A method, device and refrigeration equipment for controlling thermal fluorination defrosting

Abstract

The present invention discloses a thermal fluorine defrosting control method, device and refrigeration equipment, which relates to the field of air conditioning and solves the problem that the existing technology uses refrigerant to defrost the evaporator in the tube, and the drain pipe is blocked by ice and cannot drain. The thermal fluorine defrosting control method of the present invention includes the following steps: obtaining the parameters required to determine whether the refrigeration equipment meets the defrosting entry conditions; determining whether the refrigeration equipment meets the defrosting entry conditions, and when the refrigeration equipment meets the defrosting entry conditions, controlling the four-way valve to switch to the defrosting mode; obtaining the cold storage temperature, when T 库温 >T 库温预设1 When T 库温 ≤T 库温预设1 When the electric heating device in the water tray is controlled to be turned on, the refrigeration equipment enters the thermal fluorine defrosting mode. This method can ensure the smooth drainage of the water tray, and also has the advantages of short defrosting time, energy saving and reduced storage temperature fluctuation.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, and in particular to a thermal fluorination defrosting control method, device and refrigeration equipment. Background Art

[0002] At present, conventional low-temperature cold storages all use electric defrosting to defrost the evaporator of the refrigeration system, that is, electric heating devices are arranged in the evaporator and the water tray. Since the temperature in the cold storage is relatively low, generally -18°C, when the cold storage is in operation, the surface of the evaporator is frosted and no condensed water flows out; when the unit reaches the defrosting condition, the electric heating device starts to defrost the evaporator, and the defrosted water is discharged through the drain port of the water tray. However, the use of electric heating devices for defrosting has at least the following defects: (1) The defrosting time is long, generally about 30 minutes; (2) The electric heating device in the water tray and the electric heating device in the evaporator are turned on at the same time, and the surface temperatures of the two electric heating devices rise at the same time. When defrosting water flows out, the electric heating device in the water tray has been turned on for a period of time. At this time, the defrosting water is not easy to freeze on the surface of the water tray. However, since the electric heating device in the water tray is turned on for too long, this method not only consumes a lot of energy, but also causes the warehouse temperature to rise and the warehouse temperature fluctuates greatly.

[0003] In the prior art, a low-temperature hot fluorine series refrigeration unit has been developed, which uses high-temperature and high-pressure refrigerant to defrost the evaporator in the tube; an electric heating device is arranged in the water receiving tray, and the temperature in the water receiving tray is increased by the electric heating device. When the unit reaches the defrosting condition, the high-temperature and high-pressure refrigerant passes through the evaporator quickly, and the evaporator defrosts quickly, generally about 10 minutes; this defrosting method only requires one electric heating device, and the electric heating time is short, which can reduce energy consumption and reduce warehouse temperature fluctuations. However, the electric heating device in the water receiving tray has a slow heating temperature, and the surface temperature of the water receiving tray is consistent with the warehouse temperature (-18°C). When the defrosting water flows down, it is easy to freeze on the surface of the water receiving tray, causing the drain pipe to be blocked by ice and unable to drain.

[0004] Therefore, there is an urgent need to improve the defrosting method of the cold storage refrigeration system in the prior art. Summary of the invention

[0005] One of the purposes of the present invention is to provide a thermal fluorine defrosting control method, which solves the technical problem that the drainage pipe is blocked by ice and cannot be drained when the refrigerant is used to defrost the evaporator in the prior art. The many technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The thermal fluorination frost control method of the present invention comprises the following steps:

[0008] Obtain the parameters required to determine whether the refrigeration equipment meets the defrost entry conditions;

[0009] Determine whether the refrigeration equipment meets the defrost entry conditions. When the refrigeration equipment meets the defrost entry conditions, control the four-way valve to switch to the defrost mode, and shut down the compressor after working for a preset time;

[0010] Get the cold storage temperature, and compare the obtained cold storage temperature with the first preset cold storage temperature. 库温 >T 库温预设1 When T is on, the electric heating device in the water tray is turned off, the compressor starts, and the refrigeration equipment enters the hot fluorine defrosting mode; 库温 ≤T 库温预设1 When the electric heating device in the water tray is controlled to be turned on and preheat the water tray, the compressor starts and the refrigeration equipment enters the hot fluorine defrosting mode; wherein, T 库温 is the real-time temperature of the cold storage, T 库温预设1 It is the first preset cold storage temperature.

[0011] According to a preferred embodiment, controlling the electric heating device in the water receiving tray to be in an on state further includes the following steps:

[0012] Obtain the duration of time the electric heating device is in the on state;

[0013] The acquired time duration that the electric heating device is in the on state is compared with the defrosting preheating time duration, and based on the comparison result, the refrigeration equipment is controlled to enter the thermal fluorine defrosting mode.

