Low-carbon ventilation energy comprehensive utilization system for hotel guest rooms

Abstract

The invention provides a low-carbon ventilation energy comprehensive utilization system for hotel guest rooms, which comprises a heat exchanger, an upper computer, a hotel guest room management system for recording the number of guest rooms, a wind-solar power generation system, and a fresh air handling unit and an exhaust unit connected to each guest room, the inlet end of the fresh air handling unit is connected with the first heat exchange side of the heat exchanger, the outlet end of the exhaust unit is connected with the second heat exchange side of the heat exchanger, the fresh air handling unit and the exhaust unit are provided with clean energy access ports, and the clean energy access ports are connected with the wind-solar power generation system. A photovoltaic or wind power generation system is connected to serve as supplementary energy, so that the load of a power supply system is reduced, and energy consumption is saved; and the information of the hotel guest room management system is communicated and shared with the upper computer, and the upper computer controls the air supply amount of the fresh air handling unit and reduces the fresh air energy consumption according to the room and personnel information read by the hotel guest room management system on the premise of meeting the requirements of personnel for the fresh air amount and guaranteeing the room air quality.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation systems, in particular to an energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms. Background Art

[0002] Central air conditioning is a major energy consumer in hotels and a key area for cost reduction and efficiency improvement. According to statistics, hotel air conditioning accounts for approximately 40-60% of hotel energy consumption, and air conditioning costs account for approximately 7-15% of hotel revenue. Key factors influencing hotel heating and air conditioning energy consumption include air conditioning equipment efficiency, operating mode, indoor temperature and humidity, climate conditions, and fresh air volume.

[0003] The role of fresh air in hotel buildings is to provide clean, hygienic air, ensuring a healthy and comfortable indoor environment. However, the impact of other pollutants, such as temperature, humidity, exhaust gas, and dust, must also be considered. For example, during summer central air conditioning operation, the air temperature and humidity are generally high during the day, so 40% of the main unit's energy consumption is used to cool the fresh air.

[0004] In the central air-conditioning system, the capacity of the chilled water pump and the cooling water pump is selected according to the maximum design load of the building, and a margin is generally left. However, during actual operation, due to changes in seasons, day and night, and user load, the actual air-conditioning load is far lower than the design load most of the time, resulting in a waste of resources.

[0005] The high energy consumption of hotel air-conditioning and ventilation systems not only brings a heavy burden to enterprises, but also causes huge waste of energy in the whole society. Therefore, under the premise of ensuring the environmental requirements of guest rooms, it is of great significance to transform the hotel air-conditioning, fresh air and exhaust units and optimize the operation mode of the hotel air-conditioning system to reduce energy consumption levels.

[0006] Fresh air units bear the cooling and humidity loads of fresh air, resulting in high energy consumption. Furthermore, the fresh air volume is designed based on a 100% hotel occupancy rate, a seldom-achieved 100% occupancy rate. The fresh air volume is not adjusted accordingly, resulting in wasted energy consumption by the fresh air units. Furthermore, during the day, when temperatures are higher and light conditions are better, the cooling load on the fresh air units is higher than at night. This results in higher energy consumption and a higher electricity load for hotel buildings during the day. However, current fresh air units cannot utilize clean energy sources such as wind and solar power to supplement and reduce electricity load. Summary of the Invention

[0007] In order to solve the above problems, the purpose of the present invention is to provide an energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms.

[0008] The present invention is implemented by the following method: an energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms, comprising a heat exchanger, a host computer and a hotel room management system for recording the number of room occupants, and a wind-solar power generation system. The heat exchanger, the hotel room management system, the wind-solar power generation system and the host computer are communicatively connected, and also comprise a fresh air unit and an exhaust fan unit connected to each guest room, the inlet end of the fresh air unit is connected to the first heat exchange side of the heat exchanger, the outlet end of the exhaust fan unit is connected to the second heat exchange side of the heat exchanger, the fresh air unit and the exhaust fan unit are communicatively connected to the host computer, the fresh air unit and the exhaust fan unit are provided with a clean energy access port, and the clean energy access port is connected to the wind-solar power generation system. Preferably, it further comprises a water tank, in which a heat exchange coil is provided. The heat exchange coil is connected to the condensing end of the fresh air unit, or the heating coil is connected to the third heat exchange side of the heat exchanger.

