CN114738862B

CN114738862B - Radiation device for radiation air conditioner and working method thereof

Info

Publication number: CN114738862B
Application number: CN202110019557.XA
Authority: CN
Inventors: 柯颖; 夏登枫; 郑军妹; 戴九松; 张旭东
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2023-04-14
Anticipated expiration: 2041-01-07
Also published as: CN114738862A

Abstract

The invention relates to a radiation device for a radiation air conditioner, which comprises a shell (1) with a chamber (10) inside, a heat exchange piece (2) arranged inside the shell (1), and a radiation plate (3) connected with the shell (1) and used for radiating heat generated by the heat exchange piece (2), and is characterized in that: the radiant panel (3) is connected to the housing (1) in such a way that it can be moved relative to the housing (1) towards or away from the heat exchanger (2). The invention also discloses a working method of the radiation device. Compared with the prior art, the radiation efficiency of the radiation plate can be improved while the dewing risk of the radiation plate can be reduced.

Description

Radiation device for radiation air conditioner and working method thereof

Technical Field

The invention belongs to the technical field of radiation air conditioner tail ends, and particularly relates to a radiation device for a radiation air conditioner and a working method of the radiation device.

Background

The radiation air conditioner terminal mainly supplies cold or heat to the indoor in a radiation heat exchange mode, compared with the traditional convection air conditioner terminal such as a fan coil, the radiation air conditioner terminal has the advantages of uniform indoor air temperature distribution, no wind sensation and the like, for example, the structure disclosed in the invention patent of invention patent No. ZL201210470273.3 radiation heat exchange plate component (No. CN 103822318B) with the patent number of ZL 5363 comprises a metal radiation plate, a heat exchange component and an outer cover, a non-metal heat conduction layer is arranged between the metal radiation plate and the heat exchange component, and the upper surface and the lower surface of the non-metal heat conduction layer are respectively contacted with the heat exchange component and the metal radiation plate. Through surface heat transfer, the metal radiation plate can obtain a relatively uniform temperature field.

Because the radiation plate can only adjust the indoor temperature in a radiation heat exchange mode, the problems of limited indoor humidity, air quality, refrigerating and heating capacities and the like cannot be solved. In order to overcome the defects of the radiation plate, the prior art is mostly realized by additionally arranging a fresh air or/and a return air system, for example, a heat exchange system disclosed in patent No. ZL201410233556.5 of active radiation plate heat exchange system and heat exchange treatment method thereof (publication No. CN 103982968B) integrates radiation heat exchange and active convection heat exchange, in the process of the heat exchange treatment method, heat exchange can be carried out not only through radiation and environment, but also through a fan to actively force the convection heat exchange, heat/cool air and enlarge the temperature difference of water supply and return of the radiation plate, thereby helping to improve the heat exchange efficiency and enhancing the cold/heat supply capability of the radiation plate heat exchange system.

Also, for example, the invention patent application with application number CN201710326886.2, which is referred to as "a radiation plate of enhanced convection type capillary network and its heat exchange method" (application publication number CN106958900 a), discloses a structure including a radiation bottom plate, a cover plate, a capillary network, a return air inlet, and an air supply structure, where the air supply structure includes a plurality of air outlets uniformly distributed on the radiation bottom plate, and the capillary network is disposed in a convection cavity formed by the radiation bottom plate and the cover plate, so as to implement simultaneous radiation heat exchange and convection heat exchange.

However, under the refrigeration condition, because the temperature of the radiation plate is lower, and when the temperature of the radiation plate is lower than the dew point temperature of air, the surface of the radiation plate can generate the phenomenon of dewing, and the condensed water can influence the use. And when the equipment just starts to operate, the radiant quantity and the radiant efficiency of the radiant panel are lower.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a radiation device for a radiation air conditioner, which can reduce the dew condensation risk of a radiation plate, aiming at the current state of the prior art.

A second technical problem to be solved by the present invention is to provide a radiation device for a radiation air conditioner, which can improve radiation efficiency of a radiation plate.

A third technical problem to be solved by the present invention is to provide a radiation device for a radiation air conditioner, which can drive a radiation plate to move without additionally providing a driving structure.

