A floor heating control method, a control device and a floor heating

Abstract

The present invention provides a floor heating control method, a control device and a floor heating. The control method includes: obtaining a first indoor ambient temperature and a corresponding preset shutdown temperature, and comparing the first indoor ambient temperature with the corresponding preset shutdown temperature; when the first indoor ambient temperature is greater than or equal to the preset shutdown temperature, controlling the electronic expansion valve at the end of the corresponding fluorine capillary network to open to a first preset opening. Through the control method of the present invention, when the indoor ambient temperature reaches the preset shutdown temperature, the electronic expansion valve is maintained at a relatively small opening, which can effectively reduce the room temperature fluctuation caused by the shutdown at the temperature point, avoid frequent shutdowns, and the room temperature control accuracy can be controlled within ±1°C compared to ordinary heating systems, which is more comfortable.

Description

Technical Field

[0001] The present invention belongs to the field of air conditioning, and in particular relates to a floor heating control method, a control device and floor heating. Background Art

[0002] There are many different types of home heating systems and forms, the most common ones include floor heating, capillary networks, and fan coils.

[0003] The capillary radiation air conditioning system (water) adopts the human bionic principle of capillary grid to transmit cold and heat, which can effectively utilize low-grade energy to achieve energy saving and comfort effects; as an upgraded product of ordinary floor heating radiation, it has been widely used in foreign hotels, apartments, villas, public facilities, etc.; the end of the fluorine capillary network is similar to the water capillary network, and has the excellent characteristics of the above system, and there is only one heat exchange with the refrigerant, and the theoretical operating energy efficiency is higher than that of the water system. In the fluorine capillary network multi-split heating system, it will generally shut down after the indoor temperature reaches the set temperature, which will cause large fluctuations in room temperature and frequent startup and shutdown problems, affecting user comfort. Summary of the invention

[0004] In view of this, the present invention discloses a floor heating control method, a control device and a floor heating, which are used to solve the problem of frequent start and stop in a fluorine capillary network multi-split heating system.

[0005] In order to solve the above technical problems, the present invention provides a floor heating control method, the floor heating is used to heat the heating room, the floor heating includes fluorine capillary network ends distributed in the heating room, each fluorine capillary network end is correspondingly provided with an electronic expansion valve for adjusting the refrigerant flow rate thereof, and the control method includes:

[0006] Acquire a first indoor ambient temperature of the heating room and a corresponding preset shutdown temperature, and compare the first indoor ambient temperature with the corresponding preset shutdown temperature;

[0007] When the first indoor ambient temperature is greater than or equal to the preset shutdown temperature, the electronic expansion valve at the end of the corresponding fluorine capillary network is controlled to open to a first preset opening a.

[0008] Further optionally, the control method further includes:

[0009] When the first indoor environment temperature is lower than the preset shutdown temperature, calculating a first difference between the first indoor environment temperature and the corresponding indoor target temperature;

[0010] According to the first difference, the electronic expansion valve at the end of the corresponding fluorine capillary network is controlled to open to a corresponding degree.

[0011] Further optionally, according to the interval in which the first difference value is located, the electronic expansion valve at the end of the corresponding fluorine capillary network is controlled to open to a corresponding opening, including:

[0012] When the first difference is less than the first preset value and greater than or equal to the second preset value, the electronic expansion valve is controlled to open to a second preset opening degree b;

[0013] When the first difference is less than the second preset value and greater than or equal to the third preset value, the electronic expansion valve is controlled to open to a third preset opening degree c;

[0014] When the first difference is less than the third preset value, the electronic expansion valve is controlled to open to a fourth opening degree d;

[0015] Among them, a<b<c<d.

[0016] Further optionally, the control method further includes: determining a target high pressure value P for floor heating 目标 , and obtain the actual high pressure value P of the floor heating 当前 ;

[0017] According to the target high pressure value P 目标 And the actual high pressure value P 当前 The compressor frequency is adjusted to adjust the room temperature of each heating room.

