Temperature control method of refrigeration equipment

Abstract

The invention provides a temperature control method of refrigeration equipment. The temperature control method comprises the following steps: acquiring a power-on instruction of the refrigeration equipment; controlling the compressor to operate at the ith gear, and starting to count the startup and shutdown times of the compressor to obtain the startup and shutdown times SA of the compressor; the compressor starting and stopping frequency SA is compared with the preset compressor starting and stopping frequency SA pre-i of the ith gear, and when the compressor starting and stopping frequency SA reaches the preset compressor starting and stopping frequency SA pre-i of the ith gear, the compressor is controlled to be switched to the (i + 1) th gear to operate; wherein the frequency of the (i + 1) th gear is lower than that of the ith gear. According to the temperature control method provided by the invention, after the compressor operates at one gear for the upper limit times of the gear, downshift setting is carried out, so that the working frequency of the compressor is reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a temperature control method for refrigeration equipment. Background Art

[0002] At present, in terms of refrigeration control, the refrigerators, ice bars, freezers, and freezers on the market always operate in a single mode according to the set gear regardless of whether the door is opened to take out or put in items, or how much is loaded in the box (for example, the freezer TON = -18°C, T OFF =-22℃), it cannot be automatically adjusted according to the actual usage of the user's refrigerator, and the actual energy consumption is relatively high. Summary of the invention

[0003] The purpose of the present invention is to provide a temperature control method for refrigeration equipment. After the compressor runs at a fixed gear for a set number of times, it switches to a gear with a lower frequency to reduce the energy consumption of the refrigeration equipment during the refrigeration process, thereby solving the problem in the prior art that the compressor runs in a single mode and the actual energy consumption is relatively high.

[0004] In order to achieve one of the above-mentioned purposes of the invention, an embodiment of the present invention provides a temperature control method for a refrigeration device, comprising the following steps:

[0005] Obtain power-on instructions for the refrigeration equipment;

[0006] Control the compressor to run at the i-th gear, and start counting the number of times the compressor is turned on and off to obtain the number of times the compressor is turned on and off S A ;

[0007] Set the compressor start and stop times S A The preset compressor start and stop times S for the i-th gear A预i For comparison, when the compressor starts and stops times S A The preset number of compressor starts and stops S at the i-th gear A预i When , the compressor is controlled to switch to the i+1th gear;

[0008] Among them, the frequency of the i+1th gear is lower than the frequency of the ith gear.

[0009] As a further improvement of an embodiment of the present invention, during the cycle of starting and stopping the compressor, if it is detected that the door is opened and closed, the working time t of the compressor in the first working cycle of the compressor after the door is closed is detected. A The working time of the compressor in the first working cycle of the compressor after the door is closed is t A With t 高 and t 低 Make comparisons;

[0010] IfA ≥t 高 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate in the first gear;

[0011] If 低 <t A <t 高 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate at the second gear;

[0012] If A ≤t 低 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate at the third gear;

[0013] Among them, t 高 The running time of the compressor when the load is 80% of the total load and the compressor runs in the first gear for one cycle, t 低 It is the running time of the compressor when the load is 30% of the total load and the compressor runs for one cycle in the third gear.

[0014] As a further improvement of an embodiment of the present invention, if t A ≥t 高 , the counting starts from the second working cycle of the compressor after the door is closed. When the compressor starts and stops times S A When it reaches 4-8 times, the compressor is controlled to switch to the second gear.

[0015] As a further improvement of an embodiment of the present invention, if t 低 <t A <t 高 , the counting starts from the second working cycle of the compressor after the door is closed. When the compressor starts and stops times S A When it reaches 2-4 times, the compressor is controlled to switch to the third gear.

[0016] As a further improvement of an embodiment of the present invention, the compressor working gear includes a first gear to a third gear.

[0017] As a further improvement of an embodiment of the present invention, if the door is not opened, when the compressor is switched to the third gear, the compressor always runs at the third gear.

[0018] As a further improvement of an embodiment of the present invention, the settings of the corresponding frequencies of the first gear and the second gear of the compressor increase with the increase of the ambient temperature AT, and the frequency of the third gear is a constant value.

[0019] As a further improvement of one embodiment of the present invention, when AT≤13, the frequency of the first gear is 60 Hz, and the frequency of the second gear is 50 Hz; when 13<AT≤23, the frequency of the first gear is 90 Hz, and the frequency of the second gear is 54 Hz; when 23<AT≤28, the frequency of the first gear is 108 Hz, and the frequency of the second gear is 60 Hz; when 28<AT≤35, the frequency of the first gear is 120 Hz, and the frequency of the second gear is 70 Hz; when AT>35, the frequency of the first gear is 128 Hz, and the frequency of the second gear is 78 Hz; the frequency of the third gear is 40 Hz.