The fourth technical problem to be solved by the present invention is to provide a working method of the above radiation device.

The technical scheme adopted by the invention for solving the first and second technical problems is as follows: the utility model provides a radiation device for radiating air conditioner, includes that inside has the casing of cavity, locates the inside heat transfer piece of casing, links to each other with the casing in order to radiate out the radiant panel of the heat that the heat transfer piece produced, its characterized in that: the radiant panel is movably connected to the housing toward and away from the heat exchange member. The radiation plate and the shell can be connected in a front-back distribution mode or in an up-down distribution mode, and the radiation plate and the shell are specifically designed according to the actual design. Other structures of the radiation air conditioner are the same as those of the prior art.

To further solve the third technical problem, it is preferable that the air conditioner further comprises an air duct communicating with the chamber and a fan acting on the air duct to blow or suck the air flow into or out of the chamber; the front side opening of casing, the radiation plate is vertical setting at the front side of casing and closed above-mentioned opening basically, is equipped with the air outlet on the radiation plate and opens and close the air door of air outlet, the interior atmospheric pressure of cavity is greater than the outer atmospheric pressure of cavity under the state that the air door is closed and the air current blows in, the interior atmospheric pressure of cavity is less than the outer atmospheric pressure of cavity under the state of air door closure and air current suction, the relative casing back-and-forth movement under the pressure differential effect of radiation plate between the atmospheric pressure of cavity. Therefore, the position of the radiation plate can be controlled by controlling the opening and closing of the air door and the forward and reverse rotation of the fan, when the radiation device starts to perform refrigeration work, the air door is closed, the fan sucks air flow, the cavity is in negative pressure, the radiation plate moves close to the heat exchange piece, the temperature of the radiation plate can be rapidly reduced, and the radiation quantity and the radiation efficiency of the radiation plate are increased; when the temperature of radiation plate is less than air dew point temperature, the air door is closed and the fan blows in the air current, makes the atmospheric pressure in the cavity be higher than atmospheric pressure, and the radiation plate is kept away from heat transfer piece and is removed, and then improves the temperature of radiation plate, and after the temperature of radiation plate is higher than air dew point temperature, the air door was opened and the fan blows in the air current and is in normal operating condition. During heating, the temperature of the radiation plate can be controlled by the movement of the radiation plate. And the setting of wind channel, fan, air outlet and air door still makes the radiation device of this application have the function of convection heat transfer, further promotes refrigeration/heating efficiency. The air duct can be used for conveying fresh air and/or return air.

Further, the casing is connected with the radiation plate through an annular sealing element, a first end of the sealing element is connected with the periphery of the radiation plate, a second end of the sealing element is connected with the front side end face of the casing, and the first end and the second end of the sealing element can be close to or far away from each other under the action of external force.

Further, a guide piece used for limiting the moving direction of the radiation plate is arranged between the shell and the radiation plate.

Furthermore, the guiding elements are at least two groups and are respectively arranged at the upper part and the lower part of the shell and the radiation plate.

Preferably, the guide part comprises a sliding block and a substantially horizontal guide post, first ends of the sliding block and the guide post are respectively and alternatively arranged on the radiation plate and the shell, the sliding block is provided with a through hole, and a second end of the guide post is inserted into the through hole and can move and stretch relative to the through hole. The slider can only move along the guide post, thereby limiting the moving direction of the radiation plate.

Preferably, the guide post is provided with a limit ring for limiting the moving distance of the sliding block.

The radiation plate is provided with a sensor for detecting the temperature and/or the humidity of the radiation plate, and the radiation plate further comprises a controller for receiving a signal sent by the sensor to control the fan and the air door to work.

In each scheme, at least two groups of air outlets and air doors thereof are arranged on the upper part and the lower part of the radiation plate respectively. Thus, cold air is blown out from the upper air outlet during cold supply, and hot air is blown out from the lower air outlet during heat supply.

Furthermore, an air outlet pipeline of the air duct is branched into at least two paths which are respectively arranged at the upper part and the lower part in the cavity; and each air outlet pipeline is respectively provided with a valve body for controlling the on-off of the pipeline.

