Variable shunting five-constant system

Abstract

The utility model discloses a variable shunting five-constant system, and aims to solve the problem that condensed water is easy to generate in a radiation heat exchange tube in a traditional five-constant system. The system comprises a heat pump, a transmission and distribution module, a radiation heat exchange pipe, a coil pipe inner machine, a high-temperature pipe, a low-temperature pipe, a control valve, a temperature sensor and the like. The method is characterized in that a working medium entering a radiation heat exchange tube is pretreated through a coil pipe inner machine, and the flowing direction of the working medium is intelligently controlled according to the environment temperature and humidity and the working medium temperature. When condensation risks exist, the control valve guides the working medium to the coil pipe inner machine for temperature rise, and the working medium is prevented from entering the radiation heat exchange pipe; and when the condensation risk does not exist, the control valve guides the working medium to the radiation heat exchange tube for refrigeration. The system can effectively prevent condensate water from being generated, improve the comfort level, guarantee the'constant static 'effect, improve the system efficiency, achieve rapid cooling and improve the flexibility and engineering friendliness of the system, and is particularly suitable for secondary transformation of an existing natural water and earth water system.

Description

Technical Field

[0001] The utility model relates to an indoor environment control system, in particular to a variable diversion five-constant system. Background Art

[0002] In the field of contemporary indoor environmental control, the "Five Constant Systems" as an integrated solution is gradually becoming a new benchmark for building environmental engineering. The system cleverly combines the five functions of constant temperature, constant humidity, constant oxygen, constant cleanliness and constant quietness, aiming to create a nearly perfect living space for residents. However, as with any complex system, the optimization of each subsystem faces unique challenges and opportunities.

[0003] In terms of temperature regulation, traditional convection air conditioning systems are gradually giving way to more advanced radiant cooling and heating technologies. This innovative method uses a water circulation system to achieve indoor low temperature difference radiant heat exchange by installing radiant panels on the ceiling, walls or floor of the building. This not only avoids the common "cold air blowing directly" problem of traditional air conditioning systems, but also significantly improves the user's comfort experience. What's more worth mentioning is that this temperature regulation method generates extremely low noise during operation, which coincides with the concept of "constant quiet" in the "five constants".

[0004] However, the radiant panel temperature control technology is not without flaws. In the cooling process, the generation of condensed water has become a thorny technical problem. At present, the solution commonly adopted in the industry is to install a dew point sensor in each room to monitor the dew point of the corresponding room, enhance the sealing of the indoor environment, prevent moisture from entering the room, and use the dehumidification function of the system to deal with these condensed water. However, high-quality sealing requirements put forward higher requirements on materials, which is bound to bring about a substantial increase in costs, and require high-level construction, which will also cause problems such as a long construction period. On the other hand, this method also brings new challenges: when rapid cooling is required, in order to avoid the appearance of visible condensed water, it is often necessary to start a high-power dehumidification device. This not only puts higher requirements on equipment performance, but also the high-power operation has high energy consumption and will inevitably produce a lot of noise, which is contrary to the goal of "constant quietness".

[0005] In order to deal with this problem, some projects have adopted the innovative method of pre-burying the radiation heat exchange tubes directly in the building structure. This design concept can indeed alleviate the problem of condensation water to a certain extent, using the building wall as a buffer to reduce the generation of condensation water. However, this method also inevitably brings new problems: the insulation effect of the wall also reduces the efficiency of radiation temperature control. The heat exchange process first occurs between the pipe and the wall before it affects the indoor environment, which undoubtedly increases the response time and energy consumption of the system.

[0006] What is even more difficult is that in some extreme cases where rapid cooling is required, even with the embedded design, it is still impossible to completely eliminate the possibility of condensation on the wall surface. This may not only affect the indoor aesthetics, but also bring potential safety hazards.

[0007] Another solution is to use two sets of low-temperature working fluid systems, also known as dual cooling source systems. This undoubtedly brings about the problem of increased costs. The dual cooling source systems need to cooperate with their own pipelines and coordinate control, and the difficulty of design and calibration increases exponentially.

[0008] Therefore, in the continuous optimization process of the "Five Constant Systems", how to effectively solve the condensation water problem in radiation temperature control technology while ensuring the overall performance of the system is still a technical difficulty that needs to be overcome. Summary of the invention

[0009] In order to solve the above problems, the utility model provides a variable diversion five-constant system, which can take into account the constant quiet effect under the same system configuration and effectively reduce the possibility of condensation water generation.

