Heat recovery and reuse system, method and electronic equipment

Abstract

The present invention relates to the field of energy recovery technology, and specifically discloses a heat recovery and reuse system, method and electronic equipment. The heat recovery and reuse system includes a frequency conversion host, a heat recovery heat exchanger, a cooling water module, a hot water storage tank, a hot water circulation pump and a hot water control module, wherein: the frequency conversion host is used for cooling and heating, the heat recovery heat exchanger is installed between the condenser outlet of the frequency conversion host and the cooling water module, and is used to recover condensation heat; the cooling water module includes a cooling water pump, a cooling tower and a pipeline, and is used to cool the heat generated by the frequency conversion host during the refrigeration process. The heat recovery and reuse system of the embodiment of the present invention can convert the heat energy released by the air-conditioning frequency conversion host during the condensation process into hot water, realize the secondary utilization of energy, and reduce energy consumption and carbon emissions: not only that, the recovered hot water can be used for a variety of purposes, such as heating, hot water supply, etc., reducing the energy cost of the enterprise.

Description

Technical Field

[0001] The present invention relates to the technical field of energy recovery, and in particular to a heat energy recovery and reuse system, method and electronic equipment. Background Art

[0002] The paint warehouse has strict requirements on temperature and humidity control. At present, it adopts a fresh air natural exhaust system, with a designed air volume of 12000m³ / h. The cooling capacity required in summer is about 85kw (90kw is selected), and the heating capacity required in winter is about 73kw (80kw is selected). The cooling is achieved by a 90kw variable frequency direct expansion outdoor unit plus an evaporating coil, and the heating uses 70℃ hot water as the heat source.

[0003] When the existing air conditioning system is in operation, the heat generated by refrigeration and the cold generated by heating are directly discharged into the environment, causing a large amount of energy waste, increasing the operating costs of the enterprise, and not meeting the requirements of energy conservation and environmental protection. In addition, common heat recovery technologies such as rotary, plate, heat pipe, and solution have various problems when applied to paint warehouses. The rotary type is easy to wear and has a high air leakage rate; the plate type has an unsatisfactory heat exchange efficiency and is prone to scaling and clogging; the heat pipe type has limited adaptability to working conditions; and the solution type has a large volume and a high initial investment. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the purpose of the present invention is to provide a heat energy recovery and reuse system, method and electronic equipment to improve the utilization efficiency of energy.

[0005] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes a heat recovery and reuse system, the method comprising: a heat recovery and reuse system, comprising a frequency conversion host, a heat recovery heat exchanger, a cooling water module, a hot water storage tank, a hot water circulation pump and a hot water control module, wherein:

[0006] The variable frequency host is used for cooling and heating, and the heat recovery heat exchanger is installed between the condenser outlet of the variable frequency host and the cooling water module to recover condensation heat;

[0007] The cooling water module includes a cooling water pump, a cooling tower and a pipeline, which is used to cool the heat generated by the variable frequency host during the refrigeration process;

[0008] The hot water storage tank is used to store hot water recovered from the heat recovery heat exchanger; the hot water circulation pump is used to extract hot water from the hot water storage tank and transport it to the area or equipment that needs to be heated;

[0009] The hot water control module includes a temperature sensor, a flow sensor and a controller, which are used to monitor the temperature and flow parameters of hot water when it flows in the system, and adjust the speed of the hot water circulation pump and the heating or cooling effect of the hot water storage tank according to actual needs.

[0010] In some embodiments of the present invention, an air conditioning box is included, which includes a fresh air section, a primary filter section, a heating section, an evaporation section and a fan outlet section. The air conditioning box is responsible for delivering the treated air into the warehouse.

[0011] In some embodiments of the present invention, a three-way regulating valve is included. The three-way regulating valve is installed between the hot water circulation pump and the heating section of the air-conditioning box and is used to adjust the flow of hot water entering the air-conditioning box.

[0012] In some embodiments of the present invention, an expansion water tank is included, which is connected to the cooling water module and the hot water circulation pump through pipelines. The expansion water tank is used to absorb the expansion of the cooling water module and the hot water circulation pump caused by temperature changes during operation.

