CN108800488B - Water system air conditioner control method - Google Patents
Water system air conditioner control method Download PDFInfo
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- CN108800488B CN108800488B CN201810557213.2A CN201810557213A CN108800488B CN 108800488 B CN108800488 B CN 108800488B CN 201810557213 A CN201810557213 A CN 201810557213A CN 108800488 B CN108800488 B CN 108800488B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 239
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000012937 correction Methods 0.000 claims abstract description 103
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 description 8
- 239000011737 fluorine Substances 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The method for controlling the air conditioner of the water system comprises the steps of obtaining the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity of each indoor unit every set time period, and the ratio of starting time in the set time period; then determining the inlet water temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity; comparing the inlet water temperature correction values of all the indoor units, and selecting the minimum value as the outlet water temperature correction value of the outdoor unit; correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature; therefore, the temperature and humidity requirements of a room where each indoor unit is located are met, the temperature comfort and humidity comfort of a user are improved, and the comfort and use experience of the user are improved; moreover, the control method is simple, convenient to implement and low in cost.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a water system air conditioner control method.
Background
Along with the improvement of living standard of people, the requirement of people on comfort in use of an air conditioner is higher and higher, and the comfort of reaching the temperature and the humidity is also required.
For a water system air conditioner, as outdoor weather is constantly changed and indoor personnel and load are also constantly changed, the indoor load is constantly changed on the whole, so that the water temperature entering the terminal equipment is not required by the terminal equipment, and the fixed water temperature obviously cannot meet the requirement. At present, a water system air conditioner for variable water temperature control in the market only corrects the water temperature according to the difference between the indoor current temperature and the set temperature so as to realize variable water temperature operation. If the water temperature provided after correction is low, although the set temperature can be reached as soon as possible, the humidity in the room is easy to reduce, so that the user feels that the air is dry; if the temperature of the water provided after correction is higher, the indoor humidity is easy to be too high, discomfort is brought to people, the humidity comfort requirement of a user cannot be met, and the user experience is poor.
Disclosure of Invention
The invention provides a water system air conditioner control method, which improves the use experience of users.
In order to solve the technical problems, the invention adopts the following technical scheme:
a control method for an air conditioner of a water system comprises an outdoor unit and at least one indoor unit, wherein a water outlet pipe of the outdoor unit is respectively connected with a water inlet pipe of each indoor unit, and a water inlet pipe of the outdoor unit is respectively connected with a water outlet pipe of each indoor unit; the control method comprises the following steps:
when the water system air conditioner starts to perform refrigerating operation or the target outlet water temperature of the outdoor unit is reset in the refrigerating operation process, the outlet water temperature correction value of the outdoor unit is =0, and the inlet water temperature correction value of each indoor unit is = 0; then, the following steps are executed every set period of time:
(1) acquiring the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity of each indoor unit, and the ratio of the starting time in the set time period;
(2) determining a corrected value of the inlet water temperature of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity;
(3) comparing the inlet water temperature correction values of all the indoor units, and selecting the minimum value as the outlet water temperature correction value of the outdoor unit;
(4) and correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature.
Further, the step (2) specifically comprises:
(21) for the indoor unit with the startup time in the E [0, a):
when the actual environment humidity is larger than the set environment humidity, the inlet water temperature correction value of the indoor unit is reduced by the set value; when the actual environment humidity is not more than the set environment humidity, the inlet water temperature correction value of the indoor unit is increased by a set value; wherein 0< a < 1;
(22) for the indoor unit with the turn-on time in the E [ a, 1):
when the actual environment humidity is larger than the set environment humidity, the inlet water temperature correction value of the indoor unit is reduced by the set value; when the actual environment humidity is not greater than the set environment humidity, the inlet water temperature correction value of the indoor unit is kept unchanged;
(23) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature being less than or equal to b:
when the actual environment humidity is larger than the set environment humidity, the inlet water temperature correction value of the indoor unit is reduced by the set value; when the actual environment humidity is not greater than the set environment humidity, the inlet water temperature correction value of the indoor unit is kept unchanged; wherein b is greater than 0;
(24) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature > b, the inlet water temperature correction value of the indoor unit is reduced by the set value.
