Dehumidification system and air conditioning system

Abstract

The present invention relates to a dehumidification system and an air conditioning system, wherein the dehumidification system comprises a multi-stage dehumidification subsystem and a plurality of mutually coupled heat pump subsystems; the multi-stage dehumidification subsystems correspond to the plurality of heat pump subsystems one-to-one; each heat pump subsystem provides heat and cold for the corresponding dehumidification subsystem. The coupling between the plurality of heat pump subsystems solves the mismatch problem between the cold and heat amount on the dehumidification side and the generation side in the dehumidification subsystem, makes full use of the cold and heat amount, and realizes the cascade utilization of energy; by matching the cold and heat amount at different temperatures with the corresponding dehumidifiers and regenerators of different concentrations, energy consumption can be effectively reduced and energy can be saved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, ventilation and air conditioning, and in particular to a dehumidification system and an air conditioning system. Background Art

[0002] The temperature and humidity independent control air conditioning system can separate the indoor temperature and humidity control into two independent system controls, avoiding the traditional condensing air conditioning system using a low-temperature cold source below the air dew point temperature for dehumidification and cooling. In order to achieve the indoor design air supply temperature, the air after cooling and dehumidification needs to be reheated, resulting in energy quality waste and high energy consumption. As a humidity control system, solid dehumidification technology has problems such as high regeneration temperature requirements and difficulty in regeneration of solid desiccant, so the application of solution dehumidification technology is becoming more and more extensive. Since the solution releases heat when absorbing water vapor, the released heat causes the solution temperature to rise. As the solution temperature rises, the hygroscopic performance of the solution decreases significantly. By setting up a heat pump cycle, the cold capacity of the evaporator is used to reduce the solution temperature and enhance the hygroscopic performance of the solution, and the heat of the condenser is used for the concentration and regeneration of the hygroscopic solution. Therefore, the heat pump can provide cold and heat for the solution dehumidification system at the same time, realizing full utilization of energy. However, the condensation heat of the heat pump system is often larger than the evaporation heat, and this mismatch between cold and heat will affect the performance of the unit.

[0003] Therefore, it is necessary to provide a dehumidification system and an air conditioning system to solve the deficiencies of the prior art. Summary of the invention

[0004] In order to solve the problems in the prior art, the present invention provides a dehumidification system and an air conditioning system.

[0005] A dehumidification system comprises a multi-stage dehumidification subsystem and a plurality of mutually coupled heat pump subsystems;

[0006] The multiple levels of dehumidification subsystems correspond one to one with the multiple heat pump subsystems;

[0007] Each of the heat pump subsystems provides heat and cold to the corresponding dehumidification subsystem.

[0008] Further, it includes a primary dehumidification subsystem, a secondary dehumidification subsystem, a main heat pump subsystem and a secondary heat pump subsystem;

[0009] The auxiliary heat pump subsystem is driven by using the heat provided by the main heat pump subsystem;

[0010] The primary dehumidification subsystem includes a primary dehumidifier and a primary regenerator, and the secondary dehumidification subsystem includes a secondary dehumidifier and a secondary regenerator;

[0011] The main heat pump subsystem and the secondary dehumidification subsystem meet at the secondary dehumidifier, and heat exchange can be performed in the secondary dehumidifier; the main heat pump subsystem and the secondary dehumidification subsystem meet at the secondary regenerator, and heat exchange can be performed in the secondary regenerator; the auxiliary heat pump subsystem and the primary dehumidification subsystem meet at the primary dehumidifier, and heat exchange can be performed in the primary dehumidifier; the auxiliary heat pump subsystem and the primary dehumidification subsystem meet at the primary regenerator, and heat exchange can be performed in the primary regenerator.

[0012] Furthermore, the main heat pump subsystem includes a compression heat pump subsystem or a thermoelectric heat pump subsystem; the auxiliary heat pump subsystem includes an adsorption heat pump subsystem or an absorption heat pump subsystem.

[0013] Furthermore, the main heat pump subsystem is a compression heat pump subsystem, and the auxiliary heat pump subsystem is an absorption heat pump subsystem;

[0014] The compression heat pump subsystem includes a first condenser, and the absorption heat pump subsystem includes a heat generating exchanger. The first condenser and the heat generating exchanger are connected via a heat exchange element and can perform heat exchange.

[0015] Furthermore, the primary dehumidification subsystem and the secondary dehumidification subsystem are both semi-permeable membrane dehumidification subsystems;

[0016] The concentration of the solution in the primary dehumidification subsystem is greater than the concentration of the solution in the secondary dehumidification subsystem.

[0017] Furthermore, the primary dehumidification subsystem further includes a primary driving member; the primary dehumidifier is provided with a primary dehumidification solution channel, and the primary regenerator is provided with a primary regeneration solution channel;

[0018] The outlet of the primary dehumidification solution channel is connected to the inlet of the primary regeneration solution channel through a pipeline, and the outlet of the primary regeneration solution channel is connected to the inlet of the primary dehumidification solution channel through a pipeline. The primary driving component is arranged on the pipeline between the primary dehumidification solution channel and the primary regeneration solution channel.

[0019] Furthermore, the primary dehumidification subsystem further includes a first self-circulation driving member and a second self-circulation driving member;

[0020] The outlet and inlet of the primary dehumidification solution channel are connected to the first self-circulation driving member through a pipeline; the outlet and inlet of the primary regeneration solution channel are connected to the second self-circulation driving member through a pipeline.

[0021] Furthermore, the secondary dehumidification subsystem further includes a secondary driving member; the secondary dehumidifier is provided with a secondary dehumidification solution channel, and the secondary regenerator is provided with a secondary regeneration solution channel;

[0022] The outlet of the secondary dehumidification solution channel is connected to the inlet of the secondary regeneration solution channel through a pipeline, and the outlet of the secondary regeneration solution channel is connected to the inlet of the secondary dehumidification solution channel through a pipeline. The secondary driving component is arranged on the pipeline between the secondary dehumidification solution channel and the secondary regeneration solution channel.

