KR200405760Y1 - hEAT-EXCHANGING APPARATUS RAISING THE HEATING CAPACITY - Google Patents

Abstract

The present invention relates to a heat exchanger having a high heating performance, to maintain the state of the refrigerant flowing into the compressor to the optimum state in order to achieve the best performance of the compressor when heating to implement only heating cycle by the refrigerant circulation Of course, the heating performance can be dramatically improved.

The present invention for this purpose, the compressor compresses the refrigerant to the high-temperature high-pressure steam state, an expansion valve for pressure drop the high pressure liquid refrigerant to a low pressure liquid refrigerant, and a low pressure liquid refrigerant pressure drop in the expansion valve during cooling A first heat exchanger that acts as an evaporator to receive and vaporize, and acts as a condenser that generates heat while receiving condensed vapor refrigerant from the compressor upon heating and condensing it into a high-pressure liquid refrigerant; A second heat exchanger that vaporizes a portion of the low-pressure liquid refrigerant to vaporize, and serves as a condenser that receives the vapor refrigerant compressed in the compressor during cooling and converts it into a high-pressure liquid refrigerant, and partially vaporized in the second heat exchanger during heating. It comprises a third heat exchanger that serves as an evaporator to receive the refrigerant of the vaporization, and during the cooling, the compressor, The refrigerant is circulated in the order of the three heat exchangers, the second heat exchanger, the expansion valve, and the first heat exchanger, and during the heating, the refrigerant is circulated in the order of the compressor, the first heat exchanger, the expansion valve, the second heat exchanger, and the third heat exchanger. Let's do it.

Air conditioners, heaters, heat exchangers

Description

Heat exchanger with improved heating performance {hEAT-EXCHANGING APPARATUS RAISING THE HEATING CAPACITY}

1 is a block diagram of a heating and cooling device according to the prior art.

2 is a configuration diagram for explaining the configuration of the present invention.

Figure 3 is a perspective view for explaining the configuration of a second heat exchanger according to the present invention.

4 is a partial cross-sectional view of a second heat exchanger according to the present invention.

5 is an operation diagram for explaining a state change of the refrigerant by the heating cycle of the present invention.

Figure 6 is a block diagram for explaining a modified embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

1: casing 2: compressor

3: first heat exchanger 4: expansion valve
5: second heat exchanger 6: third heat exchanger

delete

7: temperature sensor 8: controller

The present invention relates to a heating and cooling device or a heating device, and in particular, in order to maintain the state of the refrigerant flowing into the compressor in an optimal state in order to achieve the best performance of the compressor during heating, the heating cycle only by the refrigerant circulation is implemented. Of course, the present invention relates to a heat exchanger having a higher heating performance to be suitable for dramatically improving the heating performance.

In general, air conditioners are devices that selectively realize cooling and heating by means of two heat exchangers alternately performing the roles of a compressor and a condenser.

Here, the cooling and heating device is the first heat exchanger and the second heat exchanger provided alternately performs the role of the condenser and the evaporator, respectively, the refrigerant is circulated according to the cooling and heating cycle having a continuous process of compression-condensation-expansion-evaporation In reverse circulation, cooling and heating are realized.

The cooling performance depends on how effectively the first heat exchanger cools down during cooling, and the heating performance depends on how effectively the first heat exchanger heats up during heating.

Basically, the heating and cooling performance varies greatly depending on how well the heating and cooling cycle with a continuous process of compression-condensation-expansion-evaporation is performed.

Thus, Figure 1 is a block diagram of a conventional heating and cooling device, Figure 2 is a reference diagram showing the air flow of the conventional heating and cooling device.

As shown, the conventional air conditioner is a compressor (12), the first heat exchanger (13), the expansion valve (14), the evaporator for cooling and the condenser for heating that serves as a condenser for cooling and the evaporator for heating. It comprises a second heat exchanger (15) and a four-way valve (16) for changing the direction of the refrigerant, to select the cooling and heating while going through the continuous process of compression-condensation-expansion-evaporation Could be implemented.

