Hotel refrigerating machine room energy-saving control system considering personnel occupancy rate

Abstract

The utility model belongs to the technical field of air-conditioning energy conservation, and relates to a hotel refrigerating machine room energy-saving control system considering the occupancy rate, which comprises a signal input module, a controller module and a signal output module, the signal input module comprises a hotel personnel real-time occupancy rate sub-module, an air conditioner terminal communication sub-module, a refrigerating machine room communication sub-module and a sensor monitoring sub-module, and the controller module comprises a refrigerating machine room energy-saving control sub-module. The hotel personnel real-time occupancy rate sub-module, the air conditioner terminal communication sub-module, the refrigerating machine room communication sub-module and the sensor monitoring sub-module are electrically connected to the refrigerating machine room energy-saving control sub-module respectively; according to the utility model, the information of the real-time occupancy rate of personnel is fed back to the refrigerating machine room energy-saving control sub-module, and when the occupancy rate of a hotel is suddenly increased / suddenly decreased compared with the historical same period, the refrigerating capacity of the refrigerating machine room is adjusted and increased / decreased in advance in a larger range, so that the refrigerating demand of the air conditioner terminal is quickly responded, and energy conservation is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of air-conditioning energy saving, and relates to an energy-saving control system for a hotel refrigeration room taking into account the occupancy rate of personnel. Background Art

[0002] The current energy-saving control system of the refrigeration room is mainly divided into three modules: signal input module, controller module and signal output module.

[0003] First, the signal input module: The signal input module generally has a sensor monitoring module and a refrigeration equipment wireless communication module. Among them, the sensor monitoring module is responsible for collecting various sensor information, such as: the monitoring component 300 in the utility model CN202222254522.7 (the utility model CN202221328957.5 is called the sensor acquisition module 3, and the utility model CN202221135099.2 is called the signal input module above the central processor): the supply and return temperature and flow of chilled water, the supply and return temperature and flow of cooling water. In addition, the sensor acquisition module 3 of the utility model CN202221328957.5 has more chilled water supply pressure, cooling water supply pressure and outdoor temperature and humidity sensors than the monitoring component 300 of the utility model CN202222254522.7. The refrigeration equipment wireless communication module is responsible for collecting relevant operating status information of refrigeration-related equipment. For example, in the utility model CN202222254522.7, the smart meter 200 will transmit the real-time electric power of the chiller. In the utility model CN202221328957.5, the wireless communication module of the refrigeration equipment includes: a magnetic levitation chiller communication module 5, a smart meter communication module 6, and a frequency converter communication module 7. The magnetic levitation chiller communication module 5 is responsible for the start and stop control, load rate control, and status monitoring of the magnetic levitation unit. The smart meter communication module 6 includes a magnetic levitation unit smart meter, a refrigeration pump smart meter, a cooling pump refrigeration meter, and a cooling tower smart meter, which are used to transmit the power consumption of these devices. Frequency converter communication module 7 communicates with the refrigeration pump frequency converter, the cooling pump frequency converter, and the cooling tower frequency converter. The utility model CN202221135099.2 does not have it. The utility model CN201921866731.9 only has cold source room communication, and returns the supply and return water temperature of chilled water. However, utility model CN202222254522.7 and utility model CN201921866731.9 also have a terminal air conditioner communication module. Utility model CN202222254522.7 is an air conditioning system control panel: transmits indoor temperature and the cooling temperature set by the user, that is, grasps the cooling situation of the air conditioner terminal in the room. Utility model CN201921866731.9 is a terminal air conditioner communication module: transmits indoor temperature and humidity, air supply temperature and humidity, and surface cooling valve opening.

[0004] Secondly, the controller module: The controller module is mainly used to obtain low-energy equipment operating parameters through calculation based on the collected information, and then feed back to the equipment in the refrigeration room (refrigeration machine, pump, cooling tower). The control module 100 in the utility model CN202222254522.7,

[0043] points out that the energy consumption is judged in combination with the monitoring data, and control instructions are issued according to the operating status of the unit to reduce the operating load. Control information can also be written manually. The main control module 1 in the utility model CN202221328957.5,

