Radiation heating system based on multi-split unit

Abstract

The utility model relates to the technical field of radiation air conditioners, in particular to a radiation heating system based on a multi-split unit. The system comprises an outdoor heat source module, a fluorine water heat exchange module and an indoor tail end module. The outdoor heat source module comprises an outdoor main machine of the multi-split unit and a refrigerant circulating pipeline; the fluorine water heat exchange module comprises a fluorine water plate heat exchanger, an expansion valve, a circulating water pump, a radiation tail end water supply pipeline and a radiation tail end water return pipeline; the indoor tail end module comprises a radiation tail end water segregator, a radiation tail end water collector, a fan coil and a radiation plate. A solar auxiliary preheating loop is further integrated, comprises a solar heat collector and a solar water tank, and is used for preheating a water source and reducing operation time and energy consumption of the multi-split air conditioning system. According to the system, the problem of heating discontinuity caused by the heating initial stage and the defrosting mode is solved through the modes of solar preheating, radiant heating and the like, the indoor thermal comfort is improved, and the energy efficiency ratio of the system is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of radiant air conditioners, and particularly relates to a radiant heating system based on a multi-connected unit device. Background Art

[0002] The information disclosed in the background art of the utility model is only intended to increase the understanding of the overall background of the utility model, and is not necessarily regarded as an admission or an indication in any form that this information constitutes the prior art already known to those of ordinary skill in the art.

[0003] With the continuous improvement of people's living quality, the use of variable refrigerant flow multi-split air conditioning systems (referred to as multi-connected unit systems) is becoming more and more popular. It consists of an air source refrigeration or heat pump unit configured with multiple indoor units, and is a direct expansion air conditioning system that adapts to the load changes in the air conditioning area by changing the refrigerant flow. The multi-connected unit adjusts the air in the indoor environment by controlling the frequency conversion operation of the compressor, or changing the number of operating compressors, the number of working cylinders, the opening degree of the throttle valve, etc. to change the refrigerant flow.

[0004] In rural areas and some hot summer and cold winter areas in China, the heating needs of residents are not met through centralized heating. Residents generally use electric heaters and split air conditioners for heating. However, the electric heater has a small scope of action and a large fire hazard; the split air conditioner will cause discontinuous heating due to the defrosting mode, resulting in a decline in indoor thermal comfort. In the prior art, when the multi-connected unit system is used for winter heating, it is greatly affected by the outdoor environment. When the evaporation temperature is too low and the outdoor environment is low temperature and high humidity, the fins of the outdoor unit will frost, the indoor heating effect will decrease, causing intermittent heating and a decline in indoor thermal comfort. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a radiant heating system based on a multi-connected unit device, aiming to solve the problem of the decline in indoor thermal comfort caused by the discontinuity of heating during the initial operation of the heating system and the defrosting mode.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A radiant heating system based on a multi-connected unit device includes an outdoor heat source module, a fluorine-water heat exchange module, and an indoor terminal module. The outdoor heat source module includes the outdoor host of the multi-connected unit device and a refrigerant circulation pipeline. The fluorine-water heat exchange module includes a fluorine-water plate heat exchanger, an expansion valve, a circulation water pump, a radiant terminal supply water pipeline, and a radiant terminal return water pipeline;

[0008] The indoor terminal module includes a radiant terminal water distributor, a radiant terminal water collector, a fan coil unit, and a radiant panel;

[0009] The outdoor main unit of the multi-connected unit is connected to the fluorine-water plate heat exchanger and the fan coil through a refrigerant circulation pipeline;

[0010] The fluorine-water heat exchange module is connected to the radiation panel through a radiation terminal water supply pipeline and a radiation terminal water return pipeline;

[0011] The radiation terminal water supply pipeline and the radiation terminal water return pipeline are respectively connected to a radiation terminal water distributor and a radiation terminal water collector;

[0012] The radiation terminal water return pipeline is communicated with a solar energy assisted preheating circuit through a corresponding pipeline and valve assembly, so as to preheat the water sent into the fluorine-water plate heat exchanger first, and then enter the radiation panel after heat exchange in the fluorine-water plate heat exchanger.

[0013] Preferably, the solar energy assisted preheating circuit includes a solar collector and a solar water tank. The solar collector is used to absorb solar heat energy, and the water in the solar water tank is heated by a circulating water pump and then sent into the fluorine-water heat exchanger.

[0014] Preferably, the radiation terminal water distributor and the radiation terminal water collector are both provided with corresponding exhaust valves and stop valves.

