CN111536596A

CN111536596A - Fan coil heat exchanger

Info

Publication number: CN111536596A
Application number: CN202010388111.XA
Authority: CN
Inventors: 梁涛; 黄广顺
Original assignee: Chuzhou Shengwei Electric Power Information Consulting Co ltd
Current assignee: Chuzhou Shengwei Electric Power Information Consulting Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-08-14

Abstract

The invention belongs to the technical field of heat exchangers, and particularly relates to a fan coil heat exchanger which comprises a shell, a heat exchanger body, a filter disc, a drain pipe, a coil water outlet pipe, a sound absorption pad, a fan body and a controller, wherein the shell is provided with a water inlet pipe and a water outlet pipe; a heat exchanger body is arranged in the shell, a coil water inlet pipe is arranged at the upper end of the heat exchanger body, a coil water outlet pipe is arranged at the lower end of the heat exchanger body, and a filter disc is arranged above the coil water outlet pipe; the multi-row coil pipe penetrates through a plurality of fin structures with different heights side by side, the heat exchange efficiency can be accelerated due to the arrangement of the multi-row coil pipe, the fins with different heights can enable condensed water to flow into the water accumulating tank from a first fin with a higher bottom end to a fourth fin with a lower bottom end step by step, the flow speed is delayed, the heat exchanger body is prevented from being damaged due to excessive water accumulation, the filter disc can filter impurities in the condensed water, and the situation that the drain pipe is blocked due to dirt accumulation is prevented.

Description

Fan coil heat exchanger

Technical Field

The invention belongs to the technical field of heat exchangers, and particularly relates to a fan coil heat exchanger.

Background

A fan-coil unit is called a fan coil for short. It is one of the end devices of air conditioning system composed of small fan, motor and coil pipe (air heat exchanger). When chilled water or hot water flows through the coil pipes, heat is exchanged with air outside the pipes, so that the air is cooled, dehumidified or heated to adjust indoor air parameters. It is a common cold and heat supply end device. The structure form can be divided into: vertical, horizontal, wall-mounted, clamped, etc., wherein the vertical is a discrete column and a low type; the mounting mode can be divided into open installation and concealed installation; according to the water inlet direction, the water inlet direction is divided into a left type and a right type.

Traditional fan coil heat exchanger all is the single-row coil who adopts on the market now, this kind of structure heat exchange efficiency is low, fan coil heat exchanger's fan device can produce the noise at the during operation, do not set up noise control device and will produce noise pollution, the heat exchanger during operation can produce the condensation water, and condensation water is gathered when gathering because do not take the delay measure and can cause to gather at the excessive speed, produce ponding easily, ponding is gathered too high and can be leaded to the heat exchanger to damage and influence heat exchange efficiency.

Disclosure of Invention

The invention provides a fan coil heat exchanger, which aims to make up for the defects of the prior art and solve the problems that the heat exchange efficiency is low, a fan device of the fan coil heat exchanger generates noise when working, condensed water can be generated when the heat exchanger works, the condensed water is accumulated too fast because no delay measure is taken when the condensed water is accumulated, accumulated water is easy to generate, and the heat exchanger is damaged due to the fact that the accumulated water is accumulated too high, so that the heat exchange efficiency is influenced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the fan coil heat exchanger comprises a shell, a heat exchanger body, a filter disc, a drain pipe, a coil water outlet pipe, a sound absorption pad, a fan body and a controller, wherein the controller is used for controlling the fan body to start and stop; the fan comprises a shell, a heat exchanger body, a water outlet pipe, a water inlet valve, a water outlet valve, a sound absorption pad and a fan body, wherein the heat exchanger body is arranged in the shell, the water outlet pipe is arranged at the bottom end of the outer part of the shell, the water outlet valve is arranged on one side of the water outlet pipe, the coil pipe water inlet pipe is arranged at the upper end of the heat exchanger body, the coil pipe water outlet pipe is arranged at the lower end of the heat exchanger body, the water inlet valve is arranged on one side of the coil pipe water inlet pipe, the water; a filter disc is arranged above the water outlet pipe of the coil pipe and fixedly connected with the shell and the side wall of the sound absorption pad; the surface of the filter disc is provided with a plurality of filter holes; the inner wall of the bottom of the shell is fixedly connected with a guide plate; the guide plate can guide the water passing through the filter disc into the drainage pipe; the side wall of the shell is provided with an air outlet and a cleaning port, the air outlet is positioned between the connecting positions of the filter disc and the guide plate with the shell, the cleaning port is positioned above the connecting point of the filter disc and the shell, and a rubber plug is arranged at the cleaning port; the top of the shell is provided with air outlet holes which are uniformly distributed; the air outlet is communicated to an air outlet of the fan body through an air groove and a hose which are formed in the top of the shell;

