A convective radiation coupling end device and control method

Abstract

The application discloses a convection-radiation coupling terminal device and a control method, the device comprising: a radiation heat exchange component, the radiation heat exchange component comprising a radiation heat exchange plate, the radiation heat exchange plate being provided with uniformly distributed micro-hole structures, the radiation heat exchange plate being provided with a return air panel on the peripheral side, the return air panel being provided with an air supply opening and a return air opening distributed around the air supply opening; a convection heat exchange component comprising a convection heat exchange pipe; and an air exchange component, the air exchange component being used for driving airflow to pass through the return air opening to return air, and to pass through the convection heat exchange component and the radiation heat exchange component to exchange heat and then to realize air supply from the air supply opening; the scheme designs the convection-radiation coupling terminal device and a double-variable-flow control technology, widens the cold and heat supply and demand range, realizes accurate load regulation, takes human comfort as a control target, accurately controls the convection and radiation cold and heat output proportion, satisfies the comfort requirement of personnel in public buildings, and reduces the operation energy consumption of the terminal equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a convection-radiation coupled terminal device and a control method. BACKGROUND

[0002] Public buildings mostly use convection terminal devices to regulate temperature. When the convection terminal device is running, it has high energy consumption and causes obvious blowing sensation, resulting in uneven cold and heat in the building and poor comfort. In recent years, cold radiation terminal devices have been applied in a certain range due to their advantages of no wind and low noise, but they have problems such as easy condensation, slow temperature response, and poor dehumidification effect.

[0003] The existing radiation air conditioning system uses a radiation plate as a radiation terminal. The radiation plate has a large area, and a double-cold-source main unit is mostly used for the cold water unit. This has the disadvantages of large building space occupation, high cost, and large installation difficulty. In addition, the existing radiation air conditioning system uses independent temperature and humidity control, and the radiation terminal and the dehumidification equipment are independently operated without intelligent linkage, resulting in energy waste. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a convection-radiation coupled terminal device and a control method, which solves the problem of energy waste caused by the existing radiation air conditioning system in the background art.

[0005] To achieve the above purpose, the present application proposes the following technology to achieve the above purpose:

[0006] A convection-radiation coupled terminal device, comprising:

[0007] A radiation heat exchange assembly, the radiation heat exchange assembly comprises a radiation heat exchange plate, the radiation heat exchange plate is provided with uniformly distributed micro-porous structures, the radiation heat exchange plate is provided with a return air panel on the side, the return air panel is provided with a supply air outlet and a return air outlet distributed around the supply air outlet;

[0008] A convection heat exchange assembly, comprising a convection heat exchange pipe;

[0009] An air exchange assembly, the air exchange assembly is used to drive airflow to return air through the return air outlet, heat exchange through the convection heat exchange assembly and the radiation heat exchange assembly, and then supply air through the supply air outlet.

[0010] Further, it further comprises a water mixing assembly, the convection heat exchange pipe and the radiation heat exchange pipe in the radiation heat exchange plate are respectively connected with a water mixing processor in the water mixing assembly, the water mixing processor is communicated with an external main pipe through a water outlet pipe assembly, and the convection heat exchange pipe is communicated with the external main pipe through a water inlet pipe assembly.

[0011] Further, the water mixing processor is provided with a water inlet connected to the end of the convection heat exchange pipe, and a water mixing inlet and a water mixing outlet connected to the radiation heat exchange pipe, and the water mixing processor is connected to the water outlet pipe assembly through the water outlet.

[0012] Further, the convection heat exchange pipe is installed in the heat exchanger, the heat exchanger is provided with an installation cavity, the radiation heat exchange plate and the return air panel are respectively arranged above the heat exchanger, the size of the radiation heat exchange plate matches the size of the installation cavity, and the inner side wall surface of the heat exchanger is provided with uniformly distributed fins.

[0013] Further, the air exchange assembly includes a fan and a motor arranged inside the installation cavity, two interaction sensors are arranged at the bottom of the return air panel in diagonal opposition, and the inner side of the heat exchanger is provided with a water temperature temperature sensing bag and an environment temperature sensing bag.

[0014] Further, the middle part of the return air panel is provided with an air outlet panel, the air outlet panel is provided with an air outlet, the air outlet panel is provided with a grille, the return air inlet is arranged on the side of the air outlet panel, and the return air inlet is provided with a guide vane.

