A dehumidifier

Abstract

The utility model discloses a dehumidifier, including compressor, condenser, evaporimeter, first throttings, air supplementing pipeline, the compressor includes exhaust port, suction port, the condenser includes first end, second end, the first end with exhaust port is connected through the pipeline, the evaporimeter includes third end, fourth end, the fourth end with suction port is connected through the pipeline, the second end is connected with third end through first throttings, air supplementing pipeline includes first pipeline controllable switch for realizing the intercommunication or cut -off of air supplementing pipeline, two ends of air supplementing pipeline are connected with exhaust port, suction port respectively, the utility model discloses through setting controllable passway of the intercommunication of compressor's exhaust port and suction port, realize by compressor's exhaust port direct air supplementing for compressor's suction port, improve the suction pressure and evaporation temperature of compressor, reduce compressor failure rate and delay the frost speed of evaporimeter, improve dehumidification efficiency.

Description

Technical Field

[0001] This utility model relates to the field of dehumidifier technology, and specifically to a dehumidifier. Background Technology

[0002] Dehumidifiers are being used in an increasingly wide range of applications. In some high-latitude regions, dehumidifiers often operate under medium to low temperature conditions. Because the dew point temperature of the air under medium to low temperature conditions is close to or even below zero, the compressor's return gas pressure often remains below its designed return gas pressure range for extended periods. This prevents the compressor's lubricating oil from effectively returning, increasing the probability of compressor malfunctions.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] To address the problem mentioned in the background art of compressor return pressure being too low for extended periods during operation in low- and medium-temperature environments, resulting in ineffective lubricant return, this utility model proposes a dehumidifier. By setting up a controllable passage connecting the compressor's exhaust port and intake port, air can be directly supplied from the compressor's exhaust port to the compressor's intake port, thereby increasing the compressor's intake pressure and evaporation temperature, reducing the compressor's failure rate, slowing down the evaporator's frosting speed, and improving dehumidification efficiency.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: A dehumidifier includes a compressor, a condenser, an evaporator, a first throttling element, and a gas supply line; The compressor includes an exhaust port and an intake port; The condenser includes a first end and a second end; the first end is connected to the exhaust port via a pipeline. The evaporator includes a third end and a fourth end; the fourth end is connected to the air intake via a pipeline. The second end is connected to the third end through the first throttling device; The air supply pipeline includes a first pipeline controllable switch for connecting or disconnecting the air supply pipeline; the two ends of the air supply pipeline are respectively connected to the exhaust port and the intake port.

[0006] This utility model of dehumidifier, by setting up a controllable pipeline connecting the exhaust port and the intake port of the compressor, enables controllable supply of air from the compressor's exhaust port to the compressor's intake port and stops the supply of air. This keeps the compressor's intake pressure within a set range and increases the evaporation temperature, reduces the compressor's failure rate, slows down the evaporator's frosting speed, increases the dehumidification operation time of the dehumidifier, and improves dehumidification efficiency.

[0007] In some specific embodiments, the air supply line further includes a second throttling device; one end of the first pipeline controllable switch is connected to the exhaust port through the pipeline, and the other end is connected to one end of the second throttling device; the other end of the second throttling device is connected to the intake port.

[0008] The dehumidifier in this embodiment reduces the flow rate in the air supply line by installing a second throttling element, thereby improving the accuracy and precision of air supply adjustment achieved by controlling the opening and closing of the controllable switch in the first line. Furthermore, by placing the controllable switch in the first line near the exhaust port, the impact on the second throttling element is reduced when the switch is closed, thus lessening wear and extending its lifespan.

[0009] In some specific embodiments, the air supply line further includes a second throttling device; one end of the first pipeline controllable switch is connected to the first air intake port through the pipeline, and the other end is connected to one end of the second throttling device; the other end of the second throttling device is connected to the exhaust port.

[0010] The dehumidifier in this embodiment reduces the flow rate in the air supply line by installing a second throttling device, thereby improving the accuracy and precision of air supply adjustment achieved by controlling the opening and closing of the controllable switch in the first line. Furthermore, by placing the controllable switch in the first line near the air intake, the impact on the switch is reduced by the obstruction or throttling effect of the second throttling device, thus reducing wear and extending the lifespan of the controllable switch.