Further, the actual environment humidity is actual absolute humidity, and a preset temperature-relative humidity-absolute humidity correspondence table is inquired according to the acquired actual relative humidity and the actual environment temperature to obtain the actual environment humidity; and the set environment humidity is set absolute humidity, and the preset temperature-relative humidity-absolute humidity corresponding table is inquired according to preset set relative humidity and set environment temperature to obtain the set environment humidity.
Furthermore, the value range of the set time period is 3-30 minutes.
Further, the value range of a is 0.1-0.9.
Preferably, a is 0.7.
Further, the value range of b is 0-2 ℃.
Further, the value range of the set value is 0.1-5 ℃.
Preferably, the set value is 0.5 ℃.
A control method for an air conditioner of a water system comprises an outdoor unit and at least one indoor unit, wherein a water outlet pipe of the outdoor unit is respectively connected with a water inlet pipe of each indoor unit, and a water inlet pipe of the outdoor unit is respectively connected with a water outlet pipe of each indoor unit; the control method comprises the following steps:
when a water system air conditioner starts to perform heating operation or the target outlet water temperature of an outdoor unit is reset in the heating operation process, the outlet water temperature correction value of the outdoor unit is =0, and the inlet water temperature correction value of each indoor unit is = 0; then, the following steps are executed every set period of time:
(1) acquiring the actual environment temperature of each indoor unit, the set environment temperature and the ratio of the starting time in the set time period;
(2) determining the inlet water temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature and the set environment temperature:
(21) for the indoor unit with the starting time being within the range of 0, a), reducing the inlet water temperature correction value of the indoor unit by a set value; wherein 0< a < 1;
(22) for the indoor unit with the starting time in the E [ a,1 ], maintaining the inlet water temperature correction value of the indoor unit unchanged;
(23) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature > b, the inlet water temperature correction value of the indoor unit is kept unchanged; wherein b is greater than 0;
(24) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature is less than or equal to b, increasing the inlet water temperature correction value of the indoor unit by a set value;
(3) comparing the inlet water temperature correction values of all the indoor units, and selecting the maximum value as the outlet water temperature correction value of the outdoor unit;
(4) and correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature.
Compared with the prior art, the invention has the advantages and positive effects that: the method for controlling the air conditioner of the water system comprises the steps of obtaining the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity of each indoor unit every set time period, and the ratio of starting time in the set time period; then determining the inlet water temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity; comparing the inlet water temperature correction values of all the indoor units, and selecting the minimum value as the outlet water temperature correction value of the outdoor unit; correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature; therefore, the temperature and humidity requirements of a room where each indoor unit is located are met, the temperature comfort and humidity comfort of a user are improved, and the comfort and use experience of the user are improved; moreover, the control method is simple, convenient to implement and low in cost.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a block diagram of a water system air conditioner;
FIG. 2 is a flow chart of an embodiment of a water system air conditioner control method of the present invention;
fig. 3 is a flowchart of another embodiment of the method for controlling the air conditioner in the water system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
The water system air conditioner comprises an outdoor unit and at least one indoor unit, wherein a water outlet pipe of the outdoor unit is respectively connected with a water inlet pipe of each indoor unit, a water inlet pipe of the outdoor unit is respectively connected with a water outlet pipe of each indoor unit, and the water inlet pipe is shown in figure 1; the water flowing out of the water outlet pipe of the outdoor unit enters the water inlet pipe of each indoor unit respectively, and after heat exchange is carried out in the indoor units, the water flows out of the water outlet pipe of the indoor unit and enters the water inlet pipe of the outdoor unit, so that a cycle is completed.
