CN114294710A - Fin type heat exchanger, fan coil and control method thereof - Google Patents
Fin type heat exchanger, fan coil and control method thereof Download PDFInfo
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- CN114294710A CN114294710A CN202111617031.8A CN202111617031A CN114294710A CN 114294710 A CN114294710 A CN 114294710A CN 202111617031 A CN202111617031 A CN 202111617031A CN 114294710 A CN114294710 A CN 114294710A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The application provides a finned heat exchanger, a fan coil and a control method of the fan coil. The finned heat exchanger comprises a heat exchange tube (1), heat exchange fins (2) and an adjusting mechanism (3), wherein the heat exchange tube (1) is arranged in the heat exchange fins (2) in a penetrating mode, the adjusting mechanism (3) is in driving connection with the heat exchange fins (2), and the distance between the heat exchange fins (2) can be adjusted. According to the finned heat exchanger, the problem that the fin distance of the finned heat exchanger is limited to cause poor adaptability to changeable environment working conditions can be solved.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a finned heat exchanger, a fan coil and a control method of the fan coil.
Background
At present, an air duct and a finned heat exchanger of a fan coil are fixed and immovable, and are poor in adaptability to variable environmental working conditions. For example, under a certain sheet spacing and water supply temperature, if the heat exchange quantity is to be improved, the heat exchange quantity can only be realized by adjusting the air quantity, and the comfort is easy to deteriorate if the air quantity is too large; or the pressure loss is increased due to the filth blockage of the filter of the unit, the rotating speed of the fan must be increased when the original air volume is reached, and meanwhile, the power consumption of the whole machine is increased, the temperature rise of the motor is overhigh and the like.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to provide a fin type heat exchanger, a fan coil and a control method thereof, and the problem that the fin type heat exchanger is poor in adaptability to variable environmental conditions due to the fact that the fin distance is limited can be solved.
In order to solve the problems, the application provides a fin type heat exchanger which comprises a heat exchange tube, heat exchange fins and an adjusting mechanism, wherein the heat exchange tube is arranged in the heat exchange fins in a penetrating mode, the adjusting mechanism is in driving connection with the heat exchange fins, and the distance between the heat exchange fins can be adjusted.
Preferably, the heat exchange fins are provided with pipe holes, the heat exchange pipes penetrate through the pipe holes, and arc-shaped chamfers are formed at two ends of the hole walls of the pipe holes.
Preferably, the heat exchange fin is provided with a tube hole, the heat exchange tube penetrates through the tube hole, two ends of the tube hole are respectively provided with a flanging, the flanging is turned over towards the direction far away from the heat exchange tube, and an arc-shaped chamfer is formed at the turning-over position.
Preferably, the heat exchange fin is provided with a pipe hole, the heat exchange pipe penetrates through the pipe hole, and the outer wall of the heat exchange pipe and/or the inner wall of the pipe hole are/is coated with lubricating oil.
Preferably, the adjusting mechanism comprises a telescopic mechanism, the telescopic mechanism is arranged between two adjacent heat exchange fins, one end of the telescopic mechanism is connected to one of the heat exchange fins, and the other end of the telescopic mechanism is connected to the other heat exchange fin.
Preferably, the four corners of the heat exchange fins are respectively provided with a telescopic mechanism.
Preferably, the telescopic mechanism comprises a telescopic cylinder.
Preferably, the adjusting mechanism comprises a telescopic mechanism and an elastic part, the elastic part is arranged between two adjacent heat exchange fins, one end of the elastic part is connected to one of the heat exchange fins, the other end of the elastic part is connected to the other heat exchange fin, and the telescopic mechanism is connected to the heat exchange fin on the outermost edge of the heat exchange tube and controls the position of the heat exchange fin through telescopic action.
Preferably, the heat exchange fin positioned at the outermost edge of the first end of the heat exchange tube is of a fixed structure, and the driving end of the telescopic mechanism is connected to the heat exchange fin positioned at the outermost edge of the second end of the heat exchange tube.
