KR101309210B1 - Heat pump system for multi-function - Google Patents

Abstract

PURPOSE: A multifunctional heat pump system is provided to produce medium temperature water and hot water from a first condenser and a second condenser, thereby using the medium temperature water and the hot water for various purposes. CONSTITUTION: A multifunctional heat pump system includes a first recovery line (14a) and a second recovery line (14b), which are equipped with an opening and closing valve. The first and second recovery lines are branched from a first condenser (12a) and a second condenser (12b), which are located in the previous location of check valves (C1, C2). The first and second recovery lines are connected to a recovery line (14) at the position between an evaporator (5) and a liquid separator (6). An overpressure exhaust line (13a) including an electric valve (S5) is branched from an expansion line (13) located between a liquid receiver (3) and an expansion valve (4). The overpressure exhaust line is connected to the recovery line at the position between the evaporator and the liquid separator. A pressure switch (13b) is installed in an expansion line (13) and the overpressure exhaust line to operate the electric valve.

Description

Heat pump system for multi-function

The present invention is to supply the refrigerant gas (hot gas) discharged from the compressor to the first condenser and the second condenser to produce the medium temperature hot water and hot water, respectively, opening and closing from the outlet condensation line of the first condenser and the second condenser By diverting the first and second recovery lines with valves and connecting each recovery line with a low pressure recovery line extending from the evaporator to the liquid separator, the refrigerant stored in the unused condenser of the two condensers is Through the recovery line and the liquid separator, the entire volume is recovered to the compressor, which prevents the unbalance of the refrigerant balance and the deterioration of the refrigerant during the operation of the heat pump system, as well as the expansion of the expansion valve. Extends the overpressure discharge line with a pressure switch and a solenoid valve from the line and connects the overpressure discharge line with the low pressure recovery line. By preventing the increase in the internal pressure of the pipe due to the excess of the amount of refrigerant recovered from the condenser for hot water and the overload of the compressor when using the hot water condenser, the second condenser is provided with a third expansion line and an open / close valve By connecting each of the overpressure discharge line and the low pressure recovery line by a third recovery line equipped with a second condenser, if necessary, the second condenser is used as a hot water heater or a quenched second evaporator to cool the hot water or hot water as clean fresh water. Seawater) or multi-temperature heat pump system for production with warm water (sea water).

In general, in the residential spaces such as houses or offices and factories, the cooling of the summer and the heating of the winter are the main factors of the living environment.In recent years, the expansion of residential space and industrial development due to the increase of population Due to the increase of factory sites and offices, the demand for energy for cooling and heating is rapidly increasing.

Compared to the above-mentioned increase in energy demand, the supply of energy is not sufficiently kept up due to the price increase of fossil fuels such as petroleum and natural gas, and environmental pollution caused by the smoke generated during the combustion of fossil fuels. In particular, in urban bathhouses, on-shore farms, or in livestock farms, there are severe management pressures due to the burden of cold and hot water supply and cooling and heating costs caused by rising fossil fuel prices.

In order to overcome these factors, the heat that allows the simultaneous supply of cold and hot water and cooling and heating without generating pollution using heat generated and recovered during the compression, condensation and evaporation of refrigerant gas. Pump systems are widely used, and the heat pump system can supply hot water of 20 to 28 ° C. at a small cost corresponding to 10% of oil costs, and by arranging a blower or an electric heat pipe in various ways to cool and heat. It is also an economical and environmentally friendly system to perform.

In the conventional heat pump system, as illustrated in FIG. 1, a discharge line 11 extending from the compressor 1 is connected to the condenser 2, and a condensation line 12 extending from the condenser 2 is provided. It is connected to the receiver 3, the expansion line 13 extending from the receiver 3 with the expansion valve 4 is installed in connection with the evaporator 5, from the evaporator (5) An extended recovery line 14 is installed in connection with the liquid separator 6, and a suction line 15 extending from the liquid separator 6 is installed in connection with the compressor 1.

The receiver tank 3 includes a liquid refrigerant and a gaseous refrigerant supplied from the condenser 2 so as to prevent performance degradation caused by the introduction of the gaseous refrigerant into the evaporator 5. Separating and filtering only the liquid refrigerant to the evaporator (5). The accumulator (6) prevents the liquid refrigerant from being sucked into the compressor (1) and temporarily prevents oil. -Function as a buffer tank to store the liquid refrigerant mixture and meter the mixture back to the compressor (1) at a safe rate.

In addition, the condenser (2) in the form of a heat exchanger is connected to the inlet pipe (16) of the raw water and the discharge pipe (17) of the hot water, the hot water and the like by using the heat radiation action generated in the condensation process of the refrigerant gas. As the evaporator 5 is also formed as a heat exchanger, the inlet 16 and the outlet 17 of the heat source water are connected and installed to supply a heat source required for evaporation of the refrigerant liquid. Instead of circulating the heat source water as shown by the imaginary line, a method of supplying the air heat source using the blowing fan 5a may be applied.

In FIG. 2, a flow path switching valve such as a four-way valve 8 is installed in a discharge line 11 extending from the compressor 1 based on the heat pump system 10 of FIG. 1, while an evaporator ( The recovery line 14 extending from 5) is connected to the liquid separator 6 via the flow path switching valve, so that the condenser 2 is used as the evaporator 5 and the evaporator 5 is used as the condenser 2 if necessary. It shows a known flow path conversion heat pump system 10 to be used as.

Reverse condensation line having a one-way check valve (C4) from the expansion line 13 corresponding to the expansion valve (4) and the evaporator (5) so that the flow path using the four-way valve (8) as described above ( 18 is branched, and this reverse condensation line 18 is installed in connection with the condensation line 12 at a position beyond the check valve C1, and corresponds between the receiver 3 and the expansion valve 4. The one-way check valve C3 is also installed in the expansion line 13, while the one-way check valve C5 and the second expansion are provided from the expansion line 13 corresponding to the check valve C3 and the receiver 3. The second expansion line 19 with the valve 4a is branched, and the second expansion line 19 is connected to the condensation line 12 at a portion corresponding to the previous position of the check valve C1. .