A fan coil and a controller are arranged in the indoor unit, and a floor heater can be arranged for heating. Supposing that the water system air conditioner comprises n indoor units, as shown in fig. 1, each indoor unit 1 comprises a controller 1, a fan coil and a floor heater, each indoor unit 2 comprises a controller 2, a fan coil, a floor heater and … …, and each indoor unit n comprises a controller n, a fan coil and a floor heater.
During refrigerating operation, the water circulation path is as follows:
the water fluorine heat exchanger of the outdoor unit → the water outlet pipe of the outdoor unit → the water inlet pipe of the indoor unit → the fan coil → the water outlet pipe of the indoor unit → the water inlet pipe of the outdoor unit → the water fluorine heat exchanger.
During heating operation, the water circulation path is as follows:
the water fluorine heat exchanger of the outdoor unit → the water outlet pipe of the outdoor unit → the water inlet pipe of the indoor unit → the floor heating (or fan coil pipe) → the water outlet pipe of the indoor unit → the water inlet pipe of the outdoor unit → the water fluorine heat exchanger.
The first embodiment,
Under the refrigeration working condition, the method for controlling the air conditioner of the water system mainly comprises the following steps, which are shown in fig. 2.
When the water system air conditioner starts to perform cooling operation or the target outlet water temperature of the outdoor unit is reset in the cooling operation process, the outlet water temperature correction value fix =0 of the outdoor unit, and the inlet water temperature correction value =0 of each indoor unit, namely the inlet water temperature correction value fix1=0 of the indoor unit 1, the inlet water temperature correction value fix2=0 and … … of the indoor unit 2, and the inlet water temperature correction value fix =0 of the indoor unit n.
Then, every set time period T (e.g., 10 minutes), the following steps are performed:
step S11: the method comprises the steps of obtaining the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity of each indoor unit, and comparing the starting time in the set time period.
The actual environment temperature of the indoor unit of the ith station is Tcuri, the set environment temperature is Tset, the actual environment humidity is Hcuri, the set environment humidity is Hseti, and the ratio of the starting time to the starting time in the set time period is Pi; i =1,2,3, … …, n.
Boot time ratio = boot time/set time period within a set time period. If the set time period is 10 minutes and the turn-on time of the ith indoor unit in the set time period is 5 minutes, the turn-on time ratio Pi =5/10=0.5 of the indoor unit.
A temperature sensor and a humidity sensor are arranged in each indoor unit or a room where the indoor unit is located, the temperature sensor sends collected temperature signals to a controller of the indoor unit, and the humidity sensor sends collected humidity signals to the controller of the indoor unit.
And the controller of each indoor unit is in communication connection with the main controller of the outdoor unit to carry out communication. And the controller of the indoor unit sends the temperature signal, the humidity signal and other operation parameters of the indoor unit to the main controller of the outdoor unit.
A user sets indoor set environmental temperature and set environmental humidity through a remote controller and sends the indoor set environmental temperature and the set environmental humidity to a controller of the indoor unit, and the controller of the indoor unit sends the indoor set environmental temperature and the set environmental humidity to a main controller of the outdoor unit.
In this embodiment, in order to improve the accuracy of determining the indoor humidity, the actual ambient humidity is the actual absolute humidity, and the preset temperature-relative humidity-absolute humidity correspondence table is queried according to the acquired actual relative humidity and actual ambient temperature. The actual relative humidity is acquired through a humidity sensor, the actual environment temperature is acquired through a temperature sensor, and then a preset temperature-relative humidity-absolute humidity corresponding table is inquired to obtain the actual absolute humidity as the actual environment humidity. The set environment humidity is set absolute humidity, and a preset temperature-relative humidity-absolute humidity corresponding table is inquired according to preset set relative humidity and set environment temperature to obtain the set environment humidity.
For example, the actual ambient temperature of the indoor unit 1 is 28 ℃, the actual relative humidity is 56%, and the actual absolute humidity is 13.3 by looking up the corresponding table. The set ambient temperature of the indoor unit 1 is 26 ℃, the set relative humidity is 50%, and the actual absolute humidity is 10.5 by querying the corresponding table.
