KR20130029916A - The outside heat exchanger for dual type cooling and heating equipment - Google Patents

Abstract

PURPOSE: An external defrosting heat exchanger for a cooling and heating device is provide to prevent the degradation of energy saving and efficiency in heating by not operating a reversing cycle. CONSTITUTION: An external defrosting heat exchanger(600) for a cooling and heating device comprises a case body(610), a first coil(630), a second coil(640), and a third coil(650). The first-third coils are installed in an inner space of the case body. A thermal medium of high temperature is used for defrosting in the first coil. The second coil is used for an evaporator of the high temperature evaporating a first thermal medium of a heat transmission cycle. The third coil is used for the evaporator or a condenser of low temperature in a heat gain cycle. [Reference numerals] (700) Control unit; (AA) Air

Description

Defrost-proof outdoor heat exchanger for dual type air conditioners {The Outside Heat Exchanger For Dual Type Cooling And Heating Equipment}

The present invention relates to an outdoor heat exchanger used in a dual-type air-conditioning apparatus consisting of a heat transfer cycle and a heat acquisition cycle using a cascade heat exchanger. It relates to a defrost prevention outdoor heat exchanger for a dual-type air conditioning system.

In general, the cascade heat exchanger is a shared configuration in the heat transfer cycle for producing hot water and the heat acquisition cycle for producing cold water, and is used as an evaporator in the heat transfer cycle, a condenser in the heat acquisition cycle, and usually consists of a heat pump.

As a technology related to a dual-type air conditioner consisting of a heat transfer cycle for producing hot water using the cascade heat exchanger and a heat acquisition cycle for producing cold water, a dual refrigeration cycle having a cascade heat exchanger of Patent Document 1 (KR) No. 0639104 Using a heat pump system for cooling and heating and hot water supply using a heat exchanger, a cascade heat exchanger using the (KR) registered patent No. 0859311 of Patent Document 2, and a cascade heat exchanger using the (KR) Patent Publication No. 10-2010-0096996 An air conditioning system is provided.

The technology provided in the said patent document 1 and patent document 2 consists of a structure like FIG.

As shown in FIG. 1, the dual-type cooling and heating system includes a heat transfer cycle 100 for transferring heat to water for producing hot water, a heat acquisition cycle 200 for obtaining heat from water for producing cold water, and the heat transfer cycle ( Cascade heat exchanger 300 which is an evaporator of 100) and a condenser of heat acquisition cycle 200, a hot water tank 400 for storing hot water produced by the heat transfer cycle 100, and the heat acquisition cycle 200 Consists of cold water tank (500) for storing the produced cold water,

The heat transfer cycle 100 includes a high temperature side compressor 110 in which a first heat medium is compressed, a high temperature side condenser 120 in which one side is connected to an outlet of the high temperature side compressor 110, and the high temperature side condenser 120. One side is in communication with the high temperature to expand the first heat medium passed through the auxiliary heat exchanger 130 and the auxiliary heat exchanger 130 to lower the temperature of the first heat medium discharged from the high temperature side condenser 120 A cascade installed between the side expansion valve 140 and the outlet of the high temperature side expansion valve 140 and the high temperature side compressor 110 to evaporate the first heat medium expanded by the high temperature side expansion valve 140. A heat exchanger (300),

The heat acquisition cycle 200 includes a low temperature side compressor 210 that compresses a second heat medium, the cascade heat exchanger 300 that communicates with the low temperature side compressor 210 to condense a second heat medium, and the cascade. The low temperature side first expansion valve 220 for expanding the second heat medium passing through the heat exchanger 300 and the low temperature side first expansion valve 220 are in communication with each other, so as to exchange heat with cold water of the cold water tank 500. The low temperature side evaporator 230, and one side is pipe connected to the outlet side of the low temperature side compressor 210, the other side pipe connection with the inlet side and the cascade heat exchanger 300 inlet side of the low temperature side compressor 210. When the cold water is generated as a condenser, when generating hot water, the low temperature side evaporation / condenser 240, which serves as an evaporator, and the low temperature side evaporation / condenser 240 is installed at the inlet side of the Low temperature side second swell to expand the second heat medium And the valve 250, one side is connected to the outlet of the cascade heat exchanger 300, and the other end includes a third expansion valve (260) installed in the auxiliary heat exchanger (130).

