Intelligent temperature, humidity and fresh air cooperative control system based on guest room state recognition

Abstract

The invention relates to the technical field of building environment intelligent control and energy saving, and discloses an intelligent temperature and humidity and fresh air cooperative control system based on guest room state recognition, which comprises a state sensing module, an environment parameter acquisition module, a guest room information module, a control decision module and an execution module, the control decision module is in communication connection with the state sensing module, the environmental parameter acquisition module and the guest room information module, and calls a preset control strategy corresponding to the state information to generate a control instruction based on the acquired guest room state information, human body existence information and environmental parameters; the working modes of the air conditioner and the fresh air equipment and the fresh air volume are adjusted according to the control instruction, the guest room state is accurately recognized through fusion judgment of the guest room information module and the state sensing module, a corresponding energy-saving control strategy is automatically switched, refined control over guest room energy consumption can be achieved, and therefore the remarkable energy-saving and consumption-reducing effects are brought to hotels.

Description

Technical Field

[0001] This invention belongs to the field of intelligent control and energy-saving technology of building environment, and more specifically, it relates to an intelligent temperature and humidity and fresh air collaborative control system based on guest room status recognition. Background Technology

[0002] With the popularization of the concept of smart hotels, the refinement and energy conservation of hotel management have become industry trends. Intelligent control of the guest room environment, especially the management of temperature, humidity and fresh air systems, is a key link to improve customer experience and reduce operating costs.

[0003] Currently, the environmental control systems for hotel rooms mainly exist in the following modes: Fixed mode control: Guest room air conditioning and fresh air systems are operated manually by guests or run in a fixed mode preset by the hotel. They cannot be dynamically adjusted according to the real-time status of the guest room (such as unoccupied or available for rent). After guests leave the hotel, the equipment is often in an ineffective high-energy-consuming state, resulting in a lot of energy waste.

[0004] Simple sensor control: Some systems use devices such as human infrared sensors to automatically turn off the air conditioner after detecting that no one is around for a period of time. However, this type of solution has obvious drawbacks: First, the sensors have blind spots and are prone to turning off the equipment due to misjudgment (such as when a guest is still and sleeping), which affects comfort; Second, it can only achieve binary control of "on / off" and cannot achieve fine adjustment of multiple levels and parameters.

[0005] Independent system operation: Temperature and humidity control systems and fresh air systems are usually independent of each other and lack a coordination mechanism. For example, when the outdoor air quality is poor (such as high PM2.5 concentration), the fresh air system may bring pollutants into the room, while the air conditioning system does not react and cannot start the internal circulation to deal with it, resulting in a decline in indoor environmental quality.

[0006] Furthermore, for unoccupied (for sale) or closed rooms due to renovation or maintenance, existing technology often adopts the simple approach of directly shutting off environmental equipment. In humid southern regions or during the rainy season, such rooms are prone to developing musty smells and mold growth due to poor ventilation and excessive humidity. This not only damages the hotel's hardware facilities but also poses a threat to the health and experience of subsequent guests. Moreover, the cost of treating mold is high.

[0007] Therefore, there is an urgent need in this field for a control system that can deeply integrate real-time status information of guest rooms and intelligently drive the coordinated operation of equipment such as air conditioning and fresh air systems, in order to maximize the energy-saving benefits of hotels while ensuring the highest level of comfort for guests and to solve the industry pain points of guest room maintenance. Summary of the Invention

[0008] This invention provides an intelligent temperature, humidity and fresh air coordinated control system based on guest room status recognition, which overcomes the above-mentioned defects in the prior art.