[0018] Further optionally, when there are multiple heating rooms, the target high pressure value P of the floor heating is determined 目标 ,include:

[0019] Obtaining the outdoor ambient temperature and the second indoor ambient temperature of each heating room;

[0020] Calculate the second difference between the second indoor ambient temperature of each heating room and the corresponding indoor target temperature, and calculate the average value of all the second differences to obtain the first room temperature demand;

[0021] Determine the target high pressure value P according to the first room temperature demand and the outdoor ambient temperature 目标 .

[0022] Further optionally, the target high pressure value P is determined according to the room temperature demand and the outdoor ambient temperature. 目标 ,include:

[0023] Find the target high pressure value P corresponding to the first room temperature demand and the outdoor ambient temperature from the target high pressure correspondence table 目标 .

[0024] Further optionally, according to the target high pressure value P 目标 And the actual high pressure value P 当前 Adjust the compressor frequency, including:

[0025] Determine the actual high pressure value P 当前 With the target high pressure value P 目标 The interval in which the third difference of is located;

[0026] The compressor frequency is adjusted according to the interval in which the third difference value is located.

[0027] Further optionally, adjusting the compressor frequency according to the interval in which the third difference value is located includes:

[0028] When the third difference is less than the first preset threshold, the compressor is controlled to increase the frequency by a first increment Δ1;

[0029] When the third difference is greater than or equal to the first preset threshold and less than the second preset threshold, the compressor is controlled to increase the frequency by a second increment Δ2;

[0030] When the third difference is greater than or equal to the second preset threshold and less than the third preset threshold, the compressor is controlled to increase the frequency by a third increment Δ3;

[0031] When the third difference is greater than or equal to the third preset threshold and less than the fourth preset threshold, frequency upscaling is prohibited;

[0032] When the third difference is greater than or equal to the fourth preset threshold and less than the fifth preset threshold, the compressor is controlled to reduce the frequency by a fourth increment Δ4;

[0033] When the third difference is greater than or equal to a fifth preset threshold, the compressor is controlled to reduce the frequency by a fifth increment Δ5;

[0034] Among them, Δ1>Δ2>Δ3>0, 0<Δ4<Δ5.

[0035] Further optionally, when determining the target high pressure value P of the floor heating 目标 Before, the control method also includes:

[0036] Obtaining the outdoor ambient temperature, the third indoor ambient temperature and the corresponding indoor target temperature;

[0037] Determining an initialization compressor target frequency according to the outdoor ambient temperature, the third indoor ambient temperature, the corresponding indoor target temperature, and the building thermal inertia index;

[0038] Control the compressor to start and run according to the initialized target frequency.

[0039] The present invention also provides a floor heating control device, which includes one or more processors and a non-temporary computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement any of the methods described above.

[0040] The present invention also provides a floor heating, which adopts any method as described above, or includes the device as described above.

[0041] After adopting the above technical solution, the present invention has the following beneficial effects:

[0042] In the present invention, an electronic expansion valve is arranged at the end of each capillary network. When the indoor ambient temperature reaches the preset shutdown temperature, the electronic expansion valve maintains a relatively small opening, which can effectively reduce the room temperature fluctuation caused by the shutdown at the temperature point and avoid frequent shutdowns. Compared with ordinary heating systems, the room temperature control accuracy can be controlled within ±1°C, which is more comfortable.

[0043] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0045] Figure 1 A schematic structural diagram of floor heating according to an embodiment of the present invention is shown.

[0046] Figure 2 A schematic flow chart of a floor heating control method according to an embodiment of the present invention is shown.

[0047] Figure 3 A schematic flow chart of a floor heating control method according to an embodiment of the present invention is shown.

[0048] Figure 4 A schematic flow chart of a floor heating control method according to an embodiment of the present invention is shown.

[0049] Figure 5 A schematic flow chart of a floor heating control method according to an embodiment of the present invention is shown.

