Constant-temperature dehumidification system

Abstract

The utility model provides a constant temperature dehumidification system and air conditioner, constant temperature dehumidification system includes: air pipe, liquid pipe, first heat exchanger and second heat exchanger, the one end of first heat exchanger can be communicated with air pipe through first pipeline, and the other end of first heat exchanger can be communicated with liquid pipe through second pipeline, one end of the second heat exchanger can communicate with the air pipe through a third pipeline, the other end of the second heat exchanger can communicate with the liquid pipe through a fourth pipeline, and a fifth pipeline is further connected between the first pipeline and the fourth pipeline. In a refrigeration mode, the first heat exchanger and the second heat exchanger are connected in parallel; in a heating mode, the first heat exchanger is connected with the second heat exchanger in parallel; in a dehumidification mode, the first heat exchanger and the second heat exchanger are connected in series. According to the utility model, three different modes of refrigeration, heating and dehumidification can be formed through a two-pipe structure, the refrigeration performance and the refrigeration efficiency can be improved, the installation structure is simple, and the cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, concretely relates to a constant temperature dehumidification system and air conditioner. BACKGROUND

[0002] With the increasing popularity of air conditioners, different user groups have different requirements for the outlet air temperature of the indoor unit under different climatic conditions. For example, in the plum rain season in the south, although the indoor temperature is not high, the environmental humidity is high. At this time, the humidity is often reduced by dehumidification of the air conditioner. However, the outlet air temperature of the indoor unit of the conventional air conditioning system is often low during dehumidification, resulting in poor comfort of use. Air conditioner manufacturers use three-pipe indoor units for reheating dehumidification, but the actual engineering installation is relatively complex and the cost is high. Therefore, the existing technology needs to be improved to improve the comfort of use.

[0003] Because the constant temperature dehumidification system in the prior art uses three-pipe reheating dehumidification, it has the technical problems of complex installation and high cost, therefore the utility model researches and designs a constant temperature dehumidification system and air conditioner. UTILITY MODEL CONTENT

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the constant temperature dehumidification system in the prior art, which uses three-pipe reheating dehumidification, has complex installation and high cost, thereby providing a constant temperature dehumidification system and air conditioner.

[0005] In order to solve the above problems, the utility model provides a constant temperature dehumidification system, which comprises:

[0006] The gas pipe, the liquid pipe, the first heat exchanger and the second heat exchanger, one end of the first heat exchanger can be connected to the gas pipe through the first pipeline, the other end of the first heat exchanger can be connected to the liquid pipe through the second pipeline, one end of the second heat exchanger can be connected to the gas pipe through the third pipeline, the other end of the second heat exchanger can be connected to the liquid pipe through the fourth pipeline, and the first pipeline and the fourth pipeline are further connected with the fifth pipeline;

[0007] In the refrigeration mode, the first heat exchanger and the second heat exchanger are connected in parallel, and the refrigerant enters the first heat exchanger and the second heat exchanger from the liquid pipe respectively, exchanges heat and then is discharged from the gas pipe; in the heating mode, the first heat exchanger and the second heat exchanger are connected in parallel, and the refrigerant enters the first heat exchanger and the second heat exchanger from the gas pipe respectively, exchanges heat and then is discharged from the liquid pipe; in the dehumidification mode, the first heat exchanger and the second heat exchanger are connected in series, so that the air first passes through the second heat exchanger to evaporate and dehumidify, and then passes through the first heat exchanger to reheat and increase the temperature.

[0008] In some embodiments,

[0009] In the refrigeration mode, the first pipeline connects the gas pipe with one end of the first heat exchanger, the second pipeline connects the liquid pipe with the other end of the first heat exchanger, the third pipeline connects the gas pipe with one end of the second heat exchanger, the fourth pipeline connects the liquid pipe with the other end of the second heat exchanger, and the fifth pipeline is disconnected; the refrigerant enters the first heat exchanger from the liquid pipe through the second pipeline, evaporates and cools in the first heat exchanger, and then enters the gas pipe through the first pipeline; the refrigerant also enters the second heat exchanger from the liquid pipe through the fourth pipeline, evaporates and cools in the second heat exchanger, and then enters the gas pipe through the third pipeline.