the heat exchanger body comprises a coil pipe, a first fin, a second fin, a third fin and a fourth fin, wherein the third fin is arranged on one side of the fourth fin, the second fin is arranged on one side, far away from the fourth fin, of the third fin, the first fin is arranged on one side, far away from the third fin, of the second fin, and the coil pipe is arranged inside the first fin; when in work, the fan body is opened to enable the air to flow to the air outlet holes through the hose and be sprayed out, and the air sprayed out of the air outlet holes is blown to the surface of the heat exchanger body from top to bottom, because the coil pipes are arranged into a plurality of rows, the air area contacted with the heat exchanger body is larger, the heat exchange efficiency is improved, then the air contacts the coil pipe to generate condensed water, flows to the bottom of the device and is discharged through the drain pipe, the air temperature rises or falls to reach the required temperature after contacting the coil pipe to generate a cold and hot effect, and then is discharged from the air outlet to achieve the purpose of heat exchange, the gas sprayed from top to bottom can accelerate the falling of the condensed water, improve the heat exchange rate, meanwhile, the filter disc can filter out impurities in the condensed water, prevent the condition that the drain pipe is blocked due to the accumulation of dirt, and in addition, the sound absorption pad arranged around the fan body can isolate the sound emitted by the fan body during working, so that noise pollution is avoided.

Preferably, the middle part of the filter disc is convexly designed into an arc shape, the filter disc is made of elastic rubber materials, and first springs which are uniformly arranged are fixedly connected between the filter disc and the guide plate; the during operation, the condensation water drips when falling on the filter disc, because the filter disc vibration is made to the first spring of cooperation by filter disc elastic rubber material, and the upwards protruding design in filter disc middle part, can make filter disc surface impurity shake off to the both sides of filter disc, thereby prevent that the more filtration pore that leads to the filter disc of filter disc surface impurity accumulation from blockking up, thereby effectively reduce the clean frequency of filter disc, the venthole is given vent to anger simultaneously, make the air current pass the filtration pore of filtering of filter disc, thereby improve the vibration frequency and the range of filter disc, further improve the filter disc surface impurity shake-off speed, can extract the rubber buffer of clearance department simultaneously, through the impurity of clearance mouth clearance filter disc both sides accumulation, and is simple and convenient to use.

Preferably, the lower surface of the middle part of the filter disc is fixedly connected with an auxiliary disc through second springs which are uniformly arranged; the middle part of the auxiliary disc is rotatably connected with an auxiliary rod; the lower end of the auxiliary rod is rotatably connected with an impeller; the filtering holes on the surface of the filtering disc are all designed to be inclined towards the impeller direction; when the device works, after air flows pass through the filtering holes on the filtering disc by the air injection of the air outlet holes, the air flows blow the impeller by the inclined design of the filtering holes, so that the impeller rotates, meanwhile, the auxiliary disc is fixedly connected to the lower surface of the filtering disc by the second spring to enable the impeller to move downwards, the fan body is started in the process of heat exchange of water in the coil pipe by the heat exchanger, the fan body is stopped when the heat exchanger does not heat exchange water in the coil pipe, the air outlet holes intermittently inject air in the process of stopping and starting the fan body in a reciprocating manner, so that the air flows intermittently blow the impeller, the impeller drives the auxiliary disc and the auxiliary rod to intermittently shake and simultaneously rotates, the filtering disc is driven to shake in the process of rotation and shaking of the impeller, the vibration amplitude and frequency of the filtering disc are further improved, the filtering effect of impurities is further improved, and the impurities are further promoted to move to the two sides, the cleaning frequency of the filter disc is reduced.