[0015] Further, the convection heat exchange pipe is arranged in a ring around the heat exchanger and is distributed vertically, the radiation heat exchange pipe is horizontally distributed in the radiation heat exchange plate, and the installation cavity is provided with a partition plate between the radiation heat exchange plate and the fan.

[0016] A control method suitable for the above-mentioned convection-radiation coupling terminal device, the control method comprising:

[0017] Setting an indoor temperature target value; adjusting the rotating speed of the fan of the air exchange assembly according to the indoor temperature target value; calculating an air outlet temperature target value according to the indoor temperature target value, and adjusting the refrigerant flow in the radiation heat exchange plate and the convection heat exchange pipe according to the air outlet temperature target value.

[0018] Further, the method of adjusting the rotating speed of the fan of the air exchange assembly according to the indoor temperature target value comprises: detecting the indoor environment temperature value, calculating the required air volume according to the difference between the indoor temperature target value and the environment temperature value, calculating the motor operating frequency according to the required air volume, and operating the motor at a constant rotating speed according to the obtained operating frequency; detecting the environment temperature at a set time interval, and then repeatedly executing the above steps until the environment temperature value is equal to the indoor temperature target value.

[0019] Further, the method of calculating the air outlet temperature target value according to the indoor temperature target value comprises: air outlet temperature target value = indoor temperature target value - temperature adjustment value; wherein the temperature adjustment value is a set value.

[0020] Further, the control method comprises:

[0021] The opening degree of the proportional water valve connected with the radiant heat exchange plate and the convection heat exchange pipe is adjusted to adjust the refrigerant flow in the radiant heat exchange plate and the convection heat exchange pipe; wherein the method for adjusting the opening degree of the proportional water valve comprises: calculating the proportional water valve opening degree increment D = the target value of the air outlet temperature - the actual air outlet temperature value, the proportional water valve adjustment step = D / 5, when D >= 0, then the proportional water valve is adjusted to be opened by |D|%, when D < 0, then the proportional water valve is adjusted to be closed by |D|%, if the actual proportional water valve opening degree increment |D| >= 5, the adjustment is carried out according to the maximum step of 5%.

[0022]

[0023] Further, the convection-radiation coupling terminal devices in the same space are provided with multiple and are respectively connected to the control system in communication, the convection-radiation coupling terminal devices detect the indoor personnel quantity and position through sensors, and the control system adjusts the operation quantity of the convection-radiation coupling terminal devices in the space according to the indoor personnel quantity and position to adjust the refrigerating capacity.

[0024] Compared with the prior art, the comprehensive effects brought by the present application include:

[0025] (1) The return air inlets distributed around the return air panel are arranged in the present application, the four-side return air flow process is uniform, the return air is subjected to multiple heat exchanges through the convection heat exchange assembly and the radiation heat exchange assembly, the heat exchange efficiency is improved, and the energy consumption is reduced; the radiant heat exchange plate can realize the functions of radiation heat exchange and air supply through micropores to strengthen the radiation heat exchange, the forced convection fluid is provided through the air exchange assembly, the radiation heat exchange of the radiant heat exchange plate is carried out while the forced convection heat exchange is increased, so that the heat exchange capacity of the radiant heat exchange plate is improved, the terminal devices are linked through the convection-radiation coupling terminal devices, the operation energy consumption of the terminal devices is reduced, and the advantages of fast convection heat exchange response speed and low-noise and comfortable radiation heat exchange are simultaneously achieved.

[0026] (2) The convection heat exchange pipe and the radiation heat exchange pipe are connected through the water mixing processor, the medium-temperature water supply is supplied to the convection heat exchanger, the medium-temperature water return after heat exchange is mixed through the water mixing processor to supply the radiant heat exchange plate, the high-temperature water return after heat exchange of the radiant heat exchange plate is input into the water mixing processor, the medium-temperature water return and the high-temperature water return are mixed, the water temperature supplied to the radiant heat exchange plate is improved, the dew problem is avoided, the medium-temperature water convection refrigeration and dehumidification and the high-temperature water radiation refrigeration solve the dew problem.

