Air mixing type low-temperature regeneration rotating wheel dehumidification unit

Abstract

The utility model relates to the technical field of air mixing type air conditioning units, and particularly discloses an air mixing type low-temperature regeneration rotating wheel dehumidification unit which comprises a first box body and a second box body, the first box body serves as the air inlet side of the unit, the second box body serves as the air supply side of the unit, a first partition plate and a second partition plate are arranged in the first box body, and a first-stage pre-cooling coil pipe is installed on the upper portion of the first partition plate. A third partition plate is arranged in the middle of the second box body, a second-stage pre-cooling coil pipe is arranged below the third partition plate of the second box body, an air supply outlet is formed below the third partition plate of the second box body, and a heat recovery plate heat exchanger is arranged above the third partition plate of the second box body. The regeneration air volume is taken from the mixed air volume of low-temperature and low-humidity air cooled and dehumidified by the pre-cooling coil pipe and return air of treated air, the mixed air volume becomes high-temperature and low-humidity air after being exchanged by the heat recovery plate and heated by the heating coil pipe, and the regeneration capacity is higher, so that the scheme has higher dehumidification capacity; the application range of the low-temperature regeneration dehumidification rotating wheel is expanded; transportation and installation are convenient, the structure is compact, and space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of mixed air type air conditioning units, in particular to a mixed air type low-temperature regenerative rotary dehumidification unit. Background Art

[0002] The rotary dehumidifier unit uses the rotation of the rotor to make the fan-shaped part of the rotary dehumidifier through which the dehumidified airflow flows dehumidify the wet air, while the remaining fan-shaped part through which the regeneration airflow flows regenerates the adsorbent at the same time. The dehumidified process airflow and the regeneration airflow flow in countercurrent, thus forming a continuous and stable dehumidification process to achieve the purpose of dehumidification.

[0003] Existing rotary dehumidifier units generally use outdoor fresh air as the regeneration air volume, which requires the arrangement of regeneration air ducts on the outside of the air-conditioning unit. This arrangement is complex in structure and occupies a large space. It is not suitable for application scenarios such as underground facilities and inner areas of large buildings where the space is small and it is not convenient to arrange external regeneration air ducts.

[0004] Therefore, it is necessary to design a mixed air type low-temperature regeneration rotary dehumidification unit to solve the problems of complex structure and large space occupation of conventional rotary dehumidification units. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a mixed air type low-temperature regenerative rotary dehumidification unit.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a mixed air type low-temperature regenerative rotary dehumidification unit, comprising a box body one and a box body two, the box body one is the air inlet side of the unit, the box body two is the air supply side of the unit, a partition board one and a partition board two are arranged in the box body one, a primary precooling coil is installed on the upper part of the partition board one, an air supply fan is installed on the partition board two, a partition board three is arranged in the middle part of the box body two, a secondary precooling coil is installed below the partition board three of the box body two, an air supply port is arranged below the partition board three of the box body two, and a heat recovery plate heat exchanger is installed above the partition board three of the box body two.

[0007] Specifically, a return air inlet and a fresh air inlet are provided on the upper portion of the box body, a first-stage precooling coil is vertically located between the return air inlet and the fresh air inlet, and a filter is provided at the front of the first-stage precooling coil.

[0008] Specifically, the partition plate 1 is arranged horizontally, and the partition plate 2 is arranged vertically at the bottom of the partition plate 1.

[0009] Specifically, the rear part of the blower is connected to the upper and lower areas of the partition three of the box body two, and a vent two is provided on the box body two and in the upper area of ​​the partition three, and a vent one is provided on the box body two and in the lower area of ​​the partition three.

[0010] Specifically, a dehumidification wheel is installed in the second box body, the upper part of the dehumidification wheel is located on the upper part of the partition three, the lower part of the dehumidification wheel is located on the lower part of the partition three, an auxiliary evaporation coil is installed behind the lower part of the dehumidification wheel, and an air supply outlet is installed behind the auxiliary evaporation coil.

[0011] Specifically, the heat recovery plate heat exchanger comprises an inlet 1, an outlet 1, an inlet 2 and an outlet 2, the inlet 1 is connected to the outlet 1, and the inlet 2 is connected to the outlet 2.