[0009] Preferably, each of the guest rooms is provided with an air inlet and an air outlet, the air inlet is connected to the outlet end of the fresh air unit, and the inlet end of the exhaust unit is connected to the air outlet.

[0010] Preferably, a first air valve is provided at the air outlet, and a second air valve is provided at the air inlet; the first air valve, the second air valve and the host computer.

[0011] Preferably, the fresh air unit includes an evaporation end, a condensation end and an air inlet fan, and the exhaust air of the second heat exchange side is connected to the condensation end; the air at the inlet end of the fresh air unit passes through the first heat exchange side of the heat exchanger, the air inlet fan, the evaporation end and is connected to the air inlet.

[0012] Preferably, the condensing end and the evaporating end are both provided with a summer interface and a winter interface; in the winter state, the exhaust air of the second heat exchange side of the heat exchanger is connected to the winter interface of the evaporating end, and the outlet of the air intake fan is connected to the winter interface of the condensing end; in the summer state, the exhaust air of the second heat exchange side of the heat exchanger is connected to the summer interface of the condensing end, and the outlet of the air intake fan is connected to the summer interface of the evaporating end.

[0013] Preferably, it further comprises a guest room electrical appliance, and the guest room electrical appliance is communicatively connected to the host computer.

[0014] Preferably, the heat exchanger is a power heat pipe or a rotary heat recovery device.

[0015] Preferably, the outlets of the exhaust units of the guest rooms on the same floor are connected to a common exhaust duct; the guest rooms on the same floor share one or more of the fresh air units, and the inlet ends of the fresh air units on the same floor are all connected to the first heat exchange side of the same heat exchanger, and the first exhaust duct is connected to the second heat exchange side of the same heat exchanger.

[0016] The beneficial effects of the present invention are: it provides a low-carbon energy utilization system for ventilation in hotel guest rooms. Compared to existing technologies, the present invention has at least the following technical effects: 1. By providing clean energy access points for the fresh air unit and exhaust fan unit to connect to a wind and solar power generation system, it facilitates access to the photovoltaic power generation system as a supplemental energy source during periods of high load during the day or at night, thereby reducing the load on the power supply system and saving energy. Furthermore, information from the hotel guest room management system is communicated and shared with a host computer. Based on the room and occupant information read by the hotel guest room management system, the host computer controls the air volume of the fresh air unit, while meeting occupant demand for fresh air and ensuring room air quality, thereby reducing fresh air energy consumption. 2. The condensing end of the fresh air unit can also exchange heat with a tap water storage tank to produce medium-temperature (approximately 35°C) domestic hot water, thereby reducing domestic hot water heating energy consumption. 3. First and second dampers are provided at the exhaust and inlet, respectively, allowing the host computer to control the opening and closing of the exhaust vent based on occupancy information from the hotel guest room management system. Unoccupied guest rooms are not ventilated or exhausted, thereby saving energy. 4. Winter and summer interfaces are provided at the evaporation and condensation ends of the fresh air unit to facilitate adjustment of the working conditions according to seasonal changes in order to achieve maximum energy savings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a block diagram of an energy comprehensive utilization system for low-carbon ventilation in hotel guest rooms according to the present invention.