Preferably, the outermost heat exchange fin at the second end of the heat exchange tube is fixedly connected with an air duct shell side plate, and the driving end of the telescopic mechanism is fixedly connected to the air duct shell side plate and drives the heat exchange fin to move through the air duct shell side plate.
Preferably, the heat exchange fins positioned in the middle of the heat exchange tube are of fixed structures, the number of the telescopic mechanisms is two, the driving end of one telescopic mechanism is connected to the heat exchange fin on the outermost edge of the first end of the heat exchange tube, and the driving end of the other telescopic mechanism is connected to the heat exchange fin on the outermost edge of the second end of the heat exchange tube.
According to another aspect of the application, a fan coil is provided, which comprises a finned heat exchanger, wherein the finned heat exchanger is the finned heat exchanger.
Preferably, the fan coil further comprises a shell, an air inlet and an air outlet are formed in the shell, a fan and a fin type heat exchanger are arranged in the shell, a pressure sensor and an air outlet temperature and humidity sensor are arranged on the air outlet side of the fin type heat exchanger, an air inlet temperature and humidity sensor is arranged at the air inlet, and the fin type heat exchanger adjusts the fin distance among the heat exchange fins according to data measured by the pressure sensor, the air outlet temperature and humidity sensor and the air inlet temperature and humidity sensor.
Preferably, the air inlet is provided with a fresh air pipeline, a fresh air valve is arranged in the fresh air pipeline, and the air inlet temperature and humidity sensor is arranged in the fresh air pipeline.
Preferably, a water inlet temperature sensor is arranged at the water inlet end of the finned heat exchanger.
According to another aspect of the application, a control method of the fan coil is provided, and the control method comprises the following steps:
determining the current fin pitch of the heat exchange fins;
determining the cross-sectional area of the air outlet;
determining a required target wind speed;
calculating the current wind speed according to the pressure difference between the air inlet and the air outlet;
adjusting the rotating speed of the fan according to the difference value between the current wind speed and the target wind speed;
judging whether the maximum rotating speed of the fan reaches the required air volume or not;
when the required air volume is not reached, reversely deducing the target sheet distance according to the maximum rotating speed;
and adjusting the plate pitch of the heat exchange fins to a target plate pitch.
Preferably, the control method further includes:
in the heat exchange mode, after the heat exchange fins are adjusted to the target fin pitch t for time, the maximum heat exchange amount still does not reach x% of the set heat exchange amount, the unit is prompted to need to be cleaned, and the fin pitch of the heat exchange fins is adjusted to the maximum;
or the like, or, alternatively,
in the air supply mode, after the heat exchange fins are adjusted to the target fin pitch t, the maximum air volume does not reach x% of the set air volume, the unit is prompted to need to be cleaned, and the fin pitch of the heat exchange fins is adjusted to the maximum.
The application provides a finned heat exchanger, including heat exchange tube, heat transfer fin and adjustment mechanism, the heat exchange tube is worn to establish in the heat transfer fin, and adjustment mechanism and heat transfer fin drive are connected to can adjust the interval between the heat transfer fin. When the fan coil runs in different running modes or environmental working conditions, the finned heat exchanger can adjust the pressure loss and the heat exchange capacity of the heat exchanger through the linkage transformation of the fin distance of the heat exchange fins and the rotating speed of the fan, and the effects of wide running range, strong comfort, energy conservation and the like are achieved. Meanwhile, when the unit and the heat exchanger are cleaned, the heat exchange fins can be adjusted to be large in pitch, so that the cleaning is convenient.
Drawings
Fig. 1 is a schematic structural diagram of a finned heat exchanger according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a fan coil according to one embodiment of the present application;
FIG. 3 is a flow chart of a fan coil control method according to one embodiment of the present application.