Step S12: and determining the inlet water temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity.
The method specifically comprises the following steps:
(1) and for the indoor unit with the starting time being within the range of 0, a), the load requirement is low.
And when the actual environment humidity is greater than the set environment humidity, reducing the inlet water temperature correction value of the indoor unit by the set value. The indoor unit needs to be cooled and dehumidified further to meet the comfort requirements of users on temperature and humidity because the load requirement of the indoor unit is small and the indoor humidity does not meet the requirements.
And when the actual environment humidity is not greater than the set environment humidity, increasing the inlet water temperature correction value of the indoor unit by the set value. This is because the load demand of the indoor unit is small, and the indoor humidity has already reached the requirement, and the inlet water temperature of the indoor unit can be appropriately raised for energy saving.
Wherein 0< a < 1.
(2) And for the indoor unit with the starting time being within the range of ∈ [ a,1), the load requirement is large.
And when the actual environment humidity is greater than the set environment humidity, reducing the inlet water temperature correction value of the indoor unit by the set value. The indoor unit needs to be cooled and dehumidified further to meet the comfort requirements of users on temperature and humidity because the load requirement of the indoor unit is large and the indoor humidity does not meet the requirements.
And when the actual environment humidity is not greater than the set environment humidity, the inlet water temperature correction value of the indoor unit is kept unchanged. This is because the load demand of the indoor unit is large, the indoor humidity has reached the demand, and if the temperature is raised for energy saving, the load demand of the indoor unit is not satisfied, and therefore, the inflow water temperature of the indoor unit needs to be maintained.
(3) And for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature is less than or equal to b, the indoor unit is always started, and the indoor temperature meets the requirement.
And when the actual environment humidity is greater than the set environment humidity, reducing the inlet water temperature correction value of the indoor unit by the set value. The indoor unit has high load demand, the indoor temperature meets the requirement, but the indoor humidity does not meet the requirement, and the indoor unit needs to be further cooled and dehumidified to meet the comfort requirement of a user on the temperature and the humidity.
And when the actual environment humidity is not greater than the set environment humidity, the inlet water temperature correction value of the indoor unit is kept unchanged. This is because the load demand of the indoor unit is large, the indoor temperature has already reached the requirement, the indoor humidity has also reached the requirement, and the temperature of the inlet water to the indoor unit needs to be maintained.
Wherein b is greater than 0.
(4) And for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature is larger than b, the indoor unit is always started, the indoor temperature does not meet the requirement, the load demand is larger, and the inlet water temperature correction value of the indoor unit is reduced by the set value. The indoor unit has high load demand, the indoor temperature does not meet the requirement, and further cooling is needed to meet the comfort requirement of the user on the temperature and the humidity.
Step S13: and comparing the inlet water temperature correction values of all the indoor units, and selecting the minimum value as the outlet water temperature correction value of the outdoor unit.
That is, the minimum value of the fix1, the fix2, … … and the fix n is selected, and the outdoor unit outlet water temperature correction value fix is equal to the minimum value.
Step S14: and correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value fix of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature.
And correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value fix of the outdoor unit, specifically, the current target outlet water temperature + fix of the outdoor unit. The corrected target outlet water temperature can be realized by adjusting the opening degree of an expansion valve between the outdoor heat exchanger and the water fluorine heat exchanger or the frequency of a compressor. The target outlet water temperature of the outdoor unit is also the target outlet water temperature of the water-fluorine heat exchanger.
The minimum value of the inlet water temperature correction values of all the indoor units is selected as the outlet water temperature correction value of the outdoor unit, the target outlet water temperature of the outdoor unit is corrected, the load requirements of all the indoor units are comprehensively considered, the temperature and humidity requirements of a room where each indoor unit is located are met, the temperature comfort and humidity comfort of a user are improved, and the use experience of the user is improved.