However, the conventional air-conditioning device does not heat the entire room using only a pure heating cycle when heating, but has to operate by installing a large electric heater separately in itself.

This problem is due to the failure of the compressor 12 to compress the refrigerant to high temperature and high pressure, which does not function properly, and subsequent condensation-expansion-evaporation.

That is, in order for the compressor 12 to function properly, the incoming refrigerant should be at a temperature of about 15 [° C.] or more, but in the winter season when heating is actually required, the temperature of the refrigerant flowing into the compressor 12 immediately after the evaporation process is below zero. Will fall to. Moreover, this problem became worse as the temperature was lower, and the compressor 12 was supercooled and could hardly function properly.

Therefore, in the conventional technology, it is inevitable to operate by operating a large electric heater during winter heating, which causes a problem such that the power consumption is increased rapidly.

In addition, due to the rapid temperature drop generated in the evaporator during heating, the thickness of the frost is thickly attached to the surface of the evaporator, as well as in the case of the outdoor unit integrated product, there is a problem that the heating performance is lowered while the evaporator lowers the temperature around the evaporator.

The present invention has been proposed to solve the above-mentioned conventional problems, the object of the present invention is to realize the heating only by the heating cycle by the refrigerant circulation, the state of the refrigerant flowing into the compressor to improve the heating performance It is to provide a heat exchanger with improved heating efficiency to control the.

In order to achieve the above object, a heat exchanger having improved heating performance according to the technical idea of the present invention includes a compressor for compressing a refrigerant and discharging the refrigerant into a high temperature and high pressure steam state, and pressure dropping the high pressure liquid refrigerant with a low pressure liquid refrigerant. An expansion valve and an evaporator that receives and vaporizes a low pressure liquid refrigerant that has been pressure-falled from the expansion valve when cooling, and receives a vapor refrigerant compressed by a compressor during heating, and condenses it into a high pressure liquid refrigerant to generate heat. A first heat exchanger that plays a role, a second heat exchanger which is operated only when heating and vaporizes a part of the low pressure liquid refrigerant from the expansion valve, and a high pressure liquid refrigerant that receives the vapor refrigerant compressed by the compressor during cooling; It serves as a condenser to convert to, and receives the refrigerant in the partially evaporated state in the second heat exchanger when heating And a third heat exchanger which serves as an evaporator for igniting, circulating the refrigerant in the order of the compressor, the third heat exchanger, the second heat exchanger, the expansion valve, and the first heat exchanger when cooling. The technical configuration of the refrigerant is circulated in the order of the compressor, the first heat exchanger, the expansion valve, the second heat exchanger, and the third heat exchanger.

On the other hand, the heat exchange apparatus of the present invention is a compressor for compressing the refrigerant to be discharged in a high temperature and high pressure steam state, a first heat exchanger that receives the vapor refrigerant compressed by the compressor to generate heat while condensing into a high pressure liquid refrigerant, and the first And a second heat exchanger for heating and vaporizing the low pressure liquid refrigerant from the expansion valve by receiving a low pressure liquid refrigerant and reducing the pressure of the high pressure liquid refrigerant condensed in the heat exchanger. Can be featured as a jacket.

Here, a temperature sensor for measuring the temperature of the refrigerant entering the compressor is installed on the refrigerant inlet side of the compressor, and the temperature of the refrigerant entering the compressor is controlled by controlling the second heat exchanger according to a value measured by the temperature sensor. It can be characterized in that the controller is further installed.

In addition, the second heat exchanger has a insertion hole in the center, the heater body is provided with a chamber in which the refrigerant flows in and stays inside the wall surface, and an electric coil inside to generate resistance heat, the insertion And a heating bar inserted into the hole to indirectly heat the refrigerant introduced into the chamber.

In addition, the bimetal to block the abnormal high temperature of the main heater may be characterized in that it is further installed.

Hereinafter, embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

EXAMPLE

The heat exchanger having improved heating performance of the present invention is made to start the compression process by the compressor so that the compressor fully exhibits its original performance not only during the cooling operation but also during the heating operation performed in the winter at low indoor and outdoor temperatures. It is configured to use the heating cycle more actively. This makes it possible to realize a high level of heating performance with a small amount of electricity.

