Drying and refrigerating integrated system and equipment

Abstract

The utility model provides a drying and refrigerating integrated system and equipment, and relates to the technical field of baking equipment. The drying and refrigerating integrated system is installed in a curing barn and comprises a compressor, a four-way valve, an inner condenser, an outer heat exchanger, an inner evaporator, an electronic expansion valve and a cross-flow plate heat exchanger. The outlet end of the compressor is connected with the four-way valve, the four-way valve is connected with the inner condenser and the outer heat exchanger, the inner condenser and the outer heat exchanger are connected with the electronic expansion valve, the electronic expansion valve is connected with the inner evaporator, the inner evaporator is connected to the inlet end of the compressor, and the cross-flow plate heat exchanger and the inner evaporator are arranged in a matched mode. The inner condenser, the inner evaporator and the cross-flow plate heat exchanger are installed on the indoor side, the indoor side is communicated with air of the curing barn, the outer heat exchanger is installed on the outdoor side, and the outdoor side is not communicated with the air of the curing barn. The drying and refrigerating integrated system can achieve the technical effects of drying and refrigerating functions, high functionality and good overall sealing performance.

Description

Technical Field

[0001] The present application relates to the technical field of baking equipment, and more specifically, to an integrated drying and refrigeration system and equipment. Background Art

[0002] In the tobacco curing field, tobacco curing is concentrated from May to July every year. The rest of the time, the curing rooms and heat pump equipment are idle. The equipment and electricity investment of the entire tobacco curing room group is large, and the heat pump equipment cannot be fully utilized with only 3 months of use a year.

[0003] In the prior art, most drying equipment only has a drying function, and because an open system is used, fresh air is introduced to discharge the high-temperature and high-humidity air in the drying room to the outside to achieve a dehumidification effect, which easily leads to a large amount of heat loss. The entire drying room is not sealed enough and has low functionality. Utility Model Content

[0004] The purpose of the present application is to provide a drying and refrigeration integrated system, equipment and control method, which can achieve the technical effects of drying and refrigeration functions, high functionality and good overall sealing.

[0005] In a first aspect, the present application provides a drying and refrigerating integrated system, which is installed in a drying room and includes a compressor, a four-way valve, an internal condenser, an external heat exchanger, an internal evaporator, an electronic expansion valve and a cross-flow plate heat exchanger;

[0006] The outlet end of the compressor is connected to the four-way valve, the four-way valve is respectively connected to the inner condenser and the outer heat exchanger, the inner condenser and the outer heat exchanger are respectively connected to the electronic expansion valve, the electronic expansion valve is connected to the inner evaporator, the inner evaporator is connected to the inlet end of the compressor, and the cross-flow plate heat exchanger is matched with the inner evaporator;

[0007] The inner condenser, the inner evaporator and the cross-flow plate heat exchanger are installed on the indoor side, the indoor side is connected with the air of the baking room, and the outer heat exchanger is installed on the outdoor side, the outdoor side is not connected with the air of the baking room.

[0008] In the above implementation process, the integrated drying and refrigeration system divides the baking room into an indoor side and an outdoor side, wherein the outdoor side is not connected to the baking room air, while the indoor side is connected to the baking room air, and the internal condenser, internal evaporator, and cross-flow plate heat exchanger are installed on the indoor side, and the external heat exchanger is installed on the outdoor side. Fresh air valve and exhaust valve are no longer provided, while ensuring the sealing of the baking room, the baking function of the baking room is not affected; at the same time, the refrigerant flow direction adjustment function of the four-way valve is used to realize the switching of the refrigerant, so as to realize the drying and refrigeration functions of the baking room; thus, the integrated drying and refrigeration system can achieve the technical effects of drying and refrigeration functions, high functionality and good overall sealing.

[0009] Furthermore, the integrated drying and refrigeration system further includes a first one-way valve, one end of which is connected to the internal condenser, and the other end of which is connected to the electronic expansion valve.

[0010] In the above implementation process, the first one-way valve is provided to ensure that the refrigerant flows from the internal condenser to the electronic expansion valve.