[0050] Among them: 1- compressor, 2- oil separator, 3- four-way valve, 4- outdoor heat exchanger, 5- outdoor fan, 6- outdoor throttling device, 7- subcooler, 8- subcooling electronic expansion valve, 9- gas-liquid separator, 10- oil return solenoid valve, 11- gas pipe valve, 12- liquid pipe valve, 13- capillary network, 14- electronic expansion valve.

[0051] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "contacted", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In a fluorine capillary network multi-split heating system, the system will generally shut down after the indoor temperature reaches the set temperature, which will cause large fluctuations in the room temperature and frequent startup and shutdown problems, affecting user comfort. To solve the above problems, this embodiment provides a floor heating control method. Floor heating is used to heat the heating room, which can be one or more rooms. The floor heating includes fluorine capillary network terminals distributed in the heating rooms. The fluorine capillary network terminals directly transport the high-temperature and high-pressure gaseous refrigerant discharged from the air-conditioning system compressor to the required room through a pipeline, and then release it to the room through enclosure structures such as the floor.

[0055] Combination Figure 1 The structural diagram of the floor heating of this embodiment includes: a compressor 1 and a gas side pipe and a liquid side pipe arranged in parallel at the outlet of the compressor 1;

[0056] The outdoor heat exchanger 4 is arranged on the liquid side pipe;

[0057] A plurality of fluorine capillary network terminals 13 are arranged in parallel on the gas side pipe and the liquid side pipe, wherein each fluorine capillary network terminal 13 is correspondingly provided with an electronic expansion valve 14 for adjusting the refrigerant flow rate thereof.

[0058] In addition, the floor heating of this embodiment also includes:

[0059] 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;

[0060] A four-way valve 3, 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 to the compressor 1, the second interface is connected to the outdoor heat exchanger 4, and the fourth interface is connected to the gas side pipe;

[0061] A subcooler 7, wherein the subcooler 7 is arranged on the liquid side pipe;

[0062] One end of the liquid side pipe connected to the gas-liquid separator 9 is provided with a refrigerant branch, and a subcooler electronic expansion valve 8 is provided on the refrigerant branch;

[0063] An outdoor throttling device 6 is provided on the liquid side pipe between the subcooler 7 and the outdoor heat exchanger 4, which may be specifically an electronic expansion valve.

[0064] In addition, an air pipe valve 11 is provided on the air test pipe to control its on and off, a liquid pipe valve 12 is provided on the liquid side pipe to control its on and off, a first pipeline is connected between the oil separator 2 and the compressor 1 through a capillary tube, and a second pipeline is connected in parallel with the first pipeline, and a return oil solenoid valve 10 is provided on the second pipeline.

[0065] The floor heating of this embodiment is equipped with an electronic expansion valve at the end of each fluorine capillary network. When the indoor ambient temperature reaches the preset shutdown temperature, the electronic expansion valve is controlled to maintain a smaller opening, which can effectively reduce the room temperature fluctuation caused by the temperature point startup and shutdown. The room temperature control accuracy can be controlled within ±1°C compared with ordinary heating systems, which is more comfortable.

[0066] The floor heating control method according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0067] Combination Figure 2 The control method of this embodiment includes S1 to S2, wherein:

[0068] S1, obtaining a first indoor ambient temperature and a corresponding preset shutdown temperature of a heating room, and comparing the first indoor ambient temperature with the corresponding preset shutdown temperature;

[0069] Specifically, there are at most n rooms, and each capillary network end is laid in one room. When the user turns on the power for the first time, he uses the room temperature wire controllers of each capillary network in the room to set the room temperature. The room without setting is in the off state, and is excluded from various subsequent calculations.

[0070] The preset shutdown temperature is generally the indoor target temperature + 1 (℃).

