CN113899110B - An Absorption Combined Cooling and Heating System with Intermediate Process - Google Patents

Abstract

The invention is applicable to the fields of refrigeration and heat pumps, and discloses an absorption combined cooling and heating system with an intermediate process. The absorption combined cooling and heating system with an intermediate process includes a boiler unit, an absorption unit and a combined cooling and heating unit. The boiler unit generates heat energy through the combustion of fossil fuels or biomass, and transmits it to the absorption unit as the driving energy through the heat source medium, and performs cascade recovery of flue gas waste heat in the middle evaporator; the absorption unit produces waste heat cascade recovery effect in the middle evaporator, The cooling effect is generated in the evaporator, and the heating effect is generated in the condenser, rectifier and absorber, and is transmitted to the combined cooling and heating unit through the cooling medium and the heat transfer medium; the combined cooling and heating unit realizes summer load in the outdoor unit. The heat release of the heat medium and the heat absorption of the cold medium in winter, the indoor cooling machine realizes the cooling of the cold medium in summer, and the indoor heat supply machine realizes the heat supply of the heat medium in winter.

Description

An Absorption Combined Cooling and Heating System with Intermediate Process

technical field

The invention relates to the field of refrigeration and heat pumps, in particular to an absorption combined cooling and heating system with an intermediate process.

Background technique

With the development of society, energy and environmental issues have become increasingly prominent and have become the focus of attention of countries all over the world. Conventional energy reserves are no longer able to support the development of future society. Human beings need to accelerate the development of new energy, change the energy structure, and alleviate energy pressure. At the same time, China is in a period of accelerated urbanization, with huge energy consumption, and the task of energy conservation and emission reduction is very arduous. According to statistics, building energy consumption has accounted for 46.7% of the total energy consumption of the society, while heating energy consumption in the north accounts for 40% of the total energy consumption of buildings in the country.

Compared with cities, rural areas live more scattered, and cannot build large-scale and centralized heating pipelines like cities. They do not have the means to develop and adopt regional centralized heating, and cannot build and operate large-scale heating facilities. At present, most of them use decentralized Heating or household heating. Firewood, loose coal, honeycomb coal, gas stove and coal block stove are widely used, and high-temperature flue gas or hot water combined with earth kang, hanging kang, flue wall, "earth heating" and so on are used for heating in winter. This heating method has problems such as high energy consumption, low energy utilization efficiency, and serious environmental pollution. At the same time, there is still a wide range of air-conditioning and cooling needs in rural areas in summer, which are generally met by purchasing electric-driven compression air conditioners. However, the traditional compression system consumes a lot of power and is expensive to operate, so it is not suitable for large-scale promotion in rural areas. Therefore, it is imminent to develop clean and efficient combined cooling and heating technologies in rural areas.

An absorption system is a device that is driven by heat energy and produces a cooling/heating effect. Industrial waste heat can be used, as well as clean energy such as natural gas, coal gas, biomass, and solar energy. Therefore, in areas far away from power grids, heating networks, or areas with insufficient power and inconvenient construction of heating networks, the absorption system can provide users with cooling and heating energy, which meets the social needs of energy saving, emission reduction, "carbon neutrality", and sustainable development. However, the traditional absorption system has the following problems: 1. Different from the compression system, the absorption system relies on the evaporation of the working fluid to release cold energy, and relies on the condensation of the working fluid and the absorption of the solution to release heat energy. It is inconvenient to switch between cooling and heating modes, and it is difficult to achieve cooling and heating. Joint supply; 2. The absorption system is usually used in conjunction with the urban heating pipe network to perform heat exchange between the heat source and the primary pipe network or the primary pipe network and the secondary pipe network, and does not have the function of separate heat supply; 3. The traditional absorption system It is difficult for the system to utilize waste heat, resulting in high waste heat discharge temperature and low utilization rate of heat source.

Contents of the invention

The purpose of the present invention is to provide an absorption combined cooling and heating system with an intermediate process, which can utilize various energy sources including fossil fuels and biomass, and provide valve group switching to realize the summer supply of a single set of absorption units. Cold and winter heating.

In order to achieve the above object, the scheme provided by the present invention is:

An absorption combined cooling and heating system with an intermediate process, including a boiler unit, an absorption unit, and a combined cooling and heating unit; the absorption unit includes a generator, a rectifier, a condenser, and a working medium primary throttle valve , an intermediate evaporator, a separator, a working medium secondary throttle valve, an evaporator, a solution primary throttle valve, an intermediate absorber, a solution secondary throttle valve, an absorber and a solution pump; the cooling and heating unit includes Outdoor unit, indoor cooling machine, indoor heating machine, cold medium pump, heat medium pump and valve group;

The heat source medium outlet of the boiler unit is connected to the heat source medium inlet of the generator, the heat source medium outlet of the generator is connected to the heat source medium inlet of the boiler unit, and the boiler unit is also connected to the intermediate evaporator;

The steam outlet of the generator is connected with the steam inlet of the rectifier, the return port of the rectifier is connected with the return port of the generator, and the steam outlet of the rectifier is connected with the condenser in turn. , the working fluid primary throttle valve, the intermediate evaporator is connected to the separator, the gas outlet of the separator is connected to the intermediate absorber, and the liquid outlet of the separator is sequentially connected to the working fluid The secondary throttle valve, the evaporator and the absorber are connected, and the solution outlet of the generator is connected with the primary throttle valve, the intermediate absorber, the solution secondary throttle valve, the The absorber is connected to the solution pump, and the solution pump is connected to the generator through the intermediate absorber;

The valve group includes a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve, and the outdoor unit is connected to the condenser and the The absorber is connected to the heat transfer medium pump, the first outlet of the heat transfer medium pump is connected to the outdoor unit through the fifth valve, and the second outlet of the heat transfer medium pump is connected to the sixth valve It is connected with the indoor heat supply machine, and the indoor heat supply machine is connected with the absorber; the outdoor unit is sequentially connected with the evaporator and the cooling medium pump through the second valve, and the cooling medium pump The first outlet of the medium pump is connected to the outdoor unit through the fourth valve, the second outlet of the cooling medium pump is connected to the indoor cooler through the third valve, and the indoor cooler connected to the evaporator; the combined cooling and heating unit is used for cooling, the first valve, the third valve and the fifth valve are opened, and the second valve, the fourth valve and the The sixth valve is closed; the combined cooling and heating unit is used for heat supply, the second valve, the fourth valve and the sixth valve are opened, and the first valve, the third valve and the The fifth valve is closed.

