A room temperature control method and a refrigeration system for self-seeking the lowest energy consumption point

Abstract

The present invention relates to the technical field of air-conditioning refrigeration, and specifically discloses a room temperature control method and a refrigeration system for self-seeking the lowest energy consumption point. The method includes: entering the standby state when Toutlet drops to be lower than Tset by Tcomp, n-1, entering the working state when Toutlet rises to Treset, and obtaining the power consumption per unit time Wn-1 of the refrigeration system during the (n-1)th cycle from Toutlet = Tset to Toutlet = Treset; entering the standby state when Toutlet drops to be lower than Tset by Tcomp, n, entering the working state when Toutlet rises to Treset, and obtaining the power consumption per unit time Wn of the refrigeration system during the nth cycle from Toutlet = Tset to Toutlet = Treset; obtaining the target temperature compensation value Tcomp, target according to the magnitude relationship between Wn-1 and Wn. The present invention provides a room temperature control method and a refrigeration system for self-seeking the lowest energy consumption point, which can perform room temperature control according to the actual working conditions, and thus solve the problem of high energy consumption of the existing room temperature control method.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning refrigeration, and particularly to a room temperature control method and a refrigeration system for self-seeking the lowest energy consumption point. Background Art

[0002] The refrigeration system installs an evaporator (commonly known as the "indoor unit") in the indoor space. The air in the indoor space enters the evaporator through the air inlet at the top of the evaporator, absorbs the cold, and then returns to the indoor space through the air outlet at the lower part of the evaporator, thereby realizing the cooling operation of the indoor space.

[0003] Theoretically, a room temperature sensor for collecting the overall ambient temperature of the indoor space (hereinafter referred to as the "room temperature" for short of the "overall ambient temperature of the indoor space") can be placed at the middle position of the indoor space. When the room temperature T detected by the room temperature sensor 室 is equal to the target room temperature T set by the user 设 , the refrigeration system can be turned off.

[0004] However, the room temperature sensor cannot be suspended, and if the room temperature sensor is too far away from the refrigeration system, the wiring is also inconvenient. Therefore, currently, the outlet air temperature T detected by the outlet air temperature sensor installed at the outlet position of the evaporator is used to evaluate the room temperature T 出风 . Specifically, the outlet air temperature T 室 is necessarily slightly lower than the room temperature T 出风 . Therefore, according to the experimental data, a temperature compensation value T 室 can be preset, and (T 补 +T 出风 ) is used to represent T 补 , that is, T 室 =T 室 +T 出风 +T 补 .

[0005] Taking T 补 =2°C as an example, when the user sets the target room temperature T 设 =25°C, the existing room temperature control method of the refrigeration system is as follows:

[0006] ① After the refrigeration system starts, it works continuously and monitors the outlet air temperature T 出风 in real time;

[0007] ② When T 出风 drops to be equal to the target room temperature T 设 (i.e., 25°C), the refrigeration system remains in the working state;

[0008] ③ Until when T 出风 drops by the temperature compensation value T 补 (i.e., drops by 2°C again), at this time, the outlet air temperature T出风 = 23°C, the background defaults to the indoor temperature T at this time 室 = T 出风 + T 补 = 23°C + 2°C = 25°C, which meets the user's set target, and then the refrigeration system enters the standby state;

[0009] ④ After a period of time, the indoor temperature will gradually rise. When the outlet air temperature T detected by the outlet air temperature sensor 出风 reaches the restart temperature T 重 (generally, the restart temperature T 重 is slightly higher than the target room temperature T 设 , for example, the restart temperature T 重 is 26°C), the refrigeration system enters the refrigeration state again, and steps ①②③ are repeated to keep the room temperature always fluctuating up and down around the target room temperature T 设 .

[0010] The problem with the above room temperature control method is that different indoor spaces have different sizes, and using a temperature compensation value T set at the factory to evaluate all indoor temperatures T 补 is not reasonable. For example, in step ④, when T 室 reaches 26°C (the restart temperature T 出风 ), the refrigeration system is started again: 重 )

[0011] When the indoor space is large, the air temperature in the corner far from the evaporator may still be at a relatively low temperature (for example, still at 24°C, etc.). Taking the target temperature of 25°C as an example, the air in this part contains a certain amount of cold energy. The existing room temperature control method starts the machine in advance, which will increase the energy consumption of the refrigeration system.

