CN111912066A - Radiant air conditioner terminal for adjusting thermal damping - Google Patents
Radiant air conditioner terminal for adjusting thermal damping Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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Abstract
The invention discloses a radiation air conditioner tail end for adjusting thermal damping, which comprises a heat exchange layer, a thermal damping layer and a radiation panel which are sequentially arranged, wherein the thermal damping layer is an air layer formed between the heat exchange layer and the radiation panel; the temperature and humidity of indoor air monitored by the temperature and humidity sensor and the water supply temperature monitored by the first temperature sensor are used for controlling the actuating mechanism to adjust the distance between the energy conversion layer and the radiation panel, namely the thickness of the thermal damping layer is adjusted, so that the temperature of the radiation panel reaches a temperature threshold value. The invention dynamically adjusts the thermal damping value of the thermal damping layer, thereby dynamically adjusting the temperature of the radiation panel, leading the temperature of the radiation panel to be close to the indoor temperature to the maximum extent, and improving the radiation heat transfer capability while controlling the radiation panel not to dewfall.
Description
Technical Field
The invention relates to the field of radiation air conditioners, in particular to a radiation air conditioner tail end for adjusting thermal damping.
Background
The radiation air conditioner terminal is used as a novel energy-saving air conditioner terminal, the application range is wide, and the project laying area is large.
In the traditional radiation air conditioner terminal, a heat transfer structural member for conveying cold water and hot water, such as an energy conversion layer consisting of a heat transfer pipeline and a heat conduction aluminum plate, is directly attached and connected with a metal radiation panel, or is attached to the metal radiation panel through a layer of silencing film with the thickness of less than 1mm, because the contact density of a coil pipe and the surface of the radiation panel is different, the radiation panel is in an area close to the heat transfer pipeline to form a low-temperature strip area, and the temperature of the low-temperature strip area is lower than that of other areas, so that the temperature of the radiation panel is uneven; when the temperature of the low-temperature areas is lower than the dew point temperature of indoor air, water vapor in the air is easy to condense and form water drops in the areas; in the operation process of the radiation air-conditioning system, the relative humidity of indoor air greatly changes along with the opening and closing conditions of indoor personnel and doors and windows, so that the dew point temperature of the indoor air is increased, and the condensation of a radiation panel occurs; the dew condensation of the radiation panel is easy to breed bacteria, and the indoor sanitary environment is damaged; in order to prevent the formation of the low temperature region, it is common practice to:
1. the water temperature of the air conditioner chilled water is increased, so that the surface temperature of the radiation panel is maintained above the dew point temperature of indoor air, for example: when the indoor dry bulb temperature is 26 ℃ and the relative humidity is 50%, the air dew point temperature is 15 ℃; when the indoor dry bulb temperature is 28 ℃ and the relative humidity is 50%, the air dew point temperature is 16.8 ℃; when the indoor dry bulb temperature is 28 ℃ and the relative humidity is 60%, the air dew point temperature is 18.8 ℃; therefore, the temperature of the panel of the radiation air-conditioning system is controlled to be more than 19.3 ℃, and the condensation phenomenon cannot be generated under most indoor operating conditions. However, since the indoor temperature and humidity are variables which change constantly, the efficiency of radiation refrigeration cannot be exerted to the maximum extent when the temperature of the board surface is fixed at a certain control point;
2. when the sensor detects that the indoor dew point temperature is 0.5-1 ℃ higher than the surface temperature of the radiation panel, the chilled water is directly cut off, namely the operation of the air conditioning system is closed, so that the air conditioning system is closed, and the use effect is influenced;
3. the fresh air is used for bearing more moisture loads in the room, so that the requirement of a fresh air processing state point is higher, and the energy consumption is 10% -35% higher than that of a conventional fresh air system.
Moreover, the existing heat transfer pipelines all adopt a series connection mode to transfer heat, and an internal fluid channel is equivalent to a series connection type long stroke, so that the heat transfer pipelines are inconvenient to install and poor in heat transfer efficiency. The heat transfer pipeline at the tail end of the radiation air conditioner is mostly provided with a U-shaped coil pipe, and the pipe is preferably of a circular pipe structure in order to facilitate the bending processing of the U-shaped coil pipe. However, the circular coil has a small contact area with the planar structure, which results in poor thermal conductivity. Therefore, the round tube is usually wrapped with the heat-conducting radiating fin, so that the production process link and the manufacturing cost are increased, and in addition, the radiating fin needs to be well attached to the round tube and also needs to ensure the flatness of the attachment of the radiating fin to the plane structure, so that the difficulty of the quality control of the production process is increased.
Therefore, how to improve the radiation heat transfer efficiency while making the surface temperature of the radiation panel uniform and controlling the radiation panel not to dew is one of the important concerns and urgent problems to be solved in the field.