Exemplarily, the boiler unit includes a boiler and a heat source medium pump, and heat energy generated by the boiler is delivered to the generator through the heat source medium pump.

Exemplarily, the outdoor unit, the first valve, the condenser, the absorber and the heat transfer medium pump are connected in sequence; or

The outdoor unit, the first valve, the absorber, the condenser and the heat transfer medium pump are connected in sequence.

Exemplarily, the rectifier is also used to heat the heat-carrying medium, and the outdoor unit is connected to the condenser, the rectifier and the absorber in any order through the first valve and then connected to the The heat transfer medium pump is connected.

Exemplarily, the outdoor unit, the first valve, the condenser, the rectifier, the absorber and the heat transfer medium pump are connected in sequence; or

The outdoor unit, the first valve, the absorber, the condenser, the rectifier and the heat transfer medium pump are connected in sequence.

Exemplarily, the absorption unit further includes a heat transfer medium preheater, and the outdoor unit is connected to the heat transfer medium preheater, the condenser, and the rectifier in any order through the first valve. The heat transfer medium pump is connected after the absorber and the heat transfer medium pump, and the boiler unit is connected with the intermediate evaporator and the heat transfer medium preheater in any order.

Exemplarily, the outdoor unit, the first valve, the heat transfer medium preheater, the condenser, the rectifier, the absorber and the heat transfer medium pump are connected in sequence, so The boiler unit connection, the intermediate evaporator and the heat transfer medium preheater are sequentially connected; or

The outdoor unit, the first valve, the heat transfer medium preheater, the condenser, the rectifier, the absorber and the heat transfer medium pump are connected in sequence, and the boiler unit is connected to , the intermediate evaporator and the heat transfer medium preheater are connected in sequence.

Exemplarily, the absorption unit further includes a solution preheater, the solution pump is connected to the intermediate absorber, the solution preheater and the generator in any order, and the boiler unit is connected to The solution preheater and the intermediate evaporator are connected in any order.

Exemplarily, the absorption unit further includes a heat transfer medium preheater, and the outdoor unit is connected to the heat transfer medium preheater, the condenser, and the absorber in any order through the first valve Afterwards, it is connected with the heat transfer medium pump, and the boiler unit is connected with the intermediate evaporator and the heat transfer medium preheater in any order.

Exemplarily, the rectifier is also used to heat the solution output by the solution pump, and the solution pump is connected to the generator after connecting the rectifier and the intermediate absorber in any order.

Exemplarily, the solution pump, the intermediate absorber, the rectifier and the generator are connected in sequence; or

The solution pump, the rectifier, the intermediate absorber and the generator are connected in sequence.

Exemplarily, the absorption unit further includes a solution preheater, and the solution pump is connected to the generator after connecting the rectifier, the intermediate absorber and the solution preheater in any order, The boiler unit is connected in any order connecting the solution preheater and the intermediate evaporator.

Exemplarily, the absorption unit further includes a subcooler, and the liquid outlet of the separator is sequentially connected with the working medium secondary throttle valve and the evaporator through the subcooler, and the evaporator It is connected to the absorber through the subcooler.

Exemplarily, the absorption unit further includes a solution preheater and a heat transfer medium preheater, and the rectifier is also used to heat the solution output by the solution pump, and the solution pump is connected in any order The rectifier, the intermediate absorber, and the solution preheater are then connected to the generator, and the outdoor unit is connected to the heat-carrying medium preheater, the The condenser, the absorber are connected to the heat transfer medium pump, and the boiler unit is connected to the solution preheater, the intermediate evaporator and the heat transfer medium preheater in random order.

Exemplarily, the absorption unit further includes a subcooler, and the steam outlet of the rectifier is sequentially connected with the condenser, the subcooler, the working fluid primary throttle valve, and the intermediate evaporator It is connected with the separator, and the liquid outlet of the separator is sequentially connected with the working medium secondary throttle valve, the evaporator, the subcooler and the absorber.

Exemplarily, the absorption unit further includes a solution preheater and a heat transfer medium preheater, and the rectifier is also used to heat the solution output by the solution pump, and the solution pump is connected in any order The rectifier, the intermediate absorber, and the solution preheater are then connected to the generator, and the outdoor unit is connected to the heat-carrying medium preheater, the The condenser, the absorber and the heat transfer medium pump are connected, and the boiler unit is connected in any order to connect the solution preheater, the intermediate evaporator and the heat transfer medium preheater.

Exemplarily, the combined cooling and heating unit further includes a cooling medium storage tank and a heating medium storage tank, the cooling medium storage tank is arranged between the evaporator and the cooling medium pump, the The heat transfer medium storage tank is arranged between the absorber and the heat transfer medium pump.

Exemplarily, the absorption combined cooling and heating system with an intermediate process uses at least one of water, ethylene glycol, alcohol, propylene glycol, methylene chloride, calcium chloride solution and sodium chloride solution as the cooling medium or heat transfer medium.

The absorption-type combined cooling and heating system provided by the invention includes a boiler unit, an absorption unit and a combined cooling and heating unit. The boiler unit generates heat energy through the combustion of fossil fuels or biomass, and transmits it to the absorption unit as driving energy through the heat source medium; The heating effect is generated by the distiller and the absorber, and is transmitted to the combined cooling and heating unit through the cooling medium and the heating medium; the combined cooling and heating unit realizes the heat release of the heat medium in summer and the heat absorption of the cooling medium in winter in the outdoor unit. The indoor cooling machine realizes the cooling of the cold medium in summer, and the indoor heating machine realizes the heat supply of the heat medium in winter. Through the above three processes and the corresponding valve group switching, the summer cooling and winter heating of a single absorption unit are realized, and the multi-component coupling is used to realize the cascade recovery of waste heat, which improves the primary energy efficiency of the system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 2 of the present invention;

3 is a schematic structural view of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 3 of the present invention;

Fig. 4 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 4 of the present invention;

Fig. 5 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 5 of the present invention;

Fig. 6 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 6 of the present invention;

Fig. 7 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 7 of the present invention;

Fig. 8 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 8 of the present invention;

Fig. 9 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 9 of the present invention;

Fig. 10 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 10 of the present invention;

Fig. 11 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 11 of the present invention;

Fig. 12 is a schematic structural diagram of an absorption combined cooling and heating system with an intermediate process provided by Embodiment 12 of the present invention;

Fig. 13 is a schematic structural view of a combined cooling and heating unit according to another embodiment of the present invention.