[0014] According to a preferred embodiment, when t 开启 ≥t 化霜预热 When the refrigeration equipment is controlled to enter the thermal defrosting mode;

[0015] When t 开启 <t 化霜预热 When the electric heating device is controlled to run for no less than t 化霜预热 ;

[0016] Among them, t 开启 is the time that the electric heating device is turned on, t 化霜预热 The preheating time required for the drip tray.

[0017] According to a preferred embodiment, t 化霜预热 Calculate according to the following formula: 化霜预热 =D1-K1*T 库温 , where D1 is the preset preheating time of the water tray, and K1 is the preheating ratio coefficient of the water tray.

[0018] According to a preferred embodiment, when t 化霜预热 >t max When t化霜预热 The value of t max ;

[0019] When t 化霜预热 <t min When t 化霜预热 The value of t min ;

[0020] When t min ≤t 化霜预热 ≤t max When t 化霜预热 =D1-K1*T 库温 ;

[0021] Among them, t min The minimum preheating time required for defrosting the water tray, t max The maximum preheating time required to defrost the drip tray.

[0022] According to a preferred embodiment, whether the refrigeration equipment meets the defrosting entry conditions is determined by the following steps:

[0023] Get the cold storage temperature, compressor operation time and evaporator temperature;

[0024] Based on the obtained cold storage temperature, compressor operation time and evaporator temperature, it is determined whether the refrigeration equipment meets the defrosting entry conditions.

[0025] According to a preferred embodiment, the defrosting entry condition of the refrigeration equipment is:

[0026] T 库温 <T 库温预设2 , and t 运行 ≥t 预设 , and T 蒸发 ≤(T 库温 -T 预设温差1 ),

[0027] Among them, T 库温预设2 is the second preset cold storage temperature, t 运行 is the actual time that the four-way valve is in the defrosting state, t 预设 T is the preset time for the four-way valve to be in defrosting state. 蒸发 is the real-time temperature of the evaporator, T 预设温差1 It is the first preset temperature difference.

[0028] According to a preferred embodiment, after the refrigeration device enters the thermal fluorination defrosting mode, it also includes the following steps:

[0029] Get the temperature of the evaporator, the time the four-way valve is in defrost mode, or the temperature of the condenser;

[0030] Based on the acquired evaporator temperature, the length of time the four-way valve is in the defrost state or the condenser temperature, determine whether the refrigeration equipment meets the defrost exit conditions. When the refrigeration equipment meets the defrost exit conditions, control the four-way valve to switch to the refrigeration mode.

[0031] According to a preferred embodiment, the first defrost exit condition of the refrigeration equipment is: the evaporator temperature is detected to meet T 蒸发 ≥T 预设化霜终止1 ;

[0032] The second defrost exit condition of the refrigeration equipment is: the actual time of the four-way valve being in the defrost state is detected to meet t 运行 ≥t 预设化霜终止 ;

[0033] The third defrost exit condition of the refrigeration equipment is: after the four-way valve is opened for the second preset time, the temperature of the condenser is detected to meet the following conditions for the third preset time: T 冷凝 ≥T 预设化霜终止2 ;

[0034] Among them, T 蒸发 is the real-time temperature of the evaporator, T 预设化霜终止1 is the first preset defrost termination temperature, t 运行 is the actual time that the four-way valve is in the defrosting state, t 预设化霜终止 is the preset defrost termination time, T 冷凝 is the real-time temperature of the condenser, T 预设化霜终止2 It is the second preset defrost termination temperature.

[0035] According to a preferred embodiment, the defrost exit condition of the refrigeration equipment is determined in the following order: the first defrost exit condition of the refrigeration equipment takes precedence over the second defrost exit condition of the refrigeration equipment, and the second defrost exit condition of the refrigeration equipment takes precedence over the third defrost exit condition of the refrigeration equipment.