[0010] In order to achieve the above-mentioned purpose, the variable split five-constant system designed by the utility model includes a heat pump, a distribution module, a radiation heat exchange tube, a coil internal machine, and a high-temperature tube and a low-temperature tube with a working medium therein. The heat pump is connected to the distribution module through the high-temperature tube and the low-temperature tube, the distribution module is connected to the coil internal machine through the high-temperature tube and the low-temperature tube, the coil internal machine is connected to the radiation heat exchange tube through the high-temperature tube and / or the low-temperature tube, and a control valve is provided on the connecting pipe between the coil internal machine and the radiation heat exchange tube. The characteristic of this structure is that the coil internal machine is used to pre-treat the working medium entering the radiation heat exchange tube, and whether the working medium enters the radiation heat exchange tube is controlled according to the need, thereby avoiding the radiation heat exchange tube from generating condensed water due to refrigeration.

[0011] In order to facilitate the controller to determine whether to control the working medium to enter the radiation heat exchange tube, the coil internal machine is provided with a temperature sensor to monitor the temperature of the working medium after passing through the coil internal machine. The temperature sensor detects the temperature of the working medium after pretreatment by the coil internal machine, and cooperates with the ambient temperature and humidity to determine whether the radiation heat exchange tube may produce condensed water, and then determines whether to control the working medium to enter the radiation heat exchange tube.

[0012] A further solution is that the coil of the distribution module is connected to the coil machine through the first high-temperature tube and the first low-temperature tube, the coil machine is connected to the radiation heat exchange tube through the second low-temperature tube, and the radiation heat exchange tube is connected to the distribution module through the second high-temperature tube. The control valve can selectively control the first low-temperature tube to be connected to the second low-temperature tube after passing through the coil machine or the first low-temperature tube to be directly connected to the first high-temperature tube after passing through the coil machine. Through this solution, not only can a non-working cycle of the radiation heat exchange tube of the distribution module-coil machine-distribution module be formed, but also a cycle of the distribution module-coil machine-radiation heat exchange tube-distribution module can be formed under the control of the control valve.

[0013] Another further solution is that the distribution module coil is connected to the coil machine through the first high temperature pipe and the first low temperature pipe, and the coil machine is connected to the radiation heat exchange pipe through the second low temperature pipe and the second high temperature pipe, and the control valve can selectively control the first low temperature pipe to be connected to the second low temperature pipe after the coil machine and then to be connected to the first high temperature pipe after the radiation heat exchange pipe, or the first low temperature pipe to be directly connected to the first high temperature pipe after the coil machine. Through this solution, the same non-working cycle of the radiation heat exchange pipe of the distribution module-coil machine-distribution module as the above solution can be formed, and the cycle of the distribution module-coil machine-radiation heat exchange pipe-coil machine-distribution module can be formed under the control of the control valve.

[0014] In order to make reasonable automatic control decisions according to actual conditions through the control center, the temperature sensor is connected to the control center signal of the variable diversion five-constant system, and the control center is connected to the control valve signal.

[0015] In order to meet different needs, the radiation heat exchange tube can be set in the air conditioning heat exchange plate; it can also be a radiation heat exchange capillary and set on the indoor roof, such as the heat exchange capillary laid directly on the indoor roof during the secondary renovation or the heat exchange capillary installed directly in the roof during decoration. The same selection and installation can be made for the vertical wall; it can also be set in the indoor floor. That is, the radiation heat exchange tube can be any equipment involved in radiation cooling.

[0016] The control method of the variable split five-constant system of the present application mainly includes the following steps:

[0017] a) Continuously detect the ambient temperature and humidity in the target space;

[0018] b) Continuously detect the temperature of the working fluid to be introduced into the radiation heat exchange tube;

[0019] c) determining whether the temperature of the working fluid to be introduced into the radiation heat exchange tube under the current humidity will cause condensation water to be generated on the radiation heat exchange tube, if condensation water is generated, executing step d), otherwise executing step e);

[0020] d) dehumidifying the environment or simultaneously raising the temperature of the working fluid to be introduced into the radiation heat exchange tube, and then returning to step c);

[0021] e) Continuously control the working fluid to enter the radiation heat exchange tube to cool down the ambient temperature;

[0022] f) Return to step a).

[0023] The characteristic of this method is that it is determined by prior judgment whether to allow the working fluid to enter the radiation heat exchange tube according to the ambient temperature and humidity. The temperature adjustment of the radiation heat exchange tube is started only when it is ensured that no condensed water will be generated, thereby eliminating the possibility of condensed water.