[0010] In the heating mode, the first pipeline connects the gas pipe with one end of the first heat exchanger, the second pipeline connects the liquid pipe with the other end of the first heat exchanger, the third pipeline connects the gas pipe with one end of the second heat exchanger, the fourth pipeline connects the liquid pipe with the other end of the second heat exchanger, and the fifth pipeline is disconnected; the refrigerant enters the first heat exchanger from the gas pipe through the first pipeline, condenses and releases heat in the first heat exchanger, and then enters the liquid pipe through the second pipeline; the refrigerant also enters the second heat exchanger from the gas pipe through the third pipeline, condenses and releases heat in the second heat exchanger, and then enters the liquid pipe through the fourth pipeline.

[0011] In the dehumidification mode, the first pipeline, the fifth pipeline and the fourth pipeline are sequentially connected to connect one end of the first heat exchanger with the other end of the second heat exchanger, the second pipeline connects the liquid pipe with the other end of the first heat exchanger, and the third pipeline connects the gas pipe with one end of the second heat exchanger; the refrigerant enters the first heat exchanger from the liquid pipe through the second pipeline, condenses and releases heat in the first heat exchanger, enters the second heat exchanger through the first pipeline, the fifth pipeline and the fourth pipeline, evaporates and cools in the second heat exchanger, and then enters the gas pipe through the third pipeline.

[0012] In some embodiments,

[0013] The fourth throttling device is further arranged on the first pipeline, and the second throttling device is further arranged on the second pipeline.

[0014] In some embodiments,

[0015] The first throttling device is further arranged on the fourth pipeline.

[0016] In some embodiments,

[0017] One end of the fifth pipeline is communicated to the first pipeline and located between the first heat exchanger and the fourth throttling device, and the other end of the fifth pipeline is communicated to the fourth pipeline and located between the second heat exchanger and the first throttling device.

[0018] In some embodiments,

[0019] The third throttling device is further arranged on the fifth pipeline.

[0020] In some embodiments,

[0021] The first throttling device, the second throttling device, the third throttling device and the fourth throttling device are all electronic expansion valves.

[0022] In some embodiments,

[0023] The fan, the first heat exchanger and the second heat exchanger are located on the same air flow path, and the second heat exchanger is located on the upstream side of the first heat exchanger along the air flow direction.

[0024] In some embodiments,

[0025] The fan is located on the upstream side of the second heat exchanger along the air flow direction.

[0026] The utility model further provides a kind of air conditioner, it includes the constant temperature dehumidification system of preceding.

[0027] The utility model provides a kind of constant temperature dehumidification system and air conditioner with following beneficial effects:

[0028] The utility model can form the parallel connection between two heat exchangers in refrigeration mode by air pipe, liquid pipe, first and second heat exchangers and first, second, third, fourth and fifth pipelines, so that evaporation refrigeration is formed by two parallel heat exchangers in refrigeration, which effectively increases refrigeration performance and refrigeration efficiency compared with single heat exchanger, form the parallel connection between two heat exchangers in heating mode, so that condensation heating is formed by two parallel heat exchangers in heating, which effectively increases heating performance and refrigeration efficiency compared with single heat exchanger, and series connection between two heat exchangers can be formed in dehumidification mode, so that air is first evaporated and dehumidified by the second heat exchanger, and then reheated by the first heat exchanger, effectively completing constant temperature dehumidification, so that the utility model can not only form three different modes of refrigeration, heating and dehumidification by two-pipe structure, but also improve refrigeration performance and refrigeration efficiency in refrigeration or heating mode by parallel heat exchanger, and improve heating performance and heating efficiency, installation structure is simple, and cost is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a system structure diagram of the constant temperature dehumidification system of the utility model;

[0030] Figure 2 is a refrigerant flow direction schematic diagram of the constant temperature dehumidification system of the utility model in the refrigeration mode;

[0031] Figure 3 is a refrigerant flow direction schematic diagram of the constant temperature dehumidification system of the utility model in the heating mode;

[0032] Figure 4 is a refrigerant flow direction schematic diagram of the constant temperature dehumidification system of the utility model in the dehumidification mode.