Preferably, the upper end of the auxiliary rod penetrates through the auxiliary disc, the upper end of the auxiliary rod is fixedly connected with an impact ball, and the impact ball is in contact with the lower surface of the filter disc in an initial state; the diameter of the striking ball is larger than that of the auxiliary rod; during operation, the impeller shakes the in-process and drives the auxiliary rod shake to through striking ball intermittent type nature striking filter disc lower surface, thereby further improve the vibration range and the frequency of filter disc, improve the filter effect, prevent that the filtration pore from blockking up.

Preferably, the middle part of the lower surface of the filter disc is fixedly connected with an air bag; the air bags and the impact balls are arranged correspondingly; the side surface of one side of each filtering hole close to the air bag is provided with an auxiliary hole; the auxiliary holes are communicated with the air bag, and a one-way valve is arranged in each auxiliary hole; each auxiliary hole is designed to be inclined upwards; during operation, the impact ball shakes the intermittent extrusion in-process and relaxs the gasbag, receives the extrusion in-process at the gasbag, and gas is through a plurality of auxiliary holes blowout in the gasbag, further prevents to filter the hole and blocks up, improves the filter effect.

Preferably, the coil pipe penetrates through the first fin, the second fin, the third fin and the fourth fin to form a surrounding disc-shaped structure, the top ends of the first fin, the second fin, the third fin and the fourth fin are at the same level, and the heights of the bottom ends of the first fin, the second fin, the third fin and the fourth fin from the ground are gradually reduced; during operation, because first fin, second fin, third fin and fourth fin reduce the range according to the height successive layer on bottom distance ground, the condensation water just one-level gradually flows to the lower fourth fin of bottom from the higher first fin in bottom then slowly flows into the device bottom of one-level, can delay the condensation water velocity of flow like this, avoids ponding suddenly too much to submerge the heat exchanger body and cause its damage.

The invention has the following beneficial effects:

1. according to the fan coil heat exchanger, the filter disc is made of the elastic rubber material of the filter disc and matched with the first spring to vibrate, the middle part of the filter disc is designed to be convex upwards, impurities on the surface of the filter disc can be shaken off to two sides of the filter disc, so that the filter holes of the filter disc are prevented from being blocked due to the fact that more impurities are accumulated on the surface of the filter disc, the cleaning frequency of the filter disc is effectively reduced, meanwhile, the air outlet holes are used for exhausting air flow to penetrate through the filter holes of the filter disc, the vibration frequency and amplitude of the filter disc are improved, the impurity shaking-off speed of the surface of the filter disc is further improved, meanwhile, the rubber plug at the cleaning opening can be pulled out, the impurities accumulated on two sides of the filter disc are cleaned through the.

2. According to the fan coil heat exchanger, air is intermittently sprayed through the air outlet holes, so that air flow intermittently blows the impeller, the impeller drives the auxiliary disc and the auxiliary rod to intermittently shake and simultaneously rotates, the filter disc is driven to shake in the rotation and shaking processes of the impeller, the vibration amplitude and frequency of the filter disc are further improved, the filtering effect of impurities is further improved, the impurities are further promoted to move to the two sides of the filter disc, and the cleaning frequency of the filter disc is reduced.

3. According to the fan coil heat exchanger, the air bag is intermittently extruded and loosened in the process of shaking by the impact ball, and in the process of extruding the air bag, air in the air bag is sprayed out through the auxiliary holes, so that the filtering holes are further prevented from being blocked, and the filtering effect is improved.

