Condensation heat recovery fan device

Abstract

The utility model discloses a condensation heat recovery fan device. The condensation heat recovery fan device comprises a water supply part and a heat exchange part, wherein the water supply part comprises a freezing water source and a hot water source which are arranged in a switchable mode; the fresh air part comprises a fresh air section, a surface cooling section and an air supply section, and the air return part comprises an air return section, a water cooling condenser section and an exhaust section; the main pipe comprises a water inlet pipe and a water return pipe, the water inlet pipe and the water return pipe are circularly communicated between the surface cooling section and the water supply part, and a first adjusting valve is arranged on the main pipe; the branch pipes comprise the first water inlet branch pipe and the first water return branch pipe, the first water inlet branch pipe is connected between the water return pipe and the water cooling condenser section, and the first water return branch pipe is connected between the water inlet pipe and the water cooling condenser section. According to the condensation heat recovery fan device, the size of the heat recovery device is reduced, and the heat recovery efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ventilation, in particular to a condensation heat recovery fan device. BACKGROUND

[0002] The heat recovery fresh air system is beneficial to the realization of the requirement of the super-low energy consumption building, the exchange efficiency of the heat recovery device is required to be not less than 65% for refrigeration and not less than 70% for heating, and the heat recovery efficiency of the conventional plate-fin is only 60%, and the heat efficiency is low; the heat efficiency of the total heat recovery core body can reach the requirement, but the volume is relatively large, and the structure is relatively complex, and it is not conducive to the floor installation. CONTENT OF THE INVENTION

[0003] The application aims to provide a condensation heat recovery fan device, which reduces the volume of the heat recovery device and improves the heat recovery efficiency.

[0004] The condensation heat recovery fan device provided by the application comprises a water supply part, a fresh air part and a return air part, a main pipe and a branch pipe.

[0005] Optionally, the first regulating valve is arranged on the return water pipe, and the return water pipe is provided with a balance valve downstream of the first regulating valve.

[0006] Optionally, the fresh air part further comprises an evaporation section located behind the surface cooling section in the air flow direction, and a temperature and humidity sensor is arranged between the surface cooling section and the evaporation section or in the front part of the surface cooling section, and the temperature and humidity sensor is in communication connection with the controller of the first regulating valve.

[0007] Optionally, the fresh air part further comprises a reheating section located behind the evaporation section in the air flow direction, and the return air part further comprises a compressor section located behind the water-cooled condenser section in the air flow direction, and the inlet of the reheating section is in communication connection with the outlet of the compressor section.

[0008] Optionally, the return air part further comprises a condensation plate exchange section located behind the compressor section in the air flow direction, and the condensation plate exchange section is in communication connection with the first water inlet branch pipe through a second water inlet branch pipe and in communication connection with the first water return branch pipe through a second water return branch pipe.

[0009] Optionally, in summer refrigeration working condition, the outlet of the condensing plate heat exchanger section is connected with the inlet of the evaporating section, the outlet of the water-cooled condenser section is connected with the inlet of the condensing plate heat exchanger section, the outlet of the evaporating section is connected with the inlet of the compressor, and the outlet of the reheating section is connected with the inlet of the water-cooled condenser section.

[0010] Optionally, a second regulating valve is arranged on the first return water branch pipe, and a controller of the second regulating valve is in communication connection with the air supply temperature setter to adjust the opening degree and on-off of the second regulating valve according to the air supply temperature set by the air supply temperature setter.

[0011] Optionally, a variable frequency pump is arranged in the water-cooled condenser section, and the outlet of the variable frequency pump is connected with the second return water branch pipe.

[0012] Optionally, the fresh air part further comprises a humidifying section located behind the reheating section in the air flow direction.

[0013] Optionally, a dust remover is arranged in each of the fresh air section and the return air section.

[0014] The above technical scheme has the following beneficial effects:

[0015] The condensing heat recovery air fan device provided by the application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The working flow chart of the condensing heat recovery air fan device provided by an embodiment of the application in summer refrigeration and dehumidification working condition is shown.

[0017] Figure 2 The working flow chart of the condensing heat recovery air fan device provided by an embodiment of the application in winter heating and humidification working condition is shown.