Explanation of reference numbers:

(1), boiler; (2), heat source medium pump; (3), absorption unit; (4), outdoor unit; (5), indoor cooling machine; (6), indoor heating machine; (7) , cold medium pump; (8), heat medium pump; (9), valve group; (9-1), first valve; (9-2), second valve; (9-3), third Valve; (9-4), the fourth valve; (9-5), the fifth valve; (9-6), the sixth valve; (10), generator; (11), rectifier; (12) , condenser; (13), working fluid primary throttle valve; (14), intermediate evaporator; (15), separator; (16), subcooler; (17), working medium secondary throttle valve; (18), evaporator; (19), solution primary throttle valve; (20), intermediate absorber; (21), solution secondary throttle valve; (22), absorber; (23), solution pump; (24), solution preheater; (25), heat transfer medium preheater; (26), cold transfer medium storage tank; (27), heat transfer medium storage tank.

Detailed ways

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

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

It should also be noted that when an element is referred to as being “fixed” or “disposed on” another element, it can be directly on the other element or intervening elements may also exist. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions involving "first", "second" and so on in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

As shown in Figures 1 to 13, it is an absorption combined cooling and heating system with an intermediate process according to an embodiment of the present invention, which can utilize a variety of energy sources including fossil fuels and biomass to provide a valve group (9) Switching realizes cooling in summer and heating in winter for a single absorption unit.

Please refer to Fig. 1-Fig. 13, the absorption type combined cooling and heating system with intermediate process of the embodiment of the present invention includes boiler unit, absorption type unit (3) and cooling and heating combined supply unit; absorption type unit (3) includes generation device (10), rectifier (11), condenser (12), working fluid primary throttle valve (13), intermediate evaporator (14), separator (15), working fluid secondary throttle valve (17 ), evaporator (18), solution primary throttle valve (19), intermediate absorber (20), solution secondary throttle valve (21), absorber (22) and solution pump (23); combined heating and cooling The unit includes an outdoor unit (4), an indoor cooling unit (5), an indoor heating unit (6), a cold-carrying medium pump (7), a heat-carrying medium pump (8) and a valve group (9);

The heat source medium outlet of the boiler unit is connected to the heat source medium inlet of the generator (10), the heat source medium outlet of the generator (10) is connected to the heat source medium inlet of the boiler unit, and the boiler unit and the generator (10) form a heat source medium circulation loop. The boiler unit is also connected to the intermediate evaporator (14), the fuel and air F1 enter the boiler unit through the fuel & air inlet, and become flue gas F2 after being burned in the boiler (1), and the flue gas F2 enters the intermediate evaporator (14) to carry out In the waste heat recovery process, after the temperature is lowered, it becomes flue gas F3 and is discharged from the system, thus completing the flue gas cycle.

The steam outlet of the generator (10) is connected with the steam inlet of the rectifier (11), the return port of the rectifier (11) is connected with the return port of the generator (10), and the steam outlet of the rectifier (11) is sequentially Connect with condenser (12), working fluid primary throttle valve (13), intermediate evaporator (14) and separator (15), the gas outlet of separator (15) is connected with intermediate absorber (20), separator The liquid outlet of (15) is connected with the working fluid secondary throttle valve (17), evaporator (18) and absorber (22), and the solution outlet of the generator (10) is connected with the primary throttle valve and the intermediate absorber ( 20), the solution secondary throttle valve (21), the absorber (22) and the solution pump (23) are connected, and the solution pump (23) is connected with the generator (10) through the intermediate absorber (20), thereby forming a working fluid Circulation loop, the working process of the working medium circulation loop is as follows:

The ammonia vapor generated by the generator (10) enters the rectifier (11) and undergoes a rectification process, and the generated reflux liquid enters the generator (10), and after the ammonia concentration of the ammonia vapor increases, it enters the condenser (12) and undergoes a condensation process , the condensate produced enters the intermediate evaporator (14) after being throttled by the primary throttling valve (13) of the working medium, carries out a partial evaporation process and enters the separator (15) for gas-liquid separation, wherein the ammonia vapor enters the intermediate absorber ( 20), and the liquefied ammonia enters the evaporator (18) after throttling through the secondary throttling valve (17) of the working medium, becomes ammonia vapor after the evaporation process, and enters the absorber (22); the generator (10) produces The dilute solution enters the intermediate absorber (20) after being throttled by the solution primary throttle valve (19) and undergoes an intermediate absorption process, absorbing ammonia vapor to become an intermediate solution, and the intermediate solution is throttled by the solution secondary throttle valve (21). After the flow, it enters the absorber (22), absorbs ammonia vapor and becomes a concentrated solution. After the concentrated solution is pressurized by the solution pump (23), it is heated through the intermediate absorber (20), and the temperature gradually rises and finally enters the generator ( 10), thus completing the working fluid cycle.

The valve group (9) includes a first valve (9-1), a second valve (9-2), a third valve (9-3), a fourth valve (9-4), and a fifth valve (9-5) and the sixth valve (9-6), the outdoor unit (4) is connected to the condenser (12) and the absorber (22) in any order through the first valve (9-1), and then connected to the heat transfer medium pump (8). The first outlet of the heat medium pump (8) is connected to the outdoor unit (4) through the fifth valve (9-5), and the second outlet of the heat transfer medium pump (8) is connected to the indoor power supply through the sixth valve (9-6). The heat engine (6) is connected, and the indoor heat supply engine (6) is connected to the absorber (22), thereby forming a heat transfer medium circulation loop; the outdoor unit (4) is sequentially connected to the evaporator (18 through the second valve (9-2) ) and the cooling medium pump (7), the first outlet of the cooling medium pump (7) is connected with the outdoor unit (4) through the fourth valve (9-4), the second cooling medium pump (7) The outlet is connected to the indoor cooling machine (5) through the third valve (9-3), and the indoor cooling machine (5) is connected to the evaporator (18), thereby completing the cooling medium circulation. When the combined cooling and heating unit is used for cooling, the first valve (9-1), the third valve (9-3) and the fifth valve (9-5) are opened, the second valve (9-2), the fourth valve The valve (9-4) and the sixth valve (9-6) are closed; when the combined cooling and heating unit is used for heating, the second valve (9-2), the fourth valve (9-4) and the sixth valve ( 9-6) is opened, and the first valve (9-1), the third valve (9-3) and the fifth valve (9-5) are closed.

