CN112197570B - Composite heat pump drying system - Google Patents
Composite heat pump drying system Download PDFInfo
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- CN112197570B CN112197570B CN202011188000.0A CN202011188000A CN112197570B CN 112197570 B CN112197570 B CN 112197570B CN 202011188000 A CN202011188000 A CN 202011188000A CN 112197570 B CN112197570 B CN 112197570B
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- valve
- heat exchanger
- open state
- closed state
- port
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/06—Air heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The embodiment of the invention provides a composite heat pump drying system, and relates to the field of heat pump drying. The composite heat pump drying system has one of five working conditions, including a first heat exchanger, a second heat exchanger, a third heat exchanger, a compressor, a first valve, a second valve, a third valve and a fourth valve; the gas flows from the second heat exchanger to the first heat exchanger; the first valve is arranged between the first heat exchanger and the second heat exchanger; the first port of the third heat exchanger is connected with the second valve, and the second port is respectively connected with the ports of the third valve and the fourth valve; the second valve is arranged between the first valve and the first heat exchanger or the second heat exchanger; the third valve is connected with the exhaust port of the compressor, and the fourth valve is connected with the air suction port of the compressor. The embodiment of the invention can adapt to different drying material requirements and different drying process requirements, thereby achieving the purpose of flexibly and rapidly adjusting the temperature required by the drying room, and ensuring that the whole process is more energy-saving and the adjusting time is shorter.
Description
Technical Field
The invention relates to the field of heat pump drying, in particular to a composite heat pump drying system.
Background
Conventional heat pump drying generally adopts closed heat pump drying and open heat pump drying, and the closed heat pump drying processes the air in a drying room by dehumidifying and then reheating the air. However, for different processes or different dried objects, the temperature of the drying room needs to be changed sometimes, and in the prior art, some heat energy is supplemented by electric heating or released by means of forced air exhaust, shutdown and the like. These approaches have the problem: the whole drying process can have high energy consumption level, or the dried object is influenced by the outside, or the processing time is prolonged, and the like.
Disclosure of Invention
The invention aims to provide a composite heat pump drying system which can stably supplement heat energy or release heat energy to a drying room or supplement heat energy or release heat energy to the drying room under the condition of realizing a large amount of dehumidification drying for different drying objects or drying processes on the premise of realizing a conventional closed drying function; therefore, the aim of flexibly and quickly adjusting the temperature required by the drying room is fulfilled, and the whole process is more energy-saving and the adjusting time is shorter.
The invention provides a composite heat pump drying system which comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a compressor, a first valve, a second valve, a third valve and a fourth valve, wherein the first heat exchanger is connected with the second heat exchanger; the first heat exchanger and the second heat exchanger are positioned in the same air duct, and gas flows along the second heat exchanger flow and the first heat exchanger in sequence; an exhaust port of the compressor is connected with an inlet of the first heat exchanger, an outlet of the first heat exchanger is connected with an inlet of the second heat exchanger, an outlet of the second heat exchanger is connected with an air suction port of the compressor, and a first valve is arranged on a pipeline between the first heat exchanger and the second heat exchanger; the first port of the third heat exchanger is connected with the first port of the second valve, the second port of the second valve is connected with a pipeline between the first valve and the first heat exchanger, or the second port of the second valve is connected with a pipeline between the first valve and the second heat exchanger; the second port of the third heat exchanger is connected with the ports of the third valve and the fourth valve respectively, the other port of the third valve is connected with the exhaust port of the compressor, and the other port of the fourth valve is connected with the air suction port of the compressor; the working conditions of the composite heat pump drying system comprise at least one of a first working condition, a second working condition, a third working condition, a fourth working condition and a fifth working condition; the first working condition includes: the first valve is in an open state, the second valve is in a closed state, and at least one of the third valve and the fourth valve is in a closed state; or the first valve is in an open state, the second valve is in a closed state, the third valve is in a closed state, and the fourth valve is in a closed state; the second working condition includes: if the second port of the second valve is connected with the pipeline between the first valve and the first heat exchanger, the first valve is in a closed state, the second valve is in an open state, the third valve is in a closed state, and the fourth valve is in an open state; if the second valve is connected with the pipeline between the first valve and the second heat exchanger, the first valve is in an open state, the second valve is in an open state, the third valve is in a closed state, and the fourth valve is in an open state; the third operating mode includes: if the second port of the second valve is connected with the pipeline between the first valve and the first heat exchanger, the first valve is in an open state, the second valve is in an open state, the third valve is in an open state, and the fourth valve is in a closed state; if the second valve is connected with the pipeline between the first valve and the second heat exchanger, the first valve is in a closed state, the second valve is in an open state, the third valve is in an open state, and the fourth valve is in a closed state; the fourth working condition includes: the first valve is in an open state, the second valve is in an open state, the third valve is in a closed state, and the fourth valve is in an open state; the fifth operating mode includes: the first valve is in an open state, the second valve is in an open state, the third valve is in an open state, and the fourth valve is in a closed state.
In an alternative embodiment, the heat pump drying system further comprises a fifth valve and a sixth valve; two ends of the fifth valve are respectively connected with the second port of the second valve and the pipeline between the first valve and the first heat exchanger, and two ends of the sixth valve are respectively connected with the second port of the second valve and the pipeline between the first valve and the second heat exchanger; the first working condition includes: the first valve is in an open state, the second valve is in a closed state, at least one of the third valve and the fourth valve is in a closed state, and at least one of the fifth valve and the sixth valve is in a closed state; or the first valve is in an open state, the second valve is in an open or closed state, at least one of the third valve and the fourth valve is in a closed state, the fifth valve is in a closed state, and the sixth valve is in a closed state; or the first valve is in an open state, the second valve is in an open or closed state, the third valve is in a closed state, the fourth valve is in a closed state, and at least one of the fifth valve and the sixth valve is in a closed state; the second working condition includes: the first valve is in a closed state, the second valve is in an open state, the third valve is in a closed state, the fourth valve is in an open state, the fifth valve is in an open state, and the sixth valve is in a closed state; the third operating mode includes: the first valve is in a closed state, the second valve is in an open state, the third valve is in an open state, the fourth valve is in a closed state, the fifth valve is in a closed state, and the sixth valve is in an open state; the fourth working condition includes: the first valve is in an open state, the second valve is in an open state, the third valve is in a closed state, the fourth valve is in an open state, one of the fifth valve and the sixth valve is in a closed state, and the other valve is in an open state; the fifth operating mode includes: the first valve is in an open state, the second valve is in an open state, the third valve is in an open state, the fourth valve is in a closed state, one of the fifth valve and the sixth valve is in a closed state, and the other valve is in an open state.