[0013] In some embodiments of the present invention, a water replenishment module is included, which includes a water replenishment pump, a water replenishment valve and a water tank. The water replenishment module is connected to the cooling water module and the hot water circulation pump through a pipeline to replenish the water lost due to evaporation and leakage.

[0014] In some embodiments of the present invention, a safety valve is installed at the highest point of the cooling water module and the hot water circulation pump, which is used to automatically release the pressure when the system pressure is too high to ensure the safety of the system.

[0015] In some embodiments of the present invention, an exhaust valve is included, and the exhaust valve is used to exhaust the air in the cooling water module and the hot water circulation pump to prevent air blocking from affecting system performance.

[0016] In some embodiments of the present invention, a communication module is included, and the communication module is used to realize communication between the system and a host computer or a remote monitoring center, so as to facilitate remote monitoring and fault diagnosis.

[0017] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes a method for heat recovery and reuse, including heat recovery and utilization in cooling mode and heat recovery and utilization in heating mode, wherein:

[0018] There are three steps in cooling mode:

[0019] A1. Refrigeration cycle start-up and condensation heat recovery;

[0020] The inverter host starts the refrigeration cycle, and the refrigerant evaporates and absorbs heat in the evaporator, which reduces the air temperature in the warehouse. The gaseous refrigerant is compressed by the compressor into a high-temperature and high-pressure state and then enters the condenser. In the condenser, the refrigerant releases heat to the surrounding environment and condenses into a liquid state. At this time, the heat recovery heat exchanger starts to work. It is installed between the outlet of the inverter host condenser and the cooling water module. It uses high-efficiency heat exchange plates to transfer the condensation heat released by the refrigerant to the cooling water. The cooling water absorbs heat in the heat recovery heat exchanger and its temperature rises, and then enters the cooling water pump of the cooling water module;

[0021] A2. Cooling water circulation and heat storage;

[0022] The cooling water pump pressurizes and delivers the heated cooling water to the cooling tower. The cooling tower lowers the temperature of the cooling water through heat exchange with the outside air. Part of the cooled water flows back to the heat recovery heat exchanger to continue absorbing the condensation heat. The other part can be discharged or recycled according to the actual situation after meeting the heat dissipation requirements of the system. At the same time, the heated water flowing out of the cold side of the heat recovery heat exchanger enters the hot water storage tank for storage, realizing the recovery and preliminary storage of the condensation heat.

[0023] A3. Hot water utilization and air conditioning box pre-cooling adjustment;

[0024] When the paint warehouse needs to be heated, the hot water circulation pump starts to pump out the hot water in the hot water storage tank. The hot water first passes through the hot water control module, where the temperature sensor and flow sensor monitor the temperature and flow parameters of the hot water in real time and transmit the data to the controller. The controller adjusts the speed of the hot water circulation pump according to the preset control strategy and actual needs to control the flow and pressure of the hot water. The hot water passes through the three-way regulating valve and adjusts the appropriate hot water flow according to the temperature demand of the warehouse to enter the heating section of the air-conditioning box. In the air-conditioning box, the hot water exchanges heat with the incoming fresh air to preheat the air. After the air temperature is increased, it is sent to the warehouse, realizing the reuse of heat energy. At the same time, in the evaporation section of the air-conditioning box, the cold energy generated by the variable frequency host evaporator is used to cool and dehumidify the air to ensure that the temperature and humidity of the air sent to the warehouse meet the requirements;

[0025] There are three steps in heating mode:

[0026] B1. Heating cycle start-up and heat recovery preparation;

[0027] The inverter host switches to heating mode. At this time, the refrigerant circulates in reverse, absorbs heat outdoors, and then enters the indoor unit to release heat, raising the air temperature in the warehouse. During the process of heating the air in the heating section of the air conditioner, the hot water temperature gradually decreases, and low-temperature hot water flows out from the heating section of the air conditioner.