[0018] LIST OF ELEMENTS

[0019] 1 - water supply part.

[0020] 2 - fresh air part, 20 - fresh air section, 21 - surface cooling section, 22 - evaporating section, 23 - reheating section, 24 - humidifying section, 25 - air supply section.

[0021] 3 - return air part, 30 - return air section, 31 - water-cooled condenser section, 32 - compressor section, 33 - condensing plate heat exchanger section, 330 - second water inlet branch pipe, 331 - second water return branch pipe, 34 - exhaust air section.

[0022] 4 - main pipe, 40 - water inlet pipe, 41 - water return pipe, 42 - first regulating valve, 43 - balance valve.

[0023] 5 - branch pipe, 50 - first water inlet branch pipe, 51 - first water return branch pipe, 52 - second regulating valve. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be further described below with reference to the accompanying drawings.

[0025] It is easily understood that, according to the technical scheme of the present application, a person skilled in the art can replace various structural modes and implementation modes without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical scheme of the present application, and should not be regarded as the whole or as a limitation or restriction of the technical scheme of the present application.

[0026] In this specification, the orientation terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structure shown in the drawings, and they are relative concepts, so they can change accordingly according to their different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0027] The condensing heat recovery fan device provided by an embodiment of the present application comprises a water supply part 1, a fresh air part 2, a return air part 3, a main pipe 4 and a branch pipe 5.

[0028] The water supply part 1 comprises a switchable cold water source and a hot water source.

[0029] The fresh air part 2 comprises a fresh air section 20, a surface cooling section 21 and a supply air section 25; the return air part 3 comprises a return air section 30, a water-cooled condenser section 31 and an exhaust air section 34.

[0030] The main pipe 4 comprises a water inlet pipe 40 and a water return pipe 41, and the water inlet pipe 40 and the water return pipe 41 are in circulation communication between the surface cooling section 21 and the water supply part 1. Please refer to the arrows in the accompanying drawings Figure 1 and the accompanying drawings Figure 2 , wherein the arrows in the accompanying drawings Figure 1 and the accompanying drawings Figure 2 are water flow directions, the solid lines where the arrows are located represent the direction of water flow outside the unit, and the dashed lines represent the direction of water flow inside the unit. The inlet of the water inlet pipe 40 is used to connect the water supply part 1, and the outlet of the water inlet pipe 40 is connected to the surface cooling section 21; the inlet of the water return pipe 41 is connected to the surface cooling section 21, and the outlet of the water return pipe 41 is used to connect the water supply part 1. The main pipe 4 is provided with a first regulating valve 42.

[0031] The branch pipe 5 includes a first water inlet branch pipe 50 and a first water return branch pipe 51, the first water inlet branch pipe 50 is connected between the water return pipe 41 and the water-cooled condenser section 31, and the first water return branch pipe 51 is connected between the water inlet pipe 40 and the water-cooled condenser section 31. Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 2 The inlet of the first water inlet branch pipe 50 is connected with the water-cooled condenser section 31, the outlet of the first water inlet branch pipe 50 is connected with the water return pipe 41, the outlet of the first water return branch pipe 51 is connected with the water-cooled condenser section, and the inlet of the first water return branch pipe 51 is connected with the water-cooled condenser section 31.

[0032] In the embodiment of the utility model, the chilled water source can be a refrigeration-capable host such as a water chiller, an air-cooled heat pump, and a ground source heat pump; the hot water source comes from a heating-capable host such as a boiler, a heat source heat pump, and an air source heat pump. In the refrigeration and dehumidification working condition in summer, the water supply part 1 is switched to the chilled water source; in the heating and humidification working condition in winter, the water supply part 1 is switched to the hot water source.

[0033] The fresh air section 20 is the inlet of fresh air, the supply air section 25 supplies fresh air into the room, the return air section 30 is used for the inlet of return air, and the exhaust air section 34 exhausts air outside.

[0034] In the optional embodiment of the surface cooling section 21, the surface cooling section 21 includes multiple or multiple rows of coil pipes, for example, the surface cooling section 21 can include multiple rows of coil pipes, and the multiple rows of coil pipes are connected in parallel.