The reference numerals are represented as:
1. a heat exchange pipe; 2. heat exchange fins; 3. an adjustment mechanism; 4. an air duct housing side plate; 5. a housing; 6. an air inlet; 7. an air outlet; 8. a fan; 9. a finned heat exchanger; 10. a fresh air duct; 11. a fresh air valve; 12. a pressure sensor; 13. an air inlet temperature and humidity sensor; 14. air outlet temperature and humidity sensor.
Detailed Description
With reference to fig. 1 to 2, according to an embodiment of the present application, the fin heat exchanger includes a heat exchange tube 1, heat exchange fins 2 and an adjusting mechanism 3, the heat exchange tube 1 is inserted into the heat exchange fins 2, and the adjusting mechanism 3 is in driving connection with the heat exchange fins 2 and can adjust the distance between the heat exchange fins 2.
When the fan coil runs in different running modes or environmental working conditions, the finned heat exchanger can adjust the pressure loss and the heat exchange capacity of the heat exchanger through the linkage transformation of the fin distance of the heat exchange fins 2 and the rotating speed of the fan, and the effects of wide running range, strong comfort, energy conservation and the like are achieved. Meanwhile, when the unit and the heat exchanger are cleaned, the heat exchange fins 2 can be adjusted to be large in pitch, so that the cleaning is convenient.
In one embodiment, the heat exchange fin 2 is provided with a tube hole, the heat exchange tube 1 is arranged in the tube hole in a penetrating mode, and arc-shaped chamfers are formed at two ends of the wall of the tube hole. Form the arc chamfer through the pore wall both ends at the tube hole, can avoid forming the edge at the tip, and then avoid 2 along the gliding in-process of heat exchange tube 1 at heat transfer fin, scrape heat exchange tube 1, effectively protect heat exchange tube 1, also can utilize the arc chamfer to form the direction simultaneously, reduce the regulation degree of difficulty of heat transfer fin 2 on heat exchange tube 1, improve regulation efficiency.
In one embodiment, the heat exchange fin 2 is provided with a tube hole, the heat exchange tube 1 is inserted into the tube hole, two ends of the tube hole are respectively provided with a flanging, the flanging is turned towards a direction far away from the heat exchange tube 1, and an arc-shaped chamfer is formed at the turning position. In this embodiment, form the turn-ups through the tube hole both ends at heat transfer fin 2 to make the turn-ups form arc chamfer in a position department of rolling over, can utilize turn-ups increase heat transfer fin 2 and heat exchange tube 1's area of contact on the one hand, improve heat exchange efficiency between them, on the other hand can utilize the great area of contact that forms between heat transfer fin 2 and the heat exchange tube 1, improve the stability of the cooperation structure between heat transfer fin 2 and the heat exchange tube 1, effectively avoid taking place the fall sheet phenomenon.
In addition, the arc chamfer that the turn-ups formed in the position department of turning over can avoid forming the edge at the tip, and then avoids scraping heat exchange tube 1 along the gliding in-process of heat exchange tube 1 at heat exchange fin 2, effectively protects heat exchange tube 1, also can utilize the arc chamfer to form the direction simultaneously, reduces the regulation degree of difficulty of heat exchange fin 2 on heat exchange tube 1, improves regulation efficiency.
In one embodiment, the heat exchange fin 2 is provided with a pipe hole, the heat exchange pipe 1 is arranged in the pipe hole in a penetrating mode, and the outer wall of the heat exchange pipe 1 and/or the inner wall of the pipe hole are/is coated with lubricating oil. Through coating lubricating oil in the cooperation position department of heat exchange tube 1 and heat transfer fin 2, can reduce the sliding friction power between heat exchange tube 1 and the heat transfer fin 2 on the one hand, reduce the friction loss that heat transfer tube 1 caused among the heat transfer fin 2 slip process, on the other hand can further increase the effective area of contact between heat exchange tube 1 and the heat transfer fin 2 through lubricating oil, further improves heat exchange efficiency.