[0071] S2, when the first indoor ambient temperature is greater than or equal to the preset shutdown temperature, the electronic expansion valve at the end of the corresponding fluorine capillary network is controlled to open to a first preset opening a. The first indoor ambient temperature is not a fixed value. In this embodiment, in order to avoid frequent shutdowns due to the room temperature reaching the preset shutdown temperature, the first indoor ambient temperature is collected once every certain time interval (for example, 1 minute).

[0072] The preset shutdown temperature is equal to the indoor target temperature plus an increment Δx, wherein Δx is greater than or equal to 0, and generally, Δx is 1°C.

[0073] After the room temperature exceeds the target temperature by 1°C, the previous room temperature control method will immediately shut down the indoor unit and stop providing heat to the room. At this time, the room temperature drops due to the continuous heat leakage from the room to the outside. After the room temperature drops to the target room temperature by 1°C, the indoor unit is turned on to resume heating the room. Due to the delay of the control system, the actual room temperature fluctuates greatly, generally 2-5°C, affecting the comfort effect. In this embodiment, an electronic expansion valve is configured at the end of each fluorine capillary network. Here, the electronic expansion valve is kept at a relatively small opening (i.e., the first preset opening, which is preferably 80B in this embodiment), which can reduce the slow drop of the room temperature, thereby effectively reducing the room temperature fluctuation caused by the temperature point start and stop. Compared with the ordinary heating system, the room temperature control accuracy can be controlled within ±1°C, and the comfort is higher.

[0074] Further optionally, in combination Figure 3 The control method of this embodiment further includes steps S3 to S4, wherein:

[0075] S3, when the first indoor ambient temperature is lower than the preset shutdown temperature, calculating a first difference between the first indoor ambient temperature and the corresponding indoor target temperature;

[0076] S4, controlling the electronic expansion valve at the end of the corresponding fluorine capillary network to open to a corresponding opening according to the first difference.

[0077] When the first indoor ambient temperature is lower than the preset shutdown temperature, the first difference between the first indoor ambient temperature and the corresponding indoor target temperature is calculated. The first difference reflects the current room temperature demand, thereby adjusting the opening of the electronic expansion valve to achieve precise temperature control and improve heating comfort.

[0078] Further optionally, in combination Figure 3 Schematic diagram of the process, in one implementation of this embodiment, S4 includes S41 to S43, wherein:

[0079] S41, when the first difference is less than the first preset value and greater than or equal to the second preset value, controlling the electronic expansion valve to open to a second preset opening degree b;

[0080] S42, when the first difference is less than the second preset value and greater than or equal to the third preset value, controlling the electronic expansion valve to open to a third preset opening degree c;

[0081] S43, when the first difference is less than a third preset value, controlling the electronic expansion valve to open to a fourth opening degree d;

[0082] Among them, a<b<c<d.

[0083] Specifically, the preset shutdown temperature is the indoor target temperature + 1°C, the first preset value is 1°C, the second preset value is 0°C, and the third preset value is -1°C, but not limited thereto. Take room 1 as an example for explanation:

[0084] If 1℃≤T 1 -T m1 , then the capillary electronic expansion valve of the room maintains an opening of 80B (maintaining a small number of steps);

[0085] If 0℃≤T 1 -T m1 <1℃, the capillary electronic expansion valve of the room maintains an opening of 240B;

[0086] If -1℃≤T 1 -T m1 <0℃, the capillary electronic expansion valve of the room maintains an opening of 360B;

[0087] If T 1 -T m1 <-1℃, the capillary electronic expansion valve of the room maintains an opening of 480B (fully open).

[0088] Further optionally, the control method of this embodiment further includes steps S5 to S6, wherein:

[0089] S5, determine the target high pressure value P of the floor heating 目标 , and obtain the current actual high voltage value P 当前 ;

[0090] The actual high pressure value P here 当前 Refers to the compressor exhaust pressure when the system is running. Target high pressure value P 目标 Refers to the target value of the compressor exhaust pressure during operation. The system target high pressure value P is updated once according to the preset time interval. 目标 , according to the target high pressure value P 目标 Adjust the compressor frequency to control the system high pressure relatively stably, thereby accurately controlling the room temperature.

