Drying equipment

Abstract

The invention provides drying equipment. The drying equipment comprises a drying chamber used for containing objects to be dried; the air duct shell is communicated with the drying chamber; the heat pump unit is connected to the air duct shell and is provided with a refrigerant circulating channel; the external evaporator is connected to the air duct shell, can exchange heat with the external environment of the drying chamber and is connected with the refrigerant circulating channel; the operation stage of the drying equipment comprises a temperature rising stage and a temperature stabilizing stage, and in the temperature rising stage, the external evaporator is controlled to work; and in the temperature stabilizing stage, the external evaporator is controlled not to work. In this way, the drying time can be shortened, and low-temperature drying is achieved.

Description

Technical Field

[0001] The present application relates to the field of drying technology, and in particular to a drying device. Background Art

[0002] As living standards continue to improve, washing machines, such as those that simply wash, are increasingly insufficient. People now demand a drying function after washing, or a separate drying device for drying clothes. Drying methods generally include: electrically heated water condensation drying systems, electrically heated air condensation drying systems, and heat pump heating drying systems that combine evaporator condensation with condenser heating. Compared to the first two drying methods, heat pump drying is more energy-efficient and has broad market application prospects.

[0003] In the related art, drying equipment using heat pumps for drying has a long drying time. Shortening this time is a key research topic in this field. The slow temperature rise in the drying chamber contributes to the long drying time. To address this, the related art addresses the issue of long drying times by adding new heat sources (such as electric auxiliary heating) or increasing the power of the heat pump system. However, both electric auxiliary heating and increased power can lead to excessively high temperatures in the drying chamber, which can damage the items being dried. Summary of the Invention

[0004] The present application provides a drying device to shorten the drying time and achieve low-temperature drying.

[0005] To solve the above-mentioned technical problems, the present application adopts a technical solution: providing a drying device. The drying device comprises: a drying chamber for accommodating items to be dried; an air duct housing communicating with the drying chamber; a heat pump unit connected to the air duct housing and having a refrigerant circulation channel; an external evaporator connected to the air duct housing, capable of heat exchange with the external environment of the drying chamber, and connected to the refrigerant circulation channel. The drying device operates in two phases: a heating phase and a temperature stabilization phase. During the heating phase, the external evaporator is controlled to operate; during the temperature stabilization phase, the external evaporator is controlled to not operate.

[0006] Among them, the air duct shell also forms a heat exchange cavity connected to the drying chamber. The heat pump unit includes a compressor, a condenser and a built-in evaporator. The condenser and the built-in evaporator are arranged in the heat exchange cavity, and the external evaporator and the compressor are arranged outside the heat exchange cavity.

[0007] Among them, the operation stage also includes a temperature stabilization stage, and the drying equipment also includes: a first fan, located outside the heat exchange chamber, and an external evaporator is located between the first fan and the compressor; the first fan is controlled to work in the heating stage to promote heat exchange between the external evaporator and the external environment; the first fan is controlled to stop working in the temperature stabilization stage to reduce heat exchange between the external evaporator and the external environment.

[0008] Among them, the condenser is connected to the outlet of the compressor; the heat pump unit also includes a first throttling device, the external evaporator is connected to the condenser, and the first throttling device is arranged between the external evaporator and the condenser; the built-in evaporator is respectively connected to the external evaporator and the inlet of the compressor.

[0009] The heat pump unit further includes a second throttling member, the external evaporator is also connected to the inlet of the compressor, and the second throttling member is arranged between the condenser and the built-in evaporator.

[0010] The heat pump unit further includes a second throttling member, which is arranged between the built-in evaporator and the condenser; the external evaporator is connected to the built-in evaporator and the inlet of the compressor respectively.

[0011] The condenser and the built-in evaporator are arranged in the heat exchange cavity of the air duct shell along a first horizontal direction.

[0012] The drying device further comprises: a partition plate, which is arranged between the built-in evaporator and the bottom wall of the heat exchange chamber, and a water accumulation portion or a drainage hole is also provided on the bottom wall.

[0013] Among them, the drying equipment also includes: an air duct mechanism, which is arranged at the connection between the heat exchange cavity and the drying chamber, and its air duct is connected to the heat exchange cavity and the drying chamber respectively; a second fan, which is arranged in the air duct.

[0014] The heat exchange chamber is provided with an air outlet connected to the drying chamber and an air inlet arranged opposite to the air outlet; the distance between the external evaporator and the air inlet is smaller than the distance between the external evaporator and the air outlet.

[0015] The beneficial effects of the present application are as follows: the drying equipment of the present application is provided with an external evaporator, and the external evaporator can exchange heat with the external environment of the drying chamber, so that the external evaporator can exchange heat with the external environment during the heating stage of the drying equipment, thereby discharging part of the cold air to the outside of the air duct shell through the external evaporator, and the refrigerant of the external evaporator can absorb external heat to achieve a rapid increase in the temperature in the drying chamber, thereby shortening the drying time; and because the embodiment of the present application shortens the drying time through an external evaporator, there is no need to set up an auxiliary heat source or increase the power of the drying equipment, so low-temperature drying of the drying equipment can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0017] Figure 1This is a structural diagram of the first embodiment of the drying equipment of the present application;

[0018] Figure 2 This is a structural diagram of the second embodiment of the drying equipment of the present application;

[0019] Figure 3 This is a structural diagram of the third embodiment of the drying equipment of the present application;

[0020] Figure 4 This is a structural diagram of the fourth embodiment of the drying equipment of the present application;

[0021] Figure 5 This is a structural diagram of the fifth embodiment of the drying equipment of the present application;

[0022] Figure 6 yes Figure 5 Schematic diagram of the explosion structure of the drying equipment in the embodiment;

[0023] Figure 7 This is a structural diagram of part of the structure of the sixth embodiment of the drying equipment of the present application;

[0024] Figure 8 yes Figure 7 Schematic diagram of the explosion structure of the drying equipment in the embodiment. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0027] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise specifically defined.

