CN115419937A - Floor heating control method and device and floor heating - Google Patents

Floor heating control method and device and floor heating Download PDF

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Publication number
CN115419937A
CN115419937A CN202211086301.1A CN202211086301A CN115419937A CN 115419937 A CN115419937 A CN 115419937A CN 202211086301 A CN202211086301 A CN 202211086301A CN 115419937 A CN115419937 A CN 115419937A
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China
Prior art keywords
target
temperature
value
preset
compressor
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CN202211086301.1A
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Chinese (zh)
Inventor
卢浩贤
张世航
梁纯龙
林声杰
覃宗华
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202211086301.1A priority Critical patent/CN115419937A/en
Publication of CN115419937A publication Critical patent/CN115419937A/en
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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
    • 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

Abstract

The invention provides a floor heating control method, a floor heating control device and a floor heating. The control method comprises the following steps: acquiring a first indoor environment temperature and a corresponding preset shutdown temperature, and comparing the first indoor environment temperature with the corresponding preset shutdown temperature; and when the first indoor environment temperature is greater than or equal to the preset shutdown temperature, controlling the electronic expansion valve corresponding to the tail end of the fluorine capillary network to open by a first preset opening. By the control method, when the indoor environment temperature reaches the preset shutdown temperature, the electronic expansion valve is kept at a smaller opening, so that the room temperature fluctuation caused by startup and shutdown at the temperature point can be effectively reduced, frequent shutdown is avoided, the room temperature control precision can be controlled within +/-1 ℃ compared with that of a common heating system, and the comfort is higher.

Description

Floor heating control method and device and floor heating
Technical Field
The invention belongs to the field of air conditioners, and particularly relates to a floor heating control method, a floor heating control device and a floor heating.
Background
The home decoration heating system has various forms, and common floor heating systems, capillary networks, air plates and the like.
The capillary radiation air conditioning system (water) adopts the bionic principle of a capillary grid human body to transmit cold and heat, can effectively utilize low-grade energy and realize energy-saving and comfortable effects; as an upgrading product of common floor heating radiation, the radiation type floor heating radiation system is widely applied to foreign hotels, apartments, villas, public facilities and the like at present; the tail end of the fluorine capillary network is similar to that of the water capillary network, the excellent characteristics of the system are achieved, only one-time heat exchange is carried out between the fluorine capillary network and the refrigerant, and the theoretical operation energy efficiency is higher than that of a water system. In a fluorine capillary network multi-split heating system, generally, the system is shut down after the indoor temperature reaches a set temperature, so that the problems of large fluctuation of the indoor temperature and frequent start and stop of the system are caused, and the comfort of a user is influenced.
Disclosure of Invention
In view of the above, the invention discloses a floor heating control method, a floor heating control device and a floor heating system, which are used for solving the problem of frequent startup and shutdown of a fluorine capillary network multi-connected heating system.
In order to solve the technical problems, the invention provides a floor heating control method, the floor heating is used for heating a heating room, the floor heating comprises fluorine capillary network ends distributed in the heating room, and each fluorine capillary network end is correspondingly provided with an electronic expansion valve for adjusting the flow of a refrigerant, the control method comprises the following steps:
acquiring a first indoor environment temperature of a heating room and a corresponding preset shutdown temperature, and comparing the first indoor environment temperature with the corresponding preset shutdown temperature;
and when the first indoor environment temperature is greater than or equal to the preset shutdown temperature, controlling the electronic expansion valve corresponding to the tail end of the fluorine capillary network to open by a first preset opening a.