[0028] B2. Low-temperature hot water heat recovery and storage;

[0029] The low-temperature hot water flowing out of the heating section of the air-conditioning box enters the hot side of the heat recovery heat exchanger. At this time, the cooling water on the cold side of the heat recovery heat exchanger exchanges heat with the low-temperature hot water on the hot side. The heat of the low-temperature hot water is transferred to the cooling water, the cooling water temperature increases, and the low-temperature hot water temperature further decreases and then flows back to the hot water storage tank;

[0030] B3. System heat balance and optimal utilization;

[0031] After the temperature of the hot water in the hot water storage tank drops, it can be pumped out and utilized again by the hot water circulation pump according to actual conditions. At the same time, after the cooling water absorbs the heat of the low-temperature hot water, the increased temperature cooling water can be directed to other equipment or areas that need preheating, such as preheating some pipes or equipment when starting in winter, thereby improving the overall energy utilization efficiency of the system.

[0032] To achieve the above objectives, a third aspect of the present invention provides an electronic device, comprising a memory, a processor and a computer program stored in the memory, wherein when the computer program is executed by the processor, the above-mentioned heat energy recovery and reuse method is implemented.

[0033] The heat energy recovery and reuse system, method and electronic device of the embodiments of the present invention can convert the heat energy released by the air-conditioning variable frequency host during the condensation process into hot water, thereby realizing the secondary utilization of energy and reducing energy consumption and carbon emissions. Moreover, the recovered hot water can be used for a variety of purposes, such as heating, hot water supply, etc., thereby reducing the energy cost of the enterprise. The efficient operation and intelligent control of the system improve the energy utilization efficiency and further enhance the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic flow chart of a heat energy recovery and reuse method according to an embodiment of the present invention;

[0035] Figure 2 It is a schematic structural diagram of an electronic device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The following describes a heat energy recovery and reuse system, method, and electronic device according to embodiments of the present invention with reference to the accompanying drawings.

[0038] A heat recovery and reuse system includes a frequency conversion host, a heat recovery heat exchanger, a cooling water module, a hot water storage tank, a hot water circulation pump and a hot water control module, wherein:

[0039] The inverter host is used for cooling and heating. The heat recovery heat exchanger is installed between the condenser outlet of the inverter host and the cooling water module to recover the condensation heat.

[0040] The cooling water module includes a cooling water pump, a cooling tower and pipes, which are used to cool the heat generated by the inverter host during the refrigeration process. The cooling water module effectively reduces the operating temperature of the inverter host and extends the life of the equipment;

[0041] The hot water storage tank is used to store hot water recovered from the heat recovery heat exchanger; the hot water circulation pump is used to extract hot water from the hot water storage tank and transport it to the area or equipment that needs heating; the hot water storage tank ensures a continuous supply of hot water and improves the reliability and stability of the system; and the hot water circulation pump improves the utilization efficiency of thermal energy and reduces energy consumption.

[0042] The hot water control module includes a temperature sensor, a flow sensor and a controller, which are used to monitor the temperature and flow parameters of hot water when it flows in the system, and adjust the speed of the hot water circulation pump and the heating or cooling effect of the hot water storage tank according to actual needs. The hot water control module realizes precise control of hot water and improves the intelligence and automation level of the system.

[0043] It should be noted that the inverter host, as the core of the system, has dual functions of cooling and heating, and can automatically adjust the working mode according to the ambient temperature and user needs to achieve high efficiency and energy saving. It improves the flexibility and energy efficiency of the system and reduces operating costs. The heat recovery heat exchanger uses efficient heat exchange technology to recover the heat energy released during the condensation process and converts it into usable hot water, realizing the secondary utilization of energy and significantly improving the overall energy efficiency of the system.

[0044] In some embodiments of the present invention, an air-conditioning box is included, which includes a fresh air section, a primary filter section, a heating section, an evaporation section and a fan outlet section. The air-conditioning box is responsible for delivering the treated air into the warehouse. In the heat recovery mode, the air-conditioning box can use the recovered hot water for preheating or precooling.

[0045] In some embodiments of the present invention, a three-way regulating valve is included. The three-way regulating valve is installed between the hot water circulation pump and the heating section of the air-conditioning box to adjust the flow of hot water entering the air-conditioning box to meet the temperature control requirements of the warehouse.

[0046] In some embodiments of the present invention, an expansion water tank is included, which is connected to the cooling water module and the hot water circulation pump through pipes. The expansion water tank is used to absorb the expansion of the cooling water module and the hot water circulation pump due to temperature changes during operation, thereby protecting the system pipes and equipment from damage by pressure fluctuations and improving the safety and stability of the system.

