the flow of the filtered air passing through the pressure relief bypass air valve is, the more the flow resistance in the air conditioner is obviously reduced, and further, the condition that the first opening degree can reflect the regulation of the flow resistance in the air conditioner is described.
The preset rated operation rotating speed of the fan is defined as the operation rotating speed of the roof machine which normally operates under rated power after the roof machine is started.
The preset lowest operation rotating speed of the fan is defined as the preset operation rotating speed when the pressure relief side ventilation valve is opened to the maximum corresponding rated air volume static pressure.
The first rotational speed is defined as a target operating rotational speed after the fan is adjusted.
For example, the first rotational speed may be calculated according to the following formula:
N3＝N1-M1*(N1-N4)
wherein, N3 is a first rotation speed, N1 is a preset rated operation rotation speed of the fan, M1 is a first opening degree, and N4 is a preset minimum operation rotation speed of the fan.
It will be appreciated that in practical applications, the calculation of the target operating speed of the fan may be implemented by other methods, and the above algorithm description is only exemplary and should not be taken as the only limitation for the calculation of the target operating speed of the fan.
302. Adjusting the running speed of a fan of the roof machine;
when the pressure relief bypass air valve is controlled to be in a closed state due to the fact that the first temperature difference is larger than the second temperature difference, namely the first opening degree is 0, the running rotating speed of the fan is controlled to be maintained as the preset rated running rotating speed of the fan.
Because the first temperature difference is greater than the second temperature difference, the fin heat exchanger keeps the maximum heat exchange state, the pressure relief bypass air valve is controlled to be in the closed state, the flow resistance in the machine is large at the moment, and the air volume static pressure energy is small, so that the roof machine fan is required to keep a high running rotating speed to send out air subjected to heat exchange through the air supply outlet.
When the pressure relief bypass air valve is in an opening state, the operation rotating speed of the fan is controlled to be adjusted from the preset rated operation rotating speed of the fan to a first rotating speed.
Because the pressure relief bypass air valve is in an opening state, the flow resistance in the fan is reduced along with the opening degree of the pressure relief bypass air valve, and the air volume static pressure can be increased along with the opening degree of the pressure relief bypass air valve, so that the change of the flow resistance in the fan can be controlled according to the opening degree of the pressure relief bypass air valve, and the running speed of the fan is intelligently controlled to be reduced to a target running speed, namely a first rotating speed according to the regulation condition of the flow resistance in the fan.
The following beneficial effects can be seen from the third embodiment:
when the operation mode is the temperature regulation mode, obtain the first difference in temperature according to room ambient temperature and the user's temperature that acquires, contrast through first difference in temperature and difference in temperature threshold value, confirm the open-close state of pressure release bypass air valve according to the contrast result, confirm that pressure release bypass air valve opens, after the degree of opening of further definite pressure release bypass air valve, adjust the operation rotational speed of rooftop machine fan to target operation rotational speed according to the regulation condition of flow resistance in the machine, first rotational speed promptly, reach the effect of the operation rotational speed of the regulation condition dynamic adjustment rooftop machine fan that combines flow resistance in the machine. Compared with the prior art, the technical scheme provided by the application not only can more intelligently adjust the flow resistance in the machine according to different running states of the roof machine, reduce the pressure loss in the machine, further increase the static pressure energy of conversion, reduce the running power consumption of the machine set, but also can dynamically adjust the running rotating speed of the roof machine fan in combination with the change of the flow resistance in the machine, intelligently improve the running efficiency of the roof machine fan, realize the optimal efficient running of the roof machine fan, greatly reduce unnecessary power consumption and realize the energy-saving effect.
Example four
For the convenience of understanding, an embodiment of the energy-saving control method for the rooftop unit is provided below for explanation, in practical application, the operation mode of the rooftop unit may also be a ventilation and purification mode, in which a user needs to quickly purify indoor air, but because resistance of filtered air in the rooftop unit is too large when the filtered air passes through the fin heat exchanger and the water baffle, the fan of the rooftop unit needs to maintain high power consumption operation to ensure the air volume of the filtered air sent out by the air supply outlet. Aiming at the problems, the on-off state of the pressure relief bypass air valve can be controlled, the flow resistance in the machine is reduced, the running rotating speed of the fan of the roof machine is adjusted, and the effects of energy conservation and consumption reduction are achieved.
