CN107477805B - Multi-split air-conditioning floor heating system and control method thereof - Google Patents
Multi-split air-conditioning floor heating system and control method thereof Download PDFInfo
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- CN107477805B CN107477805B CN201710819749.2A CN201710819749A CN107477805B CN 107477805 B CN107477805 B CN 107477805B CN 201710819749 A CN201710819749 A CN 201710819749A CN 107477805 B CN107477805 B CN 107477805B
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Abstract
The embodiment of the invention provides a multi-split air-conditioning floor heating system and a control method thereof, relates to the technical field of air conditioners, and can improve the heating effect of the multi-split air-conditioning floor heating system and improve the user experience. The control method comprises the following steps: acquiring the current opening of a throttling element of a floor heating water utilization module and the difference value between the set temperature and the return air temperature of each current heating air conditioner indoor unit; acquiring temperature difference characterization parameters according to the plurality of difference values; acquiring the opening degree adjustment quantity of the throttling element according to the corresponding relation between the temperature difference characterization parameter and the opening degree adjustment quantity; acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as an updated opening; controlling the throttling element to throttle with the updated opening degree; the current opening degree is the updated opening degree; the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit is obtained, and the throttling element is controlled to throttle by the updated opening degree to form a first period; then, after the preset time length, a first period is executed. The invention is used for air conditioners.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner floor heating system and a control method thereof.
Background
The multi-split air conditioner is more and more widely applied due to the advantages of energy conservation, environmental protection, convenience in installation and use and the like. Along with the improvement of science and technology, people demand comfort level, air quality more and more high, especially heat winter, compare with traditional air conditioner power wind heating form, the heating of warming up that the comfort level is higher receives user's favor widely. In order to meet higher requirements of users and have the advantages of multi-split air conditioning and floor heating, a multi-split air conditioning and floor heating system which integrates the multi-split air conditioning and the floor heating is available in the market, and the multi-split air conditioning and floor heating system has a structure shown in fig. 1 and comprises an air conditioning outdoor unit 101, a plurality of air conditioning indoor units 102 (the description is given by taking 3 air conditioning indoor units as an example in fig. 1) and a floor heating water module 103. The floor heating water module 103 and the air-conditioning indoor units 102 are connected with the air-conditioning outdoor unit 101, cold and heat sources are provided for the floor heating water module 103 and the air-conditioning indoor units 102 by the air-conditioning outdoor unit 101, and the advantages of multi-split products and floor heating are brought into play.
However, in the prior art, when the multi-split air-conditioning floor heating system heats, if only the floor heating water module 103 is turned on to heat, it generally takes 2-3 hours to reach the set temperature; if only the indoor air conditioner 102 is turned on for heating, it generally takes 30 minutes to reach the set temperature. If the air-conditioning indoor unit 102 and the floor heating water module 103 are simultaneously started for heating, the refrigerant quantity reaching the air-conditioning indoor unit 102 and the floor heating water module 103 is uniformly divided in the prior art, so that the room temperature can not be rapidly set at the initial heating stage by utilizing the air-conditioning indoor unit 102, and the room temperature can not be well maintained at the later heating stage by utilizing the floor heating water module 103, and therefore the heating effects of the air-conditioning indoor unit 102 and the floor heating water module 103 are poor, and further the user experience is poor.
Disclosure of Invention
The embodiment of the invention provides a multi-split air-conditioning floor heating system and a control method thereof, which can improve the heating effect of the multi-split air-conditioning floor heating system and improve the user experience when an air-conditioning indoor unit and a floor heating water module are used for heating simultaneously.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
on one hand, the embodiment of the invention provides a control method of a multi-split air-conditioning floor heating system, the multi-split air-conditioning floor heating system comprises an air-conditioning outdoor unit, a floor heating water module and a plurality of air-conditioning indoor units, the floor heating water module and the air-conditioning indoor units are both connected with the air-conditioning outdoor unit, and the control method comprises the following steps:
when at least one air-conditioning indoor unit and the floor heating water module are heated simultaneously, acquiring the current opening of a throttling element of the floor heating water module and the difference value between the set temperature of each air-conditioning indoor unit which is heated currently and the return air temperature;
obtaining a temperature difference characterization parameter according to the plurality of difference values;
acquiring the opening degree adjustment quantity of the throttling element according to the corresponding relation between the temperature difference characterization parameter and the opening degree adjustment quantity; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation;
acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as an updated opening;
when the updated opening degree is smaller than or equal to the maximum opening degree of the throttling element and larger than or equal to the minimum opening degree of the throttling element, controlling the throttling element to throttle at the updated opening degree; the current opening degree is the updated opening degree; the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit is obtained, and the throttling element is controlled to throttle by the updated opening degree to be a first period;
and executing the first period after the preset time length.