[0047] In some embodiments of the present invention, a water replenishment module is included, which includes a water replenishment pump, a water replenishment valve and a water tank. The water replenishment module is connected to the cooling water module and the hot water circulation pump through a pipeline, and is used to replenish the water lost due to evaporation and leakage, thereby preventing the system from shutting down or malfunctioning due to insufficient water, and improving the reliability and maintenance convenience of the system.

[0048] In some embodiments of the present invention, a safety valve is installed at the highest point of the cooling water module and the hot water circulation pump, which is used to automatically release the pressure when the system pressure is too high to ensure system safety.

[0049] In some embodiments of the present invention, an exhaust valve is included, which is used to exhaust air in the cooling water module and the hot water circulation pump to prevent air blockage from affecting system performance, thereby improving system operating efficiency and reducing energy consumption and failure rate.

[0050] In some embodiments of the present invention, a communication module is included, and the communication module is used to realize communication between the system and a host computer or a remote monitoring center, so as to facilitate remote monitoring and fault diagnosis.

[0051] The system achieves efficient heat recovery and reuse through the coordinated work of multiple components, which not only improves energy utilization efficiency, but also has significant energy-saving and environmental benefits. In addition, the intelligent design of the system makes it more convenient and reliable to operate, and is suitable for various buildings and industrial applications that require efficient energy management.

[0052] Figure 1 It is a schematic flow chart of a heat energy recovery and reuse method according to an embodiment of the present invention.

[0053] like Figure 1 As shown, the heat energy recovery and reuse system includes two situations: heat energy recovery and utilization in cooling mode and heat energy recovery and utilization in heating mode, wherein:

[0054] There are three steps in cooling mode:

[0055] A1. Refrigeration cycle start-up and condensation heat recovery;

[0056] The inverter host starts the refrigeration cycle, and the refrigerant evaporates and absorbs heat in the evaporator, which reduces the air temperature in the warehouse. The gaseous refrigerant is compressed by the compressor into a high-temperature and high-pressure state and then enters the condenser. In the condenser, the refrigerant releases heat to the surrounding environment and condenses into a liquid state. At this time, the heat recovery heat exchanger starts to work. It is installed between the outlet of the inverter host condenser and the cooling water module. It uses high-efficiency heat exchange plates to transfer the condensation heat released by the refrigerant to the cooling water. The cooling water absorbs heat in the heat recovery heat exchanger and its temperature rises, and then enters the cooling water pump of the cooling water module;

[0057] A2. Cooling water circulation and heat storage;

[0058] The cooling water pump pressurizes and delivers the heated cooling water to the cooling tower. The cooling tower lowers the cooling water temperature through heat exchange with the outside air. Part of the cooled water flows back to the heat recovery heat exchanger to continue absorbing the condensation heat. The other part can be discharged or recycled according to the actual situation after meeting the heat dissipation requirements of the system. At the same time, the heated water (at this time, the temperature is relatively high but lower than the condensation temperature of the refrigerant) flowing out of the cold side of the heat recovery heat exchanger enters the hot water storage tank for storage, realizing the recovery and preliminary storage of the condensation heat.

[0059] A3. Hot water utilization and air conditioning box pre-cooling adjustment;

[0060] When the paint warehouse needs to be heated, the hot water circulation pump starts to pump out the hot water in the hot water storage tank. The hot water first passes through the hot water control module, where the temperature sensor and flow sensor monitor the temperature and flow parameters of the hot water in real time and transmit the data to the controller. The controller adjusts the speed of the hot water circulation pump according to the preset control strategy and actual needs to control the flow and pressure of the hot water. The hot water passes through the three-way regulating valve and adjusts the appropriate hot water flow according to the temperature demand of the warehouse to enter the heating section of the air-conditioning box. In the air-conditioning box, the hot water exchanges heat with the incoming fresh air to preheat the air. After the air temperature is increased, it is sent to the warehouse, realizing the reuse of heat energy. At the same time, in the evaporation section of the air-conditioning box, the cold energy generated by the variable frequency host evaporator is used to cool and dehumidify the air to ensure that the temperature and humidity of the air sent to the warehouse meet the requirements;

[0061] There are three steps in heating mode:

[0062] B1. Heating cycle start-up and heat recovery preparation;

[0063] The inverter host switches to heating mode. At this time, the refrigerant circulates in reverse, absorbs heat outdoors, and then enters the indoor unit to release heat, raising the air temperature in the warehouse. During the process of heating the air in the heating section of the air conditioner, the hot water temperature gradually decreases, and low-temperature hot water flows out from the heating section of the air conditioner.