Further optionally, the control method further includes:
when the first indoor environment temperature is lower than the preset shutdown temperature, calculating a first difference value between the first indoor environment temperature and the indoor target temperature of the pair;
and controlling the opening of the electronic expansion valve corresponding to the tail end of the fluorine capillary network according to the first difference value. '
Further optionally, controlling the opening of the electronic expansion valve corresponding to the end of the fluorine capillary network according to the interval where the first difference is located includes:
when the first difference value is smaller than a first preset value and larger than or equal to a second preset value, controlling the electronic expansion valve to open a second preset opening degree b;
when the first difference value is smaller than the second preset value and larger than or equal to a third preset value, controlling the electronic expansion valve to open a third preset opening degree c;
when the first difference value is smaller than a third preset value, controlling the electronic expansion valve to open a fourth opening d;
wherein a is more than b and more than c is more than d.
Further optionally, the control method further includes: determining target high-voltage value P of floor heating Target And obtaining the current actual high-voltage value P of the floor heating At present ；
According to the target high pressure value P Target And an actual high pressure value P At present The frequency of the compressor is adjusted to adjust the room temperature of each heating room.
Further optionally, when a plurality of heating rooms are available, determining a target high-voltage value P of the floor heating system Target The method comprises the following steps:
acquiring an outdoor environment temperature and a second indoor environment temperature of each heating room;
calculating second difference values of the second indoor environment temperatures of all the heating rooms and the corresponding indoor target temperatures, and calculating the average value of all the second difference values to obtain a first room temperature demand;
determining a target high pressure value P according to the first room temperature demand and the outdoor environment temperature Target 。
Further optionally, the target high pressure value P is determined according to the room temperature demand and the outdoor ambient temperature Target Comprises that：
Searching a target high-pressure value P corresponding to the first room temperature demand and the outdoor environment temperature from a target high-pressure corresponding table Target 。
Further optionally, according to the target high pressure value P Target And an actual high pressure value P At present Adjusting a compressor frequency, comprising:
judging the actual high pressure value P At present And a target high pressure value P Target The third difference value of (2) is in the interval;
and adjusting the frequency of the compressor according to the interval where the third difference value is located.
Further optionally, adjusting the frequency of the compressor according to the interval where the third difference is located includes:
when the third difference is smaller than a first preset threshold value, controlling the compressor to increase the frequency by a first increment delta 1;
when the third difference value is greater than or equal to the first preset threshold value and less than a second preset threshold value, controlling the compressor to increase the frequency by a second increment delta 2;
when the third difference is greater than or equal to the second preset threshold and smaller than a third preset threshold, controlling the compressor to increase the frequency by a third increment delta 3;
when the third difference is greater than or equal to a third preset threshold and less than a fourth preset threshold, inhibiting frequency boosting;
when the third difference is greater than or equal to the fourth preset threshold and less than a fifth preset threshold, controlling the compressor to reduce the frequency by a fourth increment delta 4;
when the third difference is greater than or equal to a fifth preset threshold, controlling the compressor to reduce the frequency by a fifth increment delta 5;
wherein, delta 1 is more than Delta 2 and more than Delta 3 and more than 0, and Delta 4 is more than 0 and less than Delta 5.
Further optionally, determining the target high pressure value P of the floor heating Target The control method further comprises the following steps:
acquiring an outdoor environment temperature, a third indoor environment temperature and a corresponding indoor target temperature;
determining an initialized compressor target frequency according to the outdoor environment temperature, the third indoor environment temperature, the corresponding indoor target temperature and the building thermal inertia index;
controlling the compressor to start and operate according to the initialization target frequency.
The present invention also provides a warming control apparatus comprising one or more processors and a non-transitory computer-readable storage medium having stored thereon program instructions, the one or more processors being configured to implement the method of any one of the preceding paragraphs when the program instructions are executed by the one or more processors.
The invention also provides a floor heating system which adopts the method as described in any one of the preceding paragraphs or comprises the device as described in the preceding paragraph.
After the technical scheme is adopted, the invention has the following beneficial effects:
according to the invention, the electronic expansion valve is arranged at the tail end of each capillary network, when the indoor environment temperature reaches the preset shutdown temperature, the electronic expansion valve is kept at a smaller opening, the room temperature fluctuation caused by shutdown at a temperature point can be effectively reduced, frequent shutdown is avoided, the room temperature control precision can be controlled within +/-1 ℃ compared with that of a common heating system, and the comfort is higher.