[0027] (3) The air volume adjustment and the water flow adjustment are realized through the indoor temperature target value, the double-variable flow decoupling control strategy is realized, the air volume is adjusted by controlling the fan speed, the adjustment steps are consistent, and the stability is strong; the water flow is quickly responded by controlling the proportional water valve, the adjustment lag is avoided, the cold and heat supply and demand range is widened, the temperature is accurately adjusted, the comfort requirement of the personnel in the public building is met, and the operation energy consumption of the terminal devices is reduced.​

[0028] (4) Set up interactive sensor matching control system, realize automatic identification of multiple convection and radiation coupling terminal devices, automatic networking, flexible adjustment of running quantity of convection and radiation coupling terminal devices in space, adjustment of refrigeration capacity, each terminal device can adjust according to self adjustment range and terminal quantity in space, realize accurate regulation and control according to personnel quantity and position, make the terminal reach the best operation energy efficiency and comfort. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is an explosion structure schematic diagram of the convection and radiation coupling terminal device of the embodiment of the present application.

[0030] Figure 2 It is an explosion structure schematic diagram of the convection and radiation coupling terminal device of the embodiment of the present application. Figure 1 It is a schematic diagram at A.

[0031] Figure 3 It is a return air panel structure schematic diagram of the convection and radiation coupling terminal device of the embodiment of the present application.

[0032] Figure 4 It is a whole structure schematic diagram of the convection and radiation coupling terminal device of the embodiment of the present application.

[0033] Figure 5 It is an internal structure schematic diagram of the convection and radiation coupling terminal device of the embodiment of the present application.

[0034] Figure 6 It is a water mixing processor structure schematic diagram of the convection and radiation coupling terminal device of the embodiment of the present application.

[0035] Figure 7 It is a control method flow chart diagram of the embodiment of the present application.

[0036] Legend: 1, radiation heat exchange pipe; 2, return air panel; 3, air outlet panel; 4, heat exchanger; 5, fan; 6, water mixing assembly; 7, return air outlet; 8, air outlet; 9, water mixing processor; 10, convection heat exchange pipe; 11, water inlet; 12, water mixing water inlet; 13, water mixing water outlet; 14, interactive sensor; 15, environmental temperature sensing bag; 16, partition. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0038] In this article, the relationship terms such as "first" and "second" and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. The terms "up", "down", "left", "right", "top", etc. indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0039] As shown in Figures 1 to 6 A convection-radiation coupling terminal device, comprising: a radiation heat exchange component, the radiation heat exchange component comprising a radiation heat exchange plate, the radiation heat exchange plate being provided with a uniform distribution of micro-hole structures, the radiation heat exchange plate being provided with a return air panel 2 on the periphery, the return air panel 2 being provided with a return air outlet 7 and a supply air outlet 8 distributed around the return air outlet 7; a convection heat exchange component, comprising a convection heat exchange pipe 10; an air exchange component, the air exchange component being used to drive airflow to return air through the return air outlet 7, heat exchange through the convection heat exchange component and the radiation heat exchange component, and then supply air from the supply air outlet 8.

[0040] The present application is provided with a return air outlet 7 distributed around the supply air outlet 8 on the return air panel 2, achieving uniform four-way return air flow, and the return air is subjected to multiple heat exchanges through the convection heat exchange component and the radiation heat exchange component, thereby improving the heat exchange efficiency and reducing energy consumption; the radiation heat exchange plate can not only realize the function of radiation heat exchange, but also can strengthen the radiation heat exchange through the micro-hole supply air, and the forced convection fluid is provided by the air exchange component, so that the radiation heat exchange plate can radiate heat while increasing the forced convection heat exchange, thereby improving the heat exchange capacity of the radiation heat exchange plate, and through the convection-radiation coupling terminal device, linkage is realized, the operation energy consumption of the terminal device is reduced, and the advantages of fast convection heat exchange response speed and low-noise and comfortable radiation heat exchange are simultaneously achieved.

[0041] Compared with the single radiation plate terminal device, the present application adds a convection heat exchange component, and the response speed is fast, and under the same cooling capacity, the convection-radiation coupling terminal device in the present application has a performance improvement of at least 20% compared with the single radiation plate terminal device, thereby reducing the operation cost of the device; the response speed of the convection-radiation coupling terminal device is improved by 50% compared with the single radiation terminal device with the same load, thereby effectively improving the indoor cooling and heating load elimination speed and reducing the energy consumption caused by the adjustment of the terminal parameters due to the short-term heat discomfort of the indoor personnel.