[0011] Furthermore, the integrated drying and refrigeration system further includes a second one-way valve, one end of the second one-way valve is connected to the external heat exchanger, and the other end of the second one-way valve is connected to the electronic expansion valve.

[0012] In the above implementation process, the second one-way valve is provided to ensure that the refrigerant flows from the external heat exchanger to the electronic expansion valve.

[0013] Furthermore, the integrated drying and refrigeration system also includes a first solenoid valve, one end of which is connected between the electronic expansion valve and the internal evaporator, and the other end of which is connected between the external heat exchanger and the second one-way valve.

[0014] In the above implementation process, the flow direction switching of the external heat exchanger is assisted by the first solenoid valve control.

[0015] Furthermore, the integrated drying and refrigerating system further comprises a second solenoid valve, one end of the second solenoid valve is connected to the electronic expansion valve, and the other end of the second solenoid valve is connected to the internal evaporator.

[0016] In the above implementation process, the second solenoid valve is provided to control whether the refrigerant flows through the internal evaporator, thereby controlling the operation mode of the drying and refrigerating integrated device.

[0017] Furthermore, the integrated drying and refrigeration system also includes a first fan, a second fan and a third fan, the first fan is matched with the external heat exchanger, the second fan is matched with the internal condenser, and the third fan is matched with the cross-flow plate heat exchanger.

[0018] In the above implementation process, by setting the first fan, the second fan and the third fan, the air circulation efficiency of the external heat exchanger, the internal condenser and the cross-flow plate heat exchanger is accelerated, thereby improving the operating efficiency of the drying and refrigeration integrated system.

[0019] Furthermore, the integrated drying and refrigeration system also includes a gas separator, one end of which is connected to the internal evaporator, and the other end of which is connected to the inlet end of the compressor.

[0020] Furthermore, the integrated drying and refrigeration system also includes an oil separator, a first end of the oil separator is connected to the outlet end of the compressor, a second end of the oil separator is connected to the four-way valve, and a third end of the oil separator is connected to the inlet end of the compressor.

[0021] Furthermore, the four-way valve is connected to the gas separator and the internal evaporator.

[0022] In a second aspect, the present application provides integrated drying and refrigeration equipment, comprising a plurality of integrated drying and refrigeration systems as described in any one of the first aspects.

[0023] Furthermore, the present application provides a control method for a drying and refrigerating integrated device, which is applied to the drying and refrigerating integrated device described in the second aspect, and the control method includes:

[0024] Get the real-time temperature information and target temperature information of the baking room;

[0025] Generate temperature difference information according to the baking room real-time temperature information and the baking room target temperature information;

[0026] Determine the operation status information according to the preset temperature interval and the temperature difference information, wherein the preset temperature interval includes, from low to high, a fast adding area, a loading area, a holding area, an unloading area, a fast unloading area, and an emergency stop area;

[0027] The operation of the drying and refrigerating integrated device is controlled according to the operating status information.

[0028] In the above implementation process, the temperature difference information is obtained by comparing the real-time temperature information of the baking room with the target temperature information of the baking room, and then the partition control is realized according to the preset temperature range and the temperature difference information. The operation of the drying and refrigeration equipment is controlled according to the operating status information, so that the temperature change of the baking room is smooth, thereby avoiding drastic changes in the temperature of the baking room.

[0029] Furthermore, the step of controlling the operation of the drying and refrigerating integrated device according to the operation status information includes:

[0030] Obtaining temperature trend information according to the real-time temperature information of the baking room;

[0031] determining operation adjustment information according to the temperature trend information;

[0032] The operation of the drying and refrigerating integrated device is controlled according to the operation status information and the operation adjustment information.

[0033] In the above implementation process, after reaching the temperature, the unit is further controlled and adjusted according to the temperature change trend to make the temperature change more gradual.