[0035] In the optional embodiment of the water-cooled condenser section 31, the water-cooled condenser section 31 includes a water-cooled condenser, which can be a double-pipe condenser.

[0036] The condensing heat recovery fan device provided in the embodiment of the utility model, the surface cooling section 21 is connected to the water supply part 1 through the main pipe 4, the water-cooled condenser section 31 is also connected to the water supply part 1 through the branch pipe 5 connected with the main pipe 4, and the first regulating valve 42 adjusts the water supply amount of the water supply part 1, so as to adjust the refrigeration or heating effect, so that the system does not need to use secondary water of other pipelines, the equipment pipeline is simplified, the equipment volume is reduced, and the thermal efficiency is improved.

[0037] In an optional embodiment, the first regulating valve 42 is arranged on the water return pipe 41, and the water return pipe 41 is provided with a balance valve 43 downstream of the first regulating valve 42. The first regulating valve 42 is used for controlling the flow value of the fluid in the water return pipe 41. The balance valve 43 is used for controlling the peak water amount of the primary water of the main pipe 4, achieving the balance of the water amount in the pipeline, and ensuring the water flow stability of the condensing heat recovery fan device.

[0038] Further, the balance valve 43 in the embodiment of the utility model can be a static balance valve 43, the flow of the valve is adjusted by changing the opening degree of the valve core and the valve seat, the flow resistance of the flow through the valve is changed, and the purpose of adjusting the flow is achieved.

[0039] In an optional embodiment, the fresh air section 2 further comprises an evaporative section 22 located behind the cooling section 21 in the air flow direction, and a temperature and humidity sensor is arranged between the cooling section 21 and the evaporative section 22 or in front of the cooling section 21, and the temperature and humidity sensor is in communication with the controller of the first regulating valve 42. The evaporative section 22 is provided with an evaporator, and when the humid air passes through the evaporator, the water vapor in the air will condense into water droplets due to the low temperature of the evaporator surface, thereby reducing the humidity in the air. The temperature and humidity sensor collects the temperature and humidity values in front of the evaporative section 22 or in front of the cooling section 21 in real time to accurately control the opening of the first regulating valve 42. The first regulating valve 42 can be an electrically controlled valve, and the controller is located on the first regulating valve 42 and adjusts the opening of the first regulating valve 42 according to the feedback value of the temperature and humidity sensor. When the value is higher than the set value, it indicates that the humidity is too large, and the opening of the first regulating valve 42 is increased to increase the dehumidification degree of the cooling section 21; otherwise, the opening is reduced to ensure that the humidity of the air out of the evaporative section 22 is not greater than 8 g / kg.

[0040] In an optional embodiment, the fresh air section 2 further comprises a reheating section 23 located behind the evaporative section 22 in the air flow direction, and the return air section 3 further comprises a compressor section 32 located behind the water-cooled condenser section 31 in the air flow direction, and the reheating section 23 is in communication with the compressor section 32. Optionally, the reheating section 23 comprises a heating coil or other heat exchange structure, and the condensation heat generated during the operation of the compressor is recovered to the reheating section 23 to heat and warm the fresh air. The compressor section 32 and the reheating section 23 are connected by a heat exchange pipe, and the medium in the heat exchange pipe can be air or water.

[0041] In an optional embodiment, the return air section 3 further comprises a condensing plate section 33 located behind the compressor section 32 in the air flow direction, and in the summer cooling condition, the condensing plate section 33 is in communication with the first water inlet branch pipe 50 through a second water inlet branch pipe 330 and in communication with the first water return branch pipe 51 through a second water return branch pipe 331. The condensing plate section 33 comprises a condensing plate heat exchanger, and when a hot fluid passes through one side of the condensing plate heat exchanger, the heat is transferred to the cold fluid on the other side of the condensing plate heat exchanger. The second water inlet branch pipe 330 and the second water return branch pipe 331 circulate the condensing plate section 33 between the first water inlet branch pipe 50 and the first water return branch pipe 51 to realize heat exchange.

