Recirculating evaporative cooling air conditioning unit

Abstract

The utility model discloses a recirculation evaporative cooling air conditioning unit, and mainly relates to the field of evaporative cooling refrigeration. Comprising a unit body composed of an upper box body and a lower box body, an indirect evaporative cooling device, a heat pipe heat exchanger condensation end, a rotary dehumidifier regeneration part and an exhaust fan are sequentially arranged in the upper box body in the air circulation direction, and an air outlet of the exhaust fan is connected with an opening in the end, away from an air return pipeline, of the upper box body and blows air to the outside of the upper box body. An air supply fan, a rotary dehumidifier dehumidification part, a heat pipe heat exchanger evaporation end and a direct evaporation cooling device are sequentially arranged in the lower box body in the air circulation direction, the air outlet direction of the air supply fan faces the air supply pipeline, and a return air reheating loop is further arranged on the upper box body. The rotary dehumidifier has the advantages that after return air is indirectly evaporated and cooled, the heat pipe technology is combined to precool fresh air, after the return air is heated through the reheating loop, adsorption materials of the rotary dehumidifier are regenerated, and the rotary dehumidifier is dual-purpose, energy-saving, environment-friendly and good in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of evaporative cooling refrigeration, and specifically relates to a recirculation evaporative cooling air conditioning unit. BACKGROUND

[0002] In the northwest low-humidity environment, evaporative cooling refrigeration technology has been widely used. However, in the southeast coastal areas of China, due to high air humidity and outdoor weather conditions, it is difficult to work stably by simply relying on evaporative cooling, especially for places with special requirements for air supply temperature and humidity, which is not applicable, and new technology is urgently needed to expand the use of natural energy.

[0003] The rotary dehumidifier continuously rotates the rotary wheel to dehumidify the humid air and regenerate the adsorption material, so that the dehumidification and regeneration work can be continuously carried out. The regeneration of the rotary dehumidifier usually requires steam or other heat sources, and the regeneration cost is relatively high. On the other hand, if a solar heat collector is used to provide regeneration for the rotary dehumidifier, it can consume very little electric energy to regenerate the adsorption material of the rotary dehumidifier. If it is combined with the evaporative cooling equipment, it will be more energy-saving and environmentally friendly. SUMMARY

[0004] The utility model discloses a recirculation evaporative cooling air conditioning unit, which uses the indirect evaporative cooling of return air to pre-cool fresh air by using heat pipe technology, and uses the reheating circuit to heat the return air, thereby regenerating the adsorption material of the rotary dehumidifier. The utility model has the advantages of one machine with two functions, energy saving and environmental protection, and good practicability.

[0005] In order to achieve the above-mentioned purpose, the following technical solutions are adopted:

[0006] A recirculation evaporative cooling air conditioning unit, comprising a unit main body composed of an upper box body and a lower box body, the upper box body and the lower box body are both open at both ends, one end of the upper box body is connected with the indoor thermal environment through a return air pipeline, one end of the lower box body is connected with the indoor thermal environment through a supply air pipeline, the upper box body is provided with an indirect evaporative cooling device, a heat pipe heat exchanger condensing end, a rotary dehumidifier regeneration part and an exhaust fan in sequence along the air flow direction, the exhaust fan outlet is connected with the opening of the upper box body away from the return air pipeline and blows air to the outside of the upper box body, the lower box body is provided with a supply air fan, a rotary dehumidifier dehumidification part, a heat pipe heat exchanger evaporation end and a direct evaporative cooling device in sequence along the air flow direction, the air outlet direction of the supply air fan is towards the supply air pipeline, and the upper box body is further provided with a return air reheating circuit.

[0007] Further, the connection between the return air pipeline and the upper box body and the opening of the lower box body away from the supply air pipeline are both provided with a primary filter.

[0008] Further, the return air pipeline is further provided with a bypass air outlet, and the bypass air outlet is provided with an air valve.