[0020] As a further improvement of an embodiment of the present invention, the preset compressor start-stop times S of the i-th gear is A预i Increases with the increase of ambient temperature.

[0021] As a further improvement of an embodiment of the present invention, when AT≤13, the preset number of compressor start-stop times S of the first gear is A预1 is 4; when 13<AT≤23, the preset compressor start and stop times S of the first gear A预1 is 5; when 23<AT≤28, the preset compressor start and stop times S of the first gear A预1 is 6; when 28<AT≤35, the preset compressor start and stop times S of the first gear A预1 is 7; when AT>35, the preset compressor start and stop times S of the first gear A预1 is 8;

[0022] When AT≤23, the preset compressor start and stop times S of the second gear A预2 is 2; when 23<AT≤35, the preset compressor start and stop times S of the second gear A预2 When AT>35, the preset compressor start and stop times S of the second gear A预2 is 4.

[0023] As a further improvement of an embodiment of the present invention, after the door is opened or the gear is switched, the compressor is started and stopped times S A Reset to zero and count the number of compressor starts and stops again.

[0024] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0025] The temperature control method of the refrigeration equipment provided by the present invention sets the operation at the i-th gear after the refrigeration equipment is powered on. After the i-th gear has run for a preset number of compressor starts and stops, the temperature control method switches to the i+1-th gear with a lower frequency, thereby reducing the operating frequency of the compressor and thus reducing the energy consumption of the refrigeration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of a temperature control method for a refrigeration device in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] 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.

[0028] Terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings.

[0029] For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Furthermore, it should be understood that although the terms first, second, etc. may be used herein to describe various elements or structures, these described objects should not be limited by these terms. These terms are only used to distinguish these described objects from each other. For example, the first gear may be referred to as the second gear, and similarly the second gear may also be referred to as the first gear, which does not deviate from the scope of protection of the present application.

[0032] The embodiment of the present invention provides a temperature control method for a refrigeration device, such as Figure 1 As shown, the following steps are included:

[0033] Obtain power-on instructions for the refrigeration equipment;

[0034] Control the compressor to run at the i-th gear, and start counting the number of times the compressor is turned on and off to obtain the number of times the compressor is turned on and off S A ;

[0035] Set the compressor start and stop times S A The preset compressor start and stop times S for the i-th gear A预i For comparison, when the compressor starts and stops times S A The preset number of compressor starts and stops S at the i-th gear A预i When , the compressor is controlled to switch to the i+1th gear;

[0036] Among them, the frequency of the i+1th gear is lower than the frequency of the ith gear.

[0037] After the refrigeration equipment is powered on, the compressor needs to start running. When the refrigeration equipment is initially powered on, since the indoor temperature of the refrigeration room is consistent with the outside temperature, which is greatly different from the preset temperature in the refrigeration room, a large power is required to quickly lower the temperature. Preferably, when the refrigeration equipment is initially powered on, the compressor runs at the first gear with the highest frequency.

[0038] When the compressor is running at the i-th gear, such as the first gear mentioned above, the number of starts and stops of the compressor begins to be counted, or in other words, the number of working cycles of the compressor begins to be counted, and the number of starts and stops of the compressor is recorded as S A Each gear is set with an upper limit of the number of compressor starts and stops when the compressor is running in the gear according to the compressor frequency of the gear, that is, the preset number of compressor starts and stops S of the i-th gear A预i , when the compressor is running in the first gear, the number of compressor starts and stops S A The preset number of compressor starts and stops S to reach the first gear A预1 When the compressor is switched to the second gear which is one level lower than the first gear frequency, the energy consumption of the compressor can be reduced.

[0039] After the compressor switches to the second gear, the compressor starts and stops times S A Reset to zero and restart the compressor start and stop times S when the compressor is running in the second gear A The number of compressor starts and stops when the compressor is running in the second gear is S A The preset number of compressor starts and stops to reach the second gear S A预2 When the compressor is switched to the third gear, which is one level lower than the second gear frequency.

[0040] This cycle is repeated until the compressor gear is switched to the gear with the lowest frequency, and the compressor gear is no longer switched. After switching to the lowest gear, since the compressor can no longer switch to a lower gear, there is no need to count the number of times the compressor is started and stopped, and the compressor can be controlled to continue running at the lowest gear.

[0041] Preferably, the working gears of the compressor include the first gear, the second gear, and the third gear, and the frequencies of the aforementioned gears are successively reduced. Of course, the fourth gear, the fifth gear, etc. can also be set according to the total load of the refrigeration room, the ambient temperature, etc.

