Air conditioner energy-saving control method based on internal heat source detection and air conditioner

Abstract

The invention discloses an air conditioner energy-saving control method based on internal heat source detection. The method comprises the steps that air conditioner operation data are collected; the matching relation between the environment state parameters and the output capacity of the air conditioner indoor unit is established; judging that the output capacity of the indoor unit corresponding to the current environment state parameter is located in the load output interval position in the matching relation; and when the load output capacity of the indoor unit of the air conditioner is located in the low-load area of the matching relation at multiple continuous moments, the shutdown action is executed. The mapping relation between the air conditioner operation data is identified and mined through the heat source in the room, and energy-saving operation of the air conditioner is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning energy-saving control method based on internal heat source detection and an air conditioner using the control method. Background Art

[0002] As people's living standards continue to improve, air conditioners are increasingly used in homes, offices, businesses and other fields. While air conditioners create a comfortable indoor environment for us, they also increase energy consumption, especially in summer when air conditioner energy consumption sometimes accounts for more than 80% of total electricity consumption. Therefore, research on energy-saving operation of air conditioners is very necessary.

[0003] The energy consumption of air conditioning operation is caused on the one hand by the operation of the air conditioning unit itself, and on the other hand it is mainly caused by the waste caused by users' improper air conditioning usage habits, such as setting extremely low temperatures, frequently turning the machine on and off, forgetting to shut down, etc.

[0004] Aiming at the problem of air conditioning energy waste caused by forgetting to shut down and excessive air conditioning output when no one is indoors, an air conditioning energy-saving control method based on heat source detection in the room is proposed, which is the key technical problem to be solved by the present invention. Summary of the invention

[0005] The present invention provides an air-conditioning energy-saving control method based on internal heat source detection and an air conditioner using the energy-saving control method to solve the technical problem of energy waste.

[0006] The technical solution adopted by the present invention is to propose an air conditioning energy-saving control method based on internal heat source detection, comprising:

[0007] Step 1. Collect air conditioner operation status parameters and air conditioner indoor unit capacity data;

[0008] Step 2. Establish a matching relationship between the environmental state parameters and the output capacity of the air conditioner indoor unit;

[0009] Step 3. Real-time monitoring of air-conditioning operation data, and determining whether the indoor unit output capacity corresponding to the current environmental state parameters is within the load output interval position in the matching relationship;

[0010] Step 4. When the load output capacity of the indoor unit of the air conditioner is in the low load region of the matching relationship for a plurality of consecutive moments, a shutdown operation is performed.

[0011] Preferably, the environmental state parameters include indoor and outdoor environmental temperatures and the indoor environmental temperature at the previous moment.

[0012] Preferably, the environmental state parameter adopts an interval parameter and takes values ​​in a left-open and right-closed manner.

[0013] Preferably, the load output of the indoor unit of the air conditioner is calculated by the enthalpy difference between the outlet air and the return air of the indoor unit.

[0014] Preferably, the matching relationship includes a maximum value and a minimum value of the internal machine load output corresponding to the environmental state parameter, and is divided into a plurality of load output regions between the maximum value and the minimum value of the internal machine load output.

[0015] Furthermore, the step 1 also includes: when a new environmental state parameter is collected, the matching relationship is updated.

[0016] Furthermore, the step 1 also includes filtering the collected data based on preset data filtering conditions to obtain air-conditioning operation data when the indoor environment is in a steady state.

[0017] In one embodiment, the data screening condition is to screen by the difference between the indoor temperature and the set temperature. When the difference between the indoor temperature and the set temperature is ±A value within a certain operating time, the data is considered to be steady-state operating data.

[0018] In another embodiment, the data screening condition is to screen by the fluctuation of the indoor ambient temperature. When the indoor ambient temperature satisfies the room temperature standard temperature difference less than or equal to the set threshold value during a certain operating period, the data during this period is considered to be steady-state operating data.

