CN115419936B - Floor heating control method, control device and floor heating - Google Patents
Floor heating control method, control device and floor heating Download PDFInfo
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- CN115419936B CN115419936B CN202211086041.8A CN202211086041A CN115419936B CN 115419936 B CN115419936 B CN 115419936B CN 202211086041 A CN202211086041 A CN 202211086041A CN 115419936 B CN115419936 B CN 115419936B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 58
- 230000000875 corresponding effect Effects 0.000 claims description 45
- 229910052731 fluorine Inorganic materials 0.000 claims description 30
- 239000011737 fluorine Substances 0.000 claims description 30
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 29
- 230000001276 controlling effect Effects 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 19
- 239000003507 refrigerant Substances 0.000 claims description 8
- 230000002596 correlated effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/02—Arrangement of mountings or supports for radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/12—Tube and panel arrangements for ceiling, wall, or underfloor heating
- F24D3/14—Tube and panel arrangements for ceiling, wall, or underfloor heating incorporated in a ceiling, wall or floor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a floor heating control method, a control device and a floor heating. The control method comprises the following steps: acquiring outdoor environment temperature, first indoor environment temperature of a heating room and corresponding indoor target temperature; determining the target frequency of an initializing compressor according to the outdoor environment temperature, the indoor environment temperature of each heating room and the corresponding indoor target temperature and building thermal inertia index; the compressor is controlled to operate at an initialization target frequency. According to the control method provided by the invention, the outdoor environment, the room temperature requirement and the building heat inertia index are utilized to predict the room dynamic heat load requirement, so that the target frequency of the initializing compressor is determined, the frequency of the compressor is matched with the room heat load requirement, the purposes of quickly improving the room temperature and saving energy are realized, and meanwhile, the comfort is higher.
Description
Technical Field
The invention belongs to the field of air conditioners, and particularly relates to a floor heating control method, a control device and a floor heating.
Background
The home decoration heating system has various forms, and is commonly provided with a floor heating system, a capillary network, a fan disc and the like.
In cold areas, due to the limitations of electric heating and air conditioning heating, floor radiant heating for central heating of boilers is relatively popular. However, there are some problems, such as low air temperature, low unit heating capacity, small actual radiation heat dissipation capacity blocked by a bed in a narrow bedroom, and poor heating effect in cold and severe cold areas; and in the middle and lower reaches of the Yangtze river and in the south wet and cold areas, the heat loss of the enclosure is large, the radiant heating is slow in heat supply, insufficient in heat supply, the water temperature is raised blindly, and the energy consumption of the air conditioner is increased. In summer and winter cold areas, the winter mainly uses a household heating mode of air supply of an air conditioner, and the comfort and the use requirements are insufficient.
The capillary radiation air conditioning system (water) adopts the capillary grid human body bionic principle, transmits cold and heat, can effectively utilize low-grade energy, and realizes energy saving and comfort effects; as an upgrade product of the common floor heating radiation, the utility model is widely applied to foreign hotels, apartments, villas, public facilities and the like at present; the fluorine capillary network is similar to the water capillary network, has the excellent characteristics of the system, has only one heat exchange with the refrigerant, and has higher theoretical operation energy efficiency than the water system.
In various heating system forms, the fluorine capillary network is different from a floor heating water system, the high-temperature and high-pressure air refrigerant discharged by the compressor of the air conditioning system is directly conveyed to a required room through a pipeline, and then is released to the room through an enclosure structure such as a floor, the process of transferring heat to the room does not have any auxiliary (such as a pump, a fan and the like) power consumption, the heat load demand of each room changes dynamically in real time along with the factors such as the target room temperature, the outdoor environment, the enclosure structure and the like, the load demand change influences the change of the high-pressure of the condensing side system of the heating system, and the high-pressure of the system is controlled relatively stably under the influence of such sensitive and variable parameters in the fluorine capillary network, so that the frequency of the compressor is matched with the heat load demand of the room, and the technical problem to be solved urgently by the multi-online fluorine capillary network heating system is achieved.