[0091] Further optionally, in combination Figure 4 Flow chart of the present invention, when there are multiple heating rooms, the target high pressure value P of the floor heating is determined in step S5. 目标 , including S51 to S53, among which:

[0092] S51, obtaining the outdoor ambient temperature and the second indoor ambient temperature of each heating room;

[0093] Specifically, when determining the system target high pressure value P 目标 When the outdoor temperature sensing package is used to collect the outdoor ambient temperature, the indoor temperature sensing package is used to obtain the second indoor ambient temperature.

[0094] S52, calculating a second difference between the second indoor ambient temperature of each heating room and the corresponding indoor target temperature, and calculating an average value of all the second differences to obtain a first room temperature demand;

[0095] Target temperature setting for each heating room: T m1 、T m2 、T m3 、···T mn ;

[0096] Real-time value of room temperature detection in each heating room: T 1 、T 2 、T 3 、···T n ;

[0097] Outdoor ambient temperature detection real-time value: T 外环 ;

[0098] There are at most n rooms, and here we only explain it based on 3 rooms, and each end of the capillary network is laid in 1 room;

[0099] A 1 =((T m1 -T 1 )+(T m2 -T 2 )+(T m3 -T 3 )) / 3;

[0100] Among them, A 1 Indicates the first room temperature demand.

[0101] S53, determining a target high pressure value P according to the first room temperature demand and the outdoor ambient temperature 目标 .

[0102] Further optionally, in an implementation of this embodiment, S53 is specifically:

[0103] Find the target high pressure value P corresponding to the first room temperature demand and the outdoor ambient temperature from the target high pressure correspondence table 目标 . Further optionally, the target high pressure correspondence table is shown in Table 1,

[0104] Table 1 Target high pressure correspondence table

[0105]

[0106] S6, according to the target high pressure value P 目标 And the actual high pressure value P 当前 Adjust the compressor frequency;

[0107] In this embodiment, combined with Figure 5Flow diagram of the compressor target frequency f′ 目标 According to the system target high pressure value P 目标 Control is performed to maintain the system high pressure stable, thereby maintaining the room temperature stable and avoiding room temperature fluctuations.

[0108] Further optionally, in combination Figure 4 Schematic diagram of the process, step S6 includes S61-S62, wherein:

[0109] S61, judging the actual high pressure value P 当前 With the target high pressure value P 目标 The interval in which the third difference of is located;

[0110] S62, adjusting the compressor frequency according to the interval in which the third difference value is located;

[0111] The actual high pressure value is coded as P, in degrees Celsius, which is the temperature value converted from the refrigerant saturation temperature corresponding to the system high pressure;

[0112] In order to maintain the indoor temperature in a steady state, that is, the indoor temperature fluctuates around the indoor target temperature, the actual high pressure value P of the system is used. 当前 With the target high pressure value P 目标 The difference between them (recorded as the third difference) is used to fine-tune the existing frequency of the compressor.

[0113] Specifically, by determining the interval in which the third difference value is located, an adjustment increment (in unit: hz) corresponding to the interval is obtained to fine-tune the existing frequency of the compressor.

[0114] Further optionally, in an implementation of this embodiment,

[0115] When the third difference is less than the first preset threshold, the compressor is controlled to increase the frequency by a first increment Δ1;

[0116] When the third difference is greater than or equal to the first preset threshold and less than the second preset threshold, the compressor is controlled to increase the frequency by a second increment Δ2;

[0117] When the third difference is greater than or equal to the second preset threshold and less than the third preset threshold, the compressor is controlled to increase the frequency by a third increment Δ3;

[0118] When the third difference is greater than or equal to the third preset threshold and less than the fourth preset threshold, frequency upscaling is prohibited;

[0119] When the third difference is greater than or equal to the fourth preset threshold and less than the fifth preset threshold, the compressor is controlled to reduce the frequency by a fourth increment Δ4;

[0120] When the third difference is greater than or equal to the fifth preset threshold, the compressor is controlled to reduce the frequency by a fifth increment Δ5;

[0121] Among them, Δ1>Δ2>Δ3>0, 0<Δ4<Δ5.