[0034] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the first mode operation of the drying and refrigeration integrated system provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the second mode operation of the integrated drying and refrigeration system provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of the third mode of operation of the integrated drying and refrigerating system provided in an embodiment of the present application;

[0040] Figure 4 A first schematic diagram of air circulation in a baking room provided in an embodiment of the present application;

[0041] Figure 5 A second schematic diagram of air circulation in a baking room provided in an embodiment of the present application;

[0042] Figure 6 A third schematic diagram of air circulation in a baking room provided in an embodiment of the present application;

[0043] Figure 7 A flow chart of a control method for a drying and refrigerating integrated device provided in an embodiment of the present application.

[0044] Figure numerals: compressor 1; four-way valve 2; first fan 3; second fan 4; internal condenser 5; first non-return valve 6; second non-return valve 7; external heat exchanger 8; first solenoid valve 9; second solenoid valve 10; internal evaporator 11; gas separator 12; electronic expansion valve 13; cross-flow plate heat exchanger 14; third fan 15; oil separator 16. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0046] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0047] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0048] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0050] The embodiments of the present application provide a drying and refrigeration integrated system, equipment and control method, which can be applied to the drying process of a baking room, such as a tobacco baking room. The drying and refrigeration integrated system divides the baking room into an indoor side and an outdoor side, wherein the outdoor side is not connected to the baking room air, while the indoor side is connected to the baking room air, and an internal condenser, an internal evaporator and a cross-flow plate heat exchanger are installed on the indoor side, and an external heat exchanger is installed on the outdoor side. A fresh air valve and an exhaust air valve are no longer provided, so that the sealing of the baking room is ensured without affecting the baking function of the baking room. At the same time, the refrigerant flow direction adjustment function of the four-way valve is used to realize the switching of the refrigerant, so that the drying and refrigeration functions of the baking room can be realized. Therefore, the drying and refrigeration functions of the baking room can be realized. Thus, the drying and refrigeration functions can be realized by the drying and refrigeration integrated system, and the technical effects of high functionality and good overall sealing can be achieved.

[0051] See also Figures 1 to 5 , Figure 1 This is a schematic diagram of the first mode operation of the drying and refrigeration integrated system provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the second mode operation of the drying and refrigeration integrated system provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the third mode operation of the drying and refrigerating integrated system provided in an embodiment of the present application. Figure 4 This is a first schematic diagram of air circulation in a baking room provided in an embodiment of the present application. Figure 5 This is a second schematic diagram of air circulation in a baking room provided in an embodiment of the present application. Figure 6 A third schematic diagram of air circulation in a baking room provided in an embodiment of the present application; the drying and refrigeration integrated system is installed in the baking room, including a compressor 1, a four-way valve 2, an internal condenser 5, an external heat exchanger 8, an internal evaporator 11, an electronic expansion valve 13 and a cross-flow plate heat exchanger 14;

[0052] The outlet end of the compressor 1 is connected to the four-way valve 2, the four-way valve 2 is connected to the inner condenser 5 and the outer heat exchanger 8 respectively, the inner condenser 5 and the outer heat exchanger 8 are connected to the electronic expansion valve 13 respectively, the electronic expansion valve 13 is connected to the inner evaporator 11, the inner evaporator 11 is connected to the inlet end of the compressor 1, and the cross-flow plate heat exchanger 14 is matched with the inner evaporator 11;

[0053] For example, by adjusting the four-way valve 2, the refrigerant flow direction can be adjusted, thereby completing the refrigerant flow direction switching, and realizing the drying and refrigeration functions of the drying room;

[0054] Exemplarily, the inner condenser 5, the inner evaporator 11, and the cross-flow plate heat exchanger 14 are installed on the indoor side, which is connected to the air of the baking room, and the outer heat exchanger 8 is installed on the outdoor side, which is not connected to the air of the baking room.

[0055] Exemplarily, the air circulation is divided into an indoor side and an outdoor side. The indoor side is connected to the baking room air, and the outdoor side is connected to the external environment air. The air on both sides of the outdoor side and the indoor side does not contact each other, which effectively ensures the sealing of the baking room.