However, the conventional general heat pump system 10 as described above can only produce one kind of hot water in one condenser 2, and adjusts the flow path of the refrigerant and heat recovery rate in the evaporator 5 and Despite various efforts to improve the coefficient of performance (COP), one-dimensional application that uses the heat generated from the condenser 2 for heating or hot water, and the cooling air generated in the evaporator 5 for cooling The situation cannot be escaped from.

For this reason, even in the case of the heat pump system 10 for fish farms, it was used only to feed and feed the raw water flowing into the aquaculture tank in 20 ~ 28 ℃ breeding water, the mother breeding tank of fish for spawning Heat exchange pipes installed in crustacean mother tanks or water tanks such as incubation tanks or incubation tanks to supply high-temperature hot water to warm breeding water stored in the tanks, or to raise the indoor temperature of breeders. This situation is not available for the use, and the same situation was caused in the summer cooling dimension using the flow path switching heat pump system (10).

In order to solve the problems of the conventional heat pump system 10 as described above, while the first condenser and the second condenser are installed in parallel in the discharge line of the refrigerant gas (hot gas) extending from the compressor, A multi-purpose heat pump system was developed by the present applicant in 2012 to produce medium temperature water (20 ~ 28 ℃) and high temperature water (50 ~ 60 ℃) of different temperature in the condenser and to distribute it for various uses. No. 52199 is filed and registered (10-1203104) is known.

However, even in the multipurpose heat pump system pre- filed by the present applicant, the volume of the hot condenser and the hot and cold condenser and the type of heat exchanger applied to each condenser are different (double tube type, shell tube type, plate type, etc.), There was a problem in running the pump system that it was very difficult to balance the overall refrigerant for each condenser.

In other words, if the amount of refrigerant is matched to the capacity of the condenser for high temperature water, which is small in size and volume, the use of the condenser for medium temperature water of which size and volume are larger than medium causes the refrigerant shortage, resulting in deterioration of the performance of the condenser. When the amount of refrigerant is matched with the capacity of the condenser, the internal pressure rise of the pipe and the overload of the compressor are generated due to the amount of refrigerant exceeded when using the condenser for high temperature water, which makes it difficult to operate the heat pump system efficiently and safely.

In addition, when the condenser for high temperature water is used, the current of the compressor becomes very high, the refrigerant gas temperature of the discharge side of the compressor rises by 100 ° C or more, and the internal pressure of the pipe is also formed at a high pressure. By installing a pressure switch for, the compressor is to be stopped when a condition above the set value (limit value), there was a problem that can not continuously produce hot water in the condenser for high temperature water.

In addition, the condenser not used among the two condensers is stored in the refrigerant liquid region 7 at the bottom of the condenser 2 corresponding to the hatched portions in FIGS. 1 and 2, that is, in the refrigerant pipe inside the condenser 2. There may be a situation where liquid residual refrigerant cannot be recovered, and especially when the residual refrigerant in the hot water condenser cannot be recovered when the condenser for medium temperature water is used, the shortage of refrigerant is further intensified to ensure the performance of the condenser for the hot water. It becomes difficult to do it.

In other words, if each condenser is installed at a higher position than the receiver, the remaining refrigerant inside the condenser, which is not used among the two condensers, can naturally flow into the receiver located below, but each condenser When installed in a low position, the remaining refrigerant inside the condenser, which is not used among the two condensers, cannot flow into the receiver, thereby preventing the refrigerant from being supplied to the condenser at the flow rate designed by the compressor, thereby degrading the performance of the condenser. Is triggered.

In addition, the conventional heat pump system 10 produces a breeding water of 20 ~ 28 ℃ in the winter (winter) with the condenser (2), and in the summer (summer) with the evaporator (5) in the cold water of 5 ~ 7 ℃ Although contaminated waste water or breeding water is used as the evaporative heat source of the refrigerant, or when seawater is used as breeding water and heat source water, such as in a beach fish farm, clean fresh water is used by the condenser (2) and the evaporator (5). There was a problem that can not supply and produce hot and hot water (fresh water) or cold water (fresh water).

Republic of Korea Patent No. 10-1203104 (Notice date: November 21, 2012) Republic of Korea Patent No. 10-1215457 (Notice date: January 09, 2013)

The present invention has been made to solve the above-mentioned problems of the first application, the first and second recovery line having an on-off valve from the high-pressure condensation line corresponding to the outlet side of the first condenser and the second condenser Branching and connecting each recovery line with a low pressure recovery line that extends from the evaporator to the liquid separator for the compressor so that the refrigerant stored in the unused condenser of the two condensers during operation of the heat pump system Through the liquid separator, the entire volume can be recovered to the compressor, which prevents the performance of the refrigerant from being unbalanced or the refrigerant deterioration when the heat pump system is operated, as well as from the expansion line corresponding to the expansion valve. In addition, the overpressure discharge line including the pressure switch and the solenoid valve is further extended. By allowing phosphorus to be connected to the low pressure recovery line, it is possible to operate a safe and uninterrupted heat pump system by preventing the internal pressure rise of the pipe and the overload of the compressor due to the excess of refrigerant amount recovered from the condenser for hot water when using the hot water condenser. It is the technical problem to do it.

In addition, according to the present invention, the second condenser is connected to the overpressure discharge line and the low pressure recovery line by the third expansion line having the third expansion valve and the third recovery line having the opening / closing valve, respectively. Produces condensed water at 20 ~ 28 ℃ in the first condenser and recovers the remaining refrigerant in the second condenser in the first condenser, or the second condenser Produce hot water supply hot water of 50 ~ 60 ℃ and recover residual refrigerant of the first condenser in the first recovery line, and suppress internal pressure rise through the overpressure discharge line, or block the refrigerant flow into the evaporator. The second condenser is used as the second evaporator, which is a fresh water quencher, to produce quenched water of 5 ~ 7 ℃, and the first condenser to produce 20 ~ 28 ℃ of medium temperature water (breeding water). Utilization It is possible to produce very good hot and hot water of 50 ~ 60 ℃ or quenching water of 5 ~ 7 ℃ together with cooling water (sea water) or medium temperature water (sea water). It is another technical challenge to provide a pump system.

