Water communication device for fresh air ventilator and fresh air ventilator system comprising same

Abstract

According to the water communicating device for the fresh air ventilator and the fresh air ventilator system comprising the water communicating device, in the water communicating device, a cold source is connected with a pre-cooling heat exchanger, the pre-cooling heat exchanger cools fresh air so as to achieve temperature rise of cold water, and the cold water obtained after temperature rise is input into a reheating heat exchanger so that the dehumidified fresh air can be reheated continuously. According to the scheme, cold water output by the cold source is matched with the temperature needed by fresh air reheating, water output by the pre-cooling heat exchanger can be directly used for the reheating heat exchanger, and due to the fact that the reheating heat exchanger needs to heat fresh air, the water temperature in the reheating heat exchanger can be reduced. In this way, water output by the reheating heat exchanger can be directly used for absorbing condensation heat generated by cooling and dehumidification. According to the scheme, the multiple purposes of fresh air cooling, reheating after dehumidification, condensation heat recovery and the like can be achieved by fully utilizing the water communication device. The cold source outputs water which is high in temperature and meets the fresh air reheating requirement, the energy efficiency utilization rate of the cold source is improved, and the system energy consumption of the whole fresh air machine can be reduced.

Description

Technical Field

[0001] This application relates to the field of building heating, ventilation and air conditioning technology, specifically to a water connection device for a fresh air unit and a fresh air unit system including the same. Background Technology

[0002] A fresh air system is an effective air purification device that can circulate indoor air. On the one hand, it expels polluted indoor air to the outside, and on the other hand, it introduces fresh outdoor air into the room after sterilization, disinfection, and filtration, ensuring that the room is always filled with fresh and clean air.

[0003] Specifically, such as Figure 1 As shown, the fresh air unit has independent air intake duct 2 and exhaust duct 3. Air intake duct 2 filters outdoor air and adjusts its temperature and humidity to deliver suitable fresh air into the room. Exhaust duct 3 collects indoor air, filters it, and then exhausts it outdoors. Air intake duct 2 includes a fresh air filtration section 21, a dehumidification and reheating section 22, an enthalpy-increasing humidification section 23, and a supply air section 24 connected in sequence. Exhaust duct 3 includes an exhaust air filtration section 31, a humidification water tank section 32, an exhaust air condensation section 33, and an exhaust section 34 connected in sequence. In the above scheme, the dehumidification and reheating section requires lower-temperature water to ensure the supply air humidity meets the air dew point temperature requirements. To meet the temperature requirements of the incoming fresh air, the dehumidification and reheating section also requires higher-temperature water to heat the excessively cold fresh air. However, existing fresh air units use only one cold source, which can only output chilled water according to a specific need, usually using a lower-temperature water source based on the dehumidification requirement.

[0004] Therefore, in existing technologies, the cold source water does not involve fresh air reheating during the circulation process. Fresh air reheating requires using a heat exchanger to replace the lower-temperature water with higher-temperature water before it is used to heat the subcooled fresh air. During the operation of the aforementioned water connection device, the energy efficiency of the cold source is significantly low. Summary of the Invention

[0005] The technical problem to be solved by this application is that the cold source energy efficiency of the water connection device for fresh air units is low in the prior art. Therefore, this application provides a water connection device for fresh air units and a fresh air unit system including the device that can simultaneously meet the needs of fresh air dehumidification and reheating by only outputting water at a higher temperature.

[0006] In a first aspect, the technical solution of this application provides a water connection device for a fresh air unit, comprising:

[0007] A cold source is used to output chilled water at a set temperature, which is matched with the temperature required for fresh air reheating.

[0008] a pre-cooling heat exchanger, an input end of which is connected with the cold source through a first pipeline, the pre-cooling heat exchanger being arranged upstream of the dehumidification evaporator along the air flow direction in the air inlet channel;

[0009] a reheating heat exchanger, an input end of which is connected with the output end of the pre-cooling heat exchanger through a second pipeline, the reheating heat exchanger being arranged downstream of the dehumidification evaporator along the air flow direction in the air inlet channel;

[0010] a fluorine-water plate exchanger, an input end of which is connected with the reheating heat exchanger through a third pipeline, and an output end of which is connected with the cold source.

[0011] In some schemes, the water communication device for the fresh air machine further comprises:

[0012] the water channel in the fluorine-water plate exchanger is connected with the reheating heat exchanger and the cold source.

[0013] In some schemes, the water communication device for the fresh air machine, the second pipeline is provided with a flow control valve.