Disclosure of Invention
In order to solve the problems of poor heat transfer effect, easy dewing, high installation difficulty, high energy consumption and the like of the tail end of the existing radiation air conditioner, the invention innovatively provides the tail end of the radiation air conditioner for adjusting thermal damping, the tail end of the radiation air conditioner can dynamically adjust the thermal damping value of a thermal damping layer, so that the plate surface temperature of a radiation panel is dynamically adjusted, the plate surface temperature of the radiation panel is enabled to be close to the indoor temperature to the maximum extent, the radiation heat transfer capacity is improved while the radiation panel is controlled not to dewing, the fresh air processing state point is enabled to be at the optimal energy saving point, the system energy consumption is reduced, the transduction layer conducts heat in a parallel fluid channel mode, the radiation heat is more uniform, the heat transfer efficiency is improved, and the.
In order to achieve the technical purpose, the invention discloses a radiation air conditioner tail end for adjusting thermal damping, which comprises an energy conversion layer, a thermal damping layer and a radiation panel, wherein the energy conversion layer, the thermal damping layer and the radiation panel are sequentially arranged;
the terminal regulating part that is used for adjusting of thermal damping layer thickness that still includes of radiation air conditioner, regulating part includes actuating mechanism, at least one temperature and humidity sensor, at least one first temperature sensor and at least one second temperature sensor, temperature and humidity sensor is used for monitoring the humiture of the terminal place room air of radiation air conditioner, first temperature sensor is used for monitoring the water supply temperature, second temperature sensor is used for monitoring the temperature of radiation panel, actuating mechanism is used for adjusting according to water supply temperature and room air temperature and humidity the distance between energy conversion layer and the radiation panel makes the radiation panel temperature reach the temperature threshold.
Furthermore, the adjusting component also comprises a control unit, the actuating mechanism, the temperature and humidity sensor, the first temperature sensor and the second temperature sensor are respectively in communication connection with the control unit,
further, the principle that the actuator adjusts the distance between the energy conversion layer and the radiation panel is as follows: under the refrigeration working condition, when the temperature of supplied water is not changed, the thickness of the thermal damping layer is positively correlated with the temperature of the radiation panel, and the temperature of the radiation panel is positively correlated with the temperature of indoor air; under the heating working condition, when the temperature of supplied water is not changed, the thickness of the thermal damping layer is in negative correlation with the temperature of the radiation panel, and the temperature of the radiation panel is in positive correlation with the temperature of indoor air.
Further, the setting method of the temperature threshold comprises the following steps: and determining the air dew point temperature according to the indoor air temperature and humidity, and setting the temperature threshold according to the air dew point temperature.
Further, the actuating mechanism comprises a servo amplifier, a motor, a position transmitter and a lead screw, the servo amplifier is respectively in communication connection with the motor and the position transmitter, the motor is in communication connection with the position transmitter, a first end of the lead screw is fixedly connected with the radiation panel, and a second end of the lead screw penetrates through the energy conversion layer and then is in transmission connection with the motor through a speed reducer.
Further, the adjusting assembly comprises two actuators, and the distance between the energy conversion layer and the radiation panel adjusted by the two actuators is the same or different.
Furthermore, the tail end of the radiation air conditioner also comprises a heat insulation layer, the heat insulation layer is arranged on one side, away from the thermal damping layer, of the energy conversion layer, and the thermal resistance of the heat insulation layer is larger than that of the thermal damping layer.
Furthermore, the tail end of the radiation air conditioner comprises a radiation panel, and a heat exchange layer, a heat damping layer and a regulating assembly which are symmetrically arranged on two sides of the radiation panel.
Further, the energy conversion layer includes that first person in charge, second are responsible for and a plurality of branch pipe, and is a plurality of branch pipe parallel arrangement forms the branch pipe array, first person in charge with the second is responsible for parallelly, first person in charge with the second is responsible for and fixes respectively the both ends of branch pipe array, first person in charge with the second be responsible for all with branch pipe array intercommunication.
Furthermore, the branch pipes are rectangular pipes, and the sum of the projection areas of the first main pipe, the second main pipe and the plurality of branch pipes on the radiation panel is larger than the sum of the projection areas of the gaps among the plurality of branch pipes; the wall thickness of the branch pipe is 0.5mm-2.5mm, and the heat conductivity coefficient of the branch pipe is 0.1W/mK-1.0W/mK.
The invention has the beneficial effects that:
the thermal damping adjusting radiant air conditioner terminal can dynamically adjust the thermal damping value of the thermal damping layer, thereby dynamically adjusting the plate surface temperature of the radiant panel, enabling the plate surface temperature of the radiant panel to be close to the indoor temperature to the maximum extent, improving the radiant heat transfer capacity while controlling the radiant panel not to dewing, enabling the fresh air processing state point to be the best energy-saving point, and reducing the energy consumption of the system; the energy conversion layer transfers heat in a parallel fluid channel mode, so that the radiation heat is more uniform, the heat transfer efficiency is improved, and the radiation panel is prevented from dewing; the temperature difference between the energy conversion layer and the surface of the radiation panel is larger, the requirement on the temperature of a cold source or a heat source is lower, the energy consumption is reduced, and the energy is saved; the weight is light, and the installation is convenient; the modular structure has no limitation on the application occasions.
Drawings
Fig. 1 is a schematic structural view of a radiant air conditioner terminal for adjusting thermal damping according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a radiant air conditioner terminal for adjusting thermal damping according to another embodiment of the present invention.