[0011] In some specific embodiments, the gas supply line further includes a one-way valve, which is located between the second throttling element and the first pipeline controllable switch, and is connected in series with the second throttling element and the first pipeline controllable switch through the pipeline.

[0012] The dehumidifier in this embodiment prevents refrigerant from flowing back from the intake port into the exhaust port after the machine stops by installing a one-way valve on the air supply line, thereby preventing liquid slugging that could damage the compressor when it restarts and extending the compressor's lifespan.

[0013] In some specific embodiments, the air supply line also includes a one-way valve, which is connected in series with the second throttling device and the first controllable switch of the line through a pipeline, and one end of the valve is connected to the air intake through a pipeline.

[0014] The dehumidifier in this embodiment prevents refrigerant from flowing back from the suction port to the exhaust port after shutdown by installing a one-way valve on the air supply line. This prevents liquid slugging from damaging the compressor when it restarts and extends the compressor's lifespan. In addition, the one-way valve is located near the suction port to prevent backflow of refrigerant from impacting the second throttling element and the controllable switch of the first pipeline, reducing their wear and extending their lifespan.

[0015] In some specific embodiments, a pressure detection unit is also included, which is disposed on the pipeline near the air intake for detecting low pressure.

[0016] The dehumidifier in this embodiment detects low pressure by installing a pressure detection unit on the low-pressure pipeline near the air intake. The first pipeline controllable switch can connect or disconnect according to the detected low pressure, thereby realizing low-pressure air replenishment, stopping low-pressure air replenishment, adjusting the air replenishment amount, or adjusting the air replenishment speed, thus improving the stability and reliability of the compressor operation.

[0017] In some specific embodiments, the first throttling element is a capillary tube or an orifice plate throttling element; the second throttling element is a capillary tube or an orifice plate throttling element.

[0018] The dehumidifier in this embodiment reduces the cost of the dehumidifier by using capillary tubes or orifice plates as the first and second throttling elements.

[0019] In some specific embodiments, it also includes a first exhaust pipe and a second exhaust pipe; The first exhaust pipe includes a second pipe controllable switch for connecting or disconnecting the first exhaust pipe; the two ends of the first exhaust pipe are respectively connected to the first end and the exhaust port; The second exhaust pipe includes a third pipe controllable switch for connecting or disconnecting the second exhaust pipe; the two ends of the second exhaust pipe are respectively connected to the third end and the exhaust port; the fourth end is connected to the intake port.

[0020] The dehumidifier in this embodiment achieves defrosting by directly connecting the compressor's exhaust port to the condenser and evaporator without stopping the machine when the evaporator is frosted, and by switching to dehumidification by connecting the condenser to the compressor's exhaust port without stopping the machine after defrosting, thus improving both defrosting and dehumidification efficiency.

[0021] In some specific embodiments, the second pipeline controllable switch and the third pipeline controllable switch are shared as a three-way valve, which includes a fifth end, a sixth end, and a seventh end; The fifth end, the sixth end, and the seventh end are respectively connected to the exhaust port, the first end, and the third end via pipes; the fifth end, the sixth end, and the pipes connected to the exhaust port and the first end form the first exhaust pipe; the fifth end, the seventh end, and the pipes connected to the exhaust port and the third end form the second exhaust pipe.

[0022] The dehumidifier in this embodiment uses a three-way valve to control the selective connection of the first and second exhaust pipes, preventing the first and second exhaust pipes from being connected or cut off simultaneously, thus improving the safety and reliability of the dehumidifier's operation.

[0023] In some specific embodiments, a first temperature detection unit and a second temperature detection unit are also included, which are respectively disposed on the evaporator and at the return air vent, for detecting the temperature of the evaporator and the ambient temperature.

[0024] The dehumidifier in this embodiment obtains the evaporation temperature and ambient temperature by setting a first temperature detection unit on the evaporator and a second temperature detection unit at the return air vent, respectively. This allows the three-way valve to control the connection between the fifth and sixth terminals or the fifth and seventh terminals based on the evaporation temperature and / or ambient temperature, thereby improving the accuracy of the defrosting entry and exit timing.

[0025] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 2 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 3 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 4 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 5 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 6 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 7 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 8 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 9 This is a schematic diagram of the system structure of the dehumidifier according to an embodiment; Figure 10This is a schematic diagram of the system structure of a dehumidifier according to an embodiment.