[0028] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0032] The drying equipment in the embodiment of the present application may include a clothes dryer, a dry-cleaner, a dryer, and other household appliances with at least a drying function. The embodiment of the present application is described using a clothes dryer as an example.

[0033] In the related art, clothes dryers generally have a long drying time of more than 100 minutes. How to shorten the drying time is a research focus in this field. The slow temperature rise in the drying chamber is one factor that causes the long drying time.

[0034] In the related art, the problem of long drying time is solved by adding a new heat source or increasing the power of the heat pump system. However, whether it is electric auxiliary heating or increasing the power, it will cause the temperature in the drying room to be too high, which is easy to damage the dried items.

[0035] For this purpose, the present application proposes a drying device such as Figure 1 As shown, Figure 1 This is a structural diagram of the first embodiment of the drying equipment of this application. The drying equipment of this embodiment includes: a drying chamber 40 (see Figure 5-Figure 8 );Air duct housing 16 (see Figure 5-Figure 8 ), heat pump unit 01 and external evaporator 12; wherein, the drying chamber 40 is used to accommodate the objects to be dried; the air duct shell 16 is connected to the drying chamber; the heat pump unit 01 is connected to the air duct shell 16 and has a refrigerant circulation channel; the external evaporator 12 is connected to the air duct shell 16, can exchange heat with the external environment of the drying chamber 40, and is connected to the refrigerant circulation channel; the operating stage of the drying equipment includes a heating stage, and in the heating stage, the external evaporator 12 is controlled to work.

[0036] The air duct housing 16 supports the heat pump unit 01 and the external evaporator 12 to improve the structural stability of the drying equipment.

[0037] The external evaporator 12 performs heat exchange with the external environment of the drying chamber 40 , absorbing heat from the external environment to the drying chamber 40 , thereby achieving rapid temperature increase of the drying chamber 40 .

[0038] The drying equipment of this embodiment is provided with an external evaporator 12, and the external evaporator 12 can exchange heat with the external environment, so that the external evaporator 12 can exchange heat with the external environment during the heating stage of the drying equipment, thereby discharging part of the cold air to the outside of the air duct shell through the external evaporator 12. The refrigerant of the external evaporator 12 can absorb external heat and realize a rapid increase in the temperature in the drying chamber 40, thereby shortening the drying time; and because this embodiment shortens the drying time through the external evaporator 12, there is no need to set up an auxiliary heat source or increase the power of the drying equipment, so low-temperature drying of the drying equipment can be achieved.

[0039] Optionally, the air duct housing 16 further defines a heat exchange chamber connected to the drying chamber 40. The heat pump unit 01 includes a compressor 11, a condenser 13, and an internal evaporator 14. The condenser 13 and the internal evaporator 14 are disposed within the heat exchange chamber, exchanging heat with the internal environment of the drying chamber 40. The external evaporator 12 and the compressor 11 are disposed outside the heat exchange chamber. This reduces the impact of the external environment, the external evaporator 12, and the compressor 11 on the temperature within the heat exchange chamber and the drying chamber 40.

[0040] Among them, the evaporation component of the drying equipment includes two parts, one part is located in the heat exchange chamber, used to condense the water vapor in the air duct shell 16, and the other part is located outside the heat exchange chamber, used to absorb heat from the external environment to achieve a rapid increase in temperature in the drying chamber 40.

[0041] Optionally, the operation phase of the drying equipment includes a heating phase and a temperature stabilization phase. In the heating phase, the external evaporator 12 is controlled to operate; in the temperature stabilization phase, the external evaporator 12 is controlled not to operate.

[0042] Among them, controlling the external evaporator 12 to work means to make the external evaporator 12 and the external environment to exchange heat effectively, so that it becomes an effective evaporator; controlling the external evaporator 12 to work partially means to make the heat exchange between the external evaporator 12 and the external environment negligible, so that it becomes an ineffective evaporator.

[0043] The temperature rising stage refers to the stage in which the temperature in the drying chamber increases, and the temperature stabilizing stage refers to the stage in which the temperature in the drying chamber is maintained within a set temperature range or a certain set temperature.

[0044] Among them, the heating stage is the stage in which the temperature in the drying chamber rises rapidly. During the heating stage, the temperature in the drying chamber 40 needs to rise rapidly to the preset temperature so that the liquid in the drying chamber 40 can be quickly evaporated and condensed and discharged; the temperature stabilization stage is located after the heating stage. After the temperature in the drying chamber 40 reaches the preset temperature, in order to ensure the drying effect in the drying chamber 40 and not damage the objects to be dried in the drying chamber 40, the temperature in the drying chamber 40 needs to be maintained at the set temperature or within the set temperature range.