[0009] Further, the indirect evaporative cooling device comprises an indirect evaporative cooling water tank arranged at the inner bottom of the upper cabinet, one side of the indirect evaporative cooling water tank is provided with an indirect evaporative cooling water pump, the inner top of the upper cabinet is provided with an indirect evaporative cooling spray row, the indirect evaporative cooling water pump and the indirect evaporative cooling spray row are connected through pipelines, the top of the indirect evaporative cooling spray row is provided with an indirect evaporative air outlet penetrating through the top of the upper cabinet, and an air exhaust fan is arranged at the indirect evaporative air outlet.

[0010] Further, the indirect evaporative cooling device comprises an indirect evaporative cooling water tank arranged at the inner bottom of the upper cabinet, one side of the indirect evaporative cooling water tank is provided with an indirect evaporative cooling water pump, the inner top of the upper cabinet is provided with an indirect evaporative cooling spray row, the indirect evaporative cooling water pump and the indirect evaporative cooling spray row are connected through pipelines, the top of the indirect evaporative cooling spray row is provided with an indirect evaporative air outlet penetrating through the top of the upper cabinet, and an air exhaust fan is arranged at the indirect evaporative air outlet.

[0011] Further, the return air reheating circuit comprises a solar heat collector arranged at the top of the upper cabinet, and an air reheater is arranged in the upper cabinet and forms a circulating passage with the solar heat collector through a reheating pipeline, and an auxiliary heater and a reheating water pump are arranged on the reheating pipeline.

[0012] Further, the air reheater is arranged between the condensing end of the heat pipe heat exchanger and the regeneration part of the rotary dehumidifier.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] In the cooling condition in summer, the indoor return air is pre-cooled by the indirect evaporative cooling device and the condensing end of the heat pipe heat exchanger, the indoor return air after heat exchange of the condensing end of the heat pipe heat exchanger is heated by the return air reheating circuit, and the adsorption material of the rotary dehumidifier is regenerated. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACHED Figure 1 It is the structure schematic diagram of the utility model.

[0016] The reference signs shown in the drawings are as follows:

[0017] 1, indoor thermal environment; 2, upper box; 3, lower box; 4, return air duct; 5, air supply duct; 6, heat pipe heat exchanger condensing end; 7, rotary dehumidifier regeneration part; 8, exhaust fan; 9, air supply fan; 10, rotary dehumidifier dehumidification part; 11, heat pipe heat exchanger evaporation end; 12, primary filter; 13, bypass air port; 14, ventilation valve; 15, indirect evaporative cooling water tank; 16, indirect evaporative cooling water pump; 17, indirect evaporative cooling spray row; 18, indirect evaporative cooling air outlet; 19, exhaust fan; 20, direct evaporative cooling water tank; 21, direct evaporative cooling water pump; 22, direct evaporative cooling spray row; 23, evaporative cooling core; 24, solar heat collector; 25, reheating pipeline; 26, air reheater; 27, auxiliary heater; 28, reheating water pump. DETAILED DESCRIPTION

[0018] The utility model discloses a further illustrate the utility model below in combination with specific embodiment. It is understood that these embodiments are only for illustrating the utility model and are not for limiting the scope of the utility model. In addition, it is understood that after reading the content taught by the utility model, the person skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the present application.

[0019] The utility model discloses a kind of recirculation evaporative cooling air conditioning unit, main body structure includes by upper box 2 and lower box 3 The unit main body of being composed, the upper box 2, lower box 3 It is two-end opening structure, the upper box 2 one end opening is connected with indoor thermal environment 1 by return air duct 4, and the return air of indoor thermal environment 1 is discharged after entering the upper box 2 by return air duct 4, the lower box 3 one end opening is connected with indoor thermal environment 1 by air supply duct 5, and new air in outside is sent into indoor thermal environment 1 by air supply duct 5 after being cooled by heat exchange in lower box 3, the upper box 2 is sequentially provided with indirect evaporative cooling device, heat pipe heat exchanger condensing end 6, rotary dehumidifier regeneration part 7 and exhaust fan 8 along air flow direction, the air outlet of exhaust fan 8 is connected with the opening of the upper box 2 away from return air duct 4 one end and blows air to the outside of the upper box 2, the lower box 3 is sequentially provided with air supply fan 9, rotary dehumidifier dehumidification part 10, heat pipe heat exchanger evaporation end 11 and direct evaporative cooling device along air flow direction, the air outlet direction of air supply fan 9 is towards air supply duct 5, wherein, heat pipe heat exchanger and rotary dehumidifier are arranged in the side adjacent to upper box 2 and lower box 3, heat pipe heat exchanger condensing end 6 and rotary dehumidifier regeneration part 7 are located in the upper box 2, rotary dehumidifier dehumidification part 10, heat pipe heat exchanger evaporation end 11 are located in the lower box 3, in addition to this, other structures are separately arranged in the box, the upper box 2 is also provided with return air reheating loop, wherein,