In order to suck indoor air, furthermore, the air outlet end of each air outlet pipeline is respectively provided with an injection nozzle, and each injection nozzle is arranged in the cavity and close to the corresponding air outlet.

Furthermore, each injection nozzle comprises a first nozzle and a second nozzle, the longitudinal sections of the first nozzle and the second nozzle are trapezoidal, the big end of the second nozzle is sleeved on the small end of the first nozzle, and the big end of the first nozzle is communicated with the air outlet end of the air outlet pipeline. After the air in the air outlet pipeline is sprayed out from the first nozzle, the jet flow is blocked by the second nozzle, and a negative pressure area is formed in the gap between the two nozzles, so that nearby indoor air can be continuously sucked from the close air outlet, and the air can be mixed with the air flow sprayed out from the nozzles and then sprayed out from the second nozzle.

The radiation plate can be moved by additionally arranging a driving mechanism, and preferably, the radiation plate further comprises a driving mechanism connected with the shell, and an output end of the driving mechanism is connected with the radiation plate to drive the radiation plate to move.

Preferably, the driving mechanism includes a motor connected to the housing, a gear connected to an output shaft of the motor, and a rack connected to the radiant panel and engaged with the gear, the rack extending along a moving direction of the radiant panel.

In each of the above solutions, the heat exchange member is preferably a heat exchange tube, and a water inlet and a water outlet of the heat exchange tube extend out of the casing.

The bottom of the shell is connected with a drain pipe for discharging condensed water, and a drain valve is arranged on the drain pipe; the bottom wall of the shell is of a structure which is inclined downwards towards the drain pipe. So that the condensed water flows to the position of the drain pipe.

The technical scheme adopted by the invention for solving the fourth technical problem is as follows: a method of operating a radiation device as described above, characterized by:

when the surface temperature of the radiation plate is lower than the dew point temperature of air, the air outlet of the radiation plate is closed, the fan rotates forwards, so that the air pressure in the cavity is higher than the atmospheric pressure, the radiation plate moves outwards in the direction away from the heat exchange piece, and then the air outlet is opened; after the air outlet is opened, if the surface temperature of the radiating plate is still lower than the dew point temperature of air, the temperature of the heat exchange piece is increased;

when the surface temperature of the radiation plate is higher than the dew point temperature of air by 2 ℃ or above, the air outlet of the radiation plate is closed, the fan is reversely rotated, so that the air pressure in the cavity is lower than the atmospheric pressure, and the radiation plate moves inwards towards the direction close to the heat exchange piece under the action of pressure difference.

Compared with the prior art, the invention has the advantages that: through linking to each other the mode that can remove casing relatively with the radiant panel with the casing, and be close to or keep away from heat exchange piece, and then can adjust the distance between radiant panel and the heat exchange piece according to the face temperature and the indoor air dew point temperature of radiant panel, can also let the radiant panel be close to heat exchange piece as far as possible when effectively guaranteeing the radiant panel surface not dewfall, and then improve radiation efficiency, more be favorable to improving and use the travelling comfort.

Drawings

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

FIG. 2 is a side view of a first embodiment of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a diagram illustrating a state of refrigeration operation according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a state of use during heating according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 8 is a schematic structural diagram according to a second embodiment of the present invention;

FIG. 9 is an exploded perspective view of a third embodiment of the present invention;

FIG. 10 is an enlarged view of section C of FIG. 9;

FIG. 11 is an enlarged view of portion D of FIG. 9;

FIG. 12 is an enlarged view of section E of FIG. 9;

FIG. 13 is an enlarged view of portion F of FIG. 9;

FIG. 14 is an enlarged view of portion G of FIG. 9;

FIG. 15 is a schematic view of a third embodiment of a guide member according to the present invention;

FIG. 16 is a sectional view of a third embodiment of the present invention;

fig. 17 is an enlarged view of a portion M in fig. 16.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The first embodiment is as follows:

as shown in fig. 1 to 7, a first preferred embodiment of a radiation device for a radiation air conditioner according to the present invention includes a housing 1, a heat exchange member 2, a radiation plate 3, an air duct 4, a fan, a driving mechanism 6, a sensor, and a controller.