[0045] In one application scenario, in the initial working stage of the dryer, that is, the heating stage, the external evaporator 12 can be effectively heat-exchanged with the external environment, so as to quickly provide heat to the drying chamber 40 of the dryer through the external evaporator 12, so that the drying chamber 40 is quickly heated up, which can shorten the drying time; when the drying temperature in the drying chamber 40 reaches the preset temperature, that is, enters the steady temperature stage, the external evaporator 12 does not exchange heat with the external environment, or the heat exchange amount is very small and can be ignored, and part of the heat in the high-pressure and high-temperature steam provided by the compressor 11 is dissipated into the drying chamber 40 through the condenser 13, so that the temperature in the drying chamber 40 will not be too high.

[0046] The preset temperature may be 45°C to 80°C.

[0047] Optionally, the preset temperature may be 50°C to 75°C, such as 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, etc.

[0048] The external evaporator 12 of the drying equipment of this embodiment is arranged outside the heat exchange chamber, and can enable the external evaporator 12 to effectively exchange heat with the external environment during the heating stage of the drying equipment, so that part of the cold air is discharged to the outside of the air duct shell 16 through the external evaporator 12. The refrigerant of the external evaporator 12 can absorb external heat, thereby realizing a rapid increase in the temperature in the drying chamber 40, thereby shortening the drying time; and because this embodiment shortens the drying time through the external evaporator 12, there is no need to set up an auxiliary heat source or increase the power of the drying equipment, so low-temperature drying of the drying equipment can be achieved.

[0049] Optionally, the condenser 13 and the built-in evaporator 14 are connected in series between the outlet and the inlet of the compressor 11 .

[0050] Optionally, the condenser 13 is connected to the outlet of the compressor 11 and the external evaporator 12; the heat pump unit 01 also includes a first throttling device 15, which is arranged between the external evaporator 12 and the condenser 13; the built-in evaporator 14 is respectively connected to the external evaporator 12 and the inlet of the compressor 11.

[0051] Among them, the compressor 11 is the power source of the drying equipment, which is used to convert the low-temperature and low-pressure refrigerant vapor from the evaporation component (built-in evaporator 14) into high-temperature and high-pressure refrigerant vapor after adiabatic compression to the condenser 13; the condenser 13 is also connected to the first throttling device 15, which is used to condense the high-temperature and high-pressure refrigerant vapor coming out of the compressor 11 under isobaric conditions, and dissipate heat to the drying chamber 40, and the refrigerant in the condenser 13 becomes a high-pressure supercooled liquid; the first throttling device 15 is also connected to the external evaporator 12, and the high-pressure supercooled liquid coming out of the condenser 13 is throttled by the first throttling device 15 to become a low-temperature and low-pressure refrigerant vapor, and enters the external evaporator 12 and the built-in evaporator 14 in turn to evaporate, absorb the heat of the moist and hot medium in the drying chamber 40, and become a low-temperature and low-pressure refrigerant vapor to the compressor 11, and the water vapor in the moist and hot medium in the drying chamber 40 is condensed into condensed water and discharged.

[0052] The first throttling element 15 may include at least one of an expansion valve, a throttle valve, a throttle plate, and a capillary tube.

[0053] Optionally, the drying equipment of this embodiment also includes a first pipeline 21, a second pipeline 22, a third pipeline 23 and a fourth pipeline 24, one end of the first pipeline 21 is connected to the outlet of the compressor 11, and the other end of the first pipeline 21 is connected to the condenser 13; one end of the second pipeline 22 is connected to the external evaporator 12, and the other end of the second pipeline 22 is connected to the condenser 13; one end of the third pipeline 23 is connected to the external evaporator 12, and the other end of the third pipeline 23 is connected to the built-in evaporator 14, and the throttling device 15 is arranged on the second pipeline 22; one end of the fourth pipeline 24 is connected to the evaporator 14, and the other end of the fourth pipeline 24 is connected to the inlet of the compressor 11.

[0054] In this embodiment, the first pipeline 21, the second pipeline 22, the third pipeline 23 and the fourth pipeline 24 are independently arranged to respectively realize the connection between the outlet of the compressor 11 and the condenser 13, the connection between the external evaporator 12 and the condenser 13, the connection between the external evaporator 12 and the evaporator 14, and the connection between the evaporator 14 and the inlet of the compressor 11. This not only allows the compressor 11, the external evaporator 12, the built-in condenser 13 and the evaporator 14 to be provided with only two ports, thereby improving the reliability of these components, but also reduces the interference between the various pipelines, simplifies the pipeline structure, and improves the reliability of the drying equipment.

[0055] In one application scenario, during the heating stage of the dryer, the external evaporator 12 can effectively exchange heat with the external environment; the high-temperature and high-pressure refrigerant vapor output by the compressor 11 is transported to the condenser 13 through the first pipeline 21. The condenser 13 condenses the high-temperature and high-pressure refrigerant vapor to form a high-pressure supercooled liquid, and quickly provides heat to the drying chamber 40 of the dryer. The second pipeline 22 converts the high-pressure supercooled liquid coming out of the condenser 13 into a low-temperature and low-pressure refrigerant vapor after being throttled by the first throttle member 15, and then transported to the external evaporator 12. The external evaporator 12 absorbs heat from the external environment to quickly provide heat to the drying chamber 40 of the dryer, so that the drying chamber 40 is quickly heated up, which can shorten the drying time; the internal evaporator 14 absorbs heat from the moist heat medium in the drying chamber 40, so that the low-temperature and low-pressure refrigerant vapor is converted into low-temperature and low-pressure refrigerant vapor, which is transported to the compressor 11 through the fourth pipeline 24, and the water vapor in the moist heat medium in the drying chamber is condensed into condensed water and discharged.

