CN212777664U - Ultralow temperature type cabinet air conditioner - Google Patents

Abstract

The utility model relates to the technical field of cabinet air conditioners, in particular to an ultralow temperature cabinet air conditioner, which comprises a cabinet body, wherein an indoor side cavity and an outdoor side cavity are arranged in the cabinet body, an evaporator is arranged in the indoor side cavity, a condenser is arranged in the outdoor side cavity, a compressor is communicated between the evaporator and the condenser through a pipeline and forms a loop, the condenser comprises more than two parallel condensation flow paths, one end of each condensation flow path is connected with the compressor, the other end of each condensation flow path is connected with the evaporator, a solenoid valve is connected in series between part of the condensation flow paths and the evaporator, when refrigerating is carried out in an ultralow temperature environment, the solenoid valve is turned off, thereby reducing the heat exchange area of the condenser, leading the evaporation side to form effective evaporation, thereby forming effective pressure difference at a return port and an exhaust port of the compressor, rapidly establishing refrigeration circulation even in the ultralow, the pressure at the air outlet of the compressor increases the flow speed of the refrigerant in the flow path, thereby preventing the problem of insufficient oil return of the refrigeration lubricating oil of the compressor.

Description

Ultralow temperature type cabinet air conditioner

Technical Field

The utility model relates to a rack air conditioner technical field, concretely relates to ultralow temperature type rack air conditioner.

Background

The cabinet air conditioner is defined as a device capable of adjusting the temperature, relative humidity, and flow speed of air in an electric control cabinet, and is different from a general air conditioner in structure, objects to be served, and use environment. The cabinet air conditioner is specially designed for the communication field, for example, the heat dissipation problem of outdoor communication cabinets, wireless outdoor cabinet base stations, storage battery cabinets and the like is solved. The electric heating cabinet is mainly used for taking away heat generated by electric energy consumed by electric elements, providing an ideal temperature and humidity environment for the interior of various cabinets, isolating dust and corrosive gas in the external environment, prolonging the service life of the electric elements and improving the operation reliability of a machine system. The product is suitable for an electric control box, communication equipment, a data processing box, a heavy motor equipment control box and the like.

The conventional cabinet air conditioner in the prior art can only achieve the temperature of minus 20 ℃ and also has a refrigeration function, and the refrigeration function cannot be realized in an ultralow temperature environment (such as below minus 40 ℃), because under the ultralow temperature environment, a refrigerant in a condenser at the outdoor side is too fast to condense, the exhaust pressure of a compressor is too low, and meanwhile, the refrigerant in an evaporator at the indoor side cannot be effectively evaporated, so that an effective pressure difference cannot be formed between an air return port and an exhaust port of the compressor, an effective refrigeration cycle cannot be established, and the cabinet air conditioner can trigger a low-pressure alarm to cause that a unit cannot normally operate; meanwhile, in the ultralow temperature environment, the viscosity of the refrigeration lubricant mixed in the refrigerant at the exhaust port of the compressor is high, and the flow rate of the refrigerant in the ultralow temperature environment is low, so that the refrigeration lubricant cannot return to the suction port of the compressor in time, and the service life of the compressor is influenced. In addition, the existing cabinet air conditioner only has a refrigerating function, and the existing cabinet air conditioner does not have a heating function by utilizing a refrigerant.

Disclosure of Invention

There is above-mentioned some technical problem to prior art, the utility model provides an ultralow temperature type rack air conditioner, it can satisfy still can cryogenic demand under the ultra-low temperature environment.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an ultralow temperature type rack air conditioner, including the cabinet body, the internal portion of cabinet is equipped with indoor side cavity and outdoor side cavity, indoor side cavity is equipped with the evaporimeter, outdoor side cavity is equipped with the condenser, through the pipeline intercommunication have the compressor and form the return circuit between evaporimeter and the condenser, the condenser includes the condensation flow path more than two parallelly connected, connect the compressor after each condensation flow path one end mass flow, the evaporimeter is all connected to the other end, and wherein establish ties between partial condensation flow path and the evaporimeter and have the solenoid valve of its break-make of control.

Preferably, the condenser is provided with a subcooling flow path, the condensing flow paths are connected to the evaporator via the subcooling flow path of the condenser after collecting the flow, and the solenoid valve is provided between the condensing flow path and the subcooling flow path.

Preferably, a throttle mechanism is connected to a pipe between the evaporator and the condensation flow path of the condenser.

Preferably, the loop is further connected with a four-way valve, and four ports of the four-way valve are respectively connected with an exhaust port of the compressor, an air pipe inlet of the condenser, an air pipe outlet of the evaporator and an air return port of the compressor.

Preferably, a pipeline between the evaporator and the condenser is connected with a filter, and the filter is provided with an overhauling interface.

Preferably, the compressor is an inverter compressor.

Preferably, each condensation flow path is formed by sequentially connecting a plurality of heat exchange tubes end to end.

