JP3145551U - Air conditioner - Google Patents

Abstract

An air conditioner capable of preventing condensed water in a high-humidity environment from being frozen or frozen in an evaporator.
The compressor includes a compressor, a condenser, an expansion valve, a first evaporator, and a second evaporator. The compressor compresses the refrigerant into a high-temperature and high-pressure state and introduces it into the condenser to dissipate heat. Then, the refrigerant is liquefied, and the expansion valve 4 limits the amount of liquid refrigerant delivered by the condenser 2 to a very small amount, and passes through the first evaporator 5 and the second evaporator 6 respectively, thereby absorbing heat. The moisture in the air that passes through the first evaporator 5 that maintains the working temperature interval of 0 ° C. to 4 ° C. is condensed and discharged as liquid water. The relatively dry air passes through the second evaporator 6 maintained at a working temperature of 0 ° C. or less, thereby quickly cooling the flowing air. Finally, the vaporized low-pressure gaseous refrigerant is returned to the compressor 1 and circulated.
[Selection] Figure 2

Description

  The present invention relates to an air conditioner such as a refrigerator or an air conditioner, and more particularly to an air conditioner that can suppress frost or icing of an evaporator and effectively improve the overall heat exchange efficiency.

A conventional refrigeration or air conditioner is shown in FIG.
The conventional air conditioner includes an evaporator 50, a condenser 2, a compressor 1, an expansion valve 4 (capillary tube), and a dryer 3 (if necessary).
The refrigerant in the pipeline is compressed by the compressor 1 into a high-temperature and high-pressure gas state, and the high-temperature and high-pressure refrigerant further dissipates heat energy through the condenser 2 and becomes a normal temperature liquid state.
Further, after the moisture is absorbed through the dryer 3, the flow rate of the refrigerant is limited by the expansion valve 4 (capillary tube) and the refrigerant is introduced into the evaporator 50.
At this time, the refrigerant is endothermic and vaporized in the evaporator 50 (the airflow is driven by the fan to accelerate the endothermic operation), and the pressure is reduced to become a low pressure gas state due to vaporization.
Finally, the refrigerant returns to the compressor 1 again, and the above-described refrigerant circulation process is repeated.

In a conventional air conditioner, in an atmospheric pressure environment, moisture in the air condenses into liquid water when the temperature is 4 ° C, and solidifies into frost or soot when the temperature is 0 ° C.
Therefore, when the conventional air conditioner is used in a hot and humid environment, it is necessary to set the working temperature of the evaporator 50 to 4 ° C. or higher or 0 ° C. or lower (for refrigeration).
However, in this case, the range of use is severely narrowed as a whole, and solidified frost or soot isolates the surface of the evaporator 50 from the external environment and makes it impossible to continue the heat exchange operation. The heat exchange efficiency of the evaporator 50 is greatly reduced. This is a serious drawback in use.
The present invention has been made in view of the above-described drawbacks of conventional air conditioners.

  The main problem to be solved by the present invention is that air conditioning that can effectively improve the overall heat exchange efficiency by preventing moisture from solidifying on the surface of the evaporator and becoming frost or soot. Is to provide a device.

In order to solve the above problems, the present invention provides the following air conditioner.
The air conditioner includes a compressor, condenser, expansion valve, first evaporator, second evaporator,
The compressor compresses the refrigerant into a high-temperature and high-pressure state,
The condenser is installed at the delivery end of the compressor, introduces a refrigerant compressed by the compressor, dissipates heat, and makes the refrigerant liquid.
The expansion valve is installed at the delivery end of the condenser and allows the refrigerant delivered by the condenser to pass through with a very small flow rate;
The first evaporator is installed between the inlet end of the compressor and the outlet end of the expansion valve, and allows the refrigerant of the expansion valve to be introduced and passed through, which absorbs heat and reduces the pressure, Set to a low pressure state, returned to the compressor, and maintained the first evaporator at a working temperature of 0 ° C. to 4 ° C .;
The second evaporator is installed between the inlet end of the compressor and the outlet end of the expansion valve, and is connected in parallel with the first evaporator so that the refrigerant of the expansion valve can be introduced and passed through it. Is endothermized, the pressure is reduced, and the pressure is reduced to the low pressure state, and the pressure is returned to the compressor, and the second evaporator is kept at an operating temperature of 0 ° C. or lower.

  The present invention can reduce the frost or icing condition of the evaporator, and can effectively improve the overall heat exchange efficiency.

