CN114893834A - Air source heat pump fresh air unit based on solution moisture absorption - Google Patents

Abstract

The invention discloses an air source heat pump fresh air handling unit based on solution moisture absorption, which comprises a shell, wherein a partition plate is arranged on the inner side of the shell, the inner side of the shell is divided into a region A, a region B, a region C and a region D through the partition plate, and an air-air heat exchange core body is arranged at the adjacent centers of the region A, the region B, the region C and the region D. This air source heat pump fresh air unit based on solution moisture absorption, when refrigerating in summer, only under high humid environment, just need start compression refrigeration, utilize indirect evaporative cooling to provide cold wind in summer, compare energy-conservation more than 40% with prior art, when heating in winter, utilize the concentrated solution moisture absorption, not only absorb the sensible heat in the follow air, still absorb the latent heat in the air, do not have air source heat pump unit's defrosting problem. The air source heat pump unit is also provided with a humidifying section, is particularly suitable for being used in dry areas in the north, has lower operation energy consumption, greatly reduces the operation energy consumption of the traditional air source heat pump unit, is energy-saving and environment-friendly, and has strong practicability.

Description

An air source heat pump fresh air unit based on solution moisture absorption

technical field

The invention relates to the technical field of air source heat pumps, in particular to an air source heat pump fresh air unit based on solution moisture absorption.

Background technique

With the development of economic construction, especially various precision processing industries, garment factories, grain processing enterprises, etc. need to provide cooling or heating for factory buildings. When cooling or heating these areas, traditional chilled water (heat pump) units and combined air-conditioning units are often required. The operation mode is single, the energy consumption is huge, and the operation and maintenance costs are high. At the same time, air source heat pump units have been applied on a large scale in the north. When there are low environmental conditions, the heating capacity and COP of the air source heat pump units are greatly attenuated, and there are problems of frosting and defrosting, so it is often necessary to configure corresponding auxiliary Heat source, the initial investment of equipment is high, and the operation is not energy-saving.

Under the background of carbon peaking and carbon neutrality proposed by the state, it is necessary to make full use of natural cold sources, and do a good job in cold recovery or heat recovery. It can be combined with indirect evaporation through solution dehumidification to cool (heat) large spaces such as workshops, so as to meet the needs of Production process needs or modifications to the work environment.

The indirect evaporative cooling air-conditioning technology uses the evaporation of water as a cooling method, uses the working airflow to cool the fresh air, and produces cold air through the indirect contact between the air and the water. At present, this technology has been widely used in the low-humidity environment of Northwest China.

In the southeastern coastal areas of my country, due to the high relative humidity of the air and the limitation of outdoor weather conditions, it is not easy to achieve stable working conditions simply by using indirect evaporative cooling, so further technological innovation is required.

Most of the indirect evaporative air-conditioning units in China only have a cooling function. When heating is required in winter, traditional heating and heating methods are also required, so cooling and heating can be combined.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an air source heat pump fresh air unit based on solution moisture absorption, so as to solve the problems raised in the above background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a kind of air source heat pump fresh air unit based on solution moisture absorption, comprising a casing, the inner side of the casing is provided with a partition, and the inner side of the casing is divided into areas A, Area B, Area C, Area D, said Area A, Area B, Area C, Area D are all provided with tuyere near the casing side, in the adjacent center of said Area A, Area B, Area C, Area D There is an air-to-air heat exchange core body, the area A communicates with the area C through the air-to-air heat exchange core body to form a return air channel, and the area B communicates with the area D through the air-to-air heat exchange core body to form a fresh air channel;

A titanium tube heat exchanger is arranged inside the area A;

A solution dehumidification section is arranged inside the area B;

The inside of the area C is provided with components such as a solution regeneration section and a refrigeration compressor;

A return air humidification section is arranged inside the area D.