In an alternative embodiment, the second valve is an electric regulating valve or an electronic expansion valve, the fifth valve is an electric two-way valve, and the sixth valve is an electric two-way valve; or the second valve is an electric two-way valve, the fifth valve is a one-way valve or an electric two-way valve, and the sixth valve is a one-way valve or an electric two-way valve; or the fifth valve and the sixth valve form a three-way valve, and three ports of the three-way valve are respectively connected with two end pipelines of the first valve and a second port of the second valve.
In an alternative embodiment, the second port of the second valve is in line connection with the first valve and the second heat exchanger; the composite heat pump drying system also comprises a seventh valve, wherein a first port of the seventh valve is connected with a pipeline between the first valve and the first heat exchanger, and a second port of the seventh valve is connected with a pipeline between the second valve and the third heat exchanger; the first working condition includes: the first valve is in an open state, the second valve is in a closed state, at least one of the third valve and the fourth valve is in a closed state, and the seventh valve is in a closed state; the third operating mode includes: the first valve is in a closed state, the second valve is in an open state, the third valve is in an open state, the fourth valve is in a closed state, and the seventh valve is in a closed state; the fourth working condition includes: the first valve is in an open state, and the second valve is in an open state; the third valve is in a closed state, the fourth valve is in an open state, and the seventh valve is in an open state; the fifth operating mode includes: the first valve is in an open state, and the second valve is in an open state; the third valve is in an open state, the fourth valve is in a closed state, and the seventh valve is in a closed state.
In an alternative embodiment, the seventh valve is a one-way valve or an electrically operated valve, and when the seventh valve is a one-way valve, the refrigerant is able to flow from the first port of the seventh valve to the second port of the seventh valve.
In an alternative embodiment, the second port of the second valve is in line connection with the first valve and the second heat exchanger; the composite heat pump drying system also comprises an eighth valve, wherein a first port of the eighth valve is connected with the first heat exchanger and a pipeline between the first valve, and a second port of the eighth valve is connected with a pipeline between the second valve and the third heat exchanger; the first working condition includes: the first valve is in an open state, the second valve is in a closed state, the third valve is in a closed state, the fourth valve is in a closed state, and the eighth valve is in a closed state; the fourth working condition includes: the first valve is in an open state, the second valve is in an open state, the third valve is in a closed state, the fourth valve is in an open state, and the eighth valve is in a closed state; the fifth operating mode includes: the first valve is in an open state, the second valve is in a closed state, the third valve is in an open state, the fourth valve is in a closed state, and the eighth valve is in an open state.
In an alternative embodiment, the second valve and the eighth valve are both check valves, and the refrigerant can flow from the second port of the second valve to the first port of the second valve, and the refrigerant can flow from the second port of the eighth valve to the first port of the eighth valve; or the second valve is an electric regulating valve or an electronic expansion valve, the eighth valve is a one-way valve, and the second port of the eighth valve flows to the first port of the eighth valve.
In an alternative embodiment, the third valve and the fourth valve form a three-way valve, and three ports of the three-way valve are respectively connected with the exhaust port, the air suction port and the first port of the third heat exchanger of the compressor.
In an alternative embodiment, the third valve and the fourth valve are two ports in the four-way valve, and the four ports of the four-way valve are respectively connected with the exhaust port, the air suction port, the first port of the third heat exchanger and the second port of the second heat exchanger of the compressor; the two ends of the first valve are respectively connected with the first heat exchanger and the second heat exchanger, the first port of the second valve is connected with the third heat exchanger, and the second port of the second valve is connected with a pipeline between the first valve and the second heat exchanger; the first working condition includes: the four-way valve enables the third heat exchanger to be connected with an exhaust port of the compressor, the first valve is in an open state, and the second valve is in a closed state; the second working condition includes: the four-way valve enables the third heat exchanger to be connected with an air suction port of the compressor, the first valve is in an open state, and the second valve is in an open state; the third operating mode includes: the four-way valve enables the third heat exchanger to be connected with an exhaust port of the compressor, the first valve is in a closed state, and the second valve is in an open state; the fifth operating mode includes: the four-way valve enables the third heat exchanger to be connected with an exhaust port of the compressor, the first valve is in an open state, and the second valve is in an open state.
In an alternative embodiment, the third valve and the fourth valve are two ports in the four-way valve, and the four ports of the four-way valve are respectively connected with the exhaust port, the air suction port, the first port of the third heat exchanger and the second port of the second heat exchanger of the compressor; the composite heat pump drying system also comprises a ninth valve, two ports of the ninth valve are respectively connected with the ports of the first valve and the first heat exchanger, and a second port of the second valve is connected with a pipeline between the ninth valve and the first valve; the first working condition includes: the four-way valve enables the third heat exchanger to be connected with an exhaust port of the compressor, the first valve is in an open state, the second valve is in a closed state, and the ninth valve is in an open state; the second working condition includes: the four-way valve enables the third heat exchanger to be connected with an air suction port of the compressor, the first valve is in an open state, the second valve is in an open state, and the ninth valve is in a closed state; the third operating mode includes: the four-way valve enables the third heat exchanger to be connected with an exhaust port of the compressor, the first valve is in an open state, the second valve is in an open state, and the ninth valve is in a closed state; the fifth operating mode includes: the four-way valve enables the third heat exchanger to be connected with an exhaust port of the compressor, the first valve is in an open state, the second valve is in an open state, and the ninth valve is in an open state.
