Method for controlling opening and closing of humidifying fan in refrigeration equipment

Abstract

The invention provides a control method for opening and closing a humidifying fan in refrigeration equipment, the humidifying fan has a working state and a shutdown state, and the control method comprises the following steps that the indoor humidity RH of a refrigeration chamber is obtained; the indoor humidity RH of the refrigeration chamber is compared with a preset humidity range; if the indoor humidity RH of the refrigerating chamber is within the preset humidity range, the humidifying fan is controlled to be kept in the original state; otherwise, whether the indoor humidity RH of the refrigeration chamber meets the condition that the indoor humidity RH of the refrigeration chamber H-preset highest humidity RH high is smaller than or equal to the preset humidity error RH difference, or the indoor humidity RH of the refrigeration chamber H-preset lowest humidity RH low is smaller than or equal to the preset humidity error RH difference is judged; and if one of the two conditions in the step 3 is met, whether the condition that one of the two conditions is met is maintained for preset time t is further judged, and if yes, the humidifying fan is controlled to change the state. Whether the humidity fluctuates or not is judged by calculating the difference value between the humidity in the refrigeration chamber and the preset humidity range and maintaining the state, and the humidifying fan is prevented from being started and stopped due to humidity fluctuation.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a method for controlling the opening and closing of a humidification fan in a refrigeration equipment. Background Art

[0002] Due to the characteristics of the humidity sensor - sensor volatility, great influence of ambient airflow and other factors, the humidification fan can easily be triggered to start and shut down during the precise humidity control process, causing the humidification fan to start or stop frequently in a short period of time, affecting the long-term reliability of the humidification fan and even damaging the life of the humidification fan. Summary of the invention

[0003] The object of the present invention is to provide a method for controlling the opening and closing of a humidifying fan in a refrigeration device. When the indoor humidity of the refrigeration room is no longer within a preset humidity range, the humidifying fan is prevented from being turned on and off due to fluctuations by comparing and maintaining the absolute value of the difference between the indoor humidity of the refrigeration room and a preset maximum humidity or a preset minimum humidity. This solves the problem in the prior art that the humidifying fan is frequently turned on and off due to humidity fluctuations, resulting in the life of the humidifying fan being damaged.

[0004] In order to achieve one of the above-mentioned purposes of the invention, an embodiment of the present invention provides a method for controlling the opening and closing of a humidifying fan in a refrigeration device, wherein the humidifying fan includes a working state and a shutdown state, and comprises the following steps:

[0005] Step 1: Obtain the indoor humidity RH of the refrigeration room;

[0006] Step 2: Compare the indoor humidity RH of the refrigeration room with the preset humidity range;

[0007] Step 3: If the indoor humidity RH of the refrigeration room is within the preset humidity range, the humidification fan is controlled to maintain the original state; otherwise, it is determined whether the indoor humidity RH of the refrigeration room satisfies: | indoor humidity RH of the refrigeration room - preset maximum humidity RH 高 |≤Preset humidity error RH 差 , or, | Refrigeration room indoor humidity RH - preset minimum humidity RH 低 |≤Preset humidity error RH 差 ;

[0008] Step 4: If one of the two conditions in step 3 is satisfied, further determine whether the condition that one of the two conditions is satisfied is maintained for a preset time t 预 , if so, the humidification fan is controlled to change state.

[0009] As a further improvement of an embodiment of the present invention, in step 4, it is determined whether the situation in which one of the above two conditions is satisfied is maintained for a preset time t 预If one of the above two conditions is not maintained for the preset time t 预 , then return to step 2.

[0010] As a further improvement of an embodiment of the present invention, if the humidifying fan is in a stopped state when obtaining the indoor humidity RH of the refrigeration room, then in step 2, the indoor humidity RH of the refrigeration room is compared with the preset minimum humidity RH. 低 Compare; in step 3, if the indoor humidity RH of the refrigeration room ≥ the preset minimum humidity RH 低 , then the humidification fan is controlled to remain in the shutdown state, otherwise proceed to the next step.

[0011] As a further improvement of an embodiment of the present invention, in step 3, if the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH 低 , then determine whether the indoor humidity RH of the refrigeration room meets the preset minimum humidity RH 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 If yes, go to step 4, otherwise control the humidification fan to change from shutdown state to working state.