In one embodiment, the adjusting mechanism 3 comprises a telescopic mechanism, the telescopic mechanism is arranged between two adjacent heat exchange fins 2, one end of the telescopic mechanism is connected to one of the heat exchange fins 2, and the other end of the telescopic mechanism is connected to the other heat exchange fin 2. In this embodiment, all be provided with telescopic machanism between per two adjacent heat transfer fin 2, can utilize telescopic machanism's flexible to realize the piece apart from adjusting between the heat transfer fin 2. The telescopic mechanism is, for example, a hydraulic cylinder or an air cylinder. The specifications of the telescopic mechanisms between any two adjacent heat exchange fins 2 are consistent, the consistency of the sliding adjustment action of each heat exchange fin 2 can be ensured, and the difficulty of the sliding adjustment of the heat exchange fins 2 is reduced.
In one embodiment, the four corners of the heat exchange fins 2 are respectively provided with the telescopic mechanisms, so that the stress of each direction of the heat exchange fins 2 is basically balanced in the fin pitch adjusting process, the phenomenon of blocking due to unbalanced stress is avoided, and the reliability of fin pitch adjustment is improved.
In one embodiment, the telescopic mechanism comprises a telescopic cylinder, such as a hydraulic or pneumatic cylinder.
In this embodiment, the adjustment of different pitches of the heat exchange fins 2 can be realized according to different requirements, for example, the pitch between one group of adjacent heat exchange fins 2 is a, and the pitch between another group of adjacent heat exchange fins 2 is b, where a ≠ b. The telescopic mechanisms between the adjacent heat exchange fins 2 in the same group are used as one group, and the telescopic mechanisms in different groups can be respectively controlled, so that the adjustment of different intervals between the heat exchange fins 2 in different groups is realized, and the requirement on adjusting the fin distance of the heat exchange fins 2 is better met.
In one embodiment, the adjusting mechanism 3 includes a telescopic mechanism and an elastic member, the elastic member is disposed between two adjacent heat exchange fins 2, one end of the elastic member is connected to one of the heat exchange fins 2, the other end of the elastic member is connected to the other heat exchange fin 2, the telescopic mechanism is connected to the heat exchange fin 2 at the outermost edge of the heat exchange tube 1, and the position of the heat exchange fin 2 is controlled by telescoping.
In this embodiment, because connect through the elastic component for example spring between the adjacent heat transfer fin 2, consequently, only need carry out position control to a heat transfer fin 2 at most marginal, other heat transfer fin 2 can carry out self-adaptation regulation under the elastic force effect of elastic component, realizes the regulation of all heat transfer fin 2's piece distance, can save the quantity of telescopic machanism by a wide margin, reduces the regulation degree of difficulty.
In one embodiment, the outermost heat exchange fin 2 at the first end of the heat exchange tube 1 is a fixed structure, and the driving end of the telescopic mechanism is connected to the outermost heat exchange fin 2 at the second end of the heat exchange tube 1.
In one embodiment, the outermost heat exchange fin 2 at the second end of the heat exchange tube 1 is fixedly connected with an air duct shell side plate 4, and the driving end of the telescopic mechanism is fixedly connected to the air duct shell side plate 4 and drives the heat exchange fin 2 to move through the air duct shell side plate 4.
In one embodiment, the heat exchange fins 2 located in the middle of the heat exchange tube 1 are fixed structures, and the number of the telescopic mechanisms is two, wherein the driving end of one telescopic mechanism is connected to the outermost heat exchange fin 2 at the first end of the heat exchange tube 1, and the driving end of the other telescopic mechanism is connected to the outermost heat exchange fin 2 at the second end of the heat exchange tube 1.
According to the embodiment of the application, the fan coil comprises the finned heat exchanger 9, and the finned heat exchanger 9 is the finned heat exchanger.