On the other hand, in the case of heating the evaporator can be prevented from exhibiting the performance to unnecessarily lower the ambient temperature or to thicken the frost on the evaporator surface.

Hereinafter, the configuration of the heat exchanger having improved heating efficiency according to the present invention will be described in detail.

2 is a configuration diagram for explaining the configuration of the present invention, Figure 3 is a perspective view for explaining the configuration of the second heat exchanger according to the present invention, Figure 4 is a partial cross-sectional view of the second heat exchanger according to the present invention. .

As shown, the present invention provides a casing (1), a compressor (2), a first heat exchanger (3), a second heat exchanger (5) that operates only during heating, an expansion valve (4), and a third heat exchanger ( 6), the temperature sensor 7 and the controller 8 are included as main components.

Referring to FIG. 2, the present invention has a technical main part of the second heat exchanger 5 which operates only during heating, and during the cooling, the compressor 2, the third heat exchanger 6, and the second heat exchanger ( 5, the operation is not performed), the expansion valve (4), the first heat exchanger (3) in order to circulate the refrigerant, and when the heating direction of the refrigerant by the four-way valve 17 to switch the compressor (2) The refrigerant is circulated in the order of the first heat exchanger 3, the expansion valve 4, the second heat exchanger 5, and the third heat exchanger 6. In the present invention, most of the components except for the second heat exchanger 5, the temperature sensor 7, and the controller 8 may be used as they are used in known air conditioners. Therefore, when cooling the second heat exchanger (5) is not used, it can be said that the action and effect are much the same as compared to the conventional air conditioner.

However, the present invention is a low-temperature low-pressure liquid from the expansion valve (4) by heating and vaporizing the refrigerant sequentially through the secondary by the second heat exchanger (5) and the third heat exchanger (6) during heating The coolant is brought into an optimum temperature (temperature of about 15 [° C.]) state (steam state) required by the compressor 2, thereby improving the heating effect. In this way, it is possible to sufficiently increase the performance of the compressor to improve the performance of the entire heating cycle, and ultimately improve the heating performance. Hereinafter, the configuration of the present invention will be described in more detail with reference to the technical main points.

First, the casing 1 has a machine chamber 11 having an inlet and an exhaust port at a lower portion thereof, and a blower chamber 13 isolated from the machine chamber 11 at an upper portion thereof.

Here, the compressor (2), the second heat exchanger (5) and the third heat exchanger (6) are installed in the machine room (11), and the first heat exchanger (3) and the expansion valve in the blower chamber (13). (4) A four-way valve 17 for switching the direction of the refrigerant is provided. In addition, a blower 15 is installed in the blower chamber 13, and the blower 15 provides cold or warm air for indoor cooling or heating.

The compressor 2 is normally installed stably on the bottom of the machine room 11 in relation to a considerable load, and plays an important role in circulating the refrigerant while compressing the refrigerant at high temperature and high pressure.

The role of the compressor 2 should be the same in the cooling operation or the heating operation, but in the heating operation performed in the winter, the temperature of the refrigerant flowing into the compressor 2 becomes much lower than the proper temperature. You will not be able to function fully. Even when the temperature of the coolant drops to below zero, the compressor 2 is often overcooled, and thus, almost no function is achieved.

However, the compressor 2 according to the present invention can fully perform its original function with the help of the second heat exchanger 5. As a result, the heating cycle is smoothly performed, and the room can be sufficiently heated without having a large electric heater on its own.

The expansion valve (4) serves to pressure drop the high pressure liquid refrigerant to low pressure liquid refrigerant.

The first heat exchanger (3) serves as an evaporator to receive and vaporize the low-pressure liquid refrigerant pressure-reduced by the expansion valve (4) during cooling. In addition, during heating, the vapor refrigerant compressed by the compressor 2 is received and serves as a condenser that generates heat while condensing it into a high-pressure liquid refrigerant.