[0056] In some embodiments, the integrated drying and refrigeration system divides the baking room into an indoor side and an outdoor side, wherein the outdoor side is not connected to the baking room air, while the indoor side is connected to the baking room air, and the internal condenser 5, the internal evaporator 11, and the cross-flow plate heat exchanger 14 are installed on the indoor side, and the external heat exchanger 8 is installed on the outdoor side, and the fresh air valve and the exhaust air valve are no longer provided, so that the baking function of the baking room is not affected while ensuring the sealing of the baking room; at the same time, the refrigerant flow direction adjustment function of the four-way valve 2 is used to realize the switching of the refrigerant, so that the drying and refrigeration functions of the baking room can be realized; thus, the integrated drying and refrigeration system can achieve the technical effects of drying and refrigeration functions, high functionality and good overall sealing.

[0057] Exemplarily, the integrated drying and refrigerating system further includes a first one-way valve 6 , one end of which is connected to the internal condenser 5 , and the other end of which is connected to the electronic expansion valve 13 .

[0058] Exemplarily, by providing the first one-way valve 6 , it is ensured that the refrigerant flows from the internal condenser 5 to the electronic expansion valve 13 .

[0059] Exemplarily, the integrated drying and refrigerating system further includes a second one-way valve 7 , one end of the second one-way valve 7 is connected to the external heat exchanger 8 , and the other end of the second one-way valve 7 is connected to the electronic expansion valve 13 .

[0060] Exemplarily, by providing the second one-way valve 7 , it is ensured that the refrigerant flows from the external heat exchanger 8 to the electronic expansion valve 13 .

[0061] Exemplarily, the integrated drying and refrigeration system also includes a first solenoid valve 9 , one end of which is connected between the electronic expansion valve 13 and the internal evaporator, and the other end of the first solenoid valve 9 is connected between the external heat exchanger 8 and the second one-way valve 7 .

[0062] Exemplarily, the flow direction switching of the auxiliary control external heat exchanger 8 is controlled by the first solenoid valve 9 .

[0063] Exemplarily, the drying and refrigerating integrated system further includes a second solenoid valve 10 , one end of the second solenoid valve 10 is connected to the electronic expansion valve 13 , and the other end of the second solenoid valve 10 is connected to the internal evaporator 11 .

[0064] Exemplarily, the second solenoid valve 10 is provided to control whether the refrigerant flows through the inner evaporator 11, thereby controlling the operation mode of the drying and refrigerating integrated device.

[0065] Exemplarily, the integrated drying and refrigeration system also includes a first fan 3, a second fan 4 and a third fan 15, the first fan 3 is matched with the external heat exchanger 8, the second fan 4 is matched with the internal condenser 5, and the third fan 15 is matched with the cross-flow plate heat exchanger 14.

[0066] Exemplarily, by providing the first fan 3, the second fan 4 and the third fan 15, the air circulation efficiency of the external heat exchanger 8, the internal condenser 5 and the cross-flow plate heat exchanger 14 is accelerated, thereby improving the operating efficiency of the drying and refrigeration integrated system.

[0067] Exemplarily, the integrated drying and refrigeration system further includes an air separator 12 , one end of the air separator 12 is connected to the internal evaporator 11 , and the other end of the air separator 12 is connected to the inlet end of the compressor 1 .

[0068] Exemplarily, the integrated drying and refrigeration system further includes an oil separator 16 , a first end of the oil separator 16 is connected to the outlet end of the compressor 1 , a second end of the oil separator 16 is connected to the four-way valve 2 , and a third end of the oil separator 16 is connected to the inlet end of the compressor 1 .

[0069] Exemplarily, the four-way valve 2 is connected to the gas separator 12 and the internal evaporator 11 .