Fig. 3 is a schematic structural view of a radiant air conditioner terminal for adjusting thermal damping according to a third embodiment of the present invention.
Fig. 4 is a schematic diagram of an adjustment assembly.
Fig. 5 is a schematic diagram of the operation of the actuator.
Figure 6 is a psychrometric chart.
FIG. 7a is a schematic structural diagram of a transducing layer according to an embodiment.
Fig. 7b is a schematic structural diagram of a different position of the energy conversion layer from that of fig. 7 a.
Fig. 8a is a schematic structural diagram of a transducer layer according to another embodiment.
Fig. 8b is a schematic structural diagram of a different position of the energy conversion layer from that of fig. 8 a.
Fig. 9a is a schematic diagram of heat transfer from a radiant air conditioner tip without a thermal damping layer.
Fig. 9b is a schematic diagram of the heat transfer from the thermal damping regulated radiant air conditioner terminal of the present invention.
FIG. 9c is a logarithmic graph of the temperature distribution of the thermal damping layer on the outer side of the copper tube.
In the figure, the position of the upper end of the main shaft,
1. a transduction layer; 2. a thermal damping layer; 4. a radiation panel; 5. an adjustment assembly; 11. a first main tube; 12. a second main pipe; 13. a branch pipe; 14. a liquid inlet; 15. a liquid outlet; 16. a blocking member; 17. an interface; 31 a through hole; 51. a control unit; 52. an actuator; 53. a temperature and humidity sensor; 54. a first temperature sensor; 55. a second temperature sensor; 521. a servo amplifier; 522. a motor; 523. a position transmitter; 524. a lead screw; 525. and a speed reducer.
Detailed Description
The radiation air conditioner terminal for adjusting thermal damping provided by the invention is explained and explained in detail in the following with the attached drawings of the specification.
As shown in fig. 1, the present embodiment specifically discloses a radiation air conditioner terminal for adjusting thermal damping, which includes a transducer layer 1, a thermal damping layer 2, and a radiation panel 4, which are sequentially disposed, where the thermal damping layer 2 is an air layer formed between the transducer layer 1 and the radiation panel 4.
The radiant air conditioning tip further comprises an adjustment assembly 5 for adjusting the thickness of the thermal damping layer 2. The adjusting component 5 comprises an actuating mechanism 52, at least one temperature and humidity sensor 53, at least one first temperature sensor 54 (not shown in the figure) and at least one second temperature sensor 55, wherein the temperature and humidity sensor 53 is used for monitoring the temperature and humidity of indoor air where the tail end of the radiant air conditioner is located, the first temperature sensor 54 is used for monitoring the temperature of supplied water, the second temperature sensor 55 is used for monitoring the temperature of the radiant panel 4, the actuating mechanism 52 controls the actuating mechanism 52 to adjust the distance between the energy conversion layer 1 and the radiant panel 4 according to the temperature of the supplied water and the temperature and humidity of the indoor air, namely, the thickness of an air layer between the energy conversion layer 1 and the radiant panel 4 is adjusted, so that the thermal damping value of the thermal damping layer 2 is adjusted, the temperature of the radiant panel reaches a temperature threshold value, the maximum limit is kept. In the embodiment, the actuator 52 is manually controlled, so that the actuator 52 can be controlled in real time to adjust the distance between the energy conversion layer 1 and the radiation panel 4 according to the water supply temperature and the indoor temperature and humidity.
As shown in fig. 2, in another embodiment, a radiant air conditioner terminal for adjusting thermal damping is specifically disclosed, which comprises a transducer layer 1, a thermal damping layer 2 and a radiation panel 4, which are sequentially arranged, wherein the thermal damping layer 2 is an air layer formed between the transducer layer 1 and the radiation panel 4.
The radiant air conditioning tip further comprises an adjustment assembly 5 for adjusting the thickness of the thermal damping layer 2. As shown in fig. 4, the adjusting assembly 5 includes a control unit 51, an actuator 52, at least one temperature and humidity sensor 53, at least one first temperature sensor 54, and at least one second temperature sensor 55, the actuator 52, the temperature and humidity sensor 53, the first temperature sensor 54, and the second temperature sensor 55 are respectively connected to the control unit 51 in a communication manner, the temperature and humidity sensor 53 is used for monitoring the temperature and humidity of the indoor air where the radiant air conditioner terminal is located, the first temperature sensor 54 is used for monitoring the temperature of the supplied water, the second temperature sensor 55 is used for monitoring the temperature of the radiant panel 4, the actuator 52 is used for adjusting the distance between the energy conversion layer 1 and the radiant panel 4, the control unit 51 controls the actuator 52 to adjust the distance between the energy conversion layer 1 and the radiant panel 4 according to the temperature of the supplied water and the temperature and humidity of the indoor air, that is, the thickness of the, the thermal damping value of the thermal damping layer 2 is adjusted, so that the temperature of the radiation panel reaches a temperature threshold value, the radiation panel is always kept close to the indoor temperature to the maximum extent, and the aim of preventing condensation is fulfilled.