4. According to the fan coil heat exchanger, the heat exchange efficiency can be improved through the arrangement of the plurality of rows of coils, the fins with different heights can enable condensed water to gradually flow from the first fin with the higher bottom end to the fourth fin with the lower bottom end in a first-stage and first-stage mode and then slowly flow into the water accumulation groove, the water flow speed is delayed, the phenomenon that the heat exchanger body is suddenly and excessively submerged by the accumulated water to cause damage is avoided, the filtering disc arranged at the bottom of the device can filter impurities in the condensed water, the situation that the drain pipe is blocked due to accumulation of dirt is prevented, and in addition, the sound absorption pad arranged around the fan body can isolate sound and avoid noise pollution.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a front view of the present invention;

FIG. 2 is a side view of the inside of the housing of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

in the figure: the air conditioner comprises a shell 1, a heat exchanger body 2, a coil 21, a first fin 22, a second fin 23, a third fin 24, a fourth fin 25, an air outlet 3, an air outlet hole 31, a filter disc 4, a first spring 41, an auxiliary disc 42, an auxiliary rod 43, an impeller 44, an impact ball 45, an air bag 46, an auxiliary hole 47, a filter hole 5, a drain pipe 6, a cleaning port 7, a coil water outlet pipe 8, a sound absorption pad 9, a base 10, a fan body 11, a coil water inlet pipe 12 and a guide plate 13.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 3, the fan coil heat exchanger of the present invention includes a housing 1, a heat exchanger body 2, a filter disc 4, a drain pipe 6, a coil water outlet pipe 8, a sound absorption pad 9, a fan body 11, and a controller, wherein the controller is configured to control the fan body 11 to start and stop; the heat exchanger comprises a shell 1, a heat exchanger body 2, a water discharge pipe 6, a water discharge valve, a coil pipe water inlet pipe 12, a coil pipe water outlet pipe 8, a water inlet valve, a water outlet valve, a sound absorption pad 9 and a fan body 11, wherein the heat exchanger body 2 is arranged inside the shell 1, the water discharge pipe 6 is arranged at the bottom end of the outer part of the shell 1, the water discharge valve is arranged on one side of the water discharge pipe 6, the coil pipe water inlet pipe 12 is arranged at the upper end of the heat exchanger body 2, the coil pipe water outlet pipe 8 is arranged at the lower end of the heat exchanger body 2; a filter disc 4 is arranged above the coil pipe water outlet pipe 8, and the filter disc 4 is fixedly connected with the side walls of the shell 1 and the sound absorption pad 9; the surface of the filter disc 4 is provided with a plurality of filter holes 5; a guide plate 13 is fixedly connected to the inner wall of the bottom of the shell 1; the guide plate 13 can guide the water passing through the filter disc 4 into the drain pipe 6; an air outlet 3 and a cleaning port 7 are formed in the side wall of the shell 1, the air outlet 3 is positioned between the connection positions of the filter disc 4 and the guide plate 13 with the shell 1, the cleaning port 7 is positioned above the connection point of the filter disc 4 and the shell 1, and a rubber plug is arranged at the cleaning port 7; the top of the shell 1 is provided with air outlet holes 31 which are uniformly distributed; the air outlet hole 31 is communicated to an air outlet of the fan body 11 through an air groove and a hose which are arranged at the top of the shell 1;

the heat exchanger body 2 comprises a coil 21, a first fin 22, a second fin 23, a third fin 24 and a fourth fin 25, wherein the third fin 24 is arranged on one side of the fourth fin 25, the second fin 23 is arranged on one side of the third fin 24 away from the fourth fin 25, the first fin 22 is arranged on one side of the second fin 23 away from the third fin 24, and the coil 21 is installed inside the first fin 22; when the heat exchanger works, the fan body 11 is opened to enable air to flow to the air outlet holes 31 through the hose and be sprayed out, and air sprayed out of the air outlet holes 31 is blown to the surface of the heat exchanger body 2 from top to bottom, because the coil pipes 21 are arranged into a plurality of rows, the air area contacted with the heat exchanger body 2 is larger, the heat exchange efficiency is improved, then the air is contacted with the coil pipes 21 to generate condensed water, the condensed water flows to the bottom of the heat exchanger and is discharged through the drain pipes 6, the air is contacted with the coil pipes 21 to generate a cold and heat effect, the air is heated or cooled to reach a required temperature and then is discharged from the air outlet 3 to achieve the purpose of heat exchange, the falling of the condensed water can be accelerated by the air sprayed out from top to bottom, the heat exchange rate is improved, meanwhile, impurities in the condensed water can be filtered by the filter discs 4, the condition that the drain pipes 6 are blocked due, avoiding the noise pollution.