In the dual type air conditioner, the heat transfer cycle 100 is not driven alone in the heating mode, and is driven together with the heat acquisition cycle 200 so that the high temperature side compressor 110 and the heat acquisition cycle of the heat transfer cycle 100 ( Since the low temperature side compressor 210 of the 200 is driven together, there is a problem that the thermal efficiency is lowered.

The present invention is to solve the problem of low efficiency by the heat transfer cycle 100 and the heat acquisition cycle 200 is always driven together in the heating mode as described above, Patent Document 3 also in order to solve this problem heat transfer cycle in heating mode Only 100 provides a technique for driving alone.

In the cooling and heating system using the cascade heat exchanger of Patent Document 3 (KR) Patent Publication No. 10-2010-0096996, but including the configuration of the dual-type air-conditioning system provided in Figure 1, only the heat transfer cycle 100 in heating mode alone One side is connected to the outlet side of the auxiliary heat exchanger 130 to be driven, and the other side is to include a high-temperature side evaporator using cold water connected to the inlet side of the high-temperature compressor (110).

In the case of Patent Document 3 made as described above, defrosting is likely to occur in the high temperature side evaporator in the heating mode, and there is a disadvantage in that efficiency is lowered due to reverse cycle driving to prevent defrosting.

(KR) Patent No. 0639104 (KR) Patent No. 0859311 (KR) Publication 10-2010-0096996

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

The present invention is a dual type heating and cooling device comprising a heat transfer cycle for producing hot water, a heat acquisition cycle for producing cold water, and a cascade heat exchanger which is an evaporator of the heat transfer cycle and a condenser of a heat acquisition cycle, producing hot water. It is to provide a defrost prevention outdoor heat exchanger for dual-type air-conditioning and heating device to prevent the defrost phenomenon occurring in each evaporator installed in the heat transfer cycle and heat acquisition cycle during heating to prevent efficiency and breakage.

The defrost prevention outdoor heat exchanger for a dual type air conditioner according to the present invention, which is invented to achieve the above object, is a heat transfer cycle for producing hot water, a heat acquisition cycle for producing cold water, and an evaporator of the heat transfer cycle. A cascade heat exchanger, which is a condenser of a cycle, includes an outdoor heat exchanger used for a dual type air conditioner for heating and hot water using hot water produced in the heat transfer cycle, and cooling using cold water produced in the heat acquiring cycle. In

The outdoor heat exchanger has a case body having an inner space in which an inlet and an outlet are formed so that air is introduced and discharged therein, a fan installed in the inner space of the case body to forcibly move air, and a heat transfer cycle in the inner space of the case body. Defrosting first coil installed to supply the first heating medium discharged from the high temperature side condenser, second coil for evaporation used as the high temperature side evaporator for evaporating the first heating medium, and low temperature side evaporation for evaporating the second heating medium And a third coil used as a condenser.

The fan is installed at an air inlet side, and the first coil for defrosting, the second coil for the high temperature side evaporator, and the third coil for the low temperature side evaporator / condenser are sequentially disposed to preheat the air preheated in the defrost coil. Move to the second coil and the third coil to prevent the defrost phenomenon.

The defrost prevention outdoor heat exchanger for the dual type air conditioner according to the present invention having the above-described structure is provided with a first heat medium having a liquid state of high temperature and high pressure discharged from the high-temperature side of the heat transfer cycle and supplied to the defrost coil to preheat the air to heat the cycle and heat. If defrost occurs because the temperature of the evaporator in the acquisition cycle falls below the dew point temperature, the defrost phenomenon can be solved by the air preheated by the defrost coil, and the evaporator temperature of the transfer cycle and the heat acquisition cycle does not reach the dew point temperature. Defrost can be prevented by preventing the deterioration of cycle efficiency caused by defrost of the evaporator and damage due to freezing.