[0012] Specifically, the rear of the second vent is connected to the first inlet, a regeneration fan is installed at the rear of the first outlet, a condensing heat dissipation coil is installed at the rear of the regeneration fan, a dehumidification wheel is installed at the rear of the condensing heat dissipation coil, and the rear of the dehumidification wheel is connected to the second inlet.

[0013] The utility model has the following beneficial effects:

[0014] The regeneration air volume of the mixed-air low-temperature regenerative rotary dehumidifier unit designed by the utility model is taken from the mixed air volume of the low-temperature and low-humidity air after cooling and dehumidification by the pre-cooling coil and the return air of the processed air. After being heated by the heat recovery plate exchanger and the heating coil, it becomes high-temperature and low-humidity air, which has stronger regeneration ability, making this scheme have stronger dehumidification ability and expanding the scope of use of the low-temperature regenerative dehumidification rotary wheel.

[0015] The mixed air type low-temperature regenerative rotary dehumidifier unit designed by the utility model is arranged in sections, which is convenient for transportation and installation; the structure is compact, and the downward pressure arrangement of the heat recovery plate exchanger effectively lowers the height of the dehumidification section. The upper and lower layers of the mixed air pretreatment and the blower section shorten the length of the section and save space.

[0016] The mixed air low-temperature regenerative rotary dehumidifier unit designed in the utility model adopts a heat recovery plate heat exchanger in the regeneration air processing process, which can recover the heat in the regeneration air exhaust to preheat the regeneration air intake, thereby reducing the demand for regeneration air heating and achieving energy saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a mixed air type low-temperature regenerative rotary dehumidification unit.

[0018] In the figure: 1-return air inlet; 2-fresh air inlet; 3-partition one; 4-partition two; 5-primary pre-cooling coil; 6-filter; 7-supply fan; 8-vent one; 9-vent two; 10-partition three; 11-secondary pre-cooling coil; 12-dehumidification wheel; 13-auxiliary evaporation coil; 14-supply air outlet; 15-condensing heat dissipation coil; 16-heat recovery plate heat exchanger; 17-regeneration fan; 18-inlet one; 19-outlet one; 20-inlet two; 21-outlet two. DETAILED DESCRIPTION

[0019] 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.

[0020] Embodiment 1:

[0021] like Figure 1 As shown, a mixed air type low-temperature regenerative rotary dehumidifier unit includes a box body 1 and a box body 2. The box body 1 is the air inlet side of the unit. A partition 1 3 and a partition 2 4 are arranged in the box body 1. A primary precooling coil 5 is installed on the upper part of the partition 1 3. A return air inlet 1 and a fresh air inlet 2 are arranged on the upper part of the box body 1. The primary precooling coil 3 is vertically located between the return air inlet 1 and the fresh air inlet 2. A filter 6 is arranged in front of the primary precooling coil 3.

[0022] The partition 1 3 is arranged horizontally, and the partition 2 4 is arranged vertically at the bottom of the partition 1 3. The air blower 7 is installed on the partition 2 4.

[0023] Box body two is the air supply side of the unit, a partition three 10 is provided in the middle of box body two, a secondary precooling coil 11 is installed below the partition three 10 of box body two, an air supply port 14 is provided below the partition three 10 of box body two, and a heat recovery plate heat exchanger 16 is installed above the partition three 10 of box body two.

[0024] The rear part of the blower 7 is connected to the upper and lower areas of the partition three 10 of the box body two. A vent 2 9 is provided on the box body two and in the upper area of ​​the partition three 10, and a vent 1 8 is provided on the box body two and in the lower area of ​​the partition three 10.

[0025] A dehumidification wheel 12 is installed in the second box body, the upper part of the dehumidification wheel 12 is located on the upper part of the partition three 10, and the lower part of the dehumidification wheel 12 is located on the lower part of the partition three 10. An auxiliary evaporation coil 13 is installed behind the lower part of the dehumidification wheel 12, and an air supply port 14 is installed behind the auxiliary evaporation coil 13.

[0026] The heat recovery plate heat exchanger 16 includes an inlet 18 , an outlet 19 , an inlet 20 , and an outlet 21 . The inlet 18 is connected to the outlet 19 , and the inlet 20 is connected to the outlet 21 .

