CN201401876Y - Miniature DC air conditioner cooler - Google Patents

Abstract

A miniature direct current air conditioner cooler comprises a shell unit, a refrigerant circulating system and a control system. The shell unit comprises a load air inlet, a load air outlet, a heat dissipation air inlet and a heat dissipation air outlet. The refrigerant circulating system comprises a micro direct-current compressor controlled by the control system, a condenser, an expander, an evaporator and a direct-current evaporation circulating fan which are connected. The evaporator is adjacent to the load air inlet, the straight-flow evaporation circulating fan brings load gas into the evaporator from the load air inlet and brings the load gas out of the load air outlet, and the condenser is adjacent to the heat dissipation air outlet. The miniature direct current air conditioner cooler is small in size, easy to maintain the required temperature of load gas, and has the effects of dehumidification function, high performance, high reliability and stability.

Description

Micro DC air conditioner cooler

technical field

The utility model relates to a cooling machine, in particular to a miniature DC air-conditioning cooling machine.

Background technique

As machine tools continue to develop toward multi-axial and high-precision trends, and at the same time increase the overall complexity of machine tools, in order to provide users with more user-friendly operating conditions, machine tool manufacturers design a large number of graphics on the screen of the control display Simultaneous explanation is carried out in order to allow the operator to understand the condition of the machine more easily through detailed use information, and to grasp the changes in the processing process and the processing results at any time.

However, because the screen needs to display a large number of graphics, the heat generated by the control display also increases, which greatly increases the failure rate of the control display. In order to solve the problem of controlling the heat generated by the display and cooperating with the limited space provided by the machine tool, the previous technology only used a small fan as a heat sink and used forced convection to dissipate heat.

But this fan has the following missing:

1. With the increasing amount and complexity of graphics displayed on the screen, it is difficult for the above-mentioned heat sink to maintain and control the required temperature of the display.

2. Using a fan as a heat sink has no dehumidification function, so that the electronic components in the control display may easily fail due to high humidity.

Another conventional cooling technology for control displays of machine tools uses an electronic thermoelectric chip as a heat sink, which is based on an application of the Peltier effect, when DC power passes through the thermoelectric chip. When the n-type and p-type semiconductor materials are used, the ceramic surface on both sides of the thermoelectric chip will generate a temperature difference, and use this temperature difference to remove the heat generated by the control display of the machine tool, but the electronic thermoelectric chip still has the following defects:

1. At present, the coefficient of performance (coefficient of performance, COP) of commercially available electronic thermoelectric chips is still too low (COP is less than 0.7), and the heat dissipation efficiency is still not good enough.

2. Since the electronic thermoelectric chip often needs to use a heat sink (such as an aluminum heat sink) to remove the heat from the hot end of the thermoelectric chip, even if thermal paste is applied between the thermoelectric chip and the heat sink, there will still be a gap between the two. A considerable degree of contact thermal resistance leads to poor cooling and heat dissipation at the cold end of the electronic thermoelectric chip, and it is even easy to burn out due to the high temperature of the hot end of the thermoelectric chip.

Utility model content

The purpose of the utility model is to provide a high-performance and stable miniature DC air-conditioning cooler that is easy to maintain and control the required temperature of the display, and has a dehumidification function.

The utility model miniature DC air-conditioning cooler comprises a shell unit, a refrigerant circulation system and a control system, and is characterized in that:

The shell unit includes a load shell and a heat dissipation shell in opposite directions, and the inner surface of the load shell cooperates with the inner surface of the heat dissipation shell to define a chamber. The load case has a load air inlet and a load air outlet formed on an inner surface of the load case and extended to an outer surface, and the heat dissipation case has a load air outlet formed on an inner surface of the heat dissipation case and extended to an outer surface A cooling air inlet and a cooling air outlet.

The refrigerant circulation system is set in the chamber and includes a once-through evaporative circulation fan, a direct-flow condensing circulation fan, a refrigerant, an insulating cover, a plurality of connecting pipes, and connected pipes for the refrigerant to circulate in sequence. A mini DC compressor, a condenser, a filter, an expander and an evaporator. The evaporator has an evaporating fin tube and a drain pan, the evaporator is adjacent to the load air inlet, and the direct-flow evaporative circulation fan brings the load gas after absorbing the heat from the control display of the machine tool into the air inlet from the load air inlet. The evaporator exchanges heat with the evaporating fin tube of the evaporator, and then directly brings the load gas out of the load gas outlet.