[0023] Furthermore, the secondary dehumidification subsystem further includes a third self-circulation driving member and a fourth self-circulation driving member;

[0024] The outlet and inlet of the secondary dehumidification solution channel are connected to the third self-circulation driving member through a pipeline; the outlet and inlet of the secondary regeneration solution channel are connected to the fourth self-circulation driving member through a pipeline.

[0025] Furthermore, the compression heat pump subsystem further includes a compressor, a solenoid valve, and a throttle valve; the secondary dehumidifier is provided with a secondary dehumidification refrigerant channel, and the secondary regenerator is provided with a secondary regeneration refrigerant channel;

[0026] The exhaust port of the compressor is respectively connected to the inlet of the first condenser and the inlet of the secondary regeneration refrigerant channel, the outlet of the first condenser and the outlet of the secondary regeneration refrigerant channel are respectively connected to one end of the connecting pipeline, the other end of the connecting pipeline is connected to the inlet of the secondary dehumidification refrigerant channel, and the outlet of the secondary dehumidification refrigerant channel is connected to the suction port of the compressor;

[0027] The solenoid valve is arranged on the pipeline between the exhaust port of the compressor and the inlet of the secondary regeneration refrigerant channel, and the throttle valve is arranged on the connecting pipeline.

[0028] Furthermore, the absorption heat pump subsystem also includes a generator, an absorber, a second condenser, a second evaporator, an absorption heat exchanger, a condensation heat exchanger, an evaporative condenser and a solution heat exchanger; the primary dehumidifier is provided with a primary dehumidification refrigerant channel, and the primary regenerator is provided with a primary regeneration refrigerant channel;

[0029] The generating heat exchanger is arranged in the generator and the two can exchange heat, the absorbing heat exchanger is arranged in the absorber and the two can exchange heat, the condensing heat exchanger is arranged in the second condenser and the two can exchange heat, and the evaporating heat exchanger is arranged in the second evaporator and the two can exchange heat;

[0030] The outlet of the evaporative heat exchanger is connected to the inlet of the primary dehumidification refrigerant channel through a pipeline, the outlet of the primary dehumidification refrigerant channel is connected to the inlet of the evaporative heat exchanger through a pipeline, and a dehumidification drive component is provided on the pipeline between the primary dehumidification refrigerant channel and the evaporative heat exchanger;

[0031] The outlet of the absorption heat exchanger is connected to the inlet of the condensing heat exchanger through a pipeline, the outlet of the condensing heat exchanger is connected to the inlet of the primary regenerative refrigerant channel through a pipeline, the outlet of the primary regenerative refrigerant channel is connected to the inlet of the absorption heat exchanger through a pipeline, and a regenerative drive component is provided on the pipeline between the absorption heat exchanger and the condensing heat exchanger, on the pipeline between the condensing heat exchanger and the primary regenerative refrigerant channel, or on the pipeline between the primary regenerative refrigerant channel and the absorption heat exchanger;

[0032] The generator, the second condenser, the second evaporator and the absorber are connected in sequence, and the generator and the absorber are connected in two-way communication through the solution heat exchanger; a solution driving component is provided on the pipeline between the generator and the absorber.

[0033] Furthermore, the absorption heat pump subsystem also includes a cold water radiation terminal coil; the outlet of the first-level dehumidification refrigerant channel is connected to the inlet of the cold water radiation terminal coil, and the outlet of the cold water radiation terminal coil is connected to the inlet of the evaporative heat exchanger; a refrigeration drive component is provided on the pipeline between the cold water radiation terminal coil and the evaporative heat exchanger.

[0034] Furthermore, the heat exchange element is a heat exchange box, the heat exchange box and the heat generating exchanger are bidirectionally connected through a pipeline, and a heat exchange driving element is provided on the pipeline between the heat exchange box and the heat generating exchanger.

[0035] Furthermore, it also includes a thermal supplementary component with a self-heating function, the inlet of the thermal supplementary component is connected to a pipeline between the heat exchange box and the heat generating heat exchanger, and the outlet of the thermal supplementary component is connected to another pipeline between the heat exchange box and the heat generating heat exchanger; a supplementary driving component is provided on the pipeline between the thermal supplementary component and the pipeline between the heat exchange box and the heat generating heat exchanger.

[0036] Furthermore, the heat supplement component may be an electric water heater or a solar water heater.

[0037] Based on the same inventive concept, the present invention also provides an air conditioning system, including the dehumidification system.

[0038] The technical solution of the present invention has the following advantages compared with the closest prior art:

[0039] The dehumidification system provided by the technical solution provided by the present invention can perform gradient dehumidification and repeated dehumidification by setting up a multi-stage dehumidification subsystem for dehumidification. After the dehumidification effects of the multi-stage dehumidification subsystems are superimposed, the dehumidification rate can be improved, the dehumidification effect can be enhanced, and the thoroughness of dehumidification can be achieved; and multiple mutually coupled heat pump subsystems correspond one-to-one to the multi-stage dehumidification subsystems respectively, and the heat pump subsystem provides cold and heat to the corresponding dehumidification subsystems, and the dehumidification subsystem uses the cold to neutralize the heat generated by its moisture absorption to maintain its moisture absorption capacity, and the dehumidification subsystem uses heat regeneration to ensure the continuous operation of the dehumidification subsystem; the coupling between multiple heat pump subsystems solves the mismatch problem between the cold and heat on the dehumidification side and the generation side in the dehumidification subsystem, makes full use of the cold and heat, and realizes the step-by-step utilization of energy; by matching the cold and heat at different temperatures with the corresponding dehumidifiers and regenerators of different concentrations, energy consumption can be effectively reduced and energy can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the dehumidification system provided by the present invention.