[0036] The thermal fluorination frost control method provided by the present invention has at least the following beneficial technical effects:

[0037] The thermal fluorination frost control method of the present invention, when T 库温 >T 库温预设1 When the electric heating device in the water receiving pan is controlled to be in the off state, the refrigeration equipment enters the hot fluorine defrosting mode. At this time, the water receiving pan does not need to be heated, and the defrosting water dripping from the evaporator to the water receiving pan is in a non-ice state, thereby ensuring the smooth drainage of the water receiving pan. At the same time, in this case, since the electric heating device does not need to work, compared with the defrosting technology in the prior art, it has the advantages of short defrosting time, energy saving and avoidance of warehouse temperature fluctuations; on the other hand, when T 库温 ≤T 库温预设1When the electric heating device in the water tray is controlled to be turned on, the refrigeration equipment enters the thermal fluorine defrosting mode, that is, at T 库温 ≤T 库温预设1 When the water pan is heated in advance, the defrosting water dripping from the evaporator to the water pan can be in a non-ice state, thereby ensuring the smooth drainage of the water pan; at the same time, in this case, since only one electric heating device is needed, compared with the defrosting technology using two heaters in the prior art, it has the advantages of short defrosting time, energy saving and reduced warehouse temperature fluctuations, and compared with the defrosting technology using one electric heating device in the prior art, it has the advantage of smooth drainage. That is, the thermal fluorine defrosting control method of the present invention solves the technical problem that the drainage pipe is blocked by ice and cannot be drained when the evaporator is defrosted in the tube using refrigerant in the prior art.

[0038] The second object of the present invention is to provide a thermal fluorination frost control device.

[0039] The thermal fluorination frost control device of the present invention comprises:

[0040] Acquisition module: used to obtain the parameters required to determine whether the refrigeration equipment meets the defrosting entry conditions;

[0041] Judgment module: used to judge whether the refrigeration equipment meets the defrost entry conditions. When the refrigeration equipment meets the defrost entry conditions, the four-way valve is controlled to switch to the defrost mode, and the compressor is turned off after working for a preset time;

[0042] Control module: used to obtain the cold storage temperature and compare the obtained cold storage temperature with the first preset cold storage temperature. 库温 >T 库温预设1 When T is on, the electric heating device in the water tray is turned off, the compressor starts, and the refrigeration equipment enters the hot fluorine defrosting mode; 库温 ≤T 库温预设1 When the electric heating device in the water tray is controlled to be turned on and preheat the water tray, the compressor starts and the refrigeration equipment enters the hot fluorine defrosting mode; wherein, T 库温 is the real-time temperature of the cold storage, T 库温预设1 It is the first preset cold storage temperature.

[0043] The thermal fluorination defrosting control device provided by the present invention has at least the following beneficial technical effects:

[0044] The thermal fluorine defrost control device of the present invention can realize the thermal fluorine defrost control process through the acquisition module, the judgment module and the control module, thereby ensuring the smooth drainage of the water receiving tray, and also has the advantages of short defrosting time, energy saving and reduced warehouse temperature fluctuation.

[0045] The third object of the present invention is to provide a refrigeration device.

[0046] The refrigeration equipment of the present invention comprises:

[0047] One or more memories on which executable programs are stored;

[0048] One or more processors are used to execute the executable program in the memory to implement the steps of the thermal fluorination frost control method described in any technical solution of the present invention.

[0049] The refrigeration equipment provided by the present invention has at least the following beneficial technical effects:

[0050] The refrigeration equipment of the present invention includes one or more memories and one or more processors. Through the functions of the memories and the processors, the steps of the thermal fluorine defrosting control method of any technical solution in the present invention can be implemented, thereby realizing the thermal fluorine defrosting control process, and then ensuring the smoothness of drainage of the water receiving pan. At the same time, it also has the advantages of short defrosting time, energy saving and reduced storage temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 It is a flow chart of a preferred embodiment of the thermal fluorination frost control method of the present invention;

[0053] Figure 2 It is a flow chart of another preferred embodiment of the thermal fluorination frost control method of the present invention;

[0054] Figure 3 It is a module schematic diagram of a preferred embodiment of the thermal fluorination frost control device of the present invention;

[0055] Figure 4 It is a schematic diagram of a module of the refrigeration equipment of the present invention;

[0056] Figure 5 is a first schematic diagram of a preferred embodiment of the refrigeration assembly of the present invention;

[0057] Figure 6 It is a second schematic diagram of a preferred embodiment of the refrigeration assembly of the present invention.

[0058] In the figure: 101, water collecting pan; 102, electric heating device; 103, compressor; 104, evaporator; 105, four-way valve; 106, condenser; 107, electronic expansion valve; 108, drain outlet; 201, acquisition module; 202, judgment module; 203, control module; 301, memory; 302, processor. DETAILED DESCRIPTION

[0059] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0060] The following is attached to the instruction manual Figures 1 to 6 And embodiments 1 to 3 describe in detail the thermal fluorination defrosting control method, device and refrigeration equipment of the present invention.

[0061] Example 1

[0062] This embodiment describes in detail the thermal fluorination frost control method of the present invention.