[0122] Specifically, the compressor target frequency f′ 目标 According to the target high pressure value P of floor heating 目标 The following control is updated every 1 minute, wherein the first preset threshold is preferably -8°C, the second preset threshold is preferably -3°C, the third preset threshold is preferably -1°C, the fourth preset threshold is preferably 0°C, and the fifth preset threshold is preferably 1°C:

[0123] If P 当前 -P 目标 <-8℃, the compressor frequency will be increased by 8hz on the existing basis;

[0124] If -8℃≤P 当前 -P 目标 <-3℃, the compressor frequency will be increased by 5hz on the existing basis;

[0125] If -3℃≤P 当前 -P 目标 <-1℃, the compressor frequency will be increased by 3hz on the existing basis;

[0126] If -1℃≤P 当前 -P 目标 <0℃, the compressor frequency maintains the current frequency and frequency increase is prohibited;

[0127] If 0℃≤P 当前 -P 目标 <1℃, the compressor frequency will be reduced by 3hz on the existing basis;

[0128] If 1℃≤P 当前 -P 目标 , the compressor frequency will be reduced by 7hz on the existing basis.

[0129] The floor heating control method of this embodiment controls the compressor frequency with the system target high pressure value, which can maintain the high pressure stability of the system. On this basis, an electronic expansion valve is configured at the end of each fluorine capillary network. When the indoor ambient temperature reaches the preset shutdown temperature, the electronic expansion valve is adjusted to maintain a small opening, which effectively reduces the room temperature fluctuation caused by the temperature point shutdown. Compared with ordinary heating systems, the room temperature control accuracy can be controlled within ±1°C, avoiding frequent shutdowns and providing higher comfort.

[0130] Further optionally, when determining the target high pressure value P of the floor heating 目标 Before, the control method further comprises the following steps:

[0131] A1, obtain the outdoor ambient temperature, the third indoor ambient temperature of the heating room and the corresponding indoor target temperature; wherein the third indoor ambient temperature is not a fixed value, and in this embodiment it can be detected in real time or once every certain period of time.

[0132] A2, determining an initialization compressor target frequency according to the outdoor ambient temperature, the third indoor ambient temperature, the corresponding indoor target temperature, and the building thermal inertia index;

[0133] A3, controls the compressor to operate according to the initialized target frequency.

[0134] Specifically, combined Figure 5 Flow chart of the process. During the operation of floor heating, especially in its initialization stage, the dynamic heat load demand of the room is predicted by using the outdoor environment, room temperature demand, and building thermal inertia index, and the initialization compressor target frequency f is determined accordingly. 目标 , so that the compressor frequency matches the room heat load demand, so that the system high pressure can be controlled relatively stably, the temperature rises quickly, and energy can be saved at the same time.

[0135] Specifically, after the floor heating is powered on, the host executes the initialization program, the compressor 1 starts and runs according to the initialization target frequency. The heating electronic expansion valve 6 is controlled according to the initialization step number, the outdoor fan 5 is controlled according to the maximum speed, and the subcooler 7 is not turned on in the heating mode, that is, the subcooling electronic expansion valve 8 is closed. In this way, rapid heating and energy saving can be achieved in the early stage of fluorine floor heating, meeting the user's demand for rapid heating and energy saving.

[0136] Building thermal inertia index: a(W / m 2 ), the manufacturer's parameter value is 0.6-2.0, and the default is 1.2. The indicators of the enclosure structure are different in each room, which affects the room heat load.

[0137] Further optionally, when there are multiple heating rooms, step A2 includes the following steps:

[0138] A21, calculate the difference between the third indoor ambient temperature of each heating room and the corresponding indoor target temperature, and calculate the average value of all the differences to obtain the second room temperature demand A 2 .