[0015] Preferably, the radiation terminal water distributor is provided with a filter and a temperature and pressure gauge.

[0016] Preferably, the radiation panel includes a floor radiation type, a side wall radiation type and a ceiling radiation type.

[0017] The utility model includes but is not limited to the following beneficial effects:

[0018] Through the solar energy preheating system, the utility model can reduce the defrosting requirement of the multi-connected unit system in a low-temperature and high-humidity environment, thereby avoiding the heating interruption caused by defrosting and improving the heating continuity. At the same time, compared with the traditional convection heating, the combination of the radiation heating method and the convection heating can provide a more uniform indoor temperature distribution, reduce the phenomenon of uneven heating and cooling, and thus improve the thermal comfort of the occupants.

[0019] The integrated solar energy preheating system of the utility model can utilize renewable solar energy as a free heat source to preheat the water supply, which is environmentally friendly and energy-saving, reduces the operation time of the multi-connected unit system, and thus reduces the energy consumption and operation cost. Further, the utility model can also be combined with intelligent control, and is automatically adjusted by an intelligent control system according to the efficiency of the solar collector and the indoor temperature demand, further improving the energy efficiency ratio of the system, and thus further reducing the energy consumption and operation cost.

[0020] The utility model has various radiation forms, that is, the radiation panel can adopt various forms such as floor radiation, side wall radiation, and ceiling radiation. This enables the system to flexibly select the most suitable heating method according to different building structures and requirements, enhancing the flexibility of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the system structure of the utility model Figure 1 ;

[0022] Figure 2 is a schematic diagram of the system structure of the utility model Figure 2 .

[0023] The reference numerals are as follows:

[0024] 1. Outdoor main unit; 2. Fluorine-water plate heat exchanger; 3. Radiation panel; 4. Fan coil unit; 5. Expansion valve; 6. Radiation terminal water distributor; 7. Stop valve; 8. Filter; 9. Temperature and pressure gauge; 10. Exhaust valve; 11. Radiation terminal water collector; 12. Refrigerant circulation pipeline; 13. Circulation water pump; 14. Solar energy assisted preheating circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes the utility model in conjunction with specific embodiments and the drawings.

[0026] Figure 2 A radiation heating system based on a multi-connected unit device is shown, which includes an outdoor heat source module, a fluorine-water heat exchange module, and an indoor terminal module. The outdoor heat source module includes the outdoor main unit 1 of the multi-connected unit device and the refrigerant circulation pipeline 12. The fluorine-water heat exchange module includes a fluorine-water plate heat exchanger 2, an expansion valve 5, a circulation water pump 13, a radiation terminal water supply pipeline, and a radiation terminal water return pipeline;

[0027] The indoor terminal module includes a radiation terminal water distributor 6, a radiation terminal water collector 11, a fan coil unit 4, and a radiation panel 3;

[0028] The outdoor main unit 1 of the multi-connected unit device is connected to the fluorine-water plate heat exchanger 2 and the fan coil unit 4 through the refrigerant circulation pipeline 12;

[0029] The fluorine-water heat exchange module is connected to the radiation panel 3 through the radiation terminal water supply pipeline and the radiation terminal water return pipeline;

[0030] The radiation terminal water supply pipeline and the radiation terminal water return pipeline are respectively connected to the radiation terminal water distributor 6 and the radiation terminal water collector 11;

[0031] As Figure 1As shown, the return pipe of the radiation terminal is also connected to a solar-assisted preheating circuit 14 through a corresponding pipeline and valve assembly to preheat the water sent into the fluorine-water plate heat exchanger 2 first, and then enter the radiation panel 3 after heat exchange in the fluorine-water plate heat exchanger 2. The radiation panel 3 includes a floor radiation type, a side wall radiation type, and a ceiling radiation type.

[0032] Among them, the radiation terminal water distributor 6 and the radiation terminal water collector 11 are both provided with corresponding exhaust valves 10 and stop valves 7; the radiation terminal water distributor 6 is provided with a filter 8 and a temperature and pressure gauge 9. When the heating season comes, debugging is required to discharge the gas in the pipeline to ensure the normal operation of the heating system; each of the radiation terminal water distributor 6 and the radiation terminal water collector 11 is provided with a stop valve 7 for easy system maintenance; the radiation terminal water distributor 6 is installed with a filter 8 to filter impurities in the water and prevent pipeline blockage from affecting the heating effect; the radiation terminal water distributor 6 is installed with a temperature and pressure gauge 9 to facilitate users and maintenance personnel to judge whether the heating system is normal.