[0027] The rear of the vent 2 9 is connected to the inlet 18 , the regeneration fan 17 is installed at the rear of the outlet 19 , the condensation heat dissipation coil 15 is installed at the rear of the regeneration fan 17 , the rear of the condensation heat dissipation coil 15 is the dehumidification wheel 12 , and the rear of the dehumidification wheel 12 is connected to the inlet 20 .

[0028] Both the air supply fan 7 and the regeneration fan 17 adopt EC fans, which can adjust the air volume steplessly to meet the requirements of variable air volume.

[0029] Embodiment 2: The specific working principle of the mixed air type low temperature regeneration rotary dehumidification unit adopting the structural form of embodiment 1.

[0030] The utility model is characterized in that the regeneration air volume is taken from the mixed air volume of the low-temperature and low-humidity air after cooling and dehumidification by the first-level pre-cooling coil 5 and the return air of the processed air, and becomes high-temperature and low-humidity air after being heated by the heat recovery plate heat exchanger 16 and the heating coil. It has a stronger regeneration ability, which makes the utility model have a stronger dehumidification ability and expands the use range of the low-temperature regeneration dehumidification wheel. Its minimum supply air humidity can be as low as about 2.0g / kg, which is particularly suitable for occasions requiring lower humidity.

[0031] Different from the conventional practice, the feature of the present invention is that the regeneration air volume realizes internal circulation, and there is no need to arrange an external regeneration air duct like the conventional solution. In the present invention, the regeneration air volume is taken from the mixed air volume of the low-temperature and low-humidity air after cooling and dehumidification by the pre-cooling coil and the return air of the treated air. After the dehumidification wheel 12 is regenerated, the heat is recovered by the heat recovery plate heat exchanger 16, and after mixing with the fresh air of the treated air, it finally returns to the air inlet side of the primary pre-cooling coil 5 to complete an internal cycle. Therefore, the present invention has the advantage of easy installation, and there is no need to arrange an external regeneration air duct like the conventional solution. It is particularly suitable for application scenarios such as underground facilities and the inner areas of large buildings where it is inconvenient to arrange external regeneration air ducts.

[0032] The utility model is characterized in that a heat recovery plate heat exchanger 16 is used in the regeneration air processing process, which can recover the heat in the regeneration air exhaust to preheat the regeneration air intake, thereby reducing the demand for regeneration air heating and achieving energy saving effect.

[0033] Different from the single-stage precooling of the conventional scheme, the feature of the present invention is that two-stage precooling measures are set at different positions. In the present invention, after the fresh air with higher moisture content and the regenerated air return air merge, an external cold source (such as low-temperature chilled water with a supply and return water temperature of 7 / 12°C) first-stage precooling coil 5 is set to perform precooling and dehumidification, and then it is mixed with the processed air return air with lower moisture content, and is cooled again by the built-in independent direct expansion cold source second-stage precooling evaporating coil 11, and enters the dehumidification wheel 12 for dehumidification. Compared with the conventional scheme in which only the second-stage precooling coil 11 is set without the first-stage precooling coil 5, the processed air before entering the dehumidification wheel 12 can break through the freezing point limit of cooling and dehumidification, achieve lower pretreatment humidity, effectively reduce the dehumidification load of the dehumidification wheel 12, and achieve lower air outlet humidity. For example: the moisture content of the fresh air and regenerated return air mixed in the utility model is 15.0g / kg, and reaches 7.0g / kg (freezing point limit of cooling and dehumidification) after precooling and dehumidification. The moisture content after mixing with 3.0g / kg low-humidity processed air return air in a ratio of 1:1 is 5.0g / kg. In contrast, in the conventional scheme where only the secondary precooling coil 11 is set, the humidity of the air directly mixed with the fresh air, regenerated air return air and processed air return air is 9.0g / kg. After precooling and dehumidification by the secondary precooling coil 11, the humidity can only reach 7.0g / kg (freezing point limit of cooling and dehumidification).

[0034] The utility model is characterized in that an auxiliary evaporating coil 13 equipped with a speed-adjustable fan is arranged on the air outlet side of the wheel processing air, which constitutes a complete built-in independent direct expansion refrigeration system with the secondary pre-cooling coil 11, the condensing heat dissipation coil 15 and other refrigeration accessories. The air supply temperature of the processed air can be accurately regulated by adjusting the fan speed, or when the air inlet temperature is low in the transition season and the heat absorbed by the secondary pre-cooling coil 11 is insufficient to supply the regeneration heating demand of the condensing heat dissipation coil 15 alone, the required heat can be auxiliary absorbed.