[0139] A22, according to the outdoor ambient temperature T 外环 and the second room temperature demand A 2 Determine the initial frequency f of the compressor 1 .

[0140] Further optionally, the initial frequency of the compressor corresponding to the outdoor ambient temperature and the second room temperature demand is searched from the initial frequency comparison table of the compressor. 2The interval and the currently detected outdoor ambient temperature value T 外环 The interval determines the initial frequency f of the compressor 1 ;

[0141] Table 2 f1 value table

[0142]

[0143] A23, according to f 1 Get the initialization compressor target frequency f with the building thermal inertia index a 目标 ;

[0144] f 目标 =f 1 *a.

[0145] It should be noted that the building thermal inertia index a in this embodiment is related to the thermal stability of the room enclosure structure. The better the thermal stability of the enclosure structure, the less likely the room is to dissipate heat, the smaller the required heat load, and therefore the smaller the a value; conversely, the worse the thermal stability of the enclosure structure, the easier the room is to dissipate heat, the greater the required heat load, and therefore the greater the a value. The initialization operation cycle is 15 minutes. After 15 minutes, the floor heating enters the stable operation stage, and the compressor target frequency f′ 目标 Control is performed according to the system target high pressure P.

[0146] Specifically, combined Figure 5 Flow chart of the process. In this embodiment, after the floor heating is initially powered on, the room temperature is set using the temperature line controller. Rooms that are not set are in the off state and are excluded from subsequent calculations. The floor heating executes the initialization procedure. The system uses the outdoor environment, room temperature requirements, and building thermal inertia indicators to predict the dynamic heat load requirements of the room, thereby determining the initialization compressor target frequency so that the compressor frequency matches the room heat load requirements, thereby being able to control the system high pressure relatively stably, while being able to quickly increase the room temperature and save energy, meeting the user's needs for rapid temperature rise in the initial stage of heating, and providing higher comfort. The compressor is initialized at the target frequency f 目标 After running for 15 minutes, the system enters the stable control stage. In the stable control stage, the compressor target frequency f′ 目标 According to the system target high pressure P 目标 At the same time, an electronic expansion valve is configured at the end of each fluorine capillary network. When the indoor ambient temperature reaches the preset shutdown temperature, the electronic expansion valve is adjusted to maintain a small opening, effectively reducing the room temperature fluctuation caused by the temperature point. Compared with ordinary heating systems, the room temperature control accuracy can be controlled within ±1°C, avoiding frequent shutdowns and providing higher comfort.

[0147] This embodiment also provides a floor heating control device, which includes one or more processors and a non-temporary computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement any of the methods described above.

[0148] This embodiment also provides a floor heating, which adopts any method as described above, or includes the device as described above.

[0149] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0150] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0151] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A method for controlling floor heating, wherein the floor heating is used to heat a heating room, characterized in that: The floor heating system comprises a compressor and a gas side pipe and a liquid side pipe arranged in parallel at the compressor outlet, fluorine capillary network ends distributed in the heating room and arranged on the gas side pipe and the liquid side pipe, each fluorine capillary network end is correspondingly provided with an electronic expansion valve for adjusting the refrigerant flow rate thereof, an outdoor heat exchanger and a subcooler arranged on the liquid side pipe, and an outdoor throttling device arranged on the liquid side pipe between the outdoor subcooler and the outdoor heat exchanger, and the control method comprises: Acquire a first indoor ambient temperature of the heating room and a corresponding preset shutdown temperature, and compare the first indoor ambient temperature with the corresponding preset shutdown temperature; When the first indoor ambient temperature is greater than or equal to the preset shutdown temperature, the electronic expansion valve at the end of the corresponding fluorine capillary network is controlled to open to a first preset opening a; When the first indoor environment temperature is lower than the preset shutdown temperature, calculating a first difference between the first indoor environment temperature and a corresponding indoor target temperature; According to the first difference, the electronic expansion valve at the end of the corresponding fluorine capillary network is controlled to open to a corresponding opening degree; The control method also includes an initialization phase and a stable control phase; During the initialization phase: Controlling the outdoor throttling device to an initialization step number, controlling the outdoor fan of the outdoor heat exchanger to a maximum speed, controlling the subcooler not to open, and, Obtaining the outdoor ambient temperature, the third indoor ambient temperature and the corresponding indoor target temperature; Determining an initialization compressor target frequency according to the outdoor ambient temperature, the third indoor ambient temperature, the corresponding indoor target temperature, and the building thermal inertia index; Controlling the compressor to operate an initialization operation cycle according to the initialization compressor target frequency; During the stabilization control phase: Determine the target high pressure value P of the floor heating 目标 , and obtain the actual high pressure value P of the floor heating 当前 ; According to the target high pressure value P 目标 and the actual high pressure value P 当前 Adjust the compressor frequency.