Referring to fig. 4, an embodiment of a roof-top machine energy-saving control method in an embodiment of the present application includes:
401. detecting a first negative pressure by a pressure sensor;
a pressure sensor is a device or apparatus that senses a pressure signal and converts the pressure signal into a usable output electrical signal according to a certain rule.
It can be understood that the technology of the pressure sensor is well developed, and the types of the pressure sensors for realizing the pressure detection function are numerous, and the selection of the pressure sensor is not limited in the embodiment of the application, and the appropriate pressure sensor can be selected according to the actual application condition.
The first negative pressure is defined as the built-in negative pressure when the roof machine runs for a second time period in the ventilation and purification mode and the pressure relief bypass air valve is in a closed state.
It is understood that the second time period may be set according to the requirements of practical application, or may be set to be equal to the first time period in the second embodiment, which is not limited herein.
The negative pressure in the roof machine is defined as the surface pressure of the devices in the roof machine, and because the filtered air can generate resistance to the air when passing through various internal devices in the internal system of the roof machine, the air is prevented from passing through the internal devices, and then the air density is higher because the inside of the roof machine is a relatively closed space, so that the pressure can be formed on the surfaces of the devices in the roof machine. This demonstrates that the internal negative pressure can reflect the flow resistance in the machine.
402. Comparing the first negative pressure with the second negative pressure;
in the embodiment of the application, a fluctuation range of the negative pressure in the roof-top machine during normal operation, namely a second negative pressure, is preset, namely the roof-top machine is judged to operate normally when the first negative pressure is matched with the second negative pressure by default; when the first negative pressure is not matched with the second negative pressure, the roof machine is judged to be abnormally operated, and the roof machine is controlled to stop.
403. The pressure sensor triggers the rooftop machine controller to execute opening instruction sending;
in the ventilation and purification mode, after the normal operation of the roof-top machine is detected, the flow resistance in the roof-top machine is large, and the requirement of quick ventilation is not met. The first pressure detected by the pressure sensor triggers the rooftop machine controller to send an opening instruction to the pressure relief bypass air valve, and the pressure relief bypass air valve is controlled to make adjustment.
404. The vent valve motor adjusts the opening degree of the pressure relief bypass air valve to be maximum according to the opening instruction;
the motor is a device for converting electric energy into mechanical energy, and a rotating magnetic field is generated by utilizing an electrified coil and acts on a rotor to form magnetoelectric power rotating torque. The working principle of the motor is that the magnetic field exerts force on current to rotate the motor.
It can be understood that the motor is a mature technology in practical application, and the motor for realizing the adjustment of the opening degree of the pressure relief bypass air valve is various, and the selection of the motor in the embodiment of the application is not limited, and an appropriate motor can be selected as the motor of the vent valve according to the practical application requirements.
After receiving the opening instruction, the motor of the vent valve starts to rotate to drive the air guide connecting rod to transversely operate, and the air guide connecting rod drives the air guide blades to realize angle deflection, so that the opening degree of the pressure relief bypass air valve is adjusted, and the flow resistance in the air conditioner is reduced.
The opening degree is maximum, namely when the deflection angle of the air guide vane is 90 degrees, the pressure relief bypass air valve is completely opened at the moment.
405. Adjusting the running speed of a fan of the roof machine;
and controlling the running speed of the fan to be adjusted from the rated running speed of the fan to a second speed.
The second speed is defined as the preset operating speed of the rooftop fan in the ventilation cleaning mode.
And if the second rotating speed is set to be the lowest preset operating rotating speed of the fan after the fan runs for a period of time at the second rotating speed, the indoor ventilation is basically finished along with the complete opening of the pressure relief bypass air valve, and the air volume static pressure can reach the rated level.
It will be appreciated that the above hypothetical description is merely exemplary, and that the operational speed of the rooftop fan may be adjusted in other ways, and should not be taken as the only limitation of the operational speed adjustment method of the rooftop fan.