[0056] In one application scenario, when the drying temperature in the drying chamber reaches a preset temperature, the dryer enters a steady temperature stage, so that the external evaporator 12 does not exchange heat with the external environment, or the amount of heat exchange is very small and can be ignored; the high-temperature and high-pressure refrigerant vapor output by the compressor 11 is transported to the condenser 13 through the first pipeline 21, and the condenser 13 dissipates the heat in the high-pressure and high-temperature vapor into the drying chamber 40; the second pipeline 22 converts the high-pressure supercooled liquid coming out of the condenser 13 into low-temperature and low-pressure refrigerant vapor after throttling by the first throttling device 15, and then transports it to the external evaporator 12 and then to the built-in evaporator 14. The built-in evaporator 14 absorbs the heat of the moist heat medium in the drying chamber, so that the low-temperature and low-pressure refrigerant vapor becomes low-temperature and low-pressure refrigerant vapor, and the low-temperature and low-pressure refrigerant vapor is transported to the compressor 11 through the fourth pipeline 24, and the water vapor in the moist heat medium in the drying chamber 40 is condensed into condensed water and discharged.

[0057] In another embodiment, if Figure 2 As shown, Figure 2This is a structural diagram of the second embodiment of the drying device of the present application. The drying device of this embodiment includes: a compressor 11, a condenser 13, an external evaporator 12, a built-in evaporator 14, a first throttle 15, a second throttle 18 and an air duct housing 16 (see Figure 5-Figure 8 ), drying room 40 (see Figure 5-Figure 8 ), wherein the heat exchange chamber formed by the air duct shell 16 is communicated with the drying chamber 40, and the condenser 13 is connected to the outlet of the external evaporator 12 and the compressor 11; the external evaporator 12 and the compressor 11 are arranged outside the heat exchange chamber, and the first throttle member 15 is arranged between the external evaporator 12 and the condenser 13; the built-in evaporator 14 and the condenser 13 are arranged in the heat exchange chamber, and the built-in evaporator 14 is respectively connected to the inlet of the external evaporator 12, the condenser 13 and the compressor 11; the external evaporator 12 is also connected to the inlet of the compressor 11, and the second throttle member 18 is arranged between the condenser 13 and the built-in evaporator 14; the external evaporator 12 can exchange heat with the external environment of the drying chamber.

[0058] The drying equipment of this embodiment Figure 1 The difference between the drying equipment of the embodiment is that the heat pump unit 01 further includes a second throttling member 18 , the external evaporator 12 is further connected to the inlet of the compressor 11 , and the second throttling member 18 is arranged between the condenser 13 and the built-in evaporator 14 .

[0059] Figure 1 In the embodiment, the external evaporator 12 and the built-in evaporator 14 are arranged in series, that is, the low-temperature and low-pressure refrigerant vapor after throttling from the first throttle member 15 enters the external evaporator 12 and the built-in evaporator 14 in sequence; and this embodiment further connects the external evaporator 12 with the inlet of the compressor 11, and arranges a second throttle member 18 between the condenser 13 and the built-in evaporator 14, which can realize the parallel arrangement of the external evaporator 12 and the built-in evaporator 14, that is, part of the low-temperature and low-pressure refrigerant vapor after throttling enters the external evaporator 12, and part enters the built-in evaporator 14.

[0060] This embodiment further connects the external evaporator 12 to the inlet of the compressor 11, and sets a second throttling device 18 between the condenser 13 and the built-in evaporator 14, so that the low-temperature and low-pressure refrigerant vapor after throttling partially enters the external evaporator 12 and partially enters the built-in evaporator 14. During the heating stage of the dryer, the external evaporator 12 can absorb heat from the outside, so that the temperature in the drying room rises rapidly, and during the temperature stabilization stage of the dryer, the low temperature of the drying room can be maintained.

[0061] Optionally, the second throttling member 18 is disposed in the heat exchange cavity to simplify the connection structure between the second throttling member 18 and the condenser 13 and the built-in evaporator 14 and to shorten the length of the fifth pipeline 25 .

[0062] Optionally, the drying device of this embodiment further includes a first pipeline 21, a second pipeline 22, a third pipeline 23, a fourth pipeline 24, a fifth pipeline 25 and a sixth pipeline 26, wherein the second pipeline 22 includes a first branch pipe 221 and a second branch pipe 222, and the fourth pipeline 24 includes a third branch pipe 241 and a fourth branch pipe 242; one end of the first pipeline 21 is connected to the outlet of the compressor 11, and the other end of the first pipeline 21 is connected to the condenser 13; one end of the first branch pipe 221 is connected to the condenser 13, and the other end of the first branch pipe 221 is connected to the second branch pipe 221, respectively. One end of the branch pipe 222 is connected to one end of the fifth pipeline 25, and the external evaporator 12 is respectively connected to the other end of the second branch pipe 222 and one end of the sixth pipeline; the built-in evaporator 14 is respectively connected to the other end of the fifth pipeline 25 and one end of the third branch pipe 241, and the other end of the third branch pipe 241 is respectively connected to one end of the fourth branch pipe 242 and the other end of the sixth pipeline 26, and the other end of the fourth branch pipe 242 is connected to the inlet of the compressor 11; the first throttling device 15 is arranged on the second branch pipe 222, and the second throttling device 18 is arranged on the fifth pipeline 25.