Preferably, a water receiving tray is arranged below the evaporator, a drain hose is communicated with the bottom of the water receiving tray, and the drain hose penetrates out of the outdoor side cavity.

The utility model has the advantages that:

the utility model relates to an ultra-low temperature cabinet air conditioner, a condenser comprises more than two parallel condensation flow paths, one end of each condensation flow path is connected with a compressor after collecting flow, the other end is connected with an evaporator, and an electromagnetic valve for controlling the on-off of the condenser is connected in series between part of the condensing flow path and the evaporator, the area of the condenser participating in the circulation is controlled by using the on-off of the electromagnetic valve, the electromagnetic valve is turned off when refrigeration is carried out under the ultralow temperature environment, thereby reducing the heat exchange area of the condenser, leading the refrigerant pipeline to not participate in the heat exchange completely, leading the evaporation side to form effective evaporation, further forming effective pressure difference at the air return port and the exhaust port of the compressor, the refrigeration cycle can be quickly established even in an ultralow-temperature environment, after the electromagnetic valve is turned off, the refrigerant flow path is reduced, the refrigerant flow speed in the flow path is increased due to the same pressure of the exhaust port of the compressor, and the problem of insufficient oil return of the frozen lubricating oil of the compressor in the ultralow-temperature environment can be effectively prevented.

Drawings

Fig. 1 is a schematic structural diagram of a cabinet air conditioner in an embodiment.

Fig. 2 is an exploded view of a cabinet air conditioner in an embodiment.

Fig. 3 is a system schematic diagram of a cabinet air conditioner in an embodiment.

Fig. 4 is a partial enlarged view of fig. 3.

Reference numerals:

an evaporator 1;

the cabinet body 2, an indoor panel 21, a top plate 22, a bottom plate 23, side plates 24 and partition plates 25;

a condenser 3, a condensing flow path 31(32), an electromagnetic valve 33, a compressor 4, a four-way valve 5,

A water receiving tray 6, a drainage hose 7, a filter 8, an overhaul interface 81 and a throttling mechanism 9.

Detailed Description

The present invention will be described in detail with reference to the following embodiments and accompanying drawings.

The cabinet air conditioner of the embodiment is as shown in fig. 1 to 4, and includes a cabinet body 2, an indoor side cavity and an outdoor side cavity are arranged inside the cabinet body 2, the indoor side cavity is provided with an evaporator 1, the outdoor side cavity is provided with a condenser 3, and the evaporator 1 and the condenser 3 are communicated with a compressor 4 through a pipeline to form a circulation loop. The condenser 3 includes two condensation flow paths 31 and 32 connected in parallel, each of which is formed by sequentially connecting a plurality of heat exchange tubes, wherein the condensation flow path 31 is divided into two sections at both ends of the condenser 3. One ends of the condensing flow paths 31 and 32 are connected with the compressor 4 after collecting flow, the other ends are connected with the evaporator 1, and wherein the electromagnetic valve 33 for controlling the on-off of the condensation flow path 32 is connected in series with the evaporator 1, the area of the condenser 3 participating in the circulation is controlled by the on-off of the electromagnetic valve 33, which is beneficial to shutting off the electromagnetic valve 33 when refrigerating in an ultra-low temperature environment, the condensation flow path 32 does not participate in heat exchange, thereby reducing the heat exchange area of the condenser 3, leading the refrigerant pipeline to not completely participate in the heat exchange, leading the evaporation side to form effective evaporation, further forming effective pressure difference at the air return port and the exhaust port of the compressor 4, the refrigeration cycle can be quickly established even in an ultralow-temperature environment, and after the electromagnetic valve is closed, the refrigerant flow path is reduced, the refrigerant flow speed in the flow path is increased by the same pressure of the exhaust port of the compressor 4, so that the problem of insufficient oil return of the refrigeration lubricating oil of the compressor 4 can be effectively prevented. In practice, the number of the condensing flow paths can be multiple, and the electromagnetic valves are arranged on part of the condensing flow paths, so that ultra-low temperature refrigeration in a wider range is realized.

Specifically, the other end of each condensation flow path collects the flow and then flows into a supercooling flow path of the condenser, and finally flows out of the condenser and then is connected with the evaporator through a throttling mechanism. The supercooling flow path has the advantages that the refrigerant is cooled through the condensing flow path and then becomes a gas-liquid mixed refrigerant, subsequent heat exchange is facilitated, the refrigerant enters the supercooling flow path for continuous heat exchange after being collected, at the moment, the two flow paths are combined into one flow path, the flow speed of the refrigerant in the supercooling flow path is increased, the higher the liquefaction ratio of the refrigerant is, the higher the flow speed is, the higher the heat exchange efficiency of the system is, and the larger the energy efficiency ratio is, the more energy is saved.