[0042] Preferably, the return air panel 2 is provided in a circular structure, and the return air outlets 7 are distributed around the center of the circular structure, achieving 360-degree uniform return air and improving the working efficiency of the air exchange component.

[0043] The convection-radiation coupling terminal device in this embodiment also includes a mixing assembly 6. The convection heat exchange tube 10 and the radiation heat exchange tube 1 in the radiation heat exchange plate are respectively connected to the mixing processor 9 in the mixing assembly 6. The mixing processor 9 is connected to the external main pipe through the outlet pipe assembly. The convection heat exchange tube 10 is connected to the external main pipe through the inlet pipe assembly. The mixing processor 9 is provided with an inlet 11 connected to the end of the convection heat exchange tube 10, and a mixing inlet 12 and a mixing outlet 13 connected to the radiation heat exchange tube 1. The mixing processor 9 is connected to the outlet pipe assembly through the outlet.

[0044] A mixing processor 9 is connected to a convection heat exchanger tube 10 and a radiation heat exchanger tube 1. Medium-temperature water supply from outside at 10 to 12 degrees Celsius enters the convection heat exchanger tube 10 through the inlet pipe assembly. After convection heat exchange, the temperature of the medium-temperature water return rises to 15 to 16 degrees Celsius. The medium-temperature water return flows into the mixing processor 9 through the inlet 11. At the same time, the high-temperature water return from the radiation heat exchanger tube 1, which is about 19 to 21 degrees Celsius, enters the mixing processor 9 through the mixing inlet 12. The medium-temperature water return mixes with the high-temperature water return. After mixing, the temperature is greater than or equal to 16 degrees Celsius. The mixed water is then supplied to the radiation heat exchanger tube 1 through the mixing outlet 13. Excess water flows into the external main pipe through the outlet. The above settings can ensure that the water supply temperature of the radiant heat exchanger tube 1 is greater than or equal to 16 degrees Celsius, thus avoiding condensation problems in the radiant heat exchanger tube 1. At the same time, the combination of radiant heat exchange and convective heat exchange can form an air film layer on the surface of the radiant heat exchanger plate, which can block humid air from the radiant heat exchanger plate and solve the condensation problem of traditional cold radiant heat exchanger plates.

[0045] In the convection-radiation coupling terminal device of this embodiment, the convection heat exchange tubes 10 are installed inside the heat exchanger 4. The heat exchanger 4 is provided with an installation cavity. The radiation heat exchange plate and the return air panel 2 are respectively arranged above the heat exchanger 4. The size of the radiation heat exchange plate matches the size of the installation cavity. The inner wall of the heat exchanger 4 is provided with uniformly distributed fins. The air exchange assembly includes a fan 5 and a motor arranged inside the installation cavity. Two interactive sensors 14 are arranged diagonally opposite each other at the bottom of the return air panel 2. The inner side of the heat exchanger 4 is provided with a water temperature sensor and an ambient temperature sensor 15. The water temperature sensor detects the temperature of the fluid inside the heat exchanger 4, and the ambient temperature sensor 15 detects the return air surface 2 and the ambient temperature. The convection heat exchange tubes 10 are arranged in a circle and vertically distributed inside the heat exchanger 4. The radiation heat exchange tubes 1 are horizontally distributed inside the radiation heat exchange plate. A partition 16 is provided inside the installation cavity. The partition 16 is located between the radiation heat exchange plate and the fan 5.

[0046] Microporous radiant heat exchange plates are arranged vertically in the convection heat exchanger 4 assembly. Preferably, the fan 5 is a centrifugal fan and the motor is a variable frequency motor. The centrifugal fan component forms an air intake flow field, and the return air is realized through the return air vent 7. The return air first passes through the convection heat exchanger 4 for heat and humidity load treatment. The fan 5 drives the fluid through the finned heat exchanger 4 for forced convection heat exchange. The hot air and the low temperature fins exchange mass and heat, which reduces the return air temperature and thus reduces the air load. Then, the return air is treated for sensible heat load by the perforated radiant heat exchange plate. The return air fluid, which has been cooled by the convection heat exchanger 4, passes through the radiant heat exchange plate for radiant heat exchange, which further reduces the fluid temperature and reaches the comfortable state point of indoor air supply temperature, thereby reducing the indoor air temperature.