Disclosure of Invention
In view of the above, the invention discloses a floor heating control method, a control device and a floor heating device, which are used for solving the technical problem that the frequency of a compressor is matched with the heat load requirement of a room due to the relatively stable high-pressure of a control system under the influence of sensitive and variable parameters.
In order to solve the technical problems, the invention provides a floor heating control method for heating a heating room, which comprises the following steps:
Acquiring outdoor environment temperature, first indoor environment temperature of a heating room and corresponding indoor target temperature;
Determining an initialized compressor target frequency according to the outdoor environment temperature, the first indoor environment temperature, the corresponding indoor target temperature and the building thermal inertia index;
the compressor is controlled to operate at an initialization target frequency.
Further alternatively, the plurality of first indoor environment temperatures are a plurality of, the plurality of first indoor environment temperatures correspond to a plurality of heating rooms, and the initializing the compressor target frequency is determined according to the outdoor environment temperature, the first indoor environment temperature of the heating rooms, the corresponding indoor target temperature and the building thermal inertia index, including:
Calculating first difference values of each first indoor environment temperature and the corresponding indoor target temperature, and calculating average values of all the first difference values to obtain a first room temperature demand;
determining an initial frequency of the compressor according to the outdoor environment temperature and the first room temperature demand;
and correcting the initial frequency of the compressor according to the building thermal inertia index to obtain the target frequency of the initialized compressor.
Further alternatively, determining the initial frequency of the compressor based on the outdoor ambient temperature and the first room temperature demand includes:
and searching a compressor initial frequency corresponding to the outdoor environment temperature and the first room temperature demand from a compressor initial frequency comparison table.
Further optionally, the initial frequency of the compressor is corrected according to the building thermal inertia index to obtain the target frequency of the initialized compressor, and the target frequency is calculated by adopting the following formula:
f Target object ＝f1×a；
Where f Target object denotes an initialized compressor target frequency, f 1 denotes a compressor initial frequency, and a denotes a building thermal inertia index.
Further optionally, the floor heating includes an outdoor throttling device, and the control method further includes:
determining the initialization step number of the outdoor throttling device according to the outdoor environment temperature;
controlling the opening degree of the outdoor throttling device according to the initialization step;
wherein, the outdoor environment temperature is positively correlated with the number of initialization steps.
Further alternatively, determining the number of initialization steps of the outdoor throttle device based on the outdoor ambient temperature includes:
judging a temperature interval in which the outdoor environment temperature is located;
And acquiring an initialization step number corresponding to the temperature interval.
Further alternatively, controlling the compressor to start and operate at the initialization target frequency includes:
and controlling the compressor to start and running for a preset time according to the initialization target frequency.
Further optionally, after the compressor is operated for a preset period of time according to the initialization target frequency, the control method further includes:
Determining a target high-pressure value P Target object of the floor heating, and acquiring a current actual high-pressure value P Currently, the method is that of the floor heating;
The compressor frequency is adjusted according to the target high-pressure value P Target object and the actual high-pressure value P Currently, the method is that to adjust the temperature of each heating room.
Further alternatively, determining the target pressure value P Target object of the floor heating includes:
acquiring a second indoor environment temperature of each heating room;
Calculating a second difference value between each second indoor environment temperature and the corresponding indoor target temperature, and calculating an average value of all the second difference values to obtain a second room temperature demand;
And determining a target pressure value P Target object according to the second room temperature demand and the outdoor environment temperature.
Further optionally, a third indoor environment temperature is obtained and compared with a corresponding preset shutdown temperature;
when the third indoor environment temperature is greater than or equal to the preset shutdown temperature, the electronic expansion valve corresponding to the tail end of the fluorine capillary network is controlled to be opened to a first preset opening degree.
Further optionally, the control method further includes:
When the third indoor environment temperature is smaller than the preset shutdown temperature, calculating a third difference value between the third indoor environment temperature and the corresponding indoor target temperature;
and controlling the electronic expansion valve at the tail end of the corresponding fluorine capillary network to open the corresponding opening according to the third difference value.