[0042] In an optional embodiment, in the summer cooling condition, the outlet of the condensing plate section 33 is in communication with the inlet of the evaporative section 22, the outlet of the water-cooled condenser section 31 is in communication with the inlet of the condensing plate section 33, the outlet of the evaporative section 22 is in communication with the inlet of the compressor, and the outlet of the reheating section 23 is in communication with the inlet of the water-cooled condenser section 31. Please refer to Figure 1, in summer cooling condition, the condensing heat generated by the evaporating section 22 condensing and dehumidifying is transferred to the compressor section 32 and then to the reheating section 23 to heat the fresh air, and the remaining heat of the reheating section 23 is transferred to the water-cooled condenser section 31. Please refer to Figure 2 In winter heating stage, the condensing plate section 33 and the reheating section 23 stop running.

[0043] In an optional embodiment, the first return water branch pipe 51 is provided with a second regulating valve 52, and the controller of the second regulating valve 52 is in communication connection with a supply air temperature setter. The supply air temperature setter sets the opening degree and on-off of the second regulating valve 52. The supply air temperature setter can be a temperature remote controller or other device that can set the indoor temperature value (the temperature value of the supply air section 25). The supply air temperature setter and the controller of the second regulating valve 52 are optionally in communication connection through Bluetooth or WiFi. The second regulating valve 52 adjusts the water quantity in the first return water branch pipe 51 to adjust the condensing heat of the water-cooled condenser section 31, and then adjusts the supply air temperature.

[0044] Further, the controller of the second regulating valve 52 can also be connected with a temperature and humidity sensor. Under a preset program, the feedback value of the supply air temperature and the temperature and humidity sensor is used to control the opening degree and on-off of the second regulating valve 52.

[0045] In an optional embodiment, a variable frequency pump is arranged in the water-cooled condenser section 31, and the outlet of the variable frequency pump is in communication connection with the second return water branch pipe 331. The variable frequency pump changes its rotating speed to adjust the flow and pressure of the second return water branch pipe 331, so as to adjust the water passing amount of the second return water branch pipe 331.

[0046] The variable frequency pump can be a centrifugal variable frequency pump, an axial variable frequency pump, etc. to meet the fluid transmission and circulation requirements under the required working condition.

[0047] In an optional embodiment, the fresh air part 2 further comprises a humidifying section 24 located behind the reheating section 23 along the air flow direction. The humidifying section 24 is used for humidifying the fresh air to improve the humidity of the fresh air entering the indoor. According to the humidifying requirement, the humidifying device in the humidifying section 24 can be a high-pressure micro-fog humidifying device, a steam humidifying device, an electric heating humidifying device, a membrane humidifying device, or an ultrasonic humidifying device, etc.

[0048] In an alternative embodiment, a dust remover is arranged in the fresh air section 20 and the return air section 30. The dust remover is used to remove impurities in the air entering the fresh air section 20 and the return air section 30, and the dust remover can include a filter screen. The pore size of the filter screen is set according to the filtering requirement. In an alternative embodiment, the fresh air section 20, the surface cooling section 21, the evaporation section 22, the reheating section 23, the humidifying section 24, and the supply air section 25 of the fresh air part 2 are connected in series. The return air section 30, the water-cooled condenser section 31, the compressor section 32, the condenser plate section 33, and the exhaust air section 34 of the return air part 3 are connected in series.

[0049] In the condensing heat recovery fan device disclosed in the embodiments of the present application, the operation process in the summer refrigeration and dehumidification condition and the winter heating and humidification condition is as follows.

[0050] In the summer refrigeration and dehumidification condition, the water supply part 1 is switched to the chilled water source, the outdoor fresh air is deeply dehumidified by the surface cooling section 21 and the evaporation section 22, the compressor section 32 generates condensing heat, which is used to preferentially heat the deeply dehumidified fresh air in the reheating section 23 to increase the temperature of the fresh air (the temperature of the deeply dehumidified fresh air is too low (about 10-11℃), and the fresh air needs to be heated to about 16℃ by the reheating section 23 before being directly sent to the indoor environment), the excess heat is secondarily borne by the water-cooled condenser section 31, and finally the remaining condensing heat is borne by the condenser plate section 33. The water quantity required in the process is determined by the supply air temperature set value set by the supply air temperature setter and the temperature and humidity feedback by the temperature and humidity sensor, and the opening degree of the second adjusting valve 52 is automatically adjusted.