On the other hand, an embodiment of the present invention provides a multi-split air-conditioning floor heating system, including an air-conditioning outdoor unit, a floor heating water module, and a plurality of air-conditioning indoor units, where the floor heating water module and the air-conditioning indoor units are both connected to the air-conditioning outdoor unit, and further including:
the first acquisition unit is used for acquiring the current opening of a throttling element of the floor heating water module and the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit when at least one air-conditioning indoor unit and the floor heating water module are heated simultaneously;
the second obtaining unit is used for obtaining temperature difference characterization parameters according to the difference values;
the third obtaining unit is used for obtaining the opening degree adjustment quantity of the throttling element according to the corresponding relation between the temperature difference representation parameter and the opening degree adjustment quantity; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation;
a fourth obtaining unit, configured to obtain a sum of the current opening degree and the opening degree adjustment amount, and use the sum as an updated opening degree;
a control unit configured to control the throttling element to throttle at the updated opening degree when the updated opening degree is less than or equal to a maximum opening degree of the throttling element and greater than or equal to a minimum opening degree of the throttling element; the current opening degree is the updated opening degree; the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit is obtained, and the throttling element is controlled to throttle by the updated opening degree to be a first period;
the control unit is further configured to execute the first period after a preset duration.
On the other hand, the embodiment of the invention provides a multi-split air-conditioning floor heating system which comprises an air-conditioning outdoor unit, a floor heating water module, a plurality of air-conditioning indoor units, a processor, a memory and a controller of a throttling element of the floor heating water module, wherein the floor heating water module and the air-conditioning indoor units are both connected with the air-conditioning outdoor unit;
the processor is used for acquiring the current opening of a throttling element of the floor heating water module and the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit when at least one air-conditioning indoor unit and the floor heating water module are heated simultaneously; obtaining temperature difference characterization parameters according to the plurality of difference values;
the corresponding relation between the temperature difference characterization parameters and the opening adjustment quantity is stored in the memory; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation;
the processor is further used for acquiring the opening degree adjustment amount corresponding to the temperature difference characterization parameter from the memory; acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as an updated opening;
the processor is further used for sending the updated opening degree to the controller of the throttling element when the updated opening degree is smaller than or equal to the maximum opening degree of the throttling element and larger than or equal to the minimum opening degree of the throttling element, and the controller of the throttling element is used for controlling the throttling of the throttling element according to the updated opening degree; the current opening degree is the updated opening degree;
the controller is used for acquiring the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit and sending the updated opening degree to the throttling element, and the controller is used for setting a first period;
the processor is further configured to execute the first cycle after a preset duration.
The embodiment of the invention provides a multi-split air-conditioning floor heating system and a control method thereof, wherein the multi-split air-conditioning floor heating system comprises an air-conditioning outdoor unit, a floor heating water module and a plurality of air-conditioning indoor units, the floor heating water module and the air-conditioning indoor units are connected with the air-conditioning outdoor unit, and the control method comprises the following steps: when at least one air-conditioning indoor unit and a floor heating water module are used for heating simultaneously, firstly, the current opening of a throttling element of the floor heating water module and the difference value between the set temperature and the return air temperature of each currently-heated air-conditioning indoor unit are obtained; then obtaining temperature difference characterization parameters according to the plurality of difference values; acquiring the opening degree adjustment quantity of the throttling element according to the corresponding relation between the temperature difference characterization parameter and the opening degree adjustment quantity; wherein, the temperature difference characterization parameter and the opening adjustment quantity are in inverse proportion; then, acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as the updated opening; when the updated opening degree is smaller than or equal to the maximum opening degree of the throttling element and larger than or equal to the minimum opening degree of the throttling element, controlling the throttling element to throttle with the updated opening degree; the current opening degree is the updated opening degree; the method comprises the steps of obtaining a difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit, controlling a throttling element to throttle by the updated opening degree, and taking the first period as the first period; and then executing the first period after a preset time length. Compared with the prior art, when the air-conditioning indoor unit and the floor heating water module are used for heating simultaneously, the opening degree adjustment quantity of the throttling element of the floor heating water module is obtained according to the difference value between the set temperature of the air-conditioning indoor unit and the return air temperature, and then the opening degree of the throttling element of the floor heating water module is adjusted according to the opening degree adjustment quantity, so that the opening degree of the throttling element of the floor heating water module is smaller at the initial heating stage of the multi-split air-conditioning floor heating system, namely the quantity of refrigerants distributed to the floor heating water module is smaller, and the quantity of refrigerants distributed to the air-conditioning indoor unit is larger, so that the room temperature can be quickly; and the aperture of the throttling element of the floor heating water module is gradually increased in the middle and later periods of heating, namely, the refrigerant quantity distributed to the floor heating water module is gradually increased, the indoor unit of the air conditioner is closed after the temperature of the floor heating water module is raised, and only floor heating is used for supplying heat, so that the comfort requirement is met in the initial period and the middle and later periods of heating. Therefore, the control method improves the heating effect of the multi-split air-conditioning floor heating system and improves the user experience.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a structural block diagram of a floor heating system of a multi-split air conditioner provided in the prior art;
fig. 2 is a flow chart of a control method of a multi-split air-conditioning floor heating system provided by the embodiment of the invention;
fig. 3 is a flowchart of a control method of a multi-split air-conditioning floor heating system according to another embodiment of the invention;
fig. 4 is a structural block diagram of a floor heating system of a multi-split air conditioner provided by the embodiment of the invention;
fig. 5 is a schematic structural diagram of a floor heating system of a multi-split air conditioner provided by the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a control method of a multi-split air-conditioning floor heating system, wherein the multi-split air-conditioning floor heating system comprises an air-conditioning outdoor unit, a floor heating water module and a plurality of air-conditioning indoor units, the floor heating water module and the air-conditioning indoor units are both connected with the air-conditioning outdoor unit, and as shown in fig. 2, the control method comprises the following steps:
In practice, the throttling element is typically an electronic expansion valve.