Preferably, the refrigerating device includes a titanium tube heat exchanger, and a circulating conduit is arranged inside the titanium tube heat exchanger, and the circulating conduit passes through the titanium tube heat exchanger and is connected to the compressor and the second condenser. A first condenser is connected to one side of the machine, and an expansion valve and a drying filter are arranged on the circulating conduit.

Preferably, the solution dehumidification section includes a solution dehumidification core body, a solution dehumidification spray row is arranged above the solution dehumidification core body, and a dehumidification solution pool is arranged below the solution dehumidification core body, located in the area B tuyere A fresh air blower is arranged at the place, and the fresh air blower is facing the solution dehumidifying core.

Preferably, the solution dehumidification section is communicated with the solution regeneration section through an overflow pipeline.

Preferably, the top of the solution dehumidification section is provided with a bypass ventilation valve penetrating the casing.

Preferably, the solution regeneration section includes a regeneration core body, a regeneration spray row is arranged above the regeneration core body, and a solution regeneration pool is arranged below the regeneration core body, and the solution regeneration pool is provided with a solution regeneration pump. It communicates with the regeneration spray row.

Preferably, a sewage pipeline is arranged at the bottom of the regeneration solution tank, and a sewage electromagnetic valve is arranged on the sewage pipeline.

Preferably, the return air humidification section includes a humidification core body, a humidification spray row is arranged above the humidification core body, and a humidification pool below the humidification core body is provided with a humidification spray row in communication with the humidification spray row. Humidification pump.

Preferably, the humidification pool water supply pipeline and the water supply solenoid valve.

Preferably, an indirect evaporative spray row connected to a water source is provided above the side of the air-to-air heat exchange core body close to the solution dehumidification section.

Compared with the prior art, the beneficial effects of the present invention are: compared with the existing air source heat pump, the air source heat pump fresh air unit based on solution moisture absorption needs to start the compression only in a high humidity environment during summer cooling. In summer, indirect evaporative cooling is used to provide cold air, which saves energy by more than 40% compared with the existing technology. When heating in winter, concentrated solution is used to absorb moisture, not only sensible heat, but also latent heat in the air is absorbed from the air. Defrost problem of source heat pump unit. Compared with the existing air source heat pump, it is also equipped with a humidification section, which is especially suitable for use in dry areas in the north. practicability.

Description of drawings

1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the present invention.

In the picture: 1. Shell, 2. Solution pipeline, 3. Solution dehumidification spray row, 4. Solution dehumidification core, 5. Indirect evaporation spray row, 6. Fresh air blower, 7. Fresh air filter, 8. Fresh air Air inlet, 9. Dehumidification solution pool, 10. Dissolving and humidifying spray row, 11. Humidification core, 12. Return air blower, 13. Fresh air outlet, 14. Humidification pump, 15. Water replenishment solenoid valve, 16. Humidification pool , 17, indirect evaporative spray pump, 18, second condenser, 19, second refrigeration solenoid valve, 20, overflow pipeline, 21, circulation conduit, 22, compressor, 23, first refrigeration solenoid valve, 24 , Air-to-air heat exchange core, 25, Titanium tube heat exchanger, 26, Expansion valve, 27, Dry filter, 28, First condenser, 29, Solution regeneration pump, 30, Sewage solenoid valve, 31, Solution regeneration tank , 32, solution dehumidification pump, 33, fresh air outlet, 34, regeneration core, 35, regeneration spray row, 36, return air inlet, 37, return air filter, 38, ventilation valve.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figure 1-2, the present invention provides a technical solution:

As shown in Figure 1, an air source heat pump fresh air unit based on solution moisture absorption, the inner side of the shell 1 is divided into four areas: area A, area B, area C, and area D through partitions, area A, area B, area C The area D is provided with air outlets on one side close to the casing, the area A corresponds to the return air inlet 36, the area B corresponds to 8 fresh air inlets, the area C corresponds to the fresh air outlet 13, and the area D corresponds to the fresh air outlet 33. An air-to-air heat exchange core 24 is arranged at the adjacent centers of the regions A, B, C, and D. The region A communicates with the region C through the air-to-air heat exchange core 24 to form an air inlet channel, and the region B passes the air-to-air heat exchange. The core body 24 communicates with the area D to form an air outlet channel.