The following describes 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, 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 without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 shows a schematic structural diagram of a floor heating according to an embodiment of the present invention.
Fig. 2 shows a schematic flow chart of a floor heating control method according to an embodiment of the invention.
Fig. 3 shows a schematic flow diagram of a floor heating control method according to an embodiment of the invention.
Fig. 4 shows a schematic flow chart of a floor heating control method according to an embodiment of the invention.
Fig. 5 shows a schematic flow diagram of a floor heating control method according to an embodiment of the invention.
Wherein: the system comprises a compressor 1, an oil separator 2, a four-way valve 3, an outdoor heat exchanger 4, an outdoor fan 5, an outdoor throttling device 6, a subcooler 7, an electronic subcooling expansion valve 8, a gas-liquid separator 9, an oil return electromagnetic valve 10, an air pipe valve 11, a liquid pipe valve 12, a capillary network 13 and an electronic expansion valve 14.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it for those skilled in the art by reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In a fluorine capillary network multi-split heating system, generally, the system is shut down after the indoor temperature reaches a set temperature, so that the problems of large fluctuation of the indoor temperature and frequent start and stop of the system are caused, and the comfort of a user is influenced. In order to solve the above problems, the present embodiment provides a floor heating control method. The floor heating system is used for heating 1 or more heating rooms, and comprises fluorine capillary networks distributed at the tail ends of the heating rooms. The tail end of the fluorine capillary network directly conveys high-temperature and high-pressure gaseous refrigerants discharged by a compressor of an air conditioning system to a required room through a pipeline, and then the gaseous refrigerants are released to the room through space enclosing structures such as a floor and the like.
With reference to the schematic structural diagram of fig. 1, the floor heating system 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 arranged on the liquid side pipe;
and the tail ends 13 of the fluorine capillary networks are arranged on the gas side pipe and the liquid side pipe in parallel, wherein each tail end 13 of the fluorine capillary network is correspondingly provided with an electronic expansion valve 14 for adjusting the flow of a refrigerant.
In addition, the floor heating of this embodiment still 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;
the subcooler 7, the subcooler 7 is set up 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 an electronic expansion valve 8 of a subcooler;
an outdoor throttling device 6, which can be an electronic expansion valve specifically, is arranged on a liquid side pipe between the subcooler 7 and the outdoor heat exchanger 4.
In addition, an air pipe valve 11 for controlling the on-off of the gas measuring pipe is arranged on the gas measuring pipe, a liquid pipe valve 12 for controlling the on-off of the gas measuring pipe is arranged on the liquid side pipe, a first pipeline connected between the oil separator 2 and the compressor 1 through a capillary tube and a second pipeline connected with the first pipeline in parallel are arranged on the second pipeline, and an oil return electromagnetic valve 10 is arranged on the second pipeline.
The floor heating system of the embodiment is characterized in that the electronic expansion valve is arranged at the tail end of each fluorine capillary network, when the indoor environment temperature reaches the preset shutdown temperature, the electronic expansion valve is controlled to maintain a smaller opening degree, the fluctuation of the room temperature caused by startup and shutdown at a temperature point can be effectively reduced, the room temperature control precision of a common heating system can be controlled within +/-1 ℃, and the comfort is higher.
The floor heating control method according to the embodiment of the invention is described below with reference to the accompanying drawings.
With reference to the flowchart of fig. 2, the control method of the present embodiment includes steps S1 to S2, where:
s1, acquiring a first indoor environment temperature of a heating room and a corresponding preset shutdown temperature, and comparing the first indoor environment temperature with the corresponding preset shutdown temperature;
specifically, the number of rooms is at most n, the tail end of each capillary network is laid in 1 room, a user is powered on for the first time, each capillary network room temperature wire controller in the room is used for setting the room temperature, the rooms which are not set are in a power-off state, and the rooms are removed in subsequent calculations;
the preset shutdown temperature is typically the indoor target temperature +1 (deg.C).