[0063] Figure 1 FIG. 2 is a flow chart showing a preferred implementation of the thermal fluorination frost control method of this embodiment. Figure 1 As shown, the thermal fluorination frost control method of this embodiment includes the following steps:

[0064] Step 1: Obtain the parameters required to determine whether the refrigeration equipment meets the defrost entry conditions.

[0065] Step 2: Determine whether the refrigeration equipment meets the defrost entry conditions. When the refrigeration equipment meets the defrost entry conditions, control the four-way valve 105 to switch to the defrost mode, and the compressor 103 is turned off after working for a preset time.

[0066] Step 3: Obtain the cold storage temperature and compare the obtained cold storage temperature with the first preset cold storage temperature. 库温 >T 库温预设1 When T , the electric heating device 102 in the water receiving tray 101 is controlled to be in the off state, the compressor 103 is started, and the refrigeration equipment enters the thermal fluorine defrosting mode; when T 库温 ≤T 库温预设1 When the electric heating device 102 in the water tray 101 is controlled to be turned on and preheat the water tray 101, the compressor 103 is started and the refrigeration equipment enters the thermal fluorination defrosting mode; wherein, T 库温 is the real-time temperature of the cold storage, T 库温预设1 It is the first preset cold storage temperature.

[0067] Preferably, T 库温预设1 is 0℃. When T 库温 >T 库温预设1 When the storage temperature is relatively high, the temperature in the water tray 101 is also high. At this time, the defrosted water dripping from the evaporator 104 to the water tray 101 is not in an ice state without heating. When T 库温 ≤T 库温预设1 When the room temperature is low, the temperature in the water receiving pan 101 is also low, and there is a situation where the defrosted water dripping from the evaporator 104 into the water receiving pan 101 is ice cubes.

[0068] The thermal fluorination frost control method of this embodiment, when T 库温 >T 库温预设1 When the electric heating device 102 in the water receiving pan 101 is controlled to be in the off state, the refrigeration equipment enters the thermal fluorine defrosting mode. At this time, the water receiving pan 101 does not need to be heated, and the defrosting water dripping from the evaporator 104 to the water receiving pan 101 is in a non-ice state, thereby ensuring the smooth drainage of the water receiving pan 101. At the same time, in this case, since the electric heating device 102 does not need to work, compared with the defrosting technology in the prior art, it has the advantages of short defrosting time, energy saving and avoidance of storage temperature fluctuations; on the other hand, when T 库温 ≤T 库温预设1 When the electric heating device 102 in the water receiving tray 101 is controlled to be in the on state, the refrigeration equipment then enters the thermal fluorination defrosting mode, that is, at T 库温 ≤T 库温预设1 When the water pan 101 is heated in advance, the defrosted water of the evaporator 104 that drips into the water pan 101 is in a non-ice state, thereby ensuring the smooth drainage of the water pan 101; at the same time, in this case, since only one electric heating device 102 is required to work, compared with the defrosting technology using two heaters in the prior art, it has the advantages of short defrosting time, energy saving and reduced warehouse temperature fluctuation, and compared with the defrosting technology using one electric heating device 102 in the prior art, it has the advantage of smooth drainage. That is, the thermal fluorine defrosting control method of this embodiment solves the technical problem that the drainage pipe is blocked by ice and cannot be drained when the evaporator 104 is defrosted in the tube by using refrigerant in the prior art.

[0069] On the other hand, in step 2, the compressor 103 is turned off after working for a preset time (for example, 5s), which can ensure that the refrigerant has a sufficient pressure difference after the docking water pan 101 is preheated, and the refrigeration equipment can establish the hot fluorine defrost mode in time after the docking water pan 101 is preheated; at the same time, it can also avoid preheating the docking water pan 101 first, and then controlling the four-way valve 105 to switch to the defrost mode. At this time, the refrigerant pressure difference is insufficient and the four-way valve 105 cannot be switched, or the refrigeration equipment is first operated for cooling so that the refrigerant has a sufficient pressure difference, and then the defrost mode is operated. Since the refrigeration process of the refrigeration equipment will reduce the temperature of the water receiving pan 101, thereby consuming the heat generated by the electric heating device 102, the water receiving pan 101 cannot meet the predetermined temperature, thereby failing to ensure the reliability of drainage.

[0070] According to a preferred embodiment, controlling the electric heating device 102 in the water receiving tray 101 to be in an on state further includes the following steps:

[0071] Obtaining the duration that the electric heating device 102 is in the on state;

[0072] The acquired duration of the electric heating device 102 being in the on state is compared with the defrosting preheating duration, and based on the comparison result, the refrigeration device is controlled to enter the thermal fluorine defrosting mode.