[0014] In some schemes, the water communication device for the fresh air machine, the pre-cooling heat exchanger and the reheating heat exchanger are both in the form of a coil.

[0015] In some schemes, the water communication device for the fresh air machine further comprises:

[0016] a circulating pump arranged at the output port of the cold source.

[0017] In the second aspect, the technical scheme of the present application provides a fresh air machine system comprising the water communication device for the fresh air machine according to any one of the first aspect.

[0018] In some schemes, the fresh air machine system, the pre-cooling heat exchanger and the reheating heat exchanger are arranged in the dehumidification and reheating section of the air inlet channel of the fresh air machine system.

[0019] In some schemes, the fresh air machine system, the exhaust air condenser is arranged in the exhaust air condensing section of the exhaust air channel of the fresh air machine system.

[0020] In some schemes, the fresh air machine system, the exhaust air condensing section of the exhaust air channel is provided with a compressor.

[0021] The refrigerant circulates among the compressor, the exhaust air condenser, the fluorine channel of the fluorine-water plate exchanger, and the dehumidification evaporator in the dehumidification and reheating section.

[0022] In some schemes, the fresh air machine system, an expansion valve is arranged between the dehumidification evaporator and the compressor.

[0023] Compared with the prior art, the above technical scheme provided by the present application has the following technical effects:

[0024] The water communication device for the fresh air machine and the fresh air machine system comprising the same provided by the application connect the cold source and the pre-cooling heat exchanger, the pre-cooling heat exchanger cools the fresh air to realize the temperature rise of the cold water, and the cold water after the temperature rise is input to the reheating heat exchanger to continue reheating the fresh air after the dehumidification. On this basis, the cold water output by the cold source matches the temperature required by the reheating of the fresh air, specifically, the temperature of the cold water output by the cold source can be 14-15℃, the water temperature output by the pre-cooling heat exchanger is 19-20℃ and can be directly used for the reheating heat exchanger, the water temperature in the reheating heat exchanger is reduced because the reheating heat exchanger needs to heat the fresh air, and the water temperature output by the reheating heat exchanger is 16-17℃. In this way, the water output by the reheating heat exchanger 223 can be directly used to absorb the condensation heat generated by the cooling and dehumidification. The above scheme of the application can fully utilize the water communication device to achieve the cooling, reheating after the dehumidification, condensation heat recovery and other purposes of the fresh air. The cold source outputs the water with a higher temperature to meet the reheating requirement of the fresh air, the energy utilization rate of the cold source is improved, and the system energy consumption of the whole fresh air machine can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an internal structure schematic diagram of the fresh air machine system of the prior art;

[0026] Figure 2 It is a schematic diagram of the arrangement mode of the connection components required by the water connection passage according to an embodiment of the application;

[0027] Figure 3 It is a schematic diagram of the communication relationship between the part of the water circulation loop and the refrigerant loop in the fresh air machine system according to an embodiment of the application.

[0028] The reference signs in the drawings are as follows:

[0029] 1, fresh air machine box; 100, cold source;

[0030] 2, air inlet channel; 21, fresh air filtering section; 22, dehumidification and reheating section; 221, pre-cooling heat exchanger; 222, dehumidification evaporator; 223, reheating heat exchanger; 23, enthalpy-increasing humidification section; 24, air supply section;

[0031] 3, air outlet channel; 31, air outlet filtering section; 32, humidification water tank section; 33, air outlet condensation section; 331, air outlet condenser; 332, fluorine water plate heat exchanger; 333, compressor; 34, air outlet section. DETAILED DESCRIPTION

[0032] The specific embodiments of the application will be further described in combination with the drawings.

[0033] It is readily understood that, based on the technical solution of this application, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of the application.

[0034] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0035] This embodiment provides a water connection device for a fresh air unit, such as... Figure 2 As shown, it includes:

[0036] Cold source 100 is used to output chilled water at a set temperature, which matches the temperature required for fresh air reheating. The set temperature can be selected to be around 15°C.

[0037] A precooling heat exchanger 221 has its inlet connected to the cold source 100 via a first pipe. The precooling heat exchanger is positioned upstream of the dehumidifying evaporator 232, along the airflow direction in the air inlet channel. The precooling heat exchanger 221 is used to cool the air before dehumidification.

[0038] The reheat heat exchanger 233 has its input end connected to the output end of the precooling heat exchanger 221 via a second pipeline. The reheat heat exchanger 233 is located downstream of the dehumidifying evaporator 232 along the air flow direction in the air inlet channel. The water temperature in the reheat heat exchanger 233 can reach 19-20℃, which is suitable for reheating the dehumidified air.