[0019] The present invention further provides an air conditioner, wherein the air conditioner adopts the above energy-saving control method, and the controller of the air conditioner comprises:

[0020] The acquisition module is used to collect environmental status parameters and internal machine load output data;

[0021] A generation module is used to receive the parameters and data transmitted by the acquisition module and establish a matching relationship between the room status parameters and the output capacity of the air conditioner indoor unit;

[0022] A judgment module compares the real-time monitored environmental status parameters and the corresponding indoor unit load output data with the data in the matching relationship to determine whether the current air conditioner indoor unit load output is in the load output interval position in the matching relationship;

[0023] The execution module is used to execute a shutdown action when the load output of the indoor unit of the air conditioner is in the low load area of ​​the matching relationship for multiple consecutive moments.

[0024] Compared with the prior art, the technical solution proposed by the present invention has the following beneficial effects:

[0025] 1. The air conditioning energy-saving control method based on indoor heat source detection proposed by the present invention effectively solves the problem of air conditioning energy waste caused by forgetting to shut down the air conditioner and excessive air conditioning output when no one is indoors;

[0026] 2. The air-conditioning energy-saving control method proposed in the present invention is based on the indoor heat source identification method. By mining the mapping relationship between the air-conditioning operation data, the air-conditioning is judged and processed whether to shut down. There is no need to obtain the building thermal characteristic parameters in advance, and the implementation is simple;

[0027] 3. The air-conditioning energy-saving control method proposed in the present invention is based on the method of identifying the heat source in the room. There is no need to set up additional physical detection equipment to detect the changes in the heat source in the room, and there is no need to install additional indoor occupancy detection equipment on the air-conditioning unit. It can be processed by the chip in the controller, which is low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, wherein:

[0029] Figure 1 It is a flow chart of the energy-saving control method proposed by the present invention;

[0030] Figure 2 It is a module schematic diagram of the control system of the present invention.

[0031] Figure 3 It is a matching relationship table between environmental status parameters and corresponding internal machine load output. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0033] The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention. Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the protection scope of the present invention.

[0034] The techniques, methods and equipment known to ordinary technicians in the relevant fields are not discussed in detail in this specification, but where appropriate, the techniques, methods and equipment should be considered as part of this specification. Any specific values ​​in this specification should be interpreted as being merely exemplary and not limiting the present invention.

[0035] For the convenience of description, the terms describing the position used in the specification, such as "above...", "to the left of...", "in front of...", etc., are only used to describe the spatial position relationship between a certain component and other components of the embodiment shown in the figure. When the position of the component is different, the relative position will change. Therefore, the position relationship of the embodiment of the drawing should not constitute a limitation to the present invention.

[0036] In addition, it should be noted that the terms "first" and "second" used in the specification are only used to distinguish similar components, and there is no order of precedence, so they cannot be understood as limiting the scope of protection of the present invention.

[0037] The idea of ​​the present invention is to establish a mapping relationship between environmental status parameters and the corresponding air-conditioning indoor unit output capacity, detect the environmental status parameters and the corresponding indoor unit load output data in real time, identify the size of the heat source in the room based on the comparison between the real-time detection data and the mapping relationship, and then control whether the air conditioner is turned off.

[0038] Figure 1 The energy-saving control method of the present invention is a flow chart. The air-conditioning energy-saving control method based on internal heat source detection proposed by the present invention includes:

[0039] Step 1. Collect the state parameters of the air conditioner operation and the corresponding indoor unit capacity data;

[0040] Step 2. Establish a matching relationship between the environmental state parameters and the output capacity of the air conditioner indoor unit based on the collected state parameters and indoor unit capacity data;

[0041] Step 3. Real-time monitoring of air-conditioning operation data, and determining whether the indoor unit output capacity corresponding to the current environmental state parameters is within the load output interval position in the matching relationship;

[0042] Step 4. When the load output capacity of the air conditioner indoor unit is in the low load area of ​​the matching relationship for multiple consecutive moments, the shutdown action is executed.