The current opening degree of the throttling element may be a preset initial value or a value obtained through a certain algorithm, which is not limited in the embodiment of the present invention.
The return air temperature is the temperature at the return air inlet of the indoor unit of the air conditioner.
And step 202, obtaining temperature difference characterization parameters according to the plurality of difference values.
The temperature difference characterization parameter is used for characterizing the difference value between the set temperature and the return air temperature of the indoor unit of the air conditioner; the temperature difference characterization parameter may be a maximum value of a plurality of difference values, or a minimum value of a plurality of difference values, or may also be an average value of a plurality of difference values, which is not limited in the embodiment of the present invention.
In practical application, the corresponding relation between the temperature difference characterization parameter and the opening degree adjustment quantity can be generally made into a corresponding table and stored in a memory in advance; illustratively, the temperature difference characterizing parameter Δ T1hmax is a maximum value of the plurality of difference values, and the corresponding relationship between the temperature difference characterizing parameter Δ T1hmax and the opening degree adjustment Δ EVW is shown in table 1;
TABLE 1
| ΔT1hmax | ΔEVW |
| 4＜ΔT1hmax | -30 |
| 3＜ΔT1hmax≤4 | -15 |
| 2＜ΔT1hmax≤3 | -7 |
| 1＜ΔT1hmax≤2 | 2 |
| ΔT1hmax≤1 | 7 |
As can be seen from table 1, when the temperature difference characterization parameter Δ T1hmax is larger (e.g., 4 < Δ T1hmax or 3 < Δ T1hmax in table 1 is less than or equal to 4), it indicates that the difference between the set temperature of the indoor air conditioner and the return air temperature is larger, and further indicates that the return air temperature of the indoor air conditioner is lower, that is, the temperature of the room where the indoor air conditioner is located is lower, and at this time, the indoor air conditioner is required to undertake a main heating task to quickly heat the room, so that the room is quickly heated, and at this time, the opening degree of the throttling element of the floor heating water module can be reduced with a greater force, that is, the opening degree adjustment Δ EVW is set to a negative value with a larger absolute value (e.g., Δ EVW in table 1 is-30 or-15), so that more refrigerants are distributed to the indoor air conditioner; along with the gradual increase of the temperature of a room, the difference value between the set temperature of an indoor unit of an air conditioner and the return air temperature is gradually reduced, namely the temperature difference characterization parameter delta T1hmax is reduced (for example, delta T1hmax is more than 2 and less than or equal to 3 in table 1), the opening degree reduction force of a throttling element of a floor heating water module is reduced, namely, the opening degree adjustment quantity delta EVW is set to be a negative value with a small absolute value (for example, delta EVW in table 1 is-7); along with the further increase of the temperature of the room, the return air temperature of the air-conditioning indoor unit gradually approaches to the set temperature, that is, the temperature difference characterization parameter Δ T1hmax becomes smaller (for example, when 1 < Δ T1hmax is less than or equal to 2 or Δ T1hmax is less than or equal to 1 in table 1), which indicates that the temperature of the room is close to the set temperature, at this time, the opening degree of the throttling element of the floor heating water module may be increased, that is, the opening degree adjustment amount Δ EVW is set to a positive value (for example, Δ EVW in table 1 is 2 or 7), and the temperature of the floor heating water module is gradually increased by gradually increasing the opening degree of the throttling element of the floor heating water module, so that the floor heating water module can undertake a main heating task in the middle and later.
And 204, acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as the updated opening.
If the updated opening degree is larger than the maximum opening degree of the throttling element, controlling the throttling element to throttle with the maximum opening degree, wherein the current opening degree is the maximum opening degree of the throttling element; and if the updated opening degree is smaller than the minimum opening degree of the throttling element, controlling the throttling element to throttle with the minimum opening degree, wherein the current opening degree is the minimum opening degree of the throttling element.
And step 206, executing the first period after the preset time length.
The preset time period is a preset time period, and a person skilled in the art can set the preset time period according to actual conditions, which is not limited in the embodiment of the present invention. In practical applications, the preset time period may be set to 1 minute, 2 minutes, 5 minutes, or the like.