[0028] Figure label, 1. Compressor; 11. Exhaust port; 12. Inlet port; 2. Condenser; 21. First end; 22. Second end; 3. Evaporator; 31. Third end; 32. Fourth end; 4. First throttling element; 51. First exhaust pipe; 52. Second exhaust pipe; 53. Controllable switch for the second pipe; 54. Controllable switch for the third pipe; 55. Three-way valve; 551. Fifth end; 552. Sixth end; 553. Seventh end; 6. Pressure detection unit; 7. Fan; 81. First temperature detection unit; 82. Second temperature detection unit; 9. Make-up air pipe; 91. Controllable switch for the first pipe; 92. Second throttling element; 93. Check valve. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0035] Dehumidifiers operate by using a compressor, condenser, throttling element, and evaporator to perform a refrigeration cycle. This cycle involves a series of processes—compression, condensation, expansion, and evaporation—to dehumidify the air in an indoor space.

[0036] The refrigeration cycle is as follows: a low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0037] The throttling element causes the high-temperature, high-pressure liquid refrigerant that condenses in the condenser to expand into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant that has expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator can be made a low-temperature unit by utilizing the latent heat of refrigerant evaporation, causing water vapor in the air passing through it to condense.

[0038] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The dehumidifier of this utility model includes a compressor 1, a condenser 2, an evaporator 3, a first throttling element 4, and a gas supply pipeline 9.

[0039] The compressor 1 includes an exhaust port 11 and an intake port 12; the condenser 2 includes a first end 21 and a second end 22; the first end 21 is connected to the exhaust port 11 through a pipeline.

[0040] The evaporator 3 includes a third end 31 and a fourth end 32; the second end 22 is connected to the third end 31 through the first throttling element 4; the fourth end 32 is connected to the suction port 12.

[0041] The gas replenishment pipeline 9 includes a first pipeline controllable switch 91, which together with the pipeline forms the gas replenishment pipeline 9. Its two ends are connected to the exhaust port 11 and the intake port 12, respectively. The first pipeline controllable switch 91 realizes the connection and cut-off of the gas replenishment pipeline 9, thereby realizing the replenishment of the high-pressure and high-temperature gaseous refrigerant discharged from the exhaust port 11 to the intake port 12 or stopping the gas replenishment.

[0042] The dehumidifier of this utility model, by setting up a controllable pipeline connecting the exhaust port 11 and the intake port 12 of the compressor 1, can controllably supply air directly from the exhaust port 11 of the compressor 1 to the intake port 12 of the compressor 1 and stop supplying air, so that the intake pressure of the compressor 1 is maintained within the set range and the evaporation temperature is increased, thereby reducing the failure rate of the compressor 1 and delaying the frosting speed of the evaporator 3, increasing the dehumidification operation time of the dehumidifier, and improving the dehumidification efficiency.

[0043] Of course, the first pipeline controllable switch 91 can control the amount of supplementary air by controlling the duration of its connection and disconnection or the switching frequency and duty cycle, so as to stabilize the suction pressure, i.e. the low pressure, and reduce the failure rate of compressor 1.

[0044] The specific structure and principle of the dehumidifier of this utility model will be described in detail below through specific embodiments.

[0045] In some specific embodiments, refer to Figure 2 The air supply line 9 also includes a second throttling element 92; one end of the first pipeline controllable switch 91 is connected to the exhaust port 11 through the pipeline, and the other end is connected to one end of the second throttling element 92; the other end of the second throttling element 92 is connected to the intake port 12.

[0046] That is, the air supply line 9 also includes a second throttling element 92, which is connected in series with the first pipeline controllable switch 91 through the pipeline; the end of the air supply line 9 near the first pipeline controllable switch 91 is connected to the exhaust port 11, and the end near the second throttling element 92 is connected to the intake port 12.

[0047] The dehumidifier in this embodiment reduces the flow rate of the air supply line 9 by setting a second throttling device 92 on the air supply line 9, thereby improving the adjustment accuracy and precision of the air supply volume achieved by controlling the connection and disconnection of the controllable switch 91 of the first line.

[0048] In addition, the first pipeline controllable switch 91 is set at one end near the exhaust port 11. When the first pipeline switch is turned off, the impact on the second throttling element 92 is reduced, the wear on the second throttling element 92 is weakened, and the service life of the second throttling element 92 is extended.