The fan coil further comprises a shell 5, an air inlet 6 and an air outlet 7 are formed in the shell 5, a fan 8 and a fin type heat exchanger 9 are arranged in the shell 5, a pressure sensor 12 and an air outlet temperature and humidity sensor 14 are arranged on the air outlet side of the fin type heat exchanger 9, an air inlet temperature and humidity sensor 13 is arranged at the air inlet 6, and the fin type heat exchanger 9 adjusts the fin distance between the heat exchange fins 2 according to data measured by the pressure sensor 12, the air outlet temperature and humidity sensor 14 and the air inlet temperature and humidity sensor 13.
The air inlet 6 is provided with a fresh air pipeline 10, a fresh air valve 11 is arranged in the fresh air pipeline 10, and an air inlet temperature and humidity sensor 13 is arranged in the fresh air pipeline 10.
And a water inlet temperature sensor is arranged at the water inlet end of the finned heat exchanger 9.
The sensor is, for example, a heat-sensitive sensor or an infrared sensor.
Referring to fig. 3 in combination, according to an embodiment of the present application, the control method for the fan coil includes: determining the current fin pitch of the heat exchange fins 2; determining the cross-sectional area of the tuyere 7; determining a required target wind speed; calculating the current wind speed according to the pressure difference between the air inlet 6 and the air outlet 7; adjusting the rotating speed of the fan 8 according to the difference value between the current wind speed and the target wind speed; judging whether the rotating speed of the fan 8 reaches the required air quantity or not when the rotating speed is maximum; when the required air volume is not reached, reversely deducing the target sheet distance according to the maximum rotating speed; and adjusting the plate pitch of the heat exchange fins 2 to the target plate pitch.
The control method further comprises the following steps: in the heat exchange mode, after the heat exchange fins 2 are adjusted to the target fin pitch t for time, the maximum heat exchange amount still does not reach x% of the set heat exchange amount, the unit is prompted to need to be cleaned, and the fin pitch of the heat exchange fins 2 is adjusted to the maximum; or, in the air supply mode, after the heat exchange fins 2 are adjusted to the target fin pitch t, the maximum air volume does not reach x% of the set air volume, the unit is prompted to need to be cleaned, and the fin pitch of the heat exchange fins 2 is adjusted to the maximum.
In this embodiment, when the plate distance between the heat exchange fins 2 needs to be adjusted, firstly, the air inlet temperature and humidity, the air outlet temperature and humidity and the water inlet temperature are detected, then the controller can calculate the current plate distance of the heat exchange fins 2 according to an empirical formula and the set air outlet temperature, and simultaneously, the cross-sectional area of the air outlet at the moment can be calculated. When the rotating speed of the fan is adjusted, if the maximum rotating speed allowed by the fan is reached but the required air volume is not reached, the target sheet distance is reversely pushed again according to the maximum rotating speed, and the optimal running state is finally coupled out through repeated adjustment, so that the air outlet temperature reaches the set temperature.
The control process of the fan coil in each mode is as follows:
when the coil of the fan 8 is in the internal circulation heat exchange mode, the fresh air valve 11 is closed, the water valve in the finned heat exchanger 9 is opened, and the rotating speed of the fan 8 and the fin distance of the heat exchange fins 2 during operation are determined according to the fin distance adjusting step.
When the coil of the fan 8 is in the external circulation heat exchange mode, the fresh air valve 11 is opened, the water valve in the finned heat exchanger 9 is opened, and the rotating speed of the fan 8 and the fin distance of the heat exchange fins 2 during operation are determined according to the fin distance adjusting step.
When the coil of the fan 8 is in an internal circulation air supply mode, the fresh air valve 11 is closed, the water valve in the fin type heat exchanger 9 is closed, the distance between the heat exchange fins 2 is adjusted to be the maximum, the wind resistance of the fin type heat exchanger 9 is reduced to be the minimum, and the rotating speed of the fan 8 is adjusted according to the wind volume set by the gears and the actual wind volume detected by the air outlet pressure sensor 12.