[0026] points out that the chiller data model, the freezing pump data model, the cooling pump data model and the cooling tower data model are established through the main control module. Based on the model, the optimization calculation is performed through the actively loaded PID, and the overall comprehensive energy efficiency ratio of the chiller room is taken as the goal to calculate the optimal temperature difference set point of the chilled water, the optimal temperature difference set point of the cooling water and the optimal temperature approximation set point of the cooling tower. The central processor in the utility model CN202221135099.2 receives the chiller outlet water temperature and cooling tower outlet water temperature transmitted by the temperature controller, the most unfavorable end loop pressure difference of chilled water transmitted by the pressure difference controller, and the cooling water supply and return water temperature difference data transmitted by the temperature difference controller, and generates and transmits the control signal for adjusting the chiller outlet water temperature, cooling tower outlet water temperature, the most unfavorable end loop pressure difference of chilled water, and the cooling water supply and return water temperature difference to each chiller and each inverter. Each inverter is respectively connected to the chilled water pump, cooling water pump, and cooling tower to collect and adjust the operating frequency of the chiller, chilled water pump, cooling water pump, and cooling tower motor. Thereby adjusting the chiller outlet water temperature, cooling tower outlet water temperature, the most unfavorable end loop pressure difference of chilled water, and the cooling water supply and return water temperature difference and other parameters. The utility model CN201921866731.9 does not describe the controller in detail.

[0005] Third, signal output module: The output module is mainly used for the operating parameters of refrigeration equipment. The instruction output unit in utility model CN202222254522.7 is used to control the operating mode of multiple chillers according to control instructions. Utility model CN202221328957.5 outputs dynamic adjustment control of chiller chilled water outlet temperature, chiller addition and subtraction machine control, freezing pump frequency adjustment control, cooling pump frequency adjustment control, cooling tower frequency adjustment control and pressure difference bypass valve opening adjustment control. Utility model CN202221135099.2 transmits control signals of chiller outlet water temperature, cooling tower outlet water temperature, chilled water most unfavorable end loop pressure difference, and cooling water supply and return water temperature difference to each chiller and each inverter. Utility model CN201921866731.9 outputs the outlet water temperature of the chiller.

[0006] However, the prior art has the following defects: the real-time occupancy rate of hotel buildings is volatile and random, which has an impact on the energy-saving control of the refrigeration room in the prior art, making it impossible for the energy-saving control of the refrigeration room in the prior art to meet the needs of energy consumption adjustment in real time, resulting in excessive energy consumption during idle time and insufficient cooling and heating during busy time.

[0007] Utility model CN202222254522.7: The signal input sensor module does not have an outdoor temperature and humidity sensor. The temperature and humidity of the outdoor air are very important. They have a direct impact on the outlet water temperature of the cooling tower and the temperature and humidity of the fresh air at the end of the air conditioner, and determine the setting of the chilled water outlet temperature of the chiller. In addition, energy-saving control is performed on the chiller, but energy-saving control is not performed on the frequency of other auxiliary equipment such as the freezing pump, cooling pump, and cooling tower, that is, there is a lack of frequency conversion control.

[0008] Utility model CN202221328957.5 lacks communication equipment at the air conditioning terminal. The air supply temperature and humidity at the air conditioning terminal and the indoor temperature and humidity information are fed back to the cold source control center, which helps to formulate an appropriate chiller water supply temperature under the premise of energy saving to prevent the temperature and humidity processing requirements of the air conditioning terminal from being unable to be met.

[0009] Utility model CN202221135099.2, similar to utility model CN202222254522.7, lacks the input of temperature and humidity sensor signals of outdoor air.

[0010] Utility model CN201921866731.9 is similar to utility model CN202222254522.7, except that it only controls the chiller.

[0011] Therefore, there is an urgent need for a controller that can consider transmitting the real-time occupancy rate to the refrigeration room, and combine other information for comprehensive judgment and energy-saving calculation, so that the hotel building can have greater energy-saving potential to solve the above technical problems. Utility Model Content

[0012] The technical solution adopted by the utility model to solve the technical problem is: an energy-saving control system for a hotel refrigeration room taking into account the occupancy rate of personnel, including: a signal input module, a controller module, and a signal output module. The signal input module includes: a hotel staff real-time occupancy rate submodule, an air-conditioning terminal communication submodule, a refrigeration room communication submodule, and a sensor monitoring submodule. The controller module includes: a refrigeration room energy-saving control submodule;

[0013] The hotel staff real-time occupancy rate submodule is used to collect the real-time staff occupancy rate information of the hotel management system;

[0014] The air conditioning terminal communication submodule is used to collect the temperature and humidity information of the hotel room, set the temperature and humidity information, and the air supply temperature and humidity information of the air conditioning terminal;