[0012] As a further improvement of an embodiment of the present invention, in step 4, if the preset minimum humidity RH 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 Maintain the preset time t 预 , then the humidification fan is controlled to change from the shutdown state to the working state.

[0013] As a further improvement of an embodiment of the present invention, if the humidifying fan is in working state when obtaining the indoor humidity RH of the refrigeration room, then in step 2, the indoor humidity RH of the refrigeration room is compared with the preset maximum humidity RH. 高 Compare; in step 3, if the indoor humidity RH of the refrigeration room is less than the preset maximum humidity RH 高 , then the humidification fan is still in working state, otherwise proceed to the next step.

[0014] As a further improvement of an embodiment of the present invention, in step 3, if the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 , then determine whether the indoor humidity RH of the refrigeration room meets: indoor humidity RH of the refrigeration room - preset maximum humidity RH 高 ≤Preset humidity error RH 差 If yes, go to step 4, otherwise control the humidification fan to change from working state to shutdown state.

[0015] As a further improvement of an embodiment of the present invention, in step 4, if the indoor humidity RH of the refrigeration room is less than the preset maximum humidity RH 高 ≤Preset humidity error RH差 Maintain the preset time t 预 , then the humidification fan is controlled to change from the working state to the shutdown state.

[0016] As a further improvement of an embodiment of the present invention, the preset time t 预 For 3 minutes.

[0017] As a further improvement of an embodiment of the present invention, the preset humidity error RH 差 is 1%.

[0018] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0019] In the control method for turning on and off the humidification fan in the refrigeration equipment provided by the present invention, if the indoor humidity of the refrigeration room is not within the preset humidity range, the absolute value of the difference between the indoor humidity of the refrigeration room and the preset maximum humidity or the preset minimum humidity is calculated. If the absolute value of the difference is greater than the preset humidity error, it is considered that the humidity deviation is large, and the humidification fan state is not changed due to humidity fluctuations. If the absolute value of the difference is not greater than the preset humidity error, it is further determined whether the absolute value of the difference remains not greater than the preset humidity error within a preset time. If so, it is considered that the humidity is indeed too high or too low, and the humidification fan state is changed to change the humidity, thereby avoiding the humidification fan from starting or stopping due to humidity fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of a method for controlling the opening and closing of a humidifying fan in a refrigeration device in an embodiment of the present invention (initially in a shutdown state).

[0021] Figure 2 This is another flow chart of the method for controlling the opening and closing of the humidification fan in the refrigeration equipment in the embodiment of the present invention (initial working state). DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the present invention provides a method for controlling the opening and closing of a humidifying fan in a refrigeration device, such as Figure 1 As shown, the humidifying fan includes a working state and a shutdown state, including the following steps:

[0024] Step 1: Obtain the indoor humidity RH of the refrigeration room;

[0025] Step 2: Compare the indoor humidity RH of the refrigeration room with the preset humidity range;

[0026] Step 3: If the indoor humidity RH of the refrigeration room is within the preset humidity range, the humidification fan is controlled to maintain the original state; otherwise, it is determined whether the indoor humidity RH of the refrigeration room satisfies: | indoor humidity RH of the refrigeration room - preset maximum humidity RH 高 |≤Preset humidity error RH 差 , or, | Refrigeration room indoor humidity RH - preset minimum humidity RH 低 |≤Preset humidity error RH 差 ;

[0027] Step 4: If one of the above two conditions is satisfied, further determine whether the situation in which one of the above two conditions is satisfied is maintained for a preset time t 预 , if so, the humidification fan is controlled to change state.

[0028] When obtaining the indoor humidity RH of the refrigeration room, the humidification fan may be in two states: working state and shutdown state.

[0029] When the indoor humidity RH of the refrigeration room is compared with the preset humidity range, there may be three situations: indoor humidity RH of the refrigeration room > preset maximum humidity RH 高 , preset minimum humidity RH low ≤ refrigeration room indoor humidity RH ≤ preset maximum humidity RH 高 (i.e. the indoor humidity RH of the refrigeration room is within the preset humidity range), the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH 低 .