In addition, the present invention defrost prevention outdoor heat exchanger for dual-type air-conditioning unit is used as the heat source of the defrosting coil for supplying the preheated air used for the defrost suppression using the first heat medium of the liquid state of the high temperature and high pressure discharged from the high-temperature side reactor As a result, a separate heat source is not required and the reverse cycle is not driven, thereby saving energy and reducing efficiency during heating.

1 is a schematic diagram of a dual type air conditioner in the prior art.
Figure 2 is a schematic diagram of a dual-type air-conditioning device showing an embodiment in which the anti-defrost outdoor heat exchanger for a dual-type air-conditioning device of the present invention is used.
Figure 3 is a schematic cross-sectional view of an anti-defrost outdoor heat exchanger for a dual type heating and cooling device showing an embodiment of the present invention.
Figure 4 is a partial perspective schematic view of a defrost prevention outdoor heat exchanger for a dual type heating and cooling device showing an embodiment of the present invention.
FIG. 5 is a view illustrating an operation mode of a dual type air conditioner according to an embodiment in which an anti-defrost outdoor heat exchanger for a dual type air conditioner according to the present invention is used (a) is a heating mode, and (b) is a defrost mode.
FIG. 6 illustrates another operation mode of the dual type air conditioner according to an embodiment in which the anti-defrost outdoor heat exchanger for the dual type air conditioner according to the present invention is used (a) is a heating mode, and (b) is a defrost mode.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

In FIG. 2, which shows an embodiment of the present invention, the dual type air conditioner shown in FIG. 2 uses the same reference numerals to facilitate understanding of the same configuration as that of FIG. 1.

3 and 4, the configuration of the dual type defrosting outdoor heat exchanger 600 of the present invention is a case body 610 having an inner space in which an inlet and an outlet are formed so that air flows in and out, and the case It consists of a fan 620 for forcibly moving the air installed in the interior space of the body 610, the first defrosting coil 630, the second and third coils 640, 650 for evaporation, One or more temperature sensors 660 are installed in the second and third coils 640 and 650 to detect the occurrence of a defrost phenomenon, and the temperature sensors 660 are electrically connected to the controller 700.

As shown in FIG. 2, the defrosting first coil 630 is installed to communicate with the outlet of the high temperature side condenser 120 to supply a first heat medium having a high temperature and high pressure liquid state to preheat air to prevent defrosting. ,

The second coil 640 is installed so as to communicate with the outlet of the expansion valve so that the first heat medium expanded so that the heat transfer cycle 100 can be driven independently when heating,

The third coil 650 is installed to be used as a low temperature side condensation / evaporator used as a condenser and an evaporator in the heat acquisition cycle 200.

The second coil 640 is installed in parallel with the cascade heat exchanger 300 such that the first heating medium is selected from the second coil 640 or the cascade heat exchanger 300 so as to evaporate, and thus, in the operation mode of the air conditioning and heating device. Accordingly, the first fruit is caused to evaporate in the second coil 640 or the cascade heat exchanger 300.

In FIG. 3, the fan 620, the first coil 630, the second coil 640, and the third coil 650 are sequentially arranged from the inlet side through which air is introduced into the case body 610. 620 may be installed at an outlet side through which air is discharged, and the first coil 630 used for defrosting may be installed between the second coil 640 and the third coil 650. It may be arranged in a manner.

The dual type air conditioner is described with reference to FIG. 2, which shows an embodiment in which a defrost prevention outdoor heat exchanger 600 for a dual type air conditioner using the cascade heat exchanger of the present invention is used.