According to the present invention as a means for solving the above technical problem, the discharge line extending from the compressor is branched into the first discharge line and the second discharge line via the flow path adjusting means, the first discharge line is a first condenser And the second discharge line is connected to the second condenser, and the first condensation line and the second condensation line extend from the first condenser and the second condenser to have a one-way check valve. An expansion line connected to the evaporator is installed and connected to the evaporator, and a recovery line extending from the evaporator is connected to the liquid separator and a suction line extending from the liquid separator is installed. In the heat pump system connected to the compressor, the first condensation line and the second condensation line corresponding to the previous position of the check valve The first and second recovery lines each having an on / off valve are branched, and the first and second recovery lines are connected to the recovery line at a position corresponding between the evaporator and the liquid separator. An overpressure discharge line having a solenoid valve is branched from an expansion line corresponding to the expansion valve and the expansion valve, and the overpressure discharge line is connected to the recovery line at a position corresponding between the evaporator and the liquid separator, and the expansion line or The overpressure discharge line is characterized in that the pressure switch for the operation of the solenoid valve is installed.

In addition, a third expansion line having an on-off valve and a third expansion valve branches from the overpressure discharge line corresponding to the previous position of the solenoid valve, and the third expansion line corresponds between the second condenser and the check valve. It is installed in connection with the second condensation line, the third recovery line having an on-off valve is branched from the second discharge line, the third recovery line is a recovery line at a position corresponding between the evaporator and the liquid separator It is installed in connection with, characterized in that the on-off valve is installed in the expansion line corresponding to the branch between the overpressure discharge line and the expansion valve.

In another embodiment of the present invention, the flow path switching heat pump is provided with a flow path adjusting means including a four-way valve in the discharge line extending from the compressor, while the recovery line extending from the evaporator is connected to the liquid separator via the four-way valve. A system, wherein the first and second recovery lines branching from the first condensation line corresponding to the previous position of the check valve with the on / off valve with the on / off valve extending from the four-way valve to the liquid separator The reverse condensation line having a one-way check valve is branched from the expansion line corresponding to the expansion valve and the evaporator for switching the flow path by the four-way valve. It is installed in connection with the first condensation line or the second condensation line at the portion corresponding to the last position, The one-way check valve is installed in the expansion line corresponding to the valve, while the second expansion line is provided with the one-way check valve and the second expansion valve sequentially from the expansion line corresponding to the check valve and the receiver. The second expansion line is connected to the first condensation line or the second condensation line corresponding to the previous position of the check valve.

In addition, in the flow path switching heat pump system as described above, the overpressure discharge line branched with the solenoid valve from the expansion line corresponding to the receiver and the expansion valve is also extended from the four-way valve to the liquid separator. A third expansion line having an on-off valve and a third expansion valve branched from the overpressure discharge line corresponding to the previous position of the solenoid valve, and the third expansion line is connected to the second condenser and the check valve. It is connected to the second condensation line at a position corresponding to the third recovery line having an on-off valve is branched from the second discharge line, the recovery line extending from the four-way valve to the liquid separator It is installed in connection with, characterized in that the on-off valve is installed in the expansion line corresponding to the check valve and the expansion valve.

According to the present invention as described above, in the first condenser and the second condenser to produce the medium temperature water (20 ~ 28 ℃) and high temperature water (50 ~ 60 ℃) of different temperatures so that it can be used for various uses This results in a heat pump system that is best suited for fish farms with a variety of requirements, such as hatching of fish, fry, cultivation of feed and cultivation of feed, and cooling, heating and dew condensation in the breeder's interior. It has all the effects of the previous application, such as providing.

In addition, the remaining refrigerant inside the condenser, which is not used in the first condenser and the second condenser, is recovered to the compressor through the corresponding recovery line and the liquid separator, so that the volume of the hot water condenser and the hot water condenser and each condenser are applied to each condenser. Even if the type of heat exchanger is different (double tube type, shell tube type, plate type, etc.), it is possible to easily balance the overall balance of refrigerant for each condenser when the heat pump system is operated.

In other words, the heat pump system is operated by adjusting the refrigerant amount to the capacity of the condenser for medium temperature water whose size and volume are larger than the medium size. In order to prevent the deterioration and to increase the internal pressure of the pipe due to the excess amount of refrigerant during the use of the hot water condenser and to overload the compressor, the pressure switch opens the overpressure discharge line so that a certain amount of refrigerant is bypassed to the liquid separator. will be.

As a result, the efficient and safe operation of the heat pump system is possible, and the current of the compressor becomes very high when the condenser for high temperature water is used, and the temperature of the refrigerant gas on the discharge side of the compressor rises above 100 ° C, while the internal pressure of the pipe is increased. Even when this situation occurs at a high pressure, the overpressure discharge line provides an effect of continuously producing hot water without stopping the operation of the compressor.

In particular, as the second condenser is connected to the overpressure discharge line and the low pressure recovery line by the third expansion line with the third expansion valve and the third recovery line with the opening / closing valve, the utilization as clean fresh water It has the effect of producing 50 ~ 60 ℃ hot water and 5 ~ 7 ℃ water quenching water together with cooling water (sea water) or medium temperature water (sea water). This is a very useful additional effect, such as providing a possible multifunctional heat pump system.

1 is a piping diagram showing a conventional heat pump system.
Figure 2 is a piping diagram showing a conventional flow path switching heat pump system.
3 is a piping diagram of a multifunctional heat pump system according to a first embodiment of the present invention.
4 is a piping diagram of a multi-function heat pump system according to a second embodiment of the present invention.
5 and 6 are refrigerant flow charts for each operating state of the multifunctional heat pump system according to the first embodiment of the present invention.
7 to 9 are refrigerant flow charts for each operating state of the multifunctional heat pump system according to the second embodiment of the present invention.
10 is a piping diagram of a multi-function heat pump system according to a third embodiment of the present invention.
11 is a piping diagram of a multifunctional heat pump system according to a fourth embodiment of the present invention.
12 is a piping diagram of a multifunctional heat pump system according to a fifth embodiment of the present invention.

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

In the heat pump system 10 according to the first embodiment of the present invention, as shown in FIG. 3, the discharge line 11 extending from the compressor 1 is connected to the first discharge line 11a via a flow path adjusting means. ) And a second discharge line (11b), the first discharge line (11a) is installed in connection with the first condenser (2a), the second discharge line (11b) is connected to the second condenser (2b) The flow path adjusting means is provided from the solenoid valve S1 (S2) or the discharge line 11, respectively, provided in the first discharge line 11a and the second discharge line 11b, respectively. ) And a three-way valve 9 installed at a position where the second discharge line 11b branches.