[0070] Exemplarily, the second fan 4, the internal condenser 5, the internal evaporator 11, the cross-flow plate heat exchanger 14, and the third fan 15 are arranged on the indoor side and communicated with the air in the baking room;

[0071] In some implementation scenarios, the drying and refrigerating integrated system provided in the embodiment of the present application has three functions, namely three operating modes, namely heating mode, heating and dehumidification mode, and cooling and dehumidification mode, by changing the flow direction of the refrigerant; optionally, the drying and refrigerating integrated system compares the set temperature of the unit with the actual temperature of the drying room during drying, and selects one of the heating mode and the heating and dehumidification mode, and adopts the cooling and dehumidification mode during refrigeration; the operating mode examples of the drying and refrigerating integrated system are described as follows:

[0072] 1. Heating and dehumidification mode: Please refer to Figure 1 and Figure 4 As shown, Figure 1 The figure shows the refrigerant flow diagram in the heating and dehumidification mode. Figure 4 This is a schematic diagram of the air flow direction in the heating and dehumidification mode;

[0073] Refrigerant side:

[0074] After the action of the compressor 1, the refrigerant becomes a high-temperature and high-pressure refrigerant gas, enters the oil separator 16, passes through the four-way valve 3, enters the condenser 5, heats the return air of the baking room, and condenses the refrigerant into a liquid state. After passing through the first one-way valve 6, it is throttled by the electronic expansion valve 13, passes through the second solenoid valve 10, and then enters the internal evaporator 11 to absorb the heat of the baking room. The water vapor in the baking room is condensed into water droplets. The refrigerant passes through the gas separator 12 and finally enters the compressor 1, completing the refrigerant cycle;

[0075] Air side:

[0076] The return air from the baking room is divided into two parts under the action of the fan. One part of the air is cooled down to a state close to the dew point by the cross-flow plate heat exchanger 14, then cooled and dehumidified by the internal evaporator 11, then returns to the cross-flow plate heat exchanger 14, and finally heated by the condenser 5 and sent to the baking room; the other part is directly heated by the condenser 5 and sent to the baking room;

[0077] 2. Heating mode: Please refer to Figure 2 and Figure 5 As shown, Figure 2 The figure shows the refrigerant flow diagram in heating mode. Figure 5 This is a schematic diagram of the flow direction on the air side in the heating mode;

[0078] Refrigerant side:

[0079] After the action of the compressor 1, the refrigerant becomes a high-temperature and high-pressure refrigerant gas, enters the oil separator 16, passes through the four-way valve 3, enters the condenser 5, heats the return air of the baking room, and condenses the refrigerant into a liquid state, passes through the first one-way valve 6, passes through the electronic expansion valve 13 for throttling, passes through the first solenoid valve 9, and then enters the external heat exchanger 8 to absorb the heat of the external environment. The refrigerant passes through the four-way valve 3 and the gas separator 12 and finally enters the compressor 1, completing the refrigerant cycle;

[0080] Air side:

[0081] The return air from the baking room is heated by the condenser 5 and sent to the baking room, and the outdoor air is cooled by the external heat exchanger 8 and discharged into the atmosphere;

[0082] 3. Cooling and dehumidification mode: please refer to Figure 3 and Figure 6 As shown, Figure 3 The figure shows the refrigerant flow diagram in the cooling and dehumidification mode. Figure 6 This is a schematic diagram of the air flow direction in the cooling and dehumidification mode;

[0083] Refrigerant side:

[0084] After the action of the compressor 1, the refrigerant becomes a high-temperature and high-pressure refrigerant gas, enters the oil separator 16, passes through the four-way valve 3, enters the external heat exchanger 8 to release heat to the outdoor air, and the refrigerant condenses into a liquid state, passes through the second one-way valve 7, passes through the electronic expansion valve 13 for throttling, passes through the second solenoid valve 10, and then enters the internal evaporator 11 to absorb the heat of the baking room. The water vapor in the baking room condenses into water droplets, and the refrigerant passes through the gas separator 12 and finally enters the compressor 1 to complete the refrigerant cycle;

[0085] Air side:

[0086] The return air from the baking room is divided into two parts under the action of the fan. One part of the air is cooled down to a state close to the dew point by the cross-flow plate heat exchanger 14, then cooled and dehumidified by the internal evaporator 11, then returns to the cross-flow plate heat exchanger 14, and finally heated by the condenser 5 and sent to the baking room; the other part is directly heated by the condenser 5 and sent to the baking room;

[0087] The outdoor air is heated by the external heat exchanger 8 and discharged into the atmosphere.

[0088] For example, the present application provides a drying and refrigeration integrated device, including multiple Figures 1 to 6 The drying and refrigeration system shown.