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
FIG. 2 is a model diagram of the air conditioner according to the first embodiment of the present invention, and FIG. 3 is an operation circulation model diagram of the air conditioner set.

The air conditioner according to the first embodiment of the present invention mainly includes a compressor 1, a condenser 2, a dryer 3, an expansion valve 4, a first evaporator 5, a second evaporator 6, a refrigerant control unit 7, and a control device 8. including.
The compressor 1 compresses the refrigerant in the pipe into a high-temperature and high-pressure gas state, and the high-temperature and high-pressure refrigerant dissipates heat energy through the condenser 2 to form a normal temperature liquid state and absorbs moisture through the dryer 3. The flow rate is limited by the expansion valve 4.

Further, the refrigerant is introduced into the first and second evaporators 5 and 6 through the refrigerant control unit 7 (which can be a three-way control valve 71), and the refrigerant control unit 7 (three-way control valve 71) The amount of refrigerant flowing into the first and second evaporators 5 and 6 can be controlled.
The working temperature of the first evaporator 5 is set between 0 ° C. and 4 ° C., and the working temperature of the second evaporator 6 is set to 0 ° C. or lower.

At the same time, the first evaporator 5 comprises heat exchange fins with a relatively small area.
Moreover, the heat exchange fin has a relatively long length along the direction of air flow. Thus, the time for contact with air is increased.
The second evaporator 6 includes heat exchange fins having a relatively large area in the lateral direction.
Thus, the time for contact with air is increased.

  However, the heat exchange fin has a relatively short length along the direction of air flow, the contact time with air becomes excessively long, and the remaining moisture solidifies and freezes or freezes. It can be avoided.

  The environmental thermometer 81 is installed in the environmental space next to the first and second evaporators 5 and 6, transmits and analyzes temperature information in the air-conditioned environment to the control device 8, and the control device 8 controls the refrigerant. The operation of the unit 7 is controlled.

  In the above-described structure, air is drawn by external power (which can be a fan) during operation, and sequentially passes through the first and second evaporators 5 and 6, and at the same time, the refrigerant control unit 7 (three-way) The control valve 71) controls the flow rate of the refrigerant passing through the first and second evaporators 5 and 6, respectively.

  The working temperature of the first evaporator 5 is 0 ° C. to 4 ° C., and the longer heat exchange fin can extend the contact time with the air, so that the external moist air is used as the first evaporator 5. When passing through, water in the air can be condensed to form water droplets.

The water drops dripped downward fall on the pre-installed water collecting plate 9 and are discharged through the drain pipe 91.
In this way, it is possible to effectively reduce the moisture content in the air and achieve the effect of appropriately drying the air.

  At the same time, the environmental thermometer 81 can detect the temperature of the air passing through the first evaporator 5 at any time, and feeds back and analyzes the detection result to the control device 8 to ensure that the first evaporator 5 is stable. To maintain the working temperature.

  Furthermore, this allows relatively dry air to continue to pass through the second evaporator 6 having an operating temperature of 0 ° C. or less.

  Moreover, the heat exchange fin having a relatively large area in the lateral direction can enlarge the contact area with the air, so that the passing air can be cooled quickly (reducing the ambient environmental temperature), and The evaporator frost or icing situation caused by condensed water can be completely avoided.

  FIG. 4 is an air conditioner model diagram of the second embodiment of the present invention, and FIG. 5 is an operation circulation model diagram of the air conditioner set.

The air conditioner according to the second embodiment of the present invention is mainly based on the structure of the first embodiment, and includes a homologous compressor 1, condenser 2, dryer 3, expansion valve 4, first evaporator 5 and second. An evaporator 6 is included.
Differences from the first embodiment are as follows.

In this example, the control unit 70 through which the refrigerant flows is configured by installing two control valves 72 and 73 at the inlet ends of the first and second evaporators 5 and 6, respectively.
In use, the control device 80 is used to control the operation of the two control valves 72 and 73, respectively, to adjust the flow rate of the refrigerant flowing through the first and second evaporators 5 and 6, and thus another refrigerant. Form a control structure.
In addition, the operation of each component and the achievable functions and effects are the same as those of the first embodiment described above.

  As described above, the air conditioner of the present invention can reliably prevent frost formation or icing, and further improve the heat exchange efficiency.