[0042] When the compressor is cycled through the start-up and shutdown steps using the aforementioned control method, if the door is opened, the working time t of the compressor in the first working cycle of the compressor after the door is closed is detected. A The working time of the compressor in the first working cycle of the compressor after the door is closed is t A With t 高 and t 低 Make comparisons;

[0043] If A ≥t 高 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate in the first gear;

[0044] If 低 <tA<t 高 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate at the second gear;

[0045] If A ≤t 低 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate at the third gear;

[0046] Among them, t 高 The running time of the compressor when the load is 80% of the total load and the compressor runs in the first gear for one cycle, t 低 It is the running time of the compressor when the load is 30% of the total load and the compressor runs for one cycle in the third gear.

[0047] After the door is opened, items placed in the refrigeration room may be taken out, reducing the load in the refrigeration room, or users may put items into the refrigeration room, increasing the load in the refrigeration room. The aforementioned balance is no longer maintained in the refrigeration room, and the working gear of the compressor needs to be adjusted.

[0048] Detect the working time t of the compressor in the first working cycle of the compressor after the door is closed A, in the first working cycle of the compressor after the door is closed, the working time of the compressor is t A It can reflect the change of the refrigeration compartment load caused by the door opening. A ≥t 高 , then in the first working cycle of the compressor after the door is closed, the compressor working time t A If the door opening time is too long, and the compressor runs longer than the time when the load in the refrigeration room is 80% of the total load and the compressor runs in the first gear in one cycle, it is judged that the load of the refrigeration room has increased due to the door opening, and the compressor needs to work at a high frequency and switch to the first gear to achieve temperature control in the refrigeration room.

[0049] If A ≤t 低 , then in the first working cycle of the compressor after the door is closed, the compressor working time t A If the door opening time is shorter than that of the load in the refrigeration room when it is only 30% of the total load, and the compressor runs in the third gear for one cycle, it is judged that the load in the refrigeration room is reduced due to the door opening, and the compressor works at a lower frequency. Switching to the third gear can realize the temperature control in the refrigeration room.

[0050] If 低 <t A <t 高 , then in the first working cycle of the compressor after the door is closed, the compressor working time t A Moderate, this time the door is opened, maybe not too many items are taken out or put in, so the load in the refrigeration room does not change much, or this time the door is opened, no items are taken out or put in, and the compressor does not need to run for too long in the first working cycle of the compressor after the door is closed. Therefore, the frequency of the compressor is switched to the medium second gear.

[0051] After the door is opened and closed, the compressor is adjusted as above, and the compressor is restored to the control method after the refrigeration equipment is powered on at this gear, that is, after switching to the corresponding gear, the compressor start and stop times are counted again, and the gear switching of the compressor in the second working cycle after the door is closed, that is, the second working cycle after the door is closed is recorded as the first compressor start and stop under this gear. The specific method is as follows:

[0052] If A ≥t 高 , the counting starts from the second working cycle of the compressor after the door is closed. When the compressor starts and stops times S A The preset number of compressor starts and stops S to reach the first gear A预1 When the compressor is switched to the second gear,

[0053] If 低 <t A <t 高 , the counting starts from the second working cycle of the compressor after the door is closed. When the compressor starts and stops times S A The preset number of compressor starts and stops to reach the second gear S A预2 When the compressor is switched to the third gear,

[0054] If A ≤t 低 At this time, the compressor is already in the third gear with the lowest frequency. There is no need to count the number of times the compressor is started and stopped, and the compressor can be kept running in the third gear.

[0055] Furthermore, the settings of the corresponding frequencies of the first and second gears of the compressor increase with the increase of the ambient temperature AT, and the frequency of the third gear is a fixed value. Specifically:

[0056] When AT≤13, the frequency of the first gear is 60Hz, and the frequency of the second gear is 50Hz; when 13<AT≤23, the frequency of the first gear is 90Hz, and the frequency of the second gear is 54Hz; when 23<AT≤28, the frequency of the first gear is 108Hz, and the frequency of the second gear is 60Hz; when 28<AT≤35, the frequency of the first gear is 120Hz, and the frequency of the second gear is 70Hz; when AT>35, the frequency of the first gear is 128Hz, and the frequency of the second gear is 78Hz; the frequency of the third gear is 40Hz.

[0057] Furthermore, the preset compressor start and stop times S of the i-th gear A预i Increases with the increase of ambient temperature. Specific:

[0058] When AT≤13, the preset compressor start and stop times S of the first gear A预1 is 4; when 13<AT≤23, the preset compressor start and stop times S of the first gear A预1 is 5; when 23<AT≤28, the preset compressor start and stop times S of the first gear A预1 is 6; when 28<AT≤35, the preset compressor start and stop times S of the first gear A预1 is 7; when AT>35, the preset compressor start and stop times S of the first gear A预1 is 8.

