Energy-saving exhaust heat recovery rotary wheel dehumidification unit

Abstract

The utility model relates to the technical field of dehumidification air conditioning units, in particular to an energy-saving exhaust heat recovery rotary wheel dehumidification unit, the installation structural form of a heat recovery exhaust unit and a heat recovery rotary wheel dehumidification unit is that a box body is arranged separately or all the heat recovery exhaust unit and the heat recovery rotary wheel dehumidification unit are arranged in the same box body, and the heat recovery exhaust unit is provided with an exhaust fan box body. A second filter, an exhaust air heat recovery coil pipe and an exhaust fan are arranged in the exhaust fan box body, and the heat recovery rotating wheel dehumidification unit comprises a rotating wheel dehumidification regeneration section box body, a heat recovery section box body, a rotating wheel dehumidification front function section box body, a rotating wheel dehumidification treatment section box body and a rotating wheel dehumidification rear function section box body. The same dehumidification rotating wheel is mounted in the rotating wheel dehumidification regeneration section box body and the rotating wheel dehumidification treatment section box body; a heating device and a filter I are mounted in the rotating wheel dehumidification regeneration section box body; according to the rotary dehumidifier, the cooling capacity of exhaust air can be continuously recycled under the refrigeration working condition, and compared with a traditional rotary dehumidifier using the same heat return mode, the recycling capacity of the rotary dehumidifier is improved by more than 50% through high-temperature air on the regeneration side of the rotary wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of dehumidification air conditioning units, and in particular to an energy-saving exhaust heat recovery rotary dehumidification unit. Background Art

[0002] Rotary dehumidifiers are widely used for dehumidification in low-humidity environments in industrial and civil buildings. The dehumidification principle of rotary dehumidifiers is to use silica gel coated on the rotor to physically adsorb moisture in the air onto porous synthetic silica gel, and then heat and vaporize the water vapor adsorbed on the silica gel pores in the rotor regeneration area to form high-temperature and high-humidity air at the inlet of the AC heat exchanger. Then, when passing through the heat exchanger that has been cooled by the indoor cold and humid air, condensed water is discharged due to the difference in dew point.

[0003] Rotary dehumidifiers are widely used in most parts of my country. When used in buildings such as laboratories, negative pressure wards, and pharmaceutical plants, due to the large amount of pollutants in the exhaust air, heat recovery cannot be performed directly between the new exhaust air. It is necessary to use a heat recovery device that completely isolates the new exhaust air for heat recovery, such as heat pipes and liquid circulation energy recovery devices. However, traditional rotary systems usually set the heat recovery device at the inlet of the fresh air unit and the exhaust air for heat recovery. Since the inlet temperature of the fresh air is unstable, the temperature difference between the fresh air and the exhaust air is very small in many time periods during the refrigeration operation, and the recoverable energy is limited.

[0004] Therefore, it is necessary to design an energy-saving exhaust heat recovery rotary dehumidifier unit to solve the problem of limited recoverable energy and insufficient energy saving caused by unstable inlet air temperature of the existing rotary system. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an energy-saving exhaust heat recovery rotary dehumidification unit, which can continuously recover the cold energy of the exhaust air under refrigeration conditions.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an energy-saving exhaust heat recovery rotary dehumidifier unit, including a heat recovery exhaust fan unit and a heat recovery rotary dehumidifier unit, the installation structure of the heat recovery exhaust fan unit and the heat recovery rotary dehumidifier unit is a separate box or all in the same box, the heat recovery exhaust fan unit is provided with an exhaust fan box, the exhaust fan box is provided with a filter 2, an exhaust heat recovery coil and an exhaust fan, the heat recovery rotary dehumidifier unit includes a rotary dehumidification regeneration section box, a heat recovery section box, a rotary dehumidification front functional section box, a rotary dehumidification treatment section box and a rotary dehumidification rear functional section box, the rotary dehumidification regeneration section box and the rotary dehumidification treatment section box are installed with the same dehumidification wheel, and the rotary dehumidification regeneration section box is installed with a heating device and a filter 1.

[0007] Specifically, one end of the dehumidification wheel is arranged in the wheel dehumidification treatment section box, and the other end of the dehumidification wheel is arranged in the wheel dehumidification regeneration section box.

[0008] Specifically, a fresh air heat recovery coil is provided in the heat recovery section box, the fresh air heat recovery coil is connected to the exhaust air heat recovery coil through a heat recovery pipeline, and a heat recovery pump is installed on the heat recovery pipeline.