As a specific embodiment of the invention, the middle part of the filter disc 4 is convexly designed into an arc shape, the filter disc 4 is made of elastic rubber material, and first springs 41 which are uniformly arranged are fixedly connected between the filter disc 4 and the guide plate 13; the during operation, the condensation water drips when on filter disc 4, because filter disc 4 elastic rubber material makes the vibrations of cooperation first spring 41 messenger filter disc 4, and filter disc 4 middle part upwards protruding design, can make filter disc 4 surface impurity shake off to the both sides of filter disc 4, thereby prevent that filter disc 4 surface impurity accumulation is more to lead to the filtration pore 5 of filter disc 4 to block up, thereby effectively reduce the clean frequency of filter disc 4, simultaneously the venthole 31 is given vent to anger, make the air current pass the filtration pore 5 of filter disc 4, thereby improve the vibration frequency and the range of filter disc 4, further improve filter disc 4 surface impurity shake off speed, can extract the rubber buffer of clearance mouth 7 department simultaneously, clear up the impurity of filter disc 4 both sides accumulation through clearance mouth 7, and is simple and convenient to use.

As a specific embodiment of the present invention, the lower surface of the middle part of the filter disc 4 is fixedly connected with an auxiliary disc 42 through second springs which are uniformly arranged; the middle part of the auxiliary disc 42 is rotatably connected with an auxiliary rod 43; the lower end of the auxiliary rod 43 is rotatably connected with an impeller 44; the filter holes 5 on the surface of the filter disc 4 are all designed to incline towards the direction of the impeller 44; when the device works, after air flows pass through the filtering holes 5 on the filtering disc 4 by the air injection of the air outlet holes 31, the air flows blow the impeller 44 by the inclined design of the filtering holes 5, so that the impeller 44 rotates, meanwhile, the impeller 44 moves downwards due to the fact that the auxiliary disc 42 is fixedly connected to the lower surface of the filtering disc 4 through the second spring, in the process that the heat exchanger carries out heat exchange on water in the coil 21, the fan body 11 is started, the fan body 11 stops when the heat exchanger does not carry out heat exchange on the water in the coil 21, in the reciprocating stopping and starting processes of the fan body 11, the air is intermittently injected through the air outlet holes 31, so that the air flows intermittently blow the impeller 44, the impeller 44 is driven to rotate by the impeller 44 while the auxiliary disc 42 and the auxiliary rod 43 are intermittently shaken, the filtering disc 4 is driven to shake in the rotating and shaking processes of the impeller 44, the vibration amplitude and frequency of the filtering disc 4 are further improved, and, and further promote the impurities to move to the two sides of the filter disc 4, and reduce the cleaning frequency of the filter disc 4.

As a specific embodiment of the present invention, the upper end of the auxiliary rod 43 passes through the auxiliary disc 42, the upper end of the auxiliary rod 43 is fixedly connected with the impact ball 45, and the impact ball 45 contacts the lower surface of the filter disc 4 in the initial state; the diameter of the striking ball 45 is larger than that of the auxiliary rod 43; during operation, impeller 44 shakes the in-process and drives auxiliary rod 43 and trembles to through striking ball 45 intermittent type nature striking filter disc 4 lower surface, thereby further improve filter disc 4's vibration range and frequency, improve the filter effect, prevent to filter 5 jam.

As a specific embodiment of the invention, the middle part of the lower surface of the filter disc 4 is fixedly connected with an air bag 46; the air bag 46 is arranged corresponding to the impact ball 45; an auxiliary hole 47 is formed in the side surface of one side, close to the air bag 46, of each filtering hole 5; the auxiliary holes 47 are communicated with the air bag 46, and a one-way valve is arranged in each auxiliary hole 47; each auxiliary hole 47 is designed to be inclined upwards; when the air bag filtering device works, the impact balls 45 intermittently extrude and release the air bag 46 in the shaking process, and in the extruding process of the air bag 46, gas in the air bag 46 is sprayed out through the auxiliary holes 47, so that the filtering holes 5 are further prevented from being blocked, and the filtering effect is improved.