As shown in Figure 2, an air source heat pump fresh air unit based on solution moisture absorption includes an organic unit casing 1, and the casing 1 is respectively provided with a return air inlet and outlet and a fresh air inlet and outlet. The shell 1 is provided with a fresh air filter 7, a fresh air blower 6, a solution dehumidification section, an air-to-air heat exchange core 24, a first condenser 28, and a solution regeneration section according to the flow direction of the fresh air entering. The housing 1 is provided with a return air filter 37, an air-to-air heat exchange core 24, a second condenser 18, a return air humidifying section and a return air blower 12, etc., respectively, according to the flow direction after the return air enters; There is also a dehumidification and refrigeration system inside, including a compressor 22, a titanium tube heat exchanger 25, an expansion valve 26 and a drying filter 27, etc.

The solution regeneration section includes a regeneration core 34, a regeneration spray row 35 is arranged above the regeneration core 34, and a solution regeneration pool 31 is arranged below the regeneration core 34. The solution regeneration pool 31 is connected to the regeneration spray by the solution regeneration pump 29. Row 35 is connected. The regeneration solution tank 31 is provided with a sewage pipeline, and a sewage solenoid valve 30 is installed on the sewage pipeline. The solution regeneration tank 31 is also connected with the overflow pipeline 20 and the dehumidification solution tank 9 in the solution dehumidification section.

The solution dehumidification section is provided with a solution dehumidification spray row 3, a solution dehumidification core 4, a dehumidification solution pool 9, etc. The dehumidification solution pool 9 is also connected with the overflow pipeline 20 and the solution regeneration pool 31 of the solution regeneration section. The dehumidifying section is also provided with a bypass ventilation valve 38, which is used for bypassing the fresh air during heating in winter.

In the dehumidification and refrigeration system, there are a compressor 22, a first condenser 28, a second condenser 18, a titanium tube heat exchanger 25, an expansion valve 26 and a drying filter 27, etc., and the compressor 22 is respectively connected through the exhaust pipeline. To two condensers, a first refrigeration solenoid valve 23 is provided on the exhaust line of the first condenser 28, and a second refrigeration solenoid valve 19 is provided on the exhaust line of the second condenser 18, forming a complete Refrigeration system, used for air source heat pump fresh air unit suction, dehumidification and air heating.

The return air humidification section is provided with a humidification spray row 10, a humidification core 11, and a humidification pool 16. The humidification pool 16 is provided with a humidification pump 14, a water supply pipeline and a water supply solenoid valve 15. An indirect evaporative spray pump 17 is also provided in the humidification pool 16 , and the indirect evaporative spray pump 17 communicates with the indirect evaporative spray row 5 .

working principle:

Summer cooling conditions:

After the fresh air enters from the fresh air inlet 8 and is filtered by the fresh air filter 17, under the action of the fresh air blower 12, it passes through the solution dehumidification core 4 in the solution dehumidification section, and is replaced by the titanium tube under the action of the solution dehumidification pump 32. After the temperature of the heater 25 is lowered, the concentrated solution sprayed from the solution dehumidification spray row 3 undergoes heat and moisture exchange in the solution dehumidification core 4 . In the air heat exchange core 4, the fresh air from the outside exchanges heat with the return air, and the air-to-air heat exchange core 24 is divided into a wet channel and a dry channel. The wet channel carries fresh air and the dry channel has return air. The indoor return air enters the unit through the return air inlet 36 and enters the air-to-air heat exchange core 24 after being filtered by the return air filter 37 . There is also an indirect evaporative spray row 5 on the return air side of the air-to-air heat exchange core 24, which utilizes the evaporation of water in the wet passage in a low-humidity environment to cool the return air in the dry passage.