[0073] Preferably, when t 开启 ≥t 化霜预热 When t 开启 <t 化霜预热 When the electric heating device 102 is controlled to run for a time not less than t 化霜预热 ; where t 开启 is the time duration that the electric heating device 102 is in the on state, t 化霜预热 The required preheating time of the water tray 101, such as Figure 2 More preferably, t 化霜预热 In order to make the defrosted water dripping from the evaporator 104 into the water receiving tray 101 not in an ice state, the preheating time required by the electric heating device 102 is as follows. 化霜预热 For 3 minutes.

[0074] The thermal fluorine defrost control method of the preferred technical solution of this embodiment can ensure that the docking water tray has sufficient heating time by comparing the time that the electric heating device 102 is in the on state with the defrost preheating time, so that the defrost water that is defrosted by the evaporator 104 and drips into the water receiving tray 101 is in a non-ice state, thereby further ensuring the smooth drainage of the water receiving tray 101.

[0075] According to a preferred embodiment, t 化霜预热 Calculate according to the following formula: 化霜预热 =D1-K1*T 库温, where D1 is the preset preheating time of the water tray 101, and K1 is the preheating ratio coefficient of the water tray 101. Specifically, the preheating ratio coefficient of the water tray 101 can be obtained by the following method: First, obtain t 化霜预热 , thus obtaining multiple groups of test data; secondly, T 库温 is the horizontal axis, with t 化霜预热 A standard curve is drawn as the ordinate, thereby obtaining the preheating proportional coefficient of the water tray 101. In the actual operation of the refrigeration equipment, t 化霜预热 Can be obtained from pre-stored formulas or stored standard curves.

[0076] The thermal fluorination frost control method of the preferred technical solution of this embodiment, t 化霜预热 Calculate according to the following formula: 化霜预热 =D1-K1*T 库温 That is, by intelligently calculating the required preheating time of the water receiving pan 101, the working time of the electric heating device 102 can be shortened as much as possible while ensuring the drainage reliability of the water receiving pan 101, so as to reduce the energy consumption of the refrigeration equipment and reduce the fluctuation of the warehouse temperature.

[0077] According to a preferred embodiment, when t 化霜预热 >t max When t 化霜预热 The value of t max When t 化霜预热 <t min When t 化霜预热 The value of t min When t min ≤t 化霜预热 ≤t max When t 化霜预热 =D1-K1*T 库温 ; where t min The minimum preheating time required for defrosting the water tray 101, t max The maximum preheating time required for defrosting the water tray 101. Not limited to this, if the sensor for detecting the temperature of the storage room fails, t 化霜预热 The value of t max Preferably, t max and t min Based on the actual operating temperature range of the cold storage, the size of the water tray 101, the power of the electric heating device 102 and other parameters, it can be obtained by actual testing according to different models. For example, when the temperature of the cold storage is 0°C, the preheating time required to make the defrosted water dripping from the evaporator 104 to the water tray 101 non-ice state is t min According to the minimum operating condition of the refrigeration equipment, the preheating time required to make the defrost water in the evaporator 104 and drip into the water receiving tray 101 non-ice state is t max .

[0078] The thermal fluorination frost control method of the preferred technical solution of this embodiment is to calculate the t 化霜预热 With t max and t min In comparison, the working time of the electric heating device 102 can be further shortened while further ensuring the drainage reliability of the water receiving pan 101, so as to further reduce the energy consumption of the refrigeration equipment and reduce the fluctuation of the warehouse temperature.

[0079] According to a preferred embodiment, whether the refrigeration equipment meets the defrost entry conditions is determined by the following steps: obtaining the cold storage temperature, the operating time of the compressor 103 and the temperature of the evaporator 104; based on the obtained cold storage temperature, the operating time of the compressor 103 and the temperature of the evaporator 104, determining whether the refrigeration equipment meets the defrost entry conditions.