Therefore, compared with the prior art, when the air-conditioning indoor unit and the floor heating water module are used for heating simultaneously, the opening degree adjustment quantity of the throttling element of the floor heating water module is obtained according to the difference value between the set temperature of the air-conditioning indoor unit and the return air temperature, and then the opening degree of the throttling element of the floor heating water module is adjusted according to the opening degree adjustment quantity, so that the opening degree of the throttling element of the floor heating water module is smaller in the initial heating stage of the multi-split air-conditioning floor heating system, namely the quantity of refrigerants distributed to the floor heating water module is smaller, the quantity of refrigerants distributed to the air-conditioning indoor unit is larger, and the room temperature can be quickly raised by; and the aperture of the throttling element of the floor heating water module is gradually increased in the middle and later periods of heating, namely, the refrigerant quantity distributed to the floor heating water module is gradually increased, the indoor unit of the air conditioner is closed after the temperature of the floor heating water module is raised, and only floor heating is used for supplying heat, so that the comfort requirement is met in the initial period and the middle and later periods of heating. Therefore, the control method improves the heating effect of the multi-split air-conditioning floor heating system and improves the user experience.
It should be noted that when the number of the air conditioning indoor units is zero, that is, only the floor heating water module is started to heat, the throttling element of the floor heating water module is controlled to throttle at the maximum opening.
Further, acquiring the current opening degree of the throttling element of the floor heating water module comprises: acquiring the initial opening of a throttling element, and the ratio of the sum of the capacities of all air conditioner indoor units for current heating to the total capacity of the air conditioner outdoor unit; and acquiring the product of the initial opening and the ratio, and taking the product as the current opening of the throttling element.
The initial opening degree is a preset value, and a person skilled in the art can set the initial opening degree according to actual conditions, which is not limited in the embodiment of the present invention.
Illustratively, the multi-split air-conditioning floor heating system comprises 3 air-conditioning indoor units, the capacity of each air-conditioning indoor unit is 1.5, and the total capacity of the air-conditioning outdoor units is 5; when two air conditioner indoor units and a floor heating water module are used for heating simultaneously, the ratio of the sum of the capacities of all the air conditioner indoor units which are currently heated to the total capacity of the air conditioner outdoor unit is (1.5+1.5) or (5) is 0.6; assuming that the opening degree adjusting range of the throttling element is 60-500 steps; the initial opening of the restriction element is 200 steps, so that the current opening of the restriction element is 200 steps 0.6 to 120 steps.
The current opening degree of the throttling element obtained in the mode can better reflect the initial refrigerant proportion in an air conditioner indoor unit and a floor heating water module for heating in the multi-split air conditioner floor heating system, and a proper initial value is provided for the subsequent opening degree adjustment of the throttling element of the floor heating water module.
Another embodiment of the invention provides a control method for a floor heating system of a multi-split air conditioner, as shown in fig. 3, the control method includes:
301, acquiring the initial opening of a throttling element, and the ratio of the sum of the capacities of all air conditioner indoor units for current heating to the total capacity of an air conditioner outdoor unit; wherein the throttling element is typically an electronic expansion valve.
The initial opening degree is a preset value, and a person skilled in the art can set the initial opening degree according to actual conditions, which is not limited in the embodiment of the present invention.
Illustratively, the multi-split air-conditioning floor heating system comprises 3 air-conditioning indoor units, the capacity of each air-conditioning indoor unit is 1.5, and the total capacity of the air-conditioning outdoor units is 5; when two air conditioner indoor units and a floor heating water module are used for heating simultaneously, the ratio of the sum of the capacities of all the air conditioner indoor units which are currently heated to the total capacity of the air conditioner outdoor unit is (1.5+1.5) or (5) is 0.6; assuming that the opening degree adjusting range of the throttling element is 60-500 steps; the initial opening of the restriction element is 200 steps.
taking the example in step 301 as an example, the initial opening is 200 steps, and the ratio is 0.6, so that the current opening of the throttling element is 200 steps x 0.6-120 steps.
303, acquiring a difference value between the set temperature and the return air temperature of each currently heated air conditioner indoor unit; and the return air temperature is the temperature at the return air inlet of the indoor unit of the air conditioner.
Taking the example in step 301 as an example, in two currently heating indoor air conditioners, assuming that the set temperature of the first indoor air conditioner is 25 ℃ and the return air temperature is 5 ℃, the difference between the set temperature of the first indoor air conditioner and the return air temperature is 20 ℃ between 25 ℃ and 5 ℃; and assuming that the set temperature of the second air-conditioning indoor unit is 25 ℃ and the return air temperature is 7 ℃, the difference between the set temperature of the second air-conditioning indoor unit and the return air temperature is 18 ℃ between 25 ℃ and 7 ℃.
It should be noted that there is no absolute sequence between step 303 and step 301 and step 302 during execution, that is, step 303 may be executed before step 301, between step 301 and step 302, or after step 302, which is not limited in this embodiment of the present invention. For convenience of description, the embodiment of the present invention is described by taking the step 303 as an example after the step 302.
And 304, acquiring the maximum value of the plurality of difference values, and taking the maximum value as a temperature difference characterization parameter.
Taking the example in step 303 as an example, the two differences are 20 ℃ and 18 ℃, respectively, and the maximum value of the two differences is 20 ℃, so that the temperature difference characterization parameter is 20.
