CN214039035U - Coupled heat pump unit - Google Patents

Abstract

The utility model discloses a coupling heat pump unit, which comprises an absorption module and a compression module, wherein the outlet of the coupling evaporator is communicated with the refrigerant inlet of the evaporator through a parallel branch pipe and a throttling component, in the starting or running process of the unit, the opening setting of an auxiliary switch valve on the branch pipe can be combined with the running working condition of a compressor and the absorption module, the refrigerant accumulated in the coupling evaporator is returned to the evaporator through the switch valve, the low-pressure alarm stop of the evaporator is avoided, the stable running of the unit is maintained, simultaneously, when the load of the unit is changed, the auxiliary switch valve is opened to a certain opening when the exhaust pressure of the compressor is overhigh, so that the part or all the refrigerants at the outlet position of the coupling evaporator directly reach the inlet of the evaporator through the auxiliary switch valve, thus the exhaust pressure of the compressor can be reduced, and the pressure of an air suction port is increased, the work of the compressor is reduced, and the high-pressure alarm shutdown of the exhaust of the compressor is effectively avoided.

Description

Coupled heat pump unit

Technical Field

The utility model relates to a heat recovery technical field, in particular to manifold type heat pump set.

Background

Heat pump units are classified into electric drive heat pumps, gas drive heat pumps, and absorption heat pumps according to their driving methods.

The electrically driven heat pump is in a compression type working mode, the main components of the electrically driven heat pump comprise a compressor, a throttling component, an evaporator and a condenser, a refrigerant circularly flows in a refrigerant circulating pipeline formed by the compressor, and energy required by the compressor to do work is derived from electric energy. The refrigerant is compressed in the compressor to form a high-temperature high-pressure refrigerant medium, the high-temperature high-pressure refrigerant medium is condensed in the condenser to form a liquid refrigerant medium, the liquid refrigerant medium enters the evaporator through the throttling component, absorbs heat in the evaporator and finally returns to the compressor, and the compressor compresses the refrigerant again to program the high-temperature high-pressure medium. The compressor has high power consumption cost, low COP and poor investment return.

The absorption heat pump is a unit which utilizes a small amount of high-temperature heat source as a driving heat source, lithium bromide solution or other solutions as an absorbent, water level refrigerant and a low-temperature heat source for recycling. Namely, a small amount of high-temperature heat source can be utilized to convert low-temperature waste heat into the required medium-temperature heat source. The temperature of the low-temperature waste heat usually has certain requirements, the temperature of the low-temperature waste heat cannot be too low, and is about 15 ℃ at present, so that the limitation of the absorption unit on the utilization of the external waste heat is limited.

Although some existing waste heat recovery systems work by combining an electric drive and an absorption principle, the two working principles are quite different, and the two systems work in parallel, so that the technical problems of difficulty in matching and poor working stability of the systems exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a move stably and can retrieve coupled heat pump set of low-quality waste heat of lower temperature.

The utility model provides a coupling heat pump unit, which comprises an absorption module and a compression module, wherein the compression module at least comprises a compressor, a throttling component and an evaporator; the absorption module at least comprises a generator, a condenser, an absorber and a coupled evaporator, wherein the generator and the absorber can form an absorbent solution circulation loop, and the condenser is used for condensing refrigerant vapor generated by the generator; the compressor, a first heat exchange pipeline inside the coupled evaporator, the throttling component and the evaporator are sequentially communicated through pipelines to form a refrigerant main circulation loop; when the heat exchanger works, at least part of high-temperature refrigerant discharged by the compressor can heat the refrigerant in the coupled evaporator when flowing through the first heat exchange pipeline so as to prepare steam required by the absorber;

the evaporator comprises a first heat exchange pipeline, a throttling component and a dual-purpose branch pipeline, wherein the throttling component is connected with the first heat exchange pipeline in parallel, an inlet of the dual-purpose branch pipeline can be communicated with an outlet of the first heat exchange pipeline, an outlet of the dual-purpose branch pipeline is communicated with a refrigerant inlet of the evaporator, and the dual-purpose branch pipeline is provided with an auxiliary switch valve for controlling the opening degree of the dual-purpose branch pipeline.