[0024] A further method is that when dehumidifying the environment in step d), the ambient temperature is simultaneously cooled by the coil internal unit, thereby firstly satisfying the cooling demand of the user.

[0025] In order to make the radiation heat exchange tube join the temperature adjustment work as soon as possible, the working medium to be entered into the radiation heat exchange tube comes from the coil internal machine, and the working medium to be entered into the radiation heat exchange tube is heated by the process of cooling the ambient temperature by the coil internal machine in step d). The cooling work of the coil internal machine can not only reduce the ambient temperature, but also increase the low-temperature working medium from the heat pump, so that the working medium in the low-temperature tube is closer to the dew point, thereby reducing the waiting time for the radiation heat exchange tube to work.

[0026] In order to make the function in the coil exit the temperature adjustment work smoothly and achieve the "constant quiet" effect of the five constant systems, further, when step e) is completed, the following steps are performed:

[0027] g) Continuously detect the temperature of the working fluid to be introduced into the coil unit;

[0028] h) determining whether the temperature of the working fluid to be introduced into the coil unit under the current humidity will cause condensation water to be generated on the radiation heat exchange tube, and if condensation water is generated, executing step d), otherwise executing step i);

[0029] i) Stop the operation of the machine inside the coil;

[0030] j) Return to step e).

[0031] By continuously detecting the temperature of the working fluid entering the coil unit, it is determined whether to stop the operation of the coil unit, thereby ensuring that no condensed water is generated during the initial working stage of the radiation heat exchange tube, until the indoor dew point is lower than the target temperature, and finally the coil unit is stopped. The temperature control work is completely completed by the radiation heat exchange tube.

[0032] Of course, it should be noted that under the existing technical conditions, the working mode of the coil unit is not turned on or off. Therefore, as the detected ambient temperature and humidity gradually approach the target value, that is, the dew point temperature calculated based on the ambient temperature and humidity gradually approaches the working fluid temperature after the coil unit is heated, the power of the coil unit is gradually reduced until the coil unit stops running.

[0033] Aiming at the problems that the radiation heat exchange tubes in the existing five-constant system are prone to produce condensed water in the cooling mode, which leads to the need for high-power dehumidification, affects the comfort and "constant quiet" effect, this utility model proposes a variable split five-constant system, the core of which is to improve and optimize the coil internal unit function and system control strategy in the existing five-constant system:

[0034] Function expansion of the coil unit: Make full use of the temperature and humidity regulation functions of the original coil unit in the Wuheng system to enable it to play the role of working fluid pretreatment in the radiation cooling mode.

[0035] When the coil unit is adjusting the temperature and humidity, the temperature of the working medium passing through it will increase and the dew point temperature will be reduced. The utility model utilizes this characteristic and guides the working medium from the heat pump to the coil unit for pretreatment through the control valve to avoid condensation water outside the radiation heat exchange tube.

[0036] Dynamically adjust the working fluid flow direction: By introducing a control valve, the system can intelligently switch the working fluid flow direction according to the ambient temperature and humidity and the working fluid temperature. When the ambient temperature and humidity are high, the working fluid temperature is low, and there is a risk of condensation, the control valve will direct the working fluid to the coil unit for pretreatment to prevent it from entering the radiation heat exchange tube. When the ambient temperature and humidity are low, the working fluid temperature is appropriate, and there is no risk of condensation, the control valve will direct the working fluid to the radiation heat exchange tube for efficient radiation cooling.

[0037] Intelligent control strategy: The system is equipped with temperature and humidity sensors and a control center, which can monitor environmental parameters and working fluid status in real time, and control the operation of valves and coil units according to preset logic.

[0038] The control strategy can dynamically adjust the working fluid flow direction and the working status of the coil unit according to environmental conditions, ensuring that the system operates efficiently while avoiding the generation of condensed water.

[0039] Compared with the existing five-constant system, this technical solution achieves the following technical effects:

[0040] 1. Effectively prevent condensation: By dynamically adjusting the working fluid flow direction and the pre-treatment function of the coil unit, the condensation of the radiation heat exchange tube in the cooling mode is effectively avoided, eliminating the dependence on high-power dehumidification.

[0041] 2. Improve comfort: Radiant heat exchange tubes provide a more uniform and comfortable temperature regulation method, avoiding the cold air blowing and temperature fluctuations of traditional air conditioners. Due to the pretreatment of the coil unit, the radiant heat exchange tubes can participate in the temperature regulation work more quickly, further improving the comfort level.