In this embodiment, the loop is further connected to a four-way valve 5, and four ports of the four-way valve 5 are respectively connected to an exhaust port of the compressor 4, an air pipe inlet of the condenser 3, an air pipe outlet of the evaporator 1, and a return air port of the compressor 4. During use, during refrigeration, a refrigerant flows from an exhaust port of the compressor 4 to the condenser 3 on the outdoor side through the four-way valve 5 and then flows to the evaporator 1 on the indoor side, and then flows back to a return port of the compressor 4 through the four-way valve 5, the four-way valve 5 is reversed during heating, and the refrigerant flows from the exhaust port of the compressor 4 to the evaporator 1 on the indoor side through the four-way valve 5 and then flows to the condenser 3 on the outdoor side, and then flows back to the return port of the compressor 4 through the four-way valve 5. The four-way valve 5 is used for realizing the cooling and heating functions of the cabinet air conditioner. In this embodiment, a water pan 6 is arranged below the evaporator 1, a drain hose 7 is communicated with the bottom of the water pan 6, and the drain hose 7 penetrates through the outdoor side cavity, so that the unsmooth drainage of condensed water under the positive pressure action of the outdoor side fan is avoided.

In this embodiment, a pipeline between the evaporator 1 and the condenser 3 is connected to a throttle mechanism 9, and the throttle mechanism 9 performs a function of reducing the pressure of the refrigerant in the system (reducing the pressure of the medium-temperature high-pressure gas-liquid mixed refrigerant into a low-temperature low-pressure liquid refrigerant). The pipeline between the evaporator 1 and the condenser 3 is also connected with a filter 8, and the filter 8 is provided with an overhaul interface 81. The filter 8 is used for filtering impurities such as welding slag in the refrigerant, and the filter 8 has two interfaces, wherein one interface is used as a maintenance interface 81 for connecting a maintenance valve and can be used for supplementing the refrigerant to a system or carrying out a system pressure test and the like.

In this embodiment, the compressor 4 is a variable frequency compressor, which can effectively reduce the noise of the compressor 4, and meanwhile, the power output is adjustable and more energy-saving. After programming the existing frequency converter, a software engineer realizes the frequency conversion function of the compressor by constructing a computer function module.

In this embodiment, the cabinet body 2 includes an indoor panel 21, a top plate 22, a bottom plate 23 and two side plates 24, which together enclose a chamber, and the top plate 22 and the bottom plate 23 are respectively integrally bent and formed with one side plate 24. The cabinet body 2 further comprises a partition plate 25 for separating the indoor side cavity from the outdoor side cavity, the middle of the partition plate 25 is provided with an inclined slope, the slope can play a role in guiding heat exchange airflow organization of the indoor side and the outdoor side, installation space can be avoided for devices of the indoor side and the outdoor side, and metal flanges used for being tightly and tightly installed with an installation surface in a sealing mode are arranged on the periphery of the cabinet body 2.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. The utility model provides an ultralow temperature type rack air conditioner, includes the cabinet body, and the internal portion of cabinet is equipped with indoor side cavity and outdoor side cavity, and indoor side cavity is equipped with the evaporimeter, and outdoor side cavity is equipped with the condenser, has compressor and return circuit, characterized by through the pipeline intercommunication between evaporimeter and the condenser: the condenser comprises more than two parallel condensation flow paths, one end of each condensation flow path is connected with the compressor after collecting flow, the other end of each condensation flow path is connected with the evaporator, and an electromagnetic valve for controlling the on-off of the condensation flow paths is connected between part of the condensation flow paths and the evaporator in series.

2. The ultra low temperature type cabinet air conditioner as claimed in claim 1, wherein: the condenser is provided with a supercooling flow path, each condensing flow path collects the flow and then is connected with the evaporator through the supercooling flow path, and the electromagnetic valve is arranged between the condensing flow path and the supercooling flow path.

3. The ultra low temperature type cabinet air conditioner as claimed in claim 2, wherein: and a throttling mechanism is connected with a pipeline between the evaporator and a condensation flow path of the condenser.

4. The ultra low temperature type cabinet air conditioner as claimed in claim 1, wherein: the loop is also connected with a four-way valve, and four ports of the four-way valve are respectively connected with an exhaust port of the compressor, an air pipe inlet of the condenser, an air pipe outlet of the evaporator and an air return port of the compressor.

5. The ultra low temperature type cabinet air conditioner as claimed in claim 1, wherein: the pipeline between the evaporator and the condenser is connected with a filter, and the filter is provided with an overhauling interface.

6. The ultra low temperature type cabinet air conditioner as claimed in claim 1, wherein: the compressor is a variable frequency compressor.

7. The ultra low temperature type cabinet air conditioner as claimed in claim 1, wherein: each condensation flow path is formed by sequentially connecting a plurality of heat exchange tubes end to end.

8. The ultra low temperature type cabinet air conditioner as claimed in claim 1, wherein: a water receiving tray is arranged below the evaporator, the bottom of the water receiving tray is communicated with a drainage hose, and the drainage hose penetrates out of the outdoor side cavity.

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