[0009] The purpose and effectiveness of this invention, based on guest room status recognition, for a coordinated control system of intelligent temperature, humidity, and fresh air, are achieved through the following specific technical means: A smart temperature, humidity, and fresh air coordinated control system based on guest room status recognition includes: The status sensing module is used to detect whether there are people in the guest room through at least one sensor; The environmental parameter acquisition module is used to monitor the temperature, humidity, and air quality parameters in the guest rooms in real time. The guest room information module is used to obtain the status information of guest rooms from the hotel management system. The status information includes the status of the guest room as sold and occupied, sold and unoccupied, available for sale, closed or under maintenance. The control decision module is communicatively connected to the state perception module, the environmental parameter acquisition module, and the guest room information module. It is used to generate control commands by calling a preset control strategy corresponding to the state information based on the acquired guest room state information, human presence information, and environmental parameters. An execution module, which is communicatively connected to the control decision module, is used to adjust the working mode and fresh air volume of the air conditioner and fresh air equipment according to the control command. The control decision module is configured to: when the guest room is occupied and sold, control the air conditioner to operate based on the difference between the real-time indoor temperature and the first set temperature, dynamically adjust the fresh air volume based on the CO2 concentration, and control the fresh air filtration or circulation mode based on the PM2.5 concentration; when the guest room is unoccupied, awaiting sale, or closed / under maintenance, invoke a second set temperature value and a maintenance fresh air volume that are different from the occupied and sold status.

[0010] In a further technical solution, the status perception module includes one or more of the following: a human infrared sensor, a microwave sensor, a door magnetic sensor, and a smart door lock.

[0011] A further technical solution is that the control decision module has a more relaxed temperature control range and a lower maintenance fresh air volume for the sold-out unoccupied, pending-sale, closed, or maintenance states, which are different from the sold-out occupied state.

[0012] In a further technical solution, the control decision module is configured to execute a dehumidification strategy to control the humidity below the anti-mold threshold when the guest room is in a closed or under maintenance state.

[0013] In a further technical solution, the control decision module is configured with the following strategy for dynamically adjusting the fresh air volume: when the CO2 concentration is <800ppm, the fresh air volume is 30m³ / h; when the CO2 concentration is ≥800ppm, the fresh air volume = ((CO2 concentration - 800) / 50 + 2) * 30 m³ / h.

[0014] In a further technical solution, the control decision module is configured to control the fresh air as follows: when PM2.5 < 35 μg / m³, the execution module controls the fresh air unit to not filter; when PM2.5 is between 35-75 μg / m³, the fresh air unit starts filtering; when PM2.5 > 75 μg / m³ and CO2 ≤ 800 ppm, the fresh air unit switches to internal circulation.

[0015] In a further technical solution, the control decision module is configured with the following strategy regarding the air conditioning fan speed: high fan speed when the temperature difference is ≥2℃, medium fan speed when the temperature difference is 1℃ < 2℃, and low fan speed when the temperature difference is 0 < 1℃.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention, through the fusion of a guest room information module and a status perception module, can accurately identify states such as "sold out and unoccupied," "awaiting sale," and "closed / under maintenance," and automatically switch to the corresponding energy-saving control strategy, such as relaxing the temperature and humidity control range and significantly reducing the fresh air volume. Compared with the traditional mode of continuous high-power operation or simple shutdown of hotel guest room environmental equipment, this invention can achieve refined management of guest room energy consumption, thereby bringing significant energy-saving and consumption-reducing effects to hotels.

[0017] For rooms in the "occupied" state, this invention ensures guests always enjoy a comfortable, fresh, and healthy environment through dynamic temperature adjustment, CO2 concentration-based fresh air volume adjustment, and PM2.5 concentration-based air filtration and internal circulation switching mechanisms. This avoids the discomfort caused by the sluggish response or lack of coordination of traditional systems. For long-term guest rooms such as those under "closed / under maintenance," this invention sets up a humidity control strategy centered on mold prevention. By forcibly activating the dehumidification mode and strictly controlling the humidity below a threshold (e.g., 50%), it fundamentally eliminates mold caused by dampness, saving on the high cost of mold removal and renovation later. This invention breaks the traditional mode of independent operation of air conditioning and fresh air systems. Through a unified control decision module, it makes comprehensive decisions based on multi-source data, realizing intelligent linkage and collaborative optimization between various environmental devices, improving the intelligence level and operating efficiency of the entire system, and reducing the need for manual intervention. Attached Figure Description

