CN111425968A - Fan coil and floor radiation combined cooling control system and method - Google Patents
Fan coil and floor radiation combined cooling control system and method Download PDFInfo
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- CN111425968A CN111425968A CN202010182576.XA CN202010182576A CN111425968A CN 111425968 A CN111425968 A CN 111425968A CN 202010182576 A CN202010182576 A CN 202010182576A CN 111425968 A CN111425968 A CN 111425968A
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0089—Systems using radiation from walls or panels
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a combined cooling control system and method for fan coil and floor radiation. The invention comprises a refrigeration host, a fan coil and a ground cooling coil; the refrigeration host consists of a closed expansion water tank, a plate-type evaporator and a water storage tank which are connected in sequence; the fan coil and the ground cooling coil are connected in parallel to a refrigeration host; the outlet of the closed expansion water tank is sequentially connected with a fan coil of a first water pump; the outlet of the closed expansion water tank is connected with a second water pump and a water dividing and collecting device in sequence; the outlet of the fan coil and the outlet of the ground cooling coil are both connected with the inlet of the water storage tank through the filter. The invention adopts the connection mode that the fan coil and the ground cooling coil are connected in parallel, so that the radiation cold supply switching between the fan coil and the floor is flexible, and the radiation cold inertia of the floor is improved to a certain extent; meanwhile, the lift of the circulating pump is not too large, and the complementary advantages of the fan coil and the radiant cooling of the floor are realized.
Description
Technical Field
The invention belongs to the technical field of indoor air conditioner implementation, and particularly relates to a combined cooling control system and method for fan coil and floor radiation.
Background
When the floor radiation is used for cooling in hot and high-humidity areas in summer, when the temperature of cold water in the coil pipe is too low and the ground temperature is lower than the dew point temperature of indoor air, the condensation phenomenon can occur on the ground; if the temperature of the cold water in the coil pipe is too high, although condensation is not generated, the problem of insufficient cooling amount exists; finally, considering that the air conditioning system is stopped when users go out again, the system is often in an intermittent working state, and the starting time of the system is too long due to cold inertia of floor radiation cooling, so that the comfort of the users is affected. And the fan coil is independently adopted to reduce the indoor temperature, the air supply of the fan coil belongs to forced convection, the indoor temperature distribution is uneven, and the comfort is poor.
According to the problem, the application file provides that the advantages of the fan coil and the floor radiation cooling are complemented, the problem that the radiation floor is slow to start is solved, the problem that the radiation floor is frosted can be solved, and meanwhile, the advantage that the indoor temperature of the radiation floor cooling is uniform can be kept.
Disclosure of Invention
The invention aims to provide a combined cooling control system and method for fan coil and floor radiation, wherein the fan coil and the floor radiation cooling are flexibly switched by adopting a connection mode that the fan coil and the floor radiation coil are connected in parallel, if the floor radiation cooling is only started, the circulating water flow of the floor radiation coil is increased, the starting time is shortened, the cold inertia of the floor radiation is improved to a certain extent, and the problems of the cold inertia of the existing floor radiation, long starting time and uneven indoor temperature distribution caused by the fan coil are solved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a fan coil and floor radiation combined cooling control system, which comprises a refrigeration host, a fan coil, a ground cooling coil, a first water pump, a second water pump, a water collecting and collecting device and a filter, wherein the fan coil is arranged on the refrigeration host;
the refrigeration host consists of a closed expansion water tank, a plate-type evaporator and a water storage tank which are connected in sequence;
the fan coil and the ground cooling coil are connected in parallel to a refrigeration host; the outlet of the closed expansion water tank is connected with the inlet of the first water pump; the outlet of the first water pump is connected with a fan coil; the outlet of the closed expansion water tank is connected with the inlet of a second water pump; the outlet of the second water pump is connected with the inlet of the water dividing and collecting device; the outlet of the water dividing and collecting device is connected with the inlet of the ground cooling coil;
and the outlet of the fan coil and the outlet of the ground cooling coil are both connected with the inlet of the water storage tank through a filter.
Preferably, valves are arranged on the connecting pipelines of the refrigeration host and the fan coil.
Preferably, valves are arranged on the connecting pipelines of the refrigeration main machine and the ground cooling coil.