In the water system air conditioner control method of the embodiment, under the refrigeration working condition, the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity of each indoor unit are obtained every set time period, and the ratio of the starting time in the set time period is obtained; then determining the inlet water temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity; comparing the inlet water temperature correction values of all the indoor units, and selecting the minimum value as the outlet water temperature correction value of the outdoor unit; correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature; therefore, the temperature and humidity requirements of a room where each indoor unit is located are met, the temperature comfort and humidity comfort of a user are improved, and the comfort and use experience of the user are improved; moreover, the control method is simple, convenient to implement and low in cost.
In this embodiment, the steps S11 to S14 are performed once every set time period T, that is, the outlet water temperature correction value of the outdoor unit is adjusted every set time period T, so as to correct the target outlet water temperature of the outdoor unit in time, so as to meet the temperature and humidity requirements of the room where each indoor unit is located in time, and improve the user experience.
According to the control method, the target outlet water temperature of the outdoor unit is corrected, so that the temperature of water automatically changes along with the change of indoor temperature and humidity load, the indoor temperature and humidity meet the requirements of users, the indoor temperature and humidity reach constant temperature and humidity, the comfort of the users is improved, and energy is saved.
In the embodiment, the value range of the set time period T is 3-30 minutes; both avoided the too short regulation that leads to of time too frequent, avoided the too slow, the system start-stop that leads to of time overlength again frequent, consequently, in this value range, both guaranteed to adjust in time, avoided frequent opening again and stop, improved user's travelling comfort and use experience. As an optimal design scheme of this embodiment, the set time period T is 10 minutes, which not only ensures timely adjustment, but also avoids frequent start and stop, and improves user comfort.
In this embodiment, a ranges from 0.1 to 0.9. a, if the temperature is too small, the outlet water temperature of the outdoor unit can be corrected when the indoor unit is shut down, and the fluctuation of the room temperature is easy to be large when the indoor unit is started; if a is too large, the indoor unit operates for a long time and does not reach the set temperature, and the temperature is not corrected in time, so that the set temperature is slowly reached, and the use experience of a user is influenced. Therefore, within the value range, the outlet water temperature of the outdoor unit can be corrected in time, the fluctuation of the room temperature is avoided, and the comfort and the use experience of users are improved. As a preferred design scheme of this embodiment, a is 0.7, which not only can correct the outdoor unit outlet water temperature in time, but also can avoid causing room temperature fluctuation, thereby improving the comfort of users.
In this embodiment, the value range of b is 0-2 ℃. If the value of b is too large, the indoor temperature does not meet the temperature requirement of the user; if the value of b is too small, excessive adjustment is easily caused, and energy waste is caused. Therefore, within the value range, the temperature requirement of the user can be met, the comfort of the user is improved, and the energy is saved. As a preferred design of this embodiment, b =0.5 ℃, which can both meet the temperature requirement of the user and save energy.
In this embodiment, the value of the set value ranges from 0.1 ℃ to 5 ℃. If the value is too large, the temperature correction is easy to be too large, so that the unit fluctuates frequently, and the room temperature fluctuates too much; if the value is too small, the correction is too small, and the temperature adjustment speed is too slow. Therefore, within the value range, the reasonable temperature regulation speed is ensured, and the overlarge fluctuation of the room temperature is avoided. As a preferred design of this embodiment, the set value =0.5 ℃, which not only ensures a reasonable temperature adjustment speed, but also avoids excessive room temperature fluctuation.
Example II,
In the heating condition, the method for controlling the air conditioner of the water system of the embodiment mainly comprises the following steps, which are shown in fig. 3.
When the water system air conditioner starts heating operation, or the target outlet water temperature of the outdoor unit is reset in the heating operation process, the outlet water temperature correction value fix =0 of the outdoor unit, and the inlet water temperature correction value =0 of each indoor unit, that is, the inlet water temperature correction value fix1=0 of the indoor unit 1, the inlet water temperature correction value fix2=0 and … … of the indoor unit 2, and the inlet water temperature correction value fix =0 of the indoor unit n.