[0043] like Figure 2 As shown, to implement the above energy-saving control method, the controller of the air conditioner includes:

[0044] The acquisition module is used to collect environmental status parameters and internal machine load output data;

[0045] Preferably, the environmental state parameters include indoor and outdoor environmental parameters and the indoor environmental temperature at the previous moment, and adopt interval parameters to take values ​​in a left-open and right-closed manner.

[0046] Preferably, the load output of the indoor unit of the air conditioner is calculated by the enthalpy difference between the outlet air and the return air of the indoor unit.

[0047] Furthermore, establishing a matching relationship between room status parameters and the output capacity of the air conditioner indoor unit also includes filtering the collected data based on preset data filtering conditions to obtain air conditioner operation data when the indoor environment state is in a steady state.

[0048] A generation module is used to receive the parameters and data transmitted by the acquisition module and establish a matching relationship between the room status parameters and the output capacity of the air conditioner indoor unit;

[0049] Preferably, the matching relationship includes a maximum value and a minimum value of the internal machine load output corresponding to the environmental state parameter, and is divided into a plurality of load output regions between the maximum value and the minimum value of the internal machine load output.

[0050] Preferably, the matching relationship between the room status parameters and the output capacity of the air conditioner indoor unit established by the generation module can be a table of matching relationships.

[0051] A judgment module compares the real-time monitored environmental status parameters and the corresponding indoor unit load output data with the data in the matching relationship to determine whether the current air conditioner indoor unit load output is in the load output interval position in the matching relationship;

[0052] An execution module is used to execute a shutdown action when the load output of the air conditioner indoor unit is in the low load area of ​​the matching relationship for multiple consecutive moments.

[0053] In one embodiment, the data collected by the collection module include: indoor ambient temperature, outdoor ambient temperature, and air conditioner load output data. In another embodiment, the data collected by the collection module may also include humidity in the room.

[0054] like Figure 1 As shown, the following is an operation flow of realizing energy-saving operation of air conditioner based on real-time detection result of internal heat source proposed by the present invention in combination with the optimized embodiment:

[0055] S1. The indoor and outdoor ambient temperature data and the user set temperature are obtained in real time through the temperature sensor, and the indoor unit capacity data of the corresponding state parameters are calculated. The indoor unit capacity data is specifically the cold / heat load output by the indoor unit of the air conditioner, which can be calculated through the enthalpy difference between the indoor unit's outlet and return air.

[0056] Indoor air relative humidity can also be used as a state parameter of the indoor environment, but this embodiment does not consider this parameter.

[0057] The collected data is filtered based on the preset data filtering conditions, in order to obtain the air conditioning operation data when the indoor environment is in a steady state. There are many ways to filter data. For example, the data can be filtered by the difference between the room temperature and the set temperature. When the indoor environment temperature and the set temperature differ by ±A value, such as ±1°C, during a certain period of operation, the data is considered to be steady-state data, and all the data collected during this period are steady-state data. As another filtering method, the data can be filtered by the fluctuation of the indoor environment temperature. For example, when the indoor environment temperature meets the standard temperature difference of the room temperature within a certain operating period (10min, 20min, etc.) and is less than or equal to a certain threshold (such as 2°C), it is judged that the period is steady-state operation data. The latter filtering method considers that the air conditioning capacity may be too small or the user may choose an extreme set temperature, resulting in the room temperature being unable to be controlled within the range of ±1°C of the set temperature. Here, it means that even if the room temperature does not meet the range of ±1°C of the set temperature, as long as it is in a relatively stable state of up and down fluctuations within a certain period of time, it is also considered to be steady. For example, under cooling conditions, some users set the temperature to 24°C. Generally, the air conditioner can reach the set temperature. In this case, the steady state is judged according to the set temperature ±1°C. Some users like extreme set temperatures, such as 16°C. In this case, the set temperature cannot be reached, so the second method of judging the steady state is adopted. As long as the ups and downs are in a relatively stable state within a certain period of time, it is considered to be in a steady state.