The invention also provides a floor heating control device comprising one or more processors and a non-transitory computer readable storage medium storing program instructions, the one or more processors being configured to implement a method according to any one of the preceding claims when the one or more processors execute the program instructions.
The invention also provides a floor heating system which adopts the control method of any one of the above, or comprises the control device.
After the technical scheme is adopted, the invention has the following beneficial effects:
The indoor dynamic heat load demand is predicted by using the outdoor environment, the room temperature demand and the building heat inertia index, so that the target frequency of the initializing compressor is determined, the frequency of the compressor is matched with the room heat load demand, the high-pressure of the system can be controlled relatively stably, the room temperature can be rapidly increased, the energy is saved, the requirement of rapid heating of a user in the initial heating stage is met, and the comfort is higher.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
fig. 1 shows a schematic view of a floor heating structure according to an embodiment of the present invention.
Fig. 2 shows a flow chart of a floor heating control method according to an embodiment of the invention.
Fig. 3 shows a flow chart of a floor heating control method according to an embodiment of the invention.
Fig. 4 shows a flow chart of a floor heating control method according to an embodiment of the invention.
Fig. 5 shows a flow chart of a floor heating control method according to an embodiment of the invention.
Wherein: the device comprises a 1-compressor, a 2-oil separator, a 3-four-way valve, a 4-outdoor heat exchanger, a 5-outdoor fan, a 6-outdoor throttling device, a 7-subcooler, an 8-subcooling electronic expansion valve, a 9-gas-liquid separator, a 10-oil return electromagnetic valve, an 11-gas pipe valve, a 12-liquid pipe valve, a 13-fluorine capillary network end and a 14-electronic expansion valve.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the fluorine capillary network multi-split heating system, the heat load requirement of each room dynamically changes in real time along with the factors of target room temperature, outdoor environment, building envelope and the like, the change of the load requirement influences the change of the high-pressure of a condensing side system of the heating system, and how to control the high-pressure of the system relatively stably under the influence of such sensitive and variable parameters so as to enable the frequency of a compressor to be matched with the heat load requirement of the room becomes a technical problem which needs to be solved urgently for the fluorine capillary network multi-split heating system. Therefore, the embodiment provides a floor heating control method. The floor heating is used for heating a heating room, and comprises fluorine floor heating and water floor heating, and the fluorine floor heating is preferred in the embodiment. The fluorine floor heating adopts a fluorine capillary network to directly convey the high-temperature high-pressure gaseous refrigerant discharged by the compressor of the air conditioning system to a required room through a pipeline, and then releases the high-temperature high-pressure gaseous refrigerant to the room through an enclosure structure such as a floor and the like. In this embodiment, the floor heating includes at least one fluorine capillary network end, and the laying manner is not limited to the ground, and may be laid on a wall surface or a ceiling of a room, which is not particularly limited herein.
Specifically, with reference to the schematic structural diagram of fig. 1, the floor heating of this embodiment includes: the compressor 1 and a gas side pipe and a liquid side pipe which are arranged at the outlet of the compressor 1 in parallel;
an outdoor heat exchanger 4 provided on the liquid side pipe;
The plurality of fluorine capillary network ends 13 are arranged on the gas side pipe and the liquid side pipe in parallel, wherein each indoor fluorine capillary network end 13 is correspondingly provided with an electronic expansion valve 14 for regulating the flow of the refrigerant.
In addition, the floor heating of this embodiment further includes:
an oil separator 2 connected to the outlet of the compressor 1 and a gas-liquid separator 9 connected to the inlet of the compressor 1;
the four-way valve 3 comprises a first interface, a second interface, a third interface and a fourth interface, wherein the first interface and the third interface are connected with the compressor 1, the second interface is connected with the outdoor heat exchanger 4, and the fourth interface is connected with the air side pipe;
A subcooler 7, the subcooler 7 being provided on the liquid side pipe;
One end of the liquid side pipe, which is communicated with the gas-liquid separator 9, is provided with a refrigerant branch, and the refrigerant branch is provided with a supercooling electronic expansion valve 8;
An outdoor throttle device 6, which may be an electronic expansion valve, is provided on the liquid side pipe between the subcooler 7 and the outdoor heat exchanger 4.