305, acquiring the opening degree adjustment quantity of the throttling element according to the corresponding relation between the temperature difference characterization parameter and the opening degree adjustment quantity; wherein, the temperature difference characterization parameter and the opening adjustment quantity are in inverse proportion;
in practical application, the corresponding relation between the temperature difference characterization parameter and the opening degree adjustment quantity can be generally made into a corresponding table and stored in a memory in advance; for example, the corresponding relationship between the temperature difference characterizing parameter Δ T1hmax and the opening degree adjustment Δ EVW is shown in table 1; as can be seen from table 1, when the temperature difference characterization parameter Δ T1hmax is larger (e.g., 4 < Δ T1hmax or 3 < Δ T1hmax in table 1 is less than or equal to 4), it indicates that the difference between the set temperature of the indoor air conditioner and the return air temperature is larger, and further indicates that the return air temperature of the indoor air conditioner is lower, that is, the temperature of the room where the indoor air conditioner is located is lower, and at this time, the indoor air conditioner is required to undertake a main heating task to quickly heat the room, so that the room is quickly heated, and at this time, the opening degree of the throttling element of the floor heating water module can be reduced with a greater force, that is, the opening degree adjustment Δ EVW is set to a negative value with a larger absolute value (e.g., Δ EVW in table 1 is-30 or-15), so that more refrigerants are distributed to the indoor air conditioner; along with the gradual increase of the temperature of a room, the difference value between the set temperature of an indoor unit of an air conditioner and the return air temperature is gradually reduced, namely the temperature difference characterization parameter delta T1hmax is reduced (for example, delta T1hmax is more than 2 and less than or equal to 3 in table 1), the opening degree reduction force of a throttling element of a floor heating water module is reduced, namely, the opening degree adjustment quantity delta EVW is set to be a negative value with a small absolute value (for example, delta EVW in table 1 is-7); along with the further increase of the temperature of the room, the return air temperature of the air-conditioning indoor unit gradually approaches to the set temperature, that is, the temperature difference characterization parameter Δ T1hmax becomes smaller (for example, when 1 < Δ T1hmax is less than or equal to 2 or Δ T1hmax is less than or equal to 1 in table 1), which indicates that the temperature of the room is close to the set temperature, at this time, the opening degree of the throttling element of the floor heating water module may be increased, that is, the opening degree adjustment amount Δ EVW is set to a positive value (for example, Δ EVW in table 1 is 2 or 7), and the temperature of the floor heating water module is gradually increased by gradually increasing the opening degree of the throttling element of the floor heating water module, so that the floor heating water module can undertake a main heating task in the middle and later.
Taking the example in step 304 as an example, and referring to table 1, when the temperature difference characterizing parameter Δ T1hmax is 20, the opening degree adjustment Δ EVW is-30.
taking the example in step 305 as an example, if the current opening is 120 steps, the opening adjustment Δ EVW is-30, and the updated opening is 90 steps, i.e., 120 steps-30.
taking the example in step 306 as an example, the updated opening degree is 90 steps; the opening degree adjustment range of the throttling element is 60 steps to 500 steps, that is, the maximum opening degree of the throttling element is 500 steps, and the minimum opening degree is 60 steps, so that the opening degree after updating is judged to be smaller than or equal to the maximum opening degree of the throttling element and larger than or equal to the minimum opening degree of the throttling element.
308, controlling the throttling element to throttle with the updated opening degree, wherein the current opening degree is the updated opening degree; go to step 312;
taking the example in step 306 as an example, the throttling element is controlled to throttle at an opening of 90 steps, where the current opening of the throttling element is 90 steps.
if the updated opening degree is smaller than the minimum opening degree of the throttling element, controlling the throttling element to throttle with the minimum opening degree; taking the example in step 307 as an example, if the updated opening degree is smaller than 60 steps, the throttle element is controlled to throttle at an opening degree of 60 steps, and at this time, the current opening degree of the throttle element is 60 steps.
311, controlling the throttling element to throttle at the maximum opening, wherein the current opening is the maximum opening of the throttling element; step 313 is executed;
if the updated opening degree is larger than the maximum opening degree of the throttling element, controlling the throttling element to throttle at the maximum opening degree; taking the example in step 307 as an example, if the updated opening degree is greater than 500 steps, the throttle element is controlled to throttle at an opening degree of 500 steps, and at this time, the current opening degree of the throttle element is 500 steps.
The preset time period is a preset time period, and a person skilled in the art can set the preset time period according to actual conditions, which is not limited in the embodiment of the present invention. In practical applications, the preset time period may be set to 1 minute, 2 minutes, 5 minutes, or the like.
And step 313, finishing.
When the updated opening degree of the throttling element is larger than the maximum opening degree, the throttling element is controlled to throttle at the maximum opening degree, and at the moment, the temperature of the room reaches the set temperature or is very close to the set temperature, so that the indoor unit of the air conditioner can be turned off, and the room temperature is maintained only by utilizing the floor heating water module for heating.