In practical use, the indoor space is composed of a plurality of radiation air conditioner terminals, each radiation air conditioner terminal is provided with an actuating mechanism 52, the plurality of radiation air conditioner terminals can adopt the same control unit 51, namely the actuating mechanisms 52 are in communication connection with the control unit 51, and the control unit 51 controls the actuating mechanisms 52 to synchronously work simultaneously, so that the radiation heat in the whole indoor space is uniform.
The principle of the actuator 52 adjusting the distance between the energy conversion layer 1 and the radiation panel 4 is: under the refrigeration working condition, when the temperature of the supplied water is not changed, the thickness of the thermal damping layer 2 is in positive correlation with the temperature of the radiation panel; while the radiant panel temperature and the indoor air temperature are positively correlated. Therefore, the thickness of the thermal damping layer 2 is adjusted, that is, the indoor air temperature is adjusted, and the larger the thickness of the thermal damping layer 2 is, the higher the indoor temperature is. Under the heating working condition, when the water supply temperature is not changed, the thickness of the thermal damping layer 2 is in negative correlation with the temperature of the radiation panel; while the radiant panel temperature and the indoor air temperature are positively correlated. Therefore, the thickness of the thermal damping layer 2 is adjusted, that is, the indoor air temperature is adjusted, and the larger the thickness of the thermal damping layer 2 is, the lower the indoor temperature is. The thickness of the thermal damping layer is dynamically adjusted according to three parameters of water supply temperature, indoor air temperature and indoor air humidity, the plate surface temperature of the radiation panel is dynamically adjusted by adjusting the thickness of the thermal damping layer, the plate surface temperature of the radiation panel is enabled to be close to the indoor temperature to the maximum extent, and the radiation heat transfer capacity is improved while the radiation panel is controlled not to be dewed.
The air dew point temperature is determined according to the indoor air temperature and humidity, specifically according to a standard enthalpy diagram shown in fig. 6, then the temperature threshold to be reached by the radiation panel temperature is set according to the air dew point temperature, and when the radiation panel temperature reaches the temperature threshold, the adjusting speed of the actuating mechanism 52 is manually adjusted or adjusted through the control unit 51.
When the number of the temperature and humidity sensors, the first temperature sensors and the second temperature sensors is one, the data monitored by the sensors can be directly adopted; when the number of each sensor is plural, the average value of the detection data of the same kind of sensor is calculated, and the actuator 52 is controlled to adjust the distance between the energy conversion layer 1 and the radiation panel 4 according to the four average values. In this embodiment, the temperature of the radiation panel refers to the plate surface temperature of the radiation panel, and the second temperature sensor 55 is mounted on the plate surface of the radiation panel.
As shown in fig. 4 and 5, the actuator 52 includes a servo amplifier 521, a motor 522, a position transmitter 523 and a lead screw 524, the servo amplifier 521 is respectively connected with the motor 522 and the position transmitter 523 in a communication manner, the motor 522 is connected with the position transmitter 523 in a communication manner, a first end of the lead screw 524 is fixedly connected with the radiation panel 4, a second end of the lead screw 524 penetrates through the energy conversion layer 1 and then is in transmission connection with the motor 522 through a speed reducer 525, the motor 522 is connected with the speed reducer 525 through a first coupling, and the speed reducer 525 is connected with the lead screw 524 through a second coupling.
When the actuator 52 is manually controlled, the thickness of the thermal damping layer can be increased or decreased by directly operating the forward and reverse rotation of the motor 522 and the operation time of the motor 522.
When the radiation panel is automatically controlled by the control unit 51, the servo amplifier 521 and the motor 522 are respectively in communication connection with the control unit 51, the control unit 51 transmits an output signal to the servo amplifier 521, the motor 522 is controlled to work, the motor 522 drives the screw rod 524 to rotate and move, the position transmitter 523 monitors the number of turns of the motor 522 in real time, namely the moving distance of the screw rod 524, the position transmitter 523 transmits position information to the servo amplifier 521 and further transmits the position information to the control unit 51, and when the temperature of the radiation panel is close to the indoor temperature, the control unit 51 controls the motor 522 to stop working. The forward and reverse movement of the screw rod, i.e. the increase or decrease of the thickness of the thermal damping layer, is realized by controlling the forward and reverse rotation of the motor 522.
The following illustrates the process of dynamically adjusting the thickness of the thermal damping layer at the end of the radiant air conditioner of the present invention:
the water supply temperature is 10 ℃, the thickness of the initial thermal damping layer is 1.5mm, the indoor dry bulb temperature is 26 ℃, the relative humidity is 50%, the air dew point temperature is 15 ℃, and the radiation panel temperature is 22 ℃; the drive actuator 52 can now execute a number of automatic control modes to adjust the thermal damping layer thickness (air layer thickness), for example:
a rapid cooling mode: gradually reducing the distance between the energy conversion layer and the radiation panel at the speed of 0.5 mm/min, namely gradually reducing the thickness of the air layer until the temperature of the panel surface of the radiation panel is reduced to be 0.8 ℃ above the dew point temperature of the air, stopping adjustment and maintaining the thickness of the air layer; when the temperature of the surface of the radiation panel approaches the dew point temperature of air within 0.5 ℃, the thickness of the air layer is increased at the speed of 0.5 mm/min until the temperature of the surface of the radiation panel is higher than the dew point temperature by 0.6 ℃, and then the adjustment is stopped, and the thickness of the air layer is maintained; and if the temperature of the surface of the radiation panel continuously fluctuates, continuously and dynamically adjusting according to the rule.
