A heating, air conditioning, and domestic hot water trigeneration device and control method

Abstract

The present invention belongs to the technical field related to energy cascade utilization, and discloses a heating, air conditioning, and domestic hot water trigeneration device, the device is connected to the industrial waste heat hot water source, the air conditioning water pipeline, and the domestic water pipeline respectively, and the device includes a heating module, a refrigeration module, and a hot water heating module, and the heating module, the refrigeration module, and the hot water heating module are connected by pipelines; the heating module is used to heat the air conditioning heating water in the air conditioning water pipeline using the heat of the waste heat hot water; the refrigeration module is used to cool the air conditioning refrigeration water in the air conditioning water pipeline using the heat of the waste heat hot water; the hot water heating module is used to heat the domestic water in the domestic water pipeline. The device is a heating hot water, air conditioning cold water, and domestic hot water trigeneration system, which can realize cooling in summer, heating in winter, and provide domestic hot water all year round.

Description

Technical Field

[0001] The present invention relates to the technical field related to energy cascade utilization, and in particular to a heating, air-conditioning and domestic hot water trigeneration device and a control method. Background Art

[0002] Traditional petrochemical, building materials, electricity and other industrial production industries will generate a large amount of low-grade waste heat resources during the production process. Due to the low quality of these waste heat resources, they are often discarded and not utilized, or the utilization form is single and the depth of utilization is insufficient, resulting in a large amount of energy waste.

[0003] In terms of winter heating, summer cooling and year-round domestic hot water provision in the above-mentioned traditional industrial production industries, on the one hand, the heating, air-conditioning and domestic hot water systems are often independent of each other and unrelated; on the other hand, the driving energy consumption used for winter heating, domestic hot water and air-conditioning cold sources is mainly high-grade electricity and steam thermal energy. Since the industrial production industry uses energy for a relatively long time, the corresponding high-grade energy consumption is relatively large, which is not conducive to energy conservation and emission reduction in the industrial production field.

[0004] According to the actual situation, due to the constraints of process production, the quality of waste heat resources is not high, and the temperature of waste heat hot water discharged during industrial production will not be too high. How to fully explore this low-grade thermal energy through appropriate methods and make deep use of it to provide the outside world with heating hot water, air conditioning cold water and domestic hot water throughout the year, and greatly reduce the energy consumption of auxiliary systems in the industrial production field. In view of this, the purpose of the present invention is to provide a low-temperature hot water driven heating, air conditioning, and domestic hot water trigeneration device suitable for a 9H type natural gas power plant. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a low-temperature hot water driven heating, air conditioning and domestic hot water trigeneration device and control method suitable for a 9H type natural gas power plant, which can achieve cooling in summer and heating in winter, and provide domestic hot water throughout the year.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0007] In a first aspect, the present invention provides a trigeneration device for heating, air conditioning and domestic hot water, wherein the device is respectively connected to an industrial waste heat hot water source, an air conditioning water pipe and a domestic water pipe, and the device comprises a heating module, a refrigeration module and a hot water heating module, wherein the heating module, the refrigeration module and the hot water heating module are connected via pipes; the heating module is respectively connected to the industrial waste heat hot water source and the air conditioning water pipe, and is used to heat the air conditioning heating water in the air conditioning water pipe by using the heat of the waste heat hot water; the refrigeration module is respectively connected to the industrial waste heat hot water source and the air conditioning water pipe, and is used to cool the air conditioning refrigeration water in the air conditioning water pipe by using the heat of the waste heat hot water; the hot water heating module is respectively connected to the industrial waste heat hot water source, the heating module, the refrigeration module and the domestic water pipe, and is used to heat the domestic water in the domestic water pipe.

[0008] Furthermore, the industrial waste heat hot water source transports and recovers waste heat hot water through the waste heat hot water supply port and the waste heat hot water return port; the air conditioning water pipeline transports air conditioning heating water through the air conditioning hot water supply port and the air conditioning hot water return port; the air conditioning water pipeline transports air conditioning cooling water through the air conditioning cold water supply port and the air conditioning cold water return port; the domestic water pipeline transports the domestic water through the tap water inlet and the domestic hot water port; the water inlet end of the heating module is respectively connected to the waste heat hot water supply port and the air conditioning hot water return port, and the water outlet end of the heating module is respectively connected to the water inlet end of the hot water heating module and the air conditioning hot water supply port; The water inlet end of the refrigeration module is respectively connected to the waste heat hot water supply port and the air conditioning cold water return port, and the water outlet end of the refrigeration module is respectively connected to the water inlet end of the hot water heating module and the air conditioning cold water supply port; the water inlet end of the hot water heating module is also respectively connected to the tap water inlet and the waste heat hot water supply port, and the water outlet end of the hot water heating module is respectively connected to the domestic hot water port and the waste heat hot water return port.