As a specific embodiment of the present invention, the coil 21 penetrates through the first fin 22, the second fin 23, the third fin 24 and the fourth fin 25 to form a surrounding disc-shaped structure, the top ends of the first fin 22, the second fin 23, the third fin 24 and the fourth fin 25 are at the same level, and the heights of the bottom ends of the first fin 22, the second fin 23, the third fin 24 and the fourth fin 25 from the ground are gradually reduced; during operation, because first fin 22, second fin 23, third fin 24 and fourth fin 25 reduce the range according to the height successive layer on bottom distance ground, the condensation water just one-level gradually flows to the lower fourth fin 25 of bottom from the higher first fin 22 of bottom gradually of one-level follow, then slowly flows into the device bottom, can delay the condensation water velocity of flow like this, avoids ponding suddenly too much to submerge heat exchanger body 2 and cause its damage.

The specific working process is as follows:

in the process of carrying out heat exchange on water in the coil 21 by the heat exchanger, the fan body 11 is started, when the heat exchanger does not carry out heat exchange on the water in the coil 21, the fan body 11 is stopped, the fan body 11 is opened to enable air to flow to the air outlet holes 31 through the hose to be sprayed out, air sprayed out of the air outlet holes 31 is blown to the surface of the heat exchanger body 2 from top to bottom, then the air contacts with the coil 21 to generate condensed water, flows to the bottom of the device through the filter disc 4 and is discharged through the water discharge pipe 6, as the first fins 22, the second fins 23, the third fins 24 and the fourth fins 25 are arranged in a layer-by-layer manner according to the height from the bottom end to the ground, the condensed water flows from the first fins 22 with higher bottom end to the fourth fins 25 with lower end step by step and then slowly flows into the bottom of the device, so that the flow rate of the condensed water can be delayed, after the air is contacted with the coil 21 and a cold and hot effect is generated, the air temperature is increased or reduced to reach a required temperature and then the air is discharged from the air outlet 3 to achieve the purpose of heat exchange, the gas sprayed from top to bottom can accelerate the falling of condensed water, impurities in the condensed water can be filtered through the filter disc 4, when the condensed water drops on the filter disc 4, the filter disc 4 vibrates due to the matching of the elastic rubber material of the filter disc 4 and the first spring 41, and the middle part of the filter disc 4 is designed to be upwards convex, so that the impurities on the surface of the filter disc 4 can be shaken and fallen to two sides of the filter disc 4, the blockage of the filter holes 5 of the filter disc 4 caused by the accumulation of more impurities on the surface of the filter disc 4 is prevented, meanwhile, the air outlet 31 gives out air, the air flow passes through the filter holes 5 of the filter disc 4, the vibration frequency and amplitude of the filter disc 4 are improved, the rubber plug at the cleaning port 7 is pulled, after the air flow passes through the filtering holes 5 on the filtering disc 4 by the air injection of the air outlet holes 31, the air flow blows the impeller 44 by the inclined design of the filtering holes 5, so that the impeller 44 rotates, meanwhile, the auxiliary disc 42 is fixedly connected to the lower surface of the filtering disc 4 by the second spring to enable the impeller 44 to move downwards, the air outlet holes 31 intermittently inject air in the reciprocating stopping and starting processes of the fan body 11, so that the air flow intermittently blows the impeller 44, the impeller 44 rotates while the impeller 44 drives the auxiliary disc 42 and the auxiliary rod 43 to intermittently shake, the filtering disc 4 is driven to shake in the rotating and shaking processes of the impeller 44, the vibration amplitude and frequency of the filtering disc 4 are further improved, the auxiliary rod 43 is driven to shake in the shaking process of the impeller 44, and the lower surface of the filtering disc 4 is intermittently impacted by the impact balls 45, so that the vibration amplitude and frequency of the filtering disc 4 are further improved, the impact ball 45 intermittently presses and releases the air bag 46 during shaking, and the gas in the air bag 46 is ejected through the plurality of auxiliary holes 47 during the pressing of the air bag 46, thereby further preventing the filter holes 5 from being clogged.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A fan coil heat exchanger comprises a shell (1), a heat exchanger body (2), a filter disc (4), a drain pipe (6), a coil water outlet pipe (8), a sound absorption pad (9), a fan body (11) and a controller, wherein the controller is used for controlling the fan body (11) to start and stop; the method is characterized in that: the heat exchanger comprises a shell (1), a heat exchanger body (2) is arranged inside the shell (1), a drain pipe (6) is arranged at the bottom end of the outer part of the shell (1), a drain valve is arranged on one side of the drain pipe (6), a coil pipe water inlet pipe (12) is arranged at the upper end of the heat exchanger body (2), a coil pipe water outlet pipe (8) is arranged at the lower end of the heat exchanger body (2), a water inlet valve is arranged on one side of the coil pipe water inlet pipe (12), a water outlet valve is arranged on one side of the coil pipe water outlet pipe (8), a sound absorption pad (9) is installed on one side of the inner wall of the shell (1), and a fan body (11) is installed at the; a filter disc (4) is arranged above the coil pipe water outlet pipe (8), and the filter disc (4) is fixedly connected to the side walls of the shell (1) and the sound absorption pad (9); a plurality of filtering holes (5) are formed in the surface of the filtering disc (4); a guide plate (13) is fixedly connected to the inner wall of the bottom of the shell (1); the guide plate (13) can guide water passing through the filter disc (4) into the drain pipe (6); an air outlet (3) and a cleaning port (7) are formed in the side wall of the shell (1), the air outlet (3) is located between the connection positions of the filter disc (4) and the shell (1) and the guide plate (13), the cleaning port (7) is located above the connection point of the filter disc (4) and the shell (1), and a rubber plug is arranged at the cleaning port (7); the top of the shell (1) is provided with air outlet holes (31) which are uniformly distributed; the air outlet hole (31) is communicated to an air outlet of the fan body (11) through an air groove and a hose which are formed in the top of the shell (1);