Standard refrigeration mode: gradually reducing the thickness of the air layer at the speed of 0.1 mm/min until the temperature of the panel surface of the radiation panel is reduced to be 1.5 ℃ above the dew point temperature, stopping adjustment and maintaining the thickness of the air layer; when the plate surface temperature of the radiation panel approaches the dew point temperature within 1 ℃, increasing the thickness of the air layer at the speed of 0.1 mm/min until the plate surface temperature of the radiation panel is higher than the dew point temperature by 1.2 ℃, stopping adjustment and maintaining the thickness of the air layer; and if the temperature of the plate surface continuously fluctuates, continuously and dynamically adjusting according to the rule.
Energy-saving refrigeration mode: gradually reducing the thickness of the air layer at the speed of 0.05 mm/min until the temperature of the panel surface of the radiation panel is reduced to be 3 ℃ above the dew point temperature, stopping adjustment and maintaining the thickness of the air layer; when the temperature of the panel surface of the radiation panel approaches the dew point temperature within 2 ℃, increasing the thickness of the air layer at the speed of 0.05 mm/min until the temperature of the panel surface is 2.5 ℃ above the dew point temperature, stopping adjusting and maintaining the thickness of the air layer; and if the temperature of the surface of the radiation panel continuously fluctuates, continuously and dynamically adjusting according to the rule.
The adjustment range of the adjustment assembly 5 is 0.5mm-5mm, i.e. the thickness of the air layer is 0.5mm-5mm, the heat conductivity coefficient lambda of the air is about 0.026W/mK at room temperature, so that the thermal resistance range of the thermal damping layer 2 is 0.023m2K/W-0.1m2K/W。
The thermal damping adjusting radiation air conditioner tail end can adjust the plate surface temperature of the radiation panel within the range of 12-25 ℃ freely by dynamically adjusting the thermal damping value of the radiation air conditioner tail end under the condition that the radiation air conditioner system adopts 10 ℃ chilled water for energy supply, thereby being capable of adapting to the anti-condensation high-efficiency operation of various operation environments freely.
In the third embodiment, the adjustment assembly 5 includes two actuators 52, and the distance between the transducer layer 1 and the radiation panel 4 adjusted by the two actuators 52 is the same or different.
When the distance between the transducer layer 1 and the radiation panel 4 adjusted by the two actuators 52 is the same, the thickness of the thermal damping layer is uniform, and the temperature of the surface of the radiation panel 4 is uniform.
When the distance between the transducer layer 1 and the radiation panel 4 adjusted by the two actuators 52 is different, taking the two actuators 52 respectively disposed at the upper part and the lower part of the radiation panel as an example, the effect of different temperatures at the upper part and the lower part of the radiation panel can be formed, and the radiation panel can be applied to different application scenes for improving indoor comfort and energy saving.
For example: for the screen type radiation air conditioner terminal, in winter, because the hot air has the rising characteristic, the indoor top temperature is higher than that below, and personnel move under the middle. The thermal damping layer of the lower part can be adjusted to be thinner, and the temperature of the radiation panel of the lower part is slightly higher than that of the upper part, so that the indoor comfort and the energy conservation are improved.
In summer, the cold air above the air conditioner can be settled due to reverse adjustment, so that the indoor comfort and the energy conservation are improved.
The radiation air conditioner terminal also comprises a heat insulation layer, the heat insulation layer is arranged on one side of the energy conversion layer 1 far away from the thermal damping layer 2, and the thermal resistance of the heat insulation layer is larger than that of the thermal damping layer 2. The heat insulation layer and the thermal damping layer 2 form asymmetric heat transfer, more heat is transferred to one side of the thermal damping layer 2, and the heat insulation layer is used as an air layer of the thermal damping layer 2 to enable radiation to be more uniform, so that the anti-condensation effect is achieved. Thermal resistance of thermal insulation layer>0.1m2K/W, preferably thickness of the thermal insulation layer>1mm, and the heat conductivity coefficient is less than or equal to 0.05W/mK. More preferably, the thickness of the heat insulation layer is 2.5mm-50mm, and the heat conductivity coefficient is 0.001W/mK-0.05W/mK. The heat insulation layer is a hard plastic plate or a foaming molding plate.
In some embodiments, the radiant air conditioner terminal comprises a radiant panel and a heat exchange layer, a heat damping layer and a regulating component which are symmetrically arranged on two sides of the radiant panel. The tail end of the radiation air conditioner is vertically installed and used as an indoor partition. The thickness of the thermal damping layers at the two sides of the radiation panel can be respectively adjusted according to the water supply temperature of the radiation panel, the plate surface temperatures at the two sides of the radiation panel and different indoor temperatures and humidities at the two sides of the radiation panel, so that the indoor temperature environments at the two sides can be individually adjusted. The advantages are that: not only has the function of partition, but also plays the role of air conditioning for two spaces simultaneously.