[0009] Furthermore, the heating module includes an air-conditioning hot water circulation pump, a first electric two-way valve, a first heat exchanger, and a first electric regulating valve; the air-conditioning heating water flows through the air-conditioning hot water circulation pump and the first electric two-way valve through a pipeline and flows out after heat exchange on the secondary side of the first heat exchanger; the waste hot water flows through the first electric regulating valve through a pipeline and flows out after heat exchange on the primary side of the first heat exchanger.

[0010] Furthermore, the refrigeration module includes: an air-conditioning cold water circulation pump, a second electric two-way valve, a low-temperature hot water type lithium bromide refrigerator, a third electric two-way valve, a cooling water circulation pump, a cooling tower and a second electric regulating valve; the air-conditioning refrigeration water flows through the air-conditioning cold water circulation pump and the second electric two-way valve through a pipeline to enter the low-temperature hot water type lithium bromide refrigerator for treatment to obtain air-conditioning refrigeration water with a lower temperature; the waste hot water flows through the second electric regulating valve through a pipeline to enter the low-temperature hot water type lithium bromide refrigerator for treatment and then flows out; the low-temperature hot water type lithium bromide refrigerator is connected to the cooling tower through a pipeline, and the third electric two-way valve and the cooling water circulation pump are installed on the pipeline entering the cooling tower.

[0011] Furthermore, the hot water heating module includes: a domestic hot water circulation pump, a fourth electric two-way valve, a second heat exchanger, a third heat exchanger and a third electric regulating valve; the domestic water flows through the domestic hot water circulation pump and the fourth electric two-way valve through a pipeline, enters the secondary sides of the second heat exchanger and the third heat exchanger in turn, and then flows out; the waste hot water flows through the third electric regulating valve through a pipeline, and then flows out after heat exchange on the primary side of the third heat exchanger.

[0012] Furthermore, the device also includes a fourth electric regulating valve and a fifth electric regulating valve; the waste hot water is divided into 4 paths, one of which enters the primary side of the second heat exchanger of the hot water heating module, one of which enters the primary side of the third heat exchanger of the hot water heating module, one of which enters the primary side of the first heat exchanger of the heating module, and one of which enters the hot water inlet of the low-temperature hot water type lithium bromide refrigerator of the refrigeration module; the primary side water outlet of the first heat exchanger of the heating module or the waste hot water outlet of the refrigeration module is divided into two paths, one of which flows through the fourth electric regulating valve to connect to the waste hot water return port; the other flows through the fifth electric regulating valve to enter the hot water heating module, and then connects to the waste hot water return port after heat exchange in the second heat exchanger of the hot water heating module.

[0013] Furthermore, the modules of the device are integrated into an integrated module.

[0014] In a second aspect, the present invention provides a control method for a trigeneration device for heating, air conditioning and domestic hot water, which is used to control the above-mentioned trigeneration device for heating, air conditioning and domestic hot water, and includes the following steps: obtaining an external command signal; according to the external command signal, controlling the opening and closing of the heating module, the refrigeration module and the hot water heating module to form different cold and hot medium circulation flow paths between the trigeneration device, the industrial waste heat hot water source, the air conditioning water pipe and the domestic water pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the present invention, the temperature difference between the supply and return water of the primary heated hot water can be fully increased in winter and summer, so as to realize the cascade utilization of energy and reduce the energy consumption of the primary heated hot water. It can realize the deep recovery of low-grade waste heat energy while implementing flexible, reliable and composite energy supply, and save energy to the maximum extent. It has the characteristics of compact structure, easy operation and strong adaptability, and is particularly suitable for applications with low-grade waste heat energy;

[0017] 2. In the technical solution of the present invention, five operation modes can be realized, namely, the heating module provides heating alone, the cooling module provides cooling alone, the hot water heating module provides domestic hot water alone, the heating module operates in conjunction with the hot water heating module, and the cooling module operates in conjunction with the hot water heating module;