[0041] Among them, 1-cold water radiation terminal coil; 2-third self-circulation drive; 3-secondary dehumidifier; 4-compressor; 5-primary drive; 6-first self-circulation drive; 7-primary dehumidifier; 8-refrigeration drive; 9-second self-circulation drive; 10-primary regenerator; 11-second condenser; 12-second evaporator; 13-absorber; 14-regeneration drive; 15-generator; 16-solution heat exchanger; 17-solution drive; 18-heat exchange drive; 19-supplementary drive; 20-heat supplement; 21-first condenser; 22-solenoid valve; 23-secondary regenerator; 24-throttle valve; 25-fourth self-circulation drive; 26-secondary drive; 27-heat exchange; 28-condensation heat exchanger; 29-evaporation heat exchanger; 30-absorption heat exchanger; 31-generation heat exchanger. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] In the present application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0045] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0046] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figure 1 The present application is described in detail with reference to embodiments. Figure 1 It is a structural schematic diagram of the dehumidification system provided by the present invention.

[0048] The present invention provides a dehumidification system, comprising a multi-stage dehumidification subsystem and a plurality of mutually coupled heat pump subsystems; the multi-stage dehumidification subsystems correspond one to one with the plurality of heat pump subsystems; each of the heat pump subsystems provides heat and cooling for the corresponding dehumidification subsystem.

[0049] By setting up a multi-stage dehumidification subsystem for dehumidification, gradient dehumidification and repeated dehumidification can be performed. After the dehumidification effects of the multi-stage dehumidification subsystems are superimposed, the dehumidification rate can be increased, the dehumidification effect can be enhanced, and the thoroughness of dehumidification can be achieved; and multiple mutually coupled heat pump subsystems correspond to the multi-stage dehumidification subsystems one by one, respectively. The heat pump subsystem provides cold and heat for the corresponding dehumidification subsystem, and the dehumidification subsystem uses the cold to neutralize the heat generated by its moisture absorption to maintain its moisture absorption capacity, and the dehumidification subsystem uses heat regeneration to ensure the continuous operation of the dehumidification subsystem; the coupling between multiple heat pump subsystems solves the mismatch problem between the cold and heat on the dehumidification side and the generation side in the dehumidification subsystem, makes full use of the cold and heat, and realizes the cascade utilization of energy; by matching the cold and heat at different temperatures with the corresponding dehumidifiers and regenerators of different concentrations, energy consumption can be effectively reduced and energy can be saved.

[0050] In some embodiments of the present invention, a primary dehumidification subsystem, a secondary dehumidification subsystem, a main heat pump subsystem and an auxiliary heat pump subsystem are included; the auxiliary heat pump subsystem is driven by the heat provided by the main heat pump subsystem; the primary dehumidification subsystem includes a primary dehumidifier 7 and a primary regenerator 10, and the secondary dehumidification subsystem includes a secondary dehumidifier 3 and a secondary regenerator 23; the main heat pump subsystem and the secondary dehumidification subsystem meet at the secondary dehumidifier 3, and heat exchange can be performed in the secondary dehumidifier 3; the main heat pump subsystem and the secondary dehumidification subsystem meet at the secondary regenerator 23, and heat exchange can be performed in the secondary regenerator 23; the auxiliary heat pump subsystem and the primary dehumidification subsystem meet at the primary dehumidifier 7, and heat exchange can be performed in the primary dehumidifier 7; the auxiliary heat pump subsystem and the primary dehumidification subsystem meet at the primary regenerator 10, and heat exchange can be performed in the primary regenerator 10.

[0051] A two-stage solution dehumidification subsystem is used. The first-stage dehumidification subsystem uses a low-concentration dehumidification solution, and the second-stage solution dehumidification subsystem uses a high-concentration dehumidification solution. The higher the concentration of the dehumidification solution, the more heat is generated by absorbing water vapor and the more energy is required for solution regeneration. Therefore, the first-stage dehumidification subsystem requires a cold source with less coldness to take away the additional heat generated by the solution absorbing moisture to ensure that the solution's dehumidification capacity is not attenuated, and a heat source with less heat is required to regenerate the dehumidification solution to ensure the continuous operation of the solution dehumidification system. Therefore, the second-stage solution dehumidification subsystem requires a cold source with a larger coldness to take away the additional heat generated by the solution absorbing moisture to ensure that the solution's dehumidification capacity is not attenuated, and a heat source with a larger heat is required to regenerate the dehumidification solution to ensure the continuous operation of the solution dehumidification system. The main heat pump subsystem and the auxiliary heat pump subsystem used in the present application are coupled with each other. The main heat pump subsystem uses its preheating to drive the auxiliary heat pump subsystem. The condensation heat of the main heat pump subsystem has a high grade. A part of the condensation heat provides regeneration heat to the regenerator of the secondary dehumidification subsystem, and the other part of the condensation heat provides heat to the auxiliary heat pump subsystem. The medium-grade heat of the auxiliary heat pump subsystem is used for solution regeneration of the primary dehumidification subsystem, and the cold capacity is used to maintain the moisture absorption capacity of the primary dehumidification subsystem.

[0052] In some embodiments of the present invention, the main heat pump subsystem includes a compression heat pump subsystem or a thermoelectric heat pump subsystem; the auxiliary heat pump subsystem includes an adsorption heat pump subsystem or an absorption heat pump subsystem. The main heat pump subsystem selects a heat pump system that provides a higher amount of cold and heat, and the auxiliary heat pump subsystem selects a heat pump system that provides a lower amount of cold and heat. The auxiliary heat pump selects a heat pump system that can be driven by the waste heat of the main heat pump, which facilitates the coupling between the two heat pump subsystems and the distribution of cold and heat in the overall dehumidification system.

[0053] In some embodiments of the present invention, the main heat pump subsystem is a compression heat pump subsystem, and the auxiliary heat pump subsystem is an absorption heat pump subsystem; the compression heat pump subsystem includes a first condenser 21, and the absorption heat pump subsystem includes a heat exchanger 31, and the first condenser 21 and the heat exchanger 31 are connected through a heat exchange element 27 and can exchange heat. The compression heat pump subsystem operates relatively stably, and the cold and heat provided are large and stable. The absorption heat pump subsystem can be driven by waste heat, and can generate cold and heat to meet the cold and heat requirements of the primary dehumidification subsystem; the first condenser 21 and the heat exchanger 31 exchange heat through the heat exchange element 27, which can realize the coupling of the two heat pump subsystems, that is, the absorption heat pump subsystem can be driven by the waste heat of the compression heat pump subsystem. The compression heat pump subsystem is preferably a carbon dioxide transcritical heat pump system.