Then, every set time period T (e.g., 10 minutes), the following steps are performed:
step S21: the actual environment temperature of each indoor unit, the set environment temperature and the ratio of the starting time in the set time period are obtained.
The actual environment temperature of the ith indoor unit is Tcuri, the set environment temperature is Tset, and the ratio of the starting time in the set time period is Pi; i =1,2,3, … …, n.
Boot time ratio = boot time/set time period within a set time period. If the set time period is 10 minutes and the turn-on time of the ith indoor unit in the set time period is 5 minutes, the turn-on time ratio Pi =5/10=0.5 of the indoor unit.
And a temperature sensor is arranged in each indoor unit or in a room where the indoor unit is positioned, and the temperature sensor sends the acquired temperature signal to a controller of the indoor unit.
And the controller of each indoor unit is in communication connection with the main controller of the outdoor unit to carry out communication. And the controller of the indoor unit sends the temperature signal and other operation parameters of the indoor unit to the main controller of the outdoor unit.
A user sets indoor set environment temperature through a remote controller and sends the indoor set environment temperature to a controller of the indoor unit, and the controller of the indoor unit sends the indoor set environment temperature to a main controller of the outdoor unit.
Step S22: and determining the inlet water temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature and the set environment temperature.
The method specifically comprises the following steps:
(1) for the indoor unit with the starting time being within the range of 0, a), reducing the inlet water temperature correction value of the indoor unit by a set value; wherein 0< a < 1.
The indoor unit has small load requirement and can be cooled properly to save energy.
(2) And for the indoor unit with the starting time within the epsilon [ a,1), the inlet water temperature correction value of the indoor unit is kept unchanged.
The reason is that the starting time is reasonable, and the load demand of the indoor unit is reasonable, so the inlet water temperature of the indoor unit needs to be kept.
(3) For the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature being larger than b, the indoor unit is always started, the load demand is high, and the indoor temperature meets the requirement, and the inlet water temperature correction value of the indoor unit is kept unchanged; wherein b is greater than 0.
(4) And for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature is less than or equal to b, the indoor unit is always started, the load requirement is high, and the indoor temperature does not meet the requirement, and the inlet water temperature correction value of the indoor unit is increased by the set value. The indoor unit has high load demand, the indoor temperature does not meet the requirement, and the indoor unit needs to be further heated to meet the requirement of comfort of the user on the temperature.
Step S23: and comparing the inlet water temperature correction values of all the indoor units, and selecting the maximum value as the outlet water temperature correction value of the outdoor unit.
That is, the maximum value of the fix1, the fix2, … … and the fix n is selected, and the outdoor unit outlet water temperature correction value fix is equal to the maximum value.
Step S24: and correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value fix of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature.
And correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value fix of the outdoor unit, specifically, the current target outlet water temperature + fix of the outdoor unit. The corrected target outlet water temperature can be realized by adjusting the opening degree of an expansion valve between the outdoor heat exchanger and the water fluorine heat exchanger or the frequency of a compressor. The target outlet water temperature of the outdoor unit is also the target outlet water temperature of the water-fluorine heat exchanger.
The maximum value of the inlet water temperature correction values of all the indoor units is selected as the outlet water temperature correction value of the outdoor unit, the target outlet water temperature of the outdoor unit is corrected, the load requirements of all the indoor units are comprehensively considered, the temperature requirements of the room where each indoor unit is located are guaranteed to be met, the temperature comfort of users is improved, and the use experience of the users is improved.
In the control method of the water system air conditioner, under the heating condition, the actual environment temperature, the set environment temperature and the ratio of the starting time in the set time period of each indoor unit are obtained every set time period; determining a water inlet temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature and the set environment temperature; comparing the inlet water temperature correction values of all the indoor units, and selecting the maximum value as the outlet water temperature correction value of the outdoor unit; correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature; therefore, the temperature requirement of a room where each indoor unit is located is met, the temperature comfort of a user is improved, and the use experience of the user is improved; moreover, the control method is simple, convenient to implement and low in cost.