In the starting or running process of the unit, the opening setting of the auxiliary switch valve on the branch pipeline can be combined with the running working conditions of the compressor and the absorption module, the refrigerant accumulated in the coupled evaporator is returned to the evaporator through the switch valve, the low-pressure alarm stop of the evaporator is avoided, the stable running of the unit is maintained, meanwhile, when the load of the unit changes and the exhaust pressure of the compressor is too high, the auxiliary switch valve is opened to a certain opening degree, so that part or all of the refrigerant at the outlet of the coupled evaporator directly reaches the inlet of the evaporator through the auxiliary switch valve, thereby greatly reducing the pressure difference between the air inlet and the air outlet of the compressor, reducing the work of the compressor, the high-pressure alarm shutdown of the exhaust pressure of the compressor can be effectively avoided, the buffering time is reserved for adjusting the load of the absorption type module, the effect of maintaining the continuous operation of the coupled heat pump unit is achieved, and the capacity adjusting range of the compression type module is enlarged.

And, the utility model provides a coupled heat pump set can retrieve the heat of the following low-quality waste heat of zero degree, has improved coupled heat pump set's use flexibility greatly.

Optionally, the coupled evaporator includes a box body having an inner cavity, the box body is provided with a refrigerant inlet, a steam outlet, a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is communicated with the liquid refrigerant outlet of the condenser and the inner cavity, the steam outlet is communicated with the absorbent solution cavity of the absorber, the first heat exchange pipeline is located inside the box body, and two ends of the first heat exchange pipeline are communicated with corresponding refrigerant pipelines outside through the refrigerant inlet and the refrigerant outlet.

Optionally, the number of the coupled evaporators is two or more, the absorbers correspond to the coupled evaporators one by one, and the first heat exchange pipes in each coupled evaporator are connected in series or in parallel or in series and parallel between the compressor and the throttling component.

Optionally, the absorption module is a single-stage module, and the number of the generator, the condenser, the absorber and the coupled evaporator is one;

alternatively, the first and second electrodes may be,

the number of the generators and the number of the condensers are one, the number of the absorbers and the number of the coupled evaporators are N, wherein N is more than or equal to 2, one absorber corresponds to one coupled evaporator, and the generators, the condensers, all absorbers and all coupled evaporators form N-stage absorption modules; at least one or several first heat exchange pipes inside the coupled evaporator are connected in series or in parallel or in series and parallel between the compressor and the throttling part.

Optionally, the generator at least comprises a high-temperature generator and a low-temperature generator, and the number of the absorber and the number of the coupled evaporators are one or both N;

wherein N is greater than or equal to 2, one absorber corresponds to one coupled evaporator, and the generator, the condenser, all absorbers and all coupled evaporators form an N-stage absorption module; at least one or several of the first heat exchange tubes of the coupled evaporator are connected in series or in parallel or in series and parallel between the compressor and the throttling part.

Optionally, the heat exchanger further comprises a pumping circulation pipeline, and the pumping circulation pipeline is used for pumping the liquid refrigerant in the inner cavity to the top of the inner cavity so that the liquid refrigerant exchanges heat with the refrigerant in the first heat exchange channel.

Optionally, the absorber and the coupled evaporator are of an integrated structure, the integrated structure includes a housing, the housing has an inner space forming the absorber and the coupled evaporator through a partition, and the vapor outlet is located on the corresponding partition; or the absorber and the coupled evaporator are in a split type independent structure;

or/and the first and/or second light-emitting diodes are arranged in the light-emitting diode,

the generator and the condenser are of an integrated structure or a split type independent structure.