[0064] B2. Low-temperature hot water heat recovery and storage;

[0065] The low-temperature hot water flowing out of the heating section of the air-conditioning box enters the hot side of the heat recovery heat exchanger. At this time, the cooling water (relatively low temperature) on the cold side of the heat recovery heat exchanger exchanges heat with the low-temperature hot water on the hot side. The heat of the low-temperature hot water is transferred to the cooling water, the cooling water temperature increases, and the low-temperature hot water temperature is further reduced and then flows back to the hot water storage tank. In this process, the heat energy in the low-temperature hot water discharged from the air-conditioning box is recovered, reducing the waste of heat energy.

[0066] B3. System heat balance and optimal utilization;

[0067] After the temperature of the hot water in the hot water storage tank drops, it can be pumped out and utilized again by the hot water circulation pump according to actual conditions. For example, if an area in the warehouse requires additional heating, the hot water circulation pump can transport the hot water to the cooling equipment in that area for heating. At the same time, after the cooling water absorbs the heat of the low-temperature hot water, the increased temperature cooling water can be directed to other equipment or areas that need preheating, such as preheating some pipes or equipment when starting in winter, thereby improving the overall energy utilization efficiency of the system.

[0068] In addition, this method also takes into account the pressure and water level control during system operation. The expansion water tank in the system is connected to the cooling water module and the hot water circulation pump through pipes. During the operation of the system, when the cooling water and hot water expand or contract due to temperature changes, the expansion water tank acts as a buffer to absorb the expansion and prevent the system pressure from being too high and damaging the equipment. The water replenishment module monitors the water level of cooling water and hot water in real time during the operation of the system. When the water level drops to a certain level due to evaporation, leakage, etc., the water replenishment pump starts and draws an appropriate amount of water from the water tank through the water replenishment valve to replenish the system to ensure the normal operation of the system.

[0069] It should be noted that the safety valve installed at the highest point of the cooling water module and the hot water circulation pump monitors the system pressure at all times. When the pressure exceeds the set safety value, the safety valve automatically opens to release the pressure to ensure the safe operation of the system. The exhaust valve regularly removes the air in the cooling water module and the hot water circulation pump to prevent air blockage from affecting the water flow and heat exchange efficiency. The communication module realizes the communication connection between the system and the host computer or remote monitoring center, and transmits the system operation status data (such as temperature, pressure, flow, etc.) to the monitoring center in real time, so that the operator can remotely monitor the operation of the system. Once the system fails or is abnormal, the monitoring center can receive the alarm information in time, diagnose the fault according to the data, and quickly take corresponding measures to repair it.

[0070] In cooling mode, this method can efficiently recover the condensation heat discharged by the inverter host condenser, transfer it to the cooling water, increase the cooling water temperature, and achieve effective heat recovery. The recovered heat can be stored in the hot water storage tank for subsequent heating needs, such as winter heating of the warehouse, preheating of fresh air, etc., which improves the comprehensive utilization rate of energy. According to actual tests, in the cooling season, about 20% of the condensation heat can be recovered through the heat recovery heat exchanger, saving a lot of energy costs for the enterprise. In heating mode, the heat in the low-temperature hot water discharged by the air-conditioning box can also be recovered and transferred to the cooling water for preheating, reducing the energy consumption required for hot water heating. This two-way heat recovery function enables the entire air-conditioning system to achieve energy recycling in different operating modes, reducing dependence on external energy and conforming to sustainable development.

[0071] Corresponding to the above embodiment, the present invention further provides an electronic device.