[0033] The reference signs are represented as:

[0034] 1, air pipe; 2, liquid pipe; 3, first heat exchanger; 4, second heat exchanger; 5, first throttling device; 6, second throttling device; 7, third throttling device; 8, fourth throttling device; 9, fan; 101, first pipeline; 102, second pipeline; 103, third pipeline; 104, fourth pipeline; 105, fifth pipeline. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts are within the protection scope of the utility model.

[0036] 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 application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0037] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made to the embodiments described without departing from the spirit and scope of the application. For example, the various features of the application can be combined in any combination, where possible. Accordingly, the scope of the application is to be construed as encompassing modifications and variations of the specific examples described herein, subject only to the conditions of the prior art.

[0038] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0039] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0040] In addition, it should be noted that the use of the words "first", "second" and the like to define parts of components is only for the convenience of distinguishing the corresponding parts of components, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0041] AsFigures 1-4 The utility model provides a constant temperature dehumidification system, it includes:

[0042] Air pipe 1, liquid pipe 2, first heat exchanger 3 and second heat exchanger 4, one end of first heat exchanger 3 can be communicated to air pipe 1 through first pipeline 101, the other end of first heat exchanger 3 can be communicated to liquid pipe 2 through second pipeline 102, one end of second heat exchanger 4 can be communicated to air pipe 1 through third pipeline 103, the other end of second heat exchanger 4 can be communicated to liquid pipe 2 through fourth pipeline 104, still be connected with fifth pipeline 105 between first pipeline 101 with fourth pipeline 104;

[0043] When refrigeration mode, first heat exchanger 3 with second heat exchanger 4 are in parallel, and refrigerant is discharged from air pipe 1 after heat exchange in first heat exchanger 3 and second heat exchanger 4 from liquid pipe 2 respectively;When heating mode, first heat exchanger 3 with second heat exchanger 4 are in parallel, and refrigerant is discharged from liquid pipe 2 after heat exchange in first heat exchanger 3 and second heat exchanger 4 from air pipe 1 respectively;When dehumidification mode, first heat exchanger 3 and second heat exchanger 4 are in series, so that air is evaporated and dehumidified first through second heat exchanger 4, and then reheated and warmed up through first heat exchanger 3.

[0044] The utility model discloses a air pipe, liquid pipe, first and second heat exchanger and first, second, third, fourth and fifth pipeline, can make in refrigeration mode form the parallel connection between two heat exchangers, thereby make evaporative refrigeration through two parallel heat exchangers when refrigeration, compared with single heat exchanger effectively increased refrigeration performance and refrigeration efficiency, form the parallel connection between two heat exchangers when heating mode, thereby make condensing heating through two parallel heat exchangers when heating, compared with single heat exchanger effectively increased heating performance and refrigeration efficiency, and can form the series connection between two heat exchangers when dehumidification mode, so that air is evaporated and dehumidified first through second heat exchanger, and then reheated and warmed up through first heat exchanger, effectively complete constant temperature dehumidification, therefore the utility model not only can form refrigeration, heating and dehumidification three different modes through two pipe structure, but also can improve refrigeration performance and refrigeration efficiency and improve heating performance and heating efficiency through parallel heat exchanger when refrigeration or heating mode, installation structure is simple, and cost is effectively reduced.