[0018] Explanation of the accompanying figures: 1. Evaporation end; 2. Air inlet fan; 3. Condensation end; 4. Heat exchanger; 5. Exhaust fan; 6. First air valve; 7. Second air valve; 8. Guest room electrical appliance; 9. Host computer; 10. Clean energy access port; 11. Water tank; 12. Heat exchange coil; 13. Hotel room management system. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] See also Figure 1A comprehensive energy utilization system for low-carbon ventilation of hotel guest rooms includes a heat exchanger 4, a host computer 9, a hotel room management system 13 for recording the number of room occupants (check-in date, number of people, etc.), and a wind-solar power generation system. The heat exchanger 4, the hotel room management system 13, the wind-solar power generation system and the host computer 9 are communicatively connected, and also include a fresh air unit and an exhaust air unit connected to each guest room. The inlet end of the fresh air unit is connected to the first heat exchange side of the heat exchanger 4, and the outlet end of the exhaust air unit is connected to the second heat exchange side of the heat exchanger 4. The fresh air unit and the exhaust air unit are communicatively connected to the host computer 9. The fresh air unit and the exhaust air unit are provided with a clean energy access port 10, and the clean energy access port 10 is connected to the wind-solar power generation system. By providing a clean energy access port 10 for the fresh air unit and the exhaust air unit to connect to the wind and solar power generation system, it is convenient to connect to the photovoltaic power generation system or wind power generation system as a supplementary energy source when the load is high during the day or at night, thereby reducing the load on the power supply system and saving energy consumption. In addition, the information of the hotel room management system 13 is communicated and shared with the host computer 9. Based on the room and personnel information read by the hotel room management system 13, the host computer 9 controls the air supply volume of the fresh air unit to reduce fresh air energy consumption, and controls the fresh air valve and exhaust fan in a coordinated manner to fully recover exhaust heat and reduce heat waste. Among them, wind power and photovoltaic power generation and power supply are mature existing technologies and will not be described in detail. The coordinated control of mains power and wind power and photovoltaic power supply is also mature existing technologies and will not be described in detail. See also Figure 1 Preferably, it further includes a water tank 11, in which a heat exchange coil 12 is provided. The heat exchange coil 12 is connected to the condensing end of the fresh air unit, or the heating coil is connected to the third heat exchange side of the heat exchanger 4. The condensing end of the fresh air unit can also exchange heat with the tap water tank 11 to prepare medium-temperature (about 35°C) domestic hot water, which can reduce the energy consumption of domestic hot water heating. The heat exchanger 4 can be a power heat pipe or a rotary heat recovery device or other high-efficiency heat exchange device to overcome the defects of the heat exchange ventilation devices on the market that mostly use paper heat recovery devices, so as to avoid short service life, easy to be affected by moisture, easy to breed bacteria, dust and other pollutants are difficult to clear, there is secondary pollution, and the quality of fresh air cannot be effectively guaranteed.

[0021] See also Figure 1 Preferably, each guest room is provided with an air inlet and an air outlet, the air inlet is connected to the outlet end of the fresh air unit, and the inlet end of the exhaust unit is connected to the air outlet. They are all connected through corresponding pipes.

[0022] See also Figure 1Preferably, a first air valve 6 is provided at the air outlet, and a second air valve 7 is provided at the air inlet; the first air valve 6, the second air valve 7 and the host computer 9 are provided at the air outlet and the air inlet respectively, so that the host computer 9 can control the opening and closing of the air outlet according to the occupancy information of the hotel room management system 13. Unoccupied rooms are not ventilated or exhausted, thereby saving energy consumption.

[0023] See also Figure 1 Preferably, the exhaust unit is composed of an exhaust fan 5, and the outlet end of the exhaust fan 5 is connected to the second heat exchange side of the heat exchanger 4.

[0024] See also Figure 1 Preferably, the fresh air unit includes an evaporation end 1, a condensation end 3, and an air inlet fan 2. The exhaust air from the second heat exchange side is connected to the condensation end 3. The air at the inlet end of the fresh air unit passes through the first heat exchange side of the heat exchanger 4, the air inlet fan 2, and the evaporation end 1 before being connected to the air inlet. The exhaust air exchanges heat with the condensation end. In summer, the exhaust air temperature is lower than the outdoor temperature, and the condensation end is cooled by the residual coolness of the exhaust air. Conversely, in winter, the exhaust air temperature is higher than the outdoor temperature, and the residual heat in the exhaust air can be utilized.