In addition, the first condenser line 12a and the second condensation line 12b extending from the first condenser 2a and the second condenser 2b with one-way check valves C1 and C2 are provided. The expansion line 13 is integrated into the condensation line 12 of the following and connected to the receiver 3, and the expansion line 13 extending from the receiver 3 with the expansion valve 4 to the evaporator 5. The connection line is installed, the recovery line 14 extending from the evaporator 5 is connected to the liquid separator 6, the suction line 15 extending from the liquid separator 6 is connected to the compressor 1 do.

As described in the prior art, the first condenser 2a and the second condenser 2b are in the form of a heat exchanger, and as the inlet pipe 16 of the raw water and the outlet pipe 17 of the hot water are connected and installed, Using the heat dissipation effect generated during the condensation of the gas to produce the medium temperature water (20 ~ 28 ℃) and high temperature water (50 ~ 60 ℃), respectively, the first condenser (2a) in the drawing for the medium temperature water, The second condenser 2b becomes hot water.

In addition, as the evaporator 5 is also formed as a heat exchanger, the inlet pipe 16 and the outlet pipe 17 of the heat source water are connected and installed to supply a heat source necessary for evaporation of the refrigerant liquid. Instead of circulating the heat source water as shown, a method of supplying an air heat source using a blowing fan 5a may be applied, and the first condensation line 12a and the second condensation line 12b are one It may be connected to each of the receiver 3 without being integrated into the condensation line (12).

As a component corresponding to the first essential part of the present invention, the solenoid valve S3 (from the first condensation line 12a and the second condensation line 12b corresponding to the previous position of the check valves C1 and C2) ( The first recovery line 14a and the second recovery line 14b each having S4 are branched, and the first recovery line 14a and the second recovery line 14b are evaporator 5 and the liquid separator ( It is to be connected to the recovery line 14 at a position corresponding to between 6).

As the first recovery line 14a and the second recovery line 14b are applied as described above, the refrigerant liquid region below the inner side of the condenser that is not used among the first condenser 2a and the second condenser 2b ( The residual refrigerant present in 7) is discharged from the evaporator 5 to the low pressure recovery line 14 extending to the liquid separator 6, and then through the liquid separator 6 and the suction line 15 to the compressor 1 To be recovered.

As a component corresponding to the second essential part of the present invention, the overpressure discharge line 13a provided with the solenoid valve S5 from the expansion line 13 corresponding to the receiver 3 and the expansion valve 4 is provided. Is branched and the overpressure discharge line 13a is connected to the recovery line 14 at a position between the evaporator 5 and the liquid separator 6, and the previous position of the expansion valve 4 A pressure switch 13b for operating the solenoid valve S5 is installed in the expansion line 13 or the overpressure discharge line 13a corresponding to the expansion line 13.

The overpressure discharge line 13a operates the heat pump system 10 to use the second condenser 2b for high temperature water, and the first recovery line 14a and the liquid separator 6 from the first condenser 2a for medium temperature water. The pressure switch 13b when the internal pressure rise of the pipe and the overload of the compressor 1 are caused by the amount of refrigerant exceeded necessary for the use of the second condenser 2b among the refrigerant amount recovered by the compressor 1 through Detects this by opening the overpressure discharge line (13a) to a certain amount of refrigerant to bypass (by-pass) to the liquid separator (6) that serves as a buffer tank.

Of course, by controlling the solenoid valve (S3) of the first recovery line (14a) to recover the amount of refrigerant from the first condenser (2a) as much as necessary for the use of the second condenser (2b), this type of flow rate Since not only a difficult operation of the solenoid valve S3 such as control is necessary, but also the amount of refrigerant required for the use of the second condenser 2b is not always kept constant due to the characteristics of the compressor 1 in which the load fluctuation range becomes large during operation. In the state where all the remaining refrigerant of the first condenser (2a) is recovered, it is more advantageous to prevent the increase in the internal pressure of the pipe and the overload of the compressor (1) by using the overpressure discharge line (13a).

Figure 4 shows a heat pump system 10 according to a second embodiment of the present invention, the discharge line extending from the compressor 1 based on the heat pump system 10 of the first embodiment shown in FIG. A flow path adjusting means including a four-way valve 8 is provided at 11, while a recovery line 14 extending from the evaporator 5 is connected to the liquid separator 6 via the four-way valve 8. It becomes a flow-changeable heat pump system.

In the drawing, the flow path adjusting means is a three-way valve 9 and a four-way valve 8 which are sequentially installed along the discharge line 11, and the first discharge line 11a extends from the four-way valve 8 to be formed. It is connected to the first condenser (2a), the second discharge line (11b) is extended from the three-way valve (9) is connected to the second condenser (2b).

In the heat pump system 10 according to the second embodiment of the present invention, the first and second recovery lines 14a and 14b correspond to the previous positions of the check valves C1 and C2. Branched from the first condensation line 12a and the second condensation line 12b, and connected to the recovery line 14 extending from the four-way valve 8 to the liquid separator 6, the overpressure discharge line 13a is provided. Is branched from the expansion line 13 corresponding between the receiver 3 and the expansion valve 4, and is then connected to the recovery line 14 extending from the four-way valve 8 to the liquid separator 6. .

In addition, as a means for switching the flow path of the refrigerant by using the four-way valve (8), the one-way check valve from the expansion line (13) between the expansion valve (4) and the evaporator (5) The reverse condensation line 18 having C4 is branched, and the reverse condensation line 18 is connected to the second condensation line 12b at a portion corresponding to the position beyond the check valve C2. The reverse condensation line 18 may be connected to the first condensation line 12a instead of the second condensation line 12b.

In addition, the expansion line 13 corresponding to the receiver 3 and the expansion valve 4 is provided with a one-way check valve C3, while between the check valve C3 and the receiver 3. The second expansion line 19 is branched from the expansion line 13 corresponding to the second expansion line 19 is a one-way check valve (C5), a line blocking solenoid valve (S6) and the second expansion valve ( In a state where 4a) is sequentially provided, it is connected to the first condensation line 12a corresponding to the previous position of the check valve C1.