[0054] In some embodiments of the present invention, the primary dehumidification subsystem and the secondary dehumidification subsystem are both semi-permeable membrane solution dehumidification subsystems; the concentration of the solution in the primary dehumidification subsystem is less than the concentration of the solution in the secondary dehumidification subsystem. The primary dehumidification subsystem uses a low-concentration dehumidification solution, and the secondary solution dehumidification subsystem uses a high-concentration dehumidification solution. Since the higher the concentration of the dehumidification solution, the more heat generated by absorbing water vapor and the more energy required for solution regeneration. Therefore, the primary dehumidification subsystem requires a cold source with less coldness to take away the additional heat generated by the solution absorbing moisture to ensure that the solution dehumidification capacity does not decay, and a heat source with less heat is required to regenerate the dehumidification solution to ensure the continuous operation of the solution dehumidification system. Therefore, the secondary solution dehumidification subsystem requires a cold source with a larger coldness to take away the additional heat generated by the solution absorbing moisture to ensure that the solution dehumidification capacity does not decay, and a heat source with a larger heat is required to regenerate the dehumidification solution to ensure the continuous operation of the solution dehumidification system. The solutions in the primary dehumidification subsystem and the secondary dehumidification subsystem are preferably lithium bromide solutions.

[0055] In some embodiments of the present invention, the primary dehumidification subsystem also includes a primary driving component 5; the primary dehumidifier 7 is provided with a primary dehumidification solution channel, and the primary regenerator 10 is provided with a primary regeneration solution channel; the outlet of the primary dehumidification solution channel is connected to the inlet of the primary regeneration solution channel through a pipeline, and the outlet of the primary regeneration solution channel is connected to the inlet of the primary dehumidification solution channel through a pipeline, and the primary driving component 5 is arranged on the pipeline between the primary dehumidification solution channel and the primary regeneration solution channel.

[0056] In some embodiments of the present invention, the primary dehumidification subsystem also includes a first self-circulating driving component 6 and a second self-circulating driving component 9; the outlet and inlet of the primary dehumidification solution channel are connected to the first self-circulating driving component 6 through a pipeline; the outlet and inlet of the primary regeneration solution channel are connected to the second self-circulating driving component 9 through a pipeline.

[0057] In the primary dehumidification subsystem, the outlet of the first self-circulation driving component 6 is connected to the inlet of the primary dehumidification solution channel of the primary dehumidifier 7, and the outlet of the primary dehumidification solution channel is divided into two paths, one of which is connected to the inlet of the first self-circulation driving component 6 to realize the self-circulation of the solution; the other is connected to the inlet of the primary regeneration solution channel of the primary regenerator 10, and the outlet of the second self-circulation driving component 9 is also connected to the inlet of the primary regeneration solution channel. The outlet of the primary regeneration solution channel is divided into two paths, one of which is connected to the inlet of the second self-circulation driving component 9 to realize the self-circulation of the solution; the other is connected to the inlet of the primary driving component 5, and the outlet of the primary driving component 5 and the outlet of the first self-circulation driving component 6 are jointly connected to the inlet of the primary dehumidification solution channel of the primary dehumidifier 7 to realize a complete dilute solution circulation. The first-stage dehumidifier 7 and the first-stage regenerator 10 are both semipermeable membrane heat and mass transfer containers, and the semipermeable membrane contains a heat exchange copper tube. A first-stage dehumidification solution channel is formed between the semipermeable membrane of the first-stage dehumidifier 7 and the heat exchange copper tube, and a first-stage regeneration solution channel is formed between the semipermeable membrane of the first-stage regenerator 10 and the heat exchange copper tube; air flows outside the semipermeable membrane, and since the semipermeable membrane only allows water molecules to pass through, the air is isolated from direct contact with the solution without affecting the dehumidification and regeneration performance of the solution. A first-stage dehumidification refrigerant channel is formed in the heat exchange copper tube of the first-stage dehumidifier 7, and a first-stage regeneration refrigerant channel is formed in the heat exchange copper tube of the first-stage regenerator 10. The first-stage dehumidification refrigerant channel and the first-stage regeneration refrigerant channel are used to circulate refrigerant, that is, to circulate liquid water of the absorption heat pump subsystem. The refrigerant in the first-stage dehumidification refrigerant channel and the solution in the first-stage dehumidification solution channel can exchange heat, and the refrigerant in the first-stage regeneration refrigerant channel and the solution in the first-stage regeneration solution channel can exchange heat. This will be described in detail when introducing the absorption heat pump subsystem below, and will not be repeated here.

[0058] In some embodiments of the present invention, the secondary dehumidification subsystem also includes a secondary driving component 26; the secondary dehumidifier 3 is provided with a secondary dehumidification solution channel, and the secondary regenerator 23 is provided with a secondary regeneration solution channel; the outlet of the secondary dehumidification solution channel is connected to the inlet of the secondary regeneration solution channel through a pipeline, and the outlet of the secondary regeneration solution channel is connected to the inlet of the secondary dehumidification solution channel through a pipeline, and the secondary driving component 26 is arranged on the pipeline between the secondary dehumidification solution channel and the secondary regeneration solution channel.

[0059] In some embodiments of the present invention, the secondary dehumidification subsystem also includes a third self-circulating drive 2 and a fourth self-circulating drive 25; the outlet and inlet of the secondary dehumidification solution channel are connected to the third self-circulating drive 2 through a pipeline; the outlet and inlet of the secondary regeneration solution channel are connected to the fourth self-circulating drive 25 through a pipeline.