the heat exchanger body (2) comprises a coil pipe (21), a first fin (22), a second fin (23), a third fin (24) and a fourth fin (25), wherein the third fin (24) is arranged on one side of the fourth fin (25), the second fin (23) is arranged on one side, away from the fourth fin (25), of the third fin (24), the first fin (22) is arranged on one side, away from the third fin (24), of the second fin (23), and the coil pipe (21) is installed inside the first fin (22).

2. A fan coil heat exchanger as set forth in claim 1, wherein: the middle part of the filter disc (4) is in an upward convex arc design, the filter disc (4) is made of elastic rubber materials, and first springs (41) which are uniformly arranged are fixedly connected between the filter disc (4) and the guide plate (13).

3. A fan coil heat exchanger as set forth in claim 2, wherein: the lower surface of the middle part of the filter disc (4) is fixedly connected with an auxiliary disc (42) through second springs which are uniformly arranged; the middle part of the auxiliary disc (42) is rotatably connected with an auxiliary rod (43); the lower end of the auxiliary rod (43) is rotatably connected with an impeller (44); the filtering holes (5) on the surface of the filtering disc (4) are all designed to incline towards the direction of the impeller (44).

4. A fan coil heat exchanger as set forth in claim 3, wherein: the upper end of the auxiliary rod (43) penetrates through the auxiliary disc (42), the upper end of the auxiliary rod (43) is fixedly connected with an impact ball (45), and the impact ball (45) is in contact with the lower surface of the filter disc (4) in an initial state; the diameter of the striking ball (45) is larger than that of the auxiliary rod (43).

5. A fan coil heat exchanger as set forth in claim 4, wherein: the middle part of the lower surface of the filter disc (4) is fixedly connected with an air bag (46); the air bag (46) is arranged corresponding to the impact ball (45); auxiliary holes (47) are formed in the side face, close to the air bag (46), of each filtering hole (5); the auxiliary holes (47) are communicated with the air bag (46), and a one-way valve is arranged in each auxiliary hole (47); each auxiliary hole (47) is designed to be inclined upwards.

6. A fan coil heat exchanger as set forth in claim 1, wherein: the coil pipe (21) penetrates through the first fin (22), the second fin (23), the third fin (24) and the fourth fin (25) to form a disc-surrounding structure, the top ends of the first fin (22), the second fin (23), the third fin (24) and the fourth fin (25) are at the same level, and the height of the bottom ends of the first fin (22), the second fin (23), the third fin (24) and the fourth fin (25) from the ground is gradually reduced.