[0035] The utility model is characterized by segmented arrangement, convenient transportation and installation; compact structure, the downward pressure arrangement of the heat recovery plate heat exchanger 16 effectively lowers the height of the dehumidification section, and the upper and lower layers of the mixed air pretreatment and blower section shorten the length of the section.

[0036] In the utility model, the condensing heat dissipation coil 15 can constitute a heat pump direct expansion device together with the secondary precooling coil 11 and the auxiliary evaporation coil 13. The condensing heat dissipation coil 15 is a condenser, and the secondary precooling coil 11 and the auxiliary evaporation coil 13 are evaporators. The primary precooling coil 5 should be connected to an external cold and heat source. In dehumidification conditions, the primary precooling coil 5 is connected to an external cold source to precool and dehumidify the treated air. In winter conditions, the primary precooling coil 5 can be connected to an external heat source to heat the treated air; at this time, adjusting the opening of the regeneration air valve can adjust the air flow through the primary precooling coil 5, thereby controlling the supply air temperature of the treated air.

[0037] Optionally, the secondary precooling coil 11 and the auxiliary evaporating coil 13 can be connected to an external cold source, and the condensing heat dissipating coil 15 can be connected to an external heat source for regeneration.

[0038] Optionally, in actual application, if the pressure of the air supply fan 7 is sufficient to overcome the resistance of the regeneration air channel, the regeneration air duct booster fan (regeneration fan 17) can be eliminated to make the unit structure simpler.

[0039] 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.

[0040] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A mixed air type low temperature regenerative rotary dehumidifier unit, characterized in that: It includes box body 1 and box body 2, box body 1 is the air inlet side of the unit, box body 2 is the air supply side of the unit, partition board 1 and partition board 2 are arranged in box body 1, a primary precooling coil is installed on the upper part of partition board 1, a blower is installed on partition board 2, a partition board 3 is arranged in the middle part of box body 2, a secondary precooling coil is installed under the partition board 3 of box body 2, an air supply port is arranged under the partition board 3 of box body 2, and a heat recovery plate heat exchanger is installed above the partition board 3 of box body 2.

2. The mixed air type low temperature regeneration rotary dehumidifier unit according to claim 1 is characterized in that: The upper part of the box body 1 is provided with a return air inlet and a fresh air inlet, the first-level precooling coil is vertically located between the return air inlet and the fresh air inlet, and a filter is arranged in front of the first-level precooling coil.

3. The mixed air type low temperature regeneration rotary dehumidifier unit according to claim 1 is characterized in that: The partition plate 1 is arranged horizontally, and the partition plate 2 is arranged vertically at the bottom of the partition plate 1.

4. The mixed air type low temperature regeneration rotary dehumidifier unit according to claim 1 is characterized in that: The rear part of the blower is connected to the upper and lower areas of the partition three of the box body two. A ventilating opening two is provided on the box body two and in the upper area of ​​the partition three, and a ventilating opening one is provided on the box body two and in the lower area of ​​the partition three.

5. The mixed air type low temperature regeneration rotary dehumidifier unit according to claim 1 is characterized in that: A dehumidification wheel is installed in the second box body, the upper part of the dehumidification wheel is located on the upper part of the third partition, the lower part of the dehumidification wheel is located on the lower part of the third partition, an auxiliary evaporation coil is installed behind the lower part of the dehumidification wheel, and an air supply port is installed behind the auxiliary evaporation coil.

6. The mixed air type low temperature regeneration rotary dehumidifier unit according to claim 4, characterized in that: The heat recovery plate heat exchanger comprises an inlet 1, an outlet 1, an inlet 2 and an outlet 2, wherein the inlet 1 is connected to the outlet 1, and the inlet 2 is connected to the outlet 2.

7. The mixed air type low temperature regeneration rotary dehumidifier unit according to claim 6 is characterized in that: The rear of the second vent is connected to the first inlet, a regeneration fan is installed at the rear of the first outlet, a condensation heat dissipation coil is installed at the rear of the regeneration fan, a dehumidification wheel is installed at the rear of the condensation heat dissipation coil, and the rear of the dehumidification wheel is connected to the second inlet.

Images