In this embodiment, the steps S21 to S24 are performed once every set time period T, that is, the outlet water temperature correction value of the outdoor unit is adjusted every set time period T, so as to correct the target outlet water temperature of the outdoor unit in time, so as to meet the temperature requirement of the room where each indoor unit is located in time, and improve the user experience.
According to the control method, the target outlet water temperature of the outdoor unit is corrected, so that the temperature of water automatically changes along with the change of the indoor temperature load, the indoor temperature meets the requirement of a user, the indoor temperature is constant, the comfort of the user is improved, and energy is saved.
In this embodiment, the set time periods T, a, and b and the value ranges of the set values are the same as those in the first embodiment, and specific reference may be made to the description in the first embodiment, which is not repeated here.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A control method for an air conditioner of a water system comprises an outdoor unit and at least one indoor unit, wherein a water outlet pipe of the outdoor unit is respectively connected with a water inlet pipe of each indoor unit, and a water inlet pipe of the outdoor unit is respectively connected with a water outlet pipe of each indoor unit; the method is characterized in that: the control method comprises the following steps:
when the water system air conditioner starts to perform refrigerating operation or the target outlet water temperature of the outdoor unit is reset in the refrigerating operation process, the outlet water temperature correction value of the outdoor unit is =0, and the inlet water temperature correction value of each indoor unit is = 0; then, the following steps are executed every set period of time:
(1) acquiring the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity of each indoor unit, and the ratio of the starting time in the set time period;
(2) determining a corrected value of the inlet water temperature of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature, the set environment temperature, the actual environment humidity and the set environment humidity;
(3) comparing the inlet water temperature correction values of all the indoor units, and selecting the minimum value as the outlet water temperature correction value of the outdoor unit;
(4) and correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature.
2. The control method according to claim 1, characterized in that: the step (2) specifically comprises the following steps:
(21) for the indoor unit with the startup time in the E [0, a):
when the actual environment humidity is larger than the set environment humidity, the inlet water temperature correction value of the indoor unit is reduced by the set value;
when the actual environment humidity is not more than the set environment humidity, the inlet water temperature correction value of the indoor unit is increased by a set value;
wherein 0< a < 1;
(22) for the indoor unit with the turn-on time in the E [ a, 1):
when the actual environment humidity is larger than the set environment humidity, the inlet water temperature correction value of the indoor unit is reduced by the set value;
when the actual environment humidity is not greater than the set environment humidity, the inlet water temperature correction value of the indoor unit is kept unchanged;
(23) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature being less than or equal to b:
when the actual environment humidity is larger than the set environment humidity, the inlet water temperature correction value of the indoor unit is reduced by the set value;
when the actual environment humidity is not greater than the set environment humidity, the inlet water temperature correction value of the indoor unit is kept unchanged;
wherein b is greater than 0;
(24) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature > b, the inlet water temperature correction value of the indoor unit is reduced by the set value.
3. The control method according to claim 1, characterized in that:
the actual environment humidity is actual absolute humidity, and a preset temperature-relative humidity-absolute humidity corresponding table is inquired according to the acquired actual relative humidity and the actual environment temperature to obtain the actual environment humidity;
and the set environment humidity is set absolute humidity, and the preset temperature-relative humidity-absolute humidity corresponding table is inquired according to preset set relative humidity and set environment temperature to obtain the set environment humidity.
4. The control method according to claim 1, characterized in that: the value range of the set time period is 3-30 minutes.