[0015] The refrigeration room communication submodule is used to collect and feedback the operation information of the refrigeration equipment in the refrigeration room;

[0016] The sensor monitoring submodule is used to collect sensing information from each sensor;

[0017] The refrigeration room energy-saving control submodule is used to optimize the refrigeration equipment operating parameters of the overall power consumption and energy saving of the refrigeration equipment in the current refrigeration room with the goal of minimizing the overall energy consumption of the current refrigeration room, and to feedback and control the operation of the refrigeration equipment in the refrigeration room through the refrigeration room communication submodule;

[0018] The hotel staff real-time occupancy rate submodule, the air conditioning terminal communication submodule, the refrigeration room communication submodule, and the sensor monitoring submodule are respectively electrically connected to the refrigeration room energy-saving control submodule;

[0019] Refrigeration equipment includes: chillers, refrigeration water pumps, cooling water pumps, and cooling towers.

[0020] Preferably, the sensor monitoring submodule includes: a chilled water supply temperature sensor, a chilled water return temperature sensor, a cooling water supply temperature sensor, a cooling water return temperature sensor, a chilled water flow meter, a cooling water flow meter, a chilled water supply pressure sensor, a chilled water return pressure sensor, and an outdoor air temperature and humidity sensor.

[0021] Preferably, the electrical connection modes in which the hotel staff real-time occupancy rate submodule, the air conditioning terminal communication submodule, the refrigeration room communication submodule, and the sensor monitoring submodule are respectively electrically connected to the refrigeration room energy-saving control submodule include: wired communication connection and wireless communication connection.

[0022] Preferably, the chiller is provided with a chiller submodule, and the chiller submodule is used to collect the real-time cooling capacity, real-time electric power, load rate, and current start and stop status of the chiller;

[0023] The chilled water pump is provided with a chilled water pump submodule, which is used to collect the real-time electric power, flow rate and frequency of the chilled water pump;

[0024] The cooling water pump is provided with a cooling water pump submodule, which is used to collect the real-time electric power, flow rate and frequency of the cooling water pump;

[0025] The cooling tower is equipped with a cooling tower submodule, which is used to collect the real-time power, flow rate and frequency of the cooling tower fan;

[0026] The chiller submodule, the refrigerated water pump submodule, the cooling water pump submodule, and the cooling tower submodule are electrically connected to the refrigeration room communication submodule respectively.

[0027] Preferably, the energy-saving control system is also provided with a display screen, which is used to display the current operating status of the refrigeration equipment, the hotel occupancy rate and the sensing information collected by each sensor, and the display screen is electrically connected to the refrigeration room energy-saving control submodule.

[0028] The beneficial effects of the utility model are:

[0029] 1. The utility model feeds back the information of the real-time occupancy rate of the personnel to the energy-saving control submodule of the refrigeration room. Since the control of the refrigeration equipment in the refrigeration room is not carried out all the time, but the feedback time step of the real-time occupancy rate of the personnel is definitely smaller than the time step of the refrigeration equipment control, when the occupancy rate of the hotel increases / decreases sharply compared with the same period in history, the refrigeration capacity of the refrigeration room is adjusted in a large range in advance to increase / decrease the refrigeration capacity, thereby quickly responding to the refrigeration demand of the air-conditioning terminal and achieving energy saving.

[0030] 2. When collecting various types of information, the utility model not only controls the energy saving of the refrigeration room, but also collects information on the air-conditioning terminal in addition to the information of the refrigeration equipment: air temperature and humidity, supply air temperature and humidity, and temperature and humidity set by the guests, and dynamically adjusts the chilled water outlet temperature of the chiller, thereby improving the energy saving rate of the refrigeration system.

[0031] 3. The utility model not only controls the chiller, but also controls other refrigeration equipment such as the chilled water pump, cooling water pump, and cooling tower. With the overall energy consumption as the goal, the entire machine room is group controlled to achieve energy saving of the refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a control system diagram of an energy-saving control system for a hotel refrigeration room taking into account the occupancy rate;

[0033] Figure 2 This is a diagram of the air conditioner terminal communication module of the utility model;

[0034] Figure 3 This is a sensor monitoring module diagram of the utility model;

[0035] Figure 4 It is a schematic diagram of a refrigeration room sensor and a communication module of the utility model. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the relevant technologies in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] refer to Figures 1 to 4 The utility model is an energy-saving control system designed mainly for the refrigeration room of the hotel building. It mainly includes three parts: a signal input module, a controller module, and a signal output module.

