Dehumidifier

Abstract

The present invention provides a dehumidifier, comprising: a housing, having an air inlet and an air outlet; a first evaporator, arranged in the housing; a condenser, arranged in the housing, the condenser being arranged near the air outlet relative to the first evaporator; a compressor, respectively connected to the first evaporator and the condenser, the first evaporator, the condenser and the compressor forming a circulation passage for circulating refrigerant; a temperature regulating device, used for regulating the gas temperature, the temperature regulating device being located on a side of the condenser near the air outlet. The technical solution provided by the present invention can solve the problem that the temperature of the air blown out by the dehumidifier in the prior art cannot be adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidifiers, and in particular to a dehumidifier. Background Art

[0002] Dehumidifiers are used to remove excess moisture from the air and reduce the humidity of the air. Dehumidifiers can be used indoors or in vehicles. Existing dehumidifiers mainly include components such as compressors, condensers, and evaporators. The working process of the dehumidifier is as follows: the high-temperature and high-pressure refrigerant discharged from the compressor first passes through the condenser to condense and release heat, then enters the evaporator to evaporate and absorb heat, and finally returns to the compressor to complete the entire cycle. The conditioned humid air is cooled by the evaporator. When the temperature of the humid air drops below the dew point temperature, the moisture in the humid air condenses and precipitates. After the moisture content of the humid air is reduced, it becomes drier air, and then it is heated and discharged through the condenser.

[0003] This type of dehumidifier has the following problems: 1. When the external ambient temperature is high, the air temperature rises greatly after passing through the condenser (generally the condensation temperature is above 40°C), resulting in a high outlet temperature; 2. When the external ambient temperature is low, the air temperature rise after passing through the condenser is not high enough, resulting in a low outlet temperature. Both of the above problems lead to poor comfort for users when using the dehumidifier, so a dehumidifier that can adjust the outlet temperature is needed. Summary of the invention

[0004] The invention provides a dehumidifier to solve the problem that the temperature of air blown out by the dehumidifier in the prior art cannot be adjusted.

[0005] In order to solve the above problems, the present invention provides a dehumidifier, including: a shell, having an air inlet and an air outlet; a first evaporator, arranged in the shell; a condenser, arranged in the shell, and the condenser is arranged close to the air outlet relative to the first evaporator; a compressor, which is connected to the first evaporator and the condenser respectively, and the first evaporator, the condenser and the compressor form a circulation path for circulating refrigerant; a temperature control device, used to adjust the gas temperature, and the temperature control device is located on the side of the condenser close to the air outlet.

[0006] Furthermore, the temperature regulating device comprises: a second evaporator, the inlet of the second evaporator is connected to the outlet of the condenser, and the outlet of the second evaporator is connected to the inlet of the compressor.

[0007] Furthermore, the refrigerant is a non-azeotropic mixed refrigerant, and the dehumidifier also includes: a first gas-liquid separator, the inlet of the first gas-liquid separator is connected to the outlet of the condenser, and the gas outlet of the first gas-liquid separator is connected to the inlet of the first evaporator; a first pipeline, the inlet of the first pipeline is connected to the liquid outlet of the first gas-liquid separator, and the outlet of the first pipeline can be connected to the inlet of the second evaporator in an on-off manner.

[0008] Furthermore, the dehumidifier also includes: a heating unit for heating the gas; a second pipeline, the inlet of the second pipeline is connected to the liquid outlet of the first gas-liquid separator, and the outlet of the second pipeline can be connected to the outlet of the second evaporator in a disconnectable manner; wherein, when the second evaporator is running, the heating unit stops running, the first pipeline is connected, and the second pipeline is disconnected; when the heating unit is running, the first pipeline is disconnected, and the second pipeline is connected.

[0009] Furthermore, the dehumidifier also includes: a first heat exchanger, the inlet of the first heat exchanger is connected to the outlet of the second evaporator, the outlet of the first heat exchanger is connected to the inlet of the compressor, and the refrigerant entering the first heat exchanger evaporates and absorbs heat.

[0010] Furthermore, the dehumidifier also includes: a second heat exchanger, the inlet of the second heat exchanger is connected to the gas outlet of the first gas-liquid separator, the outlet of the second heat exchanger is connected to the inlet of the first evaporator, and the refrigerant entering the second heat exchanger condenses and releases heat.

[0011] Furthermore, the first heat exchanger and the second heat exchanger are arranged adjacent to each other, and the first heat exchanger and the second heat exchanger form a condenser evaporator.