The following beneficial effects can be seen from the fourth embodiment:
when the operation mode is the ventilation and purification mode, after the normal operation of the rooftop is determined, the pressure sensor triggers the rooftop controller to send an instruction, the ventilation valve motor is started to control the pressure relief bypass air valve to deflect the air guide blade after receiving the instruction, the opening degree of the pressure relief bypass air valve is maximized, and the rooftop fan is controlled to adjust the operation speed to be the second speed, so that the effects of reducing the flow resistance in the rooftop fan and optimizing the operation speed of the rooftop fan are achieved. Compared with the prior art, the technical scheme that this application provided can effectively reduce the built-in flow resistance under the ventilation purification mode, reduces built-in loss of pressure, and then increases the static pressure energy of conversion, reduces unit operation consumption, promotes roof machine fan operating efficiency, satisfies the demand of quick purification room air to reach energy-conserving consumption reduction effect.
Corresponding to the embodiment of the application function implementation method, the application also provides a roof-top machine energy-saving control device, electronic equipment and a corresponding embodiment.
Fig. 5 is a schematic structural diagram of a roof-top machine energy-saving control device according to an embodiment of the present application.
Referring to fig. 5, an embodiment of the energy-saving control device of the roof-top machine in the embodiment of the present application includes:
an operation mode detection unit for detecting an operation mode of the roof machine;
the temperature data acquisition unit is used for acquiring the room environment temperature and the temperature set by the user;
the data comparison unit is used for comparing a first temperature difference with a second temperature difference, wherein the first temperature difference is a temperature difference value between the room environment temperature and the temperature set by the user, and the second temperature difference is a preset temperature difference threshold value;
and the control processing unit is used for determining the opening and closing states of the pressure relief bypass air valve according to the first temperature difference and the second temperature difference.
The following advantages can be seen from one embodiment of the energy-saving control device of the roof-top machine:
detect roof machine operational mode, when the operational mode is temperature regulation mode, room ambient temperature and user's settlement temperature according to acquireing obtain the first difference in temperature, contrast through first difference in temperature and difference in temperature threshold value, confirm the open and close state of pressure release bypass air valve according to the contrast result, reach the effect of the built-in flow resistance who adjusts the roof machine through control pressure release bypass air valve open and close state, compared with the prior art, the technical scheme that this application provided more can reduce built-in pressure loss, and then increase the static pressure energy of conversion, reduce unit operation consumption, promote roof machine fan operating efficiency.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 6 is a schematic structural diagram of an electronic device shown in an embodiment of the present application.
Referring to fig. 6, the electronic device 1000 includes a memory 1010 and a processor 1020.
The Processor 1020 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 1010 may include various types of storage units, such as system memory, Read Only Memory (ROM), and permanent storage. Wherein the ROM may store static data or instructions that are needed by the processor 1020 or other modules of the computer. The persistent storage device may be a read-write storage device. The persistent storage may be a non-volatile storage device that does not lose stored instructions and data even after the computer is powered off. In some embodiments, the persistent storage device employs a mass storage device (e.g., magnetic or optical disk, flash memory) as the persistent storage device. In other embodiments, the permanent storage may be a removable storage device (e.g., floppy disk, optical drive). The system memory may be a read-write memory device or a volatile read-write memory device, such as a dynamic random access memory. The system memory may store instructions and data that some or all of the processors require at runtime. Further, the memory 1010 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), magnetic and/or optical disks, among others. In some embodiments, memory 1010 may include a removable storage device that is readable and/or writable, such as a Compact Disc (CD), a read-only digital versatile disc (e.g., DVD-ROM, dual layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (e.g., SD card, min SD card, Micro-SD card, etc.), a magnetic floppy disc, or the like. Computer-readable storage media do not contain carrier waves or transitory electronic signals transmitted by wireless or wired means.
The memory 1010 has stored thereon executable code that, when processed by the processor 1020, may cause the processor 1020 to perform some or all of the methods described above.
The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.
Furthermore, the method according to the present application may also be implemented as a computer program or computer program product comprising computer program code instructions for performing some or all of the steps of the above-described method of the present application.