The working process of heat transfer medium circulation and cooling medium circulation is as follows:

The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the condenser (12) and the absorber (22) in any order, and performs a cascade heating process of the heat-carrying medium, and the temperature gradually rises to become a load-carrying medium. The heat medium S5 enters the combined cooling and heating unit; the cooling medium S4 enters the absorption unit (3) from the combined cooling and heating unit, passes through the evaporator (18), absorbs cooling capacity, and the temperature drops to become the cooling medium S3 , and enter the combined cooling and heating unit; the combined cooling and heating unit has two modes of heating in winter and cooling in summer. In the mode of cooling in summer, the first valve (9-1) and the second The third valve (9-3) and the fifth valve (9-5) are opened, the second valve (9-2), the fourth valve (9-4) and the sixth valve (9-6) are closed, and the cooling medium S3 Driven by the cooling medium pump (7), it enters the indoor cooling machine (5) through the third valve (9-3), releases cooling energy to the room, and the temperature rises, becomes the cooling medium S4 and enters the absorption unit (3 ), at the same time, the heat-carrying medium S5 is driven by the heat-carrying medium pump (8), enters the outdoor unit (4) through the fifth valve (9-5), releases heat to the outside, and the temperature drops, and passes through the first valve ( 9-1) It becomes the heat transfer medium S6 and enters the absorption unit (3) to complete the cooling and heat transfer medium circulation; in the winter heating mode, the second valve (9-2) and the second The four valves (9-4) and the sixth valve (9-6) are opened, the first valve (9-1), the third valve (9-3) and the fifth valve (9-5) are closed, and the cooling medium S3 Driven by the cooling medium pump (7), it enters the outdoor unit (4) through the fourth valve (9-4). After absorbing heat from the outside, the temperature rises and becomes the cooling medium S4 and passes through the second valve (9-2). Enter the absorption unit (3), at the same time, the heat-carrying medium S5 is driven by the heat-carrying medium pump (8), enters the indoor heat supply machine (6) through the sixth valve (9-6), and the temperature after releasing heat to the room Lower, become the heat transfer medium S6 and enter the absorption unit (3), thus completing the circulation of the cooling and heat transfer medium.

The absorption combined cooling and heating system with an intermediate process of the embodiment of the present invention includes a boiler unit, an absorption unit (3) and a combined cooling and heating unit. The boiler unit generates heat energy through the combustion of fossil fuels or biomass, and transmits it to the absorption unit (3) as a driving energy through the heat source medium; the absorption unit (3) produces waste heat recovery effect in the middle evaporator (14), (18) produce refrigeration effect, generate heating effect in condenser (12), rectifier (11) and absorber (22), and transmit to cooling and heating combined supply unit through cooling medium and heat carrying medium; The joint supply unit realizes the heat release of the heat-carrying medium in summer and the heat absorption of the cold-carrying medium in the outdoor unit (4), realizes the cooling of the cold-carrying medium in the indoor cooler (5) in summer, and realizes the cooling of the cooling medium in winter in the indoor heat supply unit (6). The heat transfer medium supplies heat. Through the above three processes and the switching of the corresponding valve group (9), the summer cooling and winter heating of a single absorption unit (3) are realized, and the multi-component coupling is used to realize the cascade recovery of waste heat, which improves the primary energy efficiency of the system .

Understandably, the working fluid is liquid ammonia.

It can be understood that the cooling medium or heat medium can be water, ethylene glycol, alcohol, propylene glycol, methylene chloride, calcium chloride solution and sodium chloride solution, or any two or more of the above types The combination.

It can be understood that the outdoor unit (4) can be any one of water-cooled, air-cooled and underground pipe-type, and can also be a combination of any two or more of the above-mentioned types.

It can be understood that the indoor cooling machine (5) can be any one of fan coil type, floor radiant type and ceiling radiant type, or a combination of any two or more of the above types.

It can be understood that the indoor heating machine (6) can be any one of fan coil type, radiator type, floor radiation type and roof radiation type, or a combination of any two or more of the above types. .

Exemplarily, the boiler unit includes a boiler (1) and a heat source medium pump (2), and the boiler (1) is also connected to an intermediate evaporator (14). The working process of the boiler unit is as follows:

Fuel and air F1 enter the boiler unit from the fuel & air inlet, and become flue gas F2 after being burned in the boiler (1), and enter the intermediate evaporator (14); the heat energy generated during the combustion process is transferred to the heat source medium S1, and is pumped by the heat source medium pump (2) pumped to the absorption unit (3), the temperature decreases after heat release, becomes the heat source medium S2 and returns to the boiler (1), thereby completing the heat source medium circulation;

The flue gas F2 enters the intermediate evaporator (14) for waste heat recovery process, and becomes flue gas F3 after the temperature is lowered and is discharged out of the system, thereby completing the flue gas cycle.

It can be understood that the boiler (1) can be any one of gas-fired boiler, coal-fired boiler, oil-fired boiler, biomass boiler and methanol boiler, or a combination of any two or more of the above types.

As shown in Fig. 13, exemplarily, in some embodiments, the combined cooling and heating unit further includes a cooling medium storage tank (26) and a heat transfer medium storage tank (27), and the cooling medium storage tank (26) The heat transfer medium storage tank (27) is arranged between the absorber (22) and the heat transfer medium pump (8). The refrigerated medium S3 coming from the absorption unit (3) first enters the refrigerated medium storage tank (26) for buffering, and then is driven by the refrigerated medium pump (7); The heat-carrying medium S5 first enters the heat-carrying medium storage tank (27) for buffering, and then is driven by the heat-carrying medium pump (8).

It should be noted that in the heat transfer medium circulation circuit, the outdoor unit (4) is connected to the condenser (12) and the absorber (22) in any order through the first valve (9-1) and then connected to the heat transfer medium pump (8) , that is, the heat-carrying medium may first pass through the condenser (12) and then the absorber (22), or may first pass through the absorber (22) and then pass through the condenser (12).