[0030] This means that after obtaining the indoor humidity RH of the refrigeration room, there are six situations for the refrigeration equipment:

[0031] Refrigeration room indoor humidity RH>preset maximum humidity RH 高 The humidification fan is in operation, or the minimum humidity RH is preset. 低 ≤ Refrigeration room indoor humidity RH ≤ preset maximum humidity RH 高 The humidifying fan is in operation, or the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH. 低 The humidifying fan is in operation, or the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH. 高 The humidification fan is in shutdown state, or the preset minimum humidity RH 低 ≤ Refrigeration room indoor humidity RH ≤ preset maximum humidity RH 高 The humidifying fan is in shutdown state, or the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH. 低 And the humidification fan is in the stopped state.

[0032] In the above six situations, no matter the humidification fan is in operation or shutdown, as long as the preset minimum humidity RH is met 低 ≤ Refrigeration room indoor humidity RH ≤ preset maximum humidity RH 高 In this case, that is, as long as the indoor humidity RH of the refrigeration room is within the preset humidity range, the humidifying fan will not affect the indoor humidity RH of the refrigeration room while maintaining this state, and no adjustment is required until the indoor humidity RH of the refrigeration room changes and further judgment is required.

[0033] When the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH 低 At this time, the indoor humidity RH of the refrigeration room is low, and the humidification fan is needed to drive the air flow to increase the humidity. If the humidification fan is in working state at this time, the humidification fan will be kept in working state at this time to humidify the refrigeration room, and there is no need to consider the problem of humidification fan state change.

[0034] When the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 At this time, the indoor humidity RH of the refrigeration room is high, and there is no need for the humidification fan to work to humidify. If the humidification fan happens to be in the shutdown state at this time, the humidification fan will be kept in the shutdown state at this time to make the humidity in the refrigeration room gradually decrease. There is no need to consider the problem of the change of the humidification fan state.

[0035] Only when the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 , that is, when the humidity is high and the humidifying fan is in working state, it is possible to switch the humidifying fan from working state to shutdown state to avoid the continuous increase of indoor humidity RH in the refrigeration room; or, when the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH 低 , that is, when the humidity is low and the humidifying fan is in the shutdown state, it is possible to switch the humidifying fan from the shutdown state to the working state to increase the indoor humidity RH of the refrigeration room. That is, only when the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 The humidifying fan is in working state, and the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH 低 And the humidification fan is in the shutdown state. In these two cases, the humidification fan needs to be switched.

[0036] In step 3, if the indoor humidity RH of the refrigeration room is not within the preset humidity range, there are two situations: the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH. 低 , or, the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 As mentioned above, the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH. 低 When the humidification fan is in shutdown state; the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH高 When the humidification fan is in working state, there is a situation where the humidification fan needs to be switched. The following two situations are analyzed in detail.

[0037] When the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH 低 , and the humidification fan is in the stopped state:

[0038] In step 3, select the refrigeration room indoor humidity RH and the preset minimum humidity RH 低 The absolute value of the difference between the preset humidity error RH 差 By contrast, due to the preset minimum humidity RH 低 > Refrigeration room indoor humidity RH, that is, to determine whether it meets the preset minimum humidity RH 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 If it is satisfied, it means that the indoor RH of the refrigeration room is consistent with the preset minimum humidity RH 低 The difference is small, less than the preset humidity error RH 差 , which may be caused by the fluctuation of the indoor humidity RH in the refrigeration room, and further judgment needs to be made in step 4; if it is not satisfied, it can be known that the indoor humidity RH in the refrigeration room is lower than the preset minimum humidity RH 低 If the difference is large, it is judged that the indoor humidity RH of the refrigeration room has indeed dropped to the preset minimum humidity RH. 低 Next, the state of the humidification fan needs to be switched, that is, from the shutdown state to the working state, to humidify the refrigeration room.

[0039] In step 4, when the preset minimum humidity RH is met 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 If the preset minimum humidity RH 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 This situation can last for a preset time t 预 , it can be judged that the indoor humidity RH of the refrigeration room has indeed dropped to the preset minimum humidity RH 低 Below, rather than due to fluctuations below the preset minimum humidity RH for a short period of time 低 , it is necessary to switch the humidification fan state and change it to working state to start humidification.

[0040] If the preset minimum humidity RH 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 Failure to maintain the preset time t 预 , then at the preset time t 预 There may be two situations: preset minimum humidity RH 低 - Refrigeration room indoor humidity RH>preset humidity error RH差 , that is, the indoor humidity RH of the refrigeration room gradually decreases to the preset minimum humidity RH 低 The difference is large; the indoor humidity RH of the refrigeration room is greater than the preset minimum humidity RH 低 , that is, the indoor humidity RH of the refrigeration room fluctuates back to the preset humidity range. No matter which of the two situations it is, just go back to step 2 to make a new judgment.