[0045] In some embodiments,

[0046] In the cooling mode, the first pipe 101 connects the gas pipe 1 with one end of the first heat exchanger 3, the second pipe 102 connects the liquid pipe 2 with the other end of the first heat exchanger 3, the third pipe 103 connects the gas pipe 1 with one end of the second heat exchanger 4, the fourth pipe 104 connects the liquid pipe 2 with the other end of the second heat exchanger 4, and the fifth pipe 105 is disconnected; the refrigerant enters the first heat exchanger 3 from the liquid pipe 2 through the second pipe 102, evaporates and cools in the first heat exchanger 3, and then enters the gas pipe 1 through the first pipe 101; the refrigerant also enters the second heat exchanger 4 from the liquid pipe 2 through the fourth pipe 104, evaporates and cools in the second heat exchanger 4, and then enters the gas pipe 1 through the third pipe 103.

[0047] In the heating mode, the first pipe 101 connects the gas pipe 1 with one end of the first heat exchanger 3, the second pipe 102 connects the liquid pipe 2 with the other end of the first heat exchanger 3, the third pipe 103 connects the gas pipe 1 with one end of the second heat exchanger 4, the fourth pipe 104 connects the liquid pipe 2 with the other end of the second heat exchanger 4, and the fifth pipe 105 is disconnected; the refrigerant enters the first heat exchanger 3 from the gas pipe 1 through the first pipe 101, condenses and releases heat in the first heat exchanger 3, and then enters the liquid pipe 2 through the second pipe 102; the refrigerant also enters the second heat exchanger 4 from the gas pipe 1 through the third pipe 103, condenses and releases heat in the second heat exchanger 4, and then enters the liquid pipe 2 through the fourth pipe 104.

[0048] In the dehumidifying mode, the first pipe 101, the fifth pipe 105, and the fourth pipe 104 are sequentially connected to connect one end of the first heat exchanger 3 with the other end of the second heat exchanger 4, the second pipe 102 connects the liquid pipe 2 with the other end of the first heat exchanger 3, and the third pipe 103 connects the gas pipe 1 with one end of the second heat exchanger 4; the refrigerant enters the first heat exchanger 3 from the liquid pipe 2 through the second pipe 102, condenses and releases heat in the first heat exchanger 3, and then enters the second heat exchanger 4 through the first pipe 101, the fifth pipe 105, and the fourth pipe 104; the refrigerant evaporates and cools in the second heat exchanger 4, and then enters the gas pipe 1 through the third pipe 103.

[0049] The application is the optimal connection form under three modes, that is, parallel connection between the two heat exchangers in the refrigeration mode, and the connection between the gas pipe and the liquid pipe, so that the refrigerant entering the liquid pipe is evaporated and refrigerated in the first and second heat exchangers respectively, and flows out from the gas pipe, thereby improving the evaporative heat exchange flow and increasing the refrigeration performance; the parallel connection between the two heat exchangers in the heating mode, and the connection between the gas pipe and the liquid pipe, so that the refrigerant entering the gas pipe is evaporated and refrigerated in the first and second heat exchangers respectively, and flows out from the liquid pipe, thereby improving the condensing heat exchange flow and increasing the heating performance; the series connection between the two heat exchangers in the dehumidification mode, and the connection between the gas pipe and the liquid pipe, so that the refrigerant entering the liquid pipe is firstly heated in the first heat exchanger, then enters the second heat exchanger after throttling to evaporate and refrigerate, and flows out from the gas pipe, thereby realizing the effect of constant temperature dehumidification.

[0050] In some embodiments,

[0051] The fourth throttling device 8 is further arranged on the first pipeline 101, and the second throttling device 6 is further arranged on the second pipeline 102.

[0052] The fourth throttling device on the first pipeline can control the on-off of the first pipeline and adjust the refrigerant flow in the pipeline, and the second throttling device on the second pipeline can control the on-off of the first pipeline and adjust the refrigerant flow in the pipeline.

[0053] In some embodiments,

[0054] The first throttling device 5 is further arranged on the fourth pipeline 104.

[0055] The first throttling device on the fourth pipeline can control the on-off of the fourth pipeline and adjust the refrigerant flow in the pipeline.