[0089] See also Figure 7 , Figure 7 The present invention provides a flow chart of a control method for a drying and refrigerating integrated device according to an embodiment of the present invention. The control method is applied to the drying and refrigerating integrated device. The control method includes the following steps:

[0090] S100: Acquire the real-time temperature information and target temperature information of the baking room;

[0091] S200: Generate temperature difference information according to the real-time temperature information of the baking room and the target temperature information of the baking room;

[0092] S300: determining the operation status information according to the preset temperature interval and the temperature difference information, wherein the preset temperature interval includes, from low to high, a fast adding area, a loading area, a holding area, an unloading area, a fast unloading area and an emergency stop area;

[0093] S400: Controlling the operation of the drying and refrigerating integrated device according to the operation status information.

[0094] Exemplarily, by comparing the real-time temperature information of the baking room with the target temperature information of the baking room, the temperature difference information is obtained, and then the zoning control is implemented according to the preset temperature range and the temperature difference information. The operation of the drying and refrigeration equipment is controlled according to the operating status information, so that the temperature of the baking room changes smoothly, thereby avoiding drastic changes in the temperature of the baking room.

[0095] Exemplarily, S400: the step of controlling the operation of the drying and refrigerating integrated device according to the operation status information includes:

[0096] Get temperature trend information based on real-time temperature information of the baking room;

[0097] Determine operation adjustment information based on temperature trend information;

[0098] The operation of the drying and refrigerating integrated equipment is controlled according to the operation status information and the operation adjustment information.

[0099] For example, after reaching the temperature, the unit is further controlled and adjusted according to the temperature change trend to make the temperature change more gradual.

[0100] In some implementation scenarios, combined with Figures 1 to 7 As shown, the control method of the drying and refrigerating integrated device provided in the embodiment of the present application, the specific control method is exemplified as follows:

[0101] (1) Energy regulation during startup:

[0102] When starting up, the temperature difference between the real-time temperature information of the baking room and the target temperature information of the baking room is used to calculate the number of compressors that need to be loaded to adjust the energy; wherein, the drying and refrigeration integrated equipment includes multiple drying and refrigeration integrated systems, and each drying and refrigeration integrated system corresponds to a compressor;

[0103] When there is a demand for energy loading, a compressor is turned on at a preset interval (e.g. 4 seconds) to prevent excessive current from being started at the same time; when the number of compressors turned on reaches the required number of compressors, energy regulation is switched to normal operation, where the compressor selection rule can be:

[0104] ①: Give priority to starting the variable frequency compressor that has no faults, has not been started and has the shortest running time;

[0105] ②: If no valid compressor is selected in ①, the fixed-frequency compressor that has not been started and has the shortest running time will be selected and started;

[0106] The number of compressors that need to be turned on is calculated as follows:

[0107] S = total number of compressors × (baking room real-time temperature - baking room target temperature) ÷ first full-open temperature difference;

[0108] Among them, S represents the number of compressors that need to be turned on, the real-time temperature of the oven represents the current dry-bulb temperature of the oven, the target temperature of the oven represents the target dry-bulb temperature of the oven, and the first full-open temperature difference represents the temperature difference between the inside and outside of the oven when the drying and refrigeration integrated equipment is fully opened for the first time; among them, when S contains a decimal, S can be rounded down or rounded up;

[0109] (2) Energy regulation

[0110] Monitor the dry bulb temperature of the baking room in real time, and divide the temperature areas into quick adding area, loading area, holding area, unloading area, quick unloading area, and emergency stop area according to the target dry bulb temperature and deviation;

[0111] During the energy calculation cycle, the current dry bulb temperature is compared with the current target dry bulb temperature to determine the loading and unloading of the refrigeration system. The divisions of the quick adding area, loading area, holding area, unloading area, quick unloading area, and emergency stop area are as follows:

[0112] Fast adding area ≤﹣T add ≤Loading area≤﹣T diff ≤Holding area≤T diff ≤Unloading area≤T sub ≤Quick release area≤2T sub ≤ Emergency stop area;