Optionally, the heat exchange pipe inside the absorber and the cooling water pipe inside the condenser are connected in series or in parallel or in series and parallel;

or/and the generator is a hot water driven generator, a steam driven generator or a flue gas driven generator;

or/and the compressor is a single-stage compressor; or the compressor is a two-stage compressor, the compression module further comprises an economizer, the economizer is positioned at the downstream of the outlet of the first heat exchange pipeline of the coupled evaporator, the throttling component is positioned between the economizer and the refrigerant inlet of the evaporator, and the compressor, the first heat exchange pipeline in the coupled evaporator, the economizer, the throttling component and the evaporator are sequentially communicated to form a refrigerant main circulation loop; and the inlet of the dual-purpose branch pipeline is connected with the inlet of the economizer and the first heat exchange pipeline communication pipeline, and the outlet of the dual-purpose branch pipeline is connected with the downstream pipeline of the throttling component.

Optionally, the auxiliary switch valve is an adjustable electric control valve.

Drawings

FIG. 1 is a schematic structural view of a coupled heat pump unit according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a coupled heat pump unit according to a second embodiment of the present invention;

FIG. 3 is a schematic structural view of a coupled heat pump unit according to a third embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a coupled heat pump unit according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural view of a coupled heat pump unit according to a fifth embodiment of the present invention

Fig. 6 is a schematic structural diagram of a coupled heat pump unit according to a sixth embodiment of the present invention.

Wherein, in fig. 1 to 6:

1-an absorption module; 10-an absorber; 11-a first absorber; 12-a second absorber; 1-2-shell; 20-coupled evaporator; 21-a first coupled evaporator; 22-a second coupled evaporator; 30-a generator; 31-a high temperature generator; 32-a low temperature generator; 40-a condenser; 3-4-cylinder body; 18-a pump; 15-a first solution pump; 19-a second solution pump; 202-a heat exchanger;

2-a compressor; 2 a-a bypass branch; 2 b-dual purpose branch line; 3-an evaporator; 5-a throttling component; 6-auxiliary switch valve; 7-an economizer.

Detailed Description

A great deal of research is carried out on various heat pump units in the prior art, and particularly, the technical problem that the working performance is unstable and the heat pump units cannot work due to the fact that the current compressor heat pump structure and the current absorption heat pump structure are difficult to match when combined for use is intensively researched. The research shows that when the compression heat pump unit and the absorption heat pump unit run in a combined mode, the compression heat pump unit and the absorption heat pump unit are influenced by condensation in the shutdown or running process, the refrigerant in the compression heat pump unit is easy to gather in the absorption heat pump unit, the refrigerant is insufficient in an evaporator, the low-pressure alarm shutdown of the evaporator in the compression heat pump unit is caused in the starting or running process of the traditional coupling machine, and the units cannot run stably.

Based on the above research findings, the present inventors have conducted extensive research and experiments and have proposed a solution.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a coupled heat pump unit according to a first embodiment of the present invention.

The utility model provides a manifold type heat pump set, including absorption formula module and compression module.

The working principle of the absorption module 1 is basically the same as that of the current absorption heat pump. The absorption module 1 comprises at least a generator 30, a condenser 40, an absorber 10 and a coupled evaporator 20, that is to say both the generator 30 and the absorber 10 are able to form an absorbent solution circulation loop. The heat exchange tube inside the generator 30 can be communicated with an external high-temperature driving heat source, under the action of the high-temperature driving heat source, part of the refrigerant in the dilute solution flowing back to the generator 30 is evaporated to form refrigerant vapor, the refrigerant vapor becomes a concentrated solution and enters the absorber 10 again, and the concentrated solution is diluted in the absorber 10 to emit heat to heat cooling water (or hot water) inside the heat exchange tube inside the absorber 10. The diluted weak solution in the absorber 10 is returned to the generator 30 again through a line.

Wherein the refrigerant vapor evaporated from the generator 30 is condensed in the condenser 40 to form refrigerant water, which can be used in the coupled evaporator 20 to generate the refrigerant vapor required by the absorber 10.