[0009] Specifically, a surface cooler is provided in the box of the pre-functional section of the rotary dehumidification device, and the surface cooler pre-cools the dehumidified air after heat recovery;

[0010] A recooling surface cooler is arranged in the function section box after the rotary dehumidification, and the recooling surface cooler adjusts the temperature of the air after the rotary dehumidification.

[0011] Specifically, the surface cooler, recooling surface cooler, fresh air heat recovery coil and exhaust air heat recovery coil all use finned heat exchangers, and the working fluids in the surface cooler, recooling surface cooler, fresh air heat recovery coil and exhaust air heat recovery coil are all water or aqueous solution or Freon.

[0012] Specifically, the surface cooler and the recooling surface cooler are connected to the same external cold source or different external cold sources through a cold supply pipeline.

[0013] Specifically, the functional section box body of the rotary dehumidifier is provided with an air supply port, a blower is installed at the air supply port, the exhaust fan box is provided with an exhaust port, an exhaust fan is installed at the exhaust port, and the driving motors of the blower and the exhaust fan are both AC motors or DC brushless EC motors.

[0014] Specifically, the rotary dehumidification regeneration section box is provided with an air inlet, and the air inlet takes outdoor fresh air or indoor return air into the unit.

[0015] Specifically, the heating device is an electric heater or a steam heater or a heat pump condensing heat device or a waste heat recovery device.

[0016] Specifically, the dehumidification wheel is one of a polymer dehumidification wheel, a silica gel dehumidification wheel, a lithium chloride dehumidification wheel, an activated silica gel dehumidification wheel, a molecular sieve dehumidification wheel and an organic synthetic material dehumidification wheel.

[0017] The utility model has the following beneficial effects:

[0018] The energy-saving exhaust heat recovery rotary dehumidifier unit designed by the utility model can continuously recover the coldness of the exhaust air under refrigeration conditions. The high-temperature air passing through the regeneration side of the rotary wheel will become high-temperature and high-humidity air due to the absorption of water vapor on the rotary wheel. Even if the temperature and humidity of the air entering the unit is lower than that of the indoor exhaust air, it will become high-temperature and high-humidity air with a temperature and humidity far higher than that of the exhaust air after passing through the regeneration side of the rotary wheel. The heat recovery amount and recovery time are more than 50% higher than the recovery capacity of the traditional rotary dehumidifier using the same heat recovery method. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an energy-saving exhaust heat recovery rotary dehumidification unit.

[0020] In the figure: 1-rotary dehumidification front functional section box; 2-surface cooler; 3-dehumidification rotary wheel; 4-re-cooling surface cooler; 5-air supply fan; 6-rotary dehumidification treatment section box; 7-rotary dehumidification rear functional section box; 8-external cold source; 9-fresh air heat recovery coil; 10-heating device; 11-filter one; 12-exhaust fan; 13-exhaust air heat recovery coil; 14-cooling pipeline; 15-heat recovery pipeline; 16-rotary dehumidification regeneration section box; 17-heat recovery pump; 18-exhaust fan box; 19-heat recovery section box; 20-filter two. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely further describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] like Figure 1As shown, an energy-saving exhaust heat recovery rotary dehumidifier unit includes a heat recovery exhaust fan unit and a heat recovery rotary dehumidifier unit, and the installation structure of the heat recovery exhaust fan unit and the heat recovery rotary dehumidifier unit is to set the housing separately or all in the same housing; wherein the heat recovery exhaust fan unit is provided with an exhaust fan housing 18, and the exhaust fan housing 18 is provided with a filter 20, a heat recovery heat exchanger 13 and an exhaust fan 12; the heat recovery rotary dehumidifier unit comprises: a rotary dehumidification regeneration section housing 16, a heat recovery section housing 19, a rotary dehumidification front functional section housing 1, a rotary dehumidification treatment section housing 6 and a rotary dehumidification rear functional section housing 7; a filter 11 and a heating device 10 are respectively arranged at the front end of the rotary dehumidifier in the rotary dehumidification regeneration section housing 16, to filter and heat the dehumidified air in turn; the dehumidification rotary wheel 3 One end of the dehumidifier is arranged in the rotary dehumidification treatment section box 6, and the other end of the dehumidification wheel 3 is arranged in the rotary dehumidification post-functional section box 7; a fresh air heat recovery coil 9 is arranged in the heat recovery section box 19, which is connected to the exhaust heat recovery coil 13 in the exhaust fan box 18 through a heat recovery pipeline 15; a surface cooler 2 is arranged in the rotary dehumidification front functional section box 1 to pre-cool the dehumidified air after heat recovery; the rotary dehumidification post-functional section box 7 is generally provided with a re-cooling surface cooler 4 to adjust the temperature of the air after the rotary dehumidification; the surface cooler 2 in the rotary dehumidification front functional section and the re-cooling surface cooler 4 in the re-cooling treatment functional section can use the same external cold source 8, or can be arranged separately; the heating device 10 is one of electric heating, steam heater, heat pump condensing heat device or waste heat recovery device.