[0018] 3. The present invention is that under the two operating conditions of the heating module combined with the hot water heating module and the cooling module combined with the hot water heating module, the system can fully increase the supply and return water temperature difference of the waste heat hot water, reduce the transportation energy consumption of the waste heat hot water, realize the cascade utilization of energy, save energy to the maximum extent, and realize the deep recovery and utilization of low-grade waste heat energy;

[0019] 4. The present invention connects the heating module, the refrigeration module and the hot water heating module through pipelines to form an integrated heating, air conditioning and domestic hot water trigeneration device. All switching valves are electric valves and are uniformly controlled. The execution is flexible and reliable, the structure is compact, and it is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the heating, air conditioning and domestic hot water trigeneration device of the present invention.

[0021] In the figure:

[0022] 1.1, air conditioning hot water circulation pump; 1.2, first electric two-way valve; 1.3, first heat exchanger; 1.4, first electric regulating valve; 2.1, air conditioning cold water circulation pump; 2.2, second electric two-way valve; 2.3, low-temperature hot water type lithium bromide refrigerator; 2.4, third electric two-way valve; 2.5, cooling water circulation pump; 2.6, cooling tower; 2.7, second electric regulating valve; 3.1, domestic hot water circulation pump; 3.2, fourth electric two-way valve; 3.3, second heat exchanger; 3.4, third heat exchanger; 3.5, third electric regulating valve; 4, fourth electric regulating valve; 5, fifth electric regulating valve; 6, sixth electric regulating valve. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0024] Embodiment 1:

[0025] The present embodiment provides a trigeneration device for heating, air conditioning and domestic hot water, which is respectively connected to an industrial waste heat hot water source, an air conditioning water pipeline and a domestic water pipeline, and comprises a heating module, a refrigeration module and a hot water heating module, wherein the heating module, the refrigeration module and the hot water heating module are connected via pipelines; the heating module is respectively connected to the industrial waste heat hot water source and the air conditioning water pipeline, and is used to heat the air conditioning heating water in the air conditioning water pipeline by using the heat of the waste heat hot water; the refrigeration module is respectively connected to the industrial waste heat hot water source and the air conditioning water pipeline, and is used to cool the air conditioning refrigeration water in the air conditioning water pipeline by using the heat of the waste heat hot water; the hot water heating module is respectively connected to the industrial waste heat hot water source, the heating module, the refrigeration module and the domestic water pipeline, and is used to heat the domestic water in the domestic water pipeline.

[0026] This embodiment belongs to a heating, air conditioning, and domestic hot water trigeneration device driven by low-temperature hot water suitable for a 9H type natural gas power plant. The device is a heating hot water, air conditioning cold water, and domestic hot water trigeneration system, which can realize cooling in summer, heating in winter, and provide domestic hot water throughout the year. Through the present invention, the supply and return water temperature difference of the primary heated hot water can be fully increased in winter and summer, and the energy cascade utilization can be realized, and the transportation energy consumption of the primary heated hot water can be reduced. It can realize deep recovery of low-grade waste heat energy while performing flexible, reliable, and composite energy supply, and save energy to the maximum extent. It has the characteristics of compact structure, easy operation, and strong adaptability. It is particularly suitable for applications with low-grade waste heat energy.

[0027] Specifically, the industrial waste heat hot water source transports and recovers waste heat hot water through the waste heat hot water supply port and the waste heat hot water return port; the air conditioning water pipeline transports water for air conditioning heating through the air conditioning hot water supply port and the air conditioning hot water return port; the air conditioning water pipeline transports water for air conditioning cooling through the air conditioning cold water supply port and the air conditioning cold water return port.

[0028] The water inlet end of the heating module is respectively connected to the waste heat hot water supply port and the air conditioning hot water return port, and the water outlet end of the heating module is respectively connected to the water inlet end of the hot water heating module and the air conditioning hot water supply port; the water inlet end of the refrigeration module is respectively connected to the waste heat hot water supply port and the air conditioning cold water return port, and the water outlet end of the refrigeration module is respectively connected to the water inlet end of the hot water heating module and the air conditioning cold water supply port; the water inlet end of the hot water heating module is also respectively connected to the tap water inlet and the waste heat hot water supply port, and the water outlet end of the hot water heating module is respectively connected to the domestic hot water port and the waste heat hot water return port.