During the heat exchange process, the refrigerant in the evaporating fin tube is vaporized by receiving the heat of the load gas, and the temperature and humidity of the load gas are both reduced. The condenser is adjacent to the heat dissipation outlet, and a heat dissipation gas enters the condenser from the heat dissipation air inlet, and performs forced convection heat dissipation on the high temperature and high pressure refrigerant in the condenser, and at the same time liquefies the refrigerant, and then the heat dissipation gas directly flows from the heat dissipation air outlet flow out. The insulating cover is located between the evaporator and the condenser, which can prevent the load gas from contacting with the heat dissipation gas and affect the heat exchange effect between the load gas and the evaporating fin tube. The control system measures a current temperature of the load inlet and compares it with a preset required temperature to control the speed of the micro DC compressor to automatically control the cooling and heat dissipation capacity (capacity) of the micro DC air conditioner cooler , while controlling the temperature precisely.

The beneficial effect of the utility model is that the miniature DC air-conditioning cooler adopts the configuration of the miniature DC compressor and other components, so that the occupied space is relatively small, so it is suitable for the control display of the machine tool as a high-performance cooling and heat dissipation equipment (or used in other small spaces), and then it is easy to maintain and precisely control the required temperature of the control display. At the same time, it has a dehumidification function, which can prevent the electronic parts in the control display from malfunctioning due to excessive humidity, and promote the control display of the machine tool. High reliability and stable operation can be achieved.

Description of drawings

Fig. 1 is a three-dimensional combination diagram, illustrates a preferred embodiment of the utility model miniature DC air conditioner cooler;

Fig. 2 is a three-dimensional exploded view of this preferred embodiment, wherein, omits a filter and part of connecting pipe of this miniature DC air-conditioning cooler among the figure;

Fig. 3 is a side view sectional schematic diagram of this preferred embodiment, wherein, omits some elements of a shell unit of this miniature DC air-conditioning cooler among the figure, and the connection pipe of this filter and part is represented with phantom line;

Fig. 4 is a block flow diagram of this preferred embodiment, illustrates a control system of this miniature DC air conditioner cooler, and a control unit of this control system is the form of single output; And

Figure 5 is a schematic block flow diagram illustrating that the control unit is in the form of multiple outputs.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail:

Referring to Fig. 1, Fig. 2, Fig. 3, the preferred embodiment of the miniature DC air conditioner cooling machine of the present utility model is suitable for the control display (not shown) of a machine tool to carry out cooling and heat dissipation work, and includes a housing unit 3, a refrigerant Circulatory system 4 and a control system 5.

The housing unit 3 includes a load case 31 and a heat dissipation case 32 in opposite directions, two upright and opposite side walls 33 and a filter 34 . The load shell 31 has a load air outlet 311 and a load air inlet 312 formed on an inner surface of the load shell 31 and extending to an outer surface. The heat dissipation shell 32 has a heat dissipation air inlet 321 and a heat dissipation air outlet 322 formed on an inner surface of the heat dissipation shell 32 and extending to an outer surface. The load air outlet 311 is located above the load air inlet 312 , the heat dissipation air outlet 322 is located above the heat dissipation air inlet 321 , and the filter 34 is disposed on the heat dissipation air inlet 321 . Both sides of each side wall 33 are respectively connected to the load case 31 and the heat dissipation case 32 , and the inner wall surface of the side wall 33 , the inner surface of the load case 31 and the inner surface of the heat dissipation case 32 cooperate to define a chamber 35 .

The refrigerant circulation system 4 is arranged in the chamber 35, and includes a once-through evaporating circulation fan 41, a once-through condensing circulation fan 42, refrigerant (not shown), an insulating cover 43, a plurality of connecting pipes 44, a Micro DC compressor 45, a condenser 46, a filter 47, an expander 48 and an evaporator 49. The connecting pipe 44 connects the micro-DC compressor 45, condenser 46, filter 47, expander 48, evaporator 49 and the micro-DC compressor 45 in series in sequence, and the refrigerant will circulate inside in sequence. The mini DC compressor 45 is of brushless design and can increase the pressure of the gaseous refrigerant. The condenser 46 condenses the gaseous refrigerant into a liquid through the DC condensing circulation fan 42. The filter 47 absorbs water vapor and filters it. For the refrigerant impurity, the expander 48 is made of copper capillary, and uses the friction effect to reduce the pressure of the liquid refrigerant, and the liquid refrigerant evaporates into a gaseous refrigerant in the evaporator 49, and then flows into the micro DC compressor Machine 45 forms a refrigerant circulation system 4.

The insulating cover 43 is located between the evaporator 49 and the condenser 46 , and simultaneously covers the load air outlet 311 , the load air inlet 312 , the once-through evaporative circulation fan 41 and the evaporator 49 . The evaporator 49 is adjacent to the load air inlet 312 and above the micro DC compressor 45 .

