Low-cost low-temperature environment dehumidifier

Abstract

The utility model relates to a dehumidifier, in particular to a low-cost low-temperature environment dehumidifier. The utility model relates to a dehumidifier, and aims to provide a low-cost low-temperature environment dehumidifier which has the characteristics of low cost and good low-temperature environment dehumidification effect. According to the technical scheme, the low-cost low-temperature environment dehumidifier comprises a case, a controller, a compressor, an evaporator, a condenser, a throttling element, a water pan, a water tank and a fan. The compressor, the condenser, the throttling element and the evaporator are sequentially communicated through a pipeline to form a refrigerant circulating flow channel. The throttle valve is characterized in that the throttle element is a throttle pipe; the condenser is communicated with a three-way valve through a liquid discharge pipe, and the three-way valve is communicated with the evaporator through two throttle pipes which are connected in parallel; and the controller is electrically connected with the three-way valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dehumidifier, in particular to a low-cost low-temperature environment dehumidifier. BACKGROUND

[0002] The dehumidifier is also called a moisture-removing machine or a moisture-removing machine, and is widely applied to laboratories, computer rooms, measurement rooms, book rooms, archive rooms, offices, material reserves, food and crop warehouses and other places, so that electronic products, optical instruments, precision equipment and valuable articles can be prevented from being affected by moisture and mildew.

[0003] As shown in Figure 3 , Figure 4 , the dehumidifier mainly comprises a compressor, a heat exchanger, a throttling element, a water collecting tray, a fan, a controller and a shell, and the working principle is that humid air is sucked into the machine by the fan, the water in the air is condensed into water droplets by heat exchange and flows into the water collecting tray, the dry air after treatment is discharged out of the machine, and the indoor humidity is reduced through the above-mentioned circulation.

[0004] The conventional dehumidifier has the following defects:

[0005] The dehumidifier usually adopts a structure of a single condenser and a single evaporator, and the throttling element is usually a capillary tube. In the design, a single working condition (national standard working condition 27 DEG C 60%) is often taken as a standard to perform system matching and debugging, and when the environmental temperature is lower than 18 DEG C, the evaporator of the dehumidifier is very easy to frost, so that the dehumidification capacity is lost.

[0006] For example, in the drying stage of the plant planting process, the user needs to maintain the humidity at 40-50% RH in an environment of about 15 DEG C, so there is a great demand for dehumidification, and the conventional dehumidifier is difficult to meet the application of this condition.

[0007] At present, the dehumidifier that can meet the low-temperature working condition on the market is generally provided with a variable frequency compressor, an electronic expansion valve, a variable frequency fan, a four-way valve and other components, which greatly increases the product cost, and puts forward higher requirements for the control system, and is not suitable for general users to select. UTILITY MODEL CONTENTS

[0008] The utility model aims at overcoming the defects in the above-mentioned background technology, and provides a low-cost low-temperature environment dehumidifier, which has the characteristics of low cost and good dehumidification effect in a low-temperature environment.

[0009] The technical scheme of the utility model is:

[0010] A low-cost low-temperature environment dehumidifier, comprising a cabinet, a controller, a compressor, an evaporator, a condenser, a throttling element, a water pan, a water tank, and a fan; the compressor, the condenser, the throttling element, and the evaporator are sequentially connected through pipelines to form a channel for circulation of refrigerant; characterized in that: the throttling element is a throttling pipe; the condenser is connected to a three-way valve through a drain pipe, and the three-way valve is connected to the evaporator through two parallel throttling pipes; and the controller is electrically connected to the three-way valve.

[0011] The flow ratio of the two throttling pipes is 1:2.

[0012] The fan is a variable frequency fan.

[0013] The water pan is arranged below the evaporator, and the water pan is connected to the water tank through a drain pipe.

[0014] The evaporator, the condenser, and the fan are sequentially arranged between the air inlet and the air outlet of the cabinet.

[0015] A filter screen is further arranged between the air inlet of the cabinet and the evaporator.

[0016] The dehumidifier has the advantages that:

[0017] The dehumidifier adopts a combination mode of double throttling pipes in parallel and a variable frequency fan. In a normal temperature environment, only one throttling pipe is opened and the rotating speed of the variable frequency fan is reduced, so that the evaporation temperature is reduced, the dehumidification capacity is increased, and the energy efficiency is improved. In a low-temperature environment, both throttling pipes are fully opened to increase the evaporation temperature, and the rotating speed of the variable frequency fan is increased to increase the load of the evaporator, so that the dehumidification effect is ensured. Therefore, the dehumidifier can effectively expand the application range of the dehumidifier in a low-temperature environment while ensuring low cost, and further improve the reliability and energy efficiency of the dehumidifier. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a front view structural schematic diagram of the dehumidifier.

[0019] Figure 2 is a connection relationship schematic diagram of the dehumidifier.

[0020] Figure 3 is a front view structural schematic diagram of the prior art.

[0021] Figure 4 is a connection relationship schematic diagram of the prior art.

[0022] REFERENCE SIGNS:

[0023] Filter screen 1, evaporator 2, water pan 3, air return pipe 4, drain pipe 5, water tank 6, compressor 7, exhaust pipe 8, condenser 9, fan 10, three-way valve 11, throttling element 12. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0025] like Figure 1 As shown, a low-cost low-temperature environment dehumidifier includes a casing, a controller, a compressor 7, an evaporator 2, a condenser 9, a throttling element 12, a water tray 3, a water tank 6, and a fan 10.