Wherein, the housing 1 has a chamber 10 therein, and the housing 1 is open at the front side. The 1 diapire of casing is the slope structure of downward sloping, and the slope is 3 permillage, and the low department of 1 diapire of casing is connected with and supplies condensate water exhaust's drain pipe 11, is equipped with drain valve 12 on the drain pipe 11. The chamber can also be provided with an anion generator, an air humidifier and the like.

The heat exchange piece 2 is vertically arranged in the cavity 10, the heat exchange piece 2 is formed by arranging and connecting a plurality of capillary heat exchange tubes and is opposite to the front side of the shell 1, and a water inlet pipe 21 and a water outlet pipe 22 which are connected with the heat exchange piece 2 extend out of the shell 1. The water inlet pipe and the water outlet pipe outside the shell can be connected with an air conditioner external unit.

The radiation plate 3 is vertically arranged at the front side of the shell 1 to radiate out heat generated by the heat exchange piece 2, and the radiation plate 3 is connected with the shell 1 in a manner of moving relative to the shell 1 and is close to or far away from the heat exchange piece 2. The radiation plate 3 of the present embodiment is driven by the above-mentioned driving mechanism 6, and the driving mechanism 6 includes a motor 61 connected to the housing 1, a gear 62 connected to an output shaft of the motor 61, and a rack 63 connected to the radiation plate 3 and engaged with the gear 62, the rack 63 extending in the front-rear direction. And the radiation plate 3 can be driven to move back and forth by controlling the forward and reverse rotation of the motor 61. The radiation plate 3 is covered on the front side of the shell 1 in the embodiment, the radiation plate 3 is provided with a radiation wall 31 extending vertically and a connecting wall 32 extending transversely and connected with the periphery of the radiation wall 31, the connecting wall 32 is positioned on the periphery of the front side of the shell 1 and is contacted with the periphery wall of the front side of the shell 1, and when the radiation plate 3 moves, the connecting wall 32 of the radiation plate 3 moves relative to the periphery wall of the front side of the shell 1 and is always contacted with the periphery wall of the front side of the shell. The rack 63 is provided on the connecting wall 32 of the radiation plate 3. In order to drive the radiation plate 3 to move stably, two sets of driving mechanisms 6 are provided and are respectively arranged at the top and the bottom of the radiation device. The drive mechanism 6 can drive the radiation plate 3 to move closer to or away from the heat exchanging element 2. Please refer to fig. 7.

Meanwhile, two sets of air outlets 33 and air doors 34 for opening and closing the air outlets 33 are arranged on the radiation plate 3, and each set of air outlets 33 and the air doors 34 are respectively arranged on the upper portion and the lower portion of the radiation plate 3. The air door 34 can be selected from structures such as a louver, and the air door 34 can be opened and closed through a driving motor, a transmission structure and the like.

The air outlet pipe 41 of the air duct 4 is branched into two paths and respectively arranged at the upper part and the lower part in the chamber 10; each air outlet pipeline 41 is respectively provided with a valve body 42 for controlling the connection and disconnection of the pipelines; the outlet air end of the outlet duct 41 located at the upper part of the chamber 10 has at least two outlet air ends arranged at intervals along the horizontal direction, each outlet air end has an opening facing downward and is respectively provided with an injection nozzle, the injection nozzle comprises a first nozzle 43 and a second nozzle 44, the longitudinal sections of which are trapezoidal, the first nozzle 43 and the second nozzle 44 are distributed one above the other, the big end of the second nozzle 44 is sleeved on the small end of the first nozzle 43, and the big end of the first nozzle 43 is communicated with the outlet air end of the outlet duct 41. The air outlet end of the air outlet pipeline 41 positioned at the lower part of the cavity 10 is opposite to the air outlet end of the air outlet pipeline 41 positioned at the upper part of the cavity 10, and the air outlet end of the air outlet pipeline 41 positioned at the lower part of the cavity 10 is also provided with the injection nozzle. Each of the plurality of induction nozzles is disposed near the corresponding air outlet 33 to induce indoor air from the air outlet 33. The air inlet pipe 45 of the air duct 4 extends out of the chamber 10, and the water inlet pipe 21 and the water outlet pipe 22 of the heat exchange member 2 can be accommodated in the air inlet pipe 45, so as to reduce the number of openings for installing the pipes during installation.