[0047] Specifically, compared with traditional standalone convection heat exchange finned heat exchangers, this application can reduce the load on the convection heat exchanger, thereby increasing the water supply temperature of the convection heat exchanger 4 or reducing the air velocity, thus achieving energy saving of the main unit of the water temperature rise system. At the same time, the reduced air velocity makes the product's air outlet more comfortable. After the return air undergoes convection heat exchange, the remaining load is handled by the radiation heat exchange plate. The convection-radiation coupled terminal device provides comfortable air outlet and efficient temperature adjustment.

[0048] Preferably, the partition 16 is provided with a connector for connecting the mixing water outlet 13 and the radiant heat exchange tube 1, as well as the mixing water inlet 12 and the radiant heat exchange tube 1. The connector facilitates the installation and disassembly of the radiant heat exchange tube 1 and facilitates assembly. Furthermore, the partition 16 cooperates with the fan 5 to divide the internal space of the installation cavity, forming a fluid flow channel, which facilitates the circulation of return air and supply air, thereby improving the heat exchange efficiency.

[0049] In the convection-radiation coupling terminal device of this embodiment, an air outlet panel 3 is provided in the middle of the return air panel 2. An air supply vent 8 and a grille are provided on the air outlet panel 3. A return air vent 7 is located around the periphery of the air outlet panel 3, and a guide plate is provided inside the return air vent 7. Preferably, the size of the air outlet panel 3 matches the size of the radiant heat exchange plate to ensure the radiant heat exchange effect of the radiant heat exchange plate, facilitate air outlet, and improve air outlet comfort by providing a grille.

[0050] like Figure 7 As shown, the control method of this embodiment is applicable to the above-mentioned convection-radiation coupling terminal device. The control method includes: setting an indoor temperature target value; adjusting the fan speed of the ventilation component according to the indoor temperature target value; calculating the outlet air temperature target value according to the indoor temperature target value; and adjusting the refrigerant flow rate in the radiant heat exchange plate and the convection heat exchange tube according to the outlet air temperature target value.

[0051] The application controls the abilities of convective heat exchange and radiant heat exchange by decoupling variable water flow and variable air volume, and the two heat exchange components are fully opened or fully closed, the water supply temperature of the radiant heat exchange plate is controlled by the water mixing processor 9, precise load regulation is realized, the human comfort degree is taken as the control target, the output proportion of convective heat and radiant heat is precisely controlled, the comfort requirement of the personnel in the public building is met, the operation energy consumption of the terminal equipment is reduced, and the contradiction between the personnel thermal comfort and the high energy consumption of the building can be relieved to a certain extent.

[0052] In the control method of the embodiment, the method for adjusting the rotating speed of the fan of the air exchange assembly according to the indoor temperature target value comprises the following steps: detecting the ambient temperature value in the room, calculating the required air volume according to the difference between the indoor temperature target value and the ambient temperature value, calculating the motor operating frequency according to the required air volume, and operating the motor at a constant rotating speed according to the obtained operating frequency; detecting the ambient temperature according to the set time interval, and then repeatedly executing the above steps until the ambient temperature value is equal to the indoor temperature target value.

[0053] Taking the refrigeration mode as an example: when the indoor temperature target value is greater than the ambient temperature value, the required air volume = (maximum air volume-minimum air volume) / (indoor temperature target value-ambient temperature value), wherein the maximum air volume is the air volume corresponding to the maximum rotating speed at which the equipment can operate, and the minimum air volume is the air volume corresponding to the minimum rotating speed at which the equipment can operate, the motor operating frequency is automatically converted according to the driving algorithm according to the required air volume, and the real-time operating rotating speed is output, the motor drives the fan 5 to rotate to realize air exchange; when the indoor temperature target value is less than or equal to the ambient temperature value, the motor operates at a low gear frequency by default to realize low-speed air output, so as to maintain the stability of the environment. Preferably, the above steps are detected and executed once every 5 seconds, so that the effect of air volume adjustment has enough time to appear, the environment temperature is effectively reduced, and further adjustment is performed, and the tension of the terminal device operation is reduced, and the energy consumption is reduced. Similarly, the heating mode is performed according to the above steps.

[0054] In the control method of the embodiment, the method for calculating the air temperature target value according to the indoor temperature target value comprises: air temperature target value = indoor temperature target value-temperature adjustment value; wherein the temperature adjustment value is a set value.

