KR20110076558A - Hot and cool water generating apