CN213020046U

CN213020046U - Novel low-temperature dehumidifier

Info

Publication number: CN213020046U
Application number: CN201920081616.4U
Authority: CN
Inventors: 程鹏; 何双军; 郭洪振; 邱业岭; 庄广明; 高松; 王永卫
Original assignee: Shandong Taishan Pumped Storage Power Station Co Ltd
Current assignee: Shandong Taishan Pumped Storage Power Station Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2021-04-20
Anticipated expiration: 2029-01-17

Abstract

The utility model discloses a novel low-temperature dehumidifier, the output end of a compressor is communicated with the input end of a fluorine heating pipe through a first pipeline, the output end of the fluorine heating pipe is communicated with the input end of an expansion valve through a second pipeline, the output end of the expansion valve is connected with a third pipeline, the input end of a first liquid separator is communicated with the third pipeline through a fourth pipeline, an evaporation solenoid valve is arranged on the fourth pipeline, the input end of a second liquid separator is communicated with the third pipeline through a fifth pipeline, the output end of the first liquid separator is connected with the input end of an evaporator through a sixth pipeline, the output end of the second liquid separator is connected with the input end of the evaporator through a seventh pipeline, the output end of the evaporator is communicated with the input end of a gas-liquid separator through an eighth pipeline, the expansion valve comprises a temperature sensing bag, the temperature sensing bulb is arranged on the eighth pipeline.

Description

Novel low-temperature dehumidifier

Technical Field

The utility model relates to a refrigeration dehumidifier especially relates to a novel low temperature dehumidifier.

Background

The conventional refrigeration cycle of a low temperature dehumidifier is: the constant-frequency compressor (compressed refrigerant) → the fluorine heating pipe (the refrigerant is cooled to normal-temperature liquid, and the air is heated to raise the temperature) → the thermostatic expansion valve (the refrigerant is expanded to a low-temperature low-pressure vapor-liquid mixed state) → the liquid separator (the refrigerant in the vapor-liquid mixed state is evenly distributed to each branch circuit) → the evaporator (the low-temperature low-pressure liquid refrigerant evaporates, so that the water vapor in the air is cooled and condensed to liquid water, and the dehumidification effect is achieved. The refrigeration cycle mode is simple, the operation is stable and reliable under the normal temperature working condition (18-32 ℃), but when the refrigeration cycle mode is operated under the low temperature working condition (5-32 ℃), the evaporator cannot operate under the optimal working condition because the evaporation area is not variable and the regulating capacities of the fixed-frequency compressor and the thermal expansion valve are limited: if the evaporation area is matched according to the normal-temperature working condition, the evaporation area is smaller when the evaporator operates under the low-temperature working condition, the evaporation temperature is lower, and the frosting is easy to occur; if the evaporation area is matched according to the low-temperature working condition, the phenomenon that the superheat degree is too large and the low pressure is too high easily occurs when the evaporation area operates under the normal-temperature working condition, so that high-pressure alarm occurs when the high pressure is too high.

In addition, when the dehumidifier runs under a low-temperature working condition, the phenomenon that the unit can not frost (the air inlet dry bulb temperature is 5 ℃, the wet bulb temperature is 2.1 ℃, and the dew point temperature is-1.9 ℃) is avoided, when the evaporator frosts to a certain condition, the unit needs to defrost, otherwise, the unit is easy to break down. There are three types of defrosting methods commonly used today. The first is heat pump defrosting, which makes refrigerant circulate reversely through a four-way reversing valve to achieve the purpose of hot gas defrosting. The second is internal heat defrosting, in which a heating device (such as an electric heating tube) is arranged in the evaporator to heat the evaporator to achieve the purpose of defrosting, but the compressor needs to be stopped in the defrosting process. Although defrosting is fast, the method consumes much energy. The third mode is blowing defrosting after stopping the machine, at the moment, the compressor stops, the fan continues to operate, and frost on the evaporator is blown by air, but the defrosting speed is too low and the efficiency is lower.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a novel low-temperature dehumidifier, which is provided with an evaporation solenoid valve on a fourth pipeline through being provided with a first liquid separator and a second liquid separator, and can increase the evaporation area and effectively improve the evaporation temperature when the working condition is at low temperature, thereby reducing the possibility of frosting of an evaporator.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a novel low-temperature dehumidifier comprises a compressor, a fluorine heating pipe, an expansion valve, a first liquid separator, a second liquid separator, an evaporator and a gas-liquid separator, wherein the output end of the compressor is communicated with the input end of the fluorine heating pipe through a first pipeline, the output end of the fluorine heating pipe is communicated with the input end of the expansion valve through a second pipeline, the output end of the expansion valve is connected with a third pipeline, the input end of the first liquid separator is communicated with the third pipeline through a fourth pipeline, an evaporation electromagnetic valve is arranged on the fourth pipeline, the input end of the second liquid separator is communicated with the third pipeline through a fifth pipeline, the output end of the first liquid separator is connected with the input end of the evaporator through a sixth pipeline, the output end of the second liquid separator is connected with the input end of the evaporator through a seventh pipeline, and the output end of the evaporator is communicated with the input end of the gas-liquid separator through an eighth pipeline, the expansion valve comprises a temperature sensing bulb, the temperature sensing bulb is arranged on the eighth pipeline, and the output end of the gas-liquid separator is communicated with the input end of the compressor through a ninth pipeline.

The defrosting device further comprises a defrosting solenoid valve, wherein the output end of the compressor is communicated with the defrosting solenoid valve through a tenth pipeline, and the defrosting solenoid valve is communicated with the third pipeline through an eleventh pipeline.

Furthermore, fins are arranged in the evaporator, a defrosting temperature probe is arranged on the fins, and a pressure difference probe is arranged on the evaporator.

The defrosting device further comprises a controller, wherein the defrosting temperature probe and the pressure difference probe are respectively connected with the controller, and the defrosting electromagnetic valve and the evaporation electromagnetic valve are respectively connected with the controller.

Further, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline, the sixth pipeline, the seventh pipeline, the eighth pipeline, the ninth pipeline, the tenth pipeline and the eleventh pipeline are all copper pipelines.

Compared with the prior art, the utility model has the advantages that the output end of the compressor is communicated with the input end of the fluorine heating pipe through the first pipeline, the output end of the fluorine heating pipe is communicated with the input end of the expansion valve through the second pipeline, the output end of the expansion valve is connected with the third pipeline, the input end of the first liquid separator is communicated with the third pipeline through the fourth pipeline, the fourth pipeline is provided with an evaporation solenoid valve, the input end of the second liquid separator is communicated with the third pipeline through the fifth pipeline, the output end of the first liquid separator is connected with the input end of the evaporator through the sixth pipeline, and the output end of the second liquid separator is connected with the input end of the evaporator through the seventh pipeline; under the normal-temperature working condition, the evaporation electromagnetic valve is closed, the refrigerant is distributed to a part of pipelines of the evaporator through the second liquid separator for evaporation heat exchange, and the evaporation area is small at the moment and is suitable for running under the normal-temperature working condition; when the evaporator is in a low-temperature working condition, the evaporation electromagnetic valve is opened, the refrigerant is distributed to all pipelines of the evaporator through the first liquid separator and the second liquid separator for evaporation and heat exchange, the evaporation area is large, the evaporation temperature can be effectively increased, and the possibility of frosting of the evaporator is reduced.

Drawings

The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention.

In the figure: 11-compressor, 12-fluorine heating pipe, 13-expansion valve, 14-evaporation solenoid valve, 15-first liquid separator, 16-second liquid separator, 17-evaporator, 18-gas-liquid separator, 19-defrosting solenoid valve, 21-first pipeline, 22-second pipeline, 23-third pipeline, 24-fourth pipeline, 25-fifth pipeline, 26-sixth pipeline, 27-seventh pipeline, 28-eighth pipeline, 29-ninth pipeline, 210-tenth pipeline, 211-eleventh pipeline, 131-temperature sensing bag, 171-defrosting temperature probe, 172-differential pressure probe.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, a novel low-temperature dehumidifier includes a compressor 11, a fluorine heating pipe 12, an expansion valve 13, a first liquid separator 15, a second liquid separator 16, an evaporator 17 and a gas-liquid separator 18, wherein an output end of the compressor 11 is communicated with an input end of the fluorine heating pipe 12 through a first pipeline 21, an output end of the fluorine heating pipe 12 is communicated with an input end of the expansion valve 13 through a second pipeline 22, an output end of the expansion valve 13 is connected with a third pipeline 23, an input end of the first liquid separator 15 is communicated with the third pipeline 23 through a fourth pipeline 24, the fourth pipeline 24 is provided with an evaporation solenoid valve 14, an input end of the second liquid separator 16 is communicated with the third pipeline 23 through a fifth pipeline 25, an output end of the first liquid separator 15 is connected with an input end of the evaporator 17 through a sixth pipeline 26, an output end of the second liquid separator 16 is connected with an input end of the evaporator 17 through a seventh pipeline 27, the output of the evaporator 17 communicates with the input of the gas-liquid separator 18 via an eighth conduit 28,

specifically, the expansion valve 13 includes a bulb 131, the bulb 131 is disposed on the eighth pipe 28, and the bulb 131 can adjust the opening degree of the expansion valve 13 according to the temperature of the eighth pipe 28, so that the liquid supply amount can be adjusted, and the evaporation temperature and the evaporation pressure can be adjusted.