And S2, when the first indoor environment temperature is greater than or equal to the preset shutdown temperature, controlling the electronic expansion valve corresponding to the tail end of the fluorine capillary network to open by a first preset opening a. In this embodiment, in order to avoid frequent shutdown when the room temperature reaches the preset shutdown temperature, the first indoor ambient temperature is collected once every certain time interval (e.g., 1 min).
The preset shutdown temperature is equal to the indoor target temperature plus an increment Δ x, where Δ x is greater than or equal to 0, typically Δ x is 1 ℃.
When the room temperature exceeds the target temperature by 1 ℃, the conventional room temperature control method immediately turns off the indoor unit and stops supplying heat to the room, the room temperature is reduced due to the fact that the room continuously leaks heat to the outside, the indoor unit is turned on after the room temperature is reduced to the target room temperature by 1 ℃, the room heat supply is recovered, and the actual room temperature fluctuates greatly, generally 2-5 ℃, due to the time delay of a control system, so that the comfort effect is influenced. In this embodiment, the electronic expansion valve is disposed at the end of each fluorine capillary network, and here, the electronic expansion valve is kept at a smaller opening degree (i.e., a first preset opening degree, which is preferably 80B in this embodiment), so that the room temperature of a room can be reduced to be slowly reduced, thereby effectively reducing the room temperature fluctuation caused by starting and stopping at a temperature point, and compared with a common heating system, the room temperature control accuracy can be controlled within ± 1 ℃, and the comfort is higher.
Further optionally, with reference to the flowchart of fig. 3, the control method of this embodiment further includes steps S3 to S4, where:
s3, when the first indoor environment temperature is lower than the preset shutdown temperature, calculating a first difference value between the first indoor environment temperature and the corresponding indoor target temperature;
and S4, controlling the opening of the electronic expansion valve corresponding to the tail end of the fluorine capillary network according to the first difference value.
When the first indoor environment temperature is lower than the preset shutdown temperature, calculating a first difference value between the first indoor environment temperature and the corresponding indoor target temperature, wherein the first difference value reflects the current room temperature demand, so that the opening degree of the electronic expansion valve is adjusted, accurate temperature control is realized, and the heating comfort is improved.
Further optionally, with reference to the flowchart of fig. 3, in an implementation manner of this embodiment, S4 includes S41 to S43, where:
s41, when the first difference value is smaller than a first preset value and larger than or equal to a second preset value, controlling the electronic expansion valve to open a second preset opening degree b;
s42, when the first difference value is smaller than the second preset value and larger than or equal to a third preset value, controlling the electronic expansion valve to open a third preset opening degree c;
s43, when the first difference value is smaller than a third preset value, controlling the electronic expansion valve to open a fourth angle d;
wherein a is more than b and more than c and less than d.
Specifically, the preset shutdown temperature is +1 ℃ of the indoor target temperature, the first preset value is 1 ℃, the second preset value is 0 ℃, and the third preset value is-1 ℃, but not limited thereto, taking the room 1 as an example:
if T is less than or equal to 1 DEG C 1 -T m1 Then the house is madeThe inter-capillary electronic expansion valve keeps the opening 80B (keeps a smaller number of steps);
if the temperature is less than or equal to 0 ℃ and T 1 -T m1 If the temperature is lower than 1 ℃, the opening degree of the capillary electronic expansion valve in the room is kept at 240B;
if T is less than or equal to-1 DEG C 1 -T m1 If the temperature is less than 0 ℃, the electronic expansion valve of the capillary tube in the room keeps an opening degree of 360B;
if T 1 -T m1 And less than-1 deg.c, the electronic expansion valve maintains the opening 480B.