[0058] The time step for collecting data can be selected (for example, 5 minutes or 10 minutes can be selected as the unit), and data is collected every other time step.

[0059] S2. Establish a state-indoor machine capacity table, which is initially defaulted to an empty table with three columns and multiple rows. The first column is the state parameter, the second column is the minimum value of the indoor machine capacity, and the third column is the maximum value of the indoor machine capacity. Each row is a separate state row, where the state is composed of the outdoor ambient temperature at the current moment, the indoor ambient temperature at the current moment, and the indoor ambient temperature at the previous moment. When the generation module receives the data collected by the acquisition module in real time, the state parameter is input into the first column, and the indoor machine capacity is input into the maximum value of the indoor machine capacity and the minimum value of the indoor machine capacity; when the state not in the table is collected, a new row is added below the table as a new state row. Every time new data is received, first check whether there is a corresponding state row in the state-indoor machine capacity table. If not, add a new row. If it exists, compare the current indoor machine capacity with the data in the minimum value column and the maximum value column of the indoor machine capacity in the table. If the current indoor machine capacity is less than the value in the minimum value column of the indoor machine capacity, update it, and the updated value is the current indoor machine capacity; if the current indoor machine capacity is greater than the value in the maximum value column of the indoor machine capacity, update it, and the updated value is the current indoor machine capacity.

[0060] For example, at time t, the outdoor ambient temperature of the air conditioner is 32°C, the indoor temperature is 28°C, and at time t-1, the indoor ambient temperature is 29°C, and the indoor unit capacity is 400W; the corresponding state is ((31,32], (27,28], (28,29]), and the state parameter is in the form of interval group and, where the interval is left open and right closed (left open means that the interval does not include the boundary value, and right closed means that the interval includes the boundary value, for example, (31,32] is equivalent to greater than 31 and less than or equal to 32), and the interval length indicates the range of the state parameter, and different values ​​can be set. Here, 1°C is used as the interval length. At this time, the table searches for whether the state parameter exists. If not, a new state row is added. The value in the table is initially taken from the indoor unit capacity collected at the current moment.

[0061] The interval length can also be selected as other values. If 0 is selected as the interval length, the state parameter is not a range, but the collected data is directly used as the state. For example, the outdoor temperature is 32.2℃, the indoor temperature is 26.7℃, and the indoor temperature was 27.0℃ at the last moment. The composition state is (32.2, 26.7, 27.0). The interval method can reduce the number of states. The larger the interval length, the fewer the number of states (for example, the state ((31,32], (27,28], (28,29]) is considered as one state as long as the collected data satisfies that the outdoor temperature belongs to the interval of 31, 32, the indoor temperature belongs to the interval of 27, 28, and the room temperature at the last moment belongs to the interval of 28, 29).

[0062] The initial collection data is as follows:

[0063] Status parameters Minimum internal machine capacity Maximum internal capacity ((31,32],(27,28],(28,29]) 400 400

[0064] After collecting data at multiple times, multiple rows of status are updated in the table:

[0065] Status parameters Minimum internal machine capacity Maximum internal capacity ((31,32],(27,28],(28,29]) 400 400 ((30,31],(26,27],(27,28]) 300 800 ((30,31],(26,27],(25,26]) 500 900 ... ... ... ((29,30],(23,24],(24,25]) 200 700

[0066] The data collected by the acquisition module at a certain moment is as follows:

[0067] The outdoor temperature of the air conditioner is 32℃, the indoor temperature is 28℃, the indoor temperature at time t-1 is 29℃, and the indoor unit capacity is 600W; the corresponding state parameters are:

[0068] ((31,32],(27,28],(28,29]).