Specifically, the output end of the gas-liquid separator 18 communicates with the input end of the compressor 11 through a ninth conduit 29.

Specifically, a defrost solenoid valve 19 is further included, the output of the compressor 11 is communicated with the defrost solenoid valve 19 through a tenth pipe 210, and the defrost solenoid valve 19 is communicated with the third pipe 23 through an eleventh pipe 211.

Under the normal-temperature working condition, the evaporation electromagnetic valve 14 is closed, the refrigerant is distributed to a part of pipelines of the evaporator 17 through the second liquid separator 16 for evaporation heat exchange, and the evaporation area is small at the moment, so that the evaporator is suitable for running under the normal-temperature working condition; under the low-temperature working condition, the evaporation electromagnetic valve 14 is opened, the refrigerant is distributed to all the pipelines of the evaporator 17 through the first liquid separator 15 and the second liquid separator 16 for evaporation and heat exchange, at the moment, the evaporation area is large, the evaporation temperature can be effectively increased, and therefore the possibility of frosting of the evaporator 17 is reduced.

Specifically, a fin is arranged in the evaporator 17, a defrosting temperature probe 171 is arranged on the fin, a pressure difference probe 172 is arranged on the evaporator 17, the defrosting temperature probe 171 is used for measuring the temperature of the fin, and the pressure difference probe 172 is used for measuring the pressure difference of the evaporator 17, preferably, the present embodiment further includes a controller, the defrosting temperature probe 171 and the pressure difference probe 172 are respectively connected with the controller, and the defrosting solenoid valve 19 and the evaporation solenoid valve 14 are respectively connected with the controller. When the temperature of the fins is lower than 0 ℃ and the pressure difference of the evaporator 17 is greater than a set value, the evaporator 17 is in a frosting state, the controller simultaneously starts the defrosting electromagnetic valve 19 and the evaporating electromagnetic valve 14, part of high-pressure and high-temperature refrigerant gas bypasses the expansion valve 13, then is mixed with the low-temperature and low-pressure refrigerant of the main channel and then is redistributed into the evaporator 17, the pressure and the temperature of the refrigerant (gas-liquid two-phase) entering the evaporator 17 are improved, and the purpose of hot gas defrosting is achieved.

Specifically, the first pipe 21, the second pipe 22, the third pipe 23, the fourth pipe 24, the fifth pipe 25, the sixth pipe 26, the seventh pipe 27, the eighth pipe 28, the ninth pipe 29, the tenth pipe 210, and the eleventh pipe 211 are all copper pipes.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims

1. A novel low temperature dehumidifier which is characterized in that: including compressor (11), fluorine heating pipe (12), expansion valve (13), first knockout (15), second knockout (16), evaporimeter (17) and vapour and liquid separator (18), the output of compressor (11) through first pipeline (21) with the input intercommunication of fluorine heating pipe (12), the output of fluorine heating pipe (12) through second pipeline (22) with the input intercommunication of expansion valve (13), the output of expansion valve (13) is connected with third pipeline (23), the input of first knockout (15) through fourth pipeline (24) with third pipeline (23) intercommunication, be provided with evaporation solenoid valve (14) on fourth pipeline (24), the input of second knockout (16) through fifth pipeline (25) with third pipeline (23) intercommunication, the output of first knockout (15) through sixth pipeline (26) with the input of evaporimeter (17) is connected The output end of the second liquid separator (16) is connected with the input end of the evaporator (17) through a seventh pipeline (27), the output end of the evaporator (17) is communicated with the input end of the gas-liquid separator (18) through an eighth pipeline (28), the expansion valve (13) comprises a temperature sensing bulb (131), the temperature sensing bulb (131) is arranged on the eighth pipeline (28), and the output end of the gas-liquid separator (18) is communicated with the input end of the compressor (11) through a ninth pipeline (29).

2. The novel low-temperature dehumidifier of claim 1, wherein: the first pipeline (21), the second pipeline (22), the third pipeline (23), the fourth pipeline (24), the fifth pipeline (25), the sixth pipeline (26), the seventh pipeline (27), the eighth pipeline (28), the ninth pipeline (29) and the tenth pipeline (210) are all copper pipelines.