[0113] Among them, T add Indicates the drying room loading deviation; T sub Indicates the drying room unloading deviation; T diff Indicates the drying temperature deviation of (formulation);

[0114] When the dry bulb temperature of the oven reaches the target dry bulb temperature, the effective energy adjustment demand of the temperature trend is shown in the following table:

[0115]

[0116]

[0117] Table 1- Correspondence between temperature trend and energy regulation demand

[0118] Among them, delayed loading means loading after 5 loading cycles, delayed unloading means unloading after 5 unloading cycles, and loading cycle and unloading cycle are setting parameters of drying and refrigeration equipment; the requirements are defined as follows:

[0119] Loading: When there is no variable frequency compressor to load, select fixed frequency or variable frequency compressor to start until all compressors are turned on;

[0120] Hold: Keep the current number of running compressors, that is, do not turn on or off the compressors;

[0121] Unloading: When the variable frequency compressors cannot be unloaded, select the fixed frequency or variable frequency compressor to shut down until all compressors are shut down;

[0122] Emergency stop: one compressor every preset time (for example: 4 seconds).

[0123] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0124] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0125] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0126] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A drying and refrigeration integrated system, characterized in that: The drying and refrigeration integrated system is installed in the drying room, and includes a compressor, a four-way valve, an internal condenser, an external heat exchanger, an internal evaporator, an electronic expansion valve and a cross-flow plate heat exchanger; The outlet end of the compressor is connected to the four-way valve, the four-way valve is respectively connected to the inner condenser and the outer heat exchanger, the inner condenser and the outer heat exchanger are respectively connected to the electronic expansion valve, the electronic expansion valve is connected to the inner evaporator, the inner evaporator is connected to the inlet end of the compressor, and the cross-flow plate heat exchanger is matched with the inner evaporator; The inner condenser, the inner evaporator and the cross-flow plate heat exchanger are installed on the indoor side, the indoor side is connected with the air of the baking room, and the outer heat exchanger is installed on the outdoor side, the outdoor side is not connected with the air of the baking room.

2. The drying and refrigeration integrated system according to claim 1, characterized in that: The integrated drying and refrigerating system further includes a first one-way valve, one end of which is connected to the internal condenser, and the other end of which is connected to the electronic expansion valve.

3. The drying and refrigeration integrated system according to claim 1 or 2, characterized in that: The integrated drying and refrigerating system further includes a second one-way valve, one end of which is connected to the external heat exchanger, and the other end of which is connected to the electronic expansion valve.

4. The drying and refrigeration integrated system according to claim 3, characterized in that: The integrated drying and refrigerating system further comprises a first solenoid valve, one end of which is connected between the electronic expansion valve and the inner evaporator, and the other end of which is connected between the outer heat exchanger and the second one-way valve.

5. The drying and refrigeration integrated system according to claim 1, characterized in that: The integrated drying and refrigerating system further includes a second solenoid valve, one end of which is connected to the electronic expansion valve, and the other end of which is connected to the internal evaporator.

6. The drying and refrigeration integrated system according to claim 1, characterized in that: The integrated drying and refrigeration system further includes a first fan, a second fan and a third fan. The first fan is matched with the external heat exchanger, the second fan is matched with the internal condenser, and the third fan is matched with the cross-flow plate heat exchanger.

7. The drying and refrigeration integrated system according to claim 1, characterized in that: The integrated drying and refrigerating system further comprises an air separator, one end of which is connected to the inner evaporator, and the other end of which is connected to the inlet end of the compressor.

8. The drying and refrigerating integrated system according to claim 1 or 7, characterized in that: The integrated drying and refrigerating system further comprises an oil separator, a first end of which is connected to the outlet end of the compressor, a second end of which is connected to the four-way valve, and a third end of which is connected to the inlet end of the compressor.

9. The drying and refrigeration integrated system according to claim 7, characterized in that: The four-way valve is connected to the gas separator and the internal evaporator.

10. A drying and refrigerating integrated device, characterized in that: It comprises a plurality of integrated drying and refrigeration systems as described in any one of claims 1 to 9.

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