[0025] See also Figure 1 Preferably, both the condensing end 3 and the evaporating end 1 are equipped with a summer port and a winter port. In winter, the exhaust air from the second heat exchange side of the heat exchanger 4 is connected to the winter port of the evaporating end 1, and the outlet of the air intake fan 2 is connected to the winter port of the condensing end 3. In summer, the exhaust air from the second heat exchange side of the heat exchanger 4 is connected to the summer port of the condensing end 3, and the outlet of the air intake fan 2 is connected to the summer port of the evaporating end 1. Providing both winter and summer ports on the evaporating end 1 and condensing end 3 of the fresh air unit facilitates adjustment of operating conditions according to seasonal changes, thereby achieving maximum energy conservation.

[0026] See also Figure 1 Preferably, the system further includes a guest room power supply 8 (the guest room power supply is an existing device and will not be described in detail). The guest room power supply 8 is communicatively connected to the host computer 9. It is used to draw power from the guest room, so that the host computer can confirm whether the user is in the guest room and control the operation of the fresh air unit and the exhaust fan unit.

[0027] See also Figure 1Preferably, the outlets of the exhaust units of the guest rooms on the same floor are connected to an exhaust duct in common; the guest rooms on the same floor share one or more of the fresh air units, and the inlet ends of the fresh air units on the same floor are connected to the first heat exchange side of the same heat exchanger, and the first exhaust duct is connected to the second heat exchange side of the same heat exchanger. Compared with existing hotel guest rooms, the air conditioning fresh air system and the sanitary ventilation system are independently set, wherein the independent fresh air system is generally horizontally distributed, while the sanitary ventilation system is vertically distributed (the vertical distribution of bathroom exhaust means that the same position on multiple floors are all bathrooms, and the exhaust shares a vertical exhaust duct. The horizontal distribution of independent fresh air means that usually one or two fresh air units are installed on one floor of the hotel, and the fresh air delivered by the fresh air unit is to the rooms on the same floor, and generally no cross-floor air is supplied.), the present invention creates heat recovery conditions by transforming the vertical exhaust system into horizontal exhaust, and performs heat exchange with the fresh air unit on the same floor. Furthermore, the air volume for sanitary ventilation is usually higher than the fresh air volume for air conditioning, resulting in a lack of exhaust heat recovery in the hotel guest room air conditioning fresh air system. This often leads to hygienic issues such as bathroom odors due to the fresh air volume being lower than the exhaust air volume. The present invention controls the air supply volume of the fresh air unit and the exhaust volume of the exhaust unit through the host computer 9, maintaining a slightly positive pressure in the guest room and a negative pressure in the bathroom.

[0028] The present invention has the following working principle: During cooling / heating, the upper computer 9 controls the air supply volume of the fresh air unit based on the room and personnel information read by the hotel room management system 13, while meeting the personnel's demand for fresh air volume and ensuring the room air quality, thereby reducing the fresh air energy consumption, and jointly controlling the first air valve 6, the second air valve 7, and the exhaust fan 5 to fully recover the exhaust heat and reduce heat waste.

[0029] Heat exchanger 4 extracts excess coolness and heat from the exhaust fan unit (after each room's exhaust fan 5 is fed into the main duct, it first recovers energy within heat exchanger 4. At this point, the exhaust air temperature is still lower than the outdoor temperature and can be reused to cool the condensing end 3 of the fresh air unit before being discharged outdoors). Fresh air is pre-treated at the fresh air inlet (after entering from the outside, fresh air is first pre-cooled by the high-efficiency heat exchanger 4). The fresh air undergoes final treatment within the fresh air unit before being delivered to the guest rooms. This fresh air treatment method reduces energy consumption in the fresh air unit, improves its air handling capacity, and also reduces energy consumption in the air conditioning system. During the transitional season, heat exchanger 4 is deactivated (e.g., using a power-consuming heat exchanger such as a rotary heat recovery wheel or a powered heat pipe). The fresh air unit then delivers low-temperature outdoor air directly to the guest rooms, providing a natural cooling effect and reducing air conditioning system energy consumption. This also improves indoor air quality and enhances guest room comfort. The condensing end 3 of the fresh air unit can also exchange heat with the tap water storage tank 11 to produce medium-temperature (approximately 35°C) domestic hot water, reducing the energy consumption of domestic hot water heating. Clean electricity can also be provided by a wind and solar power generation system (such as photovoltaic power generation equipment or wind power generation equipment, which are existing equipment and are not described in detail or have specific protection requirements) to the fresh air unit, exhaust fan 5, first damper 6, and second vent valve, thereby reducing municipal electricity consumption.