[0072] like Figure 2 The figure shows a schematic diagram of the structure of an electronic device in the present invention, where the electronic device 200 includes: a processor 201 and a memory 203. The processor 201 and the memory 203 are connected, such as through a bus 202. Optionally, the electronic device 200 may further include a transceiver 204. It should be noted that in actual applications, the transceiver 204 is not limited to one, and the structure of the electronic device 200 does not constitute a limitation on the embodiments of the present invention.

[0073] The processor 201 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor 201 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0074] The bus 202 may include a path to transmit information between the above components. The bus 202 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 202 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 2 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0075] The memory 203 is used to store a computer program corresponding to the heat recovery and reuse method of the above embodiment of the present invention, and the computer program is controlled and executed by the processor 201. The processor 201 is used to execute the computer program stored in the memory 203 to implement the content shown in the above method embodiment.

[0076] The electronic device 200 includes, but is not limited to, mobile terminals such as laptop computers, PADs (tablet computers), and fixed terminals such as desktop computers. Figure 2 The electronic device 200 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0077] The electronic device 200 of the embodiment of the present invention can convert the heat energy released by the air-conditioning variable frequency host during the condensation process into hot water, thereby realizing the secondary utilization of energy and reducing energy consumption and carbon emissions. Moreover, the recovered hot water can be used for a variety of purposes, such as heating, hot water supply, etc., thereby reducing the energy cost of the enterprise. The efficient operation and intelligent control of the system improve the energy utilization efficiency and further enhance the economic benefits.

[0078] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, recover energy, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and editable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0079] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0080] 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.

[0081] 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] 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 of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A heat recovery and reuse method, applied to a heat recovery and reuse system, characterized in that: The heat recovery and reuse system includes a frequency conversion host, a heat recovery heat exchanger, a cooling water module, a hot water storage tank, a hot water circulation pump and a hot water control module, wherein: The variable frequency host is used for cooling and heating, and the heat recovery heat exchanger is installed between the condenser outlet of the variable frequency host and the cooling water module to recover condensation heat; The cooling water module includes a cooling water pump, a cooling tower and a pipeline, which is used to cool the heat generated by the variable frequency host during the refrigeration process; The hot water storage tank is used to store hot water recovered from the heat recovery heat exchanger; the hot water circulation pump is used to extract hot water from the hot water storage tank and transport it to the area or equipment that needs to be heated; The hot water control module includes a temperature sensor, a flow sensor and a controller, which are used to monitor the temperature and flow parameters of hot water when it flows in the system, and adjust the speed of the hot water circulation pump and the heating or cooling effect of the hot water storage tank according to actual needs; The heat energy recovery and reuse method includes two cases: heat energy recovery and utilization in cooling mode and heat energy recovery and utilization in heating mode, wherein: There are three steps in cooling mode: A1. Refrigeration cycle start-up and condensation heat recovery; The inverter host starts the refrigeration cycle, and the refrigerant evaporates and absorbs heat in the evaporator, which reduces the air temperature in the warehouse. The gaseous refrigerant is compressed by the compressor into a high-temperature and high-pressure state and then enters the condenser. In the condenser, the refrigerant releases heat to the surrounding environment and condenses into a liquid state. At this time, the heat recovery heat exchanger starts to work. It is installed between the outlet of the inverter host condenser and the cooling water module. It uses high-efficiency heat exchange plates to transfer the condensation heat released by the refrigerant to the cooling water. The cooling water absorbs heat in the heat recovery heat exchanger and its temperature rises, and then enters the cooling water pump of the cooling water module; A2. Cooling water circulation and heat storage; The cooling water pump pressurizes and delivers the heated cooling water to the cooling tower. The cooling tower lowers the temperature of the cooling water through heat exchange with the outside air. Part of the cooled water flows back to the heat recovery heat exchanger to continue absorbing the condensation heat. The other part can be discharged or recycled according to the actual situation after meeting the heat dissipation requirements of the system. At the same time, the heated water flowing out of the cold side of the heat recovery heat exchanger enters the hot water storage tank for storage, realizing the recovery and preliminary storage of the condensation heat. A3. Hot water utilization and air conditioning box pre-cooling adjustment; When the paint warehouse needs to be heated, the hot water circulation pump starts to pump out the hot water in the hot water storage tank. The hot water first passes through the hot water control module, where the temperature sensor and flow sensor monitor the temperature and flow parameters of the hot water in real time and transmit the data to the controller. The controller adjusts the speed of the hot water circulation pump according to the preset control strategy and actual needs to control the flow and pressure of the hot water. The hot water passes through the three-way regulating valve and adjusts the appropriate hot water flow according to the temperature demand of the warehouse to enter the heating section of the air-conditioning box. In the air-conditioning box, the hot water exchanges heat with the incoming fresh air to preheat the air. After the air temperature is increased, it is sent to the warehouse, realizing the reuse of heat energy. At the same time, in the evaporation section of the air-conditioning box, the cold energy generated by the variable frequency host evaporator is used to cool and dehumidify the air to ensure that the temperature and humidity of the air sent to the warehouse meet the requirements; There are three steps in heating mode: B1. Heating cycle start-up and heat recovery preparation; The inverter host switches to heating mode. At this time, the refrigerant circulates in reverse, absorbs heat outdoors, and then enters the indoor unit to release heat, raising the air temperature in the warehouse. During the process of heating the air in the heating section of the air conditioner, the hot water temperature gradually decreases, and low-temperature hot water flows out from the heating section of the air conditioner. B2. Low-temperature hot water heat recovery and storage; The low-temperature hot water flowing out of the heating section of the air-conditioning box enters the hot side of the heat recovery heat exchanger. At this time, the cooling water on the cold side of the heat recovery heat exchanger exchanges heat with the low-temperature hot water on the hot side. The heat of the low-temperature hot water is transferred to the cooling water, the cooling water temperature increases, and the low-temperature hot water temperature further decreases and then flows back to the hot water storage tank; B3. System heat balance and optimal utilization; After the temperature of the hot water in the hot water storage tank drops, it can be pumped out and utilized again by the hot water circulation pump according to actual conditions. At the same time, after the cooling water absorbs the heat of the low-temperature hot water, the increased temperature cooling water can be directed to other equipment or areas that need preheating, such as preheating some pipes or equipment when starting in winter, thereby improving the overall energy utilization efficiency of the system.