[0012] Therefore, it is necessary to improve the existing room temperature control method to solve the problem that it cannot control the room temperature according to the actual working conditions, resulting in high energy consumption. Summary of the Invention

[0013] An object of the present invention is to provide a room temperature control method and a refrigeration system for self-seeking the lowest energy consumption point, which can control the room temperature according to the actual working conditions, thereby solving the problem of high energy consumption of the existing room temperature control method.

[0014] To achieve the above object, on the one hand, the present invention provides a room temperature control method for self-seeking the lowest energy consumption point, including the following steps:

[0015] When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the temperature compensation value T of the (n - 1)th cycle 补，n-1 , the refrigeration system is put into the standby state; when the outlet air temperature T出风 Rise to the restart temperature T 重 When it reaches, make the refrigeration system enter the working state; obtain the power consumption per unit time W of the (n - 1)th cycle of the refrigeration system from T 出风 = T 设 to T 出风 = T 重 during the period; n-1 ;

[0016] When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the temperature compensation value T of the nth cycle 补，n , make the refrigeration system enter the standby state; when the outlet air temperature T 出风 rises to the restart temperature T 重 , make the refrigeration system enter the working state; among them, obtain the power consumption per unit time W of the nth cycle of the refrigeration system from T 出风 = T 设 to T 出风 = T 重 during the period; n ;

[0017] According to the magnitude relationship between the power consumption per unit time W of the (n - 1)th cycle n-1 and the power consumption per unit time W of the nth cycle n , obtain the target temperature compensation value T 补，目标 ;

[0018] Among them, n is a natural number, and n ≥ 2; when n = 2, T 补，n ≠ T 补，n-1 .

[0019] Optionally, the step "When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the temperature compensation value T of the (n - 1)th cycle 补，n-1 , make the refrigeration system enter the standby state; among them, obtain the power consumption per unit time W of the (n - 1)th cycle of the refrigeration system from T 出风 = T 设 to T 出风 =(T 设 - T 补，n-1 ) during the period" and the step "When the outlet air temperature T n-1 " and the step "When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the temperature compensation value T of the nth cycle 补，n , make the refrigeration system enter the standby state; among them, obtain the power consumption per unit time W of the refrigeration system from T 出风 = T 设 to T 出风 =(T 设 - T补，n ) The power consumption per unit time W of the refrigeration system during the nth cycle n ” also includes:

[0020] When the outlet air temperature T 出风 rises to the restart temperature T 重 , the refrigeration system is put into the working state; where the T 重 ≥T 设 .

[0021] Optionally, the step "obtaining the target temperature compensation value T n-1 according to the magnitude relationship between the power consumption per unit time W n in the (n - 1)th cycle and the power consumption per unit time W 补，目标 in the nth cycle" includes:

[0022] When W n <W n-1 :

[0023] If T 补，n <T 补，n-1 , let T 补，n+1 <T 补，n <T 设 ;

[0024] If T 补，n >T 补，n-1 , let T 设 >T 补，n+1 >T 补，n .

[0025] Optionally, the step "obtaining the target temperature compensation value T n-1 according to the magnitude relationship between the power consumption per unit time W n in the (n - 1)th cycle and the power consumption per unit time W 补，目标 in the nth cycle" includes:

[0026] When W n >W n-1 :

[0027] If T 补，n <T 补，n-1 , let T 设 >T 补，n+1 >T 补，n ;

[0028] If T 补，n >T 补，n-1 , let T 补，n+1 <T 补，n <T 设 .

[0029] Optionally, the step "obtaining the target temperature compensation value T according to the power consumption per unit time W in the (n-1)th cycle" n-1 and the power consumption per unit time W in the nth cycle n includes: 补，目标 "

[0030] When W n = W n-1 , let T 补，目标 = T 补，n-1 , or let T 补，目标 = T 补，n .

[0031] Optionally, in each of the above steps:

[0032] Operate the refrigeration system with the lowest energy efficiency operating parameters.

[0033] Optionally, before the step "operating the refrigeration system with the lowest energy efficiency operating parameters", it further includes:

[0034] Obtaining the lowest energy efficiency operating parameters of the refrigeration system under various operating conditions.

[0035] Optionally, the operating conditions include at least one of the outdoor ambient temperature T 环 , the indoor temperature T 室 and the target room temperature T 设 .

[0036] Optionally, the lowest energy efficiency operating parameters include at least one of the compressor speed, the electronic expansion valve steps, and the fan speed corresponding to the lowest energy consumption state when the refrigeration system is in different operating conditions.