In an alternative embodiment, the composite heat pump drying system further comprises a water receiving disc and a drainage tube, wherein the water receiving disc is arranged below the second heat exchanger, and the drainage tube is connected with the water receiving disc.
In an alternative embodiment, the composite heat pump drying system further comprises a blower extending to the third heat exchanger for directing condensed water to a surface of the third heat exchanger, the blower being for flowing gas across the surface of the third heat exchanger.
In an alternative embodiment, the composite heat pump drying system further comprises a fourth heat exchanger, the first heat exchanger, the second heat exchanger and the fourth heat exchanger are located in the same air duct, and the gas flows along the fourth heat exchanger, the second heat exchanger and the first heat exchanger in sequence; the fourth heat exchanger is connected with a drainage tube, the drainage tube is used for guiding water in the water receiving disc to a water inlet of the fourth heat exchanger, and a water outlet of the fourth heat exchanger is used for leading out water.
The embodiment of the invention has the beneficial effects that: under the condition that the function of conventional closed drying can be realized, the purposes of further realizing that the heat energy is further supplemented or released to the drying room under the condition of a large amount of dehumidification drying for different drying objects and drying processes, or the heat energy is supplemented or released to the drying room in a large amount, and the temperature required by the drying room is flexibly and quickly adjusted are achieved, so that the whole process is more energy-saving and the adjusting time is shorter. The system can be used for adjusting different drying objects and different drying processes, realizing various working modes, meeting different drying requirements, achieving the purpose of flexibly and rapidly adjusting the temperature required by a drying room, and enabling the whole process to be more energy-saving and shorter in adjusting time. For example, when the closed drying system needs to raise the temperature of the drying room, the conventional method is to start electric heating of a part of the inside of the system, so that the power consumption is high, the reaction is slow, and under the condition of the embodiment, the heat which can be provided can reach 3-4 times under the same power distribution, so that the heating process of the drying room becomes easier, more flexible and faster, and on the other hand, the energy is saved by more than 50% compared with the traditional scheme.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a composite heat pump drying system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another composite heat pump drying system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a composite heat pump drying system according to an embodiment of the present invention when the composite heat pump drying system includes a fifth valve and a sixth valve;
FIG. 4 is a schematic view of another valve of the composite heat pump drying system provided in FIG. 3;
fig. 5 is a schematic structural diagram of a composite heat pump drying system according to an embodiment of the present invention when the seventh valve is included;
FIG. 6 is a schematic view of another valve of the composite heat pump drying system provided in FIG. 5;
fig. 7 is a schematic structural diagram of a composite heat pump drying system according to an embodiment of the present invention when the eighth valve is included;
FIG. 8 is a schematic view of another valve assembly of the composite heat pump drying system provided in FIG. 7;
FIG. 9 is a schematic diagram of a further valve assembly of the composite heat pump drying system provided in FIG. 7;
fig. 10 is a schematic structural diagram of a third valve and a fourth valve combined into a first three-way valve in the composite heat pump drying system provided in fig. 1;
fig. 11 is a schematic structural diagram of a fifth valve and a sixth valve combined into a second three-way valve in the composite heat pump drying system provided in fig. 4 or fig. 5;
fig. 12 is a schematic structural diagram of a combination of a third valve and a fourth valve in the composite heat pump drying system provided in fig. 1 as a four-way valve;
fig. 13 is a schematic structural view of a ninth valve included in the composite heat pump drying system provided in fig. 12;
FIG. 14 is a schematic view of a structure of the composite heat pump drying system provided in FIG. 1, in which condensed water generated by the second heat exchanger is drained to a surface of the third valve;
fig. 15 is a schematic structural view of the composite heat pump drying system provided in fig. 1 including a fourth valve.
Icon: 100-a composite heat pump drying system; 101-a first heat exchanger; 102-a second heat exchanger; 103-a third heat exchanger; 104-a compressor; 105-a first valve; 106-a second valve; 107-a third valve; 108-a fourth valve; 109-fifth valve; 110-sixth valve; 111-seventh valve; 112-eighth valve; 113-ninth valve; 114-a water pan; 115-drainage tube; 116-fans; 117-fourth heat exchanger; 118-a first three-way valve; 119-a second three-way valve; 120-four-way valve; 121-bypass duct.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, an embodiment of the present invention provides a composite heat pump drying system 100. The composite heat pump drying system 100 comprises a first heat exchanger 101, a second heat exchanger 102, a third heat exchanger 103, a compressor 104, a first valve 105, a second valve 106, a third valve 107 and a fourth valve 108.
The first heat exchanger 101 and the second heat exchanger 102 are positioned in the same air duct, and gas flows along the second heat exchanger 102 and the first heat exchanger 101 in sequence; an exhaust port of the compressor 104 is connected with an inlet of the first heat exchanger 101, an outlet of the first heat exchanger 101 is connected with an inlet of the second heat exchanger 102, an outlet of the second heat exchanger 102 is connected with an air suction port of the compressor 104, and a first valve 105 is arranged on a pipeline between the first heat exchanger 101 and the second heat exchanger 102; the first port of the third heat exchanger 103 is connected with the first port of the second valve 106, the second port of the second valve 106 is connected with a pipeline between the first valve 105 and the first heat exchanger 101 (as shown in fig. 1), or the second port of the second valve 106 is connected with a pipeline between the first valve 105 and the second heat exchanger 102 (as shown in fig. 2); the second port of the third heat exchanger 103 is connected to the ports of the third valve 107 and the fourth valve 108, respectively, the other port of the third valve 107 is connected to the discharge port of the compressor 104, and the other port of the fourth valve 108 is connected to the suction port of the compressor 104.
Furthermore, a bypass duct 121 may be provided between the first heat exchanger 101 and the second heat exchanger 102, the bypass duct 121 being adapted to allow a portion of the gas to flow from upstream of the second heat exchanger 102 directly to upstream of the first heat exchanger 101 without passing through the second heat exchanger 102. Alternatively, the ventilation size of the bypass duct 121 may be adjusted by providing a damper.