[0051] In the winter heating and humidification condition, the water supply part 1 is switched to the hot water source, the surface cooling section 21 is converted into a condenser to heat the fresh air, and the water-cooled condenser section 31 is converted into an evaporator. In this condition, the reheating section 23 and the condenser plate section 33 stop working, and the cold quantity generated by the operation of the compressor section 32 is entirely borne by the return air of the return air part 3. The return air after heat exchange is discharged to the outdoor environment through the exhaust air section 34. The above technical solutions can be combined as needed to achieve the best technical effect.

[0052] The above is only the principle and the preferred embodiment of the present application. It should be noted that, for those skilled in the art, on the basis of the principle of the present application, a number of other variants can also be made, which should also be considered as the protection scope of the present application.

Claims

1. A condensing heat recovery fan arrangement, characterized in that, The application relates to a water-cooled air conditioning system. The water supply part comprises a switchable cold water source and a hot water source; The fresh air part comprises a fresh air section, a surface cooling section and a supply air section, and the return air part comprises a return air section, a water-cooled condenser section and an exhaust air section; The main pipe comprises an inlet pipe and a return pipe, and the inlet pipe and the return pipe are in circulation communication between the surface cooling section and the water supply part, and a first regulating valve is arranged on the main pipe; The branch pipe comprises a first inlet branch pipe and a first return branch pipe, the first inlet branch pipe is connected between the return pipe and the water-cooled condenser section, and the first return branch pipe is connected between the inlet pipe and the water-cooled condenser section.

2. The condensing heat recovery fan device of claim 1, wherein, The first regulating valve is arranged on the return pipe, and a balance valve is arranged on the return pipe downstream of the first regulating valve.

3. The condensing heat recovery fan device of claim 1, wherein, The fresh air part further comprises an evaporation section located behind the surface cooling section in the air flow direction, and a temperature and humidity sensor is arranged between the surface cooling section and the evaporation section or in the front part of the surface cooling section, and the temperature and humidity sensor is in communication connection with the controller of the first regulating valve.

4. The condensing heat recovery fan device of claim 3, wherein, The fresh air part further comprises a reheating section located behind the evaporation section in the air flow direction. The return air part further comprises a compressor section located behind the water-cooled condenser section in the air flow direction, and the inlet of the reheating section is in communication connection with the outlet of the compressor section.

5. The condensing heat recovery fan device of claim 4, wherein, The return air part further comprises a condenser plate section located behind the compressor section in the air flow direction, and the condenser plate section is in communication connection with the first inlet branch pipe through a second inlet branch pipe and in communication connection with the first return branch pipe through a second return branch pipe.

6. The condensing heat recovery fan device of claim 5, wherein, In the summer refrigeration working condition, the outlet of the condenser plate section is in communication connection with the inlet of the evaporation section, the outlet of the water-cooled condenser section is in communication connection with the inlet of the condenser plate section, the outlet of the evaporation section is in communication connection with the inlet of the compressor, and the outlet of the reheating section is in communication connection with the inlet of the water-cooled condenser section.

7. The condensing heat recovery fan device of claim 1, wherein, A second regulating valve is arranged on the first return branch pipe, and the controller of the second regulating valve is in communication connection with a supply air temperature setter to adjust the opening degree and on-off of the second regulating valve according to the supply air temperature set by the supply air temperature setter.

8. The condensing heat recovery fan device of claim 5, wherein, A variable frequency pump is arranged in the water-cooled condenser section, and the outlet of the variable frequency pump is in communication connection with the second return branch pipe.

9. The condensing heat recovery fan device of claim 4, wherein, The fresh air part further comprises a humidifying section located behind the reheating section in the air flow direction.

10. The condensing heat recovery fan device of claim 1, wherein, Dust removers are arranged in the fresh air section and the return air section.

Images