[0018] Figure 1 This is a system architecture block diagram of the present invention; Figure 2 This is a flowchart of the guest room status recognition process in this invention; Figure 3 This is a flowchart of the air conditioning process in this invention; Figure 4 This is a flowchart of the fresh air system operation process in this invention. Detailed Implementation

[0019] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0020] This invention provides an embodiment of an intelligent temperature, humidity, and fresh air coordinated control system based on guest room status recognition, see reference. Figure 1 - Figure 4 It includes: a status sensing module, used to detect whether there is someone in the guest room through at least one sensor; The environmental parameter acquisition module is used to monitor the temperature, humidity, and air quality parameters in the guest rooms in real time. The guest room information module is used to obtain the status information of guest rooms from the hotel management system. The status information includes whether the guest room is occupied, unoccupied, available for sale, closed, or under maintenance. The control decision module communicates with the state perception module, the environmental parameter acquisition module, and the guest room information module. It is used to generate control commands by calling the preset control strategy corresponding to the state information based on the acquired guest room state information, human presence information, and environmental parameters. The execution module communicates with the control decision module and is used to adjust the working mode and fresh air volume of the air conditioner and fresh air equipment according to control commands. The control decision module is configured to: when the guest room status is sold and occupied, control the air conditioning operation based on the difference between the real-time indoor temperature and the first set temperature, dynamically adjust the fresh air volume based on the CO2 concentration, and control the fresh air filtration or circulation mode based on the PM2.5 concentration; when the guest room status is sold and unoccupied, pending sale, or closed / under maintenance, call the second set temperature value and the maintenance fresh air volume, which are different from the sold and occupied status.

[0021] In this embodiment, the environmental parameter acquisition module is used to monitor the temperature, humidity, and air quality parameters in the guest room in real time. It includes a temperature and humidity sensor for real-time acquisition of temperature and humidity data in the guest room; a CO2 concentration sensor for real-time monitoring of indoor carbon dioxide concentration, which is a key parameter for assessing air freshness and determining the fresh air volume; and a PM2.5 sensor for real-time monitoring of the concentration of fine particulate matter in indoor air, which is the basis for determining whether to activate the filtration or recirculation function.

[0022] The guest room information module is used to obtain guest room status information from the hotel management system (PMS). (See also...) Figure 2The status information includes at least the status of "sold and occupied", "sold and unoccupied", "awaiting sale", "closed" or "under maintenance". This module connects to the PMS database through a software interface to synchronize room reservation, check-in, cleaning, maintenance and other status data in real time, providing global context information for control decisions.

[0023] The execution module is communicatively connected to the control decision module, and is used to receive the control commands generated above and drive the corresponding hardware devices to perform actions. These hardware devices include: Air conditioner: Adjust its on / off switch, cooling / heating / dehumidification mode, and fan speed; The fresh air handling unit adjusts its fan speed, switches the air valve channel (internal circulation / external circulation), and controls the start and stop of the filter; You can also choose to use a separate humidifier or dehumidifier.

[0024] Preferably, the status sensing module includes one or more of the following: human infrared sensor, microwave sensor, door magnetic sensor, and smart door lock.

[0025] In this embodiment, refer to Figure 1 Human infrared (PIR) sensors detect infrared radiation of specific wavelengths emitted by the human body to determine the presence of a stationary human body over a large area. Microwave sensors emit microwaves and analyze the reflected waves, detecting subtle movements (such as breathing or turning over). They have strong penetrating power and complement PIR sensors, reducing false negatives. Door magnetic sensors are installed on doors and door frames to detect the opening and closing status of doors; an open door usually indicates someone is entering or exiting. The status of the smart lock (locked, unlocked, card swipe record) is strong evidence of whether a room is occupied. The signals from these sensors are processed comprehensively (for example, when the lock displays "locked" and the microwave sensor detects subtle movements, it can be confirmed as "occupied"), and the result is sent to the control decision module.