[0042] 3. Ensure the "constant quiet" effect: avoid the noise caused by high-power dehumidification, achieve the "constant quiet" goal in the five-constant system, and create a quiet and comfortable indoor environment.

[0043] 4. Improve system efficiency: The intelligent control strategy can adjust the working fluid flow direction and the working state of the coil unit according to actual needs, improve the overall efficiency of the system and reduce energy consumption. The pretreatment of the coil unit shortens the start-up time of the radiation heat exchange tube and improves the heat exchange efficiency.

[0044] 5. Take into account rapid cooling: The internal unit of the coil can assist in cooling, meet the user's demand for rapid cooling, and create conditions for the start-up of the radiation heat exchange tube. The optimization of the control strategy better coordinates the coordinated work of the internal unit of the coil and the radiation heat exchange tube.

[0045] 6. Flexible arrangement of radiant heat exchange tubes: Since the condensation water problem is effectively avoided, the radiant heat exchange tubes can be arranged more flexibly in the target environment, such as being installed on the ceiling or wall in the form of silent air conditioning panels, which improves the temperature regulation efficiency and reduces the difficulty of modifying existing projects.

[0046] 7. Improve engineering friendliness: Compared with the solution that requires radiant heat exchange tubes to be set in the building wall, this solution uses radiant heat exchange tubes in the form of silent air conditioning panels, which reduces the requirements for pipeline modification, is easier to integrate with existing building structures, and reduces construction costs and difficulties. It is particularly suitable for secondary renovation. On the basis of the existing sky water and ground water, simply adding a radiation panel composed of radiant heat exchange tubes can realize the five constant systems.

[0047] 8. Simplify system design and transformation: The utility model cleverly utilizes the temperature and humidity adjustment function of the original coil unit in the five-constant system. It only adds a control valve and slightly changes the pipeline connection to achieve rapid start-up and efficient operation of the radiation heat exchange tube, reflecting the "low cost, high return" technical innovation concept, and is also more friendly and convenient for the transformation of the existing five-constant system.

[0048] In summary, the variable split five-constant system proposed in the utility model effectively solves the problem of condensation water in the radiation heat exchange tubes in the traditional five-constant system by cleverly improving and optimizing the functions of the coil internal units and the system control strategy in the existing five-constant system. On the basis of inheriting and carrying forward the advantages of the existing five-constant system, it realizes efficient, comfortable and quiet indoor environment control, better meets the user's needs for the "five-constant" environment, and enhances the flexibility and engineering friendliness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is the first type of piping connection diagram of the main components of the five-constant system of Example 1.

[0050] Figure 2 This is the second piping connection diagram of the main components of the five-constant system in Example 2.

[0051] Figure 3 It is a flow chart of the control method of the variable split five-constant system. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0053] Example 1.

[0054] like Figure 1 As shown, the variable split five-constant system described in this embodiment includes a control center (control panel), a heat pump 1, a buffer energy storage water tank, a distribution module 2, a radiation heat exchange tube 3, a coil unit 4, and a high-temperature tube and a low-temperature tube with a working fluid inside. Of course, for the five-constant system, it should also include fresh air-related components, filtration system-related components, and automatic control-related components, which are not elaborated here. The working fluid is generally water. The high temperature and low temperature in the high-temperature tube and the low-temperature tube are relative concepts, which mainly refer to the temperature difference of the working fluid in the two pipes. In the case of refrigeration, the water inlet pipe is a low-temperature pipe, and the water outlet pipe after heat exchange is a high-temperature pipe.

[0055] The heat pump 1 is first connected to the buffer energy storage water tank through a high-temperature pipe and a low-temperature pipe, and then connected to the distribution module 2. The distribution module 2 is connected to the coil unit 4 through the first high-temperature pipe 6 and the first low-temperature pipe 5. The coil unit 4 is connected to the radiation heat exchange tube 3 through the second high-temperature pipe 8 and / or the second low-temperature pipe 7, and a control valve 9 is provided on the connecting pipe between the coil unit 4 and the radiation heat exchange tube 3. Whether the specific coil unit 4 is connected through the second high-temperature pipe 8 or the second low-temperature pipe 7 or the second high-temperature pipe 8 and the second low-temperature pipe 7 at the same time can be determined according to the actual situation of the project. However, in order to effectively reduce the possibility of generating condensed water, it is generally necessary to ensure that the second low-temperature pipe 7 connects the coil unit 4 and the radiation heat exchange tube 3 together.