Preferably, the fan coil adopts an indoor air temperature and dew point temperature control mode; the floor radiation adopts a floor surface temperature control mode.
The invention relates to a combined cooling control method for fan coil and floor radiation, which comprises the following steps:
step S1: starting the air source heat pump;
step S2: controlling an electromagnetic valve of the fan coil and a circulating water pump to be opened, and starting the fan coil;
step S3: the system judges whether the indoor temperature reaches 26 ℃ which is preset or not;
if not, continuously operating the fan coil to eliminate the indoor cold load;
if yes, go to step S4;
step S4: controlling a floor radiation electromagnetic valve or a circulating water pump to be started, and starting floor radiation cooling;
step S5: judging whether Tmin probe is less than Tdew +1.2 ℃ or Tmin probe is less than 22 ℃;
if not, the floor radiation continuously operates;
if yes, go to step S6;
step S6: the water supply temperature of the floor is changed, and the T supply is more than 11 ℃ and less than 18 ℃.
Preferably, in the step S5, Tmin is detected as a minimum temperature among the indoor air temperatures measured by four temperature probes installed at indoor corners, tmlu is expressed as a dew point temperature, and Tmin is expressed as a supply water temperature radiated from the floor.
The invention has the following beneficial effects:
the invention adopts the connection mode that the fan coil and the ground cooling coil are connected in parallel, so that the radiation cold supply switching between the fan coil and the floor is flexible, and the radiation cold inertia of the floor is improved to a certain extent; meanwhile, the lift of the circulating pump is not too large, and the complementary advantages of the fan coil and the radiant cooling of the floor are realized.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a fan coil and floor radiation combined cooling control system according to the present invention;
FIG. 2 is a step diagram of a method for controlling cooling by combining fan coil and floor radiation according to the present 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.
Referring to fig. 1, the present invention is a combined cooling control system of fan coil and floor radiation, including a main cooling unit 1, a fan coil 7, a ground cooling coil 9, a first water pump 4, a second water pump 10, a water collector 8, and a filter 6;
the refrigeration host 1 consists of a closed expansion water tank 5, a plate-type evaporator 2 and a water storage tank 3 which are connected in sequence;
the outlet of the closed expansion water tank 5 is connected with the inlet of the first water pump 4;
the outlet of the closed expansion water tank 5 is connected with the inlet of a second water pump 10; the outlet of the second water pump 10 is connected with the inlet of the water dividing and collecting device 8;
the fan coil 7 and the ground cooling coil 9 are connected in parallel with each other and are connected to the refrigeration main machine 1;
the outlet of the first water pump 4 is connected with a fan coil 7; the outlet of the water collecting and distributing device 8 is connected with the inlet of the ground cooling coil 9;
the outlet of the fan coil 7 and the outlet of the ground cooling coil 9 are both connected with the inlet of the water storage tank 3 through the filter 6.
Wherein, the connecting pipeline of the refrigeration host 1 and the fan coil 7 is provided with valves.
Wherein, the connecting pipelines of the refrigeration host 1 and the ground cooling coil 9 are provided with valves.
The fan coil 7 adopts an indoor air temperature and dew point temperature control mode; the floor radiation adopts a floor surface temperature control mode.
Referring to fig. 2, the present invention relates to a combined cooling control method for fan coil and floor radiation, which includes the following steps:
step S1: starting the air source heat pump;
step S2: controlling an electromagnetic valve of the fan coil and a circulating water pump to be opened, and starting the fan coil;
step S3: the system judges whether the indoor temperature reaches 26 ℃ which is preset or not;
if not, continuously operating the fan coil to eliminate the indoor cold load;
if yes, go to step S4;
step S4: controlling a floor radiation electromagnetic valve or a circulating water pump to be started, and starting floor radiation cooling;
step S5: judging whether Tmin probe is less than Tdew +1.2 ℃ or Tmin probe is less than 22 ℃;
if not, the floor radiation continuously operates;
if yes, go to step S6;
step S6: the water supply temperature of the floor is changed, and the T supply is more than 11 ℃ and less than 18 ℃.
In step S5, Tmin is detected as the minimum temperature among the indoor air temperatures measured by four temperature probes installed at indoor corners, tmlu is expressed as dew point temperature, and Tmin is expressed as supply water temperature of floor radiation.
