CN203837184U - Active type radiant panel heat exchange system - Google Patents

Abstract

The utility model provides an active radiant plate heat exchange system. The active radiant plate heat exchange system integrates radiation heat exchange and active convection heat exchange. For heat exchange, the fan can also be used to actively force convective heat exchange to heat/cool the air, and can increase the temperature difference between the supply and return water of the radiant plate, thereby helping to improve its heat exchange efficiency and enhance the cooling/cooling of the radiant plate heat exchange system. The heat supply capacity solves the problem that the cooling and heating capacity of the radiant panel system in the prior art is limited and it is difficult to widely popularize and apply it, and it can also eliminate a certain humidity load while processing the fresh air and return air, improving It eliminates the shortcomings of traditional radiation systems that cannot dehumidify. The active radiant plate heat exchange system of the utility model provides a new solution for the radiant plate air-conditioning system, and has broad market application prospects.

Description

Active radiant plate heat exchange system

technical field

The utility model relates to the technical field of air conditioning, in particular to an active radiation plate heat exchange system.

Background technique

The radiant panel is a flat plate-shaped HVAC equipment, which heats or cools the working elements to achieve the purpose of thermal radiation heating or cold radiation cooling to the surrounding environment. Classified by function, it can be divided into hot radiant panels and cold radiant panels. The medium used for heating mainly includes hot water, steam, gas, fuel oil, electricity, etc., and the medium used for cooling mainly includes cold water, evaporating agent (freon, liquid ammonia), etc.

Compared with the traditional air convection air conditioning system, the radiant panel system is mainly based on radiation heat exchange, and the vertical temperature difference is relatively small, which helps to improve the comfort of indoor use, and there is no use of air convection air conditioning system At the same time, the radiant panel system can also use hot water and cold water as the medium for heating and cooling, which can greatly reduce energy consumption.

Although the advantages of the radiant panel system are outstanding, it also has its own limitations. In the existing radiant panel system, the cooling temperature in summer should not be too low, generally 16-18°C. If the cooling temperature is too low, the radiant panel will generate condensation, which will affect the indoor hygienic conditions. The area cooling and heat exchange capacity is low, and the cooling efficiency is not good; in winter, although there is no problem of condensation, due to the limitation of radiation heating heat exchange efficiency and comfort requirements, the heating temperature should not be too high, generally 26-32°C, otherwise the heat energy of too high temperature will accumulate in the radiant panel because it cannot be completely radiated outward, which will easily accelerate the aging of internal components, shorten the service life, and reduce the comfort. Therefore, the lack of cooling and heating capacity makes it difficult for the radiant panel system to meet the demand for large cooling and heating loads, which greatly limits the promotion and application of the radiant panel system in more regions and fields.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide an active radiant plate heat exchange system that can be used for heating and cooling, and helps to enhance the cooling and heating capacity, so as to solve the existing problems. There is a problem that the cooling and heating capacity of the radiant panel system in the technology is limited, and it is difficult to be widely popularized and applied.

In order to solve the problems of the technologies described above, the utility model adopts the following technical means:

An active radiant plate heat exchange system, comprising a radiant plate installed on an indoor roof or wall; the radiant plate has a flat heat exchange cavity, and the bottom surface of the heat exchange cavity is a radiant surface; the heat exchange The top surface of the inner cavity of the cavity is laid with an insulating material layer; the bottom surface of the inner cavity of the heat exchange cavity is laid with a number of water exchange pipes arranged in parallel to each other, and the heat exchange pipes are connected with the insulating material layer on the top surface of the inner cavity of the heat exchange cavity. There is a ventilation gap between them; one end of each water exchange pipe in the heat exchange chamber is respectively connected with the water supply pipe, and the other end is connected with the return water pipe respectively, and the water supply pipe and the return water pipe are respectively connected from the opposite sides of the heat exchange chamber. The wall extends out of the side surface of the radiant plate; the bottom surface of the inner cavity in the heat exchange cavity is located on both sides of each water exchange pipe, and drainage grooves are arranged along the extending direction of the water exchange pipe, and the bottom surface of the inner cavity is located on the water supply pipe. Condensed water guide grooves are respectively arranged along the extension direction of the water supply pipe and the return water pipe at the positions away from the side of the water exchange pipe; the drainage groove is connected with the condensed water guide groove, The groove guide is connected to the condensate drain pipe located at the bottom of the side wall of the heat exchange chamber and close to the position where the water supply pipe extends out of the radiant plate, and the drainage groove and the condensate guide groove have a direction to the condensate from the position where the return pipe extends out of the radiant plate. The inclined slope at the position of the water drainage pipe; the side wall of the heat exchange chamber near the return pipe is also provided with an air inlet of the heat exchange chamber, and the side wall near the side of the water inlet pipe is also provided with an outlet of the heat exchange chamber. tuyere;