[0020] The heat pipe heat exchanger is a gravity type heat pipe, mainly composed of a pipe core, a pipe shell and a working medium. The heat pipe is internally provided with a wick, which is filled with liquid working medium. When heat is transferred into the heat pipe heat exchanger evaporation end 11, the working medium absorbs heat and evaporates into a gaseous state and flows to the heat pipe heat exchanger condensation end 6. When the medium steam in the heat pipe heat exchanger condensation end 6 is cooled, latent heat of vaporization is released, and the gaseous working medium condenses into a liquid and then returns to the heat pipe heat exchanger evaporation end 11 under the action of gravity of the wick. The above process is repeated to realize efficient heat transfer through phase change and mass transfer of the working medium.

[0021] And a rotary dehumidifier, when fresh air passes through the dehumidification area, the moisture in the air is absorbed by the adsorbent material, and a large amount of adsorption heat is released at the same time. Therefore, the temperature of the fresh air will rise while the humidity of the fresh air is reduced. With the increase of adsorbed water, the adsorbent material in the dehumidification area of the rotary dehumidifier will gradually tend to be saturated. In order to maintain the dehumidification capacity, the saturated rotary dehumidifier slowly rotates into the regeneration area under the drive of the transmission device. At the same time, the return air first passes through heating and then passes through the regeneration area, so that the water in the adsorbent material is desorbed, thereby restoring the dehumidification capacity of the rotary dehumidifier. The rotary dehumidifier rotates continuously to dehumidify the humid air and regenerate the adsorbent material, so that the dehumidification and regeneration work can be continuously carried out. The adsorbent material of the rotary dehumidifier adopts a honeycomb structure, which increases the surface area of the adsorbent material in contact with air, thereby improving the dehumidification capacity. The adsorbent material can be selected from lithium chloride, silica gel and molecular sieve;

[0022] The upper box 2 part, the indoor return air enters the indirect evaporative cooling device after entering the upper box 2 from the return air pipeline 4, and the temperature of the air after the indirect evaporative cooling is lower. The low-temperature air then enters the heat pipe heat exchanger condensation end 6, exchanges heat with the gaseous working medium in the pipe, and the temperature of the return air is increased. The working medium in the pipe condenses into a liquid and enters the heat pipe heat exchanger evaporation end 11 through the liquid pipe. After being heated by the return air reheating circuit, the temperature of the return air reaches the regeneration temperature standard of the adsorbent material of the rotary dehumidifier, enters the regeneration part 7 of the rotary dehumidifier, and realizes regeneration of the adsorbent material of the rotary dehumidifier. Finally, the indoor return air is discharged from the upper box 2 under the action of the exhaust fan 8.

[0023] The lower box 3 part, the outdoor environment fresh air enters the dehumidification part 10 of the rotary dehumidifier from the opening away from the air supply pipeline 5 at one end of the lower box 3 under the action of the air supply fan 9. Under the action of the rotary dehumidifier, the humidity of the fresh air is reduced while the adsorption heat is generated. The fresh air is in a high-temperature and low-humidity state. The high-temperature and low-humidity fresh air enters the heat pipe heat exchanger evaporation end 11, exchanges heat with the liquid working medium in the pipe, and the temperature of the fresh air is reduced. The working medium in the pipe evaporates into a gaseous state and enters the heat pipe heat exchanger condensation end 6 through the gas pipe. The temperature of the fresh air is reduced again after entering the direct evaporative cooling device, and the humidity is processed to the indoor required humidity and then sent into the indoor through the air supply pipeline 5.

[0024] Preferably, the return air duct 4 is provided with a primary filter 12 at the connection with the upper cabinet 2 and at the opening of the lower cabinet 3 away from the air supply duct 5.