The solenoid valve S6 installed in the second expansion line 19 is a flow receiver 3 in a general situation in which a flow path switching operation using the evaporator 5 as a condenser using the four-way valve 8 is not performed. It is installed to prevent the liquid refrigerant discharged to the expansion line 13 from the flow to the second expansion line (19).

However, since the internal pressure of the first condensation line 12a is blocked by the check valve C5 of the second expansion line 19, the outlet of the second expansion valve 4a of the second expansion line 19 is blocked. Even though the solenoid valve S6 is not installed in the second expansion line 19, the liquid refrigerant discharged from the receiver 3 along the expansion line 13 passes through the second expansion valve 4a to the second expansion line. It will not flow along (19).

Nevertheless, the second expansion line 19 is connected to the second expansion line 19 so that the unstable confrontation between the liquid refrigerants generated inside the second expansion line 19 is essentially blocked, thereby enabling a safer operation of the heat pump system 10. It is more advantageous to install the solenoid valve S6 for line cutoff, and the solenoid valve S6 is always kept closed except for the flow path switching of the refrigerant using the four-way valve 8.

In addition, the position of the check valve (C3) provided in the expansion line 13 may be any position before or after the branch point of the overpressure discharge line (13a), but reverse condensation during the flow path switching operation by the four-way valve (8) A part of the refrigerant to be supplied along the line 18 is prevented from flowing through the expansion valve 4 to the overpressure discharge line 13a corresponding to the position before the solenoid valve S5. It is preferable that the check valve C3 of) be installed at a position corresponding to the branch point of the overpressure discharge line 13a and the expansion valve 4.

Hereinafter, the working relationship of the present invention having the above-described configuration will be described in detail with reference to FIGS. 5 to 9. The other solenoid valves are in a closed state.

5 is a refrigerant flow diagram illustrating a process of producing 20 to 28 ° C. of warm water using the heat pump system 10 according to the first embodiment of the present invention, and the refrigerant gas discharged from the compressor 1. (Hot Gas) is supplied to the first condenser (2a) to produce the hot water in the condenser, the refrigerant condensed in this process is supplied to the evaporator (5) through the receiver (3) and expansion valve (4) After the recovery of the evaporation heat source, the process of flowing back from the evaporator (5) to the compressor (1) through the liquid separator (6).

In addition to the operation of the heat pump system 10 as described above, by opening the solenoid valve (S4) of the second circulation pipe (14b) connected to the second condenser (2b), the residual refrigerant in the second condenser (2b) The solenoid valve S4 of the second circulation pipe 14b is closed when the recovery of the residual refrigerant is completed, and the compressor 1 is recovered through the liquid separator 6 along the recovery line 14. Through this process, the phenomenon in which the refrigerant required for the use of the first condenser 2a is insufficient can be prevented.

6 is a refrigerant flow diagram illustrating a process of producing hot water of 50 to 60 ° C. using the heat pump system 10 according to the first embodiment of the present invention, and the refrigerant gas discharged from the compressor 1. (Hot Gas) is supplied to the second condenser (2b) to produce hot water from the condenser, and the refrigerant condensed in this process is supplied to the evaporator (5) through the receiver (3) and the expansion valve (4). After the recovery of the evaporation heat source, the process of flowing back from the evaporator (5) to the compressor (1) through the liquid separator (6).

In addition to the operation of the heat pump system 10 as described above, by opening the solenoid valve (S3) of the first circulation pipe (14a) connected to the first condenser (2a), the residual refrigerant in the first condenser (2a) The solenoid valve S3 of the first circulation pipe 14a is closed when the recovery of the residual refrigerant is completed, and the compressor 1 is recovered through the liquid separator 6 along the recovery line 14.

In addition, when the internal pressure rise of the pipe and the overload of the compressor 1 occur due to the amount of refrigerant exceeded for the use of the second condenser 2b among the amount of refrigerant recovered from the first condenser 2a, the pressure switch ( 13b) detects this and opens the solenoid valve S5 of the overpressure discharge line 13a so that a certain amount of refrigerant is bypassed to the liquid separator 6 serving as a buffer tank, and the system is normalized in the process. When the pressure switch 13b closes the solenoid valve S5 of the overpressure discharge line 13a.

7 is a refrigerant flow diagram illustrating a process of producing hot water of 20 to 28 ° C. using the heat pump system 10 according to the second embodiment of the present invention, and the three-way valve 9 from the compressor 1 is shown. And the refrigerant gas (hot gas) discharged through the four-way valve (8) to the first condenser (2a) to produce the hot water in the condenser, the refrigerant condensed in this process and the receiver (3) The evaporator 5 is recovered by being supplied to the evaporator 5 through the expansion valve 4 and then flowed back from the evaporator 5 to the compressor 1 via the four-way valve 8 and the liquid separator 6. do.

In addition to the operation of the heat pump system 10 as described above, by opening the solenoid valve (S4) of the second circulation pipe (14b) connected to the second condenser (2b), the residual refrigerant in the second condenser (2b) The solenoid valve of the 2nd circulation pipe 14b is made to collect | recover to the compressor 1 via the liquid separator 6 along the recovery line 14 extended from the four-way valve 8, and the recovery of residual refrigerant is completed. (S4) is closed, through this process it is possible to prevent the phenomenon that the refrigerant required for the use of the first condenser (2a) is insufficient.

8 is a refrigerant flow diagram illustrating a process of producing hot water of 50 to 60 ° C. using the heat pump system 10 according to the second embodiment of the present invention, and the three-way valve 9 from the compressor 1 is shown. After supplying the refrigerant gas (hot gas) discharged through the to the second condenser (2b) to produce hot water in the condenser, the refrigerant condensed in this process is connected to the receiver (3) and expansion valve (4) After being supplied to the evaporator 5 to recover the evaporation heat source, the evaporator 5 passes through the four-way valve 8 and the liquid separator 6 to the compressor 1 again.

In addition to the operation of the heat pump system 10 as described above, by opening the solenoid valve (S3) of the first circulation pipe (14a) connected to the first condenser (2a), the residual refrigerant in the first condenser (2a) It is to be recovered to the compressor 1 through the liquid separator 6 along the recovery line 14 extending through the four-way valve (8), the electrons of the first circulation pipe (14a) at the time when the recovery of the residual refrigerant is completed The valve S3 is closed.