It should be noted that, in the embodiment of the present invention, the working conditions of the composite heat pump drying system 100 may include at least one of the first working condition, the second working condition, the third working condition, the fourth working condition and the fifth working condition. Wherein, in the first working condition, the composite heat pump drying system 100 does not perform heat transfer with the outside air; under the second operating condition, the hybrid heat pump drying system 100 absorbs heat rapidly (i.e., absorbs a large amount of heat) from the ambient air; under the third operating condition, the hybrid heat pump drying system 100 rapidly releases heat (i.e., a large amount of heat release) to the outside air; in the fourth operating condition, the hybrid heat pump drying system 100 absorbs heat slowly (i.e., partially) from the ambient air; in a fifth operating mode, the hybrid heat pump drying system 100 releases heat slowly (i.e., partially) to the outside air. The working states of the valves under the working conditions are described below.
The first working condition includes: the first valve 105 is in an open state, the second valve 106 is in a closed state, and at least one of the third valve 107 and the fourth valve 108 is in a closed state; alternatively, the first valve 105 is in an open state, the second valve 106 is in a closed state, the third valve 107 is in a closed state, and the fourth valve 108 is in a closed state, so that the composite heat pump drying system 100 does not perform heat transfer with the outside air.
The second working condition includes: if the second port of the second valve 106 is connected to the pipeline between the first valve 105 and the first heat exchanger 101, i.e. in the solution shown in fig. 1, the first valve 105 is in a closed state, the second valve 106 is in an open state, the third valve 107 is in a closed state, and the fourth valve 108 is in an open state, so that heat is rapidly absorbed from the outside air (i.e. a large amount of heat is absorbed).
In the solution shown in fig. 2, the second valve 106 is connected to the first valve 105 and the second heat exchanger 102 through a pipeline, and at this time, the first valve 105 may be in an open state, the second valve 106 may be in an open state, the third valve 107 may be in a closed state, and the fourth valve 108 may be in an open state, so as to basically achieve a technical effect of absorbing heat from the outside air.
The third operating mode includes: if the second valve 106 is connected to the pipeline between the first valve 105 and the second heat exchanger 102, i.e. in the scheme shown in fig. 2, the first valve 105 may be in a closed state, the second valve 106 is in an open state, the third valve 107 is in an open state, and the fourth valve 108 is in a closed state, so that heat is rapidly released (i.e. a large amount of heat is released) to the outside air.
In the solution shown in fig. 1, the second port of the second valve 106 is connected to the first valve 105 and the first heat exchanger 101 through a pipeline, so that the first valve 105 is in an open state, the second valve 106 is in an open state, the third valve 107 is in an open state, and the fourth valve 108 is in a closed state, so as to basically release heat to the outside air.
The fourth working condition includes: the first valve 105 is in an open state, the second valve 106 is in an open state, the third valve 107 is in a closed state, and the fourth valve 108 is in an open state, thereby slowly absorbing heat (i.e., partially absorbing heat) from the outside air.
The fifth operating mode includes: the first valve 105 is in an open state, the second valve 106 is in an open state, the third valve 107 is in an open state, and the fourth valve 108 is in a closed state, thereby slowly releasing heat (i.e., partially releasing heat) from the outside air.
It should be noted that in the embodiments of the present invention, the above five working conditions may not completely occur, that is, in some embodiments, only one, two, three or four of the above five working conditions may be implemented. In the following embodiments, at least three of the above five conditions can be implemented; of course, any working condition may be implemented in the embodiments of the present invention.
Meanwhile, it should be noted that the third heat exchanger 103 may be an air-cooled heat exchanger or another type of heat exchanger; also, the embodiment of the present invention is not particularly limited with respect to the specific types of the first heat exchanger 101 and the second heat exchanger 102. The first heat exchanger 101, the second heat exchanger 102 and the third heat exchanger 103 given in the drawing part of the present description are only simple illustrations and not specific heat exchanger configurations. Also, the valves and the like are shown by way of illustration only and not by way of limitation.
It should be further noted that, in the embodiment of the present invention, at least one of the above five working conditions is implemented by setting a valve, etc., so that flexible adjustment of the heat pump drying system can be implemented, so as to meet the requirements of different drying materials, drying process requirements, etc. on the drying system; that is, the heat pump drying system provided by the embodiment of the invention can realize various drying requirements, including the requirements of drying objects, the requirements of drying technology and the like.
Referring to fig. 3 and 4, the hybrid heat pump drying system may further include a fifth valve 109 and a sixth valve 110. The two ends of the fifth valve 109 are respectively connected with the second port of the second valve 106 and the pipeline between the first valve 105 and the first heat exchanger 101, and the two ends of the sixth valve 110 are respectively connected with the second port of the second valve 106 and the pipeline between the first valve 105 and the second heat exchanger 102.
In this embodiment, at least one of the above five working conditions may be implemented, and the working states of the valves under the specific working conditions may be referred to as follows.
The first working condition includes: the first valve 105 is in an open state, the second valve 106 is in a closed state, at least one of the third valve 107 and the fourth valve 108 is in a closed state, and at least one of the fifth valve 109 and the sixth valve 110 is in a closed state;
alternatively, the first valve 105 is in an open state, the second valve 106 is in an open or closed state, at least one of the third valve 107 and the fourth valve 108 is in a closed state, the fifth valve 109 is in a closed state, and the sixth valve 110 is in a closed state;
alternatively, the first valve 105 is in an open state, the second valve 106 is in an open or closed state, the third valve 107 is in a closed state, the fourth valve 108 is in a closed state, and at least one of the fifth valve 109 and the sixth valve 110 is in a closed state.
The second working condition includes: the first valve 105 is in a closed state, the second valve 106 is in an open state, the third valve 107 is in a closed state, the fourth valve 108 is in an open state, the fifth valve 109 is in an open state, and the sixth valve 110 is in a closed state.
The third operating mode includes: the first valve 105 is in a closed state, the second valve 106 is in an open state, the third valve 107 is in an open state, the fourth valve 108 is in a closed state, the fifth valve 109 is in a closed state, and the sixth valve 110 is in an open state.