Further optionally, the control method of this embodiment further includes steps S5 to S6, where:
s5, determining a target high-pressure value P of the floor heating system Target And obtaining the current actual high pressure value P At present ；
The actual high pressure value P here At present Refers to the compressor discharge pressure at which the system is operating. Target high pressure value P Target Refers to a target value for compressor discharge pressure at run time. Updating the primary system target high-pressure value P according to a preset time interval Target According to the target high pressure value P Target And adjusting the frequency of the compressor to relatively stably control the high pressure of the system, thereby accurately controlling the room temperature.
Further optionally, with reference to the flowchart of fig. 4, when there are multiple heating rooms, the target high voltage value P of the floor heating system is determined in step S5 Target Comprising S51 to S53, wherein:
s51, acquiring the outdoor ambient temperature and the second indoor ambient temperature of each heating room;
in particular, the target high pressure value P of the system is determined Target And then, collecting the outdoor ambient temperature by using the outdoor temperature sensing bulb, and acquiring a second indoor ambient temperature by using the indoor temperature sensing bulb.
S52, calculating second difference values of 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 first room temperature demand;
setting target temperature of each heating room: t is a unit of m1 、T m2 、T m3 、···T mn ；
Real-time value of room temperature detection of each heating room: t is 1 、T 2 、T 3 、···T n ；
Outdoor ambient temperature detection real-time value: t is Outer ring ；
The number of rooms is at most n, which is only described here in terms of 3 rooms, the end of each capillary network being laid in 1 room;
A 1 ＝((T m1 -T 1 )+(T m2 -T 2 )+(T m3 -T 3 ))/3；
wherein A is 1 Representing the first room temperature demand.
S53, determining a target high-pressure value P according to the first room temperature demand and the outdoor environment temperature Target 。
Further optionally, in an implementation manner of this embodiment, S53 specifically is:
searching a target high-pressure value P corresponding to the first room temperature demand and the outdoor environment temperature from a target high-pressure corresponding table Target . Further alternatively, the target high pressure correspondence table is shown in table 1,
TABLE 1 target high pressure correspondence table
Figure BDA0003835273360000091
S6, according to the target high pressure value P Target And an actual high pressure value P At present Adjusting the frequency of the compressor;
in the present embodiment, the compressor target frequency f 'is shown in the flow chart of FIG. 5' Target According to the system target high pressure value P Target And controlling to maintain the high pressure stability of the system, thereby maintaining the room temperature stability and avoiding the fluctuation of the room temperature.
Further optionally, with reference to the flowchart of fig. 4, step S6 includes S61 to S62, where:
s61, judging the actual high pressure value P At present And a target high pressure value P Target The third difference value of (2) is in the interval;
s62, adjusting the frequency of the compressor according to the interval where the third difference value is located;
the actual high-pressure value is represented by P, and the unit is the temperature value converted from the refrigerant saturation temperature corresponding to the high-pressure of the system;
in order to maintain the indoor temperature at a steady state, namely the indoor temperature is floated above and below the indoor target temperature, the current actual high pressure value P of the system is passed At present And a target high pressure value P Target The difference between them (denoted as the third difference) is used to fine-tune the existing frequency of the compressor.
Specifically, by judging the section where the third difference is located, an adjustment increment (unit hz) corresponding to the section is obtained to perform fine adjustment on the existing frequency of the compressor.
Further optionally, in one implementation of this embodiment,
when the third difference is smaller than a first preset threshold value, controlling the compressor to increase the frequency by a first increment delta 1;
when the third difference is greater than or equal to the first preset threshold and smaller than the second preset threshold, controlling the compressor to increase the frequency by a second increment delta 2;
when the third difference is greater than or equal to the second preset threshold and smaller than a third preset threshold, controlling the compressor to increase the frequency by a third increment delta 3;
when the third difference is greater than or equal to a third preset threshold and less than a fourth preset threshold, inhibiting frequency boosting;
when the third difference is greater than or equal to the fourth preset threshold and less than a fifth preset threshold, controlling the compressor to reduce the frequency by a fourth increment delta 4;
when the third difference is greater than or equal to the fifth preset threshold, controlling the compressor to reduce the frequency by a fifth increment delta 5;
wherein, delta 1 is more than Delta 2 and more than Delta 3 and more than 0, and Delta 4 is more than 0 and less than Delta 5.