In addition, the gas measuring pipe is provided with a gas pipe valve 11 for controlling the on-off of the gas measuring pipe, the liquid side pipe is provided with a liquid pipe valve 12 for controlling the on-off of the liquid side pipe, a first pipeline connected between the oil separator 2 and the compressor 1 through a capillary pipe, and a second pipeline connected with the first pipeline in parallel, and the second pipeline is provided with an oil return electromagnetic valve 10.
The floor heating control method according to the embodiment of the invention is described below with reference to the accompanying drawings.
Fig. 2 is a flow chart of a floor heating control method according to an embodiment of the invention. Referring to fig. 2, the control method includes:
s1, acquiring outdoor environment temperature, first indoor environment temperature of a heating room and corresponding indoor target temperature.
The floor heating is powered on for the first time, a user sets the room temperature by using each fluorine capillary network room temperature wire controller in the room, the room is at most n, the room which is not set is in a power-off state, and the room is removed in various subsequent calculations.
S2, determining the target frequency of the initializing compressor according to the outdoor environment temperature, the first indoor environment temperature of the heating room, the corresponding indoor target temperature and the building thermal inertia index.
It should be noted that, the building thermal inertia index a of the embodiment is related to the thermal stability of the enclosure structure of the room, the better the thermal stability of the enclosure structure is, the less likely the room is to radiate heat, and the smaller the required thermal load is, so the smaller the value of a is; conversely, the worse the thermal stability of the enclosure, the easier it is for the room to dissipate heat, and the greater the thermal load required, and therefore the greater the value of a.
Wherein, the building thermal inertia index is a preset value, and the building thermal inertia index is directly called when in use. Building thermal inertia index: a (W/. Square.) in this example, the manufacturer's parameters take values of 0.6-2.0, defaults to 1.2.
S3, controlling the compressor to operate according to the initialization target frequency.
Because the outdoor environment temperature, the indoor target temperature and the building thermal inertia index all influence the room thermal load requirement, the room thermal load requirement also influences the change of the system high pressure, the dynamic thermal load requirement of the room is predicted by combining the influence factors, and the target operating frequency of the compressor is determined by the predicted dynamic thermal load requirement, so that the frequency of the compressor is matched with the room thermal load requirement, the high pressure of the system can be controlled relatively stably, the temperature can be quickly raised, and meanwhile, the energy can be saved.
Further alternatively, when there are a plurality of heating rooms, in combination with the flowchart of fig. 3, step S2 includes S21 to S23, where:
S21, calculating a first difference value between the first indoor environment temperature of each heating room and the corresponding indoor target temperature, and calculating an average value of all the first difference values to obtain a first room temperature demand;
Specifically, the code numbers of the parameters are as follows:
Indoor target temperature of each room: t m1、Tm2、Tm3、……Tmn;
real-time value of indoor environment temperature detection of each room: t 1、T2、T3、……Tn;
Outdoor ambient temperature detection real-time value: t Outer ring ;
Initializing a compressor target frequency: f Target object ;
The number of rooms is at most n, and in this embodiment, a description is given of 3 rooms.
A1＝((Tm1-T1)+(Tm2-T2)+(Tm3-T3))/3；
Wherein a 1 represents the first room temperature demand.
S22, determining the initial frequency of the compressor according to the outdoor environment temperature and the first room temperature demand.
Specifically, the method is determined according to the correspondence relationship between the initial frequency of the compressor and the outdoor environment temperature and the first room temperature demand. The correspondence may be in various forms, such as a table, an equation, and the like.
Further optionally, step S22 is specifically: and searching a compressor initial frequency corresponding to the outdoor environment temperature and the first room temperature demand from a compressor initial frequency comparison table.
In one implementation of this embodiment, the compressor initial frequency reference table is shown in table 1, where f 1 represents the compressor initial frequency.