[0038] like Figure 1 As shown, the signal input module is the real-time occupancy rate information of the hotel management system, the air-conditioning terminal communication submodule A2, the refrigeration room communication submodule A3 and the sensor monitoring submodule A4, the air-conditioning terminal communication submodule A2 and the refrigeration room communication submodule A3 are both wireless communication, while the sensor monitoring submodule is wired communication connection. Figure 2 As shown, the air conditioning terminal communication submodule A2 collects the temperature and humidity of the typical room, the set temperature and humidity of the typical room, and the air supply temperature and humidity of the air conditioning terminal of the typical room, and transmits them to the refrigeration room energy-saving control submodule A1; Figure 4 As shown, the refrigeration room communication submodule A3 collects and feeds back the operating information of the main refrigeration equipment in the refrigeration room: chillers, refrigeration pumps, cooling pumps and cooling towers. The information of the chiller submodule T1 mainly includes: the real-time cooling capacity, real-time electrical power, load rate, and current start and stop status of the chiller; the information of the refrigeration pump submodule T2 mainly includes: the real-time electrical power, flow rate and frequency of the refrigeration pump; the information of the cooling pump submodule T3 mainly includes: the real-time electrical power, flow rate and frequency of the cooling pump; the information of the cooling tower submodule T4 mainly includes: the real-time electrical power, flow rate and frequency of the cooling tower fan. In addition, as Figure 3 and 4 As shown, the sensor monitoring submodule A4 includes: a chilled water supply temperature sensor C1, a chilled water return temperature sensor C2, a cooling water supply temperature sensor C3, a cooling water return temperature sensor C4, a chilled water flow meter C5, a cooling water flow meter C6, a chilled water supply pressure sensor C7, a chilled water return pressure sensor C8, and an outdoor air temperature and humidity sensor C9.

[0039] In addition, this embodiment can also be combined with an optimization algorithm, such as Figure 1As shown, the controller in the refrigeration room energy-saving control submodule A1 is based on the overall energy consumption model of the refrigeration room affected by the energy consumption model of the chiller, the energy consumption model of the freezing pump, the energy consumption model of the cooling pump, the energy consumption model of the cooling tower and the energy consumption model of the occupancy rate of the staff, which is established based on the historical operation data. According to the information transmitted in real time by the hotel's real-time occupancy rate information A5, the air-conditioning terminal communication submodule A2, the refrigeration room communication submodule A3 and the sensor monitoring submodule A4, a PID control algorithm or an optimized PID algorithm (PID algorithm optimized by genetic algorithm, etc.) is adopted, with the current minimum overall energy consumption of the refrigeration room as the optimization goal, and the refrigeration equipment operation parameter instructions that are more energy-efficient than the overall power consumption of the refrigeration equipment in the current refrigeration room (including the power consumption of the chiller, the power consumption of the freezing pump, the power consumption of the cooling pump and the power consumption of the cooling tower) are optimized, and the refrigeration equipment operation parameter instructions are fed back to the chiller module, the freezing water pump module, the cooling water pump module and the cooling tower module through the refrigeration room communication submodule 3.

[0040] like Figure 1 As shown, the output signal, i.e., the control instruction, is specifically, the chiller: start-stop signal, optimal chilled water supply temperature, optimal load rate; chilled water pump: start-stop state, optimal operating frequency; cooling water pump: start-stop state, optimal operating frequency; cooling tower: start-stop state, optimal operating frequency. In addition, in this embodiment, the energy-saving control system is also equipped with a display screen to display the current operating status of the refrigeration equipment, the hotel occupancy rate, and the information of various sensors.

[0041] In this embodiment, the optimization method adopted by the controller in the refrigeration room energy-saving control submodule 1 can be a manually input control instruction or program, a PID algorithm, an artificial intelligence algorithm, or a PID algorithm optimized by an artificial intelligence algorithm.

[0042] The signal input of the refrigeration room energy-saving control module of this embodiment includes not only the operation signal of the refrigeration room equipment, but also the communication signal from the air-conditioning terminal, the signal of various sensors and the most important information of the real-time occupancy rate of hotel staff.

[0043] The refrigeration room communication module in this embodiment is characterized by having a chiller communication module, a refrigeration pump communication module, a cooling pump communication module and a cooling tower communication module.