[0030] The present invention is suitable for the comprehensive energy utilization and energy-saving transformation of hotel buildings with independent fresh air systems + independent exhaust systems, and forms a low-carbon ventilation and comprehensive energy utilization system. Through the coupling of multiple systems such as fresh air, exhaust, guest rooms, and hot water, it meets the indoor temperature and humidity requirements, improves the air quality, and greatly reduces the energy consumption of fresh air, chillers, and hot water systems. At the same time, it uses a clean energy power generation system to further achieve low-carbon goals.

[0031] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which can be mechanical connection or electrical connection, or internal communication between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0032] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0033] Finally, the above description is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0034] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be considered as the scope of protection of the present invention.

Claims

1. An energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms, comprising a heat exchanger, a host computer, a hotel room management system for recording the number of guest room occupants, and a wind-solar power generation system, wherein the heat exchanger, the hotel room management system, the wind-solar power generation system and the host computer are communicatively connected, and characterized in that: It also includes a fresh air unit and an exhaust air unit connected to each guest room, the inlet end of the fresh air unit is connected to the first heat exchange side of the heat exchanger, the outlet end of the exhaust air unit is connected to the second heat exchange side of the heat exchanger, the fresh air unit and the exhaust air unit are communicatively connected to the host computer, the fresh air unit and the exhaust air unit are provided with a clean energy access port, and the clean energy access port is connected to the wind and solar power generation system.

2. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 1 is characterized in that: It also includes a water tank, in which a heat exchange coil is arranged. The heat exchange coil is connected to the condensing end of the fresh air unit, or the heating coil is connected to the third heat exchange side of the heat exchanger.

3. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 1 is characterized in that: An air inlet and an air outlet are provided in each of the guest rooms. The air inlet is connected to the outlet end of the fresh air unit, and the inlet end of the exhaust unit is connected to the air outlet.

4. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 3 is characterized by: A first air valve is provided at the air outlet, and a second air valve is provided at the air inlet; the first air valve, the second air valve and the host computer.

5. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 3 is characterized by: The fresh air unit includes an evaporation end, a condensation end and an air inlet fan, and the exhaust air of the second heat exchange side is connected to the condensation end; the air at the inlet end of the fresh air unit passes through the first heat exchange side of the heat exchanger, the air inlet fan, and the evaporation end and is connected to the air inlet.

6. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 5 is characterized in that: The condensing end and the evaporating end are both provided with a summer interface and a winter interface; in the winter state, the exhaust air on the second heat exchange side of the heat exchanger is connected to the winter interface of the evaporating end, and the outlet of the air inlet fan is connected to the winter interface of the condensing end; in the summer state, the exhaust air on the second heat exchange side of the heat exchanger is connected to the summer interface of the condensing end, and the outlet of the air inlet fan is connected to the summer interface of the evaporating end.

7. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 1 is characterized in that: It also includes a guest room electrical appliance, which is communicatively connected to the host computer.

8. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 1 is characterized by: The heat exchanger is a power heat pipe or a rotary heat recovery device.

9. The energy comprehensive utilization system for low-carbon ventilation of hotel guest rooms according to claim 1 is characterized in that: The outlets of the exhaust fan units of the guest rooms on the same floor are commonly connected to an exhaust duct; the guest rooms on the same floor share one or more fresh air units, and the inlet ends of the fresh air units on the same floor are all connected to the first heat exchange side of the same heat exchanger, and the first exhaust duct is connected to the second heat exchange side of the same heat exchanger.

Images