CN100458292C - Refrigerating unit of air condition by dehumidifying, evaporative cooling solution - Google Patents

Abstract

The invention discloses a solution dehumidification evaporative cooling air-conditioning refrigeration device, which comprises a compressor (1), an evaporator (3), a throttling mechanism (4), a solution cooler (11), a regenerator (13), a concentrated solution Pump (14), dehumidifier (17), dilute solution pump (18) and heater (21), the improvement of the present invention is to arrange direct contact heat exchanger (24) and evaporative heat exchanger (27 ). The cooling water consumption of the invention is small, and the refrigerant is used to cool the air, the solution and the refrigerant itself. The device has a compact structure and is convenient for miniaturization.

Description

Solution dehumidification evaporative cooling air conditioning refrigeration device

technical field

The invention relates to a solution dehumidification evaporative cooling air-conditioning refrigeration device, which belongs to the technical field of refrigeration.

Background technique

At present, the working principle of a conventional solution dehumidification air-conditioning and refrigeration device is shown in Fig. 1 . It consists of the following parts:

1. Air handling system

It is made up of dehumidifier 17, evaporator 3. The dehumidifier 17 and the evaporator 3 are connected through an air duct 53 to form an air passage in which the air is dehumidified and cooled.

During work, the processed air first enters the dehumidifier 17 to be dehumidified. After reaching the required humidity, it enters the evaporator 3 to be cooled. After reaching the required temperature, it is sent into the air-conditioned room.

2. Solution dehumidification and regeneration system

It consists of a solution cooler 11, a regenerator 13, a concentrated solution pump 14, a solution heat exchanger 15, a dehumidifier 17, a dilute solution pump 18, and a heater 21; it can also be: the solution cooler 11 is placed in the dehumidifier 17 Internally, a heater 21 is arranged inside the regenerator 13 .

In the solution dehumidification and regeneration system, the regenerator 13 is connected to the concentrated solution pump 14, and the concentrated solution pump 14 is connected to the solution heat exchanger 15, and the solution heat exchanger 15 is connected to the solution cooler 11 through a pipeline 16, and the solution cooler 11 is connected to the solution cooler 11. Dehumidifier 17 is connected, dehumidifier 17 is connected with dilute solution pump 18, dilute solution pump 18 is connected with solution heat exchanger 15 through pipeline 19, solution heat exchanger 15 is connected with heater 21 through pipeline 20, heater 21 is connected with regenerator 13 connected to form a solution circulation loop to achieve dehumidification of the air.

In the dehumidifier 17, the concentrated solution is in direct contact with the air, undergoes heat and moisture exchange, absorbs moisture in the air, and becomes a dilute solution. After the dilute solution exits the dehumidifier 17, it is pressurized by the dilute solution pump 18, and is sent to the solution heat exchanger 15 through the pipeline 19, where it conducts indirect heat exchange with the high-temperature concentrated solution, absorbs its heat, and enters the solution through the pipeline 20. The heater 21 is further heated, and when the temperature reaches the requirement, it enters the regenerator 13 to be regenerated, and after releasing moisture, it becomes a concentrated solution. After the concentrated solution is pressurized by the concentrated solution pump 14, it enters the solution heat exchanger 15 for indirect heat exchange with the dilute solution to release heat. The heat, after the temperature is further lowered, enters the dehumidifier 17. So far, the solution has completed one cycle.

In the system, the function of the solution heat exchanger 15 is to improve the efficiency of the solution dehumidification and regeneration system. Because in the solution heat exchanger 15, indirect heat exchange is performed between the high-temperature concentrated solution and the dilute solution, so that the temperature of the concentrated solution is reduced , and the temperature of the dilute solution increases, therefore, on the one hand, the heating load of the dilute solution in the heater 21 is reduced, and on the other hand, the cooling load of the concentrated solution in the solution cooler 11 is also reduced, so the dehumidification and dehumidification of the solution are improved. efficiency of the regenerative system.

3. Refrigeration system

It consists of a compressor 1, a water-cooled condenser 5, a throttling mechanism 4, and an evaporator 3.

In the refrigeration system, the compressor 1 is connected to the water-cooled condenser 5 through the pipeline 6, the water-cooled condenser 5 is connected to the throttling mechanism 4, the throttling mechanism 4 is connected to the evaporator 3, and the evaporator 3 is connected to the compressor 1 through the pipeline 2 , to form a refrigeration cycle to cool the air.

After the low-temperature and low-pressure refrigerant vapor is compressed by the compressor 1, it becomes the superheated vapor of the high-temperature and high-pressure refrigerant, and enters the water-cooled condenser 5 through the pipeline 6, and conducts indirect heat exchange with the cooling water. After releasing heat, it is condensed into a high-pressure liquid, liquid After throttling by the throttling mechanism 4, it becomes a low-temperature and low-pressure gas-liquid two-phase mixture, enters the evaporator 3, exchanges heat with the dehumidified air from the dehumidifier 17, cools it to the required temperature, and then sends it to the air-conditioned room , and after the refrigerant absorbs the heat of the air, it becomes a low-temperature and low-pressure refrigerant vapor, and enters the compressor 1 through the pipeline 2 to be compressed. So far, the refrigerant completes a refrigeration cycle.

4. Solution cooling system

It consists of a cooling tower 22, a cooling water circulation pump 7, and a solution cooler 11.

In the solution cooling system, the cooling tower 22 is connected to the cooling water circulation pump 7, the cooling water circulation pump 7 is connected to the solution cooler 11 through the pipeline 12, and the solution cooler 11 is connected to the cooling tower 22 through the pipeline 10, forming a cooling water circulation loop.

The cooling water from the cooling tower 22 is pressurized by the cooling water circulation pump 7, and part of the cooling water enters the solution cooler 11 through the pipeline 12, and performs indirect heat exchange with the concentrated solution that is about to enter the dehumidifier 17 to cool it down. Cool down, and after the cooling water temperature rises, it returns to the cooling tower 22 through the pipeline 10 . So far, the cooling water has completed a cooling cycle for the solution.

5. Refrigerant cooling system

It consists of a cooling tower 22, a cooling water circulation pump 7, and a water-cooled condenser 5.

In the refrigerant cooling system, the cooling tower 22 is connected to the cooling water circulation pump 7, the cooling water circulation pump 7 is connected to the water-cooled condenser 5 through the pipeline 8, and the water-cooled condenser 5 is connected to the cooling tower 22 through the pipeline 9 to form a cooling water circulation loop .

The cooling water from the cooling tower 22 is pressurized by the cooling water circulation pump 7, and part of the cooling water enters the water-cooled condenser 5 through the pipeline 8, and performs indirect heat exchange with the high-temperature and high-pressure refrigerant superheated steam discharged from the compressor 1. Absorb its heat, condense it into liquid, and after cooling water temperature rises, return to cooling tower 22 through pipeline 9. So far, the cooling water has completed a cooling cycle for the refrigerant.

It can be seen that in the water-cooled condenser 5 and the solution cooler 11 of the conventional solution dehumidification air-conditioning refrigeration device, the cooling water uses the indirect heat exchange method to cool the refrigerant and the solution. Since the cooling water relies on sensible heat for heat exchange, Therefore, the consumption of cooling water is very large. In addition, since there is a heat transfer temperature difference between the cooling water and the refrigerant in the water-cooled condenser 5, this cooling method for the refrigerant is compared with the evaporative cooling method. The condensation temperature of the refrigeration system is high. In view of the above reasons, the performance of the conventional solution dehumidification air-conditioning refrigeration device is not high, and the water consumption is large, and the equipment is also very large, which is not convenient for miniaturization.

Contents of the invention

The technical problem to be solved by the present invention is to provide a solution dehumidification evaporative cooling air-conditioning and refrigeration device, which consumes less cooling water and uses refrigerant to cool air, solution and the refrigerant itself. The device has a compact structure and is convenient for miniaturization.

For solving the problems of the technologies described above, the present invention has the following three technical solutions for solving the problems of the technologies:

The first scheme is: it includes compressor (1), evaporator (3), throttling mechanism (4), solution cooler (11), regenerator (13), concentrated solution pump (14), dehumidifier ( 17), dilute solution pump (18) and heater (21), are characterized in that: it also comprises direct contact heat exchanger (24) and evaporative heat exchanger (27); Described evaporative heat exchanger ( 27) A group of cooling coils (43) are provided, and the direct contact heat exchanger (24) is respectively connected to the outlet end of the compressor (1) through the A pipeline (23), and cooled with the solution through the F pipeline (32) connected to the outlet of the device (11), connected to the outlet of the cooling coil (43) of the evaporative heat exchanger (27) through C pipeline (29), B pipeline (28), and connected to each other through the working fluid pump (26 ) is connected to the inlet end of the cooling coil (43) of the evaporative heat exchanger (27); the outlet end of the cooling coil (43) of the evaporative heat exchanger (27) passes through the B pipeline (28), D The pipeline (30) is connected to the inlet end of the solution cooler (11), and is connected to the inlet end of the throttling mechanism (4) through the B pipeline (28) and the E pipeline (31).

The second scheme is: it includes compressor (1), evaporator (3), throttling mechanism (4), solution cooler (11), regenerator (13), concentrated solution pump (14), dehumidifier ( 17), dilute solution pump (18) and heater (21), it also comprises direct contact heat exchanger (24) and evaporative heat exchanger (27); Described evaporative heat exchanger (27) is provided with a A group of cooling coils (43) and a group of condensing coils (44), the direct contact heat exchanger (24) passes through the condensing coils (44) of the H pipeline (42) and the evaporative heat exchanger (27) respectively ) outlet end is connected, is connected with the outlet end of solution cooler (11) by F pipeline (32), is connected with the cooling coil of described evaporative heat exchanger (27) by C pipeline (29), B pipeline (28) The outlet end of (43) links to each other, links to each other with the cooling coil (43) inlet end of described evaporative heat exchanger (27) by working medium pump (26); The inlet end of the pipe (44) is connected to the outlet end of the compressor (1) through the G pipeline (41), and the outlet end of the cooling coil (43) of the evaporative heat exchanger (27) is connected through the B pipeline (28), The D pipe (30) is connected to the inlet end of the solution cooler (11), and is connected to the inlet end of the throttling mechanism (4) through the B pipe (28) and the E pipe (31).

The third scheme is: it comprises compressor (1), evaporator (3), throttling mechanism (4), solution cooler (11), regenerator (13), concentrated solution pump (14), dehumidifier ( 17), dilute solution pump (18) and heater (21), are characterized in that: it also comprises direct contact heat exchanger (24) and evaporative heat exchanger (27); Described evaporative heat exchanger ( 27) A group of cooling coils (43) and a group of condensing coils (44) are provided, and the direct contact heat exchanger (24) is connected to the outlet end of the solution cooler (11) through F pipes (32) respectively , is connected to the outlet end of the cooling coil (43) of the evaporative heat exchanger (27) through the C pipeline (29), B pipeline (28), and is exchanged with the evaporative heat exchanger (26) by the working fluid pump (26). The inlet end of the cooling coil (43) of the device (27) is connected; the inlet end of the condensation coil (44) of the evaporative heat exchanger (27) is connected with the outlet end of the compressor (1) through the G pipe (41) The outlet end of the cooling coil (43) of the evaporative heat exchanger (27) is connected to the inlet end of the solution cooler (11) through the B pipe (28) and the D pipe (30). The outlet end of the condensing coil (44) of the exchanger (27) is connected to the inlet end of the throttling mechanism (4) through an I pipeline (45).

In order to better distribute the refrigerant flow, a control valve (25) is arranged on the C pipe (29).

The beneficial effects of the present invention are:

1. The refrigerant is used to cool the air, solution and refrigerant itself at the same time, reducing the intermediate heat exchange link of cooling water, making the structure compact and the device more convenient for miniaturization.

2. In the evaporative heat exchanger, the heat released by the refrigerant is taken away by the evaporation of the circulating cooling water, so that the refrigerant is cooled and condensed, so the amount of cooling water is much less than that of the water-cooled condenser. Reduced cooling water consumption.

3. Compared with the water-cooled condenser, under the same working conditions, the condensing temperature of the refrigeration cycle is lower when the evaporative heat exchanger is used, thus reducing the power consumption of the compressor.

4. In the solution cooler, the refrigerant liquid uses the latent heat of vaporization to cool the solution, so compared with cooling with cooling water, the flow rate of the refrigerant liquid required is smaller, and the heat transfer temperature difference is also increased, so the Dimensions of piping and solution coolers.

5. The invention is suitable for air-conditioning and refrigeration systems of industrial and civil buildings, especially for small and medium-sized air-conditioning and refrigeration systems that require humidity.

Description of drawings

Fig. 1 is a schematic structural diagram of a conventional solution dehumidification air-conditioning refrigeration device;

Fig. 2 is a structural schematic diagram of the first scheme of the present invention;

Fig. 3 is the structural representation of the second scheme of the present invention;

Fig. 4 is a structural schematic diagram of the third solution of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the present invention is described in further detail:

One, the first embodiment of the present invention:

As shown in Figure 2, the whole device consists of the following parts: 1. Air treatment system; 2. Solution dehumidification and regeneration system; 3. Refrigeration system; 4. Solution cooling system; 5. Refrigerant cooling system. The main equipment of each part is as follows:

1. Air handling system

The composition and process of this part are exactly the same as the conventional system.

2. Solution dehumidification and regeneration system

The composition and process of this part are the same as the conventional system. During the circulation process, the only difference is: in the solution cooler 11, the refrigerant replaces the cooling water as the cooling medium of the concentrated solution.

3. Refrigeration system

It consists of a direct contact heat exchanger 24 , a working medium pump 26 , an evaporative heat exchanger 27 , a throttling mechanism 4 , an evaporator 3 and a compressor 1 .

In this scheme, there is only one set of cooling coils 43 in the evaporative heat exchanger 27, and the refrigerant liquid performs sensible heat exchange in it.

In the refrigeration system, the direct contact heat exchanger 24 is connected to the working medium pump 26, and the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 passes through B The pipeline 28 and the E pipeline 31 are connected to the throttle mechanism 4, the throttle mechanism 4 is connected to the evaporator 3, the evaporator 3 is connected to the compressor 1 through the J pipeline 2, and the compressor 1 is connected to the direct contact heat exchanger through the A pipeline 23 24 are connected to form a refrigeration cycle to cool the air.

The refrigerant liquid coming out of the direct contact heat exchanger 24 is pressurized by the working medium pump 26, and then enters the cooling coil 43 of the evaporative heat exchanger 27, and performs indirect heat exchange with air and circulating cooling water to release heat After being supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, part of it enters the throttling mechanism 4 through the B pipe 28 and the E pipe 31 and is throttled to become a low-temperature and low-pressure gas-liquid two-phase mixture. , enters the evaporator 3, exchanges heat with the dehumidified air coming out of the dehumidifier 17, and cools it to the required temperature. After the refrigerant absorbs its heat, it becomes a low-temperature and low-pressure refrigerant vapor. The machine 1 is compressed into superheated steam of high-temperature and high-pressure refrigerant, and returns to the direct contact heat exchanger 24 through the A pipeline 23 . So far, the refrigerant completes a refrigeration cycle.

4. Solution cooling system

It consists of a direct contact heat exchanger 24 , a working medium pump 26 , an evaporative heat exchanger 27 and a solution cooler 11 .

In the solution cooling system, the direct contact heat exchanger 24 is connected to the working medium pump 26, and the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 passes through Pipe B 28 and pipe D 30 are connected to the solution cooler 11, and the solution cooler 11 is connected to the direct contact heat exchanger 24 through the F pipe 32 to form a refrigerant circulation loop to cool the solution.

The refrigerant liquid coming out of the direct contact heat exchanger 24 is pressurized by the working medium pump 26, and then enters the cooling coil 43 of the evaporative heat exchanger 27, and performs indirect heat exchange with air and circulating cooling water to release heat After being supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, part of it enters the solution cooler 11 through the B pipeline 28 and the D pipeline 30, and exchanges heat with the concentrated solution that is about to enter the dehumidifier 17. Make it cool, after the refrigerant liquid absorbs its heat, it becomes a gas-liquid two-phase mixture, and returns to the direct contact heat exchanger 24 through the F pipeline 32 . So far, the refrigerant completes a cooling cycle for the solution.

5. Refrigerant cooling system

It consists of a direct contact heat exchanger 24 , a working fluid pump 26 , an evaporative heat exchanger 27 and a control valve 25 .

In the refrigerant cooling system, the direct contact heat exchanger 24 is connected to the working medium pump 26, the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 The B pipe 28 and the C pipe 29 are connected to the control valve 25, and the control valve 25 is connected to the direct contact heat exchanger 24 to form a refrigerant circulation loop to realize the cooling of the refrigerant itself.

The refrigerant liquid coming out of the direct contact heat exchanger 24 is pressurized by the working medium pump 26, and then enters the cooling coil 43 of the evaporative heat exchanger 27, and performs indirect heat exchange with air and circulating cooling water to release heat After being supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, part of it passes through the B pipeline 28, the C pipeline 29, and the control valve 25, and then returns to the direct contact heat exchanger 24 to communicate with the refrigeration system. The refrigerant that returns to the direct contact heat exchanger 24 from the solution cooling system performs direct contact heat exchange, making them condense into a saturated liquid, and itself becomes a saturated liquid due to heat absorption. So far, the refrigerant completes a cooling cycle for itself.

In this system, the function of the control valve 25 is to better distribute the refrigerant liquid flow, prevent the refrigerant liquid from being short-circuited, and most of it flows into the direct contact heat exchanger 24, so that the solution cooler 11 cannot obtain the required flow.

In the refrigeration system, solution cooling system, and refrigerant cooling system, their common parts are direct contact heat exchanger 24, working medium pump 26 and evaporative heat exchanger 27, and they are connected by these three equipments. As a whole, the refrigerant realizes the cooling of air, solution and refrigerant itself.

Two, the second embodiment of the present invention:

As shown in Figure 3, the whole device consists of the following parts: 1. Air treatment system; 2. Solution dehumidification and regeneration system; 3. Refrigeration system; 4. Solution cooling system; 5. Refrigerant cooling system. The main equipment of each part is as follows:

1. Air handling system

The composition and process of this part are exactly the same as the conventional system.

2. Solution dehumidification and regeneration system

The composition and process of this part are the same as the conventional system. During the circulation process, the only difference is: in the solution cooler 11, the refrigerant replaces the cooling water as the cooling medium of the concentrated solution.

3. Refrigeration system

It consists of a direct contact heat exchanger 24 , a working medium pump 26 , an evaporative heat exchanger 27 , a throttling mechanism 4 , an evaporator 3 and a compressor 1 .

The difference between the evaporative heat exchanger 27 and the evaporative heat exchanger 27 in the first scheme is that there are two sets of coils in the evaporative heat exchanger 27, a set of cooling coils 43, and a set of condensing coils 44. In the cooling coil 43, the refrigerant liquid performs sensible heat exchange, which is the same as the first scheme. In the condensation coil 44, the superheated vapor of the high-temperature and high-pressure refrigerant is condensed to release heat, and the superheated vapor of the high-temperature and high-pressure refrigerant is released Condensed into refrigerant liquid.

In the refrigeration system, the direct contact heat exchanger 24 is connected to the working medium pump 26, and the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 passes through B The pipeline 28 and the E pipeline 31 are connected to the throttle mechanism 4, the throttle mechanism 4 is connected to the evaporator 3, the evaporator 3 is connected to the compressor 1 through the J pipeline 2, and the compressor 1 is connected to the evaporative heat exchanger 27 through the G pipeline 41 The condensing coil 44 of the evaporative heat exchanger 27 is connected to the direct contact heat exchanger 24 through the H pipe 42 to form a refrigeration cycle to cool the air.

The refrigerant liquid coming out of the direct contact heat exchanger 24 is pressurized by the working medium pump 26, and then enters the cooling coil 43 of the evaporative heat exchanger 27, and performs indirect heat exchange with air and circulating cooling water to release heat After being supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, part of it enters the throttling mechanism 4 through the B pipe 28 and the E pipe 31 and is throttled to become a low-temperature and low-pressure gas-liquid two-phase mixture. , enters the evaporator 3, exchanges heat with the dehumidified air coming out of the dehumidifier 17, and cools it to the required temperature. After the refrigerant absorbs its heat, it becomes a low-temperature and low-pressure refrigerant vapor. Machine 1 is compressed into superheated steam of high-temperature and high-pressure refrigerant, which enters the condensing coil 44 of the evaporative heat exchanger 27 through the G pipe 41, and performs indirect heat exchange with air and circulating cooling water. After releasing heat, it is condensed into The liquid returns to the direct contact heat exchanger 24 through the H pipeline 42 . So far, the refrigerant completes a refrigeration cycle.

4. Solution cooling system

It consists of a direct contact heat exchanger 24 , a working medium pump 26 , an evaporative heat exchanger 27 and a solution cooler 11 .

In the solution cooling system, the direct contact heat exchanger 24 is connected to the working medium pump 26, and the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 passes through Pipe B 28 and pipe D 30 are connected to the solution cooler 11, and the solution cooler 11 is connected to the direct contact heat exchanger 24 through the F pipe 32 to form a refrigerant circulation loop to cool the solution.

The refrigerant liquid coming out of the direct contact heat exchanger 24 is pressurized by the working medium pump 26, and then enters the cooling coil 43 of the evaporative heat exchanger 27, and performs indirect heat exchange with air and circulating cooling water to release heat After being supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, part of it enters the solution cooler 11 through the B pipeline 28 and the D pipeline 30, and exchanges heat with the concentrated solution that is about to enter the dehumidifier 17. Make it cool, after the refrigerant liquid absorbs its heat, it becomes a gas-liquid two-phase mixture, and returns to the direct contact heat exchanger 24 through the F pipeline 32 . So far, the refrigerant completes a cooling cycle for the solution.

5. Refrigerant cooling system

It consists of a direct contact heat exchanger 24 , a working fluid pump 26 , an evaporative heat exchanger 27 and a control valve 25 .

In the refrigerant cooling system, the direct contact heat exchanger 24 is connected to the working medium pump 26, the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 The B pipe 28 and the C pipe 29 are connected to the control valve 25, and the control valve 25 is connected to the direct contact heat exchanger 24 to form a refrigerant circulation loop to realize the cooling of the refrigerant itself.

The refrigerant liquid coming out of the direct contact heat exchanger 24 is pressurized by the working medium pump 26, and then enters the cooling coil 43 of the evaporative heat exchanger 27, and performs indirect heat exchange with air and circulating cooling water to release heat After being supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, part of it passes through the B pipeline 28, the C pipeline 29, and the control valve 25, and then returns to the direct contact heat exchanger 24 to communicate with the refrigeration system. Perform direct contact heat exchange with the refrigerant that returns to the direct contact heat exchanger 24 from the solution cooling system, and both become saturated liquid. So far, the refrigerant completes a cooling cycle for itself.

Same as the first solution, the role of the control valve 25 in the system is to better distribute the refrigerant liquid flow, prevent the refrigerant liquid from short-circuiting, and most of it flows into the direct contact heat exchanger 24, so that the solution cooler 11 has to to the required flow.

In the refrigeration system, solution cooling system, and refrigerant cooling system, their common parts are direct contact heat exchanger 24, working medium pump 26 and evaporative heat exchanger 27, and they are connected by these three equipments. As a whole, the refrigerant realizes the cooling of air, solution and refrigerant itself.

Three, the third embodiment of the present invention

As shown in Figure 4, it consists of the following parts: 1. Air handling system; 2. Solution dehumidification and regeneration system; 3. Refrigeration system; 4. Solution cooling system; 5. Refrigerant cooling system. The main parts of each part The equipment is as follows:

1. Air handling system

The composition and process of this part are exactly the same as the conventional system.

2. Solution dehumidification and regeneration system

The composition and process of this part are the same as the conventional system. During the circulation process, the only difference is: in the solution cooler 11, the refrigerant replaces the cooling water as the cooling medium of the concentrated solution.

3. Refrigeration system

It consists of a compressor 1, an evaporative heat exchanger 27, a throttling mechanism 4, and an evaporator 3.

Same as the second scheme, the difference between the evaporative heat exchanger 27 and the evaporative heat exchanger 27 in the first scheme is: there are two sets of coils in the evaporative heat exchanger 27, one set of cooling coils 43, one set Condensation coil 44. In the cooling coil 43, the refrigerant liquid performs sensible heat exchange. In the condensation coil 44, the superheated vapor of the high-temperature and high-pressure refrigerant is condensed to release heat, and the superheated vapor of the high-temperature and high-pressure refrigerant is condensed into refrigerant liquid.