[0055] Through the above setting, the air volume adjustment and the water flow adjustment are simultaneously performed at the same starting point, the indoor temperature inertia is large, the control step time is long, the air volume change has small influence on the cooling capacity, the air volume flow is adjusted by controlling the fan 5 speed to change the air volume flow to adjust the indoor temperature, the adjustment pace is consistent, and the stability is strong; the air outlet temperature is adjusted by changing the water flow, the air outlet temperature inertia is small, and the adjustment belongs to internal adjustment of the unit, the control step time is short, and the influence on the cooling capacity is large, the rapid response is realized by controlling the water flow, and adjustment lag is avoided. Preferably, the set value is selected as 13, the indoor temperature target value and the air outlet temperature target value are set to be different by 13, the discomfort caused by the air outlet temperature to the human body can be reduced, the environment temperature is quickly and effectively adjusted, and the comfort requirement of the personnel in the public building is met.

[0056] In the control method of the embodiment, the control method comprises: adjusting the opening degree of a proportional water valve connected to the radiant heat exchange plate and the convection heat exchange pipe to adjust the refrigerant flow in the radiant heat exchange plate and the convection heat exchange pipe, the proportional water valve is arranged in an external total water supply valve; wherein the method for adjusting the opening degree of the proportional water valve comprises: calculating a proportional water valve opening degree increment D = air outlet temperature target value - actual air outlet temperature value, a proportional water valve adjustment step = |D|%, when D is greater than or equal to 0, the proportional water valve is adjusted to be opened by |D|%, when D is less than 0, the proportional water valve is adjusted to be closed by |D|%, and if the actual proportional water valve opening degree increment |D| is greater than or equal to 5, the adjustment is performed at a maximum step of 5%.

[0057] Taking the refrigeration mode as an example: preferably, the fan 5 and the proportional water valve are started at the same time, the proportional water valve is adjusted to 100%, that is, a full open state, a large water flow corresponds to a large heat exchange capacity, the air outlet temperature is preliminarily and quickly reduced, and after a delay of 10 seconds, the above steps are executed to adjust the opening and closing degree of the proportional water valve, control the water flow, adjust the heat exchange capacity, and then adjust the air outlet temperature, in combination with the air outlet volume, so that the environment temperature gradually reaches the indoor temperature target value, and the proportional water valve and the variable air volume adjustment are consistent every 5 seconds. Similarly, the heating mode is performed according to the above steps.

[0058] In the application, a dynamic double-variable flow decoupling control strategy is used to adjust the environment temperature, the difference between the indoor environment temperature and the indoor temperature target value is calculated to control the motor speed output of the fan 5 frequency, so as to realize variable air volume control, the proportional water valve operation step is adjusted according to the difference between the actual air outlet temperature and the air outlet temperature target value, so as to adjust the opening degree of the proportional water valve, so as to realize variable water flow control, and the air outlet temperature target value is obtained according to the indoor temperature target value minus 13, so as to realize real-time change of the terminal device, thereby realizing the double-variable flow decoupling control strategy.

[0059] The control method of the embodiment is characterized in that a plurality of convection-radiation coupling terminal devices are arranged in the same space and are respectively connected to the control system in communication, the convection-radiation coupling terminal devices detect the number and position of the indoor personnel through sensors, and the control system adjusts the number of the convection-radiation coupling terminal devices in operation in the space and the size of the refrigerating capacity according to the number and position of the indoor personnel.

[0060] Specifically, the sensor is an interactive sensor 14 on the return air panel 2, and the diagonally arranged interactive sensor 14 increases the detectable range and improves the detection efficiency. Preferably, the interactive sensor 14 is an infrared sensor, which detects the number and position distribution of the personnel in the space and transmits the relevant data to the control system. The interactive sensor 14 is arranged to cooperate with the control system to realize automatic recognition and automatic networking of a plurality of convection-radiation coupling terminal devices, and the number of the convection-radiation coupling terminal devices in operation in the space and the size of the refrigerating capacity can be flexibly adjusted. Each terminal device can adjust the capacity output according to the self-adjusting range and the number of the terminals in the space, realize accurate regulation and control according to the number and position of the personnel, make the terminal reach the best operation energy efficiency and comfort, realize human-machine-environment interactive collaborative control, and realize dynamic comfortable energy-saving control in a non-uniform space-time environment through mutual communication, autonomous negotiation and automatic optimization adjustment and operation of the terminal devices to accurately regulate and control the terminal cooling capacity.