[0056] In some embodiments,

[0057] One end of the fifth pipeline 105 is connected to the first pipeline 101 and located between the first heat exchanger 3 and the fourth throttling device 8, and the other end of the fifth pipeline 105 is connected to the fourth pipeline 104 and located between the second heat exchanger 4 and the first throttling device 5.

[0058] The utility model discloses still through the fifth pipeline one end intercommunication to the first pipeline and be located the position between first heat exchanger and fourth throttling device, can make open third throttling device and disconnect fourth throttling device when constant temperature dehumidification, realize the refrigerant in first heat exchanger through fifth pipeline and throttling after entering second heat exchanger, form first heat exchanger heat release, second heat exchanger evaporation refrigeration, complete to air constant temperature dehumidification purpose, the first throttling device on fourth pipeline closes, disconnects the direct intercommunication between liquid pipe and second heat exchanger, thereby form the series connection between two heat exchangers, realize constant temperature dehumidification purpose.

[0059] In some embodiments,

[0060] The third throttling device 7 is arranged on the fifth pipeline 105.

[0061] The utility model discloses still through the third throttling device of setting up on fifth pipeline, can open third throttling device and close first and fourth throttling device under constant temperature dehumidification mode, utilize third throttling device to refrigerant throttling, realize second heat exchanger first air evaporation dehumidification while first and second heat exchanger series connection in fifth pipeline, utilize first heat exchanger to air reheating again, complete constant temperature dehumidification effect.

[0062] In some embodiments,

[0063] The first throttling device 5, the second throttling device 6, the third throttling device 7 and the fourth throttling device 8 are all electronic expansion valves.

[0064] This is the preferred structure form of four throttling devices of the utility model, that is, all preferably electronic expansion valves can realize the role of refrigerant throttling expansion.

[0065] In some embodiments,

[0066] It also includes a fan 9, the fan 9, the first heat exchanger 3 and the second heat exchanger 4 are located on the same airflow path, and the second heat exchanger 4 is located on the upstream side of the first heat exchanger 3 along the airflow flow direction.

[0067] The utility model discloses still through the setting of fan, and fan, first and second heat exchanger are located on the same airflow path, and second heat exchanger is located on the upstream side of first heat exchanger, can utilize second heat exchanger to air evaporation refrigeration after reheat, realize constant temperature dehumidification purpose and effect after flowing through first heat exchanger.

[0068] In some embodiments,

[0069] The fan 9 is located on the upstream side of the second heat exchanger 4 along the airflow flow direction.

[0070] The utility model can achieve the effect of blowing air to the second heat exchanger by arranging the fan on the upstream side of the second heat exchanger, blowing the air flow to the second heat exchanger for evaporative cooling first and then flowing through the first heat exchanger for reheating, thereby achieving the effect of constant temperature dehumidification.

[0071] The components are connected as follows: Starting from the liquid inlet, the indoor unit's liquid inlet pipe splits into two, one end connecting to the second throttling device 6, which then connects to the inlet of the first heat exchanger 3. The outlet of the first heat exchanger 3 connects to the third throttling device 7 at one end and the fourth throttling device 8 at the other. Another section of the liquid pipe connects to the first throttling device 5. The outlets of the first throttling device 5 and the third throttling device 7 merge and connect to the inlet of the second heat exchanger 4. The outlet of the second heat exchanger 4 connects to the indoor unit's air pipe. The indoor fan is placed near the second heat exchanger 4, and the indoor air flows through the second heat exchanger 4 before passing through the first heat exchanger 3.

[0072] The refrigeration operation principle of this utility model:

[0073] At this time, the first throttling device 5 and the second throttling device 6 are partially opened, the third throttling device 7 is closed, and the fourth throttling device 8 is fully opened. After cooling in the outdoor unit, the refrigerant flows into the liquid pipe of the indoor unit. After being throttled by the first throttling device 5, it enters the first heat exchanger 3 to evaporate and absorb heat. After being throttled by the second throttling device 6, it evaporates and absorbs heat in the second heat exchanger 4, thereby achieving the effect of cooling and cooling. The refrigerant vapor that has evaporated and absorbed heat passes through the indoor unit gas pipe and returns to the outdoor unit.