The second heat exchanger (5) is operated only when heating, and serves to vaporize a portion of the low pressure liquid refrigerant from the expansion valve (4) by heating. The purpose of the installation of the second heat exchanger is to maintain the normal temperature of about 15 [° C.] around the state of the refrigerant entering the compressor 2. This can prevent excessive temperature drop due to the third heat exchanger 6. Therefore, while maintaining the temperature of the refrigerant itself at room temperature, it is possible to prevent the phenomenon that the ambient temperature drops below zero, such as frost around the third heat exchanger (6). As a result, while the compressor 2 fully exerts its performance, smooth operation of the entire heating cycle is ensured and the deterioration of the heating efficiency due to the cooling of the surrounding air can be prevented.

As shown in FIGS. 3 and 4, the second heat exchanger 5 includes a heater body 51 and heating bars 55A and 55B. The heater body 51 has an insertion hole 53 at the center thereof, and a chamber 52 is provided inside the wall surface where the refrigerant flows in and stays out as shown by an arrow. The heating bars 55A and 55B are provided with electric coils 56 extending to the inside thereof, and the electric coils 56 are connected to a power source to generate resistance heat. The heating bars 55A and 55B have a shape that can be inserted into the insertion hole 53. The heating bars 55A and 55B indirectly heat the refrigerant flowing into the chamber 52 while being inserted into the insertion hole 53.

On the other hand, the temperature sensor 7 and the controller 8 are further installed to maximize the action of the second heat exchanger (5). The temperature sensor 7 is installed on the refrigerant inlet side of the compressor 2 to measure the temperature of the refrigerant entering the compressor 2 and notify the controller 8. The controller 8 controls the second heat exchanger 5 according to the value measured by the temperature sensor 7 to adjust the intensity of heating the refrigerant. For example, the controller 9 lowers the heating degree by adjusting the second heat exchanger 5 when the refrigerant temperature flowing into the compressor 2 is higher than an appropriate value. On the other hand, when the refrigerant temperature flowing into the compressor 2 is lower than an appropriate value, the degree of heating is increased by adjusting the second heat exchanger 5.

In addition, the second heat exchanger 5 is further provided with a bimetal (not shown) to block the abnormal high temperature of the second heat exchanger (5). In the case of the bimetal, a known technique may be applied as it is.

In addition, the third heat exchanger 6 serves as a condenser that receives the vapor refrigerant compressed in the compressor 2 and converts the liquid refrigerant into a high pressure liquid refrigerant during cooling, and partially in the second heat exchanger 5 when heating. It serves as an evaporator to accept and vaporize the refrigerant in the vaporized state. The third heat exchanger 6 further heats the refrigerant heated in the second heat exchanger 5 to become a part of the vapor state, thereby making almost the entire refrigerant into a vapor state. However, in this case, since the phase change of the refrigerant has already occurred to some extent in the second heat exchanger 5, it is possible to avoid a sudden temperature change, so that the frost is thickened on the surface of the third heat exchanger 6 or the ambient temperature rapidly decreases. The phenomenon can be prevented.

5 is an operation diagram for explaining a state change of the refrigerant by the heating cycle of the present invention.

As shown, the refrigerant compressed in the compressor (2) during operation of the present invention is a high temperature and high pressure steam between the compressor (2) and the first heat exchanger (3).

Since the refrigerant is condensed into liquid in the first heat exchanger (3) is a liquid state of room temperature and high pressure. In this process, heat generated by the phase change is generated to heat the room.

Thereafter, the refrigerant is expanded while passing through the expansion valve 4 in the liquid state at room temperature and high pressure to become the liquid state at low temperature and low pressure.

Thereafter, the refrigerant is heated while passing through the second heat exchanger 5 to a state of low temperature at room temperature, and part of the refrigerant is vaporized into a vapor state.

Thereafter, the refrigerant is further heated while passing through the third heat exchanger 6 to a state of low temperature at room temperature, and almost entirely vaporized.

Thereafter, the refrigerant exiting the third heat exchanger 6 enters the compressor 2 at a temperature of room temperature.

Subsequently, a modified embodiment of the present invention will be described.

6 is a configuration diagram for explaining a modified embodiment of the present invention.