[0026] Preferably, the control decision module has a more relaxed temperature control range and a lower maintenance fresh air volume for the sold unoccupied, pending sale, and closed / maintenance states, which are different from the sold occupied state.

[0027] Preferably, the control decision module is configured to execute a dehumidification strategy to keep the humidity below the anti-mold threshold when the guest room is closed or under maintenance.

[0028] Preferably, the control decision module is configured with the following strategy for dynamically adjusting the fresh air volume: when the CO2 concentration is <800ppm, the fresh air volume is 30m³ / h; when the CO2 concentration is ≥800ppm, the fresh air volume = ((CO2 concentration - 800) / 50 + 2) * 30m³ / h.

[0029] Preferably, the control decision module is configured to control the fresh air as follows: when PM2.5 < 35 μg / m³, the execution module controls the fresh air unit to not filter; when PM2.5 is between 35-75 μg / m³, the fresh air unit starts filtering; when PM2.5 > 75 μg / m³ and CO2 ≤ 800 ppm, the fresh air unit switches to internal circulation.

[0030] Preferably, the control decision module is configured with the following strategy regarding the air conditioning fan speed: high fan speed when the temperature difference is ≥2℃, medium fan speed when the temperature difference is 1℃ < 2℃, and low fan speed when the temperature difference is 0 < 1℃.

[0031] In practice: The control decision module, as the core of this system, communicates with all the above modules. It is used to generate control commands based on the acquired guest room status information, human presence information, and environmental parameters, and invokes preset control strategies. The control decision module is configured to execute the following control methods: Step 1, Data Acquisition and Status Judgment: Real-time data is continuously acquired from various sensors and the PMS system. The control decision module first performs a fusion judgment based on the PMS status and sensor signals to accurately determine whether the guest room is currently in a state of being occupied, unoccupied, awaiting sale, closed, or under maintenance.

[0032] Step 2, invoke the preset strategy: Based on the determined state, invoke the preset temperature and humidity target values ​​and basic fresh air volume for that state. The specific strategy is as follows: Status: Someone is here Temperature and humidity settings: 24℃~26℃ (summer) / 22℃~24℃ (winter), humidity ≤60%.

[0033] Fresh air volume: dynamically adjusted according to CO2 concentration (≥30m³ / h·person).

[0034] Unmanned status: Temperature and humidity settings: Increase by 28℃ in summer and decrease by 20℃ in winter; humidity can be set to ≤80%.

[0035] Fresh air volume: Reduce to the maintenance level (10m³ / h).

[0036] Status: Available for sale Temperature and humidity settings: 30℃ (summer) / 16℃ (winter), humidity ≤80%.

[0037] Fresh air volume: 8m³ / h.

[0038] Closed / Maintenance Status: To prevent mold, the air conditioner is set to dehumidification mode, with humidity controlled at ≤50%.

[0039] Turn on the lowest fresh air volume (5m³ / h).

[0040] Under the various guest room conditions described above, the hotel can adjust the set temperature, humidity, and fresh air volume values ​​according to its own actual situation.

[0041] Step 3: Generate and output collaborative control instructions (covering detailed logic for air conditioning and fresh air systems), the specific logic of which is as follows: For information on air conditioning temperature control, please refer to the following: Figure 3 : For the statuses "Sold and Occupied", "Sold and Occupied", and "Awaiting Sale": Calculate the difference between the real-time temperature and the set temperature in step 2 (|ΔT|). If |ΔT| ≥ 2°C: Generate a command to control the air conditioner to cool or heat at a high fan speed; If 1°C < |ΔT| < 2°C: Generate a command to control the air conditioner to operate at the medium fan speed; If 0 < |ΔT| ≤ 1°C: Generate a command to control the air conditioner to operate at a low fan speed; If |ΔT| = 0, the set temperature has been reached: determine if the current humidity is greater than the set humidity value for this state. If it is greater, generate a command to switch the air conditioner to dehumidification mode; otherwise, generate a command to pause the air conditioner's operation.