It should be noted that the rectifier (11) can also be used for heating the solution output by the solution pump (23) or for heating the heat transfer medium.

When the rectifier (11) is also used to heat the heat-carrying medium, the outdoor unit (4) is connected to the condenser (12), rectifier (11) and absorber in any order through the first valve (9-1) (22) is connected with the heat transfer medium pump (8).

When the rectifier (11) was also used to heat the solution output by the solution pump (23), the solution pump (23) was connected with the generator (10) after the intermediate absorber (20) and the rectifier (11) in any order. )connect.

It should be noted that the absorption unit (3) may also include a heat-carrying medium preheater (25), which is used for preheating the heat-carrying medium and recovering the flue gas produced by the boiler unit, The outdoor unit (4) is connected to the heat-carrying medium pump (8) after connecting the heat-carrying medium preheater (25), the condenser (12) and the absorber (22) in any order through the first valve (9-1), The boiler unit is connected with the intermediate evaporator (14) and the heat transfer medium preheater (25) in any order.

It should be noted that the absorption unit (3) can also include a solution preheater (24), and the solution preheater (24) is used to preheat the solution output by the solution pump (23) and recover the flue gas produced by the boiler unit , the solution pump (23) is connected to the generator (10) after connecting the intermediate absorber (20) and the solution preheater (24) in any order, and the boiler unit is connected to the solution preheater (24) and the intermediate evaporator in any order (14).

Further, the heat transfer medium preheater (25) and the solution preheater (24) can be simultaneously, and the flue gas produced by the boiler unit passes through the intermediate evaporator (14), the solution preheater (24) and the heat transfer medium in any order. Media preheater (25).

It should be noted that when the rectifier (11) is also used to heat the heat-carrying medium, and the absorption unit (3) also includes a heat-carrying medium preheater (25), the outdoor unit (4) passes through the first valve (9-1) Connect the heat-carrying medium preheater (25), rectifier (11), condenser (12) and absorber (22) in any order and then connect to the heat-carrying medium pump (8).

It should be noted that when the rectifier (11) is also used to heat the solution output by the solution pump (23), and the absorption unit (3) also includes a solution preheater (24), the solution pump (23) After connecting the solution preheater (24), the intermediate absorber (20) and the rectifier (11) in sequence, it is connected with the generator (10).

It should be noted that the absorption unit (3) can also include a subcooler (16), and the subcooler (16) can be used for subcooling the condensate produced by the condenser (12), and the subcooler (16 ) can also be used to carry out the heat recovery process to the ammonia vapor exported by the evaporator (18), and the subcooler (16) can also be used to carry out the subcooling process to the liquid ammonia exported by the separator (15).

Different implementation manners are used for description below, and only the differences of the embodiments are described below, and the rest of the description may refer to the foregoing description.

Example 1

Please refer to Figure 1. Exemplarily, the outdoor unit (4), the first valve (9-1), the condenser (12), the absorber (22) and the heat-carrying medium pump (8) are connected in sequence to carry out heat-carrying medium In the cascade heating process, the temperature gradually rises to become the heat transfer medium S5, and enters the combined cooling and heating unit.

The rectifier (11) is also used to heat the solution output by the solution pump (23), and the solution pump (23), rectifier (11), intermediate absorber (20) and generator (10) are connected in sequence, increasing The pressurized concentrated solution passes through the rectifier (11) and the intermediate absorber (20) successively, undergoes a stepwise solution heating process, the temperature gradually rises and finally enters the generator (10), and the pressurized concentrated solution undergoes rectification in turn The device (11) and the intermediate absorber (20) carry out the stepwise heating process of the solution, and the temperature gradually increases and finally enters the generator (10).

Example 2

Please refer to Figure 2. Exemplarily, the outdoor unit (4), the first valve (9-1), the condenser (12), the absorber (22) and the heat-carrying medium pump (8) are connected in sequence to carry out heat-carrying medium In the cascade heating process, the temperature gradually rises to become the heat transfer medium S5, and enters the combined cooling and heating unit.

The rectifier (11) is also used to heat the solution output by the solution pump (23), the solution pump (23), the intermediate absorber (20), the rectifier (11) and the generator (10) are connected in sequence, increasing The compressed concentrated solution passes through the intermediate absorber (20) and the rectifier (11) successively, undergoes a stepwise solution heating process, the temperature rises gradually and finally enters the generator (10).

Example 3

Please refer to Fig. 3. Exemplarily, the outdoor unit (4), the first valve (9-1), the absorber (22), the condenser (12) and the heat transfer medium pump (8) are connected in sequence, and the heat transfer medium S6 Enter the absorption unit (3) from the cooling and heating combined supply unit, pass through the absorber (22) and the condenser (12) in sequence, carry out the heat-carrying medium cascade heating process, the temperature gradually rises to become the heat-carrying medium S5, and enters Combined cooling and heating unit.

The rectifier (11) is also used to heat the solution output by the solution pump (23), and the solution pump (23), rectifier (11), intermediate absorber (20) and generator (10) are connected in sequence, increasing The pressurized concentrated solution passes through the rectifier (11) and the intermediate absorber (20) successively, undergoes a stepwise solution heating process, the temperature gradually rises and finally enters the generator (10), and the pressurized concentrated solution undergoes rectification in turn The device (11) and the intermediate absorber (20) carry out the stepwise heating process of the solution, and the temperature gradually increases and finally enters the generator (10).

Example 4

Please refer to Fig. 4. Exemplarily, the outdoor unit (4), the first valve (9-1), the absorber (22), the condenser (12) and the heat transfer medium pump (8) are connected in sequence, and the heat transfer medium S6 Enter the absorption unit (3) from the combined cooling and heating unit, pass through the absorber (22) and the condenser (12) in sequence, and carry out the heat-carrying medium cascade heating process, the temperature gradually rises to become the heat-carrying medium S5, and enters the Combined cooling and heating unit.

The rectifier (11) is also used to heat the solution output by the solution pump (23), the solution pump (23), the intermediate absorber (20), the rectifier (11) and the generator (10) are connected in sequence, increasing The compressed concentrated solution passes through the intermediate absorber (20) and the rectifier (11) successively, undergoes a stepwise solution heating process, the temperature rises gradually and finally enters the generator (10).