[0039] The fluorine water plate heat exchanger 332 has its input end connected to the reheat heat exchanger 233 via a third pipeline, and its output end connected to the cold source 100.

[0040] The application provides the above-mentioned scheme. The water communication device connects the cold source 100 and the pre-cooling heat exchanger 221. The pre-cooling heat exchanger 221 cools the fresh air to heat the cold water. The heated cold water is input into the reheating heat exchanger 223 to continue reheating the dehumidified fresh air. On this basis, the cold water output by the cold source 100 matches the temperature required for reheating the fresh air. Specifically, as shown in the figure, the temperature of the cold water output by the cold source 100 can be 14-15 DEG C. The pre-cooling heat exchanger 221 cools the air, so the temperature of the cold water is increased by absorbing the heat of the air. The output water temperature of 19-20 DEG C can be directly used in the reheating heat exchanger 223. The reheating heat exchanger 223 heats the fresh air, so the temperature of the water in the reheating heat exchanger 223 is reduced, and the output water temperature of 16-17 DEG C. In this way, the water output by the reheating heat exchanger 223 can be directly used to absorb the condensation heat generated by cooling and dehumidifying. The above-mentioned scheme of the application can fully utilize the water communication device to achieve the cooling, reheating after dehumidification, condensation heat recovery and other purposes of the fresh air. The cold source 100 outputs water with a higher temperature to meet the reheating requirements of the fresh air. The energy efficiency utilization rate of the cold source 100 is improved, and the system energy consumption of the entire fresh air machine can be reduced.

[0041] The above-mentioned pipelines can adopt water pipes suitable for the internal structure of the fresh air machine. The pipelines are connected between the corresponding components in the fresh air machine to realize the flow transmission of the cold water. It can be understood that the working principle and structure of other components in the fresh air machine in the scheme of the application are not affected and do not need to be changed.

[0042] Further, in the above-mentioned technical scheme, the water channel in the fluorine water plate heat exchanger 332 is connected with the reheating heat exchanger 223 and the cold source 100. That is, the cold source 100, the pre-cooling heat exchanger 221, the reheating heat exchanger 223 and the water channel of the fluorine water plate heat exchanger 332 form a water circulation path. The fluorine water plate heat exchanger 332 can timely absorb the condensation heat generated by cooling and dehumidifying, thereby improving the condensation efficiency of the system.

[0043] In the above-mentioned scheme, the pre-cooling heat exchanger 221 and the reheating heat exchanger 223 are both disc pipe structures. In specific implementation, the number of loops of the disc pipe can be selected according to the temperature drop of the air required by the pre-cooling heat exchanger 221 and the temperature rise of the air required by the reheating heat exchanger 223.

[0044] In order to ensure the operation efficiency of the water circulation loop, preferably, a circulating pump is arranged at the output port of the cold source. When it is necessary to further reduce the temperature of the fresh air, the circulating pump power can be increased, and the flow speed of the cold water can be increased to absorb more heat in the air.

[0045] In some embodiments of the application, a fresh air machine system is also provided, which comprises the water communication device for the fresh air machine according to any one of the above-mentioned schemes.

[0046] In combinationFigure 1 As shown, the fresh air machine system includes a fresh air machine box 1, which has an independent air inlet channel 2 and an air outlet channel 3. The air inlet channel 2 includes a fresh air filtering section 21, a dehumidification and reheating section 22, an enthalpy-increasing humidification section 23 and a supply air section 24 connected in sequence. The fresh air filtering section 21 is provided with a fresh air inlet opening connected with the outdoor environment. The supply air section 24 is provided with a supply air opening connected with the indoor environment. The outdoor fresh air enters the fresh air filtering section 21 for filtering through the fresh air inlet opening. The dehumidification and reheating section 22 is used to adjust the temperature of the fresh air, so as to heat or condense the fresh air from the outdoor environment, and also to remove the moisture in the fresh air to reduce the humidity of the fresh air. The enthalpy-increasing humidification section 23 is used to increase the moisture of the fresh air to increase the humidity of the fresh air. The enthalpy-increasing humidification section 23 is opened or closed according to the actual situation. For example, when the fresh air needs to be dehumidified, the enthalpy-increasing humidification section 23 is closed.