As shown in FIG. 2, the dual type air conditioner using the defrost prevention outdoor heat exchanger 600 for the dual type air conditioner according to the present invention includes a heat transfer cycle 100 for producing hot water using a first heat medium (first refrigerant), A heat acquisition cycle 200 for producing cold water using a second heat medium (second refrigerant), a cascade heat exchanger 300 which is an evaporator of the heat transfer cycle 100 and a condenser of the heat acquisition cycle 200, and With a hot water tank 400 for storing the hot water produced by the heat transfer cycle 100, a cold water tank 500 for storing the cold water produced by the heat acquisition cycle 200, and a control unit 700 for controlling the heating and cooling device The heat transfer cycle 100 and the heat acquisition cycle 200 are driven (used) simultaneously or selectively depending on the mode of operation.

The heat transfer cycle 100 is a high temperature side condenser for performing heat transfer to the hot water tank 400 by using the high temperature side compressor 110 for compressing the first heat medium and the first heat medium compressed by the high temperature side compressor 110. And a subsidiary heat exchanger 130 in which the first heat medium condensed in the high temperature side condenser 120 is controlled and supplied by a supply valve 130v for an auxiliary heat exchanger composed of an solenoid valve, and the high temperature side condenser 120. And a first coil 630 for defrost installed in the defrost prevention outdoor heat exchanger 600 for a dual-type air-conditioning and heating device that is controlled by a defrost supply valve 630v consisting of a solenoid valve. The high temperature side expansion valve 140 for expanding the first heat medium passing through the high temperature side condenser 120 or the first coil 630 for defrosting, and the first heat medium expanded in the high temperature side expansion valve 140 K case heat exchanger 400, and the K case The second coil 640 for evaporation installed in the outdoor heat exchanger 600 installed in parallel with the heat exchanger 400 and used for the high temperature side evaporator for evaporating the first heat medium expanded by the high temperature side expansion valve 140. It consists of.

The high temperature side expansion valve 140 includes a first high temperature side expansion valve 141, a second high temperature side expansion valve 142, and a third high temperature side expansion valve 143. A plurality of supply valves (141v, 142v, 143v) consisting of a solenoid valve for controlling the supply of the first heating medium is installed in the front, the supply valves (141v, 142v, 143v) is electrically connected to the control unit 700 And manipulated by electrical signals.

The heat acquisition cycle 200 includes a low temperature side compressor 210 that compresses a second heat medium, a cascade heat exchanger 300 that communicates with the low temperature side compressor 210 to condense a second heat medium, and the cascade heat exchange. The low temperature side first expansion valve 220 for expanding the second heat medium passing through the gas 300 and the low temperature side first expansion valve 220 to communicate with the cold water of the cold water tank 500 The low temperature side evaporator 230, and one side is pipe connected to the outlet side of the low temperature side compressor 210, the other side is pipe connected to the inlet side and the cascade heat exchanger 300 inlet side of the low temperature side compressor 210. The third coil 650 and the third coil 650 installed in the outdoor heat exchanger 600 used as a condenser when generating cold water and as a low temperature side evaporator / condenser for generating hot water. Installed at the inlet side of the hot water to generate a second A second low temperature expansion valve 250 for expanding the medium, one side is connected to the outlet side of the cascade heat exchanger 300, the other side is a third low temperature expansion valve 260 installed in the auxiliary heat exchanger (130) It is composed.

The defrosting first coil 630 preheats the air introduced by the fan 620 using the first heat medium of the high temperature and high pressure liquid state discharged from the high temperature side condenser 120, as shown in FIGS. 3 and 4. By supplying to the second coil 640 and the third coil 650, the temperature is prevented from falling below the dew point temperature at which defrosting occurs due to evaporation, thereby preventing defrosting and may be evaporation efficiency.

By installing the defrost prevention outdoor heat exchanger 600 for the dual-type air-conditioning unit of the present invention made as described above in the dual-type air-conditioning unit, various operation modes are possible, for example, a heating mode for producing hot water and heating, for example. Explain.

[heating mode  One]

As shown in FIG. 5, the heat transfer cycle 100 and the heat acquisition cycle 200 using the cascade heat exchanger 300 are simultaneously driven. As a mode used in winter, hot water is produced and used for heating and hot water supply.