Specifically, a compressor target frequency f' Target According to the target high voltage value P of the floor heating Target Performing control, wherein the control is updated once every 1min, the first preset threshold is-8 ℃ preferably, and the second preset threshold is-3 preferablyPreferably, the third preset threshold is-1 ℃, the fourth preset threshold is 0 ℃, and the fifth preset threshold is 1 ℃:
if P At present -P Target If the temperature is lower than minus 8 ℃, the frequency of the compressor is increased by 8hz on the existing basis;
if the temperature is less than or equal to P at minus 8 DEG C At present -P Target If the temperature is lower than minus 3 ℃, the frequency of the compressor is increased by 5hz on the existing basis;
if the temperature is less than or equal to-3 ℃ and P is less than or equal to At present -P Target When the temperature is lower than minus 1 ℃, the frequency of the compressor is increased by 3hz on the basis of the prior frequency;
if the temperature is less than or equal to P at minus 1 DEG C At present -P Target If the temperature is less than 0 ℃, the frequency of the compressor maintains the current frequency, and the frequency boosting is forbidden;
if the temperature is less than or equal to 0 ℃ and P is less than or equal to At present -P Target If the temperature is lower than 1 ℃, the frequency of the compressor is decreased by 3hz on the existing basis;
if the temperature is less than or equal to 1 ℃ and P is less than or equal to At present -P Target The compressor frequency is then reduced to 7hz on an existing basis.
The floor heating control method of the embodiment controls the frequency of the compressor according to the target high-pressure value of the system, and can maintain the high-pressure stability of the system. On the basis, the electronic expansion valve is arranged at the tail end of each fluorine capillary network, when the indoor environment temperature reaches the preset shutdown temperature, the electronic expansion valve is adjusted to maintain smaller opening, so that the room temperature fluctuation caused by startup and shutdown at the temperature point is effectively reduced, the room temperature control precision can be controlled within +/-1 ℃ compared with that of a common heating system, frequent shutdown is avoided, and the comfort is higher.
Further optionally, determining the target high pressure value P of the floor heating Target The control method also comprises the following steps:
a1, acquiring an outdoor environment temperature, an environment temperature in a third room of a heating room and a corresponding indoor target temperature; the third-chamber ambient temperature is not a fixed value, and in this embodiment, the third-chamber ambient temperature may be detected in real time or may be detected once every certain interval.
A2, determining an initialized compressor target frequency according to the outdoor environment temperature, the third indoor environment temperature, the corresponding indoor target temperature and the building thermal inertia index;
and A3, controlling the compressor to operate according to the initialization target frequency.
Specifically, with reference to the flow diagram of fig. 5, during the floor heating operation, especially at the initialization stage thereof, the dynamic heat load demand of the room is predicted by using the outdoor environment, the room temperature demand and the building thermal inertia index, and the target frequency f of the initialization compressor is determined according to the prediction result Target The frequency of the compressor is matched with the heat load requirement of a room, so that the high pressure of the system can be controlled relatively stably, the temperature can be rapidly raised, and meanwhile, the energy can be saved.
Specifically, after the floor heating is powered on, the host executes an initialization program, and the compressor 1 is started and operates according to an initialization target frequency. The heating electronic expansion valve 6 is controlled according to the initialization steps, the outdoor fan 5 is controlled according to the maximum rotating speed, and the subcooler 7 is not opened in the heating mode, namely the subcooled electronic expansion valve 8 is closed. Therefore, the rapid heating and energy saving can be realized at the initial stage of heating the fluorine floor heating, and the rapid heating requirement and the energy saving requirement of users are met.
Building thermal inertia index: a (W/m) 2 ) The factory parameter value is 0.6-2.0, and the default is 1.2, the indexes of the enclosure structure are different in each room, and the heat load of the room is influenced.