[0049] In some specific embodiments, refer to Figure 3 The air supply line 9 also includes a second throttling element 92, which is connected in series with the first pipeline controllable switch 91 through a pipeline; the end of the air supply line 9 near the first pipeline controllable switch 91 is connected to the air intake port 12, and the end near the second throttling element 92 is connected to the exhaust port 11.

[0050] That is, one end of the first pipeline controllable switch 91 is connected to the intake port 12 through a pipeline, and the other end is connected to the second throttling device 92; the other end of the second throttling device 92 is connected to the exhaust port 11.

[0051] The dehumidifier in this embodiment reduces the flow rate of the air supply line 9 by setting a second throttling device 92 on the air supply line 9, thereby improving the adjustment accuracy and precision of the air supply volume achieved by controlling the connection and disconnection of the controllable switch 91 of the first line.

[0052] In addition, the first pipeline controllable switch 91 is set at one end near the air intake 12. The impact on the first pipeline switch is reduced by the obstruction or throttling of the second throttling element 92, thereby reducing the wear on the first pipeline controllable switch 91 and extending its service life.

[0053] In some specific embodiments, refer to Figure 4 , Figure 5 The air supply line 9 also includes a one-way valve 93, which is located between the second throttling element 92 and the first pipeline controllable switch 91, and is connected in series with the second throttling element 92 and the first pipeline controllable switch 91 through the pipeline.

[0054] That is, the air supply line 9 also includes a one-way valve 93; one end of the first pipeline controllable switch 91 is connected to the exhaust port 11, and the other end is connected to one end of the one-way valve 93; the other end of the one-way valve 93 is connected to one end of the second throttling element 92; the other end of the second throttling element 92 is connected to the intake port 12.

[0055] Alternatively, the air supply line 9 may also include a one-way valve 93; one end of the second throttling element 92 is connected to the exhaust port 11, and the other end is connected to one end of the one-way valve 93; the other end of the one-way valve 93 is connected to one end of the first pipeline controllable switch 91; the other end of the first pipeline controllable switch 91 is connected to the air intake port 12.

[0056] The dehumidifier in this embodiment prevents refrigerant from flowing back from the intake port 12 into the exhaust port 11 after the machine stops by installing a one-way valve 93 on the air supply line 9, thereby preventing liquid slugging from damaging the compressor 1 when it restarts and extending the life of the compressor 1.

[0057] In some specific embodiments, refer to Figure 6 The air supply line 9 also includes a one-way valve 93, which is connected in series with the second throttling element 92 and the first pipeline controllable switch 91 through a pipeline, and one end is connected to the air intake port 12 through a pipeline.

[0058] That is, the air supply line 9 also includes a one-way valve 93; one end of the first pipeline controllable switch 91 is connected to the exhaust port 11, and the other end is connected to one end of the second throttling element 92; the other end of the second throttling element 92 is connected to one end of the one-way valve 93; the other end of the one-way valve 93 is connected to the intake port 12.

[0059] Alternatively, the air supply line 9 may also include a one-way valve 93; one end of the second throttling element 92 is connected to the exhaust port 11, and the other end is connected to one end of the first pipeline controllable switch 91; the other end of the first pipeline controllable switch 91 is connected to one end of the one-way valve 93; and the other end of the one-way valve 93 is connected to the intake port 12.

[0060] In this embodiment, the dehumidifier prevents refrigerant from flowing back from the intake port 12 into the exhaust port 11 after shutdown by installing a one-way valve 93 on the air supply line 9. This prevents liquid slugging from damaging the compressor 1 when it restarts and extends the life of the compressor 1. In addition, the one-way valve 93 is located at the end near the intake port 12 to prevent the backflowing refrigerant from impacting the second throttling element 92 and the first pipeline controllable switch 91, reducing their wear and extending their life.

[0061] In some specific embodiments, refer to Figure 7 , Figure 8 , Figure 9 , Figure 10 The dehumidifier also includes a pressure detection unit 6, which is located on the pipe near the air intake 12 and is used to detect low pressure.