The fan acts on the air duct 4 to blow or suck an air flow into or out of the chamber 10 through the air duct 4. (the blower is not shown in the figure, the existing blower structure can be referred to, and the blower can be installed at the inlet and outlet of the air duct 4 or in the air duct 4, and is designed according to the actual working condition, preferably arranged outdoors to reduce the indoor noise.)

On radiant panel 3 was located to above-mentioned sensor for detect 3 temperatures of radiant panel and 3 surface air temperature of radiant panel and 3 surface air humidity of radiant panel, the input of above-mentioned controller links to each other with the sensor, is used for receiving the signal that the sensor sent, and the output of controller links to each other with driving motor on fan and the air door 34, in order to control fan and air door 34 work, also the intaking of simultaneous control heat transfer piece 2, and then the temperature of control heat transfer piece 2. The sensors and controllers may be designed according to the prior art and are not shown.

The radiation device of this embodiment can realize cooling and heat supply, and the air-out pipeline air-out that is located the cavity lower part during the cooling blows cold wind up, draws indoor air from the lower part air outlet simultaneously to discharge from the upper portion air outlet, see figure 5 specifically. During heat supply, air is discharged from an air outlet pipeline positioned at the upper part of the cavity, hot air is blown downwards, indoor air is injected from an air outlet at the upper part and is discharged from an air outlet at the lower part, and the specific figure is shown in fig. 6.

Example two:

as shown in fig. 8, a second preferred embodiment of the radiation device for radiation air conditioner of the present invention is substantially the same as the radiation device of the first embodiment, except that in the present embodiment, the radiation plate 3 is connected to the housing 1 through an annular sealing member 5, a first end of the sealing member 5 is connected to a peripheral edge of the radiation plate 3, a second end of the sealing member is connected to a front end surface of the housing 1, and the sealing member 5 can be deformed to a certain extent by an external force, so that the first end and the second end of the sealing member 5 can move toward or away from each other by the external force. And the cross section of the sealing element 5 is wavy or zigzag when the sealing element is close to the sealing element, so that water cannot be accumulated on the sealing element 5. The driving mechanism 6 of the present embodiment is disposed outside the radiation device, and the specific structure of the driving mechanism 6 is the same as that of the driving mechanism 6 of the first embodiment, so as to drive the radiation plate 3 to move forward and backward, and the condensed water in the chamber 10 will not leak during the moving process. The drive mechanism 6 can also serve to support the weight of the radiation plate 3.

Example three:

as shown in fig. 9 to 17, a third preferred embodiment of the radiation device for a radiation air conditioner of the present invention is substantially the same as the radiation device of the second embodiment, except that the driving device is not provided in the present embodiment, and the radiation plate 3 is driven to move by changing the air pressure in the chamber 10, specifically: the air pressure in the chamber 10 is greater than the atmospheric pressure outside the chamber 10 in the state that the air outlet 33 is closed and the air flow is blown in, the air pressure in the chamber 10 is less than the atmospheric pressure outside the chamber 10 in the state that the air outlet 33 is closed and the air flow is sucked out, and the radiation plate 3 moves back and forth relative to the housing 1 under the action of the pressure difference between the air pressure in the chamber 10 and the atmospheric pressure. The blowing-in and sucking-out of the air flow can be realized by the positive and negative rotation of the motor.

As shown in fig. 14, 15 and 17, in order to ensure the moving stability of the radiation plate 3, a guide 7 for defining the moving direction of the radiation plate 3 is provided between the housing 1 and the radiation plate 3. The guide members 7 are provided in two sets and are respectively provided at upper and lower portions of the housing 1 and the radiation plate 3. Each set of guiding elements 7 comprises a sliding block 71 and a substantially horizontal guiding column 72, wherein first ends of the sliding block 71 and the guiding column 72 are respectively and alternatively arranged on the radiation plate 3 and the shell 1, a through hole 710 is formed in the sliding block 71, and a second end of the guiding column 72 is inserted into the through hole 710 and can move and stretch relative to the through hole 710. Meanwhile, a limiting ring 73 for limiting the moving distance of the sliding block 71 is arranged on the guide column 72. The above-mentioned guide 7 can at the same time play a role in supporting the weight of the radiation plate 3.