[0069] From the table, we can see that the above status parameters are already in the corresponding status row, i.e. the first row. The actual collected indoor machine capacity 600W is compared with the minimum indoor machine capacity value and the maximum indoor machine capacity value in the table. 600W is not lower than the minimum indoor machine capacity value, so the value is not updated. 600W is higher than the maximum indoor machine capacity value, so the value is updated. After the update, it is as follows:

[0070] Status parameters Minimum internal machine capacity Maximum internal capacity ((31,32],(27,28],(28,29]) 400 600 ((30,31],(26,27],(27,28]) 300 800 ((30,31],(26,27],(25,26]) 500 900 ... ... ... ((29,30],(23,24],(24,25]) 200 700

[0071] When the cumulative running time of the unit reaches a certain length (for example, 1 day, 10 days, 30 days, etc.), the table stores the maximum and minimum values ​​of the internal machine capacity corresponding to multiple state points, that is, a matching relationship table between the state parameters and the internal machine capacity is established.

[0072] S3. After receiving the real-time air-conditioning operation data sent by the acquisition module, the judgment module searches for the corresponding status row in the status parameter and indoor unit capacity matching relationship table. If the corresponding status row does not exist in the table, no action is taken. If the corresponding row can be found and the maximum value of the indoor unit capacity and the minimum value of the indoor unit capacity are not equal, the following judgment is performed:

[0073] The maximum and minimum values ​​of the internal machine capacity in the status line are used as the upper and lower limits of the interval, and the interval is divided. In this embodiment, it is divided into four small intervals, named the first, second, third, and fourth intervals. For example, the minimum and maximum values ​​are in the interval [100, 200], which are equally divided into four small intervals, namely [100, 125), [125, 150), [150, 175) and

[0074] [175,200]. Under cooling conditions, the actual indoor unit capacity of the current unit is determined to be in the interval range. If it is in the first interval, the current internal heat source is judged to be low; if it is in the fourth interval, the current internal heat source is judged to be high; if it is in other intermediate intervals, the current internal heat source is judged to be moderate. If n consecutive time steps (n can be 3, 4, 5, etc.) are judged to be low in internal heat source, it means that the real-time internal heat source of the room has been maintained at a low level for a long time, and there may be a situation where no one is in the room. At this time, a signal is sent to the execution module to shut down the air conditioner. Under heating conditions, if the actual indoor unit capacity of the current unit is in the first interval, the current internal heat source is judged to be high; if it is in the fourth interval, the current internal heat source is judged to be low; if it is in other intermediate intervals, the current internal heat source is judged to be moderate. If the internal heat source is judged to be low for n consecutive time steps (n can be 3, 4, 5, etc.), it means that the real-time internal heat source of the room has been maintained at a small level for a long time, and there may be a situation where no one is in the room. In this case, a signal is sent to the execution module to shut down the air conditioner.

[0075] The following are some examples using specific data:

[0076] Status parameters Minimum internal machine capacity Maximum internal capacity ((31,32],(27,28],(28,29]) 400 600 ((30,31],(26,27],(27,28]) 300 800 ((30,31],(26,27],(25,26]) 500 900 ... ... ... ((29,30],(23,24],(24,25]) 200 700 ((32,33],(27,28],(28,29]) 400 1000 ((32,33],(26,27],(27,28]) 300 900 ((32,33],(26,27],(26,27]) 300 900

[0077] The acquisition status at time t is ((32,33], (27,28], (28,29]), corresponding to the sixth row of parameters in the table. The acquisition capacity of the internal machine is 500W. The internal machine capacity range is divided into four equal parts: 400-550, 550-700, 700-850, 850-1000. 500W is in the first interval of (400,550]. At this time, it is marked that the current time t is a small internal heat source; the acquisition status at time t+1 is ((32,33], (26,27], (27,28]), corresponding to the seventh row of parameters in the table The collected indoor unit capacity is 400W, which is within the first interval of (300,450]. At this time, the current time t+1 is marked as the internal heat source is too small; the collection status at time t+2 is ((32,33], (26,27], (26,27]), corresponding to the eighth row of parameters in the table, the collected indoor unit capacity is 400W, which is within the first interval of (300,450]. At this time, the current time t+2 is marked as the internal heat source is too small; at this time, the internal heat source is judged to be too small for three consecutive moments (n=3), and the judgment module outputs a signal to the execution module to turn off the indoor unit of the air conditioner.