As shown in fig. 7a, 7b, 8a and 8b, the energy conversion layer 1 includes a first main pipe 11, a second main pipe 12 and a plurality of branch pipes 13, the plurality of branch pipes 13 are arranged in parallel to form a branch pipe array, the first main pipe 11 and the second main pipe 12 are arranged in parallel, the first main pipe 11 and the second main pipe 12 are respectively fixed at two ends of the branch pipe array, and the first main pipe 11 and the second main pipe 12 are both communicated with the branch pipe array. After entering the energy conversion layer 1 through the first main pipe 11 or the second main pipe 12, the liquid of the cold source or the heat source flows through the parallel channels formed by the plurality of branch pipes 13 to transfer heat. The heat transfer mode that a plurality of branch pipes are connected in parallel is adopted, so that the fluid channel in the energy conversion layer is in parallel short stroke, and compared with the fluid channel in series long stroke, the fluid resistance is reduced, the energy consumption is reduced, and the heat transfer is more uniform.
The plurality of branch pipes 13 may be perpendicular to the first main pipe 11 and the second main pipe 12, or may form an angle with the first main pipe 11 and the second main pipe 12 (i.e., the branch pipes 13 are disposed obliquely between the first main pipe 11 and the second main pipe 12). Preferably, the plurality of branch pipes 13 are perpendicular to the first main pipe 11 and the second main pipe 12.
The wall thickness of the branch pipe 13 is 0.5mm-2.5mm, and the heat conductivity coefficient of the branch pipe 13 is 0.1W/mK-1.0W/mK. Preferably, the branch pipe 13 is a PP-R pipe (polypropylene random copolymer pipe), a LDPE pipe (low density polyethylene pipe), a HDPE pipe (high density polyethylene pipe), a PP pipe (polypropylene pipe), a PET pipe (poly terephthalic acid pipe), a PMMA pipe (polymethyl methacrylate pipe), a PVC pipe (polyvinyl chloride pipe), a PEEK pipe (polyether ether ketone pipe), a PC pipe (polycarbonate fiber), a polybutylene pipe, a polyamide fiber pipe, an epoxy resin pipe, or a nylon pipe. Compared with a metal pipe, the branch pipe 13 is light in weight, convenient to transport and install and capable of reducing the difficulty of field installation, and the arrangement of the wall thickness and the heat conductivity coefficient enables the branch pipe to be good in heat conduction effect on the basis of keeping light weight and strength.
Preferably, the surface of the branch pipe 13 is black or dark with a high emissivity.
As shown in fig. 7a and 7b, the liquid inlet 14 and the liquid outlet 15 of the energy conversion layer 1 are both arranged on the first main pipe 11, and a blocking member 16 is arranged inside the first main pipe 11, and the blocking member 16 is positioned between the liquid inlet 14 and the liquid outlet 15. The liquid enters the first main pipe 11 from the liquid inlet 14 and is blocked at the blocking member 16, and the blocking member 16 divides the first main pipe 11 into left and right sides; the liquid entering the first main pipe 11 is branched into the plurality of branch pipes 13 on the left side of the blocking member 16 on the left side of the first main pipe 11, and the fluid is converged into the second main pipe 12 through the branch pipes 13, is further branched into the plurality of branch pipes 13 on the right side of the blocking member 16, is finally converged into the right side of the first main pipe 11, and flows out from the liquid outlet 15. The direction of the arrows in the figure is the direction of flow of the liquid.
As shown in fig. 7a, the liquid inlet 14 and the liquid outlet 15 are respectively disposed at the left end and the right end of the first main pipe 11, the liquid inlet 14 and the liquid outlet 15 are both connected with the connectors 17, and the two radiation air conditioners are directly connected with each other through the connectors 17, so that the difficulty in installing the radiation air conditioners at the ends is reduced.
As shown in fig. 7b, two ends of the first main pipe 11 are closed ends, the liquid inlet 14 and the liquid outlet 15 are disposed on the pipe body of the first main pipe 11, the liquid inlet 14 and the liquid outlet 15 are both connected with a connector 17, and the connector 17 is perpendicular to the first main pipe 11. When the installation is carried out, the joint 17 on the two adjacent radiation air conditioner tail ends is connected through a hose to realize the combined installation. One end of the hose is connected with a connector 17 at the liquid outlet 15 at the tail end of one radiation air conditioner, and the other end of the hose is connected with a connector 17 at the liquid outlet 15 at the tail end of the other radiation air conditioner.
As shown in fig. 8a and 8b, the liquid inlet 14 of the transduction layer 1 is arranged on the first main pipe 11, the liquid outlet 15 of the transduction layer 1 is arranged on the second main pipe 12, and the liquid inlet 14 and the liquid outlet 15 are arranged on different sides of the branch pipe array, i.e. the liquid inlet 14 and the liquid outlet 15 are arranged diagonally. The liquid enters the first main pipe 11 from the liquid inlet 14, is branched into the plurality of branch pipes 13, flows through the plurality of branch pipes 13 connected in parallel, then converges to the second main pipe 12, and flows out from the liquid outlet 15 of the second main pipe 12. The direction of the arrows in the figure is the direction of flow of the liquid.