Alternatively, the present application may also be embodied as a non-transitory machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) having stored thereon executable code (or a computer program, or computer instruction code) which, when executed by a processor of an electronic device (or electronic device, server, etc.), causes the processor to perform part or all of the various steps of the above-described method according to the present application.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the applications disclosed herein may be implemented as electronic hardware, computer software, or combinations of both.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. 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). It should also be noted that, 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. It will also be noted that 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.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (18)
1. An energy-saving control method for a roof-top machine is characterized by comprising the following steps:
detecting the operation mode of the roof machine;
if the operation mode is a temperature regulation mode, acquiring the room environment temperature and the temperature set by the user;
comparing a first temperature difference with a second temperature difference, wherein the first temperature difference is a temperature difference between the room environment temperature and the temperature set by the user, and the second temperature difference is a preset temperature difference threshold;
according to the first difference in temperature with the contrast result of second difference in temperature, confirm the open and close state of pressure release bypass blast gate, pressure release bypass blast gate is used for adjusting the built-in flow resistance of roof-top machine, the open and close state includes: closed state and degree of opening.
2. The energy-saving control method of the roof-top machine according to claim 1,
according to the first difference in temperature with the contrast result of second difference in temperature, confirm the open and close state of pressure release bypass blast gate, include:
when the first temperature difference is smaller than the second temperature difference, determining the opening degree of the pressure relief bypass air valve according to the first temperature difference and the second temperature difference;
and when the first temperature difference is larger than the second temperature difference, controlling the opening and closing state of the pressure relief bypass air valve to be the closing state.
3. The energy-saving control method of the roof-top machine according to claim 2,
determining the opening degree of the pressure relief bypass air valve according to the first temperature difference and the second temperature difference, comprising:
and calculating a first opening according to the first temperature difference and the second temperature difference, and adjusting the opening degree of the pressure relief bypass air valve according to a calculation result of the first opening degree.
4. The energy-saving control method of the roof-top machine according to claim 3,
the calculating a first opening degree according to the first temperature difference and the second temperature difference includes:
calculating the first opening degree through a formula A, wherein the formula A is as follows:
A：
wherein M1 is the first opening, Tf is the room ambient temperature, Ts is the user-set room temperature, and Δ T is the second temperature difference.
5. The energy-saving control method of the roof-top machine according to claim 3,
the adjusting the opening degree of the pressure relief bypass air valve according to the calculation result of the first opening degree comprises:
controlling a ventilation valve motor to adjust the deflection angle of the air guide vane of the pressure relief bypass air valve according to the calculation result of the first opening, wherein the ventilation valve motor is a device for controlling the deflection of the air guide vane, and the deflection angle of the air guide vane is calculated through a formula B, and the formula B is as follows:
B：α＝0.9M1
wherein α is a deflection angle of the air guide blade, and M1 is the first opening degree;
the range of the deflection angle of the air guide blade is 0-90 degrees.
6. The energy-saving control method of the roof-top machine according to claim 3,
after the opening degree of the pressure relief bypass air valve is adjusted according to the calculation result of the first opening degree, the method comprises the following steps:
and calculating a first rotating speed according to the first opening, the preset rated operating rotating speed of the fan and the preset lowest operating rotating speed of the fan, wherein the first rotating speed is the target operating rotating speed after the fan is adjusted.
7. The energy-saving control method of the roof-top machine according to claim 6,
calculating a first rotating speed according to the first opening, the preset rated operating rotating speed of the fan and the preset lowest operating rotating speed of the fan, and the method comprises the following steps:
calculating the first rotation speed by a formula B, wherein the formula B is as follows:
B：N3＝N1-M1*(N1-N4)
and N3 is the first rotating speed, N1 is the preset rated operating rotating speed of the fan, M1 is the first opening degree, and N4 is the preset minimum operating rotating speed of the fan.
8. The energy-saving control method of the roof-top machine according to claim 6,
after the first rotating speed is calculated according to the first opening, the preset rated operating rotating speed of the fan and the preset lowest operating rotating speed of the fan, the method comprises the following steps:
and controlling the running rotating speed of the fan to be adjusted from the preset rated running rotating speed of the fan to the first rotating speed according to the calculation result of the first rotating speed.
9. The energy-saving control method of the roof-top machine according to claim 2,
the control the open and close state of pressure relief bypass air valve is after the closed state, include:
and controlling the current running speed of the fan to maintain the preset rated running speed of the fan.