Another embodiment of the present invention provides a multi-split air-conditioning floor heating system, as shown in fig. 4 and 5, including an air-conditioning outdoor unit 51, a floor heating water module 52, and a plurality of air-conditioning indoor units 53, where the floor heating water module 52 and the air-conditioning indoor units 53 are both connected to the air-conditioning outdoor unit 51, and further including:
the first obtaining unit 41 is configured to obtain, when at least one of the air-conditioning indoor units and the floor heating water module are simultaneously heating, a current opening degree of a throttling element of the floor heating water module, and a difference value between a set temperature of each currently-heated air-conditioning indoor unit and a return air temperature;
the second obtaining unit 42 is configured to obtain a temperature difference characterization parameter according to a plurality of the difference values;
a third obtaining unit 43, configured to obtain an opening adjustment amount of the throttling element according to a corresponding relationship between the temperature difference characterization parameter and the opening adjustment amount; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation;
a fourth obtaining unit 44, configured to obtain a sum of the current opening degree and the opening degree adjustment amount, and use the sum as an updated opening degree;
a control unit 45 configured to control the throttling element to throttle at the updated opening degree when the updated opening degree is less than or equal to a maximum opening degree of the throttling element and greater than or equal to a minimum opening degree of the throttling element; the current opening degree is the updated opening degree; the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit is obtained, and the throttling element is controlled to throttle by the updated opening degree to be a first period;
the control unit 45 is further configured to execute the first cycle after a preset time period.
Therefore, compared with the prior art, when the air-conditioning indoor unit and the floor heating water module are used for heating simultaneously, the opening degree adjustment quantity of the throttling element of the floor heating water module is obtained according to the difference value between the set temperature of the air-conditioning indoor unit and the return air temperature, and then the opening degree of the throttling element of the floor heating water module is adjusted according to the opening degree adjustment quantity, so that the opening degree of the throttling element of the floor heating water module is smaller at the initial stage of heating of the multi-split air-conditioning floor heating system, namely, the quantity of refrigerants distributed to the floor heating water module is smaller, and the quantity of refrigerants distributed to the air-conditioning indoor unit is larger, and therefore, the room temperature can be quickly raised by mainly utilizing the; and the aperture of the throttling element of the floor heating water module is gradually increased in the middle and later periods of heating, namely, the refrigerant quantity distributed to the floor heating water module is gradually increased, the indoor unit of the air conditioner is closed after the temperature of the floor heating water module is raised, and only floor heating is used for supplying heat, so that the comfort requirement is met in the initial period and the middle and later periods of heating. Therefore, the control method improves the heating effect of the multi-split air-conditioning floor heating system and improves the user experience.
Further, the first obtaining unit 41 is specifically configured to:
acquiring the initial opening of the throttling element, and the ratio of the sum of the capacities of all air conditioner indoor units for current heating to the total capacity of the air conditioner outdoor unit;
and acquiring the product of the initial opening degree and the ratio, and taking the product as the current opening degree of the throttling element.
Further, the second obtaining unit 42 is specifically configured to:
and acquiring the maximum value of the plurality of difference values, and taking the maximum value as a temperature difference characterization parameter.
Further, referring to fig. 5, the multi-split air-conditioning floor heating system further includes a liquid storage 501, and the liquid storage 501 is used for storing redundant refrigerants in the multi-split air-conditioning floor heating system under the condition that the air-conditioning indoor unit 53 or the floor heating water module 52 works independently.
When the multi-split air-conditioning floor heating system adopts the air-conditioning indoor unit 53 and the floor heating water module 52 to simultaneously heat, the required refrigerant quantity is large due to the large condensation area of the system; when the indoor unit 53 of the air conditioner is used alone for heating and refrigerating or the floor heating water module 52 is used alone for heating, the required amount of refrigerant is small due to the small heat exchange area, and in view of the difference of the refrigerant of the system under different operation conditions, the liquid storage device 501 is additionally arranged in the floor heating system of the multi-split air conditioner and is used for storing redundant refrigerant.
As shown in fig. 5, the system operation route is briefly described as follows: when the air conditioner indoor unit 53 and the floor heating water module 52 are simultaneously operated for heating, the refrigerant is compressed by the compressor 502, then passes through the oil separator 503, the four-way valve 504 and the air side stop valve 505, respectively, and then passes through the indoor air conditioner electronic expansion valve 508 and the floor heating water module electronic expansion valve 509 (i.e., a throttling element of the floor heating water module), the liquid side stop valve 510, the liquid reservoir 501, the air conditioner outdoor unit electronic expansion valve 511 and the air conditioner outdoor unit heat exchanger 512, and then passes through the four-way valve 504 and the gas-liquid separator 513, and then returns to the compressor 502. At this moment, the condensation area of the whole system is the sum of the heat exchange areas of the indoor air conditioner 53 carried by the system and the floor heating water module 52, and according to the heat balance relationship, the heat release quantity of the refrigerant side is equal to the heat gain quantity of the air side, specifically:
Q＝K*F*△Tm＝Cp*M*△Tr，
wherein K is the heat transfer coefficient kw/(m)2Deg.c); f is the heat transfer area m outside the tube2(ii) a Δ Tm is the log mean temperature difference; cp is the constant pressure specific heat capacity KJ/(kg. ℃) of the refrigerant; m is refrigerant flow kg/s; delta Tr is the temperature difference between an inlet and an outlet of a refrigerant;
under the condition that the delta Tm and the delta Tr are not changed, the larger F is, the larger M is, namely, the larger the refrigerant flow is; similarly, if the system only has the floor heating water module 52 for heating or only has the air conditioning indoor unit for heating or cooling, F is decreased, the amount of refrigerant required by the system is decreased, and redundant refrigerant is stored in the air conditioning indoor unit 53 or the air conditioning outdoor unit 51 which is not in operation. However, for the multi-split system with the floor heating water module 52, one of the functions carried by the floor heating water module 52 is to independently take charge of heating or cooling of the system, and based on the requirement, the amount of refrigerant added by the system must meet the requirement of the floor heating water module 52 when the floor heating water module operates alone, and also meet the requirement of the air-conditioning indoor unit 53 and the floor heating water module 52 when the air-conditioning indoor unit operates simultaneously, so that the amount of refrigerant filled in the multi-split system with the floor heating system is more than that of the common multi-split system or the common floor heating machine. Therefore, the high-pressure liquid storage device is additionally arranged to improve the reliability of the system.