The control display of the machine tool can discharge hot load gas (air), the direct-flow evaporative circulation fan 41 is opposite to the load air outlet 311, and is located above the evaporator 49, and the load gas is discharged from the load air inlet 312 is brought into the evaporator 49, and taken out of the load air outlet 311, and then flows back to the control display of the machine tool. An evaporation fin tube 491 is formed on the outer surface of the evaporator 49, and a drain pan 492 is formed on the bottom surface. When the load gas contacts the evaporation fin tube 491 for heat exchange, the temperature and humidity will be reduced, and the moisture in the load gas will condense into water. And gather in the drain pan 492 , so the temperature and humidity of the load gas when it leaves the load gas outlet 311 are lower than the temperature and humidity of the load gas when it enters the load air inlet 312 .

The condenser 46 is adjacent to the heat dissipation air outlet 322, and the direct-flow condensation circulation fan 42 is opposite to the heat dissipation air outlet 322, and is positioned between the condenser 46 and the heat dissipation air outlet 322, and heats gas (air) from the heat dissipation The air inlet 321 is brought into the condenser 46, and then the heat dissipation air outlet 322 is brought out. When the heat dissipation gas contacts the condenser 46, it will take away the heat of the refrigerant and condense the refrigerant into a liquid state. The temperature of the air outlet 322 is higher than the temperature of the heat dissipation inlet 321 .

Referring to FIG. 4 , the control system 5 includes a control unit 51 , a power supply 52 , a driver 53 , a sensor 54 and a signal converter 55 . The control unit 51 has a temperature setting part 511 for inputting the required temperature, a comparator 512 electrically connected to the temperature setting part 511, a controller 513 electrically connected to the comparator 512 and the driver 53, and a The display panel 514 of the controller 513 is electrically connected. The power supply 52 is electrically connected to the driver 53 and provides a DC voltage to the driver 53. The sensor 54 is adjacent to the load inlet 312. The signal converter 55 is electrically connected to the sensor 54 and the comparator. 512, and pass a current temperature sensed by the sensor 54 to the comparator 512, the temperature setting part 511 passes the required temperature to the comparator 512, and the comparator 512 compares the current temperature with the required temperature The difference signal is sent to the controller 513, the driver 53 is electrically connected and drives the miniature DC compressor 45 according to the signal provided by the controller 513 logic operation, so that the miniature DC compressor 45 can run at a suitable speed to achieve The purpose of precise temperature control.

For example: the user can input 35°C from the temperature setting part 511 as the preset temperature, when the current temperature sensed by the sensor 54 is 35.5°C, the controller 513 will control the driver 53, and the driver 53 will The mini DC compressor 45 will run at a normal speed to achieve a normal cooling effect. When the current temperature sensed by the sensor 54 is 36.5°C (the difference signal becomes larger), the controller 513 will control the driver 53, and the driver 53 will increase the rotating speed of the micro DC compressor 45 to increase The cooling and heat dissipation effect of the miniature DC air conditioner cooler.

In summary, the utility model miniature DC air-conditioning cooler has the following beneficial effects:

1. The volume of the micro DC compressor 45 is quite small (about 360 cm3), so that the refrigerant circulation system 4 can be miniaturized, and the overall appearance can be compacted, so that the micro DC air conditioner cooler is suitable for installation and application to the machine tool The control display, or other small spaces, and the load gas is cooled by means of refrigerant circulation, so the cooling capacity is better than that of the previous fan or electronic thermoelectric chip.

2. When the load gas is cooled by means of refrigerant circulation, it also has the effect of dehumidification. The load gas is drier than when the fan cooling method is used in the past, so it can prevent the electronic parts in the control display of the machine tool from being too high due to humidity And malfunction.

3. The coefficient of performance (COP greater than 2.0) of the micro DC air-conditioning cooler is obviously better than that of the previous electronic thermoelectric chip radiator (COP is less than 0.8), so the cooling efficiency is good.

4. The micro DC air-conditioning cooler will not cause chip overheating and burning, and the cooling and heat dissipation process is safe and stable, with high reliability.

5. The motor efficiency of the miniature DC compressor 45 is much higher (10%-15%) than the previous AC compressors, which has quite positive significance for energy saving and carbon reduction.

6. The sensor 54 of the micro DC air conditioner cooler can immediately measure the current temperature of the load inlet 312, and compare it with the preset required temperature of the temperature setting part 511, and then use the compared difference signal to Controlling the rotating speed of the mini DC compressor 45 achieves the beneficial effect of precise temperature control.