[0063] Optionally, the drying equipment of this embodiment also includes a first interface part and a second interface part, and the first interface part and the second interface part are each provided with three ports; the three ports of the first interface part are respectively connected to the other end of the first branch pipe 221, one end of the second branch pipe 222 and one end of the fifth pipeline 25, so as to connect and communicate the first branch pipe 221, the second branch pipe 222 and the fifth pipeline 25; the three ports of the second interface part are respectively connected to one end of the third branch pipe 241, one end of the fourth branch pipe 242 and the other end of the sixth pipeline 26, so as to connect and communicate the third branch pipe 241, the fourth branch pipe 242 and the sixth pipeline 26.

[0064] Optionally, the first interface member and the second interface member may include a diverter valve. The controller of the drying device may switch whether the fifth pipeline 25 and the sixth pipeline 26 are connected based on actual needs to realize a series-parallel connection structure between the external evaporator 12 and the internal evaporator 14.

[0065] In another embodiment, if Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the third embodiment of the drying equipment of this application. Figure 2 The difference between the drying equipment of the embodiment is that the external evaporator 12 and the internal evaporator 14 share the first throttle member 15 .

[0066] Optionally, the drying device of this embodiment further includes a first pipeline 21, a second pipeline 22, a third pipeline 23, a fourth pipeline 24, a fifth pipeline 25 and a sixth pipeline 26, wherein the second pipeline 22 includes a first branch pipe 221 and a second branch pipe 222, and the fourth pipeline 24 includes a third branch pipe 241 and a fourth branch pipe 242; one end of the first pipeline 21 is connected to the outlet of the compressor 11, and the other end of the first pipeline 21 is connected to the condenser 13; one end of the first branch pipe 221 is connected to the condenser 13, and the first branch pipe 221 is connected to the outlet of the compressor 11. The other end of the pipe is connected to one end of the second branch pipe 222 and one end of the fifth pipe 25, respectively. The external evaporator 12 is connected to the other end of the second branch pipe 222 and one end of the sixth pipe, respectively. The built-in evaporator 14 is connected to the other end of the fifth pipe 25 and one end of the third branch pipe 241, respectively. The other end of the third branch pipe 241 is connected to one end of the fourth branch pipe 242 and the other end of the sixth pipe 26, respectively. The other end of the fourth branch pipe 242 is connected to the inlet of the compressor 11. The first throttling member 15 is provided on the first branch pipe 221.

[0067] In another embodiment, if Figure 4 As shown, Figure 4 This is a structural diagram of the fourth embodiment of the drying equipment of this application. Figure 1 The difference between the drying equipment of the embodiment is that: the heat pump unit 01 is not provided with a first throttling device 15, the heat pump unit 01 is provided with a second throttling device 18, and the second throttling device 18 is provided between the built-in evaporator 14 and the condenser 13, and the external evaporator 12 is respectively connected to the inlet of the built-in evaporator 14 and the compressor 11, that is, the low-temperature and low-pressure refrigerant vapor after throttling first passes through the built-in evaporator 14 and then passes through the external evaporator 12.

[0068] In this embodiment, the throttled low-temperature and low-pressure refrigerant vapor first passes through the built-in evaporator 14 and then passes through the external evaporator 12. The external evaporator 12 can also absorb heat from the external environment during the heating stage of the drying equipment to serve as a heat regenerator for the built-in evaporator 14 to quickly increase the temperature in the drying chamber 40.

[0069] In another embodiment, if Figure 5 and Figure 6 As shown, Figure 5 This is a structural diagram of the fifth embodiment of the drying equipment of the present application; Figure 6 yes Figure 5Schematic diagram of the exploded structure of a drying device according to an embodiment. The drying device according to this embodiment includes: a compressor 11, an external evaporator 12, a condenser 13, an internal evaporator 14, a first throttle member, an air duct housing 16, a first fan 17, and a drying chamber 40. The condenser 13 is connected to the outlet of the compressor 11, the condenser 13 is connected to the external evaporator 12, and the internal evaporator 14 is connected to the inlets of the external evaporator 12 and the compressor 11, respectively. The first throttle member is disposed between the condenser 13 and the external evaporator 12. The air duct housing 16 forms a heat exchange chamber that communicates with the drying chamber 40. The first throttle member, condenser 13, and internal evaporator 14 are disposed within the heat exchange chamber, while the external evaporator 12 and compressor 11 are disposed outside the heat exchange chamber. The first fan 17 is positioned outside the heat exchange chamber and adjacent to the external evaporator 12, which is located between the first fan 17 and the compressor 11. The external evaporator 12 can exchange heat with the external environment of the drying chamber 40.

[0070] The operation stages of the drying equipment of this embodiment include a heating stage and a temperature stabilization stage. The first fan 17 is controlled to operate in the heating stage to promote heat exchange between the external evaporator 12 and the external environment. The first fan 17 is controlled to stop operating in the temperature stabilization stage to reduce heat exchange between the external evaporator 12 and the external environment.

[0071] In this embodiment, a first fan 17 is arranged near the external evaporator 12, and the heat exchange efficiency between the external evaporator 12 and the external environment can be controlled by controlling the working state of the first fan 17, so as to improve the heat exchange efficiency of the external evaporator 12, thereby improving the heating efficiency of the drying chamber 40; and the first fan 17 is arranged outside the heat exchange cavity, which can reduce the impact of the operation of the first fan 17 on the temperature in the drying chamber 40; and the first fan 17 is arranged on the side of the external evaporator 12 away from the compressor 11, which is convenient for the spatial layout among the three, and can reduce the impact of the first fan 17 on the compressor 11, and can enable the first fan 17 to form an air duct connecting the heat exchange space of the external evaporator 12 with the external environment, thereby realizing heat exchange between the heat exchange space and the external environment, thereby realizing heat exchange between the external evaporator 12 and the external space, thereby realizing the condensation effect of the external evaporator 12.