[0041] Preferably, the humidity error RH is preset 差 1%, refrigeration room indoor humidity RH and preset minimum humidity RH 低 If the absolute value of the difference is less than 1%, it is very likely that the indoor humidity RH of the refrigeration room fluctuates, causing the indoor humidity RH of the refrigeration room to temporarily fall below the preset minimum humidity RH. 低 If the indoor humidity RH of the refrigeration room fluctuates, the humidifying fan may not be switched to the working state at this time. Therefore, in order to avoid the humidifying fan from frequently switching its state due to humidity fluctuations, further judgment is required. Of course, the preset humidity error RH may also fluctuate within a small range of 1%, such as 0.5%.

[0042] Preferably, the preset time t 预 The time is 3 minutes. During this time, it can be judged whether the indoor humidity RH of the refrigeration room is outside the preset temperature range due to fluctuations, and it can also prevent the indoor humidity RH of the refrigeration room from being lower than the preset minimum humidity RH. 低 In this case, the humidity reduction time is too long, and the humidity reduction is too large, so that the humidity RH is too low during the cooling time.

[0043] When the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 , and the humidifying fan is in operation:

[0044] In step 3, select the refrigeration room indoor humidity RH and the preset maximum humidity RH 高 The absolute value of the difference between the preset humidity error RH 差 In contrast, and because the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 , that is, to determine whether the following conditions are met: Refrigeration room indoor humidity RH - preset maximum humidity RH 高 ≤Preset humidity error RH 差 If it is satisfied, it means that the indoor RH of the refrigeration room is consistent with the preset maximum humidity RH 高 The difference is small, less than the preset humidity error RH 差 , which may be caused by the fluctuation of the indoor humidity RH in the refrigeration room, and further judgment needs to be made in step 4; if it is not satisfied, it can be known that the indoor humidity RH in the refrigeration room is higher than the preset maximum humidity RH 高And the difference is large, so it is necessary to switch the state of the humidification fan, that is, from the working state to the shutdown state, to stop the increase of the indoor humidity RH in the refrigeration room.

[0045] In step 4, when the indoor humidity of the refrigeration room RH-preset maximum humidity RH is met, 高 ≤Preset humidity error RH 差 In the case of cooling room indoor humidity RH-preset maximum humidity RH 高 ≤Preset humidity error RH 差 This situation can last for a preset time t 预 , it can be judged that the indoor humidity RH of the refrigeration room has indeed risen to the preset maximum humidity RH 高 above, rather than due to fluctuations above the preset maximum humidity RH for a short period of time 高 , it is necessary to switch the humidification fan state to the shutdown state to prevent the humidity from rising.

[0046] If the indoor humidity of the refrigeration room is RH-preset maximum humidity RH 高 ≤Preset humidity error RH 差 Failure to maintain the preset time t 预 , then at the preset time t 预 There may be two situations: indoor humidity RH of the refrigeration room - preset maximum humidity RH 高 >Preset humidity error RH 差 , that is, the indoor humidity RH of the refrigeration room gradually increases to the preset maximum humidity RH 高 There is a big difference; the indoor humidity RH of the refrigeration room is less than the preset maximum humidity RH 高 , that is, the indoor humidity RH of the refrigeration room fluctuates back to the preset humidity range. No matter which of the two situations it is, just go back to step 2 to make a new judgment.

[0047] In step 4, if one of the two conditions in step 3 is satisfied but does not last for the preset time t 预 , the indoor humidity RH of the refrigeration room is greater than the preset maximum humidity RH 高 As an example, when the fan is in working state, there may be two situations as mentioned above: indoor humidity RH of the refrigeration room - preset maximum humidity RH 高 >Preset humidity error RH 差 , or, the indoor humidity RH of the refrigeration room is less than the preset maximum humidity RH 高 .

[0048] If the indoor humidity of the refrigeration room is RH-preset maximum humidity RH 高 >Preset humidity error RH 差 , return to step 2 to make a new judgment, then when executing step 3, the humidification fan needs to be switched from the working state to the shutdown state.