Example 5

Please refer to Fig. 5, illustratively, the rectifier (11) is also used to heat the heat transfer medium, the outdoor unit (4), the first valve (9-1), the condenser (12), the rectifier ( 11), the absorber (22) and the heat transfer medium pump (8) are connected in sequence. The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, and passes through the condenser (12), rectifier (11) and absorber (22) successively, and the heat-carrying medium is heated in steps, and the temperature gradually rises High becomes the heat transfer medium S5, and enters the combined cooling and heating unit.

Example 6

Please refer to Fig. 6, illustratively, the rectifier (11) is also used for heating the heat-carrying medium, and the outdoor unit (4), the first valve (9-1), the absorber (22), the condenser (12 ), rectifier (11) and heat-carrying medium pump (8) are connected successively. The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, passes through the absorber (22) and the condenser (12) successively, and undergoes a cascade heating process of the heat-carrying medium, and the temperature gradually rises to become the heat-carrying medium S5, And into the combined cooling and heating unit.

Example 7

Please refer to Fig. 7, exemplarily, the absorption type unit (3) also includes heat transfer medium preheater (25), outdoor unit (4), first valve (9-1), heat transfer medium preheater (25 ), the condenser (12), the absorber (22) and the heat transfer medium pump (8) are connected in sequence, the boiler unit connection, the intermediate evaporator (14) and the heat transfer medium preheater (25) are connected in sequence.

The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, and passes through the heat-carrying medium preheater (25), condenser (12) and absorber (22) successively for cascade heating of the heat-carrying medium process, the temperature gradually rises to become the heat transfer medium S5, and enters the combined cooling and heating unit.

The flue gas F2 passes through the intermediate evaporator (14) and the heat transfer medium preheater (25) successively to perform a cascade recovery process of waste heat, and the temperature gradually decreases to become flue gas F3 and is discharged from the system, thereby completing the flue gas cycle.

Example 8

Referring to Fig. 8, illustratively, the absorption unit (3) also includes a heat-carrying medium preheater (25), and the rectifier (11) is also used to heat the heat-carrying medium, and the outdoor unit (4), the second A valve (9-1), heat transfer medium preheater (25), condenser (12), rectifier (11), absorber (22) and heat transfer medium pump (8) are connected in sequence, and the boiler unit is connected , an intermediate evaporator (14) and a heat transfer medium preheater (25) are connected in sequence.

The heat transfer medium S6 enters the absorption unit (3) from the combined cooling and heating unit, preferably, it passes through the heat transfer medium preheater (25), condenser (12), rectifier (11) and absorber in sequence (22) The stepwise heating process of the heat-carrying medium is carried out, and the temperature gradually rises to become the heat-carrying medium S5, which enters the combined cooling and heating unit.

The flue gas F2 preferably passes through the intermediate evaporator (14) and the heat-carrying medium preheater (25) successively to perform a cascade recovery process of waste heat, and the temperature gradually decreases to become flue gas F3 and is discharged from the system, thereby completing the flue gas cycle .

Example 9

Referring to Fig. 9, illustratively, the absorption unit (3) also includes a solution preheater (24), an outdoor unit (4), a first valve (9-1), a condenser (12), an absorber (22 ) and the heat-carrying medium pump (8) are connected in turn, and the rectifier (11) is also used to heat the solution coming out of the solution pump (23), the solution pump (23), the rectifier (11), the intermediate absorber ( 20), the solution preheater (24) and the generator (10) are connected in sequence, the boiler unit is connected, the solution preheater (24) and the intermediate evaporator (14) are connected in sequence.

The pressurized concentrated solution passes through the rectifier (11), the intermediate absorber (20) and the solution preheater (24) successively, undergoes a stepwise solution heating process, the temperature gradually rises and finally enters the generator (10).

The flue gas F2 passes through the solution preheater (24) and the intermediate evaporator (14) successively to perform a cascade waste heat recovery process. After the temperature gradually decreases, it becomes flue gas F3 and is discharged from the system, thereby completing the flue gas cycle.

Example 10

Referring to Fig. 10, illustratively, the absorption unit (3) also includes a solution preheater (24), and the rectifier (11) is also used to heat the heat transfer medium, the outdoor unit (4), the first valve (9-1), condenser (12), rectifier (11) and absorber (22) are connected sequentially, solution pump (23), intermediate absorber (20), solution preheater (24) and generator (10) connected in sequence, the boiler unit connection, the solution preheater (24) and the intermediate evaporator (14) are connected in sequence.

The pressurized concentrated solution passes through the intermediate absorber (20) and the solution preheater (24) successively, undergoes a stepwise solution heating process, the temperature gradually rises and finally enters the generator (10).

The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, and passes through the condenser (12), rectifier (11) and absorber (22) successively to carry out the cascade heating process of the heat-carrying medium, and the temperature Gradually rise to become the heat transfer medium S5, and enter the combined cooling and heating unit.

The flue gas F2 passes through the solution preheater (24) and the intermediate evaporator (14) successively to perform a cascade waste heat recovery process. After the temperature gradually decreases, it becomes flue gas F3 and is discharged from the system, thereby completing the flue gas cycle.

Example 11

Referring to Fig. 11, illustratively, the absorption unit (3) also includes a subcooler (16), a solution preheater (24) and a heat transfer medium preheater (25), and the liquid outlet of the separator (15) The subcooler (16) is sequentially connected with the working fluid secondary throttle valve (17) and the evaporator (18), the evaporator (18) is connected with the absorber (22) through the subcooler (16), and the rectifier (11) is also used for heating the solution output by solution pump (23), solution pump (23), rectifier (11), intermediate absorber (20), solution preheater (24) and generator (10) ), the outdoor unit (4), the first valve (9-1), the heat transfer medium preheater (25), the condenser (12), the absorber (22) and the heat transfer medium pump (8) are connected in sequence , the boiler unit is connected, the solution preheater (24), the intermediate evaporator (14) and the heat transfer medium preheater (25) are connected in sequence.

The ammonia vapor generated by the generator (10) enters the rectifier (11) and undergoes a rectification process, and the generated reflux liquid enters the generator (10), and after the ammonia concentration of the ammonia vapor increases, it enters the condenser (12) and undergoes a condensation process , the condensate produced enters the intermediate evaporator (14) after being throttled by the primary throttling valve (13) of the working medium, performs a partial evaporation process and enters the separator (15) for gas-liquid separation, wherein ammonia vapor enters The intermediate absorber (20), while the liquid ammonia enters the subcooler (16), the temperature decreases after the subcooling process, and enters the evaporator (18) after throttling through the secondary throttling valve (17) of the working medium , becomes ammonia vapor after the evaporation process, enters the subcooler (16), increases in temperature after the reheating process, and enters the absorber (22).