It also includes a return air passage; the return air passage uses the return air intake pipe communicated with the room and the fresh air intake pipe communicated with the outside world as the entrance, and both the return air intake pipe and the fresh air intake pipe pass through the intake pipe provided with an air filter and a fan. The air duct is connected to the air inlet of the heat exchange chamber of the radiant plate, and after passing through the ventilation gap of the radiant plate, it is connected from the air outlet of the heat exchange chamber of the radiant plate to the air supply outlet pipe connected to the room; the fan is used to drive the return air The airflow in the passage flows to the air outlet pipe; the return air inlet pipe and the fresh air inlet pipe are respectively provided with a return air regulating valve and a fresh air regulating valve.

On the basis of the above-mentioned active radiant plate heat exchange system, as a further preferred solution, the water exchange pipe is hollow and semi-cylindrical, and its semi-cylindrical flat surface is laid in the heat exchange cavity cavity bottom.

On the basis of the above-mentioned active radiant plate heat exchange system, as a further improvement, the insulating material layer on the top surface of the inner cavity of the heat exchange chamber of the radiant plate is also coated with a reflective material layer on the side facing the heat exchange pipe.

On the basis of the above-mentioned active radiant plate heat exchange system, as a further preferred solution, the slope value of the drainage groove and the condensed water guiding groove extending from the position of the radiant plate to the position of the condensed water drain pipe from the return pipe 1%~2%.

On the basis of the above-mentioned active radiant plate heat exchange system, as a further preferred solution, both the return air regulating valve and the fresh air regulating valve adopt electric split multi-leaf regulating valves.

On the basis of the above active radiant plate heat exchange system, as a further improvement, the water supply pipe of the radiant plate is further provided with a flow control valve.

Compared with the prior art, the utility model has the following beneficial effects:

1. The existing radiant cooling (heat) system must be combined with a specific form of mechanical ventilation. The active radiant plate heat exchange system of the utility model can process fresh air, eliminating the need for an independent fresh air processing system, which can reduce the traditional The initial investment of the radiant cooling (heating) system has the characteristics of one system with multiple functions.

2. The active radiant plate heat exchange system of the present invention can eliminate certain humidity load while processing the fresh air and return air, which improves the disadvantage that the traditional radiant system cannot dehumidify.

3. The active radiant plate heat exchange system of this utility model is combined with the wind system, and the heat exchange efficiency of the radiant plate is improved by strengthening the convective heat exchange, and the cooling capacity (heat supply) is increased, so that it has a better Cooling (heating) effect; and it can increase the temperature difference between the supply and return water of the radiant plate, improve the cooling (heating) efficiency of the cold and heat source unit, and achieve the purpose of energy saving.

Description of drawings

Fig. 1 is a structural schematic diagram of the active radiant plate heat exchange system of the present invention.

Fig. 2 is a cross-sectional view showing the specific structure of the radiant plate in the active radiant plate heat exchange system of the present invention.

Fig. 3 is an A-A sectional view of the radiation plate shown in Fig. 2 .

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

The utility model provides an active radiant plate heat exchange system, which integrates radiation heat exchange and active convective heat exchange, not only can conduct heat exchange with the environment through radiation, but also can actively enhance its convective heat exchange through fans. Heating/cooling the air, thereby helping to improve its heat exchange efficiency and enhancing the cooling/heating capacity of the radiant plate heat exchange system.