In addition, when the indoor air conditioner 53 and the floor heating water module 52 heat simultaneously, because the multi-split air conditioner system is provided with the floor heating water module 52, the heating effect of the floor heating water module 52 is mainly considered in winter heating, the exhaust pressure of the water system is higher than that of an air system, the heat exchanger 512 of the outdoor air conditioner can frost slowly and quickly, and a supercooling section at the bottom of the outdoor air conditioner can be removed under the condition that the bottom of the outdoor air conditioner is not frozen, so that the heating capacity is improved.
In practical applications, the liquid reservoir 501 may be disposed between the electronic expansion valve 508 of the indoor unit and the electronic expansion valve 511 of the outdoor unit; or may be disposed between the indoor heat exchanger 506 and the electronic expansion valve 508 of the indoor unit of the air conditioner, which is not limited in the embodiment of the present invention. Preferably, the liquid accumulator 501 is disposed in the outdoor unit 51 and connected between the electronic expansion valve 508 of the indoor unit and the electronic expansion valve 511 of the outdoor unit, so that redundant refrigerant can be stored in the system during cooling or heating.
The invention further provides a multi-split air-conditioning floor heating system which comprises an air-conditioning outdoor unit, a floor heating water module, a plurality of air-conditioning indoor units, a processor, a memory and a controller of a throttling element of the floor heating water module, wherein the floor heating water module and the air-conditioning indoor units are both connected with the air-conditioning outdoor unit; the processor is used for acquiring the current opening of a throttling element of the floor heating water module and the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit when at least one air-conditioning indoor unit and the floor heating water module are heated simultaneously; obtaining temperature difference characterization parameters according to the plurality of difference values; the corresponding relation between the temperature difference characterization parameters and the opening adjustment quantity is stored in the memory; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation; the processor is further used for acquiring the opening degree adjustment amount corresponding to the temperature difference characterization parameter from the memory; acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as an updated opening; the processor is further used for sending the updated opening degree to the controller of the throttling element when the updated opening degree is smaller than or equal to the maximum opening degree of the throttling element and larger than or equal to the minimum opening degree of the throttling element, and the controller of the throttling element is used for controlling the throttling of the throttling element according to the updated opening degree; the current opening degree is the updated opening degree; the controller is used for acquiring the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit and sending the updated opening degree to the throttling element, and the controller is used for setting a first period; the processor is further configured to execute the first cycle after a preset duration.
When the air-conditioning indoor unit and the floor heating water module are used for heating simultaneously, the opening degree adjustment quantity of the throttling element of the floor heating water module can be obtained according to the difference value between the set temperature of the air-conditioning indoor unit and the return air temperature, and then the opening degree of the throttling element of the floor heating water module is adjusted according to the opening degree adjustment quantity, so that the opening degree of the throttling element of the floor heating water module is smaller at the initial stage of heating of the multi-split air-conditioning floor heating system, namely, the quantity of refrigerants distributed to the floor heating water module is smaller, and the quantity of refrigerants distributed to the air-conditioning indoor unit is larger, so that the room temperature can be quickly raised by mainly utilizing the air-; and the aperture of the throttling element of the floor heating water module is gradually increased in the middle and later periods of heating, namely, the refrigerant quantity distributed to the floor heating water module is gradually increased, the indoor unit of the air conditioner is closed after the temperature of the floor heating water module is raised, and only floor heating is used for supplying heat, so that the comfort requirement is met in the initial period and the middle and later periods of heating. Therefore, the control method improves the heating effect of the multi-split air-conditioning floor heating system and improves the user experience.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The control method of the multi-split air-conditioning floor heating system is characterized in that the control method comprises the following steps of:
when at least one air-conditioning indoor unit and the floor heating water module are heated simultaneously, acquiring the current opening of a throttling element of the floor heating water module and the difference value between the set temperature of each air-conditioning indoor unit which is heated currently and the return air temperature;
obtaining a temperature difference characterization parameter according to the plurality of difference values;
acquiring the opening degree adjustment quantity of the throttling element according to the corresponding relation between the temperature difference characterization parameter and the opening degree adjustment quantity; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation;
acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as an updated opening;
when the updated opening degree is smaller than or equal to the maximum opening degree of the throttling element and larger than or equal to the minimum opening degree of the throttling element, controlling the throttling element to throttle at the updated opening degree; the current opening degree is the updated opening degree; the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit is obtained, and the throttling element is controlled to throttle by the updated opening degree to be a first period;
and executing the first period after the preset time length.