When the coil of the fan 8 is in an external circulation air supply mode, the fresh air valve 11 is opened, the water valve in the fin type heat exchanger 9 is closed, the distance between the heat exchange fins 2 is adjusted to be maximum, the wind resistance of the fin type heat exchanger 9 is reduced to be minimum, and the rotating speed of the fan 8 is adjusted according to the wind volume set by the gears and the actual wind volume detected by the wind outlet pressure sensor 12.
When the coil of the fan 8 is in the cleaning mode, when the time t passes in the operation process of the heat exchange mode of the unit, the maximum heat exchange quantity still does not reach x percent (x is less than 100) of the set heat exchange quantity (temperature) in the period, or the maximum air quantity in the air supply mode does not reach x percent of the set air quantity, which indicates that the pressure loss in the unit is too large, the unit is prompted to need to be cleaned, and the unit is operated according to the scheme of obtaining the maximum heat exchange quantity/air quantity. When the unit is cleaned, a cleaning mode is selected, the fan 8 is closed, the fresh air valve 11 is closed, the water valve in the fin type heat exchanger 9 is closed, and the distance between the heat exchange fins 2 is adjusted to be the maximum so as to clean dirt in the heat exchanger.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (17)
1. The fin type heat exchanger is characterized by comprising a heat exchange tube (1), heat exchange fins (2) and an adjusting mechanism (3), wherein the heat exchange tube (1) is arranged in the heat exchange fins (2) in a penetrating mode, and the adjusting mechanism (3) is in driving connection with the heat exchange fins (2) and can adjust the distance between the heat exchange fins (2).
2. The finned heat exchanger as claimed in claim 1, wherein the heat exchange fins (2) are provided with tube holes, the heat exchange tubes (1) are arranged in the tube holes in a penetrating manner, and arc-shaped chamfers are formed at two ends of the wall of each tube hole.
3. The finned heat exchanger as claimed in claim 1, wherein the heat exchange fins (2) are provided with tube holes, the heat exchange tubes (1) are inserted into the tube holes, two ends of the tube holes are respectively provided with flanges, the flanges are turned over in a direction away from the heat exchange tubes (1), and arc-shaped chamfers are formed at the turning positions.
4. The finned heat exchanger according to claim 1, wherein the heat exchange fins (2) are provided with tube holes, the heat exchange tubes (1) are arranged in the tube holes in a penetrating manner, and the outer walls of the heat exchange tubes (1) and/or the inner walls of the tube holes are coated with lubricating oil.
5. The finned heat exchanger according to any one of claims 1 to 4, wherein the adjusting mechanism (3) comprises a telescoping mechanism, the telescoping mechanism is arranged between two adjacent heat exchange fins (2), one end of the telescoping mechanism is connected to one of the heat exchange fins (2), and the other end of the telescoping mechanism is connected to the other heat exchange fin (2).
6. The finned heat exchanger according to claim 5, wherein the four corners of the heat exchange fins (2) are respectively provided with the telescoping mechanisms.
7. The finned heat exchanger of claim 5 wherein the telescoping mechanism comprises a telescoping cylinder.
8. The finned heat exchanger according to any one of claims 1 to 4, wherein the adjusting mechanism (3) comprises a telescopic mechanism and an elastic member, the elastic member is arranged between two adjacent heat exchange fins (2), one end of the elastic member is connected to one of the heat exchange fins (2), the other end of the elastic member is connected to the other heat exchange fin (2), and the telescopic mechanism is connected to the heat exchange fin (2) at the outermost edge of the heat exchange tube (1) and controls the position of the heat exchange fin (2) through telescopic movement.
9. The finned heat exchanger according to claim 8, wherein the outermost heat exchange fin (2) at the first end of the heat exchange tube (1) is a fixed structure, and the driving end of the telescopic mechanism is connected to the outermost heat exchange fin (2) at the second end of the heat exchange tube (1).