The overall structure of the active radiant plate heat exchange system of the present invention is shown in Figure 1, which is mainly composed of the return air passage formed by the radiant plate 10, the air filter 20, the fan 30 and so on.

Wherein, the radiant panel is installed on the indoor roof or wall, and the specific structure of the radiant panel is shown in Fig. 2 and Fig. 3, wherein Fig. 3 is an A-A sectional view of the radiant panel shown in Fig. 2 . The radiant plate 10 has a flat heat exchange cavity 11, the bottom surface of the heat exchange cavity 11 is a radiation surface; the inner cavity top surface of the heat exchange cavity 11 is laid with an insulating material layer 12; The upper bunk is provided with a number of heat exchange pipes 13 arranged in parallel to each other, and there is a ventilation gap 14 between the heat exchange pipes 13 and the insulation material layer 12 on the top surface of the heat exchange chamber; each heat exchange pipe in the heat exchange chamber 11 One end of the water pipe 13 is respectively connected with the water supply pipe 15, and the other end is respectively connected with the return water pipe 16, and the water supply pipe 15 and the return water pipe 16 respectively extend from the opposite side walls of the heat exchange chamber 11 to the side surface of the radiant plate 10 ; The bottom surface of the inner cavity in the heat exchange cavity 11 is located at the positions on both sides of each water exchange pipe 13 and is provided with drainage grooves 17 along the extending direction of the water exchange pipes. Condensed water guide grooves 18 are provided on one side of the water exchange pipe 13 along the extension direction of the water supply pipe and the return water pipe respectively; the drainage groove 17 is connected to the condensed water guide groove 18 and is guided It is connected to the condensed water drain pipe 19 located at the bottom of the side wall of the heat exchange chamber 11 and close to the position where the water supply pipe extends out of the radiant plate, and the drainage groove 17 and the condensed water guide groove 18 have a position where the return pipe extends out of the radiant plate The slope inclined towards the position of the condensate drain pipe, the slope value is preferably 1%~2%, so as to facilitate the flow of condensate water to the condensate drain pipe and discharge to the outside of the radiant plate; the heat exchange chamber is close to the return pipe An air inlet 1a of the heat exchange chamber is also provided on the side wall, and an air outlet 1b of the heat exchange chamber is also provided on the side wall near the water inlet pipe. In the radiant plate of the active radiant plate heat exchange system of the utility model, the water is supplied by the water supply pipe and flows through the heat exchange water pipe paved on the bottom surface of the inner cavity of the heat exchange chamber, so that the radiation surface on the ground of the heat exchange chamber forms a heating/ Cooling radiation, and then the water flows out from the return pipe; during this process, the airflow entering the return air passage also enters the heat exchange cavity of the radiant plate from the air inlet of the heat exchange cavity of the radiant plate, flows through the ventilation gap, and flows from the heat exchanger of the radiant plate The air outlet of the hot chamber flows out to the air outlet pipe. The ventilation gap between the heat exchange water pipe in the heat exchange chamber of the radiant plate and the insulation material layer on the top surface of the heat exchange chamber is equivalent to a heat exchange space, and the air flows in this ventilation gap. It conducts convective heat exchange with the heat exchange pipe, and then flows out to the air outlet pipe to be sent to the room, thereby increasing the heat exchange capacity and heat exchange efficiency of the radiant plate; the reason why the air inlet of the heat exchange chamber is set near the return chamber On the side wall of the water pipe side, the air outlet of the heat exchange chamber is arranged on the side wall of the heat exchange chamber close to the water inlet pipe. The direction of the water flow is opposite, forming a countercurrent convective heat exchange, so as to increase the efficiency of convective heat exchange in the radiant plate as much as possible; at the same time, the bottom surface of the inner cavity in the radiant plate heat exchange cavity is also provided with interconnected drainage grooves and condensation The water guide groove is connected to the condensate drain pipe by the guide groove of the condensed water guide, so that the condensed water generated by the condensation of the water supply pipe, the return pipe and the heat exchange pipe during the heat exchange can enter the drain groove and the condensed water guide The condensed water is diverted to the condensed water drain pipe for discharge with the help of the drainage groove and the slope of the condensed water guide groove, so as to solve the problem of condensation on the radiant plate, and in the cooling process, it flows through the radiant plate through the return air path The convective air in the heat exchange chamber exchanges heat with the heat exchange pipe to produce water vapor condensation, which reduces the moisture content of the air sent into the room from the air outlet pipe, thereby helping to eliminate the indoor humidity load.