[0025] Preferably, the return air duct 4 is further provided with a bypass air inlet 13 for supplying fresh air into the return air duct 4, and a ventilation valve 14 is arranged at the bypass air inlet 13. The indoor thermal environment return air enters the unit main body through the return air duct 4. When the humidity and temperature of the fresh air is lower than the wet bulb temperature of the return air, the ventilation valve 14 can be appropriately opened to adjust the mixing ratio of the fresh air and the return air by controlling the ventilation valve 14.

[0026] Preferably, the indirect evaporative cooling device comprises an indirect evaporative cooling water tank 15 arranged at the bottom of the upper cabinet 2. An indirect evaporative cooling water pump 16 is arranged at one side of the indirect evaporative cooling water tank 15. An indirect evaporative cooling spray row 17 is arranged at the top of the upper cabinet 2. The indirect evaporative cooling water pump 16 and the indirect evaporative cooling spray row 17 are connected by a pipeline. An indirect evaporative air outlet 18 penetrating through the top of the upper cabinet 2 is arranged at the top of the indirect evaporative cooling spray row 17. An air exhaust fan 19 is arranged at the indirect evaporative air outlet 18. The return air or the mixed gas of the return air and the fresh air from the bypass air inlet 13 enters the indirect evaporative cooling device. A part of the air directly contacts the spray water of the indirect evaporative cooling spray row 17, and then is discharged from the upper cabinet 2 through the indirect evaporative air outlet 18 under the action of the air exhaust fan 19. The cold energy generated by the direct evaporative cooling of the part of the air and the water is used to indirectly cool the other part of the air entering from the other side, so as to cool and dehumidify the other part of the air. The cold water of the indirect evaporative cooling spray row 17 falls into the indirect evaporative cooling water tank 15 after the heat and humidity exchange with the part of the air at the other side of the partition, and is sprayed by the indirect evaporative cooling spray row 17 again under the action of the indirect evaporative cooling water pump 16, so as to complete the evaporative cooling cycle.

[0027] Preferably, the direct evaporative cooling device comprises a direct evaporative cooling water tank 20 arranged at the bottom of the lower cabinet 3, a direct evaporative cooling water pump 21 arranged at one side of the direct evaporative cooling water tank 20, a direct evaporative cooling spray row 22 arranged at the top of the lower cabinet 3, the direct evaporative cooling water pump 21 and the direct evaporative cooling spray row 22 being connected by a pipeline, and an evaporative cooling core 23 arranged between the direct evaporative cooling water tank 20 and the direct evaporative cooling spray row 22. The evaporative cooling core 23 can be formed by alternately stacking PVC sheets, high-strength corrosion-resistant and fire-retardant corrugated paper sheets, etc., with a sheet spacing of 2.0 mm, 3.0 mm, 4.0 mm, etc., and the sheets are alternately stacked in the form of a cube or a cuboid. Fresh air exchanges heat and mass with cold water from the direct evaporative cooling spray row 22 in the evaporative cooling core 23, and the evaporated cold water cools the fresh air. The cooled fresh air is then sent out of the unit. The cold water from the direct evaporative cooling spray row 22 falls into the direct evaporative cooling water tank 20 after passing through the evaporative cooling core 23, and is sprayed into the evaporative cooling core 23 by the direct evaporative cooling spray row 22 again under the action of the direct evaporative cooling water pump 21, thus completing the direct evaporative cooling cycle.

[0028] Preferably, the return air reheating circuit comprises a solar heat collector 24 arranged at the top of the upper cabinet 2, an air reheater 26 arranged in the upper cabinet 2 and forming a circulation passage with the solar heat collector 24 through a reheating pipeline 25, an auxiliary heater 27 and a reheating water pump 28 arranged on the reheating pipeline 25, and the air reheater 26 being arranged between the condensing end 6 of the heat pipe heat exchanger and the regeneration part 7 of the rotary dehumidifier. The return air reheating circuit uses the solar heat collector 24 to heat the medium inside. Since solar energy is intermittent and unstable, an auxiliary heater 27 is additionally provided. When the solar heat collector 24 cannot meet the return air reheating demand, the auxiliary heater 27 inside the heating pipe is used for auxiliary heating, and the heated medium is sent to the air reheater 26 through the reheating pipeline 25 under the action of the reheating water pump 28, so as to heat the air reheater 26 and finally reheat the indoor return air cooled by the indirect evaporative cooling device, so as to meet the regeneration temperature standard of the rotary dehumidifier adsorbent.