[0029] Specifically, the heating module includes an air-conditioning hot water circulation pump 1.1, a first electric two-way valve 1.2 (V1), a first heat exchanger 1.3 (H1), and a first electric regulating valve 1.4 (VTJ1); the air-conditioning heating water flows through the air-conditioning hot water circulation pump 1.1 and the first electric two-way valve 1.2 (V1) through a pipeline, and flows out after heat exchange on the secondary side of the first heat exchanger 1.3 (H1); the waste hot water flows through the first electric regulating valve 1.4 (VTJ1) through a pipeline, and flows out after heat exchange on the primary side of the first heat exchanger 1.3 (H1).

[0030] Specifically, the refrigeration module includes: an air-conditioning cold water circulation pump 2.1, a second electric two-way valve 2.2 (V2.1), a low-temperature hot water type lithium bromide refrigerator 2.3, a third electric two-way valve 2.4 (V2.2), a cooling water circulation pump 2.5, a cooling tower 2.6 and a second electric regulating valve; the air-conditioning refrigeration water flows through the air-conditioning cold water circulation pump 2.1 and the second electric two-way valve 2.2 (V2.1) through a pipeline and enters the low-temperature hot water type lithium bromide refrigerator 2.3 for treatment to obtain air-conditioning refrigeration water with a lower temperature; the waste hot water flows through the second electric regulating valve through a pipeline and enters the low-temperature hot water type lithium bromide refrigerator 2.3 for treatment and then flows out; the low-temperature hot water type lithium bromide refrigerator 2.3 is connected to the cooling tower 2.6 through a pipeline, and the pipeline entering the cooling tower 2.6 is equipped with the third electric two-way valve 2.4 (V2.2) and the cooling water circulation pump 2.5.

[0031] Specifically, the hot water heating module includes: a domestic hot water circulation pump 3.1, a fourth electric two-way valve 3.2 (V3), a second heat exchanger 3.3 (H2), a third heat exchanger 3.4 (H3) and a third electric regulating valve 3.5 (VTJ3); the domestic water flows through the domestic hot water circulation pump 3.1 and the fourth electric two-way valve 3.2 (V3) through a pipeline, enters the second heat exchanger 3.3 (H2) and the third heat exchanger 3.4 (H3) on the secondary side in turn, and then flows out; the waste hot water flows through the third electric regulating valve 3.5 (VTJ3) through a pipeline, and then flows out after heat exchange on the primary side of the third heat exchanger 3.4 (H3).

[0032] Specifically, the device further includes a fourth electric regulating valve 4 (VTJ4) and a fifth electric regulating valve 5 (VTJ5); the waste hot water is divided into 4 paths, one of which enters the primary side of the second heat exchanger 3.3 (H2) of the hot water heating module, one of which enters the primary side of the third heat exchanger 3.4 (H3) of the hot water heating module, one of which enters the primary side of the first heat exchanger 1.3 (H1) of the heating module, and one of which enters the hot water inlet of the low-temperature hot water type lithium bromide refrigerator 2.3 of the refrigeration module; the primary side water outlet of the first heat exchanger 1.3 (H1) of the heating module or the waste hot water outlet of the refrigeration module is divided into two paths, one of which flows through the fourth electric regulating valve 4 (VTJ4) and connects to the waste hot water return port; the other flows through the fifth electric regulating valve 5 (VTJ5) and enters the hot water heating module, and then connects to the waste hot water return port after heat exchange in the second heat exchanger 3.3 (H2) of the hot water heating module.

[0033] Specifically, the modules of the device are integrated into an integrated module.

[0034] Through this embodiment, the temperature difference between the supply and return water of the primary heated hot water can be fully increased in winter and summer, realizing the cascade utilization of energy and reducing the energy consumption of the primary heated hot water. It can realize the deep recovery of low-grade waste heat energy while implementing flexible, reliable and composite energy supply, save energy to the maximum extent, and has the characteristics of compact structure, easy operation and strong adaptability, and is particularly suitable for applications with low-grade waste heat energy; this embodiment can also realize five operation modes, including heating module for heating alone, cooling module for cooling alone, hot water heating module for domestic hot water alone, heating module combined with hot water heating module operation, cooling module combined with hot water heating module operation;

[0035] In this embodiment, the heating module, the cooling module and the hot water heating module are connected by pipes to form an integrated heating, air conditioning and domestic hot water trigeneration device. All switching valves are electric valves and are uniformly controlled. The execution is flexible and reliable, the structure is compact, and it is easy to operate.