[0060] In the secondary dehumidification subsystem, the outlet of the third self-circulation driving component 2 is connected to the inlet of the secondary dehumidification solution channel of the secondary dehumidifier 3, and the outlet of the secondary dehumidification solution channel is divided into two paths, one of which is connected to the inlet of the third self-circulation driving component 2 to realize the self-circulation of the solution; the other is connected to the inlet of the secondary regeneration solution channel of the secondary regenerator 23, and the outlet of the fourth self-circulation driving component 25 is also connected to the inlet of the secondary regeneration solution channel. The outlet of the secondary regeneration solution channel is divided into two paths, one of which is connected to the inlet of the fourth self-circulation driving component 25 to realize the self-circulation of the solution; the other is connected to the inlet of the secondary driving component 26, and the outlet of the secondary driving component 26 and the outlet of the third self-circulation driving component 2 are jointly connected to the inlet of the secondary dehumidification solution channel of the secondary dehumidifier 3 to realize a complete dilute solution circulation. The secondary dehumidifier 3 and the secondary regenerator 23 are both semipermeable membrane heat and mass transfer containers, and the semipermeable membrane contains a heat exchange copper tube. A secondary dehumidification solution channel is formed between the semipermeable membrane of the secondary dehumidifier 3 and the heat exchange copper tube, and a secondary regeneration solution channel is formed between the semipermeable membrane of the secondary regenerator 23 and the heat exchange copper tube; air flows outside the semipermeable membrane. Since the semipermeable membrane only allows water molecules to pass through, the air is isolated from direct contact with the solution without affecting the dehumidification and regeneration performance of the solution. A secondary dehumidification refrigerant channel is formed in the heat exchange copper tube of the secondary dehumidifier 3, and a secondary regeneration refrigerant channel is formed in the heat exchange copper tube of the secondary regenerator 23. The secondary dehumidification refrigerant channel and the secondary regeneration refrigerant channel are used to circulate refrigerant, that is, to circulate liquid water of the absorption heat pump subsystem. The refrigerant in the secondary dehumidification refrigerant channel and the solution in the secondary dehumidification solution channel can exchange heat, and the refrigerant in the secondary regeneration refrigerant channel and the solution in the secondary regeneration solution channel can exchange heat. This will be described in detail when introducing the absorption heat pump subsystem below, and will not be repeated here.

[0061] In some embodiments of the present invention, the compression heat pump subsystem also includes a compressor 4, a solenoid valve 22, and a throttle valve 24; the secondary dehumidifier 3 is provided with a secondary dehumidification refrigerant channel, and the secondary regenerator 23 is provided with a secondary regeneration refrigerant channel; the exhaust port of the compressor 4 is respectively connected to the inlet of the first condenser 21 and the inlet of the secondary regeneration refrigerant channel, and the outlet of the first condenser 21 and the outlet of the secondary regeneration refrigerant channel are respectively connected to one end of the connecting pipeline, and the other end of the connecting pipeline is connected to the inlet of the secondary dehumidification refrigerant channel, and the outlet of the secondary dehumidification refrigerant channel is connected to the intake port of the compressor 4; the solenoid valve 22 is arranged on the pipeline between the exhaust port of the compressor 4 and the inlet of the secondary regeneration refrigerant channel, and the throttle valve 24 is arranged on the connecting pipeline. The compression heat pump subsystem passes through the secondary dehumidifier 3 and the secondary regenerator 23 respectively. The heat exchange copper tubes forming the secondary regeneration refrigerant channel in the secondary regenerator 23 serve as the condenser of the compression heat pump subsystem to release heat, and the heat exchange copper tubes forming the secondary dehumidification refrigerant channel in the secondary dehumidifier 3 serve as the evaporator of the compression heat pump subsystem to absorb heat; at the same time, the first condenser 21 also serves as a condenser, which is connected in parallel with the secondary regenerator 23. The high-temperature and high-pressure gas compressed by the compressor 4 is diverted to the two condensers. The heat in the first condenser 21 is transferred to the absorption heat pump subsystem through the heat exchange element 27 as waste heat, and drives it, thereby realizing the coupling between the two heat pump subsystems; the compression heat pump subsystem preferably has a carbon dioxide transcritical heat pump system.

[0062] In some embodiments of the present invention, the absorption heat pump subsystem also includes a generator 15, an absorber 13, a second condenser 11, a second evaporator 12, an absorption heat exchanger 30, a condensation heat exchanger 28, an evaporative condenser and a solution heat exchanger 16; the first-level dehumidifier 7 is provided with a first-level dehumidification refrigerant channel, and the first-level regenerator 10 is provided with a first-level regeneration refrigerant channel; the generator heat exchanger 31 is arranged in the generator 15 and the two can exchange heat, the absorption heat exchanger 30 is arranged in the absorber 13 and the two can exchange heat, the condensation heat exchanger 28 is arranged in the second condenser 11 and the two can exchange heat, and the evaporative heat exchanger 29 is arranged in the second evaporator 12 and the two can exchange heat; the outlet of the evaporative heat exchanger 29 is connected to the inlet of the first-level dehumidification refrigerant channel through a pipeline, and the outlet of the first-level dehumidification refrigerant channel is connected to the inlet of the evaporative heat exchanger 29 through a pipeline. A dehumidification drive is provided on the pipeline between the medium channel and the evaporative heat exchanger 29; the outlet of the absorption heat exchanger 30 is connected to the inlet of the condensing heat exchanger 28 through a pipeline, the outlet of the condensing heat exchanger 28 is connected to the inlet of the primary regenerative refrigerant channel through a pipeline, the outlet of the primary regenerative refrigerant channel is connected to the inlet of the absorption heat exchanger 30 through a pipeline, and a regeneration drive 14 is provided on the pipeline between the absorption heat exchanger 30 and the condensing heat exchanger 28, the pipeline between the condensing heat exchanger 28 and the primary regenerative refrigerant channel, or the pipeline between the primary regenerative refrigerant channel and the absorption heat exchanger 30; the generator 15, the second condenser 11, the second evaporator 12 and the absorber 13 are connected in sequence, the generator 15 and the absorber 13 are bidirectionally connected through the solution heat exchanger 16, and a solution drive 17 is provided on the pipeline between the generator 15 and the absorber 13.