[0059] When AT≤23, the preset compressor start and stop times S of the second gear A预2 is 2; when 23<AT≤35, the preset compressor start and stop times S of the second gear A预2When AT>35, the preset compressor start and stop times S of the second gear A预2 is 4.

[0060] 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.

[0061] 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 temperature control method for refrigeration equipment, characterized in that: The steps include: Obtain power-on instructions for the refrigeration equipment; Control the compressor to run at the i-th gear, and start counting the number of times the compressor is turned on and off to obtain the number of times the compressor is turned on and off S A ; Set the compressor start and stop times S A The preset compressor start and stop times S for the i-th gear A预i For comparison, when the compressor starts and stops times S A The preset number of compressor starts and stops S at the i-th gear A预i When , the compressor is controlled to switch to the i+1th gear; Among them, the frequency of the i+1th gear is lower than the frequency of the ith gear.

2. The temperature control method of refrigeration equipment according to claim 1, characterized in that: During the compressor startup and shutdown cycle, if the door is detected to be opened and closed, the working time t of the compressor in the first working cycle of the compressor after the door is closed is detected. A The working time of the compressor in the first working cycle of the compressor after the door is closed is t A With t 高 and t 低 Make comparisons; If A ≥t 高 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate in the first gear; If 低 <t A <t 高 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate at the second gear; If A ≤t 低 , then in the second working cycle of the compressor after the door is closed, the compressor is controlled to operate at the third gear; Among them, t 高 The running time of the compressor when the load is 80% of the total load and the compressor runs in the first gear for one cycle, t 低 It is the running time of the compressor when the load is 30% of the total load and the compressor runs for one cycle in the third gear.

3. The temperature control method for refrigeration equipment according to claim 2, characterized in that: If A ≥t 高 , the counting starts from the second working cycle of the compressor after the door is closed. When the compressor starts and stops times S A When it reaches 4-8 times, the compressor is controlled to switch to the second gear.

4. The temperature control method for refrigeration equipment according to claim 2, characterized in that: If 低 <t A <t 高 , the counting starts from the second working cycle of the compressor after the door is closed. When the compressor starts and stops times S A When it reaches 2-4 times, the compressor is controlled to switch to the third gear.

5. The temperature control method for refrigeration equipment according to claim 1, characterized in that: The compressor working gear includes the first gear to the third gear.

6. The temperature control method for refrigeration equipment according to claim 5, characterized in that: If the door is not opened, when the compressor is switched to the third gear, the compressor always runs at the third gear.

7. The temperature control method for refrigeration equipment according to claim 5, characterized in that: The settings of the corresponding frequencies of the first and second gears of the compressor increase with the increase of the ambient temperature AT, and the frequency of the third gear is a fixed value.

8. The temperature control method for refrigeration equipment according to claim 7, characterized in that: When AT≤13, the frequency of the first gear is 60Hz, and the frequency of the second gear is 50Hz; when 13<AT≤23, the frequency of the first gear is 90Hz, and the frequency of the second gear is 54Hz; when 23<AT≤28, the frequency of the first gear is 108Hz, and the frequency of the second gear is 60Hz; when 28<AT≤35, the frequency of the first gear is 120Hz, and the frequency of the second gear is 70Hz; when AT>35, the frequency of the first gear is 128Hz, and the frequency of the second gear is 78Hz; the frequency of the third gear is 40Hz.

9. The temperature control method for refrigeration equipment according to claim 5, characterized in that: The preset compressor start and stop times S for the i-th gear A预i Increases with the increase of ambient temperature.

10. The temperature control method for refrigeration equipment according to claim 9, characterized in that: When AT≤13, the preset compressor start and stop times S of the first gear A预1 is 4; when 13<AT≤23, the preset compressor start and stop times S of the first gear A预1 is 5; when 23<AT≤28, the preset compressor start and stop times S of the first gear A预1 is 6; when 28<AT≤35, the preset compressor start and stop times S of the first gear A预1 is 7; when AT>35, the preset compressor start and stop times S of the first gear A预1 is 8; When AT≤23, the preset compressor start and stop times S of the second gear A预2 is 2; when 23<AT≤35, the preset compressor start and stop times S of the second gear A预2 When AT>35, the preset compressor start and stop times S of the second gear A预2 is 4.

11. The temperature control method of refrigeration equipment according to claim 2, characterized in that: After the door is opened or the gear is switched, the compressor starts and stops times S A Reset to zero and count the number of compressor starts and stops again.

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