[0037] On the other hand, a refrigeration system is provided for performing any one of the above-described room temperature control methods for self-seeking the lowest energy consumption point.

[0038] The beneficial effects of the present invention are as follows: A room temperature control method and a refrigeration system for self-seeking the lowest energy consumption point are provided. According to the magnitude relationship between the power consumption per unit time W in the previous cycle n-1 and the power consumption per unit time W in the current cycle n , the target temperature compensation value T that enables the refrigeration system to operate with the lowest energy consumption is obtained 补，目标 , making full use of the effective cooling capacity of the air in the indoor space and reducing the operating energy consumption of the refrigeration system. Therefore, the problem of high energy consumption in the existing room temperature control methods can be solved. Description of the Drawings

[0039] To more clearly illustrate the technical solutions in this embodiment or the prior art, the following will briefly introduce the drawings required for the description of the embodiment or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a flowchart of the room temperature control method for self-seeking the lowest energy consumption point provided in the first embodiment of the present invention. Detailed implementation manners

[0041] To make the objectives, features, and advantages of the present invention more obvious and understandable, the following will clearly and completely describe the technical solutions in this embodiment with reference to the drawings in this embodiment. Obviously, the embodiments described below are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0042] Embodiment 1

[0043] This embodiment provides a room temperature control method and a refrigeration system for self-seeking the lowest energy consumption point, which are applicable to the application scenario in the refrigeration temperature control technology field where the indoor temperature always fluctuates above and below the set temperature. The temperature compensation value in the later stage can be corrected according to the previous power consumption situation, thereby reducing the refrigeration power consumption. The room temperature control method for self-seeking the lowest energy consumption point is executed by the refrigeration system and is implemented by software and / or hardware.

[0044] In this embodiment, the refrigeration system includes a compressor, a condenser (including a condensing fan and a condensing heat exchanger), an electronic expansion valve (or other throttling devices), and an evaporator (including an evaporating fan and an evaporating heat exchanger), etc. Specifically, the specific connection structure of each component in the refrigeration system is not the focus of the present invention, so it will not be elaborated.

[0045] The above refrigeration system is used to execute Figure 1 the provided room temperature control method for self-seeking the lowest energy consumption point. Refer to Figure 1 , the room temperature control method for self-seeking the lowest energy consumption point includes the following steps:

[0046] S10: When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the temperature compensation value T 补，n-1 of the (n - 1)th cycle, the refrigeration system enters the standby state;

[0047] Further, entering the standby state specifically means shutting down at least one of the compressor, electronic expansion valve, and blower, etc.

[0048] S20: When the outlet air temperature T 出风 rises to the restart temperature T 重 , the refrigeration system is put into the working state; where the T 重 ≥T 设 ;

[0049] At this time, obtain the power consumption per unit time W 出风 =T 设 to T 出风 =T 重 during the (n - 1)-th cycle of the refrigeration system; n-1 ;

[0050] It should be emphasized that in step S10, the starting point of the time calculation for the power consumption per unit time W n-1 is from T 出风 =T 设 and it does not directly record the power consumption and time used as soon as the machine is turned on;

[0051] Further, in step S20, the ending point of the time calculation for the power consumption per unit time W n-1 is from T 出风 =T 重 and it does not directly stop recording the power consumption and time used after entering the standby state;

[0052] S30: When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the temperature compensation value T 补，n of the n-th cycle, the refrigeration system is put into the standby state; when the outlet air temperature T 出风 rises to the restart temperature T 重 , the refrigeration system is put into the working state; where obtain the power consumption per unit time W 出风 =T 设 to T 出风 =T 重 during the n-th cycle of the refrigeration system; n where n is a natural number and n≥2; when n = 2, T 补，n ≠T 补，n-1 ;

[0053] Similarly, in step S30, the starting point of the time calculation for the power consumption per unit time W n is from T 出风 =T 设 and it does not directly record the power consumption and time used as soon as the machine is restarted;

[0054] Power consumption per unit time W in the nth cycle n The time calculation end point of is from T 出风 = T 重 That is, the recording of power consumption and time used does not stop directly after entering the standby state.

[0055] S40: Obtain the target temperature compensation value T according to the magnitude relationship between the power consumption per unit time W in the (n - 1)th cycle n-1 and the power consumption per unit time W in the nth cycle n 补，目标 .