[0049] If the indoor humidity RH of the refrigeration room is less than the preset maximum humidity RH 高 , return to step 2 and make a new judgment. At this time, the indoor humidity RH of the refrigeration room is within the preset humidity range, and the state of the humidification fan does not need to be changed.

[0050] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0051] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for controlling the opening and closing of a humidifying fan in a refrigeration device, wherein the humidifying fan includes a working state and a shutdown state, characterized in that: The steps include: Step 1: Obtain the indoor humidity RH of the refrigeration room; Step 2: Compare the indoor humidity RH of the refrigeration room with the preset humidity range; Step 3: If the indoor humidity RH of the refrigeration room is within the preset humidity range, the humidification fan is controlled to maintain the original state; otherwise, it is determined whether the indoor humidity RH of the refrigeration room satisfies: | indoor humidity RH of the refrigeration room - preset maximum humidity RH 高 |≤Preset humidity error RH 差 , or, | Refrigeration room indoor humidity RH - preset minimum humidity RH 低 |≤Preset humidity error RH 差 ; Step 4: If one of the two conditions in step 3 is satisfied, further determine whether the condition that one of the two conditions is satisfied is maintained for a preset time t 预 , if so, the humidification fan is controlled to change state.

2. The method for controlling the opening and closing of the humidification fan in the refrigeration equipment according to claim 1, characterized in that: In step 4, it is determined whether the above two conditions are met for a preset time t 预 If one of the above two conditions is not maintained for the preset time t 预 , then return to step 2.

3. The method for controlling the opening and closing of a humidifying fan in a refrigeration device according to claim 1, characterized in that: If the humidifying fan is in the shutdown state when obtaining the indoor humidity RH of the refrigeration room, then in step 2, the indoor humidity RH of the refrigeration room is compared with the preset minimum humidity RH. 低 Compare; in step 3, if the indoor humidity RH of the refrigeration room ≥ the preset minimum humidity RH 低 , then the humidification fan is controlled to remain in the shutdown state, otherwise proceed to the next step.

4. The method for controlling the opening and closing of the humidification fan in the refrigeration equipment according to claim 3, characterized in that: In step 3, if the indoor humidity RH of the refrigeration room is less than the preset minimum humidity RH 低 , then determine whether the indoor humidity RH of the refrigeration room meets the preset minimum humidity RH 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 If yes, go to step 4, otherwise control the humidification fan to change from shutdown state to working state.

5. The method for controlling the opening and closing of the humidification fan in the refrigeration equipment according to claim 4, characterized in that: In step 4, if the preset minimum humidity RH 低 - Refrigeration room indoor humidity RH ≤ preset humidity error RH 差 Maintain the preset time t 预 , then the humidification fan is controlled to change from the shutdown state to the working state.

6. The method for controlling the opening and closing of a humidifying fan in a refrigeration device according to claim 1, characterized in that: If the humidifying fan is in operation when obtaining the indoor humidity RH of the refrigeration room, then in step 2, the indoor humidity RH of the refrigeration room is compared with the preset maximum humidity RH. 高 Compare; in step 3, if the indoor humidity RH of the refrigeration room is less than the preset maximum humidity RH 高 , then the humidification fan is still in working state, otherwise proceed to the next step.

7. The method for controlling the opening and closing of a humidifying fan in a refrigeration device according to claim 6, characterized in that: In step 3, if the indoor humidity RH of the cooling room is greater than the preset maximum humidity RH 高 , then determine whether the indoor humidity RH of the refrigeration room meets: indoor humidity RH of the refrigeration room - preset maximum humidity RH 高 ≤Preset humidity error RH 差 If yes, go to step 4, otherwise control the humidification fan to change from working state to shutdown state.

8. The method for controlling the opening and closing of a humidifying fan in a refrigeration device according to claim 7, characterized in that: In step 4, if the indoor humidity of the cooling room RH-preset maximum humidity RH 高 ≤Preset humidity error RH 差 Maintain the preset time t 预 , then the humidification fan is controlled to change from the working state to the shutdown state.

9. The method for controlling the opening and closing of a humidifying fan in a refrigeration device according to any one of claims 1 to 8, characterized in that: Preset time t 预 For 3 minutes.

10. The method for controlling the opening and closing of a humidifying fan in a refrigeration device according to claim 9, characterized in that: Preset humidity error RH 差 is 1%.

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