The utility model discloses well compression type module includes compressor 2, throttle part 5 and evaporimeter 3 at least, and wherein, the gas vent of compressor 2 can communicate the inside first heat transfer pipeline of coupled evaporator 20 in the absorption formula module 1 through the pipeline, and compressor 2, first heat transfer pipeline, throttle part 5 and the inside heat exchange tube of evaporimeter 3 can communicate in proper order through the pipeline and form refrigerant main circulation circuit. The medium in the middle compression type module of the utility model can refer to the prior art, and the text does not limit. The throttle member 5 may be an expansion valve, or may have another structure capable of performing a throttle expansion function.

The utility model discloses when the highly compressed refrigerant medium of high temperature that well 2 gas vents of compressor flow out flows through first heat transfer pipeline, its partial heat is used for preparing the required steam of absorber, and 2 exhaust high temperature refrigerants of compressor can heat the inside cryogen of coupled evaporator 20 when first heat transfer pipeline flows through promptly in order to prepare the required steam of absorber, and the steam that coupled evaporator 20 produced lets in absorber 10 inside and is absorbed by concentrated solution. The heat of the high-temperature refrigerant medium can be directly transferred to the refrigerant to form refrigerant steam, and can also be indirectly transferred to the refrigerant through a third medium. The heat of the high-temperature refrigerant medium is preferably directly transferred to the refrigerant to generate refrigerant steam, so that the connection structure of the unit is simplified, the heat loss is reduced, and the heat utilization rate is improved.

The utility model provides a coupled heat pump set is still including concurrently using branch pipe way 2b, parallelly connected with throttling component 5, and concurrently using branch pipe way 2 b's import can communicate the export of first heat transfer pipeline, the refrigerant import of export intercommunication evaporimeter to be provided with auxiliary switch valve 6 on concurrently using branch pipe way 2b for the aperture of control concurrently using branch pipe way 2 b.

In the starting or running process of the unit, the opening setting of the auxiliary switch valve 6 on the branch pipeline 2b can be combined with the running working conditions of the compressor 2 and the absorption type module 1, the refrigerant accumulated in the coupled evaporator returns to the evaporator 3 through the switch valve, the low-pressure alarm stop of the evaporator 3 is avoided, the stable running of the unit is maintained, meanwhile, when the load of the unit changes and the exhaust pressure of the compressor is overhigh, the auxiliary switch valve is opened to a certain opening, so that part or all of the refrigerant at the outlet position of the coupled evaporator directly reaches the inlet of the evaporator 3 through the auxiliary switch valve 6, the pressure difference between the air inlet and the exhaust of the compressor 2 is greatly reduced, the work done by the compressor 2 is reduced, the high-pressure alarm stop of the exhaust pressure of the compressor 2 can be effectively avoided, the buffer time is reserved for the load adjustment of the absorption type module 1, and the effect of maintaining the continuous running of the coupled type heat pump unit is achieved, the capacity adjustment range of the compression module is increased.

And, the utility model provides a coupled heat pump set can retrieve the heat of the following low-quality waste heat of zero degree, has improved coupled heat pump set's use flexibility greatly.

Wherein the resistance value of the auxiliary switching valve 6 is necessarily smaller than the resistance value of the throttling part 5. The auxiliary switch valve 6 also has a rectifying effect on the refrigerant medium flowing out of the coupled evaporator.

In one embodiment, the coupled evaporator 20 includes a box body having an inner cavity, the box body is provided with a refrigerant inlet, a steam outlet, a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is communicated with the liquid refrigerant outlet and the inner cavity of the condenser 40, the steam outlet is communicated with the absorbent solution cavity of the absorber, the first heat exchange pipe is located inside the box body, and two ends of the first heat exchange pipe are communicated with corresponding external refrigerant pipelines through the refrigerant inlet and the refrigerant outlet.

In the above embodiment, the high-temperature and high-pressure refrigerant flowing out of the discharge port of the compressor 2 directly flows into the first heat exchange pipeline inside the coupled evaporator 20 to directly contact with the refrigerant inside the box body for heat exchange, so that the heat exchange efficiency is greatly improved.