Table 1 table of initial frequency of compressor
S23, correcting the initial frequency of the compressor according to the building thermal inertia index to obtain the target frequency of the initialized compressor;
Further alternatively, step S23 is calculated using the following formula:
f Target object ＝f1×a；
Where f Target object denotes an initialized compressor target frequency, f 1 denotes a compressor initial frequency, and a denotes a building thermal inertia index.
Further alternatively, in combination with the flowchart of fig. 3, the control method further includes S4 to S5, where:
s4, determining the initialization steps of the outdoor throttling device according to the outdoor environment temperature;
s5, controlling the opening degree of the outdoor throttling device according to the initialization step;
Wherein, the outdoor environment temperature is positively correlated with the number of initialization steps. That is, the higher the outdoor environment temperature, the larger the number of initialization steps, and the lower the outdoor environment temperature, the smaller the number of initialization steps.
In connection with the flow diagram of fig. 4, during the initialization phase, the compressor is started and operated at the initialization target frequency, and the outdoor throttle device is controlled in accordance with the number of initialization steps. Specifically, the smaller the number of initialization steps, i.e., the smaller the opening degree of the electronic expansion valve. The lower the outdoor ambient temperature, the lower the system low pressure to be controlled, and the required system low pressure can be achieved by controlling the number of initialization steps for which the electronic expansion valve is opened relatively small.
Further optionally, step S4 includes S41 to S42, wherein:
s41, judging a temperature interval in which the outdoor environment temperature is located;
s42, acquiring an initialization step number corresponding to a temperature interval;
The outdoor environment temperature is divided into a plurality of temperature intervals, each temperature interval corresponds to an initialization step number, and in one implementation manner of the embodiment, the correspondence between the heating initialization step number and the outdoor environment temperature interval is shown in table 2, wherein b1 is more than b2 is more than b3 is more than b4 and less than b5.
TABLE 2 heating initialization steps
Further alternatively, in conjunction with the flowchart of fig. 3, in the initialization stage, the control method further includes:
the opening degree of an electronic expansion valve at the tail end of a fluorine capillary network of each heating room is adjusted to the maximum opening degree of the electronic expansion valve; and
And controlling the outdoor fan to operate according to the upper limit value of the rotating speed.
In combination with the flow chart of fig. 4, the floor heating host executes an initialization program, the compressor is started and runs according to an initialization target frequency, the outdoor throttling device 6 is controlled according to an initialization step number, the outdoor fan is controlled according to an upper limit value of a rotating speed range, the subcooler 7 is not opened in a heating mode, namely, the subcooling electronic expansion valve 8 is closed, so that the high-pressure of the system can be controlled relatively stably, the temperature can be quickly increased, meanwhile, energy can be saved, the requirement of a user for quick temperature increase in a heating initial stage is met, and the comfort is higher.
Further alternatively, in combination with the flowchart of fig. 3, step S3 is specifically:
and controlling the compressor to operate for a preset time according to the target frequency of the initialized compressor.
In combination with the flow chart of fig. 4, in the initial stage of heating by floor heating, the initialization operation period is a preset duration, in this embodiment, the preset duration is preferably 15min, and after the preset duration, the system enters a stable control stage. It should be noted that, the control method of the present embodiment is not limited to be applied in the system initialization stage, and the control method is also applicable in other operation stages in order to control the high-pressure of the system relatively stably.
Further alternatively, in combination with the flowchart of fig. 3, after the compressor is operated for a preset period of time according to the initialization target frequency, the control method further includes:
S60, determining a target pressure value P Target object of the floor heating, and acquiring a current actual high pressure value P Currently, the method is that of the floor heating;
the actual high pressure value P Currently, the method is that here refers to the compressor discharge pressure at which the system is running. The target pressure value P Target object refers to a target value of the compressor discharge pressure at the time of operation.
And S61, adjusting the frequency of the compressor according to the target pressure value P Target object and the actual high pressure value P Currently, the method is that .