[0072] The external evaporator 12 is located at the air outlet side of the first fan 17 , and the air inlet side of the first fan 17 is communicated with the external environment of the drying equipment.

[0073] In other embodiments, the external evaporator is located on the air inlet side of the first fan, and the air outlet side of the first fan is connected to the external environment of the drying equipment.

[0074] Optionally, the open end of the air duct housing 16 is sealed with the drying chamber 40 to improve the heat exchange efficiency between the heat exchange cavity formed by the air duct housing 16 and the drying chamber 40 .

[0075] In one application scenario, during the heating stage of the dryer, the first fan 17 is controlled to operate to promote heat exchange between the external evaporator 12 and the external environment; the high-temperature and high-pressure refrigerant vapor output by the compressor 11 is transported to the condenser 13, and the condenser 13 condenses the high-temperature and high-pressure refrigerant vapor to form a high-pressure supercooled liquid, and quickly provides heat to the drying chamber 40 of the dryer. The high-pressure supercooled liquid coming out of the condenser 13 is throttled by the first throttle member 15 to become a low-temperature and low-pressure refrigerant vapor, and then transported to the external evaporator 12. The external evaporator 12 absorbs heat from the external environment to quickly provide heat to the drying chamber 40 of the dryer, so that the drying chamber 40 is quickly heated up, which can shorten the drying time; the internal evaporator 14 absorbs heat from the moist heat medium in the drying chamber 40, so that the low-temperature and low-pressure refrigerant vapor is converted into low-temperature and low-pressure refrigerant vapor, which is transported to the compressor 11, and the water vapor in the moist heat medium in the drying chamber 40 is condensed into condensed water and discharged.

[0076] In one application scenario, when the drying temperature in the drying chamber 40 reaches a preset temperature, the dryer enters a steady temperature stage, and the first fan 17 is controlled not to work, so that the external evaporator 12 does not exchange heat with the external environment, or the amount of heat exchange is very small and can be ignored; the high-temperature and high-pressure refrigerant vapor output by the compressor 11 is transported to the condenser 13, and the condenser 13 dissipates the heat in the high-pressure and high-temperature vapor into the drying chamber 40; the high-pressure supercooled liquid coming out of the condenser 13 is throttled by the first throttling device 15 to become a low-temperature and low-pressure refrigerant vapor, and then transported to the external evaporator 12 and then to the built-in evaporator 14. The built-in evaporator 14 absorbs the heat of the moist heat medium in the drying chamber 40, so that the low-temperature and low-pressure refrigerant vapor becomes a low-temperature and low-pressure refrigerant vapor, and the low-temperature and low-pressure refrigerant vapor is transported to the compressor 11, and the water vapor in the moist heat medium in the drying chamber 40 is condensed into condensed water and discharged.

[0077] Optionally, the condenser 13 and the built-in evaporator 14 of this embodiment are arranged along the first horizontal direction X in the heat exchange cavity.

[0078] In this embodiment, the condenser 13 and the built-in evaporator 14 are arranged in a horizontal direction. Even if the two are located on the same horizontal plane, their layout can be optimized, the structure of the heat exchange cavity and the refrigerant flow channel where the two are located can be simplified, and costs can be saved and working reliability can be improved.

[0079] The air duct housing 16 also forms an installation area that is isolated from the heat exchange chamber and located outside the heat exchange chamber. The first fan 17, the external evaporator 12, and the compressor 11 are arranged in the installation area of the air duct housing 16 along the first horizontal direction X, and the heat exchange chamber and the installation area are arranged along the second horizontal direction Y, which is perpendicular to the first horizontal direction X.

[0080] The row where the condenser 13 and the built-in evaporator 14 are located and the row where the external evaporator 12 , the compressor 11 and the first fan 17 are located are arranged along the second horizontal direction Y.

[0081] In this embodiment, the row where the condenser 13 and the built-in evaporator 14 are located and the row where the external evaporator 12, the compressor 11 and the first fan 17 are located are arranged along the second horizontal direction Y that is perpendicular to the first horizontal direction X. This can optimize the structural layout so that the arrangement structure of the above components is not too large in the first horizontal direction X or the second horizontal direction Y, and can better match the size of the drying chamber 40, thereby simplifying the process and saving costs.

[0082] In other embodiments, the arrangement of the condenser and the built-in evaporator may form a certain angle with the horizontal plane, for example, the angle is also less than or equal to 10°. And / or the arrangement of the external evaporator, the compressor, and the first fan may form a certain angle with the horizontal plane, non-perpendicular to the arrangement of the condenser and the built-in evaporator. Specific adjustments can be made based on specific needs.

[0083] Optionally, the heat exchange chamber of the air duct housing 16 of this embodiment includes a first sub-chamber 161 and a second sub-chamber 162 arranged and connected along the first horizontal direction X, the built-in evaporator 14 is arranged in the second sub-chamber 162, and the condenser 13 is arranged in the first sub-chamber 161. The side wall of the first sub-chamber 161 facing away from the second sub-chamber 162 is provided with a ventilation hole, and the ventilation hole is connected to the drying chamber 40; an installation area is also formed on the air duct housing 16, which is located outside the heat exchange chamber and is isolated from the heat exchange chamber. The installation area is arranged along the second horizontal direction Y with the heat exchange chamber, and the compressor 11, the external evaporator 12 and the first fan 17 are arranged on the installation area along the first horizontal direction X.