[0062] In this embodiment, the dehumidifier detects low pressure by installing a pressure detection unit 6 on the low-pressure pipeline near the air intake 12. The first pipeline controllable switch 91 can connect or cut off the low pressure according to the detected low pressure, thereby realizing low-pressure air replenishment or stopping low-pressure air replenishment, or adjusting the air replenishment amount or adjusting the air replenishment speed, thus improving the stability and reliability of the compressor 1.

[0063] In some specific embodiments, refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The first throttling element 4 is a capillary tube or orifice plate throttling element; the second throttling element 92 is a capillary tube or orifice plate throttling element.

[0064] The dehumidifier in this embodiment reduces the cost of the dehumidifier by using capillary tubes or orifice plates for the first throttling element 4 and the second throttling element 92.

[0065] In some specific embodiments, the first pipeline controllable switch 91 is a solenoid valve.

[0066] In some specific embodiments, refer to Figure 8 , Figure 9 , Figure 10 The dehumidifier also includes a first exhaust pipe 51 and a second exhaust pipe 52.

[0067] The first exhaust pipe 51 includes a second pipe controllable switch 53, which is used to connect or disconnect the first exhaust pipe 51. The two ends of the first exhaust pipe 51 are respectively connected to the first end 21 and the exhaust port 11. That is, one end of the second pipe controllable switch 53 is connected to the first end 21 through the pipe, and the other end is connected to the exhaust port 11 through the pipe.

[0068] The second exhaust pipe 52 includes a third pipe controllable switch 54, which is used to connect or disconnect the second exhaust pipe 52. The two ends of the second exhaust pipe 52 are respectively connected to the third end 31 and the exhaust port 11. That is, one end of the third pipe controllable switch 54 is connected to the third end 31 through a pipe, and the other end is connected to the exhaust port 11 through a pipe.

[0069] One end of the air supply line 9 is connected to the first end 21; of course, one end of the air supply line 9 can also be connected to the first exhaust line 51 or the exhaust port 11.

[0070] When the second pipeline controllable switch 53 is connected and the third pipeline controllable switch 54 is cut off, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 11 of the compressor 1 enters the condenser 2 through the first exhaust pipeline 51 and becomes high-pressure liquid refrigerant after exothermic condensation. The high-pressure liquid refrigerant is throttled by the first throttling device 4 to form low-pressure liquid refrigerant. The liquid refrigerant enters the evaporator 3 and evaporates and cools down in the evaporator 3 to become low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant returns to the compressor 1 through the suction port 12 for compression, which is a normal dehumidification cycle.

[0071] When the second pipeline controllable switch 53 is closed and the third pipeline controllable switch 54 is connected, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 11 of the compressor 1 enters the evaporator 3 through the second exhaust pipeline 52 for condensation and heat release, and then returns to the suction port 12 for recompression; the refrigerant returning to the suction port 12 can be made gaseous by setting the compressor 1 to a variable frequency compressor 1 and adjusting the frequency of the compressor 1.

[0072] The dehumidifier in this embodiment, by setting up a controllable passage connecting the compressor 1, condenser 2, and evaporator 3 through the first exhaust pipe 51 and the second exhaust pipe 52, can directly connect the compressor 1's exhaust port 11 for defrosting without stopping the machine when the evaporator 3 is frosted, and switch to dehumidification of the condenser 2 connected to the compressor 1's exhaust port 11 without stopping the machine when defrosting is completed, thereby improving defrosting efficiency and dehumidification efficiency.

[0073] In some specific embodiments, refer to Figure 9 The second pipeline controllable switch 53 and the third pipeline controllable switch 54 are solenoid valves.

[0074] In some specific embodiments, refer to Figure 8 , Figure 10 The second and third controllable switches share a three-way valve 55, which includes a fifth terminal 551, a sixth terminal 552, and a seventh terminal 553.

[0075] The fifth end 551, the sixth end 552, and the seventh end 553 are respectively connected to the exhaust port 11, the first end 21, and the third end 31 through pipes; the fifth end 551, the sixth end 552, and the pipes connected to the exhaust port 11 and the first end 21 form the first exhaust pipe 51; the fifth end 551, the seventh end 553, and the pipes connected to the exhaust port 11 and the third end 31 form the second exhaust pipe 52.

[0076] In this embodiment, the dehumidifier uses a three-way valve 55 to control the selective connection of the first exhaust pipe 51 and the second exhaust pipe 52, preventing the first exhaust pipe 51 and the second exhaust pipe 52 from being connected or cut off at the same time, thereby improving the safety and reliability of the dehumidifier's operation.