Fourier heat conduction law: q ═ λ (α t/α x) n
Wherein, q: a heat flux density; λ: coefficient of thermal conductivity; α t/α x: a temperature gradient; n: normal unit vector on the isotherm.
As shown in fig. 9a, without the thermal damping layer, the energy conversion layer 1 is in direct contact with the radiation panel 4; due to the lack of y-direction heat conduction by the thermal damping layer 2, the isotherm T4 of the radiating panel 4 is more curved, i.e. the surface temperature difference is larger.
As shown in fig. 9b, a thermal damping layer 2 is provided between the transduction layer 1 and the radiation panel 4; according to the fourier heat conduction law, in the isotropic thermal damping layer 2, if heat enters the thermal damping interior from the transduction layer 1, the passing heat flow density q is maximum due to the temperature gradient (the isotherm shows a curve in the x-y section) existing in the x and y directions near the left side. Due to the integral accumulation effect, it can be calculated that: when the heat reaches the right boundary of the thermal damping layer 2, the isotherm tends to be flat, that is, the temperature of the right boundary of the thermal damping layer 2 tends to be uniform. The isotherm T4 of the radiation panel 4 is flatter.
Therefore, the radiation heat at the tail end of the radiation air conditioner additionally provided with the thermal damping layer 2 is more uniform, the radiation effect is better, and the condensation phenomenon is prevented. The invention dynamically adjusts the thermal damping value of the thermal damping layer, thereby enhancing the anti-condensation capability and avoiding the condensation phenomenon.
Theoretical basis of isotherms: a common heat conducting structural member is a copper tube, as shown in fig. 9c, if the thermal damping layer is regarded as a half-side cylindrical wall, the copper tube and the thermal damping layer are similar to a one-dimensional steady-state heat conduction process of a single-layer cylindrical wall. The temperature distribution in the thermal damping layer (t1-t2) is logarithmic, as deduced from the Poplar name "Heat transfer science", fourth edition, P52.
According to the Fourier heat conduction law, the uniformity degree of the right side boundary of the thermal damping layer is positively correlated with the heat conduction coefficient lambda and the thickness x of the thermal damping material. However, as the thermal conductivity λ or the thickness x increases, the efficiency of heat conduction decreases; when the thermal damping material adopts air, the increase of the thickness x also increases the thermal convection, and is not beneficial to the flattening of the isotherm. However, if the air layer thickness x is too small, the heat conduction efficiency will be improved, but the temperature difference between the energy conversion layer and the surface of the radiation panel will be small, the surface of the radiation panel will generate dew, and the temperature of the cold source will need to be increased during cooling, resulting in high energy consumption and high cost.
Therefore, the thickness of the thermal damping layer adjusted by the adjusting component is within the range of 0.5mm-5mm, so that the heat conduction efficiency is ensured, and the energy-saving effect is achieved.
The control unit may have a time programming function and may be provided with periodic (e.g. daily and weekly) adjustment actions, such as lowering the thermal damping layer thickness before 7:30 shift work, increasing the cooling capacity and adjusting to the minimum thickness at a certain time interval during noon and afternoon when the sun is well lit, and increasing the thickness at night, which significantly reduces the cooling capacity.
The control unit may have a self-learning function, and change the control strategy according to the history data.
The heat insulation layer and the thermal damping layer form an asymmetric energy-exchanging radiation air conditioner tail end, and the experiment is carried out by adopting an EPP (expanded polypropylene) foaming heat insulation plate with the thickness of 10mm and the radiation air conditioner tail end with the thermal damping layer with the thickness of a fixed value of 1 mm. The experimental environment was at an indoor temperature of 28.5 deg.C, a relative humidity of 60%, and a corresponding dew point temperature of 20 deg.C. After the chilled water with the temperature of 10 ℃ is input into the transduction layer at the tail end of the radiation air conditioner for 1 hour, the actually measured plate surface temperature of the radiation panel is 24.2-24.7 ℃, and the outer surface temperature of the heat insulation layer is 28.0-28.3 ℃. Because the thermal resistance of the thermal insulation layer is higher and the thermal resistance of the thermal damping layer is lower, more heat can be transmitted into the energy conversion layer from one side of the thermal damping layer and absorbed by the chilled water, so that the temperature of the panel surface of the radiation panel is lower, and the tail end of the radiation air conditioner can be freely suitable for the anti-condensation high-efficiency operation in various operation environments.