If the return air after the cooling needs to be humidified, in the return air humidification section, the return air and the water sprayed by the dissolving and humidifying spray row 10 under the action of the humidification pump 14 are subjected to heat and moisture exchange in the humidifying core 11, and the return air is heated and humidified. After the humidity increases, it is sent to the room through the fresh air outlet 13 through the return air blower 12 .

After the fresh air is dehumidified, the formed dilute solution falls into the dehumidification solution pool 9. After the solution in the dehumidification solution pool 9 is full, it enters the solution regeneration pool 31 of the solution regeneration section through the overflow pipeline 20. In the solution regeneration section, the diluted solution is in the solution. Under the action of the regeneration pump 29, through the regeneration spray row 35, the regeneration core 34 exchanges heat and moisture with the fresh air heated by the first condenser 28 from the outside to realize the concentrated regeneration of the solution, and finally the fresh air passes through the fresh air outlet. 33 Discharge the unit.

Heating conditions in winter:

After the fresh air enters from the fresh air inlet 8 and is filtered by the fresh air filter 17, under the action of the fresh air blower 12, it passes through the solution dehumidification core 4 in the solution dehumidification section, and passes through the solution pipe 2 under the action of the solution dehumidification pump 32. Extending to the area A, the concentrated solution sprayed from the solution dehumidification spray row 3 after being cooled by the titanium tube heat exchanger 25 is subjected to heat and moisture exchange in the solution dehumidification core 4, and after the heat in the air is transferred to the solution, the fresh air passes through. The bypass vent valve 38 exits the unit.

The indoor return air enters the unit through the return air inlet 36, and then enters the air-to-air heat exchange core 24 after being filtered by the return air filter 37. At this time, the air-to-air heat exchange core 24 does not work, and the return air after the empty heat exchange core 24 is discharged. The air enters the second condenser 18 and is heated by the heat transferred from the compressor 22. If the return air needs to be humidified, then in the return air humidification section, the return air and the humidification pump 14 will pass through the dissolving and humidifying spray discharge. 10. The water sprayed in the humidification core 11 undergoes heat and moisture exchange, and after the humidity of the return air increases, it is sent to the room through the fresh air outlet 13 through the return air blower 12.

Solution concentration process:

When the solution is concentrated, the bypass ventilation valve 38 is closed, and the fresh air is temporarily heated through the air-to-air heat exchange core 24 for solution regeneration.

After the fresh air is about to absorb moisture, the formed dilute solution falls into the dehumidifying solution pool 9. When the solution in the dehumidifying solution pool 9 is full, it enters the solution regeneration pool 31 of the solution regeneration section through the overflow pipeline 20. In the solution regeneration section, under the action of the solution regeneration pump 29, the dilute solution passes through the regeneration spray row 35, and the regeneration core 34 exchanges heat and moisture with the fresh air heated by the first condenser 28 from the outside to realize the solution. Finally, the fresh air is discharged from the unit through the fresh air outlet 33.

Refrigeration system process:

Under the action of the compressor 22, in the summer cooling condition, the first refrigeration solenoid valve 23 is opened, and the second refrigeration solenoid valve 19 is closed. After the high temperature and high pressure refrigerant gas enters the first condenser 28, the refrigerant gas condenses into liquid After passing through the drying filter 27, it enters the expansion valve 26 for throttling and depressurization, and enters the titanium tube heat exchanger 25. After absorbing the heat of the solution in the titanium tube heat exchanger 25 to cool the solution, the refrigerant liquid evaporates to form a refrigerant gas, Returning to compressor 22 again, a complete refrigeration cycle is formed. In the winter heating condition, the first refrigeration solenoid valve 23 is closed, the second refrigeration solenoid valve 19 is opened, and the high-temperature and high-pressure refrigerant gas enters the second condenser 18 to heat the indoor return air, and the refrigerant gas condenses into liquid. After drying the filter 27, it enters the expansion valve 26 for throttling and depressurization, and enters the titanium tube heat exchanger 25. After absorbing the heat from the outdoor solution after absorbing moisture in the titanium tube heat exchanger 25, the refrigerant liquid evaporates to form a refrigerant gas, and then again Returning to the compressor 22, a complete refrigeration cycle is formed.