[0033] In the above structure, the indoor terminals are the fan coil unit 4 and the radiation panel 3 respectively. At the initial stage of the operation of the heating system, due to the heat storage effect of the radiation terminal water system, the indoor temperature will not rise significantly. At this time, the fan coil unit 4 can be turned on to preheat the indoor space. When the power of the multi-connected outdoor main unit 1 increases, the radiation terminal water distributor 6, the radiation terminal water collector 11, and the circulating water pump 13 can be turned on.

[0034] In the above structure, if the multi-connected outdoor main unit 1 stops running due to the defrosting mode, due to the heat storage effect of the radiation terminal water system, the radiation panel 3 still provides heating for the indoor space, and the system has high reliability.

[0035] Among them, the solar-assisted preheating circuit 14 includes a solar collector and a solar water tank. The solar collector is used to absorb solar heat energy and send the water in the solar water tank into the fluorine-water heat exchanger after being heated by the circulating water pump 13. Specifically, it includes the following two processes:

[0036] Solar preheating: The solar collector collects solar energy and converts it into heat energy to heat the water in the solar water tank. The hot water in the solar water tank is transported to the fluorine-water plate heat exchanger 2 through a circulating pump as a preheating source.

[0037] Radiant heating: The preheated water is further heated by the fluorine-water plate heat exchanger 2 and then transported to the radiation panel 3 through the radiation terminal water supply pipeline. The radiation panel 3 transfers heat to the indoor space in a radiant manner to provide a comfortable heating experience.

[0038] The radiant heating system based on the multi-connected unit combines the multi-connected unit system with the radiant air-conditioning system and is supplemented by a plate heat exchanger. Compared with the traditional heating system, the utility model realizes the transformation of the heat transfer mode between the human body and the indoor environment, from the traditional convective heat transfer to the radiant heat transfer with better comfort, and solves the problem of the decline in indoor thermal comfort caused by the discontinuity of heating during the initial operation of the heating system and the defrosting mode. By integrating the solar preheating system, the operation time and energy consumption of the multi-connected unit system are reduced, the overall energy efficiency ratio of the system is improved, the flexibility and economy of the system are enhanced, and the concept of sustainable development is also reflected.

[0039] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0040] Terms such as "upper", "lower", "outer side", "inner side", etc. in the specification, claims and the above-mentioned drawings of the present utility model, if any, are used to distinguish the relative relationship in position and do not need to be given a qualitative definition. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radiant heating system based on a multi-connected unit device, comprising an outdoor heat source module, a fluorine-water heat exchange module, and an indoor terminal module. The outdoor heat source module includes the outdoor host of the multi-connected unit device and a refrigerant circulation pipeline. The fluorine-water heat exchange module includes a fluorine-water plate heat exchanger, an expansion valve, a circulation water pump, a radiant terminal supply water pipeline, and a radiant terminal return water pipeline. It is characterized in that: The indoor terminal module includes a radiant terminal water distributor, a radiant terminal water collector, a fan coil unit, and a radiant panel; The outdoor host of the multi-connected unit device is connected to the fluorine-water plate heat exchanger and the fan coil unit through a refrigerant circulation pipeline; The fluorine-water heat exchange module is connected to the radiant panel through a radiant terminal supply water pipeline and a radiant terminal return water pipeline; The radiant terminal supply water pipeline and the radiant terminal return water pipeline are respectively connected to the radiant terminal water distributor and the radiant terminal water collector; The radiant terminal return water pipeline is communicated with a solar energy assisted preheating circuit through a corresponding pipeline and valve assembly, so as to preheat the water sent into the fluorine-water plate heat exchanger first, and then enter the radiant panel after heat exchange in the fluorine-water plate heat exchanger.

2. The radiant heating system based on a multi-connected unit device according to claim 1, characterized in that: The solar energy assisted preheating circuit includes a solar collector and a solar water tank. The solar collector is used to absorb solar heat energy and send the water in the solar water tank heated by a circulation water pump into the fluorine-water heat exchanger.

3. The radiant heating system based on a multi-connected unit device according to claim 1, characterized in that: Both the radiant terminal water distributor and the radiant terminal water collector are provided with corresponding exhaust valves and stop valves.

4. The radiant heating system based on a multi-connected unit device according to claim 1, characterized in that: The radiant terminal water distributor is provided with a filter and a temperature and pressure gauge.

5. The radiant heating system based on a multi-connected unit device according to any one of claims 1 to 4, characterized in that: The radiant panel includes a floor radiant type, a side wall radiant type, and a ceiling radiant type.

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