As shown, the compressor 2 can be simply configured for heating purposes only, including the first heat exchanger 3, the expansion valve 4, and the second heat exchanger 5.

The compressor 2 compresses the refrigerant and sends it out in a high temperature, high pressure steam state.

The first heat exchanger (3) generates heat while receiving the vapor refrigerant compressed by the compressor (2) and condensing it into a high pressure liquid refrigerant.

The expansion valve 4 receives the high pressure liquid refrigerant condensed in the first heat exchanger 3 and receives the low pressure liquid refrigerant to reduce the pressure.

The second heat exchanger (5) heats and vaporizes the low pressure liquid refrigerant from the expansion valve (4).

Such a modified embodiment has a configuration in which the third heat exchanger 6, which serves as a condenser when cooling and an evaporator when heating, is removed as compared with before the deformation. As a result, the third heat exchanger 6 as well as peripheral devices (not shown) such as the blower accompanying it are removed, thereby allowing a simpler configuration.

In the above described a preferred embodiment of the present invention. The present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the present invention defined by the limits of the following utility model registration claims.

As described above, the heat exchanger having a high heating performance according to the present invention, the compressor is able to fully exhibit the performance can be achieved while a smooth heating cycle can achieve a high level of heating performance while reducing the electricity consumption.

In addition, the present invention can be simply configured for heating only, thereby having a cost reduction effect, it can be usefully applied to the product of the portable form.

In addition, the present invention can avoid the phenomenon that the frost is thick on the surface of the third heat exchanger that served as the evaporator during heating or the ambient temperature is sharply lowered.

Claims (5)

A compressor for compressing the refrigerant and discharging the refrigerant into a high temperature and high pressure vapor state; An expansion valve for dropping the high pressure liquid refrigerant into the low pressure liquid refrigerant; When cooling, the expansion valve acts as an evaporator to receive the vapor pressure of the low-pressure liquid refrigerant, and during heating the condenser that generates heat while receiving the compressed vapor refrigerant from the compressor condensed into a high-pressure liquid refrigerant. 1 heat exchanger; A second heat exchanger which is operated only during heating to vaporize a portion of the low pressure liquid refrigerant from the expansion valve; A third heat exchange that serves as a condenser that receives the vapor refrigerant compressed by the compressor and converts it into a high-pressure liquid refrigerant during cooling, and serves as an evaporator that receives and vaporizes a refrigerant partially evaporated in the second heat exchanger during heating. It is configured to include When cooling, the refrigerant is circulated in the compressor, the third heat exchanger, the second heat exchanger, the expansion valve, and the first heat exchanger, and when the heating is performed, the compressor, the first heat exchanger, the expansion valve, the second heat exchanger, Heat exchanger with improved heating performance to circulate refrigerant in the order of three heat exchangers. A compressor for compressing the refrigerant and discharging the refrigerant into a high temperature and high pressure vapor state; A first heat exchanger which receives the vapor refrigerant compressed by the compressor and generates heat while condensing it into a high pressure liquid refrigerant; An expansion valve configured to receive a high pressure liquid refrigerant condensed in the first heat exchanger and receive a low pressure liquid refrigerant; And a second heat exchanger configured to heat and vaporize the low-pressure liquid refrigerant from the expansion valve. The method according to claim 1 or 2, A temperature sensor for measuring the temperature of the refrigerant entering the compressor is installed on the refrigerant inlet side of the compressor, and the temperature of the refrigerant entering the compressor is maintained at a predetermined temperature by controlling the second heat exchanger according to a value measured by the temperature sensor. Heat exchanger to increase the heating performance, characterized in that the controller is further installed. The method of claim 3, wherein the second heat exchanger, A heater body having an insertion hole in the center and having a chamber in which refrigerant flows in and stays inside the wall; Heat resistance device having a heating coil, characterized in that it comprises a heating bar having an electric coil therein to generate a resistance heat, is inserted into the insertion hole for indirectly heating the refrigerant introduced into the chamber. The method of claim 4, wherein Heat exchanger to increase the heating performance, characterized in that the bimetal is further installed to block the abnormal high temperature of the main heater.

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