[0063] The absorption heat pump subsystem structure includes three water circulation systems, a solution circulation system and a refrigerant water circulation system, wherein the first water circulation system is the water circulation between the heat exchanger 27 and the generator heat exchanger 31, and the second water circulation system is the absorption heat exchanger 30, the condensation heat exchanger 28, the primary regeneration refrigerant channel and the regeneration drive 14 connected in sequence through pipelines to form a closed water circulation loop. The third water circulation system is the evaporation heat exchanger 29, the primary dehumidification refrigerant channel and the dehumidification drive connected in sequence through pipelines to form a closed water circulation loop. The generator 15, the solution heat exchanger 16, the absorber 13 and the solution drive 17 are connected in sequence through pipelines to form a solution circulation loop, and the medium of the circulation loop is a lithium bromide solution. The condenser, the evaporator and the absorber 13 are connected in sequence through pipelines to form a refrigerant water system.

[0064] In some embodiments of the present invention, the absorption heat pump subsystem further includes a cold water radiation terminal coil 1; the outlet of the primary dehumidification refrigerant channel is connected to the inlet of the cold water radiation terminal coil 1, and the outlet of the cold water radiation terminal coil 1 is connected to the inlet of the evaporative heat exchanger 29; a refrigeration drive 8 is provided on the pipeline between the cold water radiation terminal coil 1 and the evaporative heat exchanger 29. The cold water radiation terminal coil 1 is added to the third water circulation system, and the cold water therein can be used for cooling.

[0065] In some embodiments of the present invention, the heat exchanger 27 is a heat exchange box, which is bidirectionally connected to the heat exchanger 31 through a pipeline, and a heat exchange driver 18 is provided on the pipeline between the heat exchange box and the heat exchanger 31. Under the driving action of the heat exchange driver 18, the water in the heat exchange box carries the heat released by the first condenser 21 and flows into the heat exchanger 31, transfers the heat to the solution in the generator 15, and then returns to the heat exchange box, completing the process of the first water circulation system, and realizing heat transfer between the two heat pump subsystems.

[0066] In some embodiments of the present invention, a heat supplementary component 20 with a self-heating function is further included, the inlet of the heat supplementary component 20 is connected to a pipeline between the heat exchange box and the heat exchanger 31, and the outlet of the heat supplementary component 20 is connected to another pipeline between the heat exchange box and the heat exchanger 31; a supplementary driving component 19 is provided on the pipeline between the heat supplementary component 20 and the pipeline between the heat exchange box and the heat exchanger 31. The heat supplementary component 20 can provide more heat for the absorption heat pump subsystem, ensure its stable driving and provide the cold and heat required by the primary dehumidification subsystem. The hot water outlet of the heat supplementary component 20 is connected to the outlet of the heat exchange box through the supplementary driving component 19, and is connected to the inlet of the heat exchanger 31 through the heat exchange driving component 18. The outlet of the heat exchanger 31 is divided into two paths, one of which is connected to the inlet of the heat exchange box, and the other is connected to the inlet of the heat supplementary component 20.

[0067] In some embodiments of the present invention, the heat supplement 20 may be an electric water heater or a solar water heater. The electric water heater can stably provide hot water and heat and is easy to control, while the solar water heater utilizes renewable energy to reduce energy consumption.

[0068] The third self-circulation drive, primary drive, first self-circulation drive, refrigeration drive, second self-circulation drive, regeneration drive, solution drive, heat exchange drive, supplementary drive, fourth self-circulation drive and secondary drive mentioned in this application can all use circulating pumps.

[0069] The working principle of the dehumidification system provided by this application is described in detail below:

[0070] The fresh air (air to be processed) first enters the primary dehumidification subsystem and undergoes a heat and mass exchange process with the dehumidification solution flowing down from the top of the primary dehumidifier 7; the low-temperature frozen water flowing out of the evaporative heat exchanger 29 in the absorption heat pump subsystem flows in the heat exchange copper tube in the primary dehumidifier 7, cooling the dehumidification solution flowing down from the top, so as to take away the heat in the heat and mass exchange process between the dehumidification solution and the air, and enhance the dehumidification capacity of the solution in the primary dehumidification subsystem. The fresh air after preliminary treatment enters the secondary dehumidification subsystem and undergoes a heat and mass exchange process with the dehumidification solution flowing down from the top of the secondary dehumidifier 3; in the compression heat pump subsystem, the refrigerant in the built-in heat exchange copper tube of the secondary dehumidifier 3 absorbs heat through phase change, and cools the dehumidification solution flowing down from the top, so as to take away the heat in the heat and mass exchange process between the dehumidification solution and the air, and enhance the dehumidification capacity of the solution in the secondary dehumidification subsystem. After two stages of dehumidification, the fresh air reaches the air supply state and is sent into the room.

[0071] At the same time, the return air enters from the secondary regenerator 23 of the secondary dehumidification subsystem and exchanges heat and mass with the dehumidification solution flowing down from the top of the secondary regenerator 23. The secondary regenerator 23 is both a solution regenerator and a condenser in the compression heat pump subsystem. Part of the refrigerant in the compression heat pump subsystem is cooled in the heat exchange copper tube built into the secondary regenerator 23, and the dehumidification solution flowing down from the top is heated to increase the heat and mass exchange driving force between the solution and the return air, realize the regeneration of the solution and improve the regeneration effect. After the return air flows out of the secondary regenerator 23, the temperature rises and continues to enter the primary regenerator 10 of the primary dehumidification subsystem, and exchanges heat and mass with the dehumidification solution flowing down from the top of the primary regenerator 10. The dehumidification solution of the primary dehumidification subsystem flows in the semipermeable membrane of the primary regenerator 10, and is heated and regenerated by the medium-grade heat from the absorber 13 and the condenser. At the same time, the high-temperature return air will also heat the dehumidification solution in the semipermeable membrane of the primary regenerator 10, and the two heat sources jointly realize the regeneration of the solution of the primary dehumidification subsystem.