[0080] Preferably, the defrosting entry condition of the refrigeration equipment is: T 库温 <T 库温预设2 , and t 运行 ≥t 预设 , and T 蒸发 ≤(T 库温 -T 预设温差1 ), where T 库温 is the real-time temperature of the cold storage, T 库温预设2 is the second preset cold storage temperature, t 运行 is the actual time duration of the four-way valve 105 in the defrosting state, t 预设 is the preset time length of the four-way valve 105 in the defrosting state, T 蒸发 is the real-time temperature of the evaporator 104, T 预设温差1 is the first preset temperature difference. More preferably, T 库温预设2 10~15℃; t 预设 3min; T 蒸发 is the tube temperature of the evaporator 104; T 预设温差1 The difference between the temperature of the storage room and the temperature of the evaporator 104 tube when the evaporator is frosted is specifically 10 to 16°C. 库温 >T 库温预设2 When t , the evaporator 104 will not be frosted, so there is no need to defrost; when t 运行 <t 预设 When T, the working time of the four-way valve 105 is too short, the refrigerant pressure difference is low, and it is difficult to achieve reversal, so it is impossible to defrost by hot fluorine; when T 蒸发 >T 库温 -T 预设温差1 When the difference between the storage temperature and the evaporator 104 tube temperature is less than T 预设温差1 , the amount of frost on the surface of the evaporator 104 has not reached the level that requires defrosting, so there is no need for defrosting.

[0081] The thermal fluorination frost control method of the preferred technical solution of this embodiment is to 库温 <T 库温预设2 , and t 运行 ≥t 预设 , and T 蒸发 ≤T 库温 -T 预设温差1 The three conditions determine the defrost entry conditions of the refrigeration equipment, which can ensure that there is a sufficient amount of frost on the evaporator 104, and also ensure the reliability of defrost to avoid frequent initiation of the defrost program.

[0082] According to a preferred embodiment, after the refrigeration device enters the thermal fluorine defrosting mode, it also includes the following steps: obtaining the temperature of the evaporator 104, the length of time that the four-way valve 105 is in the defrosting mode, or the temperature of the condenser 106; based on the obtained temperature of the evaporator 104, the length of time that the four-way valve 105 is in the defrosting state, or the temperature of the condenser 106, judging whether the refrigeration device meets the defrosting exit condition, and when the refrigeration device meets the defrosting exit condition, controlling the four-way valve 105 to switch to the refrigeration mode, such as Figure 2 shown.

[0083] Preferably, the first defrost exit condition of the refrigeration equipment is: the temperature of the evaporator 104 is detected to meet T 蒸发 ≥T 预设化霜终止1 The second defrost exit condition of the refrigeration equipment is: the actual time length of the four-way valve 105 in the defrost state is detected to meet t 运行 ≥t 预设化霜终止 The third defrost exit condition of the refrigeration equipment is: after the four-way valve 105 is opened for the second preset time, the temperature of the condenser 106 is detected for the third consecutive preset time to meet: T 冷凝 ≥T 预设化霜终止2 ; Among them, T 蒸发 is the real-time temperature of the evaporator 104, T 预设化霜终止1 is the first preset defrost termination temperature, t 运行 is the actual time duration of the four-way valve 105 in the defrosting state, t 预设化霜终止 is the preset defrost termination time, T 冷凝 is the real-time temperature of the condenser 106, T 预设化霜终止2 is the second preset defrost termination temperature. Specifically, T 预设化霜终止1 In order to achieve the preset temperature of complete defrosting of the evaporator 104, it can be measured experimentally that T 预设化霜终止1 For example, 15-22℃; t 预设化霜终止 The preset time length for the evaporator 104 to achieve complete defrosting can be measured experimentally, t 预设化霜终止 15min; T 预设化霜终止2The critical temperature of the condenser 106 at which the protection state is in effect is 65°C. 预设化霜终止2 Can be set to 62°C.

[0084] More preferably, the first defrost exit condition of the refrigeration equipment takes precedence over the second defrost exit condition of the refrigeration equipment, and the second defrost exit condition of the refrigeration equipment takes precedence over the third defrost exit condition of the refrigeration equipment.

[0085] The thermal fluorine defrost control method of the preferred technical solution of this embodiment sets multiple defrost exit conditions, and each defrost exit condition is executed in sequence according to priority, which not only ensures the reliability of defrost, but also has the advantages of energy saving and reducing warehouse temperature fluctuations.

[0086] Example 2

[0087] This embodiment describes the thermal fluorination frost control device of the present invention in detail.

[0088] The thermal fluorination frost control device of this embodiment includes an acquisition module 201, a judgment module 202 and a control module 203. Figure 3 Preferably, the acquisition module 201 is used to acquire the parameters required for judging whether the refrigeration equipment meets the defrost entry conditions; the judgment module 202 is used to judge whether the refrigeration equipment meets the defrost entry conditions, and when the refrigeration equipment meets the defrost entry conditions, the four-way valve 105 is controlled to switch to the defrost mode, and the compressor 103 is turned off after working for a preset time; the control module 203 is used to acquire the cold storage temperature, and compare the acquired cold storage temperature with the first preset cold storage temperature, when T 库温 >T 库温预设1 When T , the electric heating device 102 in the water receiving tray 101 is controlled to be in the off state, the compressor 103 is started, and the refrigeration equipment enters the thermal fluorine defrosting mode; when T 库温 ≤T 库温预设1 When the electric heating device 102 in the water tray 101 is controlled to be turned on and preheat the water tray 101, the compressor 103 is started and the refrigeration equipment enters the thermal fluorination defrosting mode; wherein, T 库温 is the real-time temperature of the cold storage, T 库温预设1 More preferably, the parameters acquired by the acquisition module 201, the determination conditions of the determination module 202 and the control method of the control module 203 can all refer to those shown in Example 1.