The pressurized concentrated solution passes through the rectifier (11), the intermediate absorber (20) and the solution preheater (24) successively, undergoes a stepwise solution heating process, the temperature gradually rises and finally enters the generator (10).

The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, and passes through the heat-carrying medium preheater (25), condenser (12) and absorber (22) successively for cascade heating of the heat-carrying medium process, the temperature gradually rises to become the heat transfer medium S5, and enters the combined cooling and heating unit.

The flue gas F2 passes through the solution preheater (24), the intermediate evaporator (14) and the heat transfer medium preheater (25) successively to perform a cascade recovery process of waste heat, and after the temperature gradually decreases, it becomes flue gas F3 and is discharged from the system , thus completing the flue gas cycle.

Example 12

Referring to Fig. 12, illustratively, the absorption unit (3) also includes a subcooler (16), a solution preheater (24) and a heat transfer medium preheater (25), and the steam of the rectifier (11) The outlet is connected with condenser (12), subcooler (16), working fluid primary throttle valve (13), intermediate evaporator (14) and separator (15) in sequence, and the liquid outlet of separator (15) is connected with Working fluid secondary throttle valve (17), evaporator (18), subcooler (16) and absorber (22) are connected, and rectifying device (11) is also used for carrying out the solution that solution pump (23) outputs Heating, solution pump (23), rectifier (11), intermediate absorber (20), solution preheater (24) and generator (10) are connected in sequence, outdoor unit (4), first valve (9- 1), heat transfer medium preheater (25), condenser (12), absorber (22) and heat transfer medium pump (8) are connected in sequence, boiler unit is connected, solution preheater (24), intermediate evaporator (14) is sequentially connected with the heat-carrying medium preheater (25).

The ammonia vapor generated by the generator (10) enters the rectifier (11) and undergoes a rectification process, and the generated reflux liquid enters the generator (10), and after the ammonia concentration of the ammonia vapor increases, it enters the condenser (12) and undergoes a condensation process , the condensate produced enters the subcooler (16), the temperature decreases after the subcooling process, and enters the intermediate evaporator (14) after being throttled by the primary throttling valve (13) of the working medium to perform a partial evaporation process And enter the separator (15) for gas-liquid separation, wherein the ammonia vapor enters the intermediate absorber (20), and the liquid ammonia enters the evaporator (18) after throttling through the secondary throttling valve (17) of the working medium , becomes ammonia vapor after the evaporation process, enters the subcooler (16), increases in temperature after the reheating process, and enters the absorber (22).

The pressurized concentrated solution passes through the rectifier (11), the intermediate absorber (20) and the solution preheater (24) successively, undergoes a stepwise solution heating process, the temperature gradually rises and finally enters the generator (10).

The heat-carrying medium S6 enters the absorption unit (3) from the combined cooling and heating unit, and passes through the heat-carrying medium preheater (25), condenser (12) and absorber (22) successively for cascade heating of the heat-carrying medium process, the temperature gradually rises to become the heat transfer medium S5, and enters the combined cooling and heating unit.

The flue gas F2 passes through the solution preheater (24), the intermediate evaporator (14) and the heat transfer medium preheater (25) successively, and performs a cascade recovery process of waste heat. After the temperature gradually decreases, it becomes flue gas F3 and is discharged from the system, thereby Complete the flue gas cycle.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (18)