[0072] When the two-stage dehumidification subsystem is working, most of the solution at the bottom of the dehumidifier is sent to the top of the dehumidifier by the dehumidifier's self-circulation driving component as the circulating solution inside the dehumidifier, and exchanges heat and mass with the fresh air; the remaining solution flows out from the bottom of the dehumidifier and enters the regenerator for solution regeneration, and most of the solution at the bottom of the regenerator is sent to the top of the dehumidifier by the regenerator's self-circulation driving component as the circulating solution inside the regenerator, and is heated by the heat source for regeneration; the remaining solution flows out from the bottom of the regenerator and is sent to the dehumidifier by the driving component.

[0073] The evaporator in the compression heat pump is combined with the secondary dehumidifier 3. The refrigerant evaporates in the secondary dehumidification refrigerant channel of the secondary dehumidifier 3 and absorbs the heat of the solution in the secondary dehumidification solution channel. The low-temperature and low-pressure refrigerant gas is compressed into high-temperature and high-pressure gas by the compressor 4. A part of the high-temperature and high-pressure gas enters the secondary regeneration refrigerant channel of the secondary regenerator 23 through the solenoid valve 22 to cool down and heat the dehumidification solution. The other part of the high-temperature and high-pressure gas enters the first condenser 21 to heat the liquid water in the heat exchange box.

[0074] The hot water in the heat exchanger and the hot water in the solar water heater enter the generator heat exchanger 31 together to release heat to heat the dilute solution in the generator 15. The dilute solution is heated and concentrated to become a concentrated solution. The concentrated solution exchanges heat with the dilute solution through the solution heat exchanger 16 to cool down, that is, the heat flows back to the absorber 13. The concentrated solution absorbs the refrigerant water vapor in the absorber 13 and releases heat to heat the circulating water in the absorption heat exchanger 30. The high-temperature refrigerant water vapor generated by the concentrated solution in the generator 15 enters the second condenser 11, condenses into liquid refrigerant water and releases heat. The heat released heats the circulating water flowing from the absorption heat exchanger 30 to the condensation heat exchanger 28. The hot water with medium-grade heat flowing out of the condensation heat exchanger 28 enters the primary regeneration refrigerant channel of the primary regenerator 10 to heat and regenerate the solution. The liquid refrigerant water in the second condenser 11 enters the second evaporator 12 to evaporate and absorb heat to become refrigerant water vapor, and the refrigerant water vapor is absorbed by the concentrated solution in the absorber 13. Complete a refrigerant water and lithium bromide solution circulation system.

[0075] The evaporation process in the second evaporator 12 cools the circulating water in the evaporative heat exchanger 29 and turns it into chilled water. The chilled water first flows through the primary dehumidification refrigerant channel in the primary dehumidifier 7 to cool the dehumidification solution, then enters the cold water radiation terminal coil 1 to remove the indoor sensible heat load, and then passes through the refrigeration drive 8 to enter the evaporative heat exchanger 29 and is cooled to form a complete water circulation loop.

[0076] Based on the same inventive concept, the present invention also provides an air conditioning system, including the dehumidification system.

[0077] It should be noted that, in this document, relational terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dehumidification system, characterized in that: It includes a multi-stage dehumidification subsystem and a plurality of mutually coupled heat pump subsystems; The multiple levels of dehumidification subsystems correspond one to one with the multiple heat pump subsystems; Each of the heat pump subsystems provides heat and cold for the corresponding dehumidification subsystem; the multi-stage dehumidification subsystem includes a primary dehumidification subsystem and a secondary dehumidification subsystem; the multiple heat pump subsystems include a main heat pump subsystem and a secondary heat pump subsystem; The auxiliary heat pump subsystem is driven by using the heat provided by the main heat pump subsystem; The primary dehumidification subsystem comprises a primary dehumidifier (7) and a primary regenerator (10), and the secondary dehumidification subsystem comprises a secondary dehumidifier (3) and a secondary regenerator (23); The main heat pump subsystem and the secondary dehumidification subsystem meet at the secondary dehumidifier (3), and heat exchange can be performed in the secondary dehumidifier (3); the main heat pump subsystem and the secondary dehumidification subsystem meet at the secondary regenerator (23), and heat exchange can be performed in the secondary regenerator (23); The auxiliary heat pump subsystem and the primary dehumidification subsystem meet at the primary dehumidifier (7), and heat exchange can be performed in the primary dehumidifier (7); the auxiliary heat pump subsystem and the primary dehumidification subsystem meet at the primary regenerator (10), and heat exchange can be performed in the primary regenerator (10); The main heat pump subsystem is a compression heat pump subsystem, and the auxiliary heat pump subsystem is an absorption heat pump subsystem; the compression heat pump subsystem comprises a first condenser (21), and the absorption heat pump subsystem comprises a heat generating exchanger (31); the first condenser (21) and the heat generating exchanger (31) are connected via a heat exchange element (27) and can perform heat exchange; The primary dehumidification subsystem and the secondary dehumidification subsystem are both semi-permeable membrane dehumidification subsystems; the concentration of the solution in the primary dehumidification subsystem is less than the concentration of the solution in the secondary dehumidification subsystem; The absorption heat pump subsystem further comprises a generator (15), an absorber (13), a second condenser (11), a second evaporator (12), an absorption heat exchanger (30), a condensation heat exchanger (28), an evaporation heat exchanger (29) and a solution heat exchanger (16); the primary dehumidifier (7) is provided with a primary dehumidification refrigerant channel, and the primary regenerator (10) is provided with a primary regeneration refrigerant channel; The generating heat exchanger (31) is arranged in the generator (15) and the two can exchange heat, the absorbing heat exchanger (30) is arranged in the absorber (13) and the two can exchange heat, the condensing heat exchanger (28) is arranged in the second condenser (11) and the two can exchange heat, and the evaporating heat exchanger (29) is arranged in the second evaporator (12) and the two can exchange heat; The outlet of the evaporative heat exchanger (29) is connected to the inlet of the primary dehumidification refrigerant channel via a pipeline, the outlet of the primary dehumidification refrigerant channel is connected to the inlet of the evaporative heat exchanger (29) via a pipeline, and a dehumidification drive component is provided on the pipeline between the primary dehumidification refrigerant channel and the evaporative heat exchanger (29); The outlet of the absorption heat exchanger (30) is connected to the inlet of the condensing heat exchanger (28) via a pipeline, the outlet of the condensing heat exchanger (28) is connected to the inlet of the primary regenerative refrigerant channel via a pipeline, the outlet of the primary regenerative refrigerant channel is connected to the inlet of the absorption heat exchanger (30) via a pipeline, and a regenerative drive component (14) is provided on the pipeline between the absorption heat exchanger (30) and the condensing heat exchanger (28), on the pipeline between the condensing heat exchanger (28) and the primary regenerative refrigerant channel, or on the pipeline between the primary regenerative refrigerant channel and the absorption heat exchanger (30); The generator (15), the second condenser (11), the second evaporator (12) and the absorber (13) are connected in sequence, and the generator (15) and the absorber (13) are connected in both directions via the solution heat exchanger (16); a solution driving component (17) is provided on the pipeline between the generator (15) and the absorber (13).