[0089] The thermal fluorine defrost control device of this embodiment can realize the thermal fluorine defrost control process through the acquisition module 201, the judgment module 202 and the control module 203, thereby ensuring the smooth drainage of the water receiving tray, and at the same time has the advantages of short defrosting time, energy saving and reduced storage temperature fluctuation.

[0090] Example 3

[0091] This embodiment describes the refrigeration equipment of the present invention in detail.

[0092] The refrigeration device of this embodiment includes one or more memories 301 and one or more processors 302. Figure 4 Preferably, one or more memories 301 store executable programs thereon; one or more processors 302 are used to execute the executable programs in the memories 301 to implement the steps of the thermal fluorination frost control method of any technical solution in Example 1.

[0093] The refrigeration device of this embodiment is, for example, a refrigeration system for a cold storage. The air outlet of the compressor 103, the four-way valve 105, the condenser 106, the electronic expansion valve 107, the evaporator 104 and the return air outlet of the compressor 103 are sequentially connected to form a refrigeration assembly for refrigeration and providing cold air in the cold storage. Figure 6 As shown. Figure 5 and Figure 6 As shown, a water receiving tray 101 is provided below the evaporator 104, and an electric heating device 102 and a drain port 108 are provided in the water receiving tray 101. Figure 5 As shown, the evaporator 104 is arranged in the cold storage, and the condenser 106 is arranged outside the cold storage.

[0094] The refrigeration equipment of this embodiment includes one or more memories 301 and one or more processors 302. Through the functions of the memory 301 and the processor 302, the steps of the thermal fluorine defrost control method of any technical solution in Example 1 can be implemented, thereby realizing the thermal fluorine defrost control process, and then ensuring the smooth drainage of the water receiving pan, while also having the advantages of short defrosting time, energy saving and reduced storage temperature fluctuations.

[0095] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0096] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" and "multiple" refers to at least two.

[0097] It should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. In addition, the "connection" used here may include wireless connection; the wording "and / or" used includes any unit and all combinations of one or more associated listed items.

[0098] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0099] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0100] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0101] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0102] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for controlling thermal fluorination frost, It is characterized in that The steps include: Obtain the parameters required to determine whether the refrigeration equipment meets the defrost entry conditions; Determining whether the refrigeration equipment meets the defrost entry condition, and when the refrigeration equipment meets the defrost entry condition, controlling the four-way valve (105) to switch to the defrost mode, and the compressor (103) to shut down after working for a preset time; Get the cold storage temperature, and compare the obtained cold storage temperature with the first preset cold storage temperature. 库温 >T 库温预设1 When T 库温 ≤T 库温预设1 When the electric heating device (102) in the water receiving tray (101) is controlled to be in an on state and preheat the water receiving tray (101), the compressor (103) is started and the refrigeration equipment enters a hot fluorine defrosting mode; Among them, T 库温 is the real-time temperature of the cold storage, T 库温预设1 The first preset cold storage temperature; Controlling the electric heating device (102) in the water receiving tray (101) to be in an on state, further comprising the following steps: obtaining the duration of time that the electric heating device (102) is in the on state; comparing the obtained duration of time that the electric heating device (102) is in the on state with the defrosting preheating duration, and controlling whether the refrigeration equipment enters a thermal fluorine defrosting mode based on the comparison result; When t 开启 ≥t 化霜预热 When t 开启 <t 化霜预热 When the electric heating device (102) is controlled to operate for a time period not less than t 化霜预热 ; where t 开启 is the time duration that the electric heating device (102) is in the on state, t 化霜预热 The preheating time required for the water tray (101); t 化霜预热 Calculate according to the following formula: 化霜预热 =D 1 -K 1 *T 库温 , where D 1 The preheating time of the water tray (101), K 1 is the preheating proportional coefficient of the water receiving tray (101).