[0012] Furthermore, a first throttle valve is provided on the pipeline connecting the second heat exchanger and the first evaporator.

[0013] Furthermore, a second throttle valve is arranged on the first pipeline.

[0014] Furthermore, the dehumidifier also includes: a third pipeline, the inlet of the third pipeline is connected to the outlet of the compressor, and the outlet of the third pipeline is connected to the first evaporator in an on-off manner.

[0015] Furthermore, the dehumidifier also includes: a first control valve, which is arranged on the third pipeline; a second control valve, which is arranged on the pipeline connecting the compressor and the condenser; wherein, when the first control valve is opened, the second control valve is closed, and when the first control valve is closed, the second control valve is opened.

[0016] Furthermore, the dehumidifier also includes: a second gas-liquid separator, which is arranged on the pipeline connecting the first evaporator and the compressor.

[0017] Furthermore, the dehumidifier also includes: a temperature sensor, which is arranged in the shell; and / or a humidity sensor, which is arranged in the shell.

[0018] By applying the technical solution of the present invention, a temperature regulating device is arranged on the side of the condenser of the dehumidifier close to the air outlet, so that the temperature of the gas passing through the condenser can be adjusted before being blown out to the outside of the dehumidifier. Such an arrangement can adjust the temperature of the gas blown out of the dehumidifier, avoiding the problem of the gas temperature being too high or too low, thereby improving the comfort of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 The schematic diagram of the structure of the dehumidifier provided by the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. First evaporator; 20. Condenser; 30. Compressor; 41. Second evaporator; 42. Heating unit; 51. First gas-liquid separator; 52. First pipeline; 53. Second pipeline; 54. Second throttle valve; 61. First heat exchanger; 62. Second heat exchanger; 63. First throttle valve; 71. Third pipeline; 72. First control valve; 73. Second control valve; 74. Third control valve; 81. Second gas-liquid separator; 82. Temperature sensor; 83. Humidity sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a dehumidifier, which includes a shell, a first evaporator 10 and a condenser 20. The shell has an air inlet and an air outlet, and the gas can flow in the shell. The first evaporator 10 is arranged in the shell, and the condenser 20 is arranged in the shell and close to the air outlet. The compressor 30 is connected to the first evaporator 10 and the condenser 20 respectively, and the first evaporator 10, the condenser 20 and the compressor 30 form a circulation passage for circulating refrigerant. The temperature control device is located on the side of the condenser 20 close to the air outlet, and the temperature control device is used to adjust the temperature of the gas output from the condenser 20.

[0025] By applying the technical solution of this embodiment, a temperature regulating device is provided on the side of the condenser 20 of the dehumidifier close to the air outlet, so that the temperature of the gas passing through the condenser 20 can be adjusted before being blown out to the outside of the dehumidifier. Such a setting can adjust the temperature of the gas blown out of the dehumidifier, avoiding the problem of the gas temperature being too high or too low, thereby improving the comfort of the user.

[0026] Specifically, the temperature regulating device includes a cooling unit, which is used to cool the gas. When the external environment temperature is high, the cooling unit can be operated to cool the gas. In this way, the gas treated by the dehumidifier can reduce humidity and maintain a suitable temperature, thereby improving the comfort of the user.

[0027] In this embodiment, the cooling unit can be set as a second evaporator 41, the inlet of the second evaporator 41 is connected to the outlet of the condenser 20, and the outlet of the second evaporator 41 is connected to the inlet of the compressor 30. The refrigerant output from the compressor 30 can enter the second evaporator 41, evaporate and absorb heat in the second evaporator 41, so that the gas passing through the second evaporator 41 can be cooled down, so that the gas reaches a suitable temperature.

[0028] A heating unit 42 may also be provided in the temperature control device. When the external environment temperature is low, the heating unit 42 may be operated to heat the gas. In this way, the gas treated by the dehumidifier can reduce humidity and maintain a suitable temperature, thereby improving the comfort of the user. The heating unit 42 may be provided as an electric heater to improve the heating effect while reducing the manufacturing cost of the device.

[0029] Specifically, in the present embodiment, the refrigerant is a non-azeotropic mixed refrigerant, and the non-azeotropic mixed refrigerant contains at least two refrigerants with different boiling points. The dehumidifier further includes a first gas-liquid separator 51 and a first pipeline 52, wherein the inlet of the first gas-liquid separator 51 is connected to the outlet of the condenser 20, and the gas outlet of the first gas-liquid separator 51 is connected to the inlet of the first evaporator 10. The inlet of the first pipeline 52 is connected to the liquid outlet of the first gas-liquid separator 51, and the outlet of the first pipeline 52 can be connected and disconnected to the inlet of the second evaporator 41.