In the heat transfer cycle 100, as shown in FIG. 5A, the first heat medium composed of the gaseous phase is compressed into a gas of high temperature and high pressure in the high temperature side compressor 110, and then supplied to the high temperature side condenser 120. In the condenser 120, the first heat medium is condensed and phase-changed into a high temperature and high pressure liquid to transfer heat to the hot water tank 400 to produce hot water, and the first heat medium of the high temperature and high pressure liquid is an auxiliary heat exchanger 130. Guided to the first high temperature side expansion valve 141 to expand. The expanded first heat medium is evaporated in the case heat exchanger 400, the evaporated first heat medium is supplied to the high temperature side compressor 110 and circulated in a cycle to be compressed again to transfer heat to the hot water tank 400 to provide hot water. Produce heating and hot water supply.

In the heat acquisition cycle 200, the second heat medium formed in the gas phase is compressed by the low temperature side compressor 210 and supplied to the cascade heat exchanger 300 by the guide of the low temperature three-way solenoid valve 270 to condense. The second heat medium condensed in the cascade heat exchanger 300 is supplied to the low temperature side second expansion valve 250 to expand, and the expanded second heat medium is extended to the third coil 650 for the low temperature side evaporation / condenser. After supplying and evaporating, the water is supplied to the low temperature side compressor 210 and circulated in a cycle of being compressed again.

When the temperature of the third coil 650 for the low temperature side evaporation / condenser of the heat acquisition cycle 200 is lowered below the dew point temperature due to evaporation, or when the defrost phenomenon is reached or reaches the dew point temperature of FIG. As shown in (b) (defrost mode), the preheated air is supplied by supplying the first heating medium having a high temperature and high pressure liquid state discharged from the high temperature side condenser 120 of the heat transfer cycle 100 to the defrosting first coil 630. It is supplied to the 3 coil 650 to prevent defrosting. In this case, the supplied preheated air may be used as the heat of evaporation of the third coil 650 to increase the evaporation efficiency to increase the efficiency of the heat acquisition cycle 200.

That is, the controller 700 closes the supply valve 130v for the auxiliary heat exchanger of the auxiliary heat exchanger 130 of the heat transfer cycle 100 when the temperature of the signal measured by the temperature sensor 660 reaches the dew point temperature. Opening and closing the defrost supply valve 630v so that the first high temperature liquid of high temperature and high pressure discharged from the high temperature side condenser 120 is supplied to the defrosting first coil 630 so as to heat the air introduced to the low temperature side evaporation. It is supplied to the third coil 650 to be used as a condenser to prevent defrost at the same time to supply the evaporation heat to increase the evaporation efficiency to increase the efficiency of the heat acquisition cycle (200).

In this way, defrosting can be prevented without driving the reverse cycle.

[heating mode  2]

As shown in FIG. 6, the heat transfer cycle 100 is driven alone without using the cascade heat exchanger 300. As a mode used in winter, hot water is produced and used for heating and hot water supply.

In the heat transfer cycle 100, as shown in FIG. 6A, the first heat medium formed in the gas phase is compressed into a gas of high temperature and high pressure in the high temperature side compressor 110, and then supplied to the high temperature side condenser 120. In the condenser 120, the first heat medium is condensed and phase-changed to a high temperature and high pressure liquid to transfer heat to the hot water tank 400, and the first heat medium of the high temperature and high pressure liquid passes through the auxiliary heat exchanger 130. Guided and expanded by the third high temperature side expansion valve 143, the expanded first heat medium is evaporated in the second coil 640, the evaporated first heat medium is supplied to the high temperature side compressor 110 and compressed again By circulating in a cycle to transfer heat to the hot water tank 400 to produce hot water.