In conclusion, the thermal damping layer of the thermal damping layer is dynamically adjusted, so that the plate surface temperature of the radiation panel is dynamically adjusted, the plate surface temperature of the radiation panel is enabled to be close to the indoor temperature to the maximum extent, and the radiation heat transfer capacity is improved while the radiation panel is controlled not to be dewed. Moreover, the tail end of the radiation air conditioner for adjusting the thermal damping is of a standardized module structure, is light and cheap, is convenient to transport, and is convenient and quick to assemble and install on a construction site; the method can be applied to different building scenes such as suspended ceilings, wall surfaces or grounds, and has no limitation on use occasions.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "the present embodiment," "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The radiation air conditioner tail end capable of adjusting thermal damping is characterized by comprising a heat exchange layer (1), a thermal damping layer (2) and a radiation panel (4) which are sequentially arranged, wherein the thermal damping layer (2) is an air layer formed between the heat exchange layer (1) and the radiation panel (4);
the radiation air conditioner is terminal still including being used for adjusting regulating part (5) of thermal damping layer (2) thickness, regulating part (5) include actuating mechanism (52), at least one temperature and humidity sensor (53), at least one first temperature sensor (54) and at least one second temperature sensor (55), temperature and humidity sensor (53) are used for monitoring the humiture of the terminal room air of place of radiation air conditioner, first temperature sensor (54) are used for monitoring the water supply temperature, second temperature sensor (55) are used for monitoring the temperature of radiation panel (4), actuating mechanism (52) are used for adjusting according to water supply temperature and room air humiture the distance between transducer layer (1) and radiation panel (4) makes the radiation panel temperature reach the temperature threshold.
2. The radiant air conditioning terminal for adjusting thermal damping according to claim 1, characterized in that the adjusting assembly (5) further comprises a control unit (51), the actuator (52), the temperature and humidity sensor (53), the first temperature sensor (54) and the second temperature sensor (55) being in communication connection with the control unit (51), respectively.
3. Radiant air conditioning terminal adjusting thermal damping according to claim 1 or 2, characterized in that the actuator (52) adjusts the distance between the energy conversion layer (1) and the radiant panel (4) on the principle: under the refrigeration working condition, when the temperature of supplied water is not changed, the thickness of the thermal damping layer (2) is in positive correlation with the temperature of the radiation panel, and the temperature of the radiation panel is in positive correlation with the temperature of indoor air; under the heating working condition, when the temperature of supplied water is not changed, the thickness of the thermal damping layer (2) is in negative correlation with the temperature of the radiation panel, and the temperature of the radiation panel is in positive correlation with the temperature of indoor air.
4. The radiant air conditioner terminal for adjusting thermal damping of claim 1, wherein the temperature threshold setting method comprises: and determining the air dew point temperature according to the indoor air temperature and humidity, and setting the temperature threshold according to the air dew point temperature.
5. The radiant air conditioning terminal for adjusting thermal damping as claimed in claim 1 or 2, wherein the actuator (52) comprises a servo amplifier (521), a motor (522), a position transmitter (523) and a lead screw (524), the servo amplifier (521) is respectively connected with the motor (522) and the position transmitter (523) in a communication manner, the motor (522) is connected with the position transmitter (523) in a communication manner, a first end of the lead screw (524) is fixedly connected with the radiation panel (4), and a second end of the lead screw (524) passes through the energy conversion layer (1) and then is connected with the motor (522) through a speed reducer (525) in a transmission manner.
6. Radiant air conditioning terminal to adjust thermal damping according to claim 5, characterized in that said adjusting assembly (5) comprises two of said actuators (52), the distance between said energy conversion layer (1) and the radiating panel (4) adjusted by the two actuators (52) being the same or different.
7. The radiant air conditioning terminal for adjusting thermal damping of claim 1, further comprising a thermal insulation layer disposed on a side of the energy conversion layer (1) away from the thermal damping layer (2), the thermal insulation layer having a thermal resistance greater than that of the thermal damping layer (2).
8. The radiant air-conditioning terminal for adjusting thermal damping according to claim 1, characterized in that it comprises a radiant panel (4) and a heat-exchanging layer (1), a thermal damping layer (2) and an adjusting component (5) symmetrically arranged on both sides of the radiant panel (4).
9. The radiant air conditioning terminal for adjusting thermal damping according to claim 1, wherein the energy conversion layer (1) comprises a first main pipe (11), a second main pipe (12) and a plurality of branch pipes (13), the plurality of branch pipes (13) are arranged in parallel to form a branch pipe array, the first main pipe (11) and the second main pipe (12) are parallel, the first main pipe (11) and the second main pipe (12) are respectively fixed at two ends of the branch pipe array, and the first main pipe (11) and the second main pipe (12) are both communicated with the branch pipe array.
10. The terminal for radiant air conditioning for adjusting thermal damping according to claim 9, wherein the branch pipes (13) are rectangular pipes, and the sum of the projected areas of the first main pipe (11), the second main pipe (12) and the plurality of branch pipes (13) on the radiant panel is larger than the sum of the projected areas of the gaps between the plurality of branch pipes (13); the wall thickness of the branch pipe (13) is 0.5mm-2.5mm, and the heat conductivity coefficient of the branch pipe (13) is 0.1W/mK-1.0W/mK.
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| WO2023222539A1 (en) | 2022-05-17 | 2023-11-23 | interpanel GmbH | Heat exchanger panel for controlling the temperature of a space |
| DE102022112411A1 (en) | 2022-05-17 | 2023-11-23 | interpanel GmbH | Heat exchanger panel for temperature control of a room |
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| CN111912066B (en) | 2021-04-30 |
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Denomination of invention: Radiant air conditioning end with adjustable thermal damping Granted publication date: 20210430 Pledgee: Bank of Jiangsu Limited by Share Ltd. Wuxi New District sub branch Pledgor: WUXI FRESHAIR AQ TECHNOLOGY Co.,Ltd. Registration number: Y2024980012875 |