[0024] It should be noted that, in addition to the rotary dehumidification treatment section box 6, other functions such as air filtration, pre-cooling, temperature adjustment (re-cooling) can be configured as required.

[0025] It should be noted that the heat recovery section box 19 is provided with a fresh air heat recovery coil 9, and the heat recovery pipeline 15 is connected to the exhaust heat recovery coil 13 in the exhaust fan box 18; the working medium circulation in the heat recovery pipeline 15 is driven by the heat recovery pump 17 to recover the energy in the exhaust air.

[0026] It should be noted that the air entering the dehumidification wheel 3 is precooled by providing a precooling fin heat exchanger (surface cooler 2).

[0027] It should be noted that one end of the dehumidification wheel 3 is arranged in the rotary dehumidification treatment section box 6, and the other end is arranged in the rotary dehumidification regeneration section box 16. The dehumidification wheel 3 is rotated by its own driving device. The dehumidification wheel 3 is transferred from the rotary dehumidification treatment section box 6 to the rotary dehumidification regeneration section box 16, and then from the rotary dehumidification regeneration section box 16 to the rotary dehumidification treatment section box 6. The continuously circulating dehumidification wheel 3 realizes heat exchange between the airflows in two different working conditions through the rotary dehumidification treatment section box 6 and the rotary dehumidification regeneration section box 16. The dehumidification wheel 3 in the rotary dehumidification regeneration section box 16 exchanges heat with the high-temperature dry air to dry the dehumidification wheel 3; the dehumidification wheel 3 in the rotary dehumidification treatment section 6 exchanges heat with the low-temperature humid air treated by the pre-cooling fin heat exchanger (surface cooler 2), absorbs water vapor in the air, and dehumidifies the air.

[0028] In the present embodiment, a pre-cooling finned heat exchanger 2 is provided inside the rotary dehumidification front functional section box 1 .

[0029] The working fluid in the heat recovery coil can be water, an aqueous solution, or Freon.

[0030] Specifically, in the present embodiment, a re-cooling finned heat exchanger (re-cooling surface cooler 4) is provided inside the re-cooling functional section box 7.

[0031] It should be noted that the air leaving the dehumidification wheel 3 is re-cooled by setting a re-cooling fin heat exchanger (re-cooling surface cooler 4); and various air state processing is achieved by setting functional sections that meet the requirements of air filtration, pre-cooling, temperature control, humidification, etc. in the functional section box 1 before the dehumidification wheel and the functional section box 7 after the dehumidification wheel.

[0032] In the present embodiment, a pre-cooling finned heat exchanger is provided in the front functional section of the rotary dehumidification device, and the working medium in the heat exchanger can be water, an aqueous solution, or freon.

[0033] In the present embodiment, a re-cooling finned heat exchanger (surface cooler 2) is provided in the post-dehumidification functional section of the rotary wheel, and the working medium in the heat exchanger is water or an aqueous solution or Freon.

[0034] In this embodiment, the pre-cooling finned heat exchanger (surface cooler 2) is connected to a cold source through a pipeline; the re-cooling finned heat exchanger (re-cooling surface cooler 4) is connected to a cold source through a cooling pipeline 14;

[0035] In the present embodiment, an energy-saving exhaust heat recovery rotary dehumidifier unit is provided, and the driving motors of the exhaust fan 12 and the supply fan 5 are either AC motors or brushless DC EC motors.

[0036] In this embodiment, an energy-saving exhaust heat recovery rotary dehumidifier unit is provided, and the heat recovery rotary dehumidifier unit can take outdoor fresh air or indoor return air;

[0037] In this embodiment, an energy-saving exhaust heat recovery rotary dehumidifier unit is provided, wherein the surface cooler and the heat recovery coil are both finned heat exchangers.