[0030] After the non-azeotropic mixed refrigerant is compressed by the compressor 30, the superheated gas of high temperature and high pressure is discharged from the outlet of the compressor 30, and then enters the condenser 20 to condense and release heat. Due to the different boiling points of different refrigerants in the non-azeotropic mixed refrigerant, a large amount of high-boiling-point refrigerant and a small amount of low-boiling-point refrigerant are first condensed into liquid in the condenser 20, while most of the low-boiling-point refrigerant and a small amount of high-boiling-point refrigerant remain in a gaseous state. Then the non-azeotropic mixed refrigerant enters the first gas-liquid separator 51 and is separated into a gaseous refrigerant and a liquid refrigerant. Among them, when it is necessary to cool the air, most of the liquid refrigerant can enter the second evaporator 41 from the liquid outlet of the first gas-liquid separator 51, and evaporate in the second evaporator 41 to absorb heat, thereby cooling the air passing through the second evaporator 41. The refrigerant output from the second evaporator 41 can return to the compressor 30.

[0031] At the same time, most of the liquid refrigerant is output from the gas outlet of the first gas-liquid separator 51 and enters the first evaporator 10, and then evaporates and absorbs heat in the first evaporator 10, thereby cooling the humid air passing through the first evaporator 10. When the temperature of the humid air drops below the dew point temperature, most of the water condenses and precipitates from the humid air, thereby completing the drying of the humid air. The refrigerant output from the first evaporator 10 returns to the compressor to complete a cycle. When the external ambient temperature is high, the temperature of the air passing through the condenser 20 is high. Since the second evaporator 41 is provided, the air can be cooled, so that the air output from the dehumidifier is low-humidity air with a suitable temperature, thereby avoiding the problem of excessively high outlet air temperature affecting user comfort.

[0032] In this embodiment, the non-azeotropic mixed refrigerant can be set to two refrigerants with different boiling points. For example, R236fa and R32, or R600a and R32, or R600 and R32, or R600 and R290. In order to improve the gas-liquid separation effect, two refrigerants with a boiling point temperature difference of more than 40°C can be selected.

[0033] like Figure 1 As shown, the dehumidifier further includes a heating unit 42 and a second pipeline 53. The heating unit 42 is used to heat the gas passing through the condenser 20. The inlet of the second pipeline 53 is connected to the liquid outlet of the first gas-liquid separator 51, and the outlet of the second pipeline 53 can be connected to the outlet of the second evaporator 41 in an on-off manner. When the second evaporator 41 is in operation, the heating unit 42 stops operating, the first pipeline 52 is connected, and the second pipeline 53 is disconnected, and the air can be cooled down at this time. When the heating unit 42 is in operation, the first pipeline 52 is disconnected, and the second pipeline 53 is connected. At this time, the refrigerant output from the liquid outlet of the first gas-liquid separator 51 does not pass through the second evaporator 41, and the second evaporator 41 stops operating, so that the air can be heated. By setting the first pipeline 52 and the second pipeline 53, the flow path of the refrigerant can be adjusted, so that the air can be heated or cooled as needed.

[0034] In this embodiment, the dehumidifier further includes a first heat exchanger 61, the inlet of the first heat exchanger 61 is connected to the outlet of the second evaporator 41, the outlet of the first heat exchanger 61 is connected to the inlet of the compressor 30, and the first heat exchanger 61 is used to release heat and condense the refrigerant. In this way, the refrigerant output from the second evaporator 41 can enter the first heat exchanger 61 to continue evaporating and absorbing heat. Since the refrigerant passing through the second evaporator 41 may not evaporate completely, it can continue to evaporate and absorb heat after entering the first heat exchanger 61. In this way, the refrigerant output from the first heat exchanger 61 can all be converted into a gaseous state, and then enter the compressor 30 to ensure that the refrigerant entering the compressor 30 is a gaseous refrigerant, thereby improving the reliability of the compressor 30 and the dehumidifier as a whole.

[0035] Furthermore, the dehumidifier further includes a second heat exchanger 62, the inlet of the second heat exchanger 62 is connected to the gas outlet of the first gas-liquid separator 51, and the outlet of the second heat exchanger 62 is connected to the inlet of the first evaporator 10. In this way, the gaseous refrigerant output from the gas outlet of the first gas-liquid separator 51 can condense and release heat after entering the second heat exchanger 62, so that the refrigerant changes from gas to liquid, and then enters the first evaporator 10 to evaporate and absorb heat better, thereby cooling and dehumidifying the humid air.