5. The control method according to claim 2, characterized in that: the value range of a is 0.1-0.9.
6. The control method according to claim 5, characterized in that: a is 0.7.
7. The control method according to claim 2, characterized in that: the value range of b is 0-2 ℃.
8. The control method according to claim 2, characterized in that: the value range of the set value is 0.1-5 ℃.
9. The control method according to claim 8, characterized in that: the set point was 0.5 ℃.
10. A control method for an air conditioner of a water system comprises an outdoor unit and at least one indoor unit, wherein a water outlet pipe of the outdoor unit is respectively connected with a water inlet pipe of each indoor unit, and a water inlet pipe of the outdoor unit is respectively connected with a water outlet pipe of each indoor unit; the method is characterized in that: the control method comprises the following steps:
when a water system air conditioner starts to perform heating operation or the target outlet water temperature of an outdoor unit is reset in the heating operation process, the outlet water temperature correction value of the outdoor unit is =0, and the inlet water temperature correction value of each indoor unit is = 0; then, the following steps are executed every set period of time:
(1) acquiring the actual environment temperature of each indoor unit, the set environment temperature and the ratio of the starting time in the set time period;
(2) determining the inlet water temperature correction value of each indoor unit according to the starting time ratio of each indoor unit, the actual environment temperature and the set environment temperature:
(21) for the indoor unit with the starting time being within the range of 0, a), reducing the inlet water temperature correction value of the indoor unit by a set value;
wherein 0< a < 1;
(22) for the indoor unit with the starting time in the E [ a,1 ], maintaining the inlet water temperature correction value of the indoor unit unchanged;
(23) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature > b, the inlet water temperature correction value of the indoor unit is kept unchanged; wherein b is greater than 0;
(24) for the indoor unit with the starting time ratio =1 and the difference between the actual environment temperature and the set environment temperature is less than or equal to b, increasing the inlet water temperature correction value of the indoor unit by a set value;
(3) comparing the inlet water temperature correction values of all the indoor units, and selecting the maximum value as the outlet water temperature correction value of the outdoor unit;
(4) and correcting the target outlet water temperature of the outdoor unit by adopting the outlet water temperature correction value of the outdoor unit, and controlling the operation of the water system air conditioner according to the corrected target outlet water temperature.
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| CN201810557213.2A CN108800488B (en) | 2018-06-01 | 2018-06-01 | Water system air conditioner control method |
| PCT/CN2018/113578 WO2019227851A1 (en) | 2018-06-01 | 2018-11-02 | Water-system air conditioner control method |
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| CN201810557213.2A CN108800488B (en) | 2018-06-01 | 2018-06-01 | Water system air conditioner control method |
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| CN109945433A (en) * | 2019-03-20 | 2019-06-28 | 珠海格力电器股份有限公司 | Temperature control method and air conditioner |
| CN110779232B (en) * | 2019-10-14 | 2020-11-24 | 珠海格力电器股份有限公司 | Control method and device for multi-connected cold and hot water unit and multi-connected cold and hot water unit |
| CN112032921B (en) * | 2020-08-06 | 2022-01-04 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN111895582A (en) * | 2020-08-06 | 2020-11-06 | 广东Tcl智能暖通设备有限公司 | Compressor control method and device and air conditioning system |
| CN112648695A (en) * | 2020-12-29 | 2021-04-13 | 明德倍适(天津)科技有限公司 | Radiation air conditioning system and temperature and humidity adjusting method |
| US11796201B2 (en) * | 2021-04-20 | 2023-10-24 | Lennox Industries Inc. | HVAC sensor validation while HVAC system is off |
| CN114017903B (en) * | 2021-10-29 | 2023-03-28 | 青岛海信日立空调系统有限公司 | Floor heating and air conditioning integrated machine |
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| WO2019227851A1 (en) | 2019-12-05 |
| CN108800488A (en) | 2018-11-13 |
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Effective date of registration: 20201112 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. |
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Application publication date: 20181113 Assignee: Qingdao Haier Center Air-conditioner Engineering Co.,Ltd. Assignor: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Contract record no.: X2023980042557 Denomination of invention: A Control Method for Water System Air Conditioning Granted publication date: 20201127 License type: Common License Record date: 20230926 |