Meanwhile, the cross section of the annular sealing member 5 in this embodiment is a concave U-shaped structure, see fig. 17 in particular, so that water can be prevented from accumulating on the sealing member 5.

The sensor on the radiant panel 3 detects the surface temperature of the radiant panel 3 and the temperature and humidity of the surface air automatically at regular intervals, and transmits signals to the controller, and the controller controls the surface temperature of the radiant panel 3 to be higher than the dew point temperature of the surface air by controlling the forward and reverse rotation of the fan, the water inflow of the heat exchange part 2, the opening and closing of the air door 34 and the like. The method comprises the following specific steps: when the surface temperature of the radiation plate 3 is detected to be lower than the dew point temperature of the surface air by 1 ℃, the upper air outlet and the lower air outlet of the radiation plate 3 are closed, the fan continues to operate, the air pressure in the cavity 10 is higher than the atmospheric pressure, the radiation plate 3 translates to the limit towards the direction which is vertically far away from the heat exchange piece 2, and then the upper air outlet and the lower air outlet are opened. And after the temperature is stabilized, detecting the surface temperature of the radiation plate 3 and the indoor temperature and humidity again, and if the surface temperature of the radiation plate 3 is higher than the dew point temperature, continuing stable operation of the system. If the surface temperature of the radiant panel 3 is still lower than the dew point temperature, the water supply flow entering the heat exchange member 2 is immediately reduced, and the average surface temperature of the heat exchange member 2 is increased, i.e. the surface temperature of the radiant panel 3 is increased. This is more rapid by directly adjusting the water supply flow or temperature than by keeping the radiant panel 3 stationary, since water has some thermal inertia and moving the radiant panel 3 can cause its temperature to increase rapidly. When detecting that the surface temperature of the radiation plate 3 is higher than the dew point temperature of air by 2 ℃, the upper air outlet and the lower air outlet of the radiation plate 3 are closed, the fan is reversely rotated, the pressure in the cavity 10 is lower than the atmospheric pressure, the radiation plate 3 is closer to the heat exchange piece 2 under the action of the pressure difference, the surface temperature of the radiation plate 3 is rapidly reduced, and the proportion of radiation heat exchange is increased.

Claims

1. The utility model provides a radiation device for radiating air conditioner, includes that inside has casing (1) of cavity (10), locates inside heat transfer spare (2) of casing (1), links to each other with casing (1) in order to radiate out radiant panel (3) with the heat that heat transfer spare (2) produced, its characterized in that: the radiation plate (3) is connected with the shell (1) in a manner of moving relative to the shell (1) and is close to or far away from the heat exchange piece (2);

the air-conditioning system also comprises an air duct (4) communicated with the chamber (10) and a fan acting on the air duct (4) to blow or suck airflow into or out of the chamber (10); the front side opening of casing (1), radiation plate (3) are vertical setting in the front side of casing (1) and closed above-mentioned opening basically, are equipped with air outlet (33) and open and close air door (34) of air outlet (33) on radiation plate (3), cavity (10) interior atmospheric pressure is greater than the outer atmospheric pressure of cavity (10) under the state that air outlet (33) are closed and the air current is insufflated, cavity (10) interior atmospheric pressure is less than the outer atmospheric pressure of cavity (10) under the state of air outlet (33) closure and air current suction, relative casing (1) back-and-forth movement under the pressure differential effect between cavity (10) interior atmospheric pressure and atmospheric pressure of radiation plate (3).

2. The radiating device according to claim 1, wherein: the shell (1) is connected with the radiation plate (3) through an annular sealing piece (5), a first end of the sealing piece (5) is connected with the periphery of the radiation plate (3), a second end of the sealing piece is connected with the front side end face of the shell (1), and the first end and the second end of the sealing piece (5) can be close to or far away from each other under the action of external force.

3. The radiating device according to claim 1, wherein: a guide piece (7) used for limiting the moving direction of the radiation plate (3) is arranged between the shell (1) and the radiation plate (3).