[0056] Specifically, step S40 includes:

[0057] S401: When W n < W n-1 , it indicates that the power consumption per unit time W in the current cycle n is less than the power consumption per unit time W in the previous cycle n-1 . Therefore, the adjustment direction of the temperature compensation value T in the current cycle 补，n relative to the temperature compensation value T in the previous cycle 补，n-1 is correct. That is, if the temperature compensation value T in the current cycle 补 is less than (or greater than) the temperature compensation value T in the previous cycle 补，n , then the temperature compensation value T in the next cycle 补，n-1 should also be less than (or greater than) the temperature compensation value T in the previous cycle 补，n+1 . Further, generally, the temperature compensation value T 补，n-1 is less than the target room temperature T 补 . Therefore, it can be set that: 设

[0058] If T 补，n < T 补，n-1 , let T 补，n+1 < T 补，n < T 设 ;

[0059] If T 补，n > T 补，n-1 , let T 设 > T 补，n+1 > T 补，n ;

[0060] It should be noted that step S402 can be simply understood as a kind of positive feedback regulation;

[0061] S402: When W n > W n-1 ​​When it indicates the power consumption per unit time W of the current cycle n is greater than the power consumption per unit time W of the previous cycle n-1 , so the temperature compensation value T of the current cycle 补，n relative to the temperature compensation value T of the previous cycle 补，n-1 has the wrong adjustment direction, that is, if the temperature compensation value T of the current cycle 补，n is less than (or greater than) the temperature compensation value T of the previous cycle 补，n-1 , then the temperature compensation value T of the next cycle 补，n+1 should be greater than (or less than) the temperature compensation value T of the previous cycle 补，n-1 . Further, generally the temperature compensation value T 补 is less than the target room temperature T 设 , so it can be set that:

[0062] If T 补，n <T 补，n-1 , let T 补，n+1 <T 补，n <T 设 ;

[0063] If T 补，n >T 补，n-1 , let T 设 >T 补，n+1 >T 补，n ;

[0064] It should be noted that step S403 can be simply understood as a kind of reverse feedback regulation;

[0065] S403: When W n =W n-1 , it indicates that the power consumption per unit time W of the current cycle n is equivalent to the power consumption per unit time W of the previous cycle n-1 , so the temperature compensation value T of the current cycle 补，n or the temperature compensation value T of the previous cycle 补，n-1 is both matched to the current indoor space, and the difference brought by them is not significant (for example, after multiple adjustments in steps S402 and S403, the difference between T 补，n and T 补，n-1 may be only 0.1 °C. Therefore, although there is a slight difference between T 补，n and T 补，n-1 , the difference between W n and W n-1 is not significant). So the temperature compensation value T of the previous cycle 补，n or the temperature compensation value T of the previous cycle 补，n-1 can be used as the target temperature compensation value T 补，目标 that is most matched to this indoor space. That is, it can be set that T补，目标 = T 补，n-1 , or, let T 补，目标 = T 补，n .

[0066] It should be noted that after multiple repeated executions of the corrections in steps S401 and S402, finally W n will gradually approach W n-1 (i.e., gradually tend to S403). When the difference between W n and W n-1 is within the allowable error range, it can be considered that W n = W n-1 . The temperature compensation value T 补，n at this time is the temperature compensation value T 补 that best matches the current indoor space. Therefore, the room temperature control method for self-seeking the lowest energy consumption point provided by the present invention can enable the refrigeration system to automatically find the optimal temperature compensation value (i.e., the target temperature compensation value T 补，目标 ) that matches the indoor space, thereby effectively reducing the working energy consumption.

[0067] It can be understood that when the target room temperature T 设 changes, the optimal temperature compensation value may also change. At this time, only need to re-execute steps S10 to S40 to re-determine the new target temperature compensation value T 补，目标 .

[0068] The following explains the room temperature control method for self-seeking the lowest energy consumption point in combination with specific parameters:

[0069] S101: At the beginning, the refrigeration system is in the shutdown state. At this time, the evaporator does not blow cold air. Therefore, the T 出风 detected by the air outlet temperature sensor at the evaporator can be considered as the indoor temperature T 室 .