As a preferred solution, the heat exchange pipes in the radiant plate are in the shape of a hollow semi-cylindrical tube, and the flat surface of the semi-cylindrical tube is laid on the bottom surface of the inner cavity of the heat exchange cavity. Compared with the commonly used circular water pipes, the semi-cylindrical water exchange pipes can increase the contact area between the water and the radiating surface, and save the intermediate heat transfer medium, which is more conducive to the transfer of cold and heat between the water and the radiating surface , with higher heat transfer efficiency.

As a further preferred solution, the insulating material layer on the top surface of the inner cavity of the heat exchange cavity of the radiant plate is further coated with a reflective material layer on the side facing the heat exchange pipe. The reflective material used in the reflective material layer may be barrier heat-insulating paint, heat-reflective heat-insulating nano-coating, radiation heat-insulating paint aluminum foil, and the like. The reflective material layer is used to reduce the radiation of cold heat from the water pipe to the direction of the insulation layer, and attenuate the transmission of cold heat to the direction of the insulation layer, thereby further helping to improve the radiation heat transfer performance of the radiant plate.

The return air passage in the system is shown in Figure 1, with the return air intake pipe 41 communicating with the room and the fresh air intake pipe 42 communicating with the outside as the entrance, the return air intake pipe 41 and the fresh air intake pipe 42 are equipped with air filter The air inlet pipe 40 of the device 20 and the fan 30 is connected to the air inlet 1a of the heat exchange chamber of the radiant plate 10. The air outlet pipe 50; the fan 30 is used to drive the airflow in the return air passage to the air outlet pipe 50; the return air inlet pipe 41 and the fresh air inlet pipe 42 are also provided with a return air regulating valve 43 and a fresh air regulating valve 44 respectively. Among them, the return air control valve and the fresh air control valve are preferably electric split multi-leaf control valves, so as to facilitate the adjustment of the return air volume of the return air intake pipe and the fresh air volume of the fresh air intake pipe.

The active radiant plate heat exchange system of the utility model can be used for cooling and dehumidification of indoor air in summer, and can be used for heating and heating of indoor air in winter.

In summer, the process of cooling and dehumidifying the indoor air by using the active radiant plate heat exchange system of the present invention is as follows. Feed cold water into the water supply pipe of the radiant plate in the active radiant plate heat exchange system, and the cold water flows through the heat exchange pipes in the heat exchange chamber of the radiant plate, and then flows out from the return water pipe; at the same time, start the fan in the return air path, so that The active radiant heat exchange system starts to work. In this process, the heat exchange between the system and the room is divided into three parts, the first part is the natural convection heat exchange between the outer surface of the radiant panel and the indoor air, the second part is the radiation heat exchange between the radiant panel and the indoor space, and the third part is The indoor and outdoor mixed air passes through the return air path of the system and is sent into the room for forced convection heat exchange and dehumidification at the same time. Among them, the specific process of heat exchange treatment in the third part is: driven by the power of the fan, the indoor return air and the outdoor fresh air with a higher temperature are sucked into the air intake pipe from the return air intake pipe and the fresh air intake pipe respectively to form a mixed air. Air, the mixed air is first filtered by the filter, and then the mixed air enters the ventilation gap of the radiant plate from the air inlet of the heat exchange chamber of the radiant plate, and flows to the air outlet of the heat exchange chamber of the radiant plate, because the air inlet of the heat exchange chamber It is installed on the side of the heat exchange chamber near the return pipe, and the air outlet of the heat exchange chamber is arranged on the side of the heat exchange chamber near the water inlet pipe. Therefore, during the flow of the mixed air in the ventilation gap of the radiant plate, it will interact with the air in the heat exchange pipe. The cold water flow is in a countercurrent convective heat exchange state. At the same time, the water vapor in the mixed air is in contact with the surface of the heat exchange water pipe, and condensation occurs to achieve the purpose of dehumidifying the mixed air. The cooled and dehumidified mixed air is exchanged from the radiant plate After the air outlet of the hot chamber flows out, it is sent into the room through the air outlet pipe to reduce the indoor ambient temperature; and in the process of convective heat exchange between the air mixed in the heat exchange chamber of the radiant plate and the heat exchange pipe, due to the air in the heat exchange chamber The bottom surface of the inner cavity is located on both sides of each water exchange pipe, and drainage grooves are arranged along the extension direction of the water exchange pipe. Condensed water guide grooves are provided in the extension direction of the return pipe and the return pipe, and the drainage groove and the condensed water guide groove have an inclined slope from the position where the return pipe extends out of the radiant plate to the position of the condensed water drain pipe. Therefore, the heat exchange The condensed water produced by the water pipe for the condensation and dehumidification of the mixed gas flows down from the wall of the heat exchange pipe to the drainage grooves on both sides, while the condensed water produced by the water supply pipe and the return pipe for the dehumidification and dehumidification of the mixed gas flows from the water supply pipe. and the pipe wall of the return pipe flow down into the condensed water guide groove on one side, and because the drainage groove and the condensed water guide groove are connected to each other and have an inclined slope, the condensed water is discharged through the drain groove and the condensed water guide groove. Diverts to the condensate drain, through which it exits the radiant panel.