[0084] In this embodiment, the compressor 11, the external evaporator 12, the first fan 17, the condenser 13, and the internal evaporator 14 are integrated in the air duct housing 16, which can optimize the structural layout, improve the structural stability, and reduce the structural volume.

[0085] Optionally, the blowing direction of the first fan 17 is arranged parallel to the first horizontal direction X, and at least the air outlet of the first fan 17 is connected to the external environment.

[0086] Optionally, the air duct housing 16 can form an installation cavity on the installation area, and the compressor 11 and the external evaporator 12 are both arranged in the installation cavity. The side wall of the installation cavity close to the external evaporator 12 and facing away from the external compressor 11 is provided with an air outlet connected to the external environment and the installation cavity; the first fan 17 is arranged outside the installation cavity, and its air outlet is connected to the air outlet of the installation cavity.

[0087] In other embodiments, the air duct housing can form an installation cavity on the installation area, and the compressor, external evaporator and first fan are all arranged in the installation cavity. The side wall of the installation cavity close to the first fan facing away from the external evaporator is provided with an air outlet connected to the external environment and the installation cavity.

[0088] Optionally, the heat exchange cavity is provided with an air outlet connected to the drying chamber 40 and an air inlet arranged opposite to the air outlet; the distance between the external evaporator 12 and the air inlet is smaller than the distance between the external evaporator 12 and the air outlet.

[0089] Through the above method, the probability of the external evaporator 12 dissipating heat to the air outlet, that is, the air inlet of the drying chamber 40, can be reduced, thereby reducing the risk of the drying chamber 40 being overheated; and the probability of the external evaporator 12 dissipating heat to the air inlet can be increased, thereby preheating the air entering the heat exchange chamber, increasing the heat of the heat exchange chamber, and improving the heat exchange efficiency.

[0090] Similar improvements can be made to the other embodiments above, which will not be described in detail here.

[0091] Similar improvements can also be made to the other embodiments above.

[0092] In another embodiment, the drying equipment of this embodiment also includes: a temperature sensor and a controller, the temperature sensor is used to obtain the temperature in the drying room; the controller is respectively connected to the first fan and the temperature sensor, the controller determines the operating stage of the drying equipment based on the temperature, and controls the first fan to work in the heating stage and not work in the temperature stabilization stage.

[0093] The dryer starts working and enters the heating stage. The first fan starts working to allow the external evaporator to absorb heat from the external environment and accelerate the temperature rise in the drying room. The temperature sensor obtains the real-time temperature in the drying room in real time during the entire working stage of the dryer and uploads the real-time temperature to the controller. The controller compares the real-time temperature with the preset temperature. In response to the real-time temperature being greater than or equal to the preset temperature, the controller determines that the dryer switches from the heating stage to the temperature stabilization stage. At this time, the controller controls the first fan to stop working, and the condenser dissipates heat to the drying room. Since the power of the drying equipment is not increased and an additional heating source is not used, the temperature in the drying room will not be too high, and low-temperature drying can be achieved.

[0094] Similar improvements can be made to the other embodiments above, which will not be described in detail here.

[0095] Optionally, the drying equipment of this embodiment further includes: a partition 20, which is arranged between the built-in evaporator 14 and the bottom wall of the heat exchange chamber, and a water accumulation portion or drainage hole is also provided on the bottom wall, and the water accumulation portion or drainage hole is located on the side of the partition 20 away from the built-in evaporator 14.

[0096] The partition plate 20 may be disposed directly below or to the side of the built-in evaporator 14 .

[0097] When the built-in evaporator 14 is working, the low-temperature and low-pressure refrigerant wet vapor boils under isobaric conditions in the built-in evaporator 14, absorbs the heat of the wet and hot medium in the drying chamber 40, and turns into low-temperature and low-pressure refrigerant vapor. The water vapor in the wet and hot medium is condensed and adheres to the outer surface of the built-in evaporator 14. The condensed water is discharged out of the dryer through the water accumulation part or drainage hole on the bottom wall or is recycled by the dryer.

[0098] In this embodiment, the built-in evaporator 14 is separated from the bottom wall of the heat exchange chamber by the partition 20 , which can facilitate the discharge of condensed water and reduce the impact of condensed water on the built-in evaporator 14 .

[0099] Optionally, a water retaining strip is provided on the bottom wall of the heat exchange chamber to separate and connect the first sub-chamber 161 and the second sub-chamber 162 , thereby reducing the impact of condensed water on the condenser 13 .

[0100] Of course, a water-isolating and drainage structure may also be provided for the external evaporator 12 .

[0101] Optionally, the drying equipment of this embodiment also includes an air duct mechanism 31 and a second fan 30. The air duct mechanism 31 is arranged at the connection between the heat exchange chamber and the drying chamber 40, and the air duct of the air duct mechanism 31 is respectively connected to the heat exchange chamber and the drying chamber 40; the second fan 30 is arranged in the air duct.