[0036] In the attached Figure 1 In the heating, air conditioning and domestic hot water trigeneration device shown, the heating module is in the heating condition alone: ​​the air conditioning hot water circulation pump 1.1, the first electric two-way valve 1.2 (V1), the first electric regulating valve 1.4 (VTJ1) and the fourth electric regulating valve 4 (VTJ4) are all open, and other equipment and valves are all closed. The 70°C waste heat hot water is connected to the waste heat hot water return water after passing through the first electric regulating valve 1.4 (VTJ1), the first heat exchanger 1.3 (H1), and the fourth electric regulating valve 4 (VTJ4). The secondary side of the first heat exchanger 1.3 (H1) exchanges heat to produce 60°C air conditioning hot water.

[0037] like Figure 1 As shown, the refrigeration module is in the cooling condition of supplying cooling alone: ​​the air conditioning cold water circulation pump 2.1, the second electric two-way valve 2.2 (V2.1), the low-temperature hot water type lithium bromide refrigerator 2.3, the third electric two-way valve 2.4 (V2.2), the cooling water circulation pump 2.5, the cooling tower 2.6 and the second electric regulating valve are all turned on, and other equipment and valves are all closed. The 70°C waste heat hot water is connected to the waste heat hot water return water after passing through the second electric regulating valve, the low-temperature hot water type lithium bromide refrigerator 2.3, and the fourth electric regulating valve 4 (VTJ4), and the 12°C air conditioning cooling water is passed through the low-temperature hot water type lithium bromide refrigerator 2.3 to generate 7°C air conditioning cold water supply.

[0038] like Figure 1 As shown, the hot water heating module is used to supply domestic hot water alone: ​​the domestic hot water circulation pump 3.1, the fourth electric two-way valve 3.2 (V3) and the third electric regulating valve 3.5 (VTJ3) are all turned on, and other equipment and valves are all closed. The hot water heating module is provided with a two-stage heat exchanger, the second heat exchanger 3.3 (H2) is a preheater, and the third heat exchanger 3.4 (H3) is a reheater. One path of the 70°C waste hot water is converted into hot water of about 58°C after heat exchange in the preheating second heat exchanger 3.3 (H2) and connected to the waste hot water return water, and the other path is converted into hot water of about 58°C after heat exchange in the reheating third heat exchanger 3.4 (H3) and connected to the waste hot water return water.

[0039] like Figure 1 As shown in the figure, the heating module is combined with the hot water heating module to operate: the air conditioning hot water circulation pump 1.1, the first electric two-way valve 1.2 (V1), the first electric regulating valve 1.4 (VTJ1), the fifth electric regulating valve 5 (VTJ5), the domestic hot water circulation pump 3.1, the fourth electric two-way valve 3.2 (V3) and the third electric regulating valve 3.5 (VTJ3) are all open, and other equipment and valves are all closed. The 70℃ waste heat hot water is cooled to 58℃ low-temperature hot water after passing through the first heating heat exchanger 1.3 (H1) in the heating module. The 58℃ low-temperature hot water enters the first-stage preheating second heat exchanger 3.3 (H2) in the domestic hot water heating module to preheat the domestic hot water, and then the 58℃ low-temperature hot water continues to cool down to about 30℃ hot water; the other 70℃ waste heat hot water is converted into about 58℃ hot water after heat exchange in the second-stage reheating third heat exchanger 3.4 (H3). The outlet water of the first-stage preheating second heat exchanger 3.3 (H2) at about 30°C is mixed with the outlet water of the second-stage reheating third heat exchanger 3.4 (H3) at about 58°C, and then connected to the waste heat hot water return water. In this way, the supply and return water temperature difference of the waste heat hot water can be fully reduced under this working condition, the transmission energy consumption of the waste heat hot water can be reduced, the energy cascade utilization can be realized, the energy can be saved to the maximum extent, and the low-grade waste heat energy can be deeply recovered and utilized.