The initialization program is executed after the floor heating is electrified, the outdoor environment, the room temperature requirement and the building heat inertia index are utilized to predict the room dynamic heat load requirement, so that the frequency of the compressor is matched with the room heat load requirement, the high-pressure of the system can be controlled relatively stably, the room temperature can be quickly increased, and the floor heating is more energy-saving. After the initialization procedure is finished, the system enters a stable control stage in which the compressor target frequency f' Target object is controlled according to the system target pressure value P Target object , so that the system high pressure can be controlled relatively stably. The following control is updated once at preset time intervals, which are typically 1min, but is not limited thereto.
Further alternatively, the step S60 of determining the target pressure value P Target object of the floor heating includes steps S601 to S603, wherein:
S601, acquiring a second indoor environment temperature of each heating room;
the second indoor environment temperature in this embodiment is described with reference to fig. 4, where the second indoor environment temperature is an indoor environment temperature collected for determining the system target voltage value P Target object in the steady control stage, and the second indoor environment temperature is not a fixed value, and in this embodiment, the second indoor environment temperature may be collected once every 1min, so that the system target voltage value P Target object is updated once every 1 min.
S602, calculating a second difference value between each second indoor environment temperature and the corresponding indoor target temperature, and calculating an average value of all the second difference values to obtain a second room temperature demand;
And S603, determining a target pressure value P Target object according to the second room temperature demand and the outdoor environment temperature.
Further alternatively, S603 is specifically: and searching a target high-pressure value P Target object corresponding to the second room temperature demand and the outdoor environment temperature from a target high-pressure corresponding table. Specifically, the target high pressure correspondence table is shown in table 3, in which the second room temperature demand is denoted by a 2.
TABLE 3 target pressure correspondence table
Further alternatively, in combination with the flowchart of fig. 5, the control method of the present embodiment further includes steps S62 to S63, where:
S62, acquiring a third indoor environment temperature and comparing the third indoor environment temperature with a corresponding preset shutdown temperature;
The third indoor environment temperature of the present embodiment, which is a stable indoor environment temperature collected during the control phase to avoid frequent shutdown due to the room temperature reaching the shutdown point, is not a fixed value, and is collected once every a certain period (for example, 1 min) in the present embodiment, will be described with reference to fig. 4.
And S63, when the third indoor environment temperature is greater than or equal to the preset shutdown temperature, controlling the electronic expansion valve at the tail end of the corresponding fluorine capillary network to be opened to a first preset opening degree.
The preset shutdown temperature is generally an indoor target temperature of +1 (DEG C), namely a user-set temperature.
After the room temperature exceeds the target temperature by 1 ℃, the indoor unit is immediately closed by the traditional room temperature control method, heat is stopped to be supplied to the room, at the moment, the room temperature is reduced due to continuous external heat leakage of the room, after the room temperature is reduced to the target room temperature by 1 ℃, the indoor unit is opened, the room heating is recovered, the actual room temperature fluctuation is larger, generally 2-5 ℃ due to the delay of the control system, the comfort effect is affected, the fluorine capillary tube electronic expansion valve of the room keeps a first preset opening degree (namely, the number of steps is kept smaller, and the first preset opening degree is preferably 80B in the embodiment), so that the room temperature of the heating room is reduced slowly, and the problem of reducing the fluctuation of the room temperature is effectively solved.
Further optionally, the control method further includes:
S64, when the third indoor environment temperature is smaller than the preset shutdown temperature, calculating a third difference value between the third indoor environment temperature and the target temperature of the corresponding heating room;
And S65, controlling the electronic expansion valve at the tail end of the corresponding fluorine capillary network to open the corresponding opening according to the third difference value.
Wherein the preset shutdown temperature is equal to the room target temperature plus an increment Δx, where Δx is greater than or equal to 0, typically Δx is 1 ℃. And under the condition that the third indoor environment temperature is smaller than the preset shutdown temperature, calculating a third difference value between the third indoor environment temperature and the corresponding indoor target temperature, namely adjusting the opening of the electronic expansion valve according to the current room temperature demand, so that the comfort effect is improved.