[0038] In this embodiment, an energy-saving exhaust heat recovery rotary dehumidification unit is provided, and the dehumidification rotary wheel 3 is one of a polymer dehumidification rotary wheel, a silica gel dehumidification rotary wheel, a lithium chloride dehumidification rotary wheel, an activated silica gel dehumidification rotary wheel, a molecular sieve dehumidification rotary wheel and an organic synthetic material dehumidification rotary wheel.

[0039] Compared with the prior art, the energy-saving exhaust heat recovery rotary dehumidifier unit of the utility model can continuously recover the cold of the exhaust air under refrigeration conditions. The high-temperature air passing through the regeneration side of the rotary wheel will become high-temperature and high-humidity air due to the absorption of water vapor on the rotary wheel. Even if the air temperature and humidity entering the unit is lower than the indoor exhaust air, it will become high-temperature and high-humidity air with a temperature and humidity far higher than that of the exhaust air after passing through the regeneration side of the rotary wheel. The heat recovery amount and recovery time are more than 50% higher than the heat recovery capacity of the traditional rotary dehumidifier using the same heat recovery method.

[0040] The present utility model is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the inspiration of the present utility model. Any technical solutions that are the same or similar to the present utility model fall within the protection scope of the present utility model.

[0041] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. An energy-saving exhaust heat recovery rotary dehumidifier unit, characterized in that: It includes a heat recovery exhaust fan unit and a heat recovery rotary dehumidifier unit. The installation structure of the heat recovery exhaust fan unit and the heat recovery rotary dehumidifier unit is that the boxes are separately set or all are in the same box. The heat recovery exhaust fan unit is provided with an exhaust fan box, and the exhaust fan box is provided with filter 2, exhaust heat recovery coil and exhaust fan. The heat recovery rotary dehumidifier unit includes a rotary dehumidification regeneration section box, a heat recovery section box, a rotary dehumidification front functional section box, a rotary dehumidification treatment section box and a rotary dehumidification rear functional section box. The same dehumidification wheel is installed in the rotary dehumidification regeneration section box and the rotary dehumidification treatment section box, and a heating device and filter 1 are installed in the rotary dehumidification regeneration section box.

2. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 1 is characterized in that: One end of the dehumidification wheel is arranged in the wheel dehumidification treatment section box, and the other end of the dehumidification wheel is arranged in the wheel dehumidification regeneration section box.

3. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 1 is characterized in that: A fresh air heat recovery coil is arranged in the heat recovery section box, the fresh air heat recovery coil is connected with the exhaust air heat recovery coil through a heat recovery pipeline, and a heat recovery pump is installed on the heat recovery pipeline.

4. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 3 is characterized in that: A surface cooler is provided in the box body of the pre-functional section of the rotary dehumidifier, and the surface cooler pre-cools the dehumidified air after heat recovery; A recooling surface cooler is arranged in the function section box after the rotary dehumidification, and the recooling surface cooler adjusts the temperature of the air after the rotary dehumidification.

5. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 4 is characterized in that: The surface cooler, recooling surface cooler, fresh air heat recovery coil and exhaust air heat recovery coil all adopt finned heat exchangers, and the working fluids in the surface cooler, recooling surface cooler, fresh air heat recovery coil and exhaust air heat recovery coil are all water or aqueous solution or Freon.

6. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 4 is characterized in that: The surface cooler and the recooling surface cooler are connected to the same external cold source or different external cold sources through a cold supply pipeline.

7. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 1 is characterized in that: The dehumidifier rear functional section box body is provided with an air supply port, at which a blower is installed; the exhaust fan box body is provided with an exhaust port, at which an exhaust fan is installed; the drive motors of the blower and the exhaust fan are both AC motors or brushless DC EC motors.

8. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 1, characterized in that: The rotary dehumidification regeneration section box is provided with an air inlet, through which outdoor fresh air or indoor return air is taken into the unit.

9. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 1, characterized in that: The heating device adopts an electric heater or a steam heater or a heat pump condensing heat device or a waste heat recovery device.

10. The energy-saving exhaust heat recovery rotary dehumidifier unit according to claim 1, characterized in that: The dehumidification wheel is one of a high molecular polymer dehumidification wheel, a silica gel dehumidification wheel, a lithium chloride dehumidification wheel, an active silica gel dehumidification wheel, a molecular sieve dehumidification wheel and an organic synthetic material dehumidification wheel.

Images