Further optionally, when there are a plurality of heating rooms, the step A2 includes the steps of:
a21, calculating the difference value between the environment temperature in the third room of each heating room and the corresponding indoor target temperature, and calculating the average value of all the difference values to obtain a second room temperature demand A 2 。
A22, according to the outdoor ambient temperature T Outer ring And a second room temperature requirement A 2 Determining the initial frequency f of the compressor 1 。
Further optionally, the compressor initial frequency corresponding to the outdoor ambient temperature and the second room temperature demand is looked up from a compressor initial frequency look-up table. Reference table 2 according to A 2 The section and the outdoor environment temperature value T currently detected Outer ring Determining the initial frequency f of the compressor in the interval 1 ；
TABLE 2 f1 value-taking Table
Figure BDA0003835273360000121
A23, according to f 1 Obtaining the target frequency f of the initialized compressor with the index a of thermal inertia of the building Target ；
f Target ＝f 1 *a。
It should be noted that the building thermal inertia index a of the embodiment is related to the thermal stability of the room enclosure, and the better the thermal stability of the enclosure is, the less the room is prone to heat dissipation, the smaller the required thermal load is, so the smaller the value a is; conversely, the poorer the thermal stability of the building envelope, the easier the room is to dissipate heat, and the greater the required thermal load, and therefore the greater the value of a. The initialization operation period is 15min, after 15min, the floor heating enters a stable operation stage, and the target frequency f 'of the compressor' Target And controlling according to the system target high pressure P.
Specifically, with reference to the schematic flow chart of fig. 5, in this embodiment, after the floor heating system is initially powered on, the room temperature is set by using the temperature wire controller, and the room that is not set is in the shutdown state, and is removed in subsequent calculations. The system predicts the dynamic heat load demand of a room by utilizing outdoor environment, room temperature demand and building heat inertia indexes, determines the target frequency of an initialization compressor, enables the frequency of the compressor to be matched with the heat load demand of the room, can relatively stably control the high pressure of the system, can quickly improve the room temperature and save energy, meets the requirement of quick temperature rise of a user at the initial heating stage, and is higher in comfort. Compressor at initialization target frequency f Target After 15min of operation, the system enters a stable control stage. In the stable control stage, the target frequency f 'of the compressor' Target High voltage per system target P Target And controlling to maintain the high pressure of the system to be stable. Meanwhile, the tail end of each fluorine capillary network is provided with the electronic expansion valve, and when the indoor environment temperature reaches the preset shutdown temperature, the electronic expansion valve is adjusted to maintain a smaller opening degree, so that the defect that the temperature is low is effectively reducedCompared with the common heating system, the room temperature control precision can be controlled within +/-1 ℃, frequent shutdown is avoided, and the comfort is higher.
The present embodiments also provide a warming control apparatus 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 the method of any one of the preceding paragraphs when the one or more processors execute the program instructions.
The present embodiment also provides a floor heating system that employs a method as described in any of the preceding paragraphs, or that includes a device as described in the preceding paragraphs.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims (11)

1. The floor heating control method is used for heating a heating room, and is characterized in that the floor heating comprises fluorine capillary network tail ends distributed in the heating room, and an electronic expansion valve for adjusting the flow of a refrigerant is correspondingly arranged at the tail end of each fluorine capillary network, and the control method comprises the following steps:
acquiring a first indoor environment temperature of the heating room and a corresponding preset shutdown temperature, and comparing the first indoor environment temperature with the corresponding preset shutdown temperature;
and when the first indoor environment temperature is greater than or equal to the preset shutdown temperature, controlling the electronic expansion valve corresponding to the tail end of the fluorine capillary network to be opened to a first preset opening a.
2. The control method according to claim 1, characterized by further comprising:
when the first indoor environment temperature is lower than the preset shutdown temperature, calculating a first difference value between the first indoor environment temperature and the corresponding indoor target temperature;
and controlling the opening of the electronic expansion valve corresponding to the tail end of the fluorine capillary network according to the first difference.