The structure of the coupled evaporator 20 can be various, and the coupled evaporator can be integrated with the absorber for supplying refrigerant vapor, i.e. both are arranged inside the same shell 1-2, for example, fig. 3 and 4, the inner space of the shell 1-2 forms the absorber and the coupled evaporator through a partition, and the vapor outlet is positioned on the corresponding partition. Of course, the coupled evaporator and the absorber may be separate structures, and they are surrounded by separate shells, and the communication is realized through pipelines, for example, fig. 1, fig. 2, fig. 5 and fig. 6.

The detailed description of the specific structure of the coupled evaporator is omitted, and it is obvious to those skilled in the art from the description herein that the integrated structure and the separate split structure described herein can be understood and realized.

Similarly, the generator 30 and the condenser 40 may be an integrated structure or a separate structure. For example, fig. 3 and 4 show embodiments in which the generator 30 and the condenser 40 are located inside the same drum 3-4.

In the above embodiments, the absorption module 1 is a single-stage module, and the number of the generator, the condenser 40, the absorber 10 and the coupled evaporator 20 is one in fig. 1, 3 and 5. The connection relationship between the devices is not described in detail herein.

Of course, the number of the absorbers and the coupled evaporators is N, where N is greater than or equal to 2, one absorber corresponds to one coupled evaporator, and the generator 30, the condenser 40, all absorbers and all coupled evaporators form an N-stage absorption module 1. For example, for a two-stage absorption module, two absorbers are included, which are respectively defined as a first absorber 11 and a second absorber 12, and two coupled evaporators can be defined as a first coupled evaporator 21 and a second coupled evaporator 22, wherein the first coupled evaporator 21 provides refrigerant vapor to the first absorber 11, and the second coupled evaporator 22 provides refrigerant vapor to the second absorber 12.

The compressor 2 discharge may be in communication with one or more of the two coupled evaporators. I.e. the first heat exchange tubes inside at least one or several coupled evaporators are connected in series or in parallel or in series and parallel between said compressor 2 and throttling member 5.

Fig. 4 shows an embodiment with two absorbers and two coupled evaporators, the first heat exchange channels of the two coupled evaporators being connected in parallel.

The number of generators and condensers 40 may be one, or two or more.

As shown in fig. 2 and 6, in another embodiment, the generator may include at least one high temperature generator 31 and one low temperature generator 32, and the number of the absorber and the coupled evaporator is one (shown in fig. 6) or N; wherein N is more than or equal to 2, one absorber corresponds to one coupled evaporator, and the generator, the condenser 40, all absorbers and all coupled evaporators form an N-stage absorption module 1; the first heat exchange tubes of at least one or several coupled evaporators are connected in series or in parallel or in series and parallel between the compressor 2 and the throttling member 5.

Wherein fig. 2 and 6 show an embodiment comprising a high temperature generator 31, a low temperature generator 32, an absorber 10 and a coupled evaporator 20.

As mentioned above, the liquid refrigerant in the condenser 40 can flow into the coupled evaporator to form refrigerant vapor, and the liquid refrigerant in the condenser 40 can flow into the coupled evaporator by properly positioning the two positions, so that the liquid refrigerant in the condenser 40 flows into the coupled evaporator under the gravity action, or the coupled evaporator can pump the liquid refrigerant in the condenser 40 by a pump or the like.

Furthermore, the coupled heat pump unit can be further provided with a pumping circulation pipeline for pumping the liquid refrigerant in the inner cavity of the box body to the top of the inner cavity so as to exchange heat between the liquid refrigerant and the refrigerant in the first heat exchange channel. Namely, the liquid refrigerant in the inner cavity of the coupled evaporator can form a circulating flow path by pumping the circulating pipeline. The pumping circuit is shown in fig. 3 and includes a pump 18. Of course, the circulation of the solution may also be provided with a first solution pump 15 and a second solution pump 19 to provide circulation power for the respective lines.