When defrosting occurs because the temperature drops below the dew point temperature due to the evaporation of the second coil 640 for the high temperature side evaporator of the heat transfer cycle 100 in the operation heating mode, or FIG. (Defrost mode) is supplied to the first coil 630 for the high-temperature, high-pressure liquid state of the high temperature and high pressure liquid state discharged from the high-temperature side condenser 120 of the heat transfer cycle 100 to the second coil for the high-temperature side evaporator The defrost phenomenon of the (640) is prevented.

That is, when the temperature of the signal measured by the temperature sensor 660 reaches the dew point temperature, the auxiliary heat exchanger supply valve 130v of the auxiliary heat exchanger 130 of the heat transfer cycle 100 is closed, and the defrost supply valve ( Opening and closing the 630v to be supplied to the first heating medium of the high temperature and high pressure liquid state discharged from the high-temperature side condenser 120 to the first coil 630 for defrosting to heat the air introduced to the second coil for the high-temperature side evaporator ( At the same time to prevent the defrost of the 640 to supply the evaporation heat to increase the efficiency of the heat transfer cycle 100 to increase the evaporation efficiency.

In this way, defrosting can be prevented without driving the reverse cycle.

The defrost prevention outdoor heat exchanger for the dual type air conditioner of the present invention made as described above is used in a dual type air conditioner that uses a cascade heat exchanger to prevent defrost phenomenon without driving a reverse cycle, thereby enabling various operating modes. And can be operated in a variety of forms according to the conditions and can increase the efficiency for heating and cooling, especially four seasons as in Korea, and can be used in a region that is very suitable for regions with severe temperature deviation will be widely available in industry.

100: heat transfer cycle 110: high temperature side compressor
120: high temperature side condenser 130: auxiliary heat exchanger
140: high temperature side expansion valve
200: heat acquisition cycle 210: high temperature side compressor
220, 250, 260: Low temperature expansion valve 270: 3 way valve
300: Cascade Heat Exchanger
400: hot water tank
500: cold water tank
600: outdoor heat exchanger 610: case body
620: fan 630, 640, 650: coil
700: control unit P: pump

Claims (5)

A heat transfer cycle for producing hot water, a heat acquisition cycle for producing cold water, and a cascade heat exchanger, an evaporator of the heat transfer cycle and a condenser of the heat acquisition cycle, and heating and hot water using the hot water produced in the heat transfer cycle. In the outdoor heat exchanger used in the dual-type air-conditioning device to cool by using the cold water produced in the heat acquisition cycle,
The outdoor heat exchanger 600,
A case body 610 having an inner space in which an inlet and an outlet are formed so that air is introduced and discharged;
A first coil 630, a second coil 640, and a third coil 650 are installed in the inner space of the case body 610.
The first coil 630 is a high temperature heat medium is used for defrosting,
The second coil 630 is used as a high temperature side evaporator for evaporating the first heat medium of the heat transfer cycle 100,
The third coil (650) is a defrost prevention outdoor heat exchanger for dual-type air conditioners, characterized in that used as a low temperature side evaporation / condensation of the heat acquisition cycle (200). The method of claim 1,
The outdoor heat exchanger (600) is installed in the inner space of the case body (610) defrost prevention outdoor heat exchanger for dual type heating and heating device, characterized in that the fan 620 for forcibly moving the air is further installed. The method of claim 2,
The fan 620 is installed on the air inlet side,
The first coil 630, the second coil 640, and the third coil 650 are sequentially disposed, and the air preheated by the defrosting first coil 630 may be separated from the second coil 640. Defrost prevention outdoor heat exchanger for dual-type heating and cooling device, characterized in that to move to the third coil (650) to prevent defrosting. 3. The method according to claim 1 or 2,
The second coil 640 is installed in parallel with the cascade heat exchanger 300 so that the expanded first heat medium selectively moves with the cascade heat exchanger 300 to evaporate. group. 3. The method according to claim 1 or 2,
At least one temperature sensor (600) for detecting the defrost of the second coil (640) and the third coil (650) is installed, the anti-defrost outdoor heat exchanger for a dual-type heating and cooling device.

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