[0077] In some specific embodiments, refer to Figure 10 The dehumidifier also includes a first temperature detection unit 81, a second temperature detection unit 82, and a fan 7.

[0078] Evaporator 3, condenser 2, and fan 7 are stacked in sequence, with the outer side of evaporator 3 facing the return air inlet and the outer side of fan 7 facing the air outlet, forming an indoor air circulation path for dehumidified cold air to be heated by condenser 2 and blown out, thus preventing cold air from being blown out.

[0079] The first temperature detection unit 81 is installed on the evaporator 3 to detect the evaporation temperature; the second temperature detection unit 82 is installed at the return air vent to detect the ambient temperature.

[0080] The dehumidifier in this embodiment obtains the evaporation temperature and ambient temperature by setting a first temperature detection unit 81 and a second temperature detection unit 82 on the evaporator 3 and the return air vent, respectively. The three-way valve 55 can control the connection between the fifth end 551 and the sixth end 552 or the fifth end 551 and the seventh end 553 according to the evaporation temperature and / or ambient temperature, thereby improving the accuracy of the defrosting entry or exit timing.

[0081] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0082] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A dehumidifier, characterized in that, include: A compressor, which includes an exhaust port and an intake port; A condenser includes a first end and a second end; the first end is connected to the exhaust port via a pipeline. An evaporator, comprising a third end and a fourth end; the fourth end is connected to the air intake via a pipe. The first throttling element; the second end is connected to the third end through the first throttling element; The air supply line includes a first controllable switch for connecting or disconnecting the air supply line; the two ends of the air supply line are respectively connected to the exhaust port and the intake port.

2. The dehumidifier according to claim 1, characterized in that, The air supply line also includes a second throttling device; one end of the first pipeline controllable switch is connected to the exhaust port through the pipeline, and the other end is connected to one end of the second throttling device; the other end of the second throttling device is connected to the intake port.

3. The dehumidifier according to claim 1, characterized in that, The air supply line also includes a second throttling device; one end of the first pipeline controllable switch is connected to the first air intake port through the pipeline, and the other end is connected to one end of the second throttling device; the other end of the second throttling device is connected to the exhaust port.

4. The dehumidifier according to claim 2, characterized in that, The gas supply line also includes a one-way valve, which is located between the second throttling device and the first pipeline controllable switch, and is connected in series with the second throttling device and the first pipeline controllable switch through the pipeline.

5. The dehumidifier according to claim 2, characterized in that, The air supply line also includes a one-way valve, which is connected in series with the second throttling device and the first controllable switch of the line through a pipeline, and one end of the valve is connected to the air intake through a pipeline.

6. The dehumidifier according to any one of claims 1 to 5, characterized in that, It also includes a pressure detection unit, which is installed on the pipeline near the air intake, for detecting low pressure.

7. The dehumidifier according to any one of claims 1 to 5, characterized in that, The first throttling element is a capillary tube or an orifice plate throttling element; the second throttling element is a capillary tube or an orifice plate throttling element.

8. The dehumidifier according to claim 6, characterized in that, Also includes: The first exhaust pipe includes a second pipe controllable switch for connecting or disconnecting the first exhaust pipe; the two ends of the first exhaust pipe are respectively connected to the first end and the exhaust port. The second exhaust pipe includes a third pipe controllable switch for connecting or disconnecting the second exhaust pipe; the two ends of the second exhaust pipe are respectively connected to the third end and the exhaust port; the fourth end is connected to the intake port.

9. The dehumidifier according to claim 8, characterized in that, The second pipeline controllable switch and the third pipeline controllable switch are both three-way valves, which include a fifth end, a sixth end, and a seventh end; The fifth end, the sixth end, and the seventh end are respectively connected to the exhaust port, the first end, and the third end via pipes; the fifth end, the sixth end, and the pipes connected to the exhaust port and the first end form the first exhaust pipe; The fifth end, the seventh end, and the connection between the exhaust port and the third end form the second exhaust pipe.

10. The dehumidifier according to claim 9, characterized in that, It also includes a first temperature detection unit and a second temperature detection unit, which are respectively installed on the evaporator and at the return air vent, for detecting the temperature of the evaporator and the ambient temperature.

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