In addition, when the internal pressure rise of the pipe and the overload of the compressor 1 occur due to the amount of refrigerant exceeded for the use of the second condenser 2b among the amount of refrigerant recovered from the first condenser 2a, the pressure switch ( 13b) detects this and opens the solenoid valve S5 of the overpressure discharge line 13a so that a certain amount of refrigerant is bypassed to the liquid separator 6 serving as a buffer tank, and the system is normalized in the process. When the pressure switch 13b closes the solenoid valve S5 of the overpressure discharge line 13a.

In the operation of the heat pump system 10 shown in FIGS. 7 and 8, the refrigerant supplied from the receiver 3 to the evaporator 5 via the expansion valve 4 does not flow to the reverse condensation line 18. The reason for this is that the low pressure passing through the expansion valve 4 is applied to the inlet side of the check valve C4 based on the check valve C4 of the reverse condensation line 18, and the check valve C4 is applied. Since a higher pressure is applied to the outlet side via the first condensation line 12a or the second condensation line 12b than the inlet side, the flow from the high pressure to the low pressure is blocked by the check valve C4 itself. This is because no reverse flow to high pressure occurs.

9 is a refrigerant flow diagram showing a flow path switching method utilizing the evaporator 5 as a condenser in the heat pump system 10 according to the second embodiment of the present invention. ) And the refrigerant gas (hot gas) discharged through the four-way valve (8) is supplied to the evaporator (5), and the refrigerant discharged from the evaporator (5) is supplied to the receiver (3) via the reverse condensation line (18). The refrigerant discharged from the receiver 3 is supplied to the first condenser 2a via the second expansion line 19 having the second expansion valve 4a and the first condensation line 12a. The first discharge line (11a), the four-way valve (8), the recovery line 14 and the liquid separator (6) is made of a process that is recovered to the compressor (1).

Even when the flow path switching heat pump system 10 operates as described above, the second condenser 2b is opened by opening the solenoid valve S4 of the second circulation pipe 14b connected to the second condenser 2b as necessary. The residual refrigerant inside may be recovered by the compressor 1, and the refrigerant flowing along the second expansion line 19 in FIG. 9 also does not flow to the receiver 3 through the condensation line 12. The reason is the same as the description based on the check valve C4 of the reverse condensation line 18 in FIGS. 7 and 8.

Although the operation of the flow path switching heat pump system 10 as shown in FIG. 9 is mainly utilized for defrosting to defrost the surface of the evaporator 5 during the winter, in the heat pump system for fish farms, It may also be used for the purpose of cooling the live fish water supplied to the aquaculture tank during the summer season in the first condenser (2a).

As described above, according to the heat pump system 10 of the present invention, the residual refrigerant in the condenser which is not used in the first condenser 2a and the second condenser 2b passes through the recovery line and the liquid separator 6, and then the compressor is used. By recovering the total amount to (1), even if the volume of the hot water condenser and the hot water condenser and the type of heat exchanger (double tube type, shell tube type, plate type, etc.) applied to each condenser are different, In operation it is easy to balance the overall balance of refrigerant for each condenser.

In other words, the heat pump system 10 is operated by adjusting the amount of refrigerant to the capacity of the first condenser 2a for medium temperature water whose size and volume are equal to or larger than the medium size, so that when the first condenser 2a is used, the second condenser for high temperature water ( The residual refrigerant of 2b) is recovered to prevent the shortage of the refrigerant and the deterioration of the performance of the first condenser 2a, and the internal pressure rise of the pipe due to the amount of refrigerant exceeded when the second condenser 2b is used and the compressor 1 When overload occurs, the pressure switch 13b opens the overpressure discharge line 13a so that a predetermined amount of refrigerant is bypassed to the liquid separator 6.

As a result, the efficient and safe operation of the heat pump system 10 is possible, and the current of the compressor 1 becomes very high when the second condenser 2b for high temperature water is used, and the refrigerant gas at the discharge side of the compressor 1 is very high. Even if the temperature rises above 100 ° C and the internal pressure of the pipe is formed at a high pressure, it is possible to continuously produce hot water without stopping the operation of the compressor 1 by using the overpressure discharge line 13a. will be.

10 shows a heat pump system 10 according to a third embodiment of the present invention, in which the flow path adjusting means including the four-way valve 8 is changed in the heat pump system 10 shown in FIG. The rest of the configuration is the same as that of the second embodiment shown in FIG.

In the heat pump system 10 shown in FIG. 10, the first discharge line (1) has four-way valves (8) and three-way valves (9) which are sequentially installed along the discharge line (11) as flow path adjusting means. 11a) and the second discharge line 11b extend from the three-way valve 9, and as shown by the virtual line in the figure, instead of installing the three-way valve 9, the four-way valve 8 It is also possible to provide solenoid valves in the first discharge line 11a and the second discharge line 11b branched from the discharge line 11, respectively.

When the above-described method is applied, when one of the first condenser 2a and the second condenser 2b is used to convert the flow path using the evaporator 5 as the condenser as shown in FIG. 9, the condenser may be used as the evaporator. It is also possible to use both the first condenser 2a and the second condenser 2b as an evaporator.

The above-described method corresponds to a selection of which condenser of the first condenser 2a and the second condenser 2b is to be used as the evaporator in consideration of the capacity of the evaporator 5 serving as the condenser. It is also possible to connect the second expansion line 19 with both the first condensation line 12a and the second condensation line 12b. In FIG. 10, the second expansion line 19 is provided for the purpose of distinguishing from the previous embodiment. ) Is connected to the second condensation line 12b.

11 and 12 are piping views showing the fourth and fifth embodiments of the present invention, for opening and closing the flow path from the overpressure discharge line 13a corresponding to the previous position of the overpressure shut-off solenoid valve S5. The third expansion line 20 having the solenoid valve S7 and the third expansion valve 4b is branched, and the third expansion line 20 is connected between the second condenser 2b and the check valve C2. It is to be connected to the second condensation line (12b) in a position corresponding to.

In addition, while the third recovery line 21 having the solenoid valve S9 is branched from the second discharge line 11b, the third recovery line 21 is connected to the evaporator 5 and the liquid in FIG. The recovery line 14 is connected to the recovery line 14 at a position corresponding to the separator 6, and in FIG. 12, the third recovery line 21 extends from the four-way valve 8 to the liquid separator 6. 14) is installed and connected.