3. The control method according to claim 2, wherein the controlling of the opening degree of the electronic expansion valve corresponding to the end of the fluorine capillary network according to the first difference comprises:
when the first difference value is smaller than a first preset value and larger than or equal to a second preset value, controlling the electronic expansion valve to open a second preset opening b;
when the first difference value is smaller than the second preset value and larger than or equal to a third preset value, controlling the electronic expansion valve to open a third preset opening degree c;
when the first difference value is smaller than the third preset value, controlling the electronic expansion valve to open a fourth angle d;
wherein a is more than b and more than c is more than d.
4. A control method according to any one of claims 1 to 3, characterized in that the control method further comprises:
determining a target high pressure value P of the floor heating Target And acquiring the current actual high-voltage value P of the floor heating At present ；
According to the target high pressure value P Target And said actual high pressure value P At present The compressor frequency is adjusted.
5. The control method according to claim 4, wherein when there are a plurality of heating rooms, the target high voltage value P of the floor heating is determined Target The method comprises the following steps:
acquiring an outdoor ambient temperature and a second indoor ambient temperature of each heating room;
calculating second difference values of 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 first room temperature demand;
determining the target high pressure value P according to the first room temperature demand and the outdoor environment temperature Target 。
6. The control method according to claim 5, characterized in that said target high pressure value P is determined according to said first room temperature demand and said outdoor ambient temperature Target The method comprises the following steps:
searching a target high pressure value P corresponding to the first room temperature demand and the outdoor environment temperature from a target high pressure corresponding table Target 。
7. Control method according to claim 4, characterized in that said function is based on said target high pressure value P Target And said actual high pressure value P At present Adjusting a compressor frequency, comprising:
judging the actual high pressure value P At present And the target high pressure value P Target The interval in which the third difference value is located;
and adjusting the frequency of the compressor according to the interval where the third difference value is located.
8. The control method of claim 7, wherein said adjusting the compressor frequency according to the interval in which the third difference is located comprises:
when the third difference value is smaller than a first preset threshold value, controlling the compressor to increase the frequency by a first increment delta 1;
when the third difference value is greater than or equal to the first preset threshold value and less than a second preset threshold value, controlling the compressor to increase the frequency by a second increment delta 2;
when the third difference value is greater than or equal to a second preset threshold value and less than a third preset threshold value, controlling the compressor to increase the frequency by a third increment delta 3;
when the third difference is greater than or equal to a third preset threshold and less than a fourth preset threshold, inhibiting frequency boosting;
when the third difference is greater than or equal to the fourth preset threshold and less than a fifth preset threshold, controlling the compressor to reduce the frequency by a fourth increment delta 4;
when the third difference is greater than or equal to the fifth preset threshold, controlling the compressor to reduce the frequency by a fifth increment delta 5;
wherein, delta 1 is more than Delta 2 and more than Delta 3 and more than 0, and Delta 4 is more than 0 and less than Delta 5.
9. Control method according to claim 4, characterized in that the target high pressure value P of the floor heating is determined Target Before, the control method further includes:
acquiring an outdoor environment temperature, a third indoor environment temperature and a corresponding indoor target temperature;
determining an initialization compressor target frequency according to the outdoor environment temperature, the third indoor environment temperature, the corresponding indoor target temperature and the building thermal inertia index;
and controlling the compressor to operate according to the initialization target frequency.
10. A warming control apparatus 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 the method of any one of claims 1-9 when the program instructions are executed by the one or more processors.
11. A floor heating, characterized in that it employs a method according to any one of claims 1-9 or comprises a device according to claim 10.
CN202211086301.1A 2022-09-06 2022-09-06 Floor heating control method and device and floor heating Pending CN115419937A (en)

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CN202211086301.1A CN115419937A (en) 2022-09-06 2022-09-06 Floor heating control method and device and floor heating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211086301.1A CN115419937A (en) 2022-09-06 2022-09-06 Floor heating control method and device and floor heating

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