4. The radiating device according to claim 3, characterized in that: the guide pieces (7) are at least two groups and are respectively arranged at the upper part and the lower part of the shell (1) and the radiation plate (3).

5. The radiating device according to claim 3, characterized in that: the guide piece (7) comprises a sliding block (71) and a substantially horizontal guide column (72), first ends of the sliding block (71) and the guide column (72) are respectively and alternatively arranged on the radiation plate (3) and the shell (1), the sliding block (71) is provided with a through hole (710), and a second end of the guide column (72) is inserted into the through hole (710) and can move and stretch relative to the through hole (710).

6. The radiating device according to claim 5, wherein: and a limiting ring (73) for limiting the moving distance of the sliding block (71) is arranged on the guide post (72).

7. The irradiation device of claim 1, wherein: the radiation plate (3) is provided with a sensor for detecting the temperature of the radiation plate (3) and/or the surface air humidity of the radiation plate (3), and the radiation plate further comprises a controller for receiving a signal sent by the sensor to control the fan and the air door (34) to work.

8. The irradiation device as set forth in any one of claims 1 to 7, wherein: the air outlets (33) and the air doors (34) thereof are at least two groups and are respectively arranged at the upper part and the lower part of the radiation plate (3).

9. The radiating device according to claim 8, wherein: an air outlet pipeline (41) of the air duct (4) is branched into at least two paths and is respectively arranged at the upper part and the lower part in the cavity (10); and each air outlet pipeline (41) is respectively provided with a valve body (42) for controlling the on-off of the pipeline.

10. The irradiation device of claim 9, wherein: the air outlet end of each air outlet pipeline (41) is respectively provided with an injection nozzle, and each injection nozzle is arranged in the cavity (10) and close to the corresponding air outlet (33).

11. The irradiation device of claim 10, wherein: each injection nozzle comprises a first nozzle (43) and a second nozzle (44) with trapezoidal longitudinal sections, the large head end of the second nozzle (44) is sleeved on the small head end of the first nozzle (43), and the large head end of the first nozzle (43) is communicated with the air outlet end of the air outlet pipeline (41).

12. The radiating device according to claim 1, wherein: the radiation plate is characterized by further comprising a driving mechanism (6) connected with the shell (1), wherein the output end of the driving mechanism (6) is connected with the radiation plate (3) to drive the radiation plate (3) to move.

13. The radiating device according to claim 12, wherein: the driving mechanism (6) comprises a motor (61) connected to the shell (1), a gear (62) connected with an output shaft of the motor (61), and a rack (63) connected to the radiant panel (3) and matched with the gear (62), wherein the rack (63) extends along the moving direction of the radiant panel (3).

14. The irradiation device as set forth in any one of claims 1 to 7, wherein: the heat exchange piece (2) is a heat exchange tube, and a water inlet and a water outlet of the heat exchange tube extend out of the shell (1).

15. The irradiation device as set forth in any one of claims 1 to 7, wherein: the bottom wall of the shell (1) is connected with a drain pipe (11) for discharging condensed water, and a drain valve (12) is arranged on the drain pipe (11); the bottom wall of the shell (1) is of a structure which inclines downwards towards the drain pipe (11).

16. A method of operating a radiation device according to any one of claims 1 to 11, characterized in that:

when the surface temperature of the radiation plate (3) is lower than the dew point temperature of air, an air outlet (33) of the radiation plate (3) is closed, the fan rotates forwards, so that the air pressure in the cavity (10) is higher than the atmospheric pressure, the radiation plate (3) moves outwards in the direction away from the heat exchange piece (2), and then the air outlet (33) is opened; after the air outlet (33) is opened, if the surface temperature of the radiation plate (3) is still lower than the dew point temperature of air, the temperature of the heat exchange piece (2) is increased;

when the surface temperature of the radiation plate (3) is higher than the dew point temperature of air by 2 ℃ or above, the air outlet (33) of the radiation plate (3) is closed, the fan is reversed, so that the air pressure in the cavity (10) is lower than the atmospheric pressure, and the radiation plate (3) moves inwards towards the direction close to the heat exchange piece (2) under the action of the pressure difference.