[0078] S4. When the execution module receives the signal from the judgment module to shut down the indoor unit of the air conditioner, it controls the air conditioner to shut down, thereby avoiding energy waste of the air conditioner due to people not being indoors or forgetting to shut down the air conditioner.

[0079] The air conditioner energy-saving control method proposed in the present invention can achieve energy-saving operation of the air conditioner by identifying the heat source in the room and mining the mapping relationship between the air conditioner operation data. There is no need to obtain the building thermal characteristic parameters in advance, no need to set up additional physical detection equipment to detect the change of the heat source in the room, and no need to install an indoor number detection instrument on the air conditioner. The control is simple and the cost is low.

[0080] The above description is only a specific implementation of the present invention. It should be pointed out that any modification, equivalent substitution and change made within the spirit and framework of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioning energy-saving control method based on internal heat source detection, characterized in that: include: Step 1. Collect air conditioner operation status parameters and indoor unit output capacity data; Step 2. Establish a matching relationship between the environmental state parameters and the corresponding air conditioner indoor unit capacity; Step 3. Real-time monitoring of air-conditioning operation data, and determining whether the indoor unit output capacity corresponding to the current environmental state parameters is within the load output interval position in the matching relationship; Step 4. When the load output capacity of the indoor unit of the air conditioner is in the low load region of the matching relationship for a plurality of consecutive moments, a shutdown operation is performed.

2. The air conditioning energy saving control method according to claim 1, characterized in that: The environmental state parameters include indoor and outdoor environmental temperatures and the indoor environmental temperature at the previous moment.

3. The air conditioning energy saving control method according to claim 2, characterized in that: The environmental state parameters adopt interval parameters and take values ​​in a left-open and right-closed manner.

4. The air conditioning energy saving control method according to claim 1, characterized in that: The load output capacity of the indoor unit of the air conditioner is calculated by the enthalpy difference between the outlet air and the return air of the indoor unit.

5. The air conditioning energy saving control method according to claim 1, characterized in that: The matching relationship includes a maximum value and a minimum value of the internal machine load output corresponding to the environmental state parameter, and is divided into a plurality of load output regions between the maximum value and the minimum value.

6. The air conditioning energy saving control method according to claim 1, characterized in that: The step 1 also includes: when a new environmental state parameter is collected, the matching relationship is updated.

7. The air conditioning energy saving control method according to claim 1, characterized in that: The step 1 also includes filtering the collected data based on preset data filtering conditions to obtain air conditioning operation data when the indoor environment is in a steady state.

8. The air conditioning energy saving control method according to claim 7, characterized in that: The data screening condition is to screen by the difference between the indoor temperature and the set temperature. When the difference between the indoor temperature and the set temperature is ±A value during a certain period of operation, the data is considered to be steady-state operation data.

9. The air conditioning energy saving control method according to claim 7, characterized in that: The data screening condition is to screen according to the fluctuation of indoor ambient temperature. When the indoor ambient temperature satisfies the room temperature standard temperature difference less than or equal to the set threshold value during a certain operation period, the data during this period is considered to be steady-state operation data.

10. An air conditioner, characterized in that The air conditioner adopts the energy-saving control method according to any one of claims 1 to 9, and the controller of the air conditioner comprises: A collection module is used to collect environmental status parameters and indoor unit load output data; A generation module is used to receive the parameters and data transmitted by the acquisition module and establish a matching relationship between the room status parameters and the output capacity of the air conditioner indoor unit; A judgment module compares the real-time monitored environmental status parameters and the corresponding indoor unit load output data with the data in the matching relationship to determine whether the current air conditioner indoor unit load output is in the load output interval position in the matching relationship; The execution module is used to execute a shutdown action when the load output of the indoor unit of the air conditioner is in the low load area of ​​the matching relationship for multiple consecutive moments.

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