One specific application of this embodiment is:
the radiation floor has the defects of slow starting and easy frosting, and has the advantage of uniform indoor temperature of the radiation floor for cooling; the fan coil works to play a role in effective air circulation, so that the indoor air can more uniformly process the humidity in the air instead of directly participating in refrigeration and cooling; on the other hand, the ground radiation aims at realizing high-temperature refrigeration, avoiding the requirement of head and foot warming caused by ground temperature supercooling, and avoiding the problem of frosting.
Therefore, the application document proposes that the advantages of the fan coil and the floor radiation cooling combination are complemented; the parallel connection mode is selected, the fan coil and the floor radiation cooling are flexibly switched, if the floor radiation cooling is only started, the circulating water flow of the ground cooling coil is increased, the starting time is shortened, the cold inertia of the floor radiation is improved to a certain extent, and the delivery lift of the circulating pump is not too large; on the other hand, the application document provides a fan coil and floor radiation temperature control mode. Namely: the fan coil adopts an indoor air temperature and dew point temperature control mode, and the floor radiation adopts a floor surface temperature control mode.
The specific working process is as follows:
in order to prevent the radiation of the floor from dewing, the water supply temperature and the water return temperature of the host computer to the ground cooling coil are not lower than the dew point temperature of the indoor air, and the part of the wet load for eliminating the moisture content of the indoor air exceeding the moisture content of the air in a design state before the radiation of the floor cooling system is started is called as the radiation starting wet load of the floor, and the radiation starting wet load of the floor is borne by the fan coil. Namely, the fan coil is started first to reduce the indoor temperature. When the fan coil is independently started, the water supply temperature of the air source heat pump host is generally 7 ℃, the water supply temperature of the independently started floor radiation cooling is generally 11-18 ℃, and in order to avoid the problem of floor cooling condensation, the water supply temperature can be 11-18 ℃ when the fan coil and the floor radiation combined cooling are used for ensuring the indoor cooling load requirement. The ground temperature of cooling in summer is preferably higher than 18 ℃, the temperature is generally 18-20 ℃, and the indoor design temperature is 26 ℃. According to the investigation of human satisfaction, when the indoor floor temperature is 22-25 ℃, the feet feel the most comfortable.
As shown in fig. 2, a fan coil is connected with a floor in parallel in a radiation manner, when an air source heat pump is started, an electromagnetic valve for controlling the fan coil and a circulating water pump 4 are firstly started, namely the fan coil is started, and the circulating water pump 4 for floor radiation is closed at the moment, so that indoor cold load is eliminated by starting the fan coil, the purpose is to quickly cool down a room until the indoor design temperature is 26 ℃, the indoor temperature is 26 ℃ and is recorded as T, a signal is transmitted to the electromagnetic valve for controlling floor radiation cooling, the T is used as a condition for starting floor radiation cooling, and when the indoor temperature is judged as T, the floor radiation electromagnetic valve or the circulating water pump is controlled to be started, namely the floor radiation cooling is started. Meanwhile, 4 temperature sensing probes installed near indoor corners test the indoor air temperature, the 4 temperature sensing probes take the minimum temperature and are marked as Tmin probe, the dew point temperature is marked as Tdew, and the temperature of the Tdew is the temperature of the air when the air is cooled to saturation under the condition that the atmospheric pressure and the air moisture content are constant, and is a constant value. In order to ensure the stable operation of the radiation cooling of the floor, a certain margin is given to the dew point temperature, namely Tmin probe is more than Tdew +1.2 ℃, the radiation cooling of the floor is started all the time, along with the continuous increase of the time for starting the radiation cooling of the floor, when the Tmin probe is less than the Tdew +1.2 ℃ or the Tmin probe is less than 22 ℃ (22 ℃ is the lower limit temperature for the foot feeling of a human body), a signal is transmitted to a host machine to enable the radiation water supply temperature of the floor to be increased, 18 ℃ is the upper limit, but when the Tmin probe is more than 25 ℃, the water supply temperature is reduced, 11 ℃ is the lower limit, and the.