[0070] After the user sets the target room temperature T 设 (for example, 25 °C) (generally, before the refrigeration system works, T 设 < T 出风 ), the refrigeration system enters the working state, and the compressor, electronic expansion valve, indoor fan, outdoor fan, etc. start to operate;

[0071] S102: As the refrigeration system continues to operate, T 出风 gradually decreases. When the air outlet temperature T 出风 decreases to be lower than the target room temperature T 设 by the first cycle temperature compensation value T 补，1 (T 补，1 is a preset value, for example, it can be 2 °C), the refrigeration system enters the standby state; that is, in the first cycle, T出风 When the temperature is 23°C, put the refrigeration system into the standby state;

[0072] S20: After the refrigeration system is in standby, the indoor temperature gradually rises. When the outlet air temperature T 出风 rises to the restart temperature T 重 (for example, 26°C), put the refrigeration system back into the working state;

[0073] At this time, obtain the power consumption per unit time W1 of the first cycle of the refrigeration system from T 出风 = T 设 (25°C) to T 出风 = T 重 (26°C);

[0074] S301: As the refrigeration system continues to operate, T 出风 gradually decreases. When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the second cycle temperature compensation value T 补，2 (T 补，2 is a preset value, for example, it can be 3°C), put the refrigeration system into the standby state. Subsequently, T 出风 gradually rises. When T 出风 rises to T 重 , the compressor of the refrigeration system restarts again; among them, when defining the preset value, T 补，2 can be 1°C or 3°C, etc., but it is limited that T 补，2 ≠ T 补，1 ; In this embodiment, it is mainly introduced with T 补，2 being 3°C;

[0075] S302: Obtain the power consumption per unit time W2 of the second cycle of the refrigeration system from T 出风 = 25°C to T 出风 = 26°C;

[0076] S40a: If the difference between W1 and W2 is within the allowable error range, it means that T 补，1 or T 补，2 can both be used as the optimal temperature compensation value for this indoor space. That is, in the operation of the next cycle, the target temperature compensation value T 补，目标 can be equal to 2°C or 3°C;

[0077] Subsequently, when the refrigeration system reaches the set temperature and goes into standby and then restarts again in each cycle, as long as the target room temperature T 设 remains unchanged, 2°C or 3°C can be directly used as the target room temperature T 设 , that is, when the outlet air temperature T 出When the temperature drops to 22℃ or 23℃, the refrigeration system automatically enters the standby state; of course, the above steps can be continued, and the target temperature compensation value T of this operation is re-determined each time the system re-enters the working state. 补，目标 ;

[0078] S40b: If the difference between W1 and W2 is outside the allowable error range, it means that two cycles are not enough to obtain the target temperature compensation value T 补，目标 ;

[0079] (1) When W2<W1, positive feedback adjustment is performed to make the temperature compensation value T 补，3 4℃(T 补，3 Greater than T 补，2 Then, when the air outlet temperature T 出风 When the temperature drops to 21℃, the refrigeration system enters standby mode and the refrigeration system is 出风 =25℃ to T 出风 = The power consumption per unit time of the refrigeration system in the third cycle during the period of 26℃ is W3; compare W3 and W2 again. If the difference between W3 and W2 is within the allowable error range, it means that the target temperature compensation value T 补，目标 It can be equal to 3℃ or 4℃. Otherwise, according to the relationship between W3 and W2, the temperature compensation value T of the fourth cycle is defined again. 补，4， Then compare W4 and W3 until the power consumption per unit time W of the current cycle is met. n Compared with the power consumption per unit time W of the previous week n-1 Basically equal;

[0080] (2) When W2>W1, reverse feedback adjustment is performed to make the temperature compensation value T 补，3 1℃(T 补，3 Less than T 补，2 Then, when the air outlet temperature T 出风 When the temperature drops to 24℃, the refrigeration system enters standby mode and the refrigeration system is 出风 =25℃ to T 出风 = The power consumption per unit time of the refrigeration system in the third cycle during the period of 26℃ is W3; compare W3 and W2 again. If the difference between W3 and W2 is within the allowable error range, it means that the target temperature compensation value T 补，目标 It can be equal to 1℃ or 2℃. Otherwise, according to the relationship between W3 and W2, the temperature compensation value T of the fourth cycle is defined again. 补，4， Then compare W4 and W3 until the power consumption per unit time W of the current cycle is met. n Compared with the power consumption per unit time W of the previous week n-1 Basically equal.

[0081] In summary, the room temperature control method for self-seeking the lowest energy consumption point provided by this embodiment adjusts the temperature compensation value T of the next cycle forward or backward according to the magnitude relationship between the power consumption per unit time W in the previous cycle n-1 and the power consumption per unit time W in the current cycle n to determine the target temperature compensation value T that minimizes energy consumption, making full use of the effective cooling capacity of the air in the indoor space and reducing the working energy consumption of the refrigeration system 补，n+1 补，目标 补，目标 .