[0029] The present patent can not only use the rotary dehumidifier to dehumidify fresh air, but also use the heat pipe heat exchanger to pre-cool fresh air, and then use the direct evaporative cooling device to cool and dehumidify fresh air to meet the indoor cooling demand, thus realizing one machine with two functions, energy saving and environmental protection, and having good practicability.

Claims

1. A recirculating evaporative cooling air conditioning unit characterized by: The application relates to a heat exchange device for a heat pump air conditioning system, which comprises a main body composed of an upper box (2) and a lower box (3), wherein the upper box (2) and the lower box (3) are both open at both ends, one end of the upper box (2) is connected with an indoor thermal environment (1) through a return air duct (4), one end of the lower box (3) is connected with the indoor thermal environment (1) through a supply air duct (5), an indirect evaporative cooling device, a heat pipe heat exchanger condensing end (6), a rotary dehumidifier regeneration part (7) and an exhaust fan (8) are sequentially arranged in the upper box (2) along an air flow direction, an air outlet of the exhaust fan (8) is connected with an opening of the upper box (2) far from the one end of the return air duct (4) and blows air to the outside of the upper box (2), a supply air fan (9), a rotary dehumidifier dehumidification part (10), a heat pipe heat exchanger evaporation end (11) and a direct evaporative cooling device are sequentially arranged in the lower box (3) along the air flow direction, an air outlet direction of the supply air fan (9) is towards the supply air duct (5), and a return air reheating loop is further arranged on the upper box (2).

2. A recirculating evaporative cooling air conditioning unit as defined in claim 1, wherein: An initial filter (12) is arranged at a connecting position of the return air duct (4) and the upper box (2) and at an opening position of the lower box (3) far from the one end of the supply air duct (5).

3. A recirculating evaporative cooling air conditioning unit as set forth in claim 1 wherein: A bypass air outlet (13) is further arranged on the return air duct (4), and an air vent valve (14) is arranged on the bypass air outlet (13).

4. The recirculating evaporative cooling air conditioning unit of claim 1, wherein: The indirect evaporative cooling device comprises an indirect evaporative cooling water tank (15) arranged on the bottom of the upper box (2), an indirect evaporative cooling water pump (16) arranged on one side of the indirect evaporative cooling water tank (15), an indirect evaporative cooling spray row (17) arranged on the top of the upper box (2), a pipeline connection between the indirect evaporative cooling water pump (16) and the indirect evaporative cooling spray row (17), an indirect evaporative air outlet (18) penetrating through the top of the upper box (2) arranged on the top of the indirect evaporative cooling spray row (17), and an exhaust fan (19) arranged at the indirect evaporative air outlet (18).

5. A recirculating evaporative cooling air conditioning unit as set forth in claim 1 wherein: The direct evaporative cooling device comprises a direct evaporative cooling water tank (20) arranged on the bottom of the lower box (3), a direct evaporative cooling water pump (21) arranged on one side of the direct evaporative cooling water tank (20), a direct evaporative cooling spray row (22) arranged on the top of the lower box (3), a pipeline connection between the direct evaporative cooling water pump (21) and the direct evaporative cooling spray row (22), and an evaporative cooling core (23) arranged between the direct evaporative cooling water tank (20) and the direct evaporative cooling spray row (22).

6. A recirculating evaporative cooling air conditioning unit as set forth in claim 1 wherein: The return air reheating loop comprises a solar heat collector (24) arranged on the top of the upper box (2), an air reheater (26) arranged in the upper box (2) and forming a circulating passage with the solar heat collector (24) through a reheating pipeline (25), an auxiliary heater (27) and a reheating water pump (28) arranged on the reheating pipeline (25).

7. A recirculating evaporative cooling air conditioning unit as claimed in claim 6, wherein: The air reheater (26) is arranged between the heat pipe heat exchanger condensing end (6) and the rotary dehumidifier regeneration part (7).

Images