[0042] For the "Closed / Under Maintenance" status: Ignore temperature and only check humidity. If humidity > set value: generate command to start air conditioner dehumidification mode; otherwise, generate command to pause air conditioner operation.

[0043] The control logic for the fresh air system is as follows; please refer to [link / reference]. Figure 4 : When the room status is "Sold and Occupied", the air volume is dynamically calculated based on the CO2 concentration: If the CO2 concentration is ≤ 800ppm: fresh air volume = 30 m³ / h.

[0044] If the CO2 concentration is > 800ppm: Fresh air volume = ((CO2 concentration - 800) / 50 + 2) * 30 m³ / h, until the maximum air volume of the fresh air unit is reached.

[0045] If PM2.5 < 35 μg / m³: Instruction generated, the fresh air system will not activate the filtration function.

[0046] If 35 ≤ PM2.5 ≤ 75 μg / m³: Generate instruction to start the filtration function.

[0047] If PM2.5 > 75 μg / m³ and CO2 concentration ≤ 800ppm: a command is generated to switch to internal circulation mode. In internal circulation mode, if the CO2 concentration rises to > 800ppm, a command is immediately generated to switch back to fresh air external circulation mode.

[0048] When the room status is "Sold Unoccupied", "Available for Sale", "Closed" or "Under Maintenance": Without dynamic adjustment, it directly generates instructions to operate the fresh air system at a fixed air volume preset for each state (e.g., 10, 8, 5, 5 m³ / h).

[0049] To illustrate the working process of the system of the present invention in detail, four embodiments are provided below, which correspond to the working scenarios of the system under different states: Example 1: Collaborative Control in a Sold-Out, Occupied State When a guest is registered by the PMS and the guest room is detected by infrared, microwave, door magnet, door lock, etc., the sensor detects that the room temperature is 30 degrees Celsius (in summer, the preset target temperature for cooling is 26 degrees Celsius), the CO2 concentration reaches 820 ppm (the preset CO2 concentration value is 800 ppm), and the PM2.5 value is 50 μg / m³ (the preset PM2.5 value is 35 μg / m³).

[0050] At this point, the control decision module immediately generates control commands: For air conditioners: Because the temperature difference ΔT = 4℃ > 2℃, the air conditioner is instructed to start the high-fan cooling mode.

[0051] For fresh air: According to the formula, fresh air volume = ((820-800) / 50 + 2) * 30 = 60 m³ / h. Simultaneously, since the PM2.5 value is between 35 and 75 μg / m³, the fresh air unit is instructed to activate its filtration function.

[0052] The execution module drives the equipment to work. After a period of time, the room temperature drops to 27℃, the CO2 concentration drops to 700ppm, and the PM2.5 value drops to 30μg / m³. The control decision module then generates new instructions: For air conditioners: ΔT=1℃, instruct the air conditioner to switch to cooling low fan mode.

[0053] For fresh air: CO2 concentration is below 800ppm, the instruction is to reduce the fresh air volume to the basic air volume of 30 m³ / h; PM2.5 is below 35μg / m³, the instruction is to turn off the filtration function.

[0054] Example 2: Energy-saving control in unattended operation after sale When a guest temporarily leaves the room, the status perception module detects that no one is there, but the PMS shows that the room has not been checked out. The sensor detects that the temperature in the room is 26℃ (the default temperature for the "sold out and unoccupied" status in summer is 28℃).

[0055] The control decision module determines that the current temperature (26℃) is lower than the set temperature (28℃), and therefore generates a command to stop the air conditioner from cooling.

[0056] Meanwhile, if the room humidity is detected to be greater than 80% (the set value), a command will be generated to start the air conditioner's dehumidification mode.

[0057] The fresh air system then generates an instruction to reduce the airflow to the maintenance level of 10 m³ / h.

[0058] Example 3: Basic maintenance in the pre-sale state The PMS displays the guest room as "available for sale," and the sensor detects an indoor temperature of 28℃ (the default temperature for this status is 30℃ in summer). The control decision module generates a command to pause the air conditioning cooling operation. If the humidity is greater than 80%, a command is generated to activate the air conditioning dehumidification mode. The fresh air system generates a command to operate at an airflow rate of 8 m³ / h.