10. The finned heat exchanger according to claim 9, wherein the outermost edge of the second end of the heat exchange tube (1) is fixedly connected with an air duct shell side plate (4), and the driving end of the telescopic mechanism is fixedly connected to the air duct shell side plate (4) and drives the heat exchange fins (2) to displace through the air duct shell side plate (4).
11. The finned heat exchanger according to claim 8, wherein the heat exchange fins (2) in the middle of the heat exchange tube (1) are fixed structures, and the number of the telescopic mechanisms is two, wherein the driving end of one telescopic mechanism is connected to the outermost heat exchange fin (2) at the first end of the heat exchange tube (1), and the driving end of the other telescopic mechanism is connected to the outermost heat exchange fin (2) at the second end of the heat exchange tube (1).
12. A fan coil comprising a finned heat exchanger (9), characterized in that the finned heat exchanger (9) is a finned heat exchanger according to any one of claims 1 to 11.
13. The fan coil according to claim 12, further comprising a housing (5), wherein an air inlet (6) and an air outlet (7) are provided on the housing (5), a fan (8) and the finned heat exchanger (9) are provided in the housing (5), a pressure sensor (12) and an air outlet temperature and humidity sensor (14) are provided on an air outlet side of the finned heat exchanger (9), an air inlet temperature and humidity sensor (13) is provided at the air inlet (6), and the finned heat exchanger (9) adjusts a pitch between the heat exchange fins (2) according to data measured by the pressure sensor (12), the air outlet temperature and humidity sensor (14) and the air inlet temperature and humidity sensor (13).
14. A fan coil according to claim 13, wherein the air inlet (6) is provided with a fresh air duct (10), a fresh air valve (11) is provided in the fresh air duct (10), and the air inlet temperature and humidity sensor (13) is provided in the fresh air duct (10).
15. A fan coil according to claim 13, characterized in that the inlet end of the finned heat exchanger (9) is provided with a water inlet temperature sensor.
16. A method of controlling a fan coil as claimed in any one of claims 13 to 15, comprising:
determining the current fin pitch of the heat exchange fins (2);
determining the cross-sectional area of the air outlet (7);
determining a required target wind speed;
calculating the current wind speed according to the pressure difference between the air inlet (6) and the air outlet (7);
adjusting the rotating speed of a fan (8) according to the difference value of the current wind speed and the target wind speed;
judging whether the rotating speed of the fan (8) reaches the required air quantity or not when the rotating speed is maximum;
when the required air volume is not reached, reversely deducing the target sheet distance according to the maximum rotating speed;
and adjusting the plate pitch of the heat exchange fins (2) to a target plate pitch.
17. The control method according to claim 16, characterized by further comprising:
in the heat exchange mode, after the heat exchange fins (2) are adjusted to the target fin pitch t for time, the maximum heat exchange amount still does not reach x% of the set heat exchange amount, the unit is prompted to need to be cleaned, and the fin pitch of the heat exchange fins (2) is adjusted to the maximum;
or the like, or, alternatively,
in the air supply mode, after the heat exchange fins (2) are adjusted to the target fin pitch t, the maximum air volume does not reach x% of the set air volume, the unit is prompted to need to be cleaned, and the fin pitch of the heat exchange fins (2) is adjusted to the maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617031.8A CN114294710A (en) | 2021-12-27 | 2021-12-27 | Fin type heat exchanger, fan coil and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617031.8A CN114294710A (en) | 2021-12-27 | 2021-12-27 | Fin type heat exchanger, fan coil and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114294710A true CN114294710A (en) | 2022-04-08 |
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ID=80969107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111617031.8A Pending CN114294710A (en) | 2021-12-27 | 2021-12-27 | Fin type heat exchanger, fan coil and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114294710A (en) |
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2021
- 2021-12-27 CN CN202111617031.8A patent/CN114294710A/en active Pending
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