The fourth working condition includes: the first valve 105 is in an open state, the second valve 106 is in an open state, the third valve 107 is in a closed state, the fourth valve 108 is in an open state, one of the fifth valve 109 and the sixth valve 110 is in a closed state, and the other is in an open state.
The fifth operating mode includes: the first valve 105 is in an open state, the second valve 106 is in an open state, the third valve 107 is in an open state, the fourth valve 108 is in a closed state, one of the fifth valve 109 and the sixth valve 110 is in a closed state, and the other is in an open state.
Alternatively, in the solution shown in fig. 3, the second valve 106 may be an electric regulating valve or an electronic expansion valve, the fifth valve 109 may be an electric two-way valve, and the sixth valve 110 may be an electric two-way valve; alternatively, referring to fig. 4, the second valve 106 may be an electric two-way valve, the fifth valve 109 may be a one-way valve or an electric two-way valve, and the sixth valve 110 may be a one-way valve or an electric two-way valve; alternatively, the fifth valve 109 and the sixth valve 110 constitute a three-way valve (i.e., the second three-way valve 119 in fig. 11), and three ports of the three-way valve are connected to both-end pipes of the first valve 105 and the second port of the second valve 106, respectively.
It should also be understood that in the embodiments of the present invention, some of the valves may be replaced by three-way valves, four-way valves, etc., which should be understood to be within the scope of the embodiments of the present invention.
Referring to fig. 5 and 6, in an alternative embodiment, the second port of the second valve 106 is in plumbing connection with the first valve 105 and the second heat exchanger 102; the composite heat pump drying system 100 further comprises a seventh valve 111, a first port of the seventh valve 111 is connected with a pipeline between the first valve 105 and the first heat exchanger 101, and a second port of the seventh valve 111 is connected with a pipeline between the second valve 106 and the third heat exchanger 103.
In this embodiment, the operating states of the valve under each of the working conditions include at least one of the first working condition, the third working condition, the fourth working condition, and the fifth working condition described above, and the following may be specifically referred to.
The first working condition includes: the first valve 105 is in an open state, the second valve 106 is in a closed state, at least one of the third valve 107 and the fourth valve 108 is in a closed state, and the seventh valve 111 is in a closed state.
The third operating mode includes: the first valve 105 is in a closed state, the second valve 106 is in an open state, the third valve 107 is in an open state, the fourth valve 108 is in a closed state, and the seventh valve 111 is in a closed state.
The fourth working condition includes: the first valve 105 is in an open state, and the second valve 106 is in an open state; the third valve 107 is in a closed state, the fourth valve 108 is in an open state, and the seventh valve 111 is in an open state.
The fifth operating mode includes: the first valve 105 is in an open state, and the second valve 106 is in an open state; the third valve 107 is in an open state, the fourth valve 108 is in a closed state, and the seventh valve 111 is in a closed state.
Optionally, the seventh valve 111 is a check valve (see fig. 5) or an electric valve (see fig. 6), and when the seventh valve 111 is a check valve, the refrigerant can flow from the first port of the seventh valve 111 to the second port of the seventh valve 111.
Referring to fig. 7-9, in an alternative embodiment, the second port of the second valve 106 is in plumbing connection with the first valve 105 and the second heat exchanger 102; the composite heat pump drying system 100 further comprises an eighth valve 112, a first port of the eighth valve 112 is connected to a pipeline between the first heat exchanger 101 and the first valve 105, and a second port of the eighth valve 112 is connected to a pipeline between the second valve 106 and the third heat exchanger 103.
It should be noted that, in the technical solutions shown in fig. 7 to 9, the composite heat pump drying system 100 may include at least one of the following first, fourth and fifth working conditions.
The first working condition includes: the first valve 105 is in an open state, the second valve 106 is in a closed state, the third valve 107 is in a closed state, the fourth valve 108 is in a closed state, and the eighth valve 112 is in a closed state;
the fourth working condition includes: the first valve 105 is in an open state, the second valve 106 is in an open state, the third valve 107 is in a closed state, the fourth valve 108 is in an open state, and the eighth valve 112 is in a closed state;
the fifth operating mode includes: the first valve 105 is in an open state, the second valve 106 is in a closed state, the third valve 107 is in an open state, the fourth valve 108 is in a closed state, and the eighth valve 112 is in an open state.
Referring to fig. 7, the second valve 106 and the eighth valve 112 are both check valves, and the refrigerant can flow from the second port of the second valve 106 to the first port of the second valve 106, and the refrigerant can flow from the second port of the eighth valve 112 to the first port of the eighth valve 112; referring to fig. 8 and 9, the second valve 106 is an electric regulating valve or an electronic expansion valve, the eighth valve 112 is a one-way valve, and the second port of the eighth valve 112 flows to the first port of the eighth valve 112.
Referring to fig. 10, the third valve 107 and the fourth valve 108 form a three-way valve, i.e., the first three-way valve 118 shown in fig. 10; the three ports of the first three-way valve 118 are connected to the discharge port and the suction port of the compressor 104 and the first port of the third heat exchanger 103, respectively.
Meanwhile, in the schemes shown in fig. 3 and 4, the fifth valve 109 and the sixth valve 110 may also constitute a three-way valve; referring to fig. 11, the fifth valve 109 and the sixth valve 110 form a second three-way valve 119, and three ports of the second three-way valve 119 are connected to two-end pipelines of the first valve 105 and a second port of the second valve 106, respectively.
Referring to fig. 12, in an alternative embodiment, the third valve 107 and the fourth valve 108 are two ports of the four-way valve 120, and the four ports of the four-way valve 120 are respectively connected to the exhaust port, the air suction port of the compressor 104, the first port of the third heat exchanger 103, and the second port of the second heat exchanger 102; the two ends of the first valve 105 are respectively connected with the first heat exchanger 101 and the second heat exchanger 102, the first port of the second valve 106 is connected with the third heat exchanger 103, and the second port of the second valve 106 is connected with a pipeline between the first valve 105 and the second heat exchanger 102.
At this time, at least one of the above-described first, second, third, and fifth conditions may be implemented.