It should be noted that, in the above system embodiment, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In addition, it is understood by those skilled in the art that all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing associated hardware, and the corresponding program may be stored in a computer-readable storage medium.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A combined cooling control system of a fan coil and floor radiation comprises a refrigeration host (1), a fan coil (7), a ground cooling coil (9), a first water pump (4), a second water pump (10), a water collecting and collecting device (8) and a filter (6); the method is characterized in that:
the refrigeration main machine (1) consists of a closed expansion water tank (5), a plate-type evaporator (2) and a water storage tank (3) which are connected in sequence;
the outlet of the closed expansion water tank (5) is connected with the inlet of the first water pump (4);
the outlet of the closed expansion water tank (5) is connected with the inlet of a second water pump (10); the outlet of the second water pump (10) is connected with the inlet of the water dividing and collecting device (8);
the fan coil (7) and the ground cooling coil (9) are connected in parallel to the refrigeration host (1);
the outlet of the first water pump (4) is connected with a fan coil (7); the outlet of the water collecting and distributing device (8) is connected with the inlet of the ground cooling coil (9);
the outlet of the fan coil (7) and the outlet of the ground cooling coil (9) are connected with the inlet of the water storage tank (3) through the filter (6).
2. A fan coil and floor radiation combined cooling control system as claimed in claim 1, wherein valves are provided on the connection pipes of the main cooling unit (1) and the fan coil (7).
3. A fan coil and floor radiation combined cooling control system as claimed in claim 1 or 2, characterized in that the connection pipes of the main cooling unit (1) and the ground cooling coil (9) are provided with valves.
4. A fan coil and floor radiation combined cooling control system as claimed in any one of claims 3, characterised in that the fan coil (7) is controlled by means of indoor air temperature and dew point temperature; the floor radiation adopts a floor surface temperature control mode.
5. A combined cooling control method for fan coil and floor radiation is characterized by comprising the following steps:
step S1: starting the air source heat pump;
step S2: controlling an electromagnetic valve of the fan coil and a circulating water pump to be opened, and starting the fan coil;
step S3: the system judges whether the indoor temperature reaches 26 ℃ which is preset or not;
if not, continuously operating the fan coil to eliminate the indoor cold load;
if yes, go to step S4;
step S4: controlling a floor radiation electromagnetic valve or a circulating water pump to be started, and starting floor radiation cooling;
step S5: judging whether Tmin probe is less than Tdew +1.2 ℃ or Tmin probe is less than 22 ℃;
if not, the floor radiation continuously operates;
if yes, go to step S6;
step S6: the water supply temperature of the floor is changed, and the T supply is more than 11 ℃ and less than 18 ℃.
6. A fan coil and floor radiation combined cooling control method as claimed in claim 5, wherein in step S5, Tmin probe tests the minimum temperature of indoor air temperature for four temperature probes installed at indoor corners, Tdew is expressed as dew point temperature, and Tsupply is expressed as supply water temperature of floor radiation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182576.XA CN111425968A (en) | 2020-03-16 | 2020-03-16 | Fan coil and floor radiation combined cooling control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182576.XA CN111425968A (en) | 2020-03-16 | 2020-03-16 | Fan coil and floor radiation combined cooling control system and method |
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| CN111425968A true CN111425968A (en) | 2020-07-17 |
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| CN202010182576.XA Pending CN111425968A (en) | 2020-03-16 | 2020-03-16 | Fan coil and floor radiation combined cooling control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344461A (en) * | 2020-11-04 | 2021-02-09 | 青岛海信日立空调系统有限公司 | Water system air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101251282A (en) * | 2008-04-03 | 2008-08-27 | 东南大学 | Water chilling unit based on hot moisture independent process as well as air-treatment method thereof |
| CN102538112A (en) * | 2012-03-20 | 2012-07-04 | 上海理工大学 | Household heat and humidity separate control radiation air conditioning system and control method thereof |
| CN103486681A (en) * | 2013-09-24 | 2014-01-01 | 陈万仁 | Wind source heat pump system capable of conducting radiant cooling and heating by using phase transformation energy of compressed steam |
| CN103913006A (en) * | 2014-04-28 | 2014-07-09 | 科希曼电器有限公司 | Floor heating and air conditioning integrated device based on air source heat pump technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344461A (en) * | 2020-11-04 | 2021-02-09 | 青岛海信日立空调系统有限公司 | Water system air conditioner |
| CN112344461B (en) * | 2020-11-04 | 2022-04-01 | 青岛海信日立空调系统有限公司 | Water system air conditioner |
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Application publication date: 20200717 |
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