As described above, the second condenser 2b can be utilized as the second evaporator. In this case, the inlet of the expansion valve 4 can selectively block the refrigerant flow through the evaporator 5 (FIG. 12). The solenoid valve S8 is additionally installed in the expansion line 13 corresponding to the check valve C3 and the expansion valve 4, and the rest of the configuration is the first embodiment shown in FIG. The configuration is the same as that of the second embodiment shown in FIG.

The second expansion line 20 may branch from the expansion line 13 at a position corresponding to the branch point of the overpressure discharge line 13a. In FIG. 12, the third recovery line 21 is an evaporator 5. It may also be installed in connection with the recovery line 14 extending from the four-way valve (8), in this case, the third recovery line (21) should be provided with a check valve for the reverse flow cutoff together with the solenoid valve (S9), The reason is to block the phenomenon that the high pressure refrigerant gas discharged from the compressor 1 through the ACE path during the flow path switching operation pushes back the solenoid valve S9 of the third recovery line 21 and flows back. When the solenoid valve S9 of the 3rd recovery line 21 is a manual valve, a check valve may not be provided.

As described above, the second condenser 2b is formed by the third expansion line 20 provided with the third expansion valve 4b and the solenoid valve S7 and the third recovery line 21 provided with the solenoid valve S9. Is connected to the overpressure discharge line (13a) and the low pressure recovery line (14), respectively, the fresh water of hot water of 50 ~ 60 ℃ or quenching water of 5 ~ 7 ℃ excellent excellent utilization as clean fresh water (sea water) Or it can be produced with medium temperature water (sea water), it is possible to provide a multifunctional heat pump system 10 that can be utilized for a variety of applications with excellent performance.

In other words, under the condition of cooling the sea water in the evaporator 5, the first condenser 2a produces medium-temperature water (breeding water) of 20 to 28 ° C., and the second condenser 2b is used as the second recovery line 14b. ) Or to recover the hot water of hot water of 50 ~ 60 ℃ by using the second condenser (2b) as a fresh water hot water heater and the remaining of the first condenser (2a) as the first recovery line (14a) The second condenser 2b is used for fresh water while the refrigerant is recovered and the internal pressure rise is suppressed by the overpressure discharge line 13a and the refrigerant flow into the evaporator 5 is blocked by the solenoid valve S8. The second evaporator, a quenching machine, can be used to produce quenched water at 5 ~ 7 ℃, and the first condenser 2a can produce 20 ~ 28 ℃ of medium temperature water (breeding water). Table 1 and Table 2 are summarized.

Operation state of the heat pump system based on Figure 11 Valve / Application Medium temperature water (first condenser)
Coolant (evaporator) Hot water supply hot water (the second condenser)
Coolant (evaporator) Quenched water (second condenser)
Medium temperature water (first condenser) Three way valve 1st condenser side open 2nd condenser side open 1st condenser side open Without S1, S2 S-1 ON OFF ON Without 3-way valve S-2 OFF ON OFF Without 3-way valve S-3 OFF ON OFF S-4 ON OFF OFF S-5 Automatic operation S-7 OFF OFF ON S-8 ON ON OFF S-9 OFF OFF ON

Operation state of the heat pump system based on Figure 12 (same as Figure 10) Valve / Application Medium temperature water (first condenser)
Coolant (evaporator) Hot water supply hot water (the second condenser)
Coolant (evaporator) Quenched water (second condenser)
Medium temperature water (first condenser) Four-way valve C-D discharge, E-F recovery C-D discharge, E-F recovery C-D discharge, E-F recovery Three way valve 1st condenser side open 2nd condenser side open 1st condenser side open Without S1, S2 S-1 ON OFF ON Without 3-way valve S-2 OFF ON OFF Without 3-way valve S-3 OFF ON OFF S-4 ON OFF OFF S-5 Automatic operation S-7 OFF OFF ON S-8 ON ON OFF S-9 OFF OFF ON

In addition, in winter, the first condenser (2a) produces breeding water of 20 to 28 ℃, or the second condenser (2b) to produce hot water of hot water (fresh water) of 50 to 60 ℃, the four-way valve in the summer Switch the refrigerant cycle to (8) to produce cool breeding water at 20-25 ° C. in the evaporator 5, or use quench water (fresh water) at 5-7 ° C. using the second condenser 2b as a second evaporator. When the water temperature management of the hydrostatic water tank in the fish farm is produced, by supplying hot water or hot water through the XL pipe in the hydrostatic water tank to perform winter warming or summer cooling, and indoor air-conditioning and air conditioning By supplying hot water or hot water through the heat exchange coil of the device, it can be utilized for a wide variety of applications such as winter heating or summer cooling.

Lastly, in the description of the present invention based on the drawings, all the opening and closing valves are solenoid valves S1 to S6 for the automation of the heat pump system 10, but the solenoid valve S5 installed in the overpressure discharge line 13a. The solenoid valve (S1, S2, S3, S4, S6) except for the) is installed as a manual valve if necessary to be able to operate the heat pump system 10 of the present invention manually.

1 Compressor 2 Condenser 2a First Condenser
2b: second condenser 3: receiver 4: expansion valve
4a: 2nd expansion valve 4b: 3rd expansion valve 5: Evaporator
5a: blower fan 6: liquid separator 7: refrigerant liquid zone
8: Four-way valve 9: Three-way valve 10: Heat pump system
11: discharge line 11a: first discharge line 11b: second discharge line
12 condensation line 12a first condensation line 12b second condensation line
13: expansion line 13a: overpressure discharge line 13b: pressure switch
14: recovery line 14a: first recovery line 14b: second recovery line
15: suction line 16: inlet pipe 17: discharge pipe
18: reverse condensation line 19: second expansion line 20: third expansion line
21: 3rd recovery line S1, S2, S3, S4, S5, S6, S7, S8, S9: Solenoid valve
C1, C2, C3, C4, C5: Check Valve