[0044] The air-conditioning terminal communication module in this embodiment is characterized in that the air-conditioning terminal communication module has typical room temperature and humidity, typical room air supply temperature and humidity, and typical room set temperature and humidity.

[0045] In summary, the utility model feeds back the information of the real-time occupancy rate of personnel to the energy-saving control submodule of the refrigeration room. Since the control of the refrigeration equipment in the refrigeration room is not performed all the time, but the feedback time step of the real-time occupancy rate of personnel is definitely smaller than the time step of the refrigeration equipment control, when the hotel occupancy rate increases / decreases sharply compared with the same period in history, the refrigeration capacity of the refrigeration room is adjusted in a large range in advance, and the refrigeration capacity is increased / decreased, so as to quickly respond to the refrigeration demand of the air-conditioning terminal and achieve energy saving. Therefore, the utility model has a wide range of application prospects.

[0046] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An energy-saving control system for a hotel refrigeration room taking into account the occupancy rate of personnel, comprising: Signal input module, controller module, signal output module, characterized in that the signal input module includes: hotel staff real-time occupancy rate submodule, air conditioning terminal communication submodule, refrigeration room communication submodule, sensor monitoring submodule, the controller module includes: refrigeration room energy-saving control submodule; The hotel staff real-time occupancy rate submodule is used to collect real-time staff occupancy rate information of the hotel management system; The air conditioning terminal communication submodule is used to collect the temperature and humidity information of the hotel room, set the temperature and humidity information, and the air supply temperature and humidity information of the air conditioning terminal; The refrigeration room communication submodule is used to collect and feed back the operation information of the refrigeration equipment in the refrigeration room; The sensor monitoring submodule is used to collect sensing information of each sensor; The refrigeration room energy-saving control submodule is used to optimize the refrigeration equipment operating parameters of the overall power consumption and energy saving of the refrigeration equipment in the current refrigeration room with the goal of minimizing the overall energy consumption of the current refrigeration room, and to feedback and control the operation of the refrigeration equipment in the refrigeration room through the refrigeration room communication submodule; The hotel staff real-time occupancy rate submodule, the air conditioning terminal communication submodule, the refrigeration room communication submodule, and the sensor monitoring submodule are respectively electrically connected to the refrigeration room energy-saving control submodule; The refrigeration equipment includes: a chiller, a freezing water pump, a cooling water pump, and a cooling tower.

2. The hotel refrigeration room energy-saving control system considering the occupancy rate according to claim 1 is characterized in that: The sensor monitoring submodule includes: a chilled water supply temperature sensor, a chilled water return temperature sensor, a cooling water supply temperature sensor, a cooling water return temperature sensor, a chilled water flow meter, a cooling water flow meter, a chilled water supply pressure sensor, a chilled water return pressure sensor, and an outdoor air temperature and humidity sensor.

3. The hotel refrigeration room energy-saving control system considering the occupancy rate according to claim 1 is characterized in that: The electrical connection modes in which the hotel staff real-time occupancy rate submodule, the air conditioning terminal communication submodule, the refrigeration room communication submodule, and the sensor monitoring submodule are respectively electrically connected to the refrigeration room energy-saving control submodule include: wired communication connection and wireless communication connection.

4. The hotel refrigeration room energy-saving control system considering the occupancy rate according to claim 1 is characterized in that: The chiller is provided with a chiller submodule, and the chiller submodule is used to collect the real-time cooling capacity, real-time electric power, load rate, and current start and stop status of the chiller; The chilled water pump is provided with a chilled water pump submodule, and the chilled water pump submodule is used to collect the real-time electric power, flow rate and frequency of the chilled water pump; The cooling water pump is provided with a cooling water pump submodule, and the cooling water pump submodule is used to collect the real-time electric power, flow rate and frequency of the cooling water pump; The cooling tower is provided with a cooling tower submodule, and the cooling tower submodule is used to collect the real-time electric power, flow rate and frequency of the cooling tower fan; The chiller submodule, the freezing water pump submodule, the cooling water pump submodule, and the cooling tower submodule are electrically connected to the refrigeration room communication submodule respectively.

5. The hotel refrigeration room energy-saving control system considering the occupancy rate according to claim 1 is characterized in that: The energy-saving control system is also provided with a display screen, which is used to display the current operating status of the refrigeration equipment, the hotel occupancy rate and the sensing information collected by each sensor. The display screen is electrically connected to the refrigeration room energy-saving control submodule.

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