The first working condition includes: the four-way valve 120 connects the third heat exchanger 103 to the discharge port of the compressor 104, and the first valve 105 is opened and the second valve 106 is closed.
The second working condition includes: the four-way valve 120 connects the third heat exchanger 103 to the intake port of the compressor 104, and the first valve 105 is in an open state and the second valve 106 is in an open state.
The third operating mode includes: the four-way valve 120 connects the third heat exchanger 103 to the discharge port of the compressor 104, and the first valve 105 is closed and the second valve 106 is opened.
The fifth operating mode includes: the four-way valve 120 connects the third heat exchanger 103 to the discharge port of the compressor 104, and the first valve 105 is in an open state and the second valve 106 is in an open state.
Referring to fig. 13, in an alternative embodiment, the third valve 107 and the fourth valve 108 are two ports of the four-way valve 120, and the four ports of the four-way valve 120 are respectively connected to the exhaust port, the air suction port of the compressor 104, the first port of the third heat exchanger 103, and the second port of the second heat exchanger 102; the composite heat pump drying system 100 further comprises a ninth valve 113, two ports of the ninth valve 113 are respectively connected with the first valve 105 and the port of the first heat exchanger 101, and a second port of the second valve 106 is connected with a pipeline between the ninth valve 113 and the first valve 105.
At this time, at least one of the above-described first, second, third, and fifth conditions may be implemented.
The first working condition includes: the four-way valve 120 connects the third heat exchanger 103 to the discharge port of the compressor 104, the first valve 105 is in an open state, the second valve 106 is in a closed state, and the ninth valve 113 is in an open state.
The second working condition includes: the four-way valve 120 connects the third heat exchanger 103 to the intake port of the compressor 104, the first valve 105 is in an open state, the second valve 106 is in an open state, and the ninth valve 113 is in a closed state.
The third operating mode includes: the four-way valve 120 connects the third heat exchanger 103 to the discharge port of the compressor 104, the first valve 105 is in an open state, the second valve 106 is in an open state, and the ninth valve 113 is in a closed state.
The fifth operating mode includes: the four-way valve 120 connects the third heat exchanger 103 to the discharge port of the compressor 104, the first valve 105 is in an open state, the second valve 106 is in an open state, and the ninth valve 113 is in an open state.
Referring to fig. 1 to 13 in combination, in an alternative embodiment, the composite heat pump drying system 100 further includes a water tray 114 and a drainage tube 115, the water tray 114 is disposed below the second heat exchanger 102, and the drainage tube 115 is connected to the water tray 114.
Referring to fig. 14, meanwhile, the composite heat pump drying system 100 further includes a blower 116, and a drainage tube 115 extends to the third heat exchanger 103 for guiding condensed water to a surface of the third heat exchanger 103, where the blower 116 is used to flow gas through the surface of the third heat exchanger 103.
Referring to fig. 15, in an alternative embodiment of the present invention, the composite heat pump drying system 100 may further include a fourth heat exchanger 117, the first heat exchanger 101, the second heat exchanger 102 and the fourth heat exchanger 117 are located in the same air duct, and the gas flows along the fourth heat exchanger 117, the second heat exchanger 102 and the first heat exchanger 101 in sequence; the fourth heat exchanger 117 is connected with a drainage tube 115, the drainage tube 115 is used for guiding water in the water receiving disc 114 to a water inlet of the fourth heat exchanger 117, and a water outlet of the fourth heat exchanger 117 is used for leading out water.
Referring to fig. 1 to 15 in combination, a composite heat pump drying system 100 according to an embodiment of the present invention is provided: under the condition that the function of conventional closed drying can be realized, the purposes of further realizing that the heat energy is further supplemented or released to the drying room under the condition of a large amount of dehumidification drying for different drying objects and drying processes, or the heat energy is supplemented or released to the drying room in a large amount, and the temperature required by the drying room is flexibly and quickly adjusted are achieved, so that the whole process is more energy-saving and the adjusting time is shorter. The system can be used for adjusting different drying objects and different drying processes, realizing various working modes, meeting different drying requirements, achieving the purpose of flexibly and rapidly adjusting the temperature required by a drying room, and enabling the whole process to be more energy-saving and shorter in adjusting time. For example, when the closed drying system needs to raise the temperature of the drying room, the conventional method is to start electric heating of a part of the inside of the system, so that the power consumption is high, the reaction is slow, and under the condition of the embodiment, the heat which can be provided can reach 3-4 times under the same power distribution, so that the heating process of the drying room becomes easier, more flexible and faster, and on the other hand, the energy is saved by more than 50% compared with the traditional scheme.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A composite heat pump drying system (100) is characterized by comprising a first heat exchanger (101), a second heat exchanger (102), a third heat exchanger (103), a compressor (104), a first valve (105), a second valve (106), a third valve (107) and a fourth valve (108);
the first heat exchanger (101) and the second heat exchanger (102) are positioned in the same air duct, and gas flows along the second heat exchanger (102) and the first heat exchanger (101) in sequence;
an exhaust port of the compressor (104) is connected with an inlet of the first heat exchanger (101), an outlet of the first heat exchanger (101) is connected with an inlet of the second heat exchanger (102), an outlet of the second heat exchanger (102) is connected with an air suction port of the compressor (104), and the first valve (105) is arranged on a pipeline between the first heat exchanger (101) and the second heat exchanger (102);
A first port of the third heat exchanger (103) is connected with a first port of the second valve (106), a second port of the second valve (106) is connected with a pipeline between the first valve (105) and the first heat exchanger (101), or a second port of the second valve (106) is connected with a pipeline between the first valve (105) and the second heat exchanger (102);
the second port of the third heat exchanger (103) is respectively connected with the ports of the third valve (107) and the fourth valve (108), the other port of the third valve (107) is connected with the exhaust port of the compressor (104), and the other port of the fourth valve (108) is connected with the air suction port of the compressor (104);
the working conditions of the composite heat pump drying system (100) comprise at least one of a first working condition, a second working condition, a third working condition, a fourth working condition and a fifth working condition;
under the first working condition, the composite heat pump drying system does not transfer heat with the outside air;
under the second working condition, the composite heat pump drying system absorbs heat from the outside air rapidly;
under the third working condition, the composite heat pump drying system rapidly releases heat to the outside air;
In the fourth working condition, the composite heat pump drying system absorbs heat from the outside air at a low speed;
under the fifth working condition, the composite heat pump drying system releases heat to the outside air at a low speed;
the first working condition includes: -the first valve (105) is in an open state, the second valve (106) is in a closed state, and at least one of the third valve (107) and the fourth valve (108) is in a closed state; or the first valve (105) is in an open state, the second valve (106) is in a closed state, the third valve (107) is in a closed state, and the fourth valve (108) is in a closed state;
the second working condition includes: if a second port of the second valve (106) is connected with a pipeline between the first valve (105) and the first heat exchanger (101), the first valve (105) is in a closed state, the second valve (106) is in an open state, the third valve (107) is in a closed state, and the fourth valve (108) is in an open state;
the third working condition includes: if the second valve (106) is connected with the pipeline between the first valve (105) and the second heat exchanger (102), the first valve (105) is in a closed state, the second valve (106) is in an open state, the third valve (107) is in an open state, and the fourth valve (108) is in a closed state;
The fourth operating condition includes: the first valve (105) is in an open state, the second valve (106) is in an open state, the third valve (107) is in a closed state, and the fourth valve (108) is in an open state;
the fifth operating condition includes: the first valve (105) is in an open state, the second valve (106) is in an open state, the third valve (107) is in an open state, and the fourth valve (108) is in a closed state.