[0059] Example 4: Anti-mold protection under closed or maintenance conditions When a guest room is set to closed or under maintenance, the system continuously monitors humidity. The core logic of the control decision module is mold prevention. Whenever the humidity exceeds 50%, a command is generated to activate the air conditioning dehumidification mode until the humidity drops below the target value. The fresh air system generates a command to operate at a minimum airflow of 5 m³ / h, or to temporarily shut down in extremely humid conditions. In this mode, the system effectively prevents mold growth in guest rooms caused by prolonged closure.

[0060] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An intelligent temperature and humidity and fresh air coordinated control system based on room state recognition, characterized in that, The application relates to a hotel room control system, comprising: a state sensing module for detecting whether a room is occupied by at least one sensor; an environmental parameter acquisition module for real-time monitoring of temperature, humidity and air quality parameters in the room; a room information module for obtaining state information of the room from a hotel management system, the state information including sold and occupied, sold and unoccupied, to be sold, closed or under maintenance; a control decision module in communication connection with the state sensing module, the environmental parameter acquisition module and the room information module, for generating a control instruction based on the obtained state information of the room, human presence information and environmental parameters, by calling a preset control strategy corresponding to the state information; an execution module in communication connection with the control decision module, for adjusting the working mode of the air conditioner and the fresh air equipment and the fresh air volume according to the control instruction; the control decision module is configured to: when the room state is sold and occupied, control the air conditioner to run according to the difference between the indoor real-time temperature and a first set temperature, dynamically adjust the fresh air volume according to the CO2 concentration and control the fresh air filtering or circulating mode according to the PM2.5 concentration; when the room state is sold and unoccupied, to be sold or closed / maintenance, a second set temperature value and a maintenance fresh air volume different from those in the sold and occupied state are called.

2. The intelligent temperature and humidity and fresh air coordinated control system based on room status identification according to claim 1, characterized in that: The state sensing module comprises one or more of a human body infrared sensor, a microwave sensor, a door magnetic sensor and a smart door lock. 3.The intelligent temperature and humidity and fresh air coordinated control system based on room status recognition of claim 1, characterized in that: The control decision module sets a wider temperature control range and a lower maintenance fresh air volume for the sold and unoccupied, to be sold, closed or maintenance state than those for the sold and occupied state.

4. The intelligent temperature and humidity and fresh air coordinated control system based on room status identification according to claim 1, characterized in that, The control decision module is configured to execute a dehumidification strategy to control the humidity below a mildew threshold when the room state is closed or under maintenance.

5. The intelligent temperature and humidity and fresh air coordinated control system based on room status identification according to claim 1, characterized in that, The control decision module is configured to dynamically adjust the fresh air volume as follows: when the CO2 concentration is less than 800 ppm, the fresh air volume is 30 m³ / h; when the CO2 concentration is greater than or equal to 800 ppm, the fresh air volume = ((CO2 concentration - 800) / 50 + 2) * 30 m³ / h.

6. The intelligent temperature and humidity and fresh air coordinated control system based on room status identification according to claim 1, characterized in that, The control decision module is configured to control the fresh air as follows: when the PM2.5 is less than 35 mu / g / m³, the execution module controls the fresh air unit to not filter; when the PM2.5 is between 35 mu / g / m³ and 75 mu / g / m³, the fresh air unit starts filtering; when the PM2.5 is greater than 75 mu / g / m³ and the CO2 is less than or equal to 800 ppm, the fresh air unit switches to internal circulation.

7. The intelligent temperature and humidity and fresh air coordinated control system based on room status recognition of claim 1, characterized in that, The control decision module is configured to control the air conditioner wind as follows: when the temperature difference is greater than or equal to 2 DEG C, high wind runs; when the temperature difference is between 1 DEG C and 2 DEG C, medium wind runs; when the temperature difference is between 0 and 1 DEG C, low wind runs.

Images