In the refrigeration system, the compressor 1 is connected to the condensing coil 44 of the evaporative heat exchanger 27 through the G pipe 41, and the condensing coil 44 of the evaporative heat exchanger 27 is connected to the throttling mechanism 4 through the I pipe 45, throttling The mechanism 4 is connected with the evaporator 3, and the evaporator 3 is connected with the compressor 1 through the J pipe 2 to form a refrigeration cycle loop to realize the cooling of the air.

After the low-temperature and low-pressure refrigerant vapor is compressed by the compressor 1, it becomes the superheated vapor of the high-temperature and high-pressure refrigerant, and enters the condensing coil 44 of the evaporative heat exchanger 27 through the G pipe 41, and cools with air and circulation in the condensing coil 44 The water undergoes indirect heat exchange and is condensed into a liquid after releasing heat. After the refrigerant liquid comes out of the condensing coil 44 of the evaporative heat exchanger 27, it enters the throttling mechanism 4 through the I pipe 45 and is throttled, becomes a low-temperature and low-pressure gas-liquid two-phase mixture, enters the evaporator 3, and dehumidifier 17 The dehumidified air that comes out is subjected to heat exchange to cool it down to the required temperature. After the refrigerant absorbs the heat, it becomes a low-temperature and low-pressure refrigerant vapor, which enters the compressor 1 through the J pipe 2 and is compressed. So far, the refrigerant completes a refrigeration cycle.

4. Solution cooling system

It consists of a direct contact heat exchanger 24 , a working medium pump 26 , an evaporative heat exchanger 27 and a solution cooler 11 .

In the solution cooling system, the direct contact heat exchanger 24 is connected to the working medium pump 26, and the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 passes through Pipe B 28 and pipe D 30 are connected to the solution cooler 11, and the solution cooler 11 is connected to the direct contact heat exchanger 24 through the F pipe 32 to form a refrigerant circulation loop to cool the solution.

The refrigerated liquid coming out of the direct contact heat exchanger 24 enters the cooling coil 43 of the evaporative heat exchanger 27 after being pressurized by the working medium pump 26, and in the cooling coil 43, it is indirect with air and circulating cooling water. Heat exchange, after releasing heat, it is supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, part of it enters the solution cooler 11 through the B pipe 28 and the D pipe 30, and exchanges heat with the concentrated solution that is about to enter the dehumidifier 17 , to make it cool, the refrigerant liquid absorbs its heat, and becomes a gas-liquid two-phase mixture, and returns to the direct contact heat exchanger 24 through the F pipeline 32 . So far, the refrigerant completes a cooling cycle for the solution.

5. Refrigerant cooling system

It consists of a direct contact heat exchanger 24 , a working fluid pump 26 , an evaporative heat exchanger 27 and a control valve 25 .

In the refrigerant cooling system, the direct contact heat exchanger 24 is connected to the working medium pump 26, the working medium pump 26 is connected to the cooling coil 43 of the evaporative heat exchanger 27, and the cooling coil 43 of the evaporative heat exchanger 27 The B pipe 28 and the C pipe 29 are connected to the control valve 25, and the control valve 25 is connected to the direct contact heat exchanger 24 to form a refrigerant circulation loop to realize the cooling of the refrigerant itself.

The refrigerated liquid coming out of the direct contact heat exchanger 24 enters the cooling coil 43 of the evaporative heat exchanger 27 after being pressurized by the working medium pump 26, and in the cooling coil 43, it is indirect with air and circulating cooling water. Heat exchange, after releasing heat, it is supercooled. After the supercooled refrigerant liquid comes out of the cooling coil 43 of the evaporative heat exchanger 27, a part of it passes through the B pipeline 28, the C pipeline 29, the control valve 25, and returns to the direct contact heat exchanger 24 to be cooled with the solution. The refrigerant returned from the system to the direct contact heat exchanger 24 is subjected to direct contact heat exchange, making it condensed into a saturated liquid, which itself also becomes a saturated liquid due to heat absorption. So far, the refrigerant completes a cooling cycle for itself.

Same as the first and second schemes, the function of the control valve 25 is also to better distribute the refrigerant liquid flow, prevent the refrigerant liquid from short-circuiting, and most of it flows into the direct contact heat exchanger 24, so that the solution cooler 11 has to to the required flow.

In this scheme, the common part of the refrigeration system, the solution cooling system and the refrigerant cooling system is the evaporative heat exchanger 27 . The common parts of the solution cooling system and the refrigerant cooling system are a direct contact heat exchanger 24 , a working medium pump 26 and an evaporative heat exchanger 27 .