Specifically, taking room 1 as an example, the indoor target temperature is T m1, and the current measured indoor temperature value is T 1:
if the temperature is less than or equal to T 1-Tm1 and is less than or equal to 1 ℃, the opening of the room capillary tube electronic expansion valve is kept at 80B (the smaller step number is maintained);
If T 1-Tm1 is more than or equal to 0 ℃ and less than 1 ℃, the opening of the room capillary tube electronic expansion valve is kept at 240B;
if T 1-Tm1 is less than 0 ℃ below zero and more than or equal to 1 ℃, the opening of the room capillary tube electronic expansion valve is kept to be 360B;
If T 1-Tm1 is < -1 ℃, the room capillary electronic expansion valve is kept at the opening 480B (full-opening).
According to the floor heating control method, the outdoor environment, the room temperature requirement and the building heat inertia index are utilized to predict the room dynamic heat load requirement in the system initialization stage, and the target running frequency of the compressor is determined according to the prediction, so that the frequency of the compressor is matched with the room heat load requirement, the high-pressure of the system can be controlled relatively stably, the temperature is quickly raised, and meanwhile energy can be saved. After the initialization stage is finished, the operation enters a stable control stage, and at the stage, the frequency of the compressor is controlled by the system target pressure value, so that the indoor temperature can be accurately regulated and controlled. On the basis, the electronic expansion valves are arranged at the tail ends of each fluorine capillary network, when the indoor environment temperature reaches the preset shutdown temperature, frequent shutdown can be avoided by adjusting the opening of the corresponding electronic expansion valve, the room temperature fluctuation caused by the startup and shutdown to a temperature point is effectively reduced, the room temperature control precision can be controlled within +/-1 ℃ compared with that of a common heating system, and the comfort is higher.
The present embodiment also provides a floor heating control device, which includes one or more processors and a non-transitory computer readable storage medium storing program instructions, where the one or more processors are configured to implement the method of any one of the preceding claims when the one or more processors execute the program instructions.
The embodiment also provides a floor heating system, which adopts the control method of any one of the previous embodiments or comprises the control device.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.
Claims (12)
1. A floor heating control method for heating a heating room, the floor heating comprising: an indoor side, an outdoor side, and a gas side pipe and a liquid side pipe connected between the indoor side and the outdoor side;
the indoor side comprises a plurality of indoor fluorine capillary network ends which are arranged in parallel, and each indoor fluorine capillary network end is correspondingly provided with an electronic expansion valve for regulating the flow of the refrigerant;
The outdoor side comprises a compressor, an outdoor heat exchanger and an outdoor throttling device, and an air inlet of the compressor is communicated with an outlet of the air side pipe; the exhaust port of the compressor is communicated with the air inlet of the outdoor heat exchanger, the liquid outlet of the outdoor heat exchanger is communicated with the liquid inlet of the outdoor throttling device, the liquid outlet of the outdoor throttling device is communicated with the inlet of the liquid side pipe, and the outlet of the liquid side pipe is communicated with the inlets at the tail ends of the plurality of indoor fluorine capillary networks; the outlets of the tail ends of the fluorine capillary networks are communicated with the inlet of the air side pipe, and the outlet of the air side pipe is communicated with the air inlet of the compressor;
The control method is characterized by comprising the following steps:
acquiring an outdoor environment temperature, a first indoor environment temperature of the heating room and a corresponding indoor target temperature;
Determining an initialization compressor target frequency according to the outdoor environment temperature, the first indoor environment temperature of the heating room, the corresponding indoor target temperature and the building thermal inertia index;
controlling the compressor to run for a preset time according to the initialized compressor target frequency;
After the controlling the compressor to run for a preset time period according to the initialized compressor target frequency, the control method further comprises the following steps:
determining a target pressure value of ground heating based on the outdoor ambient temperature, a second indoor ambient temperature of the heating room and a corresponding indoor target temperature;
The frequency of the compressor is currently adjusted based on the target high-pressure value and the current actual high-pressure value of the floor heating;
the control method further includes:
Acquiring a third indoor environment temperature and comparing the third indoor environment temperature with a corresponding preset shutdown temperature;
When the third indoor environment temperature is smaller than the preset shutdown temperature, calculating a third difference value between the third indoor environment temperature and the corresponding indoor target temperature;
And controlling the electronic expansion valve at the tail end of the corresponding fluorine capillary network to open the corresponding opening according to the third difference value.