[0102] This embodiment utilizes the air duct of the air duct mechanism 31 to achieve communication between the heat exchange chamber and the drying chamber 40, thereby adjusting the temperature and humidity of the air in the drying chamber 40, thereby achieving a drying effect on clothes, etc. This embodiment utilizes the second fan 30 in the air duct to accelerate the air flow rate between the heat exchange chamber and the drying chamber 40, thereby improving drying efficiency.

[0103] Optionally, the air duct mechanism 31 of this embodiment forms a spiral air duct, which can improve the air guiding efficiency. The air duct mechanism 31 is a volute in which the second fan 30 is arranged.

[0104] Similar improvements can be made to the other embodiments above, which will not be described in detail here.

[0105] Of course, in other embodiments, such as Figure 7 and Figure 8 As mentioned above, the air duct mechanism 31 can also be provided with a disc-shaped air duct. 。 The air duct mechanism 31 is a disc-shaped housing in which the second fan 30 is installed.

[0106] Similar improvements can be made to the other embodiments above, which will not be described in detail here.

[0107] Optionally, the power range of the compressor in the embodiment of the present application is 250W to 2300W, which can maintain the drying power of the drying equipment and shorten the drying time; and the power range of the compressor is wider, which can improve the flexibility of drying options.

[0108] Optionally, the power range of the compressor is 300W to 2200W, for example, 300W, 400W, 500W, 600W, 700W, 800W, 900W, 1000W, 1100W, 1200W, 1300W, 1400W, 1500W, 1600W, 1700W, 1800W, 1900W, 2000W, 2100W, 2200W, etc. For example, when the user selects the quick drying mode, the maximum power of the compressor can operate at 2200W.

[0109] Optionally, the temperature range in the drying chamber in the embodiment of the present application is 45°C to 80°C, which can achieve low-temperature drying and improve the problem of damage to clothes caused by high-temperature drying.

[0110] Optionally, the temperature range may be 50°C to 75°C, such as 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, etc.

[0111] In another embodiment, the drying equipment also includes a heating element, which is arranged in a drying chamber corresponding to the drying equipment. The operation stages of the drying equipment include a heating stage and a temperature stabilization stage. The heating element works in the heating stage to quickly increase the temperature in the drying chamber and shorten the drying time; the heating element stops working in the temperature stabilization stage to avoid the temperature in the drying chamber being too high.

[0112] Of course, the heating element can also be arranged in the heat exchange cavity of the air duct housing for accommodating the condenser and the built-in evaporator.

[0113] The heating element is also connected to the controller of the drying equipment. The controller controls the heating element to work in the temperature rising stage and stop working in the temperature stabilizing stage.

[0114] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A drying device, characterized in that: The drying equipment comprises: A drying chamber, used for accommodating objects to be dried; an air duct housing connected to the drying chamber; a heat pump unit connected to the air duct housing and having a refrigerant circulation channel; an external evaporator connected to the air duct housing, capable of exchanging heat with the external environment of the drying chamber, and connected to the refrigerant circulation channel; The operation phase of the drying equipment includes a temperature rising phase, and during the temperature rising phase, the external evaporator is controlled to operate.

2. The drying equipment according to claim 1, characterized in that The air duct housing also forms a heat exchange cavity connected to the drying chamber. The heat pump unit includes a compressor, a condenser and a built-in evaporator. The condenser and the built-in evaporator are arranged in the heat exchange cavity, and the external evaporator and the compressor are arranged outside the heat exchange cavity.

3. The drying equipment according to claim 2, characterized in that: The operation stage also includes a temperature stabilization stage, and the drying equipment further includes: a first fan located outside the heat exchange chamber, and the external evaporator located between the first fan and the compressor; Among them, the first fan is controlled to operate in the heating stage to promote heat exchange between the external evaporator and the external environment; the first fan is controlled to stop operating in the temperature stabilization stage to reduce heat exchange between the external evaporator and the external environment.

4. The drying equipment according to claim 2, characterized in that: The condenser is connected to the outlet of the compressor; the heat pump unit also includes a first throttling device, the external evaporator is connected to the condenser, and the first throttling device is arranged between the external evaporator and the condenser; the built-in evaporator is respectively connected to the external evaporator and the inlet of the compressor.

5. The drying equipment according to claim 4, characterized in that: The heat pump unit further includes a second throttling member, the external evaporator is further connected to the inlet of the compressor, and the second throttling member is arranged between the condenser and the built-in evaporator.

6. The drying equipment according to claim 2, characterized in that: The heat pump unit further includes a second throttling member, which is arranged between the built-in evaporator and the condenser; the external evaporator is connected to the built-in evaporator and the inlet of the compressor respectively.

7. The drying equipment according to claim 2, characterized in that: The condenser and the built-in evaporator are arranged in the heat exchange cavity of the air duct housing along a first horizontal direction.

8. The drying equipment according to claim 2, characterized in that: The drying equipment also includes: A partition is arranged between the built-in evaporator and the bottom wall of the heat exchange chamber, and the bottom wall is also provided with a water accumulation portion or a drainage hole.

9. The drying equipment according to claim 2, characterized in that: The drying equipment also includes: An air duct mechanism is provided at the connection between the heat exchange chamber and the drying chamber, and its air duct is communicated with the heat exchange chamber and the drying chamber respectively; The second fan is arranged in the air duct.

10. The drying equipment according to claim 2, characterized in that: The heat exchange chamber is provided with an air outlet communicating with the drying chamber and an air inlet arranged opposite to the air outlet; The distance between the external evaporator and the air inlet is smaller than the distance between the external evaporator and the air outlet.

Images