In this scheme, the refrigerants of the refrigeration system and the solution cooling system and the refrigerant cooling system are in two independent systems without contact with each other. The refrigerants of the solution cooling system and the refrigerant cooling system may not be lubricated during operation Oil.

Claims (4)

1, a kind of refrigerating unit of air condition by dehumidifying, evaporative cooling solution, it comprises compressor (1), evaporimeter (3), throttle mechanism (4), solution cooler (11), regenerator (13), concentrated solution pump (14), dehumidifier (17), weak solution pump (18) and heater (21), it is characterized in that: further comprising direct heat exchanger (24) and evaporative heat exchanger (27); Described evaporative heat exchanger (27) is provided with one group of cooling coil (43), described direct heat exchanger (24) links to each other with the port of export of compressor (1) by A pipeline (23) respectively, link to each other by the port of export of F pipeline (32) with solution cooler (11), link to each other with the port of export of the cooling coil (43) of described evaporative heat exchanger (27) by C pipeline (29), B pipeline (28), link to each other with cooling coil (43) arrival end of described evaporative heat exchanger (27) by working medium pump (26); Cooling coil (43) port of export of described evaporative heat exchanger (27) links to each other with the arrival end of solution cooler (11) by B pipeline (28), D pipeline (30), links to each other with the arrival end of throttle mechanism (4) by B pipeline (28), E pipeline (31).

2, a kind of refrigerating unit of air condition by dehumidifying, evaporative cooling solution, it comprises compressor (1), evaporimeter (3), throttle mechanism (4), solution cooler (11), regenerator (13), concentrated solution pump (14), dehumidifier (17), weak solution pump (18) and heater (21), it is characterized in that: further comprising direct heat exchanger (24) and evaporative heat exchanger (27); Described evaporative heat exchanger (27) is provided with one group of cooling coil (43) and one group of condenser coil (44), described direct heat exchanger (24) links to each other with condenser coil (44) port of export of evaporative heat exchanger (27) by H pipeline (42) respectively, link to each other by the port of export of F pipeline (32) with solution cooler (11), link to each other with the port of export of the cooling coil (43) of described evaporative heat exchanger (27) by C pipeline (29), B pipeline (28), link to each other with cooling coil (43) arrival end of described evaporative heat exchanger (27) by working medium pump (26); The arrival end of the condenser coil (44) of described evaporative heat exchanger (27) links to each other with the port of export of compressor (1) by G pipeline (41), cooling coil (43) port of export of described evaporative heat exchanger (27) links to each other with the arrival end of solution cooler (11) by B pipeline (28), D pipeline (30), links to each other with the arrival end of throttle mechanism (4) by B pipeline (28), E pipeline (31).

3, a kind of refrigerating unit of air condition by dehumidifying, evaporative cooling solution, it comprises compressor (1), evaporimeter (3), throttle mechanism (4), solution cooler (11), regenerator (13), concentrated solution pump (14), dehumidifier (17), weak solution pump (18) and heater (21), it is characterized in that: further comprising direct heat exchanger (24) and evaporative heat exchanger (27); Described evaporative heat exchanger (27) is provided with one group of cooling coil (43) and one group of condenser coil (44), described direct heat exchanger (24) links to each other with the port of export of solution cooler (11) by F pipeline (32) respectively, link to each other with the port of export of the cooling coil (43) of described evaporative heat exchanger (27) by C pipeline (29), B pipeline (28), link to each other with cooling coil (43) arrival end of described evaporative heat exchanger (27) by working medium pump (26); The arrival end of the condenser coil (44) of described evaporative heat exchanger (27) links to each other with the port of export of compressor (1) by G pipeline (41), cooling coil (43) port of export of described evaporative heat exchanger (27) links to each other with the arrival end of solution cooler (11) by B pipeline (28), D pipeline (30), and the port of export of the condenser coil (44) of described evaporative heat exchanger (27) links to each other with the arrival end of throttle mechanism (4) by I pipeline (45).

4, according to the described refrigerating unit of air condition by dehumidifying, evaporative cooling solution of claim 1 to 3, it is characterized in that: control valve (25) is set on the described C pipeline (29).

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