2. The control method of claim 1, wherein the determining an initialization compressor target frequency based on the outdoor ambient temperature, the first indoor ambient temperature of the heating room, and the corresponding indoor target temperature and building thermal inertia index comprises:
Calculating a first difference value between the first indoor environment temperature of each heating room and the corresponding indoor target temperature, and calculating an average value of all the first difference values to obtain a first room temperature demand;
Determining a compressor initial frequency based on the outdoor ambient temperature and the first room temperature demand;
And correcting the initial frequency of the compressor according to the building thermal inertia index to obtain the target frequency of the initialized compressor.
3. The control method of claim 2, wherein said determining a compressor initial frequency based on said outdoor ambient temperature and said first room temperature demand comprises:
and searching a compressor initial frequency corresponding to the outdoor environment temperature and the first room temperature demand from a compressor initial frequency comparison table.
4. A control method according to claim 3, wherein the initial compressor frequency is corrected based on the building thermal inertia index to obtain the initial compressor target frequency, calculated using the following formula:
ftarget=f1×a;
wherein, f target represents the initialized compressor target frequency, f1 represents the initial compressor frequency, and a represents the building thermal inertia index.
5. The control method according to claim 1, characterized in that the control method further comprises:
Determining the initialization step number of the outdoor throttling device according to the outdoor environment temperature;
Controlling the opening degree of the outdoor throttling device according to the initialization steps;
wherein the outdoor ambient temperature is positively correlated with the number of initialization steps.
6. The control method of claim 5, wherein said determining the number of initialization steps of said outdoor throttle device based on said outdoor ambient temperature comprises:
Judging a temperature interval in which the outdoor environment temperature is located;
and acquiring an initialization step number corresponding to the temperature interval.
7. The control method of claim 1, wherein the adjusting the compressor frequency based on the target high pressure value and the ground heating current actual high pressure value comprises:
determining a target high-pressure value of the floor heating, and acquiring a current actual high-pressure value of the floor heating;
and adjusting the frequency of the compressor according to the target high pressure value and the actual high pressure value.
8. The control method of claim 7, wherein the determining the target pressure value for floor heating based on the outdoor ambient temperature, the second indoor ambient temperature of the heating room, and the corresponding indoor target temperature comprises:
acquiring a second indoor environment temperature of each heating room;
Calculating a second difference value between the second indoor environment temperature of each heating room and the corresponding indoor target temperature, and calculating the average value of all the second difference values to obtain a second room temperature demand;
The target high pressure value is determined based on the second room temperature demand and the outdoor ambient temperature.
9. The control method according to any one of claims 1 to 8, characterized in that after the obtaining of a third indoor environment temperature and the comparing of the third indoor environment temperature with a corresponding preset shutdown temperature, the control method further comprises:
When the third indoor environment temperature is greater than or equal to the preset shutdown temperature, the electronic expansion valve at the tail end of the corresponding fluorine capillary network is controlled to be opened to a first preset opening degree so that the room temperature of the heating room can be slowly reduced.
10. The method according to any one of claims 1 to 8, wherein controlling the opening of the electronic expansion valve at the end of the corresponding fluorine capillary network according to the third difference value includes:
And controlling the opening corresponding to the opening of the electronic expansion valve at the tail end of the corresponding fluorine capillary network according to the third difference value and the preset difference value range.
11. A floor heating control device, characterized in that it comprises one or more processors and a non-transitory computer readable storage medium storing program instructions, which when executed by the one or more processors are adapted to carry out the method according to any one of claims 1-10.
12. Floor heating, characterized in that it employs the control method according to any one of claims 1-9, or comprises the control device according to claim 11.
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