2. The thermal fluorination frost control method according to claim 1, It is characterized in that When t 化霜预热 >t max When t 化霜预热 The value of t max ; When t 化霜预热 <t min When t 化霜预热 The value of t min ; When t min ≤t 化霜预热 ≤t max When t 化霜预热 =D 1 -K 1 *T 库温 ; Among them, t min The minimum preheating time required for defrosting the water tray (101), t max The maximum preheating time required for defrosting the water tray (101).

3. The thermal fluorination frost control method according to claim 1, It is characterized in that Determine whether the refrigeration equipment meets the defrost entry conditions by following the steps below: Obtaining the cold storage temperature, the operating time of the compressor (103) and the temperature of the evaporator (104); Based on the acquired cold storage temperature, the operating time of the compressor (103), and the temperature of the evaporator (104), it is determined whether the refrigeration equipment meets the defrosting entry conditions.

4. The thermal fluorination frost control method according to claim 3, It is characterized in that The defrost entry conditions for refrigeration equipment are: T 库温 <T 库温预设2 , and t 运行 ≥t 预设 , and T 蒸发 ≤(T 库温 -T 预设温差1 ), Among them, T 库温预设2 is the second preset cold storage temperature, t 运行 is the actual time that the four-way valve (105) is in the defrosting state, t 预设 T is the preset time length of the four-way valve (105) in the defrosting state, 蒸发 is the real-time temperature of the evaporator (104), T 预设温差1 It is the first preset temperature difference.

5. The method for controlling thermal fluorination frost according to any one of claims 1 to 4, It is characterized in that After the refrigeration equipment enters the thermal fluorination defrosting mode, it also includes the following steps: Obtaining the temperature of the evaporator (104), the duration that the four-way valve (105) is in the defrosting mode, or the temperature of the condenser (106); Based on the acquired temperature of the evaporator (104), the length of time that the four-way valve (105) is in the defrosting state, or the temperature of the condenser (106), it is determined whether the refrigeration device meets the defrosting exit condition. When the refrigeration device meets the defrosting exit condition, the four-way valve (105) is controlled to switch to the refrigeration mode.

6. The thermal fluorination frost control method according to claim 5, It is characterized in that The first defrost exit condition of the refrigeration equipment is: the temperature of the evaporator (104) is detected to meet T for a first preset time period continuously. 蒸发 ≥T 预设化霜终止1 ; The second defrost exit condition of the refrigeration equipment is: the actual time length of the four-way valve (105) being in the defrost state is detected to satisfy t 运行 ≥t 预设化霜终止 ; The third defrost exit condition of the refrigeration equipment is: after the four-way valve (105) is opened for the second preset time, the temperature of the condenser (106) is detected for a third preset time continuously to meet the following conditions: T 冷凝 ≥T 预设化霜终止2 ; Among them, T 蒸发 is the real-time temperature of the evaporator (104), T 预设化霜终止1 is the first preset defrost termination temperature, t 运行 is the actual time that the four-way valve (105) is in the defrosting state, t 预设化霜终止 is the preset defrost termination time, T 冷凝 is the real-time temperature of the condenser (106), T 预设化霜终止2 It is the second preset defrost termination temperature.

7. The thermal fluorination frost control method according to claim 6, It is characterized in that The defrost exit condition of the refrigeration equipment is determined in the following order: the first defrost exit condition of the refrigeration equipment takes precedence over the second defrost exit condition of the refrigeration equipment, and the second defrost exit condition of the refrigeration equipment takes precedence over the third defrost exit condition of the refrigeration equipment.

8. A thermal fluorination frost control device based on the thermal fluorination frost control method according to any one of claims 1 to 7, It is characterized in that include Acquisition module (201): used to acquire parameters required to determine whether the refrigeration equipment meets the defrosting entry conditions; A judgment module (202): used to judge whether the refrigeration equipment meets the defrost entry condition, and when the refrigeration equipment meets the defrost entry condition, control the four-way valve (105) to switch to the defrost mode, and the compressor (103) is turned off after working for a preset time; Control module (203): used to obtain the cold storage temperature and compare the obtained cold storage temperature with the first preset cold storage temperature. 库温 >T 库温预设1 When T 库温 ≤T 库温预设1 When the electric heating device (102) in the water receiving pan (101) is controlled to be in an on state and preheat the water receiving pan (101), the compressor (103) is started and the refrigeration equipment enters a thermal fluorination defrosting mode; wherein, T 库温 is the real-time temperature of the cold storage, T 库温预设1 It is the first preset cold storage temperature.

9. A refrigeration device, It is characterized in that include: One or more memories (301) storing executable programs; One or more processors (302) are used to execute the executable program in the memory (301) to implement the steps of the thermal fluorination frost control method according to any one of claims 1 to 7.

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