2. The dehumidification system according to claim 1, characterized in that: The primary dehumidification subsystem further comprises a primary driving member (5); the primary dehumidifier (7) is provided with a primary dehumidification solution channel, and the primary regenerator (10) is provided with a primary regeneration solution channel; The outlet of the primary dehumidification solution channel is connected to the inlet of the primary regeneration solution channel via a pipeline, and the outlet of the primary regeneration solution channel is connected to the inlet of the primary dehumidification solution channel via a pipeline. The primary driving member (5) is arranged on the pipeline between the primary dehumidification solution channel and the primary regeneration solution channel.

3. The dehumidification system according to claim 2, characterized in that: The primary dehumidification subsystem further comprises a first self-circulating driving component (6) and a second self-circulating driving component (9); The outlet and inlet of the primary dehumidification solution channel are connected to the first self-circulation driving member (6) through a pipeline; the outlet and inlet of the primary regeneration solution channel are connected to the second self-circulation driving member (9) through a pipeline.

4. The dehumidification system according to claim 1, characterized in that: The secondary dehumidification subsystem further comprises a secondary driving member (26); the secondary dehumidifier (3) is provided with a secondary dehumidification solution channel, and the secondary regenerator (23) is provided with a secondary regeneration solution channel; The outlet of the secondary dehumidification solution channel is connected to the inlet of the secondary regeneration solution channel via a pipeline, and the outlet of the secondary regeneration solution channel is connected to the inlet of the secondary dehumidification solution channel via a pipeline. The secondary driving member (26) is arranged on the pipeline between the secondary dehumidification solution channel and the secondary regeneration solution channel.

5. The dehumidification system according to claim 4, characterized in that: The secondary dehumidification subsystem further comprises a third self-circulating driving member (2) and a fourth self-circulating driving member (25); The outlet and inlet of the secondary dehumidification solution channel are connected to the third self-circulation driving member (2) through a pipeline; the outlet and inlet of the secondary regeneration solution channel are connected to the fourth self-circulation driving member (25) through a pipeline.

6. The dehumidification system according to claim 1, characterized in that: The compression heat pump subsystem further comprises a compressor (4), a solenoid valve (22), and a throttle valve (24); the secondary dehumidifier (3) is provided with a secondary dehumidification refrigerant channel, and the secondary regenerator (23) is provided with a secondary regeneration refrigerant channel; The exhaust port of the compressor (4) is respectively connected to the inlet of the first condenser (21) and the inlet of the secondary regeneration refrigerant channel, the outlet of the first condenser (21) and the outlet of the secondary regeneration refrigerant channel are respectively connected to one end of a connecting pipeline, the other end of the connecting pipeline is connected to the inlet of the secondary dehumidification refrigerant channel, and the outlet of the secondary dehumidification refrigerant channel is connected to the air intake port of the compressor (4); The solenoid valve (22) is arranged on the pipeline between the exhaust port of the compressor (4) and the inlet of the secondary regeneration refrigerant channel, and the throttle valve (24) is arranged on the connecting pipeline.

7. The dehumidification system according to claim 6, characterized in that: The absorption heat pump subsystem further comprises a cold water radiation terminal coil (1); the outlet of the primary dehumidification refrigerant channel is connected to the inlet of the cold water radiation terminal coil (1), and the outlet of the cold water radiation terminal coil (1) is connected to the inlet of the evaporative heat exchanger (29); and a refrigeration drive component (8) is provided on the pipeline between the cold water radiation terminal coil (1) and the evaporative heat exchanger (29).

8. The dehumidification system according to claim 1, characterized in that: The heat exchange element (27) is a heat exchange box, the heat exchange box and the heat generating exchanger (31) are bidirectionally connected via a pipeline, and a heat exchange driving element (18) is provided on the pipeline between the heat exchange box and the heat generating exchanger (31).

9. The dehumidification system according to claim 8, characterized in that: It also comprises a heat supplement component (20) having a self-heating function, wherein the inlet of the heat supplement component (20) is connected to a pipeline between the heat exchange box and the generating heat exchanger (31), and the outlet of the heat supplement component (20) is connected to another pipeline between the heat exchange box and the generating heat exchanger (31); and a supplement drive component (19) is provided on the pipeline between the heat supplement component (20) and the heat exchange box and the generating heat exchanger (31).

10. The dehumidification system according to claim 9, characterized in that: The heat supplement component (20) may be an electric water heater or a solar water heater.

11. An air conditioning system, characterized in that: A dehumidification system comprising any one of claims 1 to 10.

Images