2. The control method according to claim 1, wherein the obtaining of the current opening degree of the throttling element of the floor heating water module comprises:
acquiring the initial opening of the throttling element, and the ratio of the sum of the capacities of all air conditioner indoor units for current heating to the total capacity of the air conditioner outdoor unit;
and acquiring the product of the initial opening degree and the ratio, and taking the product as the current opening degree of the throttling element.
3. The control method according to claim 1, wherein the obtaining of the temperature difference characterization parameter according to the plurality of difference values specifically comprises:
and acquiring the maximum value of the plurality of difference values, and taking the maximum value as a temperature difference characterization parameter.
4. The control method according to claim 1, characterized by further comprising:
when the updated opening degree is larger than the maximum opening degree of the throttling element, controlling the throttling element to throttle by the maximum opening degree, wherein the current opening degree is the maximum opening degree; and when the updated opening degree is smaller than the minimum opening degree of the throttling element, controlling the throttling element to throttle with the minimum opening degree, wherein the current opening degree is the minimum opening degree.
5. The utility model provides a many online air conditioner underfloor heating system, includes air condensing units, warms up water module and a plurality of air conditioning indoor set, warms up the water module with the air conditioning indoor set all with air condensing units connects, its characterized in that still includes:
the first acquisition unit is used for acquiring the current opening of a throttling element of the floor heating water module and the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit when at least one air-conditioning indoor unit and the floor heating water module are heated simultaneously;
the second obtaining unit is used for obtaining temperature difference characterization parameters according to the difference values;
the third obtaining unit is used for obtaining the opening degree adjustment quantity of the throttling element according to the corresponding relation between the temperature difference representation parameter and the opening degree adjustment quantity; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation;
a fourth obtaining unit, configured to obtain a sum of the current opening degree and the opening degree adjustment amount, and use the sum as an updated opening degree;
a control unit configured to control the throttling element to throttle at the updated opening degree when the updated opening degree is less than or equal to a maximum opening degree of the throttling element and greater than or equal to a minimum opening degree of the throttling element; the current opening degree is the updated opening degree; the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit is obtained, and the throttling element is controlled to throttle by the updated opening degree to be a first period;
the control unit is further configured to execute the first period after a preset duration.
6. The multi-split air-conditioning floor heating system of claim 5, wherein the first obtaining unit is specifically configured to:
acquiring the initial opening of the throttling element, and the ratio of the sum of the capacities of all air conditioner indoor units for current heating to the total capacity of the air conditioner outdoor unit;
and acquiring the product of the initial opening degree and the ratio, and taking the product as the current opening degree of the throttling element.
7. The multi-split air-conditioning floor heating system according to claim 5, wherein the second obtaining unit is specifically configured to:
and acquiring the maximum value of the plurality of difference values, and taking the maximum value as a temperature difference characterization parameter.
8. The multi-split air-conditioning floor heating system as recited in claim 5, further comprising a liquid storage device, wherein the liquid storage device is used for storing redundant refrigerants in the multi-split air-conditioning floor heating system under the condition that the air-conditioning indoor unit or the floor heating water utilization module works independently.
9. The multi-split air-conditioning floor heating system as claimed in claim 8, wherein the liquid accumulator is located in the outdoor unit and connected between the electronic expansion valve of the indoor unit and the electronic expansion valve of the outdoor unit.
10. A multi-split air-conditioning floor heating system comprises an air-conditioning outdoor unit, a floor heating water module and a plurality of air-conditioning indoor units, wherein the floor heating water module and the air-conditioning indoor units are both connected with the air-conditioning outdoor unit;
the processor is used for acquiring the current opening of a throttling element of the floor heating water module and the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit when at least one air-conditioning indoor unit and the floor heating water module are heated simultaneously; obtaining temperature difference characterization parameters according to the plurality of difference values;
the corresponding relation between the temperature difference characterization parameters and the opening adjustment quantity is stored in the memory; wherein the temperature difference characterization parameter and the opening degree adjustment quantity are in an inverse relation;
the processor is further used for acquiring the opening degree adjustment amount corresponding to the temperature difference characterization parameter from the memory; acquiring a sum of the current opening and the opening adjustment amount, and taking the sum as an updated opening;
the processor is further used for sending the updated opening degree to the controller of the throttling element when the updated opening degree is smaller than or equal to the maximum opening degree of the throttling element and larger than or equal to the minimum opening degree of the throttling element, and the controller of the throttling element is used for controlling the throttling of the throttling element according to the updated opening degree; the current opening degree is the updated opening degree;
the controller is used for acquiring the difference value between the set temperature and the return air temperature of each currently heated air-conditioning indoor unit and sending the updated opening degree to the throttling element, and the controller is used for setting a first period;
the processor is further configured to execute the first cycle after a preset duration.
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