In the specific application process, the active radiant plate heat exchange system of the present invention can control the return air through the return air inlet pipe in the return air passage and the fresh air adjustment valve on the fresh air inlet pipe respectively according to the demand of indoor fresh air. At the same time, a flow control valve can be added to the water supply pipe of the radiant plate in the active radiant plate heat exchange system of the present invention, so that the radiant plate can be changed by adjusting the flow control valve according to the indoor load. In order to achieve the purpose of adjusting the cooling capacity.

In winter, the process of using the active radiant plate heat exchange system of the present invention to heat and raise the indoor air is as follows. Feed hot water into the water supply pipe of the radiant plate in the active radiant plate heat exchange system. After the hot water flows through the heat exchange pipes in the heat exchange chamber of the radiant plate, it flows out from the return pipe; at the same time, start the fan in the return air path , let the active radiant heat exchange system start to work. In this process, the heat exchange between the system and the room is divided into three parts, the first part is the natural convection heat exchange between the outer surface of the radiant panel and the indoor air, the second part is the radiation heat exchange between the radiant panel and the indoor space, and the third part is The indoor and outdoor mixed air passes through the return air path of the system and is sent into the room for forced convection heat exchange. Among them, the specific process of heat exchange treatment in the third part is: driven by the power of the fan, the indoor return air and the outdoor fresh air with a lower temperature are sucked into the air intake pipe from the return air intake pipe and the fresh air intake pipe respectively to form a mixed air. Air, the mixed air is first filtered by the filter, and then the mixed air enters the ventilation gap of the radiant plate from the air inlet of the heat exchange chamber of the radiant plate, and flows to the air outlet of the heat exchange chamber of the radiant plate, because the air inlet of the heat exchange chamber It is installed on the side of the heat exchange chamber near the return pipe, and the air outlet of the heat exchange chamber is arranged on the side of the heat exchange chamber near the water inlet pipe. Therefore, during the flow of the mixed air in the ventilation gap of the radiant plate, it will interact with the air in the heat exchange pipe. The hot water flow is in a countercurrent convective heat exchange state. After being heated, the mixed air flows out from the air outlet of the heat exchange chamber of the radiant plate, and is sent into the room through the air outlet pipe to increase the indoor ambient temperature. Since no condensed water is generated during the heating process in winter, there is no need to discharge condensed water.