In the above embodiments, the heat exchange tubes inside the absorber and the cooling water tubes inside the condenser 40 are connected in series or in parallel or in series and parallel. According to the environmental use requirement, the external cooling water (or hot water) can sequentially flow through the absorber and the condenser 40 to be heated, and can also respectively flow through the absorber 10 and the condenser 40, and for the condition of a plurality of absorbers and condensers 40, the external cooling water (or hot water) can also flow through the absorbers and the condensers 40 in a series-parallel connection mode, so that the unit has higher use flexibility, and meets the temperature supply requirements of different occasions.

For the compression module, the compressor 2 may be a single-stage compressor or a two-stage compressor.

For the two-stage compressor, the compression module further comprises an economizer 7, the economizer 7 is located at the downstream of the outlet of the first heat exchange pipeline of the coupled evaporator 20, the throttling component 5 is located between the economizer 7 and the refrigerant inlet of the evaporator, and the compressor 2, the first heat exchange pipeline inside the coupled evaporator, the economizer 7, the throttling component 5 and the evaporator 3 are sequentially communicated to form a refrigerant main circulation loop. An inlet of the dual-purpose branch pipeline 2b is connected with an inlet of the economizer 7 and a first heat exchange pipeline communication pipeline, and an outlet of the dual-purpose branch pipeline 2b is connected with a pipeline at the downstream of the throttling part 5, such as a refrigerant inlet of the evaporator 3.

The specific construction of the economizer 7 is not limited herein and reference is made to the prior art.

The auxiliary switch valves 6 in the above embodiments may be all adjustable valves, and may be manual valves, or valves with automatically adjusted opening, such as adjustable electric control valves.

The driving heat source of the generator can be hot water, steam or flue gas, and the requirement can be met.

In the above embodiments, a heat exchanger 202 may be further disposed on the solution circulation loop for exchanging heat between the low-temperature solution and the high-temperature solution.

In addition, in the above embodiments, the medium for exchanging heat with the refrigerant in the evaporator 3 may be cold water or residual heat water from the outside.

It is right above the utility model provides a manifold type heat pump set has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (13)

1. A coupled heat pump unit is characterized by comprising an absorption module and a compression module, wherein the absorption module at least comprises a generator (30), a condenser (40), an absorber (10) and a coupled evaporator (20), the generator (30) and the absorber (10) can form an absorbent solution circulation loop, and the condenser (40) is used for condensing refrigerant steam generated by the generator (30); the compression module at least comprises a compressor (2), a throttling part (5) and an evaporator (3); the compressor (2), a first heat exchange pipeline inside the coupled evaporator (20), the throttling component (5) and the evaporator (3) are communicated in sequence through pipelines to form a refrigerant main circulation loop; when the heat exchanger works, at least part of high-temperature refrigerant discharged by the compressor (2) can heat refrigerant in the coupled evaporator (20) when flowing through the first heat exchange pipeline so as to prepare steam required by the absorber;

the heat exchanger also comprises a dual-purpose branch pipeline (2b) which is connected with the throttling component (5) in parallel, wherein the inlet of the dual-purpose branch pipeline (2b) can be communicated with the outlet of the first heat exchange pipeline, the outlet of the dual-purpose branch pipeline is communicated with the refrigerant inlet of the evaporator (3), and an auxiliary switch valve (6) is arranged on the dual-purpose branch pipeline (2b) and used for controlling the opening degree of the dual-purpose branch pipeline (2 b).

2. The coupled heat pump unit as claimed in claim 1, wherein the coupled evaporator (20) comprises a box body having an inner cavity, the box body is provided with a refrigerant inlet, a steam outlet, a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is communicated with the liquid refrigerant outlet of the condenser (40) and the inner cavity, the steam outlet is communicated with the absorbent solution cavity of the absorber, the first heat exchange pipeline is located inside the box body, and two ends of the first heat exchange pipeline are communicated with external corresponding refrigerant pipelines through the refrigerant inlet and the refrigerant outlet.