[0040] like Figure 1As shown, the operating conditions of the refrigeration module combined with the hot water heating module are: the air-conditioning cold water circulation pump 2.1, the second electric two-way valve 2.2 (V2.1), the low-temperature hot water type lithium bromide refrigerator 2.3, the third electric two-way valve 2.4 (V2.2), the cooling water circulation pump 2.5, the cooling tower 2.6, the second electric regulating valve, the fifth electric regulating valve 5 (VTJ5), the domestic hot water circulation pump 3.1, the fourth electric two-way valve 3.2 (V3) and the third electric regulating valve 3.5 (VTJ3) are all opened, and other equipment and valves are all closed. The 70℃ waste heat hot water is cooled to 58℃ low temperature hot water after passing through the low temperature hot water type lithium bromide refrigerator 2.3. The 58℃ low temperature hot water enters the first stage preheating second heat exchanger 3.3 (H2) in the domestic hot water heating module to preheat the domestic hot water, and then the 58℃ low temperature hot water continues to cool down to about 30℃ hot water; the other 70℃ waste heat hot water is converted into about 58℃ hot water after heat exchange in the second stage reheating third heat exchanger 3.4 (H3). The outlet water of about 30℃ of the first stage preheating second heat exchanger 3.3 (H2) is mixed with the outlet water of about 58℃ of the second stage reheating third heat exchanger 3.4 (H3), and then the waste heat hot water is returned. In this way, the supply and return water temperature difference of the waste heat hot water is fully reduced under this working condition, the transportation energy consumption of the waste heat hot water is reduced, the energy cascade utilization is realized, the energy is saved to the maximum extent, and the low-grade waste heat energy is deeply recycled.

[0041] Embodiment 2:

[0042] The present embodiment provides a control method for a heating, air-conditioning, and domestic hot water trigeneration device, which is used to control the heating, air-conditioning, and domestic hot water trigeneration device described in Embodiment 1, and comprises the following steps: obtaining an external command signal; according to the external command signal, controlling the opening and closing of a heating module, a cooling module, and a hot water heating module, so as to form different cold and hot medium circulation flow paths between the trigeneration device, an industrial waste heat hot water source, an air conditioning water pipe, and a domestic water pipe, so as to realize five operation modes, namely, heating module alone for heating, cooling module alone for cooling, hot water heating module alone for domestic hot water, heating module combined with hot water heating module operation, and cooling module combined with hot water heating module operation;

[0043] In this embodiment, under two operating conditions, the heating module is operated in conjunction with the hot water heating module, and the cooling module is operated in conjunction with the hot water heating module. The system can fully increase the supply and return water temperature difference of the waste heat hot water, reduce the transmission energy consumption of the waste heat hot water, realize the cascade utilization of energy, save energy to the maximum extent, and realize the deep recovery and utilization of low-grade waste heat energy;

[0044] In this embodiment, the heating module, the cooling module and the hot water heating module can be connected through pipes to form an integrated heating, air conditioning and domestic hot water trigeneration device. All switching valves are electric valves and are uniformly controlled. The execution is flexible and reliable, the structure is compact, and it is easy to operate.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; 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 the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A heating, air conditioning and domestic hot water trigeneration device, Features: The device is respectively connected to an industrial waste heat hot water source, an air conditioning water pipe and a domestic water pipe, and comprises a heating module, a refrigeration module and a hot water heating module, wherein the heating module, the refrigeration module and the hot water heating module are connected by pipes; The heating module is connected to the industrial waste heat hot water source and the air conditioning water pipeline respectively, and is used to heat the air conditioning heating water in the air conditioning water pipeline by using the heat of the waste heat hot water; The refrigeration module is connected to the industrial waste heat hot water source and the air conditioning water pipeline respectively, and is used to use the heat of the waste heat hot water to cool the air conditioning refrigeration water in the air conditioning water pipeline; The hot water heating module is respectively connected to the industrial waste heat hot water source, the heating module, the refrigeration module and the domestic water pipeline, and is used to heat the domestic water in the domestic water pipeline; The hot water heating module comprises: a domestic hot water circulation pump (3.1), a fourth electric two-way valve (3.2), a second heat exchanger (3.3), a third heat exchanger (3.4) and a third electric regulating valve (3.5); The domestic water flows through the pipeline through the domestic hot water circulation pump (3.1) and the fourth electric two-way valve (3.2) and enters the second heat exchanger (3.3) and the secondary side of the third heat exchanger (3.4) in sequence for heat exchange before flowing out; the waste hot water flows through the pipeline through the third electric regulating valve (3.5) and flows out after heat exchange on the primary side of the third heat exchanger (3.4); The waste hot water is divided into four paths, one of which enters the primary side of the second heat exchanger (3.3) of the hot water heating module, one of which enters the primary side of the third heat exchanger (3.4) of the hot water heating module, one of which enters the heating module, and one of which enters the cooling module; The modules of the device are integrated into an integrated module.