It is worth mentioning that the control unit 51 of the above-mentioned embodiment is a single-output mode, while FIG. 5 shows that the control unit 51 is changed to a multi-output mode. Once-through condensing circulation fan 42, and control the rotating speed of this once-through evaporative circulation fan 41 and this once-through condensing circulation fan 42, thereby, if this miniature direct current compressor 45 has reached maximum output capacity (maximum rotating speed), can improve The speed of the direct-flow evaporative circulation fan 41 and the direct-flow condensation circulation fan 42 is to increase the air volume, and further enhance the cooling and heat dissipation capability of the miniature direct-current air-conditioning cooler to the control display of the machine tool.

Claims (6)

1. a minisize dc air-conditioning cooler comprises a housing unit, a coolant circulating system and a control system, it is characterized in that:

Described housing unit comprises a load shell and heat radiation shell that is reverse, the inner surface of described load shell defines a room with common cooperation of the inner surface of described heat radiation shell, described load shell has a load air inlet and load gas outlet that is formed at inner surface of described load shell and extends to an outer surface, and described heat radiation shell has a heat radiation air inlet and heat radiation gas outlet that is formed at inner surface of described heat radiation shell and extends to an outer surface;

Described coolant circulating system is arranged in the described room, and comprise single flow vaporization cycle fan, a single flow condensation cycle fan, refrigerant, an isolated cover, and be connected and for described refrigerant in regular turn at a minisize dc compressor of interior circulation, a condenser, a filter, an expander and an evaporimeter, described evaporimeter has an evaporation fin pipe and a drain pan, the contiguous described load air inlet of described evaporimeter, described single flow vaporization cycle fan is brought supporting gas into described evaporimeter from described load air inlet, and take described load gas outlet out of, the contiguous described heat radiation of described condenser gas outlet, heat radiation gas enters described condenser from described heat radiation air inlet, and from the outflow of described heat radiation gas outlet, described isolated cover then is positioned between described evaporimeter and described condenser; And

Described control system measures a present temperature of described load air inlet, and compares with a preset need temperature, to control the rotating speed of described minisize dc compressor.

2. minisize dc air-conditioning cooler according to claim 1 is characterized in that:

Described coolant circulating system also comprises a single flow condensation cycle fan relative with described heat radiation gas outlet, described single flow condensation cycle is fanned the gas that will dispel the heat and is brought described condenser into from described heat radiation air inlet, and take described heat radiation gas outlet out of, described isolated cover covers described load air inlet simultaneously, the load gas outlet, single flow vaporization cycle fan and described evaporimeter, described single flow vaporization cycle fan is relative with described load gas outlet, described expander reduces the pressure of described liquid refrigerants, described evaporimeter flashes to gaseous coolant with liquid refrigerants, described minisize dc compressor is brushless design, and can increase the pressure of described gaseous coolant, described condenser is condensed into liquid state with described gaseous coolant.

3. minisize dc air-conditioning cooler according to claim 2 is characterized in that:

Described housing unit also comprise two upright and be reverse sidewall, each piece sidewall both sides connects described load shell and described heat radiation shell respectively, the internal face of described sidewall, the inner surface of described load shell defines described room with common cooperation of the inner surface of described heat radiation shell, described load gas outlet is positioned at described load air inlet top, described heat radiation gas outlet is positioned at described heat radiation air inlet top, described evaporimeter is positioned at described minisize dc compressor top, described single flow vaporization cycle fan is positioned at described evaporimeter top, and described single flow condensation cycle fan is positioned between described condenser and described heat radiation gas outlet.

4. minisize dc air-conditioning cooler according to claim 3 is characterized in that:

Described control system comprises a control module, a power supply unit, a driver, a sensor and a signal adapter, described power supply unit is electrically connected described driver, provide a DC voltage to described driver, described control module has a temperature setting portion for the described preset temperature of input, a comparator that is electrically connected described temperature setting portion, a controller that is electrically connected described comparator and described driver, and a display floater that is electrically connected described controller is with the displays temperature data, described sensor is adjacent to described load air inlet, described signal adapter is electrically connected described sensor and described comparator, and a present temperature of described sensor sensing passed to described comparator, described temperature setting portion is passed to described comparator with described preset need temperature, described comparator is passed to controller with the difference signal of described present temperature and preset need temperature, described actuator electrical connect and according to the signal that is provided after the controller logic computing to drive described minisize dc compressor.

5. minisize dc air-conditioning cooler according to claim 4 is characterized in that:

Described housing unit also comprises a filter screen that is arranged at described heat radiation air inlet.

6. minisize dc air-conditioning cooler according to claim 4 is characterized in that:

The controller of described control module is electrically connected described single flow vaporization cycle fan and described single flow condensation cycle fan, and the rotating speed of controlling described single flow vaporization cycle fan and described single flow condensation cycle fan is to increase its air quantity.

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