Claims (10)

delete The discharge line 11 extending from the compressor 1 branches into the first discharge line 11a and the second discharge line 11b via the flow path adjusting means, and the first discharge line 11a is connected to the first discharge line 11a. It is connected to the condenser (2a), the second discharge line (11b) is installed in connection with the second condenser (2b), one-way check valve (C1) from the first condenser (2a) and the second condenser (2b) A first condensation line 12a and a second condensation line 12b extending in a state having a (C2) are connected to the receiver 3 and provided with an expansion valve 4 from the receiver 3. An expansion line 13 extending in a state of being installed is connected to the evaporator 5, and a recovery line 14 extending from the evaporator 5 is connected to the liquid separator 6, and the liquid separator 6 is installed. In the heat pump system 10 in which the suction line 15 extending from the connection is connected to the compressor 1,
First and second recovery lines 14a and 14b including an on / off valve from the first condensation line 12a and the second condensation line 12b corresponding to the previous positions of the check valves C1 and C2. ) Are each branched,
The first recovery line 14a and the second recovery line 14b are connected to the recovery line 14 at a position corresponding between the evaporator 5 and the liquid separator 6,
An overpressure discharge line 13a having a solenoid valve S5 branches from the expansion line 13 corresponding to the receiver 3 and the expansion valve 4, and the overpressure discharge line 13a is an evaporator. Is connected to the recovery line 14 at a position between the (5) and the liquid separator (6),
Multifunction heat pump system, characterized in that the expansion line (13) or overpressure discharge line (13a) is installed with a pressure switch (13b) for the operation of the solenoid valve (S5). 3. The third expansion line (20) according to claim 2, wherein the third expansion line (20) having an on-off valve and a third expansion valve (4b) branches from the overpressure discharge line (13a) corresponding to the previous position of the solenoid valve (S5). The third expansion line 20 is connected to the second condensation line 12b at a position corresponding between the second condenser 2b and the check valve C2,
A third recovery line 21 having an open / close valve is branched from the second discharge line 11b, and the third recovery line 21 corresponds to a position between the evaporator 5 and the liquid separator 6. Installed in connection with the recovery line (14),
Multifunctional heat pump system, characterized in that the on-off valve is installed in the expansion line 13 corresponding to the branch between the overpressure discharge line (13a) and the expansion valve (4). According to claim 2 or 3, wherein the flow path adjusting means, the first discharge line (1) from the on-off valve or the discharge line (11) provided in the first discharge line (11a) and the second discharge line (11b), respectively. Multifunctional heat pump system, characterized in that the three-way valve (9) is installed at the position where the branch 11a) and the second discharge line (11b). The discharge line 11 extending from the compressor 1 branches into the first discharge line 11a and the second discharge line 11b via the flow path adjusting means including the four-way valve 8, and the first discharge line 11b. The discharge line 11a is installed in connection with the first condenser 2a, and the second discharge line 11b is installed in connection with the second condenser 2b. The first condenser 2a and the second condenser 2b are installed. And a first condensation line 12a and a second condensation line 12b extending from the state provided with one-way check valves C1 and C2, are connected to the receiver 3, and the receiver 3 is connected thereto. An expansion line 13 extending from the state with the expansion valve 4 to the evaporator 5 is installed, and the recovery line 14 extending from the evaporator 5 passes through the four-way valve 8 to the liquid. In the heat pump system 10 is installed in connection with the separator 6, the suction line 15 extending from the liquid separator 6 is connected to the compressor 1,
First and second recovery lines 14a and 14b including an on / off valve from the first condensation line 12a and the second condensation line 12b corresponding to the previous positions of the check valves C1 and C2. ) Are branched, and the first and second recovery lines 14a and 14b are connected to the recovery line 14 extending from the four-way valve 8 to the liquid separator 6,
A reverse condensation line 18 having a one-way check valve C4 branches from the expansion line 13 corresponding to the expansion valve 4 and the evaporator 5, and the reverse condensation line 18 is checked. It is connected to the first condensation line 12a or the second condensation line 12b at a portion corresponding to the position past the valves C1 and C2,
The expansion line 13 corresponding to the receiver 3 and the expansion valve 4 is provided with a one-way check valve C3, and corresponds between the check valve C3 and the receiver 3. The second expansion line 19 is branched from the expansion line 13,
The second expansion line 19 is a first condensation line corresponding to the previous position of the check valve (C1) (C2) in the state that the one-way check valve (C5) and the second expansion valve (4a) is provided in sequence 12a) or a second multi-condensation line (12b) is installed in connection with the multifunction heat pump system. The overpressure discharge line (13a) having a solenoid valve (S5) is branched from the expansion line (13) between the receiver (3) and the expansion valve (4), and the overpressure discharge is performed. Line 13a is installed in connection with the return line 14 extending from the four-way valve 8 to the liquid separator 6,
Multifunction heat pump system, characterized in that the expansion line (13) or overpressure discharge line (13a) is installed with a pressure switch (13b) for the operation of the solenoid valve (S5). The third expansion line (20) according to claim 6, wherein the third expansion line (20) having an on-off valve and a third expansion valve (4b) branches from the overpressure discharge line (13a) corresponding to the previous position of the solenoid valve (S5). The third expansion line 20 is connected to the second condensation line 12b at a position corresponding between the second condenser 2b and the check valve C2,
A third recovery line 21 having an open / close valve is branched from the second discharge line 11b, and the third recovery line 21 extends from the four-way valve 8 to the liquid separator 6. Is installed in connection with 14,
Multifunctional heat pump system, characterized in that the expansion valve (13) between the check valve (C3) and expansion valve (4) is installed on and off valve. 8. The flow passage adjusting means according to any one of claims 5 to 7, wherein the flow path adjusting means is a three-way valve 9 and a four-way valve 8 which are sequentially installed along the discharge line 11,
The first discharge line (11a) extends from the four-way valve (8), the second discharge line (11b) extends from the three-way valve (9),
Multifunctional heat pump system, characterized in that the second expansion line (19) is connected to the first condensation line (12a). 8. The valve according to any one of claims 5 to 7, wherein the flow path adjusting means is a four-way valve 8 and a three-way valve 9 which are sequentially installed along the discharge line 11,
The first discharge line (11a) and the second discharge line (11b) is a multifunctional heat pump system, characterized in that extending from the three-way valve (9). 8. The flow path adjusting means according to any one of claims 5 to 7, wherein the flow path adjusting means branches from a four-way valve 8 provided in the discharge line 11 and a discharge line 11 passing through the four-way valve 8. Multifunctional heat pump system, characterized in that the opening and closing valve of the first discharge line (11a) and the second discharge line (11b).

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