10. The energy-saving control method of the roof-top machine according to claim 1,
before the room environment temperature and the user set temperature are obtained, the method comprises the following steps:
the operation time of the roof machine in the temperature adjusting mode reaches a first time, and whether the roof machine normally operates is detected;
and when the normal operation of the roof machine is detected, executing the step of acquiring the room environment temperature and the temperature set by the user.
11. The energy-saving control method of the roof-top machine according to claim 1,
if the operation mode is a ventilation and purification mode, determining the opening and closing state of the pressure relief bypass air valve;
detecting a first negative pressure through a pressure sensor, wherein the first negative pressure is the built-in negative pressure when the running time of the roof machine reaches a second time and the pressure relief bypass air valve is in the closed state in the ventilation and purification mode, and the built-in negative pressure is the surface pressure of built-in devices of the roof machine;
and comparing the first negative pressure with a second negative pressure, wherein the second negative pressure is a preset built-in negative pressure fluctuation range when the roof machine normally operates.
12. The energy-saving control method of the roof-top machine according to claim 11,
after comparing the first negative pressure with the second negative pressure, the method comprises the following steps:
if the first negative pressure is matched with the second negative pressure, the roof machine normally operates, and the pressure sensor triggers a roof machine controller to execute instruction sending;
and if the first negative pressure is not matched with the second negative pressure, the roof machine is abnormally operated, and the roof machine is controlled to stop.
13. The energy-saving control method for the roof-top machine according to claim 12,
the trigger rooftop controller executes command transmission, including:
the rooftop machine controller sends the instruction to a vent valve motor, and the vent valve motor adjusts the opening degree of the pressure relief bypass air valve to be maximum according to the instruction.
14. The energy-saving control method of the roof-top machine according to claim 13,
adjust pressure release bypass air valve open the degree the most, include:
and adjusting the deflection angle of the air guide vane of the pressure relief bypass air valve to 90 degrees.
15. The energy-saving control method of the roof-top machine according to claim 13,
after adjusting the opening degree of the pressure relief bypass air valve is maximum, the method comprises the following steps:
and controlling the running speed of the fan to be adjusted to a second speed from the rated running speed of the fan, wherein the second speed is the preset running speed of the fan in the ventilation and purification mode.
16. An energy-saving control device for a roof-top machine, comprising:
an operation mode detection unit for detecting an operation mode of the roof machine;
the temperature data acquisition unit is used for acquiring the room environment temperature and the temperature set by the user;
the data comparison unit is used for comparing a first temperature difference with a second temperature difference, wherein the first temperature difference is a temperature difference value between the room environment temperature and the temperature set by the user, and the second temperature difference is a preset temperature difference threshold value;
and the control processing unit is used for determining the opening and closing states of the pressure relief bypass air valve according to the first temperature difference and the second temperature difference.
17. An electronic device, comprising:
a processor; and
a memory having executable code stored thereon, which when executed by the processor, causes the processor to perform the method of any one of claims 1-15.
18. A non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to perform the method of any one of claims 1-15.
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| JPH02144214A (en) * | 1988-11-25 | 1990-06-04 | Calsonic Corp | Air conditioning device |
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| US20200263899A1 (en) * | 2019-02-15 | 2020-08-20 | Johnson Controls Technology Company | Auxiliary economizer for an hvac system |
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| JPH02144214A (en) * | 1988-11-25 | 1990-06-04 | Calsonic Corp | Air conditioning device |
| CN102278799A (en) * | 2011-08-12 | 2011-12-14 | 福州普泽冷暖设备技术有限公司 | Air conditioner with water-evaporation-type cooling fan linked function and control method thereof |
| CN202392925U (en) * | 2011-12-14 | 2012-08-22 | 西安工程大学 | Dual-bypass three-stage evaporative cooling air-conditioning unit |
| CN203215938U (en) * | 2013-03-18 | 2013-09-25 | 李国庆 | Intelligent type automatic energy-saving combined air conditioning cabinet with bypass air channels |
| US20200263899A1 (en) * | 2019-02-15 | 2020-08-20 | Johnson Controls Technology Company | Auxiliary economizer for an hvac system |
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