  Although the present invention has disclosed specific embodiments as described above, these are only optimum embodiments and do not limit the present invention. Anyone who is familiar with the technology can add various variations and coloration within a range that does not depart from the product and scope of the present invention. Based on

It is a model diagram of a known refrigeration or air conditioner. 1 is a model diagram of an air conditioner according to a first embodiment of the present invention. It is an operation | movement circulation model figure of the air conditioner which concerns on this invention 1st Example. It is a model figure of the air conditioner which concerns on this invention 2nd Example. It is an operation | movement circulation model figure of the air conditioner which concerns on this invention 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Dryer 4 Expansion valve 5 First evaporator 50 Evaporator 51, 61 Control valve 6 Second evaporator 7, 70 Refrigerant control unit 71 Three-way control valve 72, 73 Control valve 8, 80 Control device 81 Environmental thermometer 9 Water collecting plate 91 Drain pipe

Claims (17)

An air conditioner,
Including at least a compressor, condenser, expansion valve, first evaporator, second evaporator,
The compressor compresses the refrigerant into a high-temperature and high-pressure state,
The condenser is installed at the delivery end of the compressor, and the refrigerant compressed by the compressor can be introduced to dissipate heat to make the refrigerant liquid.
The expansion valve is installed at the delivery end of the condenser and allows the refrigerant delivered by the condenser to pass through with a very small flow rate,
The first evaporator is installed between the inlet end of the compressor and the outlet end of the expansion valve. By introducing and passing the refrigerant of the expansion valve, the refrigerant is absorbed by heat, and the pressure is reduced. And return to the compressor, and maintain the first evaporator at a working temperature of 0 ° C. to 4 ° C.,
The second evaporator is installed between the inlet end of the compressor and the outlet end of the expansion valve, is connected in parallel with the first evaporator, and the refrigerant is absorbed and vaporized by introducing and passing the refrigerant of the expansion valve, The pressure is reduced to a low pressure state, the pressure is returned to the compressor again, and the second evaporator is maintained at an operating temperature of 0 ° C. or lower.
Air conditioner.   The refrigerant control unit is installed between the first and second evaporators and the expansion valve to control the amount of refrigerant passing through the first and second evaporators, respectively. Air conditioner.   The air conditioner according to claim 2, wherein the refrigerant control unit is controlled by an operation of a control device.   The first evaporator is provided with an environmental thermometer at the end of the air flow route, the environmental thermometer can sense the temperature of air passing through the first evaporator, and the control device controls the refrigerant control unit. The air conditioner according to claim 3, wherein the air conditioner is provided as a reference numerical value.   The air conditioner according to claim 2, 3 or 4, wherein the refrigerant control unit is a three-way control valve.   The air conditioner according to claim 2, 3 or 4, wherein the refrigerant control unit is configured by installing two control valves at the inlet ends of the first and second evaporators, respectively.   A water collecting plate capable of collecting condensed water is installed below the first evaporator, and the water collecting plate is provided with a drain pipe that leads out to the outside. The air conditioner described.   6. The air conditioner according to claim 5, wherein a water collecting plate capable of collecting condensed water is installed below the first evaporator, and the water collecting plate is provided with a drain pipe leading to the outside.   The air conditioner according to claim 6, wherein a water collecting plate capable of collecting condensed water is installed below the first evaporator, and the water collecting plate is provided with a drain pipe leading to the outside.   The first evaporator comprises heat exchange fins having a relatively small area, and the heat exchange fins have a relatively long length along the direction of air flow. 4. The air conditioner according to 4.   The air conditioner according to claim 5, wherein the first evaporator includes a heat exchange fin having a relatively small area, and the heat exchange fin has a relatively long length along a direction of air flow.   The air conditioner according to claim 6, wherein the first evaporator includes a heat exchange fin having a relatively small area, and the heat exchange fin has a relatively long length along a direction of air flow.   The air conditioner according to claim 7, wherein the first evaporator includes a heat exchange fin having a relatively small area, and the heat exchange fin has a relatively long length along a direction of air flow.   The second evaporator comprises heat exchange fins having a relatively large area, and the heat exchange fins have a relatively short length along the direction of air flow. 4. The air conditioner according to 4.   The air conditioner according to claim 5, wherein the second evaporator includes a heat exchange fin having a relatively large area, and the heat exchange fin has a relatively short length along a direction of air flow.   The air conditioner according to claim 6, wherein the second evaporator includes a heat exchange fin having a relatively large area, and the heat exchange fin has a relatively short length along a direction of air flow.   The air conditioner according to claim 7, wherein the second evaporator includes a heat exchange fin having a relatively large area, and the heat exchange fin has a relatively short length along a direction of air flow.

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