[0036] In this embodiment, the first heat exchanger 61 and the second heat exchanger 62 are arranged adjacent to each other, and the first heat exchanger 61 and the second heat exchanger 62 form a condenser evaporator. Such an arrangement can promote the evaporation heat absorption process of the refrigerant in the first heat exchanger 61 and the condensation heat release process of the refrigerant in the second heat exchanger 62, thereby improving the performance of the dehumidifier and reducing the energy consumption of the dehumidifier.

[0037] like Figure 1 As shown, a first throttle valve 63 is provided on the pipeline connecting the second heat exchanger 62 and the first evaporator 10. By providing the first throttle valve 63, the refrigerant output from the second heat exchanger 62 can be throttled and depressurized, thereby further reducing the temperature of the refrigerant, so that the refrigerant can better cool and dehumidify the humid air after entering the first evaporator 10.

[0038] Preferably, a second throttle valve 54 is provided on the first pipeline 52. By providing the second throttle valve 54, the refrigerant output from the first gas-liquid separator 51 can be throttled and depressurized, thereby further reducing the temperature of the refrigerant, so that the refrigerant can better cool the air after entering the second evaporator 41.

[0039] In this embodiment, a third control valve 74 may be provided on the second pipeline 53, and the flow direction of the refrigerant may be adjusted as required by providing the third control valve 74. When the air needs to be cooled, the third control valve 74 is closed, and the refrigerant output from the liquid outlet of the first gas-liquid separator 51 enters the second evaporator 41 to cool the air. When the air does not need to be cooled, the third control valve 74 is opened, and the refrigerant output from the liquid outlet of the first gas-liquid separator 51 bypasses the second evaporator 41 and directly enters the first heat exchanger 61.

[0040] When the external temperature of the first evaporator 10 is lower than 0°C, frost may form on the outside of the first evaporator 10, which may affect the normal use of the dehumidifier. In order to meet the needs of defrosting, in this embodiment, the dehumidifier further includes a third pipeline 71, the inlet of the third pipeline 71 is connected to the outlet of the compressor 30, and the outlet of the third pipeline 71 is connected to the first evaporator 10 in an on-off manner. In this way, when the first evaporator 10 is frosted, the high-temperature and high-pressure refrigerant output from the compressor 30 can directly enter the first evaporator 10, thereby heating the first evaporator 10 to melt the frost.

[0041] Specifically, the dehumidifier further includes a first control valve 72 and a second control valve 73. The first control valve 72 is arranged on the third pipeline 71, and the second control valve 73 is arranged on the pipeline connecting the compressor 30 and the condenser 20. When the first evaporator 10 needs to be defrosted, the first control valve 72 is opened and the second control valve 73 is closed, and this is the defrosting working mode. When it is the normal dehumidification working mode, when the first control valve 72 is closed, the second control valve 73 is opened. Such a setting can set the working mode of the dehumidifier according to the actual situation, so as to facilitate the use of the user.

[0042] Furthermore, the dehumidifier further includes a second gas-liquid separator 81, which is arranged on a pipeline connecting the first evaporator 10 and the compressor 30. In this arrangement, the refrigerant can first enter the second gas-liquid separator 81 before entering the compressor 30, so that the liquid in the refrigerant can be separated and retained in the second gas-liquid separator 81, and then the separated gas enters the compressor 30 to realize circulation. Such an arrangement can ensure the performance and service life of the compressor 30.

[0043] like Figure 1 As shown, the dehumidifier also includes a temperature sensor 82, which is arranged in the housing. The temperature sensor 82 is used to measure the temperature of the air, so that the working mode of the dehumidifier can be adjusted according to the measurement situation. The temperature sensor 82 can be arranged near the first evaporator 10 or near the heating part 42 to measure the temperature at different positions. When the temperature of the gas passing through the condenser 20 is measured to be lower than a certain value, such as 18°C, the heating part 42 can be operated to heat the air, and when the temperature of the gas passing through the condenser 20 is measured to be higher than a certain value, the second evaporator 41 can be operated to cool the air. The dehumidifier can also include a humidity sensor 83, which is arranged in the housing. The humidity of the air can be measured by the humidity sensor 83 to adjust the working mode of the dehumidifier accordingly.