2. The control method according to claim 1, characterized in that: The method of controlling the electronic expansion valve at the end of the corresponding fluorine capillary network to open a corresponding opening according to the first difference includes: When the first difference is less than a first preset value and greater than or equal to a second preset value, controlling the electronic expansion valve to open to a second preset opening degree b; When the first difference is less than the second preset value and greater than or equal to a third preset value, controlling the electronic expansion valve to open to a third preset opening degree c; When the first difference is less than the third preset value, controlling the electronic expansion valve to open to a fourth opening degree d; Among them, a<b<c<d.

3. The control method according to claim 1, characterized in that: When there are multiple heating rooms, the target high pressure value P of the floor heating is determined. 目标 ,include: Acquiring the outdoor ambient temperature and the second indoor ambient temperature of each of the heating rooms; Calculating a second difference between the second indoor ambient temperature of each of the heating rooms and the corresponding indoor target temperature, and calculating an average value of all the second differences to obtain a first room temperature demand; Determine the target high pressure value P according to the first room temperature demand and the outdoor ambient temperature 目标 .

4. The control method according to claim 3, characterized in that: The target high pressure value P is determined according to the first room temperature demand and the outdoor ambient temperature 目标 ,include: The target high pressure value P corresponding to the first room temperature demand and the outdoor ambient temperature is searched from the target high pressure correspondence table. 目标 .

5. The control method according to claim 1, characterized in that: According to the target high pressure value P 目标 and the actual high pressure value P 当前 Adjust the compressor frequency, including: Determine the actual high pressure value P 当前 With the target high pressure value P 目标 The interval in which the third difference of is located; The compressor frequency is adjusted according to the interval in which the third difference value is located.

6. The control method according to claim 5, characterized in that: The adjusting the compressor frequency according to the interval in which the third difference value is located includes: When the third difference is less than the first preset threshold, the compressor is controlled to increase the frequency by a first increment Δ1; When the third difference is greater than or equal to the first preset threshold and less than the second preset threshold, the compressor is controlled to increase the frequency by a second increment Δ2; When the third difference is greater than or equal to the second preset threshold and less than the third preset threshold, the compressor is controlled to increase the frequency by a third increment Δ3; When the third difference is greater than or equal to a third preset threshold and less than a fourth preset threshold, frequency upscaling is prohibited; When the third difference is greater than or equal to the fourth preset threshold and less than the fifth preset threshold, the compressor is controlled to reduce the frequency by a fourth increment Δ4; When the third difference is greater than or equal to the fifth preset threshold, the compressor is controlled to reduce the frequency by a fifth increment Δ5; Among them, Δ1>Δ2>Δ3>0, 0<Δ4<Δ5.

7. A floor heating control device, characterized in that: It includes one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method according to any one of claims 1-6.

8. A floor heating system, characterized in that: It adopts the method according to any one of claims 1 to 6, or includes the device according to claim 7.

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