[0047] The air outlet channel 3 includes an air outlet filtering section 31, a humidification water tank section 32 and an air outlet condensing section 33 and an air outlet section 34 connected in sequence. The air outlet filtering section 31 is provided with a return air inlet opening connected with the indoor environment. The air outlet section 34 is provided with an air outlet opening connected with the outdoor environment. The air outlet channel 3 is used to filter and recover the waste heat of the air discharged from the indoor environment to the outdoor environment. The indoor return air enters the air outlet channel 3 through the return air inlet opening and is filtered by the air outlet filtering section 31. The humidification water tank section 32 includes a humidification membrane and a humidification water tank connected with the humidification membrane. Finally, the return air is actively guided to the outdoor environment through the air outlet section 34. The air outlet condensing section 33 includes an air outlet condenser 331, a fluorine water plate exchanger 332 and a compressor 333. The air outlet condenser 331 and the fluorine water plate exchanger 332 are used as a condenser of a fluorine system, which is used to absorb the condensation heat generated in the dehumidification process, heat the air in the air outlet channel, and discharge the heated air to the outdoor environment through the air outlet.

[0048] Based on the above structure, in combination with the existing fresh air machine structure and the water connection device in the present application, the pre-cooling heat exchanger 221, the dehumidification evaporator 222 and the reheating heat exchanger 223 in the water connection device of the present application are realized by the structure in the dehumidification and reheating section 22 of the fresh air machine system. The air outlet condenser 331, the compressor 333 and the fluorine water plate exchanger 332 used in cooperation can be selected from the existing structure in the air outlet condensing section 33 of the air outlet channel of the fresh air machine system. The compressor 333, the air outlet condenser 331, the fluorine water plate exchanger 332 and the dehumidification evaporator 222 form a refrigerant circulation path, which is used to realize the refrigeration and dehumidification function of the fresh air. Further preferably, an expansion valve is arranged between the dehumidification evaporator 222 and the compressor 333, which is used to balance and control the pressure and flow of the refrigerant pipeline. The above scheme of the present application only needs to use different pipelines to connect the corresponding components in water connection when it is realized, so as to introduce the cold water output from the cold source to different components, thereby realizing the cooling, dehumidification, condensation heat recovery and other purposes in the fresh air machine.

[0049] According to the need, the above technical solutions can be combined to achieve the best technical effect.

[0050] The above is only the principle and preferred embodiment of the present application. It should be noted that for those skilled in the art, on the basis of the principles of the present application, several other variations can also be made, which should be considered as the protection scope of the present application.

Claims

1. A water connection device for a fresh air unit, characterized in that, include: A cold source is used to output chilled water at a set temperature, which is matched with the temperature required for fresh air reheating. A precooling heat exchanger, the input end of which is connected to the cold source via a first pipeline, is located upstream of the dehumidifying evaporator along the air flow direction in the air inlet channel; The reheat heat exchanger has its input end connected to the output end of the precooling heat exchanger via a second pipeline. The reheat heat exchanger is located downstream of the dehumidifying evaporator along the air flow direction in the air inlet channel. The fluorinated plate heat exchanger has its input end connected to the reheat heat exchanger via a third pipeline, and its output end connected to the cold source.

2. The water connection device for a fresh air unit according to claim 1, characterized in that: The water channel in the fluorinated plate heat exchanger is connected to the reheat heat exchanger and the cold source.

3. The water connection device for a fresh air unit according to claim 2, characterized in that: The second pipeline is equipped with a flow control valve.

4. The water connection device for a fresh air unit according to claim 2, characterized in that: Both the precooling heat exchanger and the reheat heat exchanger are coil structures.

5. The water connection device for a fresh air unit according to claim 4, characterized in that, Also includes: A circulating pump is installed at the outlet of the cold source.

6. A fresh air system, characterized in that, Includes the water connection device for a fresh air unit as described in any one of claims 1-5.

7. The fresh air system according to claim 6, characterized in that: The precooling heat exchanger and the reheat heat exchanger are located in the dehumidification and reheat section of the air inlet channel of the fresh air system.

8. The fresh air system according to claim 6, characterized in that, Also includes: An exhaust condenser is installed in the exhaust condensation section of the exhaust duct of the fresh air system.

9. The fresh air system according to claim 8, characterized in that: The exhaust condensation section of the exhaust duct is equipped with a compressor; The refrigerant circulates between the compressor, the exhaust condenser, the refrigerant passage of the refrigerant water plate heat exchanger, the dehumidification reheat section, and the dehumidification evaporator.

10. The fresh air system according to claim 9, characterized in that: An expansion valve is provided between the dehumidifying evaporator and the compressor.

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