[0026] The chassis is equipped with an air inlet and an air outlet, with the evaporator, condenser, and fan arranged sequentially between them. A filter screen 1 is also installed between the air inlet and the evaporator. The air inlet side of the fan is in close contact with the condenser, and the air outlet side is in close contact with the air outlet. A water collection tray 3 is located below the evaporator, and the water collection tray is connected to a water tank via a drain pipe 5. The controller is electrically connected to the compressor and the fan.

[0027] The compressor, condenser, throttling element, and evaporator are the main components of the dehumidifier refrigeration system. The compressor, condenser, throttling element, and evaporator are connected in sequence through pipelines to form a refrigerant circulation channel: the compressor's exhaust port is connected to the condenser's inlet through exhaust pipe 8, the condenser's outlet is connected to the evaporator's inlet through the throttling element, and the evaporator's outlet is connected to the compressor's suction port through return pipe 4, thus forming a circulation channel.

[0028] The improvement of this embodiment is as follows:

[0029] A three-way valve 11 is provided between the condenser and the throttling element. The controller is electrically connected to the three-way valve. The throttling element includes two throttling tubes, which are arranged in parallel.

[0030] The compressor, condenser, three-way valve, two expansion tubes, and evaporator are connected sequentially through pipelines to form a refrigerant circulation channel. The compressor is connected to the inlet of the three-way valve through the exhaust pipe 8. The two outlets of the three-way valve are respectively connected to one end of the two expansion tubes, and the other ends of the two expansion tubes are simultaneously connected to the inlet of the evaporator.

[0031] Under normal operating conditions, opening only one of the expansion tubes can lower the evaporation temperature. Under low operating conditions, opening both expansion tubes simultaneously can increase the evaporation temperature.

[0032] The flow ratio of the two throttling pipes is different, preferably 1:2. Because the flow ratio is different, it can be selected according to actual requirements, in normal temperature working condition, the smaller flow throttling pipe is opened, or the larger flow throttling pipe is opened, in low temperature working condition, both throttling pipes are fully opened, so there are three kinds of use modes, which can adapt to various application environments.

[0033] The fan is a variable frequency fan. The speed of the variable frequency fan is determined according to the working condition, in normal temperature working condition, the evaporation temperature is reduced by reducing the speed, in low temperature working condition, the evaporator load is increased by increasing the speed.

[0034] The utility model adopts the combination mode of double throttling pipes in parallel and variable frequency fan to improve the evaporation temperature by reducing the throttling pipe pressure difference and increasing the load. The specific working principle is as follows:

[0035] 1. In normal temperature environment working condition, one throttling pipe can be selected to be opened (three-way valve opens an outlet), to obtain lower evaporation temperature and increase the dehumidification capacity. The variable frequency fan appropriately reduces the speed to reduce the air volume, so as to reduce the evaporation temperature and increase the dehumidification capacity, thereby improving the overall energy efficiency.

[0036] 2. In low temperature environment working condition (for example, temperature 15℃ / humidity 50%RH, dew point 4.7℃), in order to make the air continue to condense water after flowing through the evaporator, the evaporation temperature needs to be controlled at about 0 degrees. The low temperature environment makes the overall pressure of the system low, and the evaporation temperature also sharply decreases to about-15℃, so the evaporation temperature needs to be increased.

[0037] At this time, two throttling pipes are opened. Because the throttling pipe is a fixed pressure difference, the evaporation pressure can be increased by reducing the pressure difference of the refrigerant inlet and outlet after the parallel throttling pipes, thereby increasing the evaporation temperature. At the same time, the variable frequency fan increases the speed to increase the air volume, so as to increase the load of the evaporator and increase the heat absorbed by the refrigerant in the evaporator, thereby increasing the evaporation temperature and preventing frost formation. In this way, the evaporator can continue to condense water to meet the dehumidification requirements in low temperature working condition.

[0038] The components of the utility model can be obtained from the market.

[0039] The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms, and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive.

Claims

1. A low-cost low-temperature dehumidifier, comprising a chassis, a controller, a compressor (7), an evaporator (2), a condenser (9), a throttling element (12), a drip tray (3), a water tank (6), and a fan (10); wherein the compressor, condenser, throttling element, and evaporator are sequentially connected by pipelines to form a refrigerant circulation channel; characterized in that: The throttling element is a throttling pipe; the condenser is communicated with a three-way valve (11) through a liquid discharge pipe (13), the three-way valve is communicated with the evaporator through two parallel throttling pipes; and the controller is electrically connected with the three-way valve.

2. A low cost, low temperature, environmental dehumidifier according to claim 1, characterised in that: The flow ratio of the two throttling pipes is 1:

2.

3. A low cost, low temperature, environmental dehumidifier according to claim 2, wherein: The fan is a variable frequency fan.

4. A low cost, low temperature, environmental dehumidifier according to claim 3, wherein: The water pan is arranged below the evaporator; and the water pan is communicated with a water tank through a drain pipe (5).

5. A low cost, low temperature, environmental dehumidifier according to claim 4, characterised in that: The evaporator, the condenser and the fan are sequentially arranged between the air inlet and the air outlet of the case.

6. A low cost, low temperature, environmental dehumidifier according to claim 5, wherein: A filter screen (1) is further arranged between the air inlet of the case and the evaporator.

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