2. The heat energy recovery and reuse method according to claim 1, characterized in that: The heat energy recovery and reuse system includes an air conditioning box, which includes a fresh air section, a primary filter section, a heating section, an evaporation section and a fan outlet section. The air conditioning box is responsible for delivering the treated air into the warehouse.

3. The heat energy recovery and reuse method according to claim 2, characterized in that: The heat energy recovery and reuse system comprises a three-way regulating valve, which is installed between the hot water circulation pump and the heating section of the air-conditioning box and is used to adjust the flow of hot water entering the air-conditioning box.

4. The heat energy recovery and reuse method according to claim 1, characterized in that: The heat energy recovery and reuse system includes an expansion water tank, which is connected to the cooling water module and the hot water circulation pump through pipelines. The expansion water tank is used to absorb the expansion of the cooling water module and the hot water circulation pump due to temperature changes during operation.

5. The heat energy recovery and reuse method according to claim 1, characterized in that: The heat energy recovery and reuse system includes a water replenishment module, which includes a water replenishment pump, a water replenishment valve and a water tank. The water replenishment module is connected to the cooling water module and the hot water circulation pump through a pipeline to replenish the water lost due to evaporation and leakage.

6. The heat energy recovery and reuse method according to claim 1, characterized in that: The heat energy recovery and reuse system includes a safety valve installed at the highest point of the cooling water module and the hot water circulation pump, which is used to automatically release the pressure when the system pressure is too high to ensure the safety of the system.

7. The heat energy recovery and reuse method according to claim 1, characterized in that: The heat energy recovery and reuse system comprises an exhaust valve, which is used to exhaust the air in the cooling water module and the hot water circulation pump to prevent air blocking from affecting system performance.

8. The heat energy recovery and reuse method according to claim 1, characterized in that: The heat energy recovery and reuse system includes a communication module, which is used to realize communication between the system and a host computer or a remote monitoring center, so as to facilitate remote monitoring and fault diagnosis.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory, wherein when the computer program is executed by the processor, the heat energy recovery and reuse method as claimed in claim 1 is implemented.

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