[0044] In this embodiment, the dehumidifier further includes a fan, which is disposed in the housing. The fan can be provided to strengthen the flow of air, thereby improving the dehumidification effect and dehumidification efficiency of the dehumidifier. The fan can be provided close to the air inlet of the housing, or close to the air outlet of the housing. A water collector and a drain pipe can also be provided below the housing to collect and discharge the moisture precipitated from the humid air.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0048] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0050] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

Claims

1. A dehumidifier, characterized in that: include: A housing having an air inlet and an air outlet; A first evaporator (10) is arranged in the shell; A condenser (20) is arranged in the shell, and the condenser (20) is arranged relative to the first evaporator (10) and close to the air outlet; A compressor (30) is connected to the first evaporator (10) and the condenser (20) respectively, and the first evaporator (10), the condenser (20) and the compressor (30) form a circulation passage for circulating refrigerant; A temperature regulating device, used for regulating the temperature of the gas, the temperature regulating device being located on a side of the condenser (20) close to the air outlet; The temperature regulating device comprises: a second evaporator (41), wherein an inlet of the second evaporator (41) is communicated with an outlet of the condenser (20), and an outlet of the second evaporator (41) is communicated with an inlet of the compressor (30); The refrigerant is a non-azeotropic mixed refrigerant, and the dehumidifier further comprises: a first gas-liquid separator (51), wherein the inlet of the first gas-liquid separator (51) is communicated with the outlet of the condenser (20), and the gas outlet of the first gas-liquid separator (51) is communicated with the inlet of the first evaporator (10); a first pipeline (52), wherein the inlet of the first pipeline (52) is connected to the liquid outlet of the first gas-liquid separator (51), and the outlet of the first pipeline (52) is connected to the inlet of the second evaporator (41) in an on-off manner; The dehumidifier also includes: A heating unit (42), used for heating the gas; a second pipeline (53), wherein the inlet of the second pipeline (53) is connected to the liquid outlet of the first gas-liquid separator (51), and the outlet of the second pipeline (53) is connected to the outlet of the second evaporator (41) in an on-off manner; Wherein, when the second evaporator (41) is in operation, the heating unit (42) stops operating, the first pipeline (52) is connected, and the second pipeline (53) is disconnected; When the heating unit (42) is in operation, the first pipeline (52) is disconnected and the second pipeline (53) is connected.

2. The dehumidifier according to claim 1, characterized in that: The dehumidifier also includes: A first heat exchanger (61), wherein the inlet of the first heat exchanger (61) is connected to the outlet of the second evaporator (41), and the outlet of the first heat exchanger (61) is connected to the inlet of the compressor (30), and the refrigerant entering the first heat exchanger (61) evaporates and absorbs heat.

3. The dehumidifier according to claim 2, characterized in that: The dehumidifier also includes: A second heat exchanger (62), wherein the inlet of the second heat exchanger (62) is connected to the gas outlet of the first gas-liquid separator (51), and the outlet of the second heat exchanger (62) is connected to the inlet of the first evaporator (10), and the refrigerant entering the second heat exchanger (62) condenses and releases heat.

4. The dehumidifier according to claim 3, characterized in that: The first heat exchanger (61) and the second heat exchanger (62) are arranged adjacent to each other, and the first heat exchanger (61) and the second heat exchanger (62) form a condenser evaporator.

5. The dehumidifier according to claim 3, characterized in that: A first throttle valve (63) is provided on a pipeline connecting the second heat exchanger (62) and the first evaporator (10).

6. The dehumidifier according to claim 1, characterized in that: A second throttle valve (54) is provided on the first pipeline (52).

7. The dehumidifier according to claim 1, characterized in that: The dehumidifier also includes: A third pipeline (71), wherein the inlet of the third pipeline (71) is connected to the outlet of the compressor (30), and the outlet of the third pipeline (71) is connected to the first evaporator (10) in an on-off manner.

8. The dehumidifier according to claim 7, characterized in that: The dehumidifier also includes: A first control valve (72) is arranged on the third pipeline (71); a second control valve (73) disposed on a pipeline connecting the compressor (30) and the condenser (20); When the first control valve (72) is opened, the second control valve (73) is closed, and when the first control valve (72) is closed, the second control valve (73) is opened.

9. The dehumidifier according to claim 1, characterized in that: The dehumidifier also includes: The second gas-liquid separator (81) is arranged on a pipeline connecting the first evaporator (10) and the compressor (30).

10. The dehumidifier according to claim 1, characterized in that: The dehumidifier also includes: a temperature sensor (82), disposed in the housing; and / or A humidity sensor (83) is arranged in the housing.

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