2. The composite heat pump drying system (100) of claim 1, further comprising a fifth valve (109) and a sixth valve (110);
two ends of the fifth valve (109) are respectively connected with a second port of the second valve (106) and a pipeline between the first valve (105) and the first heat exchanger (101), and two ends of the sixth valve (110) are respectively connected with a second port of the second valve (106) and a pipeline between the first valve (105) and the second heat exchanger (102);
the first working condition includes: -the first valve (105) is in an open state, the second valve (106) is in a closed state, at least one of the third valve (107) and the fourth valve (108) is in a closed state, and at least one of the fifth valve (109) and the sixth valve (110) is in a closed state;
Alternatively, the first valve (105) is in an open state, the second valve (106) is in an open or closed state, at least one of the third valve (107) and the fourth valve (108) is in a closed state, the fifth valve (109) is in a closed state, and the sixth valve (110) is in a closed state;
alternatively, the first valve (105) is in an open state, the second valve (106) is in an open or closed state, the third valve (107) is in a closed state, the fourth valve (108) is in a closed state, and at least one of the fifth valve (109) and the sixth valve (110) is in a closed state;
the second working condition includes: the first valve (105) is in a closed state, the second valve (106) is in an open state, the third valve (107) is in a closed state, the fourth valve (108) is in an open state, the fifth valve (109) is in an open state, and the sixth valve (110) is in a closed state;
the third working condition includes: the first valve (105) is in a closed state, the second valve (106) is in an open state, the third valve (107) is in an open state, the fourth valve (108) is in a closed state, the fifth valve (109) is in a closed state, and the sixth valve (110) is in an open state;
The fourth operating condition includes: the first valve (105) is in an open state, the second valve (106) is in an open state, the third valve (107) is in a closed state, the fourth valve (108) is in an open state, one of the fifth valve (109) and the sixth valve (110) is in a closed state, and the other valve is in an open state;
the fifth operating condition includes: the first valve (105) is in an open state, the second valve (106) is in an open state, the third valve (107) is in an open state, the fourth valve (108) is in a closed state, one of the fifth valve (109) and the sixth valve (110) is in a closed state, and the other is in an open state.
3. The composite heat pump drying system (100) of claim 2, wherein the second valve (106) is an electric regulating valve or an electronic expansion valve, the fifth valve (109) is an electric two-way valve, and the sixth valve (110) is an electric two-way valve;
or, the second valve (106) is an electric two-way valve, the fifth valve (109) is a one-way valve or an electric two-way valve, and the sixth valve (110) is a one-way valve or an electric two-way valve;
Or, the fifth valve (109) and the sixth valve (110) form a three-way valve, and three ports of the three-way valve are respectively connected with two end pipelines of the first valve (105) and a second port of the second valve (106).
4. The composite heat pump drying system (100) of claim 1, wherein a second port of the second valve (106) is connected to a conduit between the first valve (105) and the second heat exchanger (102);
the compound heat pump drying system (100) further comprises a seventh valve (111), wherein a first port of the seventh valve (111) is connected with a pipeline between the first valve (105) and the first heat exchanger (101), and a second port of the seventh valve (111) is connected with a pipeline between the second valve (106) and the third heat exchanger (103);
the first working condition includes: the first valve (105) is in an open state, the second valve (106) is in a closed state, at least one of the third valve (107) and the fourth valve (108) is in a closed state, and the seventh valve (111) is in a closed state;
The third working condition includes: the first valve (105) is in a closed state, the second valve (106) is in an open state, the third valve (107) is in an open state, the fourth valve (108) is in a closed state, and the seventh valve (111) is in a closed state;
the fourth operating condition includes: the first valve (105) is in an open state, and the second valve (106) is in an open state; the third valve (107) is in a closed state, the fourth valve (108) is in an open state, and the seventh valve (111) is in an open state;
the fifth operating condition includes: the first valve (105) is in an open state, and the second valve (106) is in an open state; the third valve (107) is in an open state, the fourth valve (108) is in a closed state, and the seventh valve (111) is in a closed state.
5. The composite heat pump drying system (100) of claim 4, wherein the seventh valve (111) is a one-way valve or an electrically operated valve, and wherein when the seventh valve (111) is a one-way valve, the refrigerant is capable of flowing from the first port of the seventh valve (111) to the second port of the seventh valve (111).