1. An absorption combined cooling and heating system with an intermediate process is characterized in that it includes a boiler unit, an absorption unit and a combined cooling and heating unit; the absorption unit includes a generator, a rectifier, a condenser, Working fluid primary throttle valve, intermediate evaporator, separator, working fluid secondary throttle valve, evaporator, solution primary throttle valve, intermediate absorber, solution secondary throttle valve, absorber and solution pump; The cooling and heating unit includes an outdoor unit, an indoor cooling machine, an indoor heating machine, a cooling medium pump, a heat carrying medium pump and a valve group; The heat source medium outlet of the boiler unit is connected to the heat source medium inlet of the generator, the heat source medium outlet of the generator is connected to the heat source medium inlet of the boiler unit, and the boiler unit is also connected to the intermediate evaporator, wherein Fuel and air enter the boiler unit and become the first flue gas after being burned in the boiler unit. The first flue gas enters the intermediate evaporator for waste heat recovery process. After the temperature is lowered, it becomes the second flue gas and is discharged from the system, thereby Complete the flue gas cycle; The steam outlet of the generator is connected with the steam inlet of the rectifier, the return port of the rectifier is connected with the return port of the generator, and the steam outlet of the rectifier is connected with the condenser in turn. , the working fluid primary throttle valve, the intermediate evaporator is connected to the separator, the gas outlet of the separator is connected to the intermediate absorber, and the liquid outlet of the separator is sequentially connected to the working fluid The secondary throttle valve, the evaporator and the absorber are connected, and the solution outlet of the generator is connected with the primary throttle valve, the intermediate absorber, the solution secondary throttle valve, the The absorber is connected to the solution pump, and the solution pump is connected to the generator through the intermediate absorber; The valve group includes a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve, and the outdoor unit is connected to the condenser and the The absorber is connected to the heat transfer medium pump, the first outlet of the heat transfer medium pump is connected to the outdoor unit through the fifth valve, and the second outlet of the heat transfer medium pump is connected to the sixth valve It is connected with the indoor heat supply machine, and the indoor heat supply machine is connected with the absorber; the outdoor unit is sequentially connected with the evaporator and the cooling medium pump through the second valve, and the cooling medium pump The first outlet of the medium pump is connected to the outdoor unit through the fourth valve, the second outlet of the cooling medium pump is connected to the indoor cooler through the third valve, and the indoor cooler connected to the evaporator; the combined cooling and heating unit is used for cooling, the first valve, the third valve and the fifth valve are opened, and the second valve, the fourth valve and the The sixth valve is closed; the combined cooling and heating unit is used for heat supply, the second valve, the fourth valve and the sixth valve are opened, and the first valve, the third valve and the The fifth valve is closed. 2. The absorption-type combined cooling and heating system with an intermediate process as claimed in claim 1, wherein the boiler unit includes a boiler and a heat source medium pump, and the heat energy generated by the boiler is transported to the the generator. 3. The absorption combined cooling and heating system with intermediate process according to claim 1, characterized in that, the outdoor unit, the first valve, the condenser, the absorber and the heat carrier The media pumps are connected sequentially; or The outdoor unit, the first valve, the absorber, the condenser and the heat transfer medium pump are connected in sequence. 4. The absorption-type combined cooling and heating system with an intermediate process according to claim 1, wherein the rectifier is also used to heat the heat-carrying medium, and the outdoor unit passes through the first valve After connecting the condenser, the rectifier and the absorber in any order, they are connected to the heat transfer medium pump. 5. The absorption-type combined cooling and heating system with intermediate process as claimed in claim 4, characterized in that, the outdoor unit, the first valve, the condenser, the rectifier, the absorption The device and the heat-carrying medium pump are connected in sequence; or The outdoor unit, the first valve, the absorber, the condenser, the rectifier and the heat transfer medium pump are connected in sequence. 6. The absorption-type combined cooling and heating system with intermediate process according to claim 4, characterized in that, the absorption unit further comprises a heat-carrying medium preheater, and the outdoor unit passes through the first valve to The heat-carrying medium preheater, the condenser, the rectifier and the absorber are connected in any order and then connected to the heat-carrying medium pump, and the boiler unit is connected to the intermediate evaporator in any order and the heat transfer medium preheater. 7. The absorption-type combined cooling and heating system with intermediate process as claimed in claim 6, characterized in that, the outdoor unit, the first valve, the heat-carrying medium preheater, the condenser, The rectifier, the absorber and the heat transfer medium pump are connected in sequence, the boiler unit is connected, the intermediate evaporator and the heat transfer medium preheater are connected in sequence; or The outdoor unit, the first valve, the heat transfer medium preheater, the condenser, the rectifier, the absorber and the heat transfer medium pump are connected in sequence, and the boiler unit is connected to , the intermediate evaporator and the heat transfer medium preheater are connected in sequence. 8. The absorption combined cooling and heating system with intermediate process as claimed in claim 4, characterized in that, the absorption unit further comprises a solution preheater, and the solution pump is connected to the intermediate absorber in any order , the solution preheater is connected with the generator, and the boiler unit is connected with the solution preheater and the intermediate evaporator in any order. 9. The absorption-type combined cooling and heating system with an intermediate process according to claim 1, characterized in that, the absorption unit further comprises a heat-carrying medium preheater, and the outdoor unit passes through the first valve to The heat-carrying medium preheater, the condenser and the absorber are connected in any order and then connected to the heat-carrying medium pump, and the boiler unit is connected to the intermediate evaporator and the heat-carrying medium in any order Preheater. 10. The absorption-type combined cooling and heating system with an intermediate process as claimed in claim 1, wherein the rectifier is also used to heat the solution output by the solution pump, and the solution pump uses any After connecting the rectifier and the intermediate absorber in sequence, it is connected with the generator. 11. The absorption combined cooling and heating system with intermediate process as claimed in claim 10, characterized in that, the solution pump, the intermediate absorber, the rectifier and the generator are sequentially connected; or The solution pump, the rectifier, the intermediate absorber and the generator are connected in sequence. 12. The absorption combined cooling and heating system with intermediate process as claimed in claim 10, characterized in that, the absorption unit further comprises a solution preheater, and the solution pump is connected to the rectifier in any order , the intermediate absorber and the solution preheater are connected to the generator, and the boiler unit is connected to the solution preheater and the intermediate evaporator in any order. 13. The absorption combined cooling and heating system with intermediate process according to claim 1, characterized in that, the absorption unit further comprises a subcooler, and the liquid outlet of the separator passes through the subcooler in turn It is connected with the secondary throttling valve of the working medium and the evaporator, and the evaporator is connected with the absorber through the subcooler. 14. The absorption combined cooling and heating system with intermediate process as claimed in claim 13, characterized in that, the absorption unit further comprises a solution preheater and a heat transfer medium preheater, and the rectifier further comprises It is used to heat the solution output by the solution pump. The solution pump is connected to the generator after connecting the rectifier, the intermediate absorber and the solution preheater in any order. The outdoor The machine is connected to the heat-carrying medium preheater, the condenser, and the absorber in any order through the first valve, and then connected to the heat-carrying medium pump, and the boiler unit is connected to the heat-carrying medium pump in any order. The solution preheater, the intermediate evaporator and the heat transfer medium preheater. 15. The absorption combined cooling and heating system with intermediate process as claimed in claim 1, characterized in that, the absorption unit further comprises a subcooler, and the steam outlet of the rectifier is sequentially connected with the condenser , the subcooler, the working fluid primary throttle valve, the intermediate evaporator and the separator are connected, and the liquid outlet of the separator is connected with the working medium secondary throttle valve, the evaporator device, the subcooler and the absorber are connected. 16. The absorption combined cooling and heating system with intermediate process as claimed in claim 15, characterized in that, the absorption unit further comprises a solution preheater and a heat transfer medium preheater, and the rectifier further comprises It is used to heat the solution output by the solution pump. The solution pump is connected to the generator after connecting the rectifier, the intermediate absorber and the solution preheater in any order. The outdoor The machine is connected to the heat transfer medium preheater, the condenser, the absorber and the heat transfer medium pump in any order through the first valve, and the boiler unit is connected to the solution in any order. A preheater, the intermediate evaporator and the heat transfer medium preheater. 17. The absorption-type combined cooling and heating system with an intermediate process according to claim 1, characterized in that, the combined cooling and heating unit further includes a storage tank for a cooling medium and a storage tank for a heating medium, and the storage tank for a cooling medium The medium storage tank is arranged between the evaporator and the cooling medium pump, and the heat-carrying medium storage tank is arranged between the absorber and the heat-carrying medium pump. 18. The absorption-type combined cooling and heating system with an intermediate process as claimed in claim 1, wherein the absorption-type combined cooling and heating system with an intermediate process uses water, ethylene glycol, alcohol, propylene glycol, At least one of methyl chloride, calcium chloride solution and sodium chloride solution is used as a cooling medium or a heat medium.

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