[0056] In this embodiment, the coil unit 4 is connected to the radiation heat exchange tube 3 through the second low-temperature tube 7, and the radiation heat exchange tube 3 is directly connected to the distribution module 2 through the second high-temperature tube 8. That is, the working fluid after heat exchange in the radiation heat exchange tube 3 directly flows back to the heat pump 1 through the distribution module 2.

[0057] For convenient control, the control valve 9 can selectively control the first low-temperature pipe 5 to be connected to the second low-temperature pipe 7 after passing through the coil internal machine 4, or the first low-temperature pipe 5 to be directly connected to the first high-temperature pipe 6 after passing through the coil internal machine 4, and a temperature sensor 10 for monitoring the temperature of the working medium after passing through the coil internal machine 4 is provided on the coil internal machine 4. At the same time, the temperature sensor 10 is connected to the control center signal, and the control center is connected to the control valve 9 signal to issue instructions to the control valve 9.

[0058] The radiation heat exchange tubes 3 are multiple and connected in parallel, corresponding to external air-conditioning heat exchange plates that can be directly used indoors, radiation heat exchange capillaries arranged in indoor top building components, radiation heat exchange capillaries arranged in indoor vertical wall building components, and so-called floor heating tubes arranged in indoor bottom plates.

[0059] The specific steps of the control method of the variable split five-constant system described in this embodiment are as follows:

[0060] a) Continuously detect the ambient temperature and humidity in the target space, i.e. indoors;

[0061] b) continuously detecting the temperature of the working fluid to be introduced into the radiation heat exchange tube 3;

[0062] c) determining whether the temperature of the working medium to be introduced into the radiation heat exchange tube 3 under the current humidity will cause condensation water to be generated on the radiation heat exchange tube 3, that is, the relationship between the indoor dew point temperature and the working medium temperature in step b); if condensation water is generated, executing step d); otherwise, executing step e);

[0063] d) Dehumidify the environment or raise the temperature of the working medium to be introduced into the radiation heat exchange tube 3 at the same time. Generally, the time for dehumidification alone is relatively long. Therefore, in this embodiment, the temperature of the working medium to be introduced into the radiation heat exchange tube is raised at the same time, and then the process returns to step c) for another determination.

[0064] e) continuously controlling the working fluid to enter the radiation heat exchange tube 3 to cool down the ambient temperature;

[0065] f) Return to step a).

[0066] Under normal circumstances, the five constant systems can keep the indoor temperature and humidity within a comfortable range when they are running continuously, but they cannot avoid unexpected situations that may cause sudden changes in the indoor temperature and humidity. Therefore, when implementing the control steps, it is required to always monitor the ambient temperature and humidity and always cycle through the above steps.

[0067] In the above control method, the coil unit 4 will take on the work of the return air outlet after the ambient air is dehumidified, and the air after dehumidification will be higher than that before dehumidification, so the coil unit 4 will also take on the work of cooling the dehumidified air. At this time, this cooling work will cause the temperature of the working medium entering the coil unit 4 through the first low-temperature tube 5 to increase. On the other hand, during the initial refrigeration, or when rapid refrigeration is required, the radiation heat exchange tube 3 does not play a temperature adjustment role, and the coil unit 4 needs to start the cooling work first to respond to the user's operation. It will also increase the temperature of the working medium entering the coil unit 4. In this embodiment, it is set that the coil unit 4 is connected to the radiation heat exchange tube 3 through the second low-temperature tube 7, that is, the outlet pipe of the coil unit 4 is connected to the inlet pipe of the radiation heat exchange tube 3. At this time, the temperature of the working medium entering the radiation heat exchange tube 3 has a certain temperature difference compared with the working medium from the heat pump 1, that is, the working medium is closer to the dew point of the environment.

[0068] In order to meet the requirements of "constant temperature" and "constant quietness", the subsequent control method is as follows:

[0069] g) Continuously detecting the temperature of the working fluid to be introduced into the coil internal unit 4;

[0070] h) determining whether the temperature of the working fluid to be introduced into the coil internal unit 4 under the current humidity will cause condensation water to be generated on the radiation heat exchange tube 3, and if condensation water is generated, executing step d), otherwise executing step i);

[0071] i) stopping the operation of the coil internal unit 4;

[0072] j) Return to step e).

[0073] It should be specially noted that when the ambient temperature and humidity are close to the target value, the power of the coil indoor unit 4 is gradually reduced until the operation of the coil indoor unit 4 is stopped.

[0074] Example 2.