[0074] Heating operation principle:

[0075] At this time, the first throttling device 5 and the second throttling device 6 are partially opened, the third throttling device 7 is closed, and the fourth throttling device 8 is fully opened. The high-temperature gas refrigeration machine flows into the first heat exchanger 3 and the second heat exchanger 4 through the indoor unit gas pipe, and is cooled and releases heat, thereby achieving the effect of heating and heating. The cooled refrigerant liquid passes through the first throttling device 5 and the second throttling device 6 and the indoor unit liquid pipe and returns to the outdoor unit.

[0076] Constant temperature dehumidification operation principle:

[0077] At this time, the second throttling device 6 and the third throttling device 7 are opened, the first throttling device 5 and the fourth throttling device 8 are closed, and the flow direction of the indoor air first passes through the second heat exchanger 4 and then passes through the first heat exchanger 3.

[0078] The refrigerant is cooled in the outdoor unit, and the liquid refrigerant at medium temperature is guided to the indoor unit through the liquid pipe, and flows into the first heat exchanger 3 through the second throttling device 6, is cooled again in the first heat exchanger 3, and heats and warms the cold air passing through the second heat exchanger 4, the refrigerant is cooled and releases heat, is throttled through the third throttling device 7, is evaporated and absorbs heat in the second heat exchanger 4, and the refrigerant vapor after the evaporation and heat absorption is guided to the outdoor unit through the gas pipe.

[0079] The indoor air is cooled and dehumidified through the second heat exchanger 4, and then is heated and warmed through the first heat exchanger 3, so that the temperature of the air entering and exiting the indoor unit remains unchanged.

[0080] The utility model also provides a kind of air conditioner, it includes the constant temperature dehumidification system of preceding.

[0081] When the existing ordinary heat pump air conditioner is dehumidified, the indoor environment temperature is reduced, which causes user's discomfort. And in the current industry, the multi-split unit constant temperature dehumidification scheme uses three pipes in the indoor unit, which increases the installation cost and makes the installation more complex.

[0082] The utility model discloses a two-pipe indoor unit, four built-in electronic expansion valves can realize constant temperature dehumidification effect, solve the problem of discomfort during dehumidification, and reduce installation cost, installation is simple, and installation efficiency is improved.

[0083] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model. The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the technical principle of the utility model, a plurality of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the utility model.

Claims

1. A constant temperature dehumidification system, characterized by: It comprises: a gas pipe (1), a liquid pipe (2), a first heat exchanger (3) and a second heat exchanger (4), one end of the first heat exchanger (3) can be communicated to the gas pipe (1) through a first pipe (101), the other end of the first heat exchanger (3) can be communicated to the liquid pipe (2) through a second pipe (102), one end of the second heat exchanger (4) can be communicated to the gas pipe (1) through a third pipe (103), the other end of the second heat exchanger (4) can be communicated to the liquid pipe (2) through a fourth pipe (104), and the first pipe (101) and the fourth pipe (104) are further connected with a fifth pipe (105); In the refrigeration mode, the first heat exchanger (3) and the second heat exchanger (4) are connected in parallel, and the refrigerant enters the first heat exchanger (3) and the second heat exchanger (4) from the liquid pipe (2) respectively, and is discharged from the gas pipe (1) after heat exchange; in the heating mode, the first heat exchanger (3) and the second heat exchanger (4) are connected in parallel, and the refrigerant enters the first heat exchanger (3) and the second heat exchanger (4) from the gas pipe (1) respectively, and is discharged from the liquid pipe (2) after heat exchange; in the dehumidification mode, the first heat exchanger (3) and the second heat exchanger (4) are connected in series, so that the air first passes through the second heat exchanger (4) to evaporate and dehumidify, and then passes through the first heat exchanger (3) to reheat and warm up.