In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top" ", "inside", "front", "center", "both ends", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention and simplifying the description, and It is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise expressly specified and limited, terms such as "installation", "arrangement", "connection", "fixation", "swivel connection" and other terms should be understood in a broad sense, for example, it may be a fixed connection, or It can be a detachable connection or an integrated body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction between the two elements. Unless otherwise clearly defined, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides an air source heat pump fresh air unit based on solution moisture absorption which characterized in that: the air-air heat exchange device comprises a shell (1), wherein a partition plate is arranged on the inner side of the shell (1), the inner side of the shell (1) is divided into a region A, a region B, a region C and a region D through the partition plate, air openings are formed in one sides, close to the shell, of the region A, the region B, the region C and the region D, air-air heat exchange cores (24) are arranged at adjacent centers of the region A, the region B, the region C and the region D, the region A is communicated with the region C through the air-air heat exchange cores (24) to form an air return channel, and the region B is communicated with the region D through the air-air heat exchange cores (24) to form a fresh air channel;

a titanium tube heat exchanger is arranged at the inner side of the area A;

a solution dehumidification section is arranged at the inner side of the area B;

the inner side of the area C is provided with a solution regeneration section, a refrigeration compressor and other parts;

and an air return humidifying section is arranged on the inner side of the area D.

2. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 1, wherein: refrigerating plant includes titanium tube heat exchanger (25), titanium tube heat exchanger (25) inboard is provided with circulation pipe (21), circulation pipe (21) run through titanium tube heat exchanger (25) and are connected with compressor (22) and second condenser (18), compressor (22) one side is connected with first condenser (28), expansion valve (26) and drying filter (27) have been set up on circulation pipe (21).

3. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 1, wherein: the solution dehumidification section includes solution dehumidification core (4), the top of solution dehumidification core (4) is provided with solution dehumidification and sprays row (3), the below of solution dehumidification core (4) is provided with dehumidification solution pond (9), is located regional B wind gap department is provided with fresh air forced draught blower (6), fresh air forced draught blower (6) are just to solution dehumidification core (4).

4. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 1, wherein: the solution dehumidification section is communicated with the solution regeneration section through an overflow pipeline (20).

5. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 1, wherein: and a bypass air valve (38) penetrating through the shell (1) is arranged at the top of the solution dehumidification section.

6. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 1, wherein: the solution regeneration section comprises a regeneration core body (34), a regeneration spray row (35) is arranged above the regeneration core body (34), a solution regeneration tank (31) is arranged below the regeneration core body (34), and the solution regeneration tank (31) is communicated with the regeneration spray row (35) through a solution regeneration pump (29).

7. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 6, wherein: a sewage discharge pipeline is arranged at the bottom of the regeneration solution tank (31), and a sewage discharge electromagnetic valve (30) is arranged on the sewage discharge pipeline.

8. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 1, wherein: the return air humidifying section comprises a humidifying core body (11), a humidifying spray row (10) is arranged above the humidifying core body (11), a humidifying water tank (16) is arranged below the humidifying core body (11), and a humidifying pump (14) communicated with the humidifying spray row (10) is arranged in the humidifying water tank.

9. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 8, wherein: a water replenishing pipeline of the humidifying pool (16) and a water replenishing electromagnetic valve (15).

10. The solution moisture absorption based air source heat pump fresh air handling unit as claimed in claim 1, wherein: and an indirect evaporation spray row (5) connected with a water source is arranged above one surface of the air-air heat exchange core body (24) close to the solution dehumidification section.

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