3. The coupled heat pump unit according to claim 2, wherein the number of the coupled evaporators is two or more, the absorbers are in one-to-one correspondence with the coupled evaporators, and the first heat exchange pipes in each coupled evaporator are connected in series or in parallel or in series and parallel between the compressor (2) and the throttling component (5).

4. The coupled heat pump unit according to claim 2, wherein the absorption module is a single-stage module, and the number of the generator (30), the condenser (40), the absorber (10) and the coupled evaporator (20) is one;

alternatively, the first and second electrodes may be,

the number of the generators (30) and the number of the condensers (40) are both one, the number of the absorbers and the number of the coupled evaporators are both N, wherein N is more than or equal to 2, one absorber corresponds to one coupled evaporator, and the generators, the condensers (40), all absorbers and all coupled evaporators form N-stage absorption modules; at least one or several first heat exchange pipes inside the coupled evaporator are connected in series or in parallel or in series and parallel between the compressor (2) and the throttling part (5).

5. The coupled heat pump unit of claim 2, wherein the generator comprises at least one high temperature generator (31) and one low temperature generator (32), and the number of the absorber and the coupled evaporator is one or N;

wherein N is greater than or equal to 2, one absorber corresponds to one coupled evaporator, and the generator, the condenser (40), all absorbers and all coupled evaporators form an N-stage absorption module; at least one or several of the first heat exchange tubes of the coupled evaporator are connected in series or in parallel or in series and parallel between the compressor (2) and a throttling member.

6. The coupled heat pump unit as claimed in claim 2, further comprising a pumping circulation line for pumping the liquid refrigerant in the inner cavity to the top of the inner cavity so that the liquid refrigerant exchanges heat with the refrigerant inside the first heat exchange channel.

7. A coupled heat pump unit according to any one of claims 2 to 6, wherein the absorber and the coupled evaporator are of an integral structure, the integral structure comprises a shell (1-2), the inner space of the shell (1-2) forms the absorber and the coupled evaporator through a partition, and the steam outlet is positioned on the corresponding partition; or the absorber and the coupled evaporator are in a split type independent structure;

or/and the first and/or second light-emitting diodes are arranged in the light-emitting diode,

the generator and the condenser (40) are of an integrated structure or a split type independent structure.

8. A coupled heat pump unit according to any of claims 1 to 6, wherein the heat exchange tubes inside the absorber and the cooling water tubes inside the condenser (40) are connected in series or in parallel or in series and parallel;

or/and the generator is a hot water driven generator, a steam driven generator or a flue gas driven generator.

9. The coupled heat pump unit according to any one of claims 1 to 6, wherein the compressor (2) is a single-stage compressor; or the compressor (2) is a two-stage compressor, the compression module further comprises an economizer (7), the economizer (7) is positioned at the downstream of the outlet of the first heat exchange pipeline of the coupled evaporator, the throttling component is positioned between the economizer (7) and the refrigerant inlet of the evaporator, and the compressor (2), the first heat exchange pipeline inside the coupled evaporator, the economizer (7), the throttling component (5) and the evaporator (3) are sequentially communicated to form a refrigerant main circulation loop; the inlet of the branch pipeline (2b) is connected with the inlet of the economizer and the first heat exchange pipeline communication pipeline, and the outlet of the branch pipeline (2b) is connected with the downstream pipeline of the throttling component (5).

10. A coupled heat pump unit as claimed in any one of claims 1 to 6, wherein the auxiliary switch valve is an adjustable electrically controlled valve.

11. The coupled heat pump unit as claimed in claim 7, wherein the auxiliary switch valve is an adjustable electrically controlled valve.

12. The coupled heat pump unit as claimed in claim 8, wherein the auxiliary switch valve is an adjustable electrically controlled valve.

13. The coupled heat pump unit as claimed in claim 9, wherein the auxiliary switch valve is an adjustable electrically controlled valve.

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