2. The heating, air conditioning and domestic hot water trigeneration device according to claim 1, Features: The industrial waste heat hot water source transports and recovers waste heat hot water through a waste heat hot water supply port and a waste heat hot water return port; The air conditioning water pipe delivers air conditioning heating water through the air conditioning hot water supply port and the air conditioning hot water return port; the air conditioning water pipe delivers air conditioning cooling water through the air conditioning cold water supply port and the air conditioning cold water return port; The domestic water pipeline transports the domestic water through the tap water inlet and the domestic hot water outlet; The water inlet of the heating module is connected to the waste heat hot water supply port and the air conditioning hot water return port respectively, and the water outlet of the heating module is connected to the water inlet of the hot water heating module and the air conditioning hot water supply port respectively; The water inlet of the refrigeration module is connected to the waste heat hot water supply port and the air conditioner cold water return port respectively, and the water outlet of the refrigeration module is connected to the water inlet of the hot water heating module and the air conditioner cold water supply port respectively; The water inlet of the hot water heating module is also connected to the tap water inlet and the waste heat hot water supply port respectively, and the water outlet of the hot water heating module is connected to the domestic hot water port and the waste heat hot water return port respectively.

3. The heating, air conditioning and domestic hot water trigeneration device according to claim 2, Features: The heating module comprises an air-conditioning hot water circulation pump (1.1), a first electric two-way valve (1.2), a first heat exchanger (1.3), and a first electric regulating valve (1.4); The air conditioning heating water flows through the air conditioning hot water circulation pump (1.1) and the first electric two-way valve (1.2) through a pipeline, and flows out after heat exchange on the secondary side of the first heat exchanger (1.3); the waste hot water flows through the first electric regulating valve (1.4) through a pipeline, and flows out after heat exchange on the primary side of the first heat exchanger (1.3).

4. The heating, air conditioning and domestic hot water trigeneration device according to claim 3, Features: The refrigeration module comprises: an air-conditioning cold water circulation pump (2.1), a second electric two-way valve (2.2), a low-temperature hot water type lithium bromide refrigerator (2.3), a third electric two-way valve (2.4), a cooling water circulation pump (2.5), a cooling tower (2.6) and a second electric regulating valve (2.7); The air conditioning refrigeration water flows through the air conditioning cold water circulation pump (2.1) and the second electric two-way valve (2.2) through a pipeline and enters the low-temperature hot water type lithium bromide refrigerator (2.3) for treatment to obtain air conditioning refrigeration water with a lower temperature; the waste hot water flows through the pipeline and passes through the second electric regulating valve (2.7) and enters the low-temperature hot water type lithium bromide refrigerator (2.3) for treatment and then flows out; the low-temperature hot water type lithium bromide refrigerator (2.3) is connected to the cooling tower (2.6) through a pipeline, and the pipeline entering the cooling tower (2.6) is equipped with the third electric two-way valve (2.4) and the cooling water circulation pump (2.5).

5. The heating, air conditioning and domestic hot water trigeneration device according to claim 4, Features: The device further comprises a fourth electric regulating valve (4) and a fifth electric regulating valve (5); The primary side water outlet of the first heat exchanger (1.3) of the heating module or the waste heat hot water outlet of the cooling module is divided into two paths, one of which flows through the fourth electric regulating valve (4) and reaches the waste heat hot water return port; the other flows through the fifth electric regulating valve (5) and enters the hot water heating module, and then reaches the waste heat hot water return port after heat exchange in the second heat exchanger (3.3) of the hot water heating module.

6. A method for controlling a heating, air conditioning and domestic hot water trigeneration device, for controlling the heating, air conditioning and domestic hot water trigeneration device according to any one of claims 1 to 5, It is characterized in that include: Obtain an external command signal; according to the external command signal, control the opening and closing of the heating module, the refrigeration module and the hot water heating module to form different cold and hot medium circulation flow paths between the trigeneration device, the industrial waste heat hot water source, the air conditioning water pipe and the domestic water pipe.

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