[0082] Embodiment 2

[0083] The room temperature control method for self-seeking the lowest energy consumption point provided by this embodiment can be executed by the refrigeration system provided by Embodiment 1 and has corresponding functions and beneficial effects

[0084] Compared with the room temperature control method for self-seeking the lowest energy consumption point provided by Embodiment 1, the main differences of the room temperature control method for self-seeking the lowest energy consumption point provided by this embodiment include

[0085] (1) Through experiments, the lowest energy efficiency working parameters of the refrigeration system under various operating conditions are obtained in advance

[0086] Specifically, the operating conditions include at least one of the outdoor ambient temperature T 环 , the indoor temperature T 室 ]>, and the target room temperature T 设 , and the lowest energy efficiency working parameters include at least one of the compressor speed, the number of steps of the electronic expansion valve, and the fan speed corresponding to the lowest energy consumption state when the refrigeration system is in different operating conditions 设

[0087] (2) In each step of Embodiment 1, whenever the refrigeration system is in a working state, the refrigeration system is made to operate with the lowest energy efficiency working parameters

[0088] Specifically, although the operating conditions will change at any time as the refrigeration system continues to operate, for any operating condition, appropriate lowest energy efficiency working parameters have been pre-stored. Switching to the appropriate lowest energy efficiency working parameters at any time can enable the refrigeration system to always operate with lower energy consumption and further reduce the working energy consumption

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention

Claims

1. A room temperature control method for self-seeking the lowest energy consumption point, characterized in that, It includes the following steps: When the air outlet temperature T 出风 Lower than the target room temperature T 设 Low temperature compensation value T for the n-1th cycle 补，n-1 When the air outlet temperature T 出风 Rising to the restart temperature T 重 When the refrigeration system enters the working state, the refrigeration system is obtained from T 出风 =T 设 To T 出风 =T 重 The power consumption per unit time of the refrigeration system in the n-1 cycle is W n-1 ; When the outlet air temperature T 出风 drops to be lower than the target room temperature T 设 by the temperature compensation value T of the nth cycle 补，n , the refrigeration system enters the standby state; when the outlet air temperature T 出风 rises to the restart temperature T 重 , the refrigeration system enters the working state; among them, obtain the power consumption W per unit time of the nth cycle of the refrigeration system from T 出风 =T 设 to T 出风 =T 重 during this period n ; According to the power consumption per unit time W in the n-1th cycle n-1 And the power consumption per unit time W in the nth cycle n The size relationship between them is used to obtain the target temperature compensation value T 补，目标 ; Specifically include: When W n <W n-1 When: If T 补，n <T 补，n-1 , let T 补，n+1 <T 补，n <T 设 ; If T 补，n >T 补，n-1 , let T 设 >T 补，n+1 >T 补，n ; When W n > W n-1 : If T 补，n <T 补，n-1 , let T 设 >T 补，n+1 >T 补，n ; If T 补，n > T 补，n-1 , let T 补，n+1 < T 补，n < T 设 ; When W n =W n-1 When T 补，目标 =T 补，n-1 , or, let T 补，目标 =T 补，n ; Where n is a natural number and n≥2; when n=2, T 补，n ≠T 补，n-1 , T 补，目标 The temperature compensation value T for the next cycle 补，n+1 .

2. The room temperature control method for self-seeking the lowest energy consumption point according to claim 1, characterized in that The T 重 ≥T 设 .

3. The room temperature control method for automatically finding the lowest energy consumption point according to claim 1, characterized in that: In each of the above steps: Operate the refrigeration system with the lowest energy efficiency operating parameters.

4. The room temperature control method for self-seeking the lowest energy consumption point according to claim 3, characterized in that, Before the step of "operating the refrigeration system with the lowest energy efficiency operating parameters", it further includes: Obtain the lowest energy efficiency operating parameters of the refrigeration system under various working condition parameters.

5. The room temperature control method for self-seeking the lowest energy consumption point according to claim 4, characterized in that The working condition parameters include at least one of the outdoor ambient temperature T 环 , the indoor temperature T 室 , and the target room temperature T 设 .

6. The room temperature control method for self-seeking the lowest energy consumption point according to claim 4, characterized in that The lowest energy efficiency operating parameters include at least one of the compressor speed, the number of steps of the electronic expansion valve, and the fan speed corresponding to the operation of the refrigeration system in the lowest energy consumption state under different working condition parameters.

7. A refrigeration system, characterized in that, A room temperature control method for self-seeking the lowest energy consumption point according to any one of claims 1 to 6.

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