6. The composite heat pump drying system (100) of claim 1, wherein a second port of the second valve (106) is connected to a conduit between the first valve (105) and the second heat exchanger (102);
the composite heat pump drying system (100) further comprises an eighth valve (112), wherein a first port of the eighth valve (112) is connected with a pipeline between the first heat exchanger (101) and the first valve (105), and a second port of the eighth valve (112) is connected with a pipeline between the second valve (106) and the third heat exchanger (103);
the first working condition includes: the first valve (105) is in an open state, the second valve (106) is in a closed state, the third valve (107) is in a closed state, the fourth valve (108) is in a closed state, and the eighth valve (112) is in a closed state;
the fourth operating condition includes: the first valve (105) is in an open state, the second valve (106) is in an open state, the third valve (107) is in a closed state, the fourth valve (108) is in an open state, and the eighth valve (112) is in a closed state;
The fifth operating condition includes: the first valve (105) is in an open state, the second valve (106) is in a closed state, the third valve (107) is in an open state, the fourth valve (108) is in a closed state, and the eighth valve (112) is in an open state.
7. The composite heat pump drying system (100) of claim 6, wherein the second valve (106) and the eighth valve (112) are check valves, wherein a refrigerant is capable of flowing from the second port of the second valve (106) to the first port of the second valve (106), and wherein a refrigerant is capable of flowing from the second port of the eighth valve (112) to the first port of the eighth valve (112);
or, the second valve (106) is an electric regulating valve or an electronic expansion valve, the eighth valve (112) is a one-way valve, and the second port of the eighth valve (112) flows to the first port of the eighth valve (112).
8. The composite heat pump drying system (100) according to any one of claims 1-7, wherein the third valve (107) and the fourth valve (108) constitute a three-way valve, three ports of which are connected with the exhaust port, the suction port of the compressor (104) and the first port of the third heat exchanger (103), respectively.
9. The composite heat pump drying system (100) according to any one of claims 1-7, wherein the third valve (107) and the fourth valve (108) are two ports in a four-way valve (120), the four ports of the four-way valve (120) being connected with the exhaust port, the suction port of the compressor (104), the first port of the third heat exchanger (103) and the second port of the second heat exchanger (102), respectively;
the two ends of the first valve (105) are respectively connected with the first heat exchanger (101) and the second heat exchanger (102), a first port of the second valve (106) is connected with the third heat exchanger (103), and a second port of the second valve (106) is connected with a pipeline between the first valve (105) and the second heat exchanger (102);
the first working condition includes: the four-way valve (120) connects the third heat exchanger (103) with the exhaust port of the compressor (104), the first valve (105) is in an open state, and the second valve (106) is in a closed state;
the second working condition includes: the four-way valve (120) connects the third heat exchanger (103) with the air suction port of the compressor (104), the first valve (105) is in an open state, and the second valve (106) is in an open state;
The third working condition includes: the four-way valve (120) connects the third heat exchanger (103) with the exhaust port of the compressor (104), the first valve (105) is in a closed state, and the second valve (106) is in an open state;
the fifth operating condition includes: the four-way valve (120) enables the third heat exchanger (103) to be connected with the exhaust port of the compressor (104), the first valve (105) is in an open state, and the second valve (106) is in an open state.
10. The composite heat pump drying system (100) according to any one of claims 1-7, wherein the third valve (107) and the fourth valve (108) are two ports in a four-way valve (120), the four ports of the four-way valve (120) being connected with the exhaust port, the suction port of the compressor (104), the first port of the third heat exchanger (103) and the second port of the second heat exchanger (102), respectively;
the composite heat pump drying system (100) further comprises a ninth valve (113), wherein two ports of the ninth valve (113) are respectively connected with the ports of the first valve (105) and the first heat exchanger (101), and a second port of the second valve (106) is connected with a pipeline between the ninth valve (113) and the first valve (105);
The first working condition includes: the four-way valve (120) connects the third heat exchanger (103) with the exhaust port of the compressor (104), the first valve (105) is in an open state, the second valve (106) is in a closed state, and the ninth valve (113) is in an open state;
the second working condition includes: the four-way valve (120) connects the third heat exchanger (103) with the air suction port of the compressor (104), the first valve (105) is in an open state, the second valve (106) is in an open state, and the ninth valve (113) is in a closed state;
the third working condition includes: the four-way valve (120) connects the third heat exchanger (103) with the exhaust port of the compressor (104), the first valve (105) is in an open state, the second valve (106) is in an open state, and the ninth valve (113) is in a closed state;
the fifth operating condition includes: the four-way valve (120) enables the third heat exchanger (103) to be connected with the exhaust port of the compressor (104), the first valve (105) is in an open state, the second valve (106) is in an open state, and the ninth valve (113) is in an open state.
11. The composite heat pump drying system (100) according to any one of claims 1-7, wherein the composite heat pump drying system (100) further comprises a water pan (114) and a drain tube (115), the water pan (114) being disposed below the second heat exchanger (102), the drain tube (115) being connected to the water pan (114).
12. The composite heat pump drying system (100) of claim 11, wherein the composite heat pump drying system (100) further comprises a blower (116), the draft tube (115) extending to the third heat exchanger (103) for directing condensate to a surface of the third heat exchanger (103), the blower (116) for flowing gas across a surface of the third heat exchanger (103).
13. The composite heat pump drying system (100) of claim 11, wherein the composite heat pump drying system (100) further comprises a fourth heat exchanger (117), the first heat exchanger (101), the second heat exchanger (102) and the fourth heat exchanger (117) are located within the same air duct, and gas flows along the fourth heat exchanger (117), the second heat exchanger (102) flow and the first heat exchanger (101) in sequence;
The fourth heat exchanger (117) is connected with the drainage tube (115), the drainage tube (115) is used for guiding water in the water receiving disc (114) to a water inlet of the fourth heat exchanger (117), and a water outlet of the fourth heat exchanger (117) is used for leading out water.
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| CN202011188000.0A CN112197570B (en) | 2020-10-29 | 2020-10-29 | Composite heat pump drying system |
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| CN202011188000.0A CN112197570B (en) | 2020-10-29 | 2020-10-29 | Composite heat pump drying system |
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| CN112197570B true CN112197570B (en) | 2023-08-25 |
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