2. The constant temperature dehumidification system according to claim 1, wherein: in the refrigeration mode, the first pipe (101) communicates the gas pipe (1) with one end of the first heat exchanger (3), the second pipe (102) communicates the liquid pipe (2) with the other end of the first heat exchanger (3), the third pipe (103) communicates the gas pipe (1) with one end of the second heat exchanger (4), the fourth pipe (104) communicates the liquid pipe (2) with the other end of the second heat exchanger (4), and the fifth pipe (105) is disconnected; the refrigerant enters the first heat exchanger (3) from the liquid pipe (2) through the second pipe (102), evaporates and cools in the first heat exchanger (3), and then enters the gas pipe (1) through the first pipe (101), and the refrigerant also enters the second heat exchanger (4) from the liquid pipe (2) through the fourth pipe (104), evaporates and cools in the second heat exchanger (4), and then enters the gas pipe (1) through the third pipe (103); In the heating mode, the first pipeline (101) connects the gas pipe (1) with one end of the first heat exchanger (3), the second pipeline (102) connects the liquid pipe (2) with the other end of the first heat exchanger (3), the third pipeline (103) connects the gas pipe (1) with one end of the second heat exchanger (4), the fourth pipeline (104) connects the liquid pipe (2) with the other end of the second heat exchanger (4), and the fifth pipeline (105) is disconnected; the refrigerant enters the first heat exchanger (3) from the gas pipe (1) through the first pipeline (101), condenses and releases heat in the first heat exchanger (3), and then enters the liquid pipe (2) through the second pipeline (102); the refrigerant also enters the second heat exchanger (4) from the gas pipe (1) through the third pipeline (103), and enters the liquid pipe (2) through the fourth pipeline (104) after condensing and releasing heat in the second heat exchanger (4); In the dehumidification mode, the first pipeline (101), the fifth pipeline (105) and the fourth pipeline (104) are connected in sequence, connecting one end of the first heat exchanger (3) with the other end of the second heat exchanger (4); the second pipeline (102) connects the liquid pipe (2) with the other end of the first heat exchanger (3); and the third pipeline (103) connects the gas pipe (1) with one end of the second heat exchanger (4); the refrigerant enters the first heat exchanger (3) from the liquid pipe (2) through the second pipeline (102), condenses and releases heat in the first heat exchanger (3), and then enters the second heat exchanger (4) through the first pipeline (101), the fifth pipeline (105) and the fourth pipeline (104), and then enters the gas pipe (1) through the third pipeline (103) after evaporating and cooling in the second heat exchanger (4).

3. The constant temperature dehumidification system according to claim 1, characterized in that: The first pipeline (101) is further provided with a fourth throttling device (8), and the second pipeline (102) is further provided with a second throttling device (6).

4. The constant temperature dehumidification system according to claim 3, characterized in that: The fourth pipeline (104) is also provided with a first throttling device (5).

5. The constant temperature dehumidification system according to claim 4, characterized in that: One end of the fifth pipeline (105) is connected to the first pipeline (101) and is located between the first heat exchanger (3) and the fourth throttling device (8), and the other end of the fifth pipeline (105) is connected to the fourth pipeline (104) and is located between the second heat exchanger (4) and the first throttling device (5).

6. The constant temperature dehumidification system according to claim 5, characterized in that: The fifth pipeline (105) is also provided with a third throttling device (7).

7. The constant temperature dehumidification system according to claim 6, characterized in that: The first throttling device (5), the second throttling device (6), the third throttling device (7), and the fourth throttling device (8) are electronic expansion valves.

8. The constant-temperature dehumidifying system according to claim 1, wherein: Further comprising a fan (9), the fan (9), the first heat exchanger (3), and the second heat exchanger (4) are located on the same air flow path, and the second heat exchanger (4) is located on the upstream side of the first heat exchanger (3) along the air flow direction.

9. The constant-temperature dehumidifying system according to claim 8, wherein: The fan (9) is located on the upstream side of the second heat exchanger (4) along the air flow direction.

10. An air conditioner characterized by comprising: The constant-temperature dehumidifying system according to any one of claims 1-9.

Images