[0075] like Figure 2 As shown, the variable split five-constant system described in this embodiment is mainly different from that in Embodiment 1 in that the coil internal unit 4 is connected to the radiation heat exchange tube 3 through the second low-temperature tube 7 and the second high-temperature tube 8. That is, the working fluid after heat exchange in the radiation heat exchange tube 3 continues to flow back to the coil internal unit 4, and then flows back to the heat pump 1 through the first high-temperature tube 6 and the distribution module 2.

[0076] The difference between the control method of the embodiment 1 and that of the embodiment 1 is mainly that in step g): the temperature of the working medium after passing through the coil internal unit 4 is continuously monitored.

[0077] Since the purpose of the control method is to make the working medium temperature entering the radiation heat exchange tube 3 exceed the ambient dew point, as the control process proceeds, the power of the coil internal unit 4 gradually decreases, and the working medium temperature after passing through the coil internal unit 4 will also be close to the initial working medium temperature output by the heat pump 1. Therefore, the effect of this monitoring method will not be much different from the method of Example 1. However, it can reduce one temperature monitoring point and reduce the cost. And when necessary, the result can be obtained by compensation calculation during the judgment calculation, without considering the impact of the temperature errors before and after.

[0078] In addition, it should be further pointed out that the control valve 9 of the present embodiment not only controls opening and closing, but also controls the flow rate of the working fluid, which can continuously make the temperature adjustment process more comfortable, and can also make the conversion process from independent temperature adjustment of the coil unit 4 to combined temperature adjustment of the coil unit 4 and the radiation heat exchange tube 3, and finally to independent temperature adjustment of the radiation heat exchange tube 3 smoother.

[0079] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0080] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a signal connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A variable split five-constant system, comprising a heat pump, a distribution module, a radiation heat exchange tube, a coil internal unit, and a high-temperature tube and a low-temperature tube with a working medium therein, wherein the heat pump is connected to the distribution module through the high-temperature tube and the low-temperature tube, and the distribution module is connected to the coil internal unit through the high-temperature tube and the low-temperature tube, wherein the heat pump is connected to the distribution module through the high-temperature tube and the low-temperature tube, and wherein the heat pump is connected to the coil internal unit through the high-temperature tube and the low-temperature tube. The coil internal unit is connected to the radiation heat exchange tube through a high temperature tube and / or a low temperature tube, and a control valve is provided on the connecting tube between the coil internal unit and the radiation heat exchange tube.

2. The variable split five-constant system according to claim 1 is characterized in that The coil internal machine is provided with a temperature sensor for monitoring the temperature of the working medium after passing through the coil internal machine.

3. The variable split five-constant system according to claim 1 is characterized in that The distribution module coil is connected to the coil internal machine through the first high-temperature pipe and the first low-temperature pipe, the coil internal machine is connected to the radiation heat exchange pipe through the second low-temperature pipe, and the radiation heat exchange pipe is connected to the distribution module through the second high-temperature pipe. The control valve can selectively control the first low-temperature pipe to be connected to the second low-temperature pipe after passing through the coil internal machine or the first low-temperature pipe to be directly connected to the first high-temperature pipe after passing through the coil internal machine.

4. The variable split five-constant system according to claim 1 is characterized in that The distribution module coil is connected to the coil internal machine through the first high-temperature tube and the first low-temperature tube, and the coil internal machine is connected to the radiation heat exchange tube through the second low-temperature tube and the second high-temperature tube. The control valve can selectively control the first low-temperature tube to be connected with the second low-temperature tube after passing through the coil internal machine and then connected with the first high-temperature tube after passing through the radiation heat exchange tube, or the first low-temperature tube to be directly connected with the first high-temperature tube after passing through the coil internal machine.

5. The variable split five-constant system according to claim 2 is characterized by: The temperature sensor is connected to the control center signal of the variable split five-constant system, and the control center is connected to the control valve signal.

6. The variable split five-constant system according to any one of claims 1 to 4, characterized in that The radiation heat exchange tube is arranged in the air conditioning heat exchange plate.

7. The variable split five-constant system according to any one of claims 1 to 4, characterized in that The radiation heat exchange tube is configured as a radiation heat exchange capillary tube and is arranged on the indoor roof.

8. The variable split five-constant system according to any one of claims 1 to 4, characterized in that The radiation heat exchange tube is configured as a radiation heat exchange capillary tube and is arranged in a vertical wall.

9. The variable split five-constant system according to any one of claims 1 to 4, characterized in that The radiation heat exchange tubes are arranged in the indoor floor.

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