Through the above overall description of the structure of the active radiant plate heat exchange system of the present invention and the cooling and heating process, it can also be seen that the active radiant plate heat exchange system of the present invention integrates radiation heat exchange and active convection heat exchange into In the process of heat exchange, it can not only exchange heat with the environment through radiation, but also actively force convection heat exchange through the fan to heat/cool the air, and can increase the temperature difference between the supply and return water of the radiant plate, thereby It helps to improve its heat exchange efficiency, enhances the cooling/heating capacity of the radiant plate heat exchange system, and solves the problem of limited cooling and heating capacity of the radiant plate system in the prior art, which makes it difficult to widely popularize and apply it. The active radiant plate heat exchange system of the utility model saves a set of independent fresh air processing system, can reduce the initial investment of traditional radiant cooling (heating) While the wind is being processed, it can also eliminate a certain amount of moisture load, which improves the shortcomings of traditional radiant systems that cannot dehumidify. The active radiant plate heat exchange system of the utility model provides a new solution for the radiant plate air conditioning system, and has broad market application prospects.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that the technical solution of the utility model can be Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the utility model shall be covered by the claims of the utility model.

Claims (6)

1. an active radiant panel heat-exchange system, is characterized in that, comprises radiant panel, and radiant panel is installed on indoor roof or metope; Described radiant panel has a flat heat exchange cavity, and the bottom surface of heat exchange cavity is radiating surface; The inner chamber end face of heat exchange cavity is equipped with adiabator layer; The upper berth, inner chamber bottom surface of heat exchange cavity is sticked and is equipped with the some heat exchanging water pipes that are arranged parallel to each other, and between heat exchanging water pipe and the adiabator layer of heat exchanging chamber intracoelomic cavity end face, leaves ventilation gap; In heat exchange cavity, one end of every heat exchanging water pipe is connected with feed pipe respectively, and the other end is connected with return pipe respectively, and feed pipe extends respectively the side surface of radiant panel with return pipe from the relative two side of heat exchange cavity; The position that is positioned at every heat exchanging water pipe both sides on inner chamber bottom surface in described heat exchange cavity is provided with drain groove along heat exchanging water pipe's bearing of trend, is positioned at feed pipe and return pipe and along the bearing of trend of feed pipe and return pipe, is provided with condensed water direction recess respectively away from the position of heat exchanging water pipe's one side on inner chamber bottom surface; The perforation that is connected with condensed water direction recess of described drain groove, by condensed water direction recess guiding, be communicated to and be positioned at heat exchanging chamber body sidewall bottom and extend the condensate draining pipe of radiant panel position near feed pipe, and drain groove and condensed water direction recess have from return pipe and extend the gradient that radiant panel position tilts to condensate draining pipe position; Described heat exchange cavity, near being also provided with heat exchanging chamber air inlet on the sidewall of return pipe one side, is also provided with heat exchanging chamber air outlet near on the sidewall of water inlet pipe one side;

Also comprise return air path; Described return air path is usingd with the indoor return air air inlet pipe communicating and the new wind air inlet pipe that communicates with the external world as entrance, return air air inlet pipe and new wind air inlet pipe are all communicated to the heat exchanging chamber air inlet of radiant panel by being provided with the intake stack of air cleaner and blower fan, through after the ventilation gap of radiant panel, from the heat exchanging chamber air outlet of radiant panel, be communicated to and the indoor air-supply escape pipe communicating; Described blower fan is for driving the air flow direction air-supply escape pipe of return air path; In described return air air inlet pipe and new wind air inlet pipe, be also respectively equipped with return air control valve and new wind control valve.

2. active radiant panel heat-exchange system according to claim 1, is characterized in that, the semicolumn tubular that described heat exchanging water pipe is hollow, and the flat surface paving of its semicolumn tubular is on the inner chamber bottom surface of heat exchange cavity.

3. active radiant panel heat-exchange system according to claim 1, is characterized in that, the one side towards heat exchanging water pipe on the adiabator layer of the heat exchanging chamber intracoelomic cavity end face of described radiant panel is also coated with layer of reflective material.

4. active radiant panel heat-exchange system according to claim 1, is characterized in that, it is 1% ~ 2% that described drain groove and condensed water direction recess extend from return pipe the gradient value that radiant panel position tilts to condensate draining pipe position.

5. active radiant panel heat-exchange system according to claim 1, is characterized in that, described return air control valve and new wind control valve all adopt the electronic multi-clack control valve of splitting.

6. active radiant panel heat-exchange system according to claim 1, is characterized in that, is also provided with flow control valve on the feed pipe of described radiant panel.