[0061] Preferably, the priority of the linkage action of the plurality of convection-radiation coupling terminal devices is higher than that of the double-variable flow control strategy, so that when the number of the personnel in the space suddenly changes, the number of the terminal devices in operation can be quickly adjusted to effectively change the environmental temperature and reduce the discomfort caused by the change of the temperature in the space due to the change of the number of the personnel.

[0062] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "arrangement", "connection", "fixing", "rotation" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by those skilled in the art.

[0063] Although the embodiments of the present application have been shown and described in detail, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A convective-radiative coupling tip device, comprising: The application relates to a heat exchange device and a control method thereof. The heat exchange device comprises a radiation heat exchange component, a convection heat exchange component and a water mixing component. The radiation heat exchange component comprises a radiation heat exchange plate provided with uniformly distributed micro-hole structures, and a return air panel provided on the periphery of the radiation heat exchange plate and provided with a supply air outlet and a return air outlet surrounding the supply air outlet. The convection heat exchange component comprises a convection heat exchange pipe. The air exchange component is used for driving air flow to return air through the return air outlet, to exchange heat through the convection heat exchange component and the radiation heat exchange component, and to supply air from the supply air outlet. The convection heat exchange pipe and the radiation heat exchange pipe in the radiation heat exchange plate are respectively connected with a water mixing processor in the water mixing component. The water mixing processor is connected with an external main pipe through a water outlet pipe component.

2. A device for coupling to a flow of radiant energy as defined in claim 1, wherein, The convection heat exchange pipe is connected with the external main pipe through a water inlet pipe component.

3. A control method for the convective-radiative coupling tip device according to any one of claims 1-2, characterized in that, The water mixing processor is provided with a water inlet connected with the end of the convection heat exchange pipe, and a water mixing water inlet and a water mixing water outlet connected with the radiation heat exchange pipe. The convection heat exchange pipe is installed in a heat exchanger provided with an installation cavity.

4. The control method of claim 3, wherein The radiation heat exchange plate and the return air panel are respectively arranged above the heat exchanger.

5. The control method of claim 4, wherein The radiation heat exchange pipe is horizontally arranged in the radiation heat exchange plate.

6. The control method of claim 5, wherein The convection heat exchange pipe is vertically arranged in the heat exchanger. The opening of the proportional water valve connected with the radiant heat exchange plate and the convection heat exchange tube is adjusted to regulate the refrigerant flow in the radiant heat exchange plate and the convection heat exchange tube; wherein the method for adjusting the opening of the proportional water valve comprises: calculating the proportional water valve opening increment D = the target air outlet temperature value - the actual air outlet temperature value, the proportional water valve adjustment step size = When , the proportional water valve is adjusted to be larger When D < 0, the proportional water valve is adjusted to be smaller If the actual proportional water valve opening increment , the adjustment is performed in a step size of 5% at most.

7. A control method according to any one of claims 3 to 6, wherein, The control method comprises the following steps. Setting an indoor temperature target value, adjusting the rotating speed of the fan of the air exchange component according to the indoor temperature target value, calculating an air temperature target value according to the indoor temperature target value, and adjusting the refrigerant flow in the radiation heat exchange plate and the convection heat exchange pipe according to the air temperature target value. The method for adjusting the rotating speed of the fan of the air exchange component according to the indoor temperature target value comprises the following steps. Detecting the environmental temperature value in the room, calculating the required air volume according to the difference between the indoor temperature target value and the environmental temperature value, calculating the motor operating frequency according to the required air volume, and operating the motor at a constant rotating speed according to the obtained operating frequency. Detecting the environmental temperature at a set time interval, and then repeatedly executing the above steps until the environmental temperature value is equal to the indoor temperature target value. The method for calculating the air temperature target value according to the indoor temperature target value comprises the following steps. The control method comprises the following steps. The convection-radiation coupling end devices in the same space are provided with a plurality of control systems and are respectively connected with the control systems. The control system adjusts the operating number of the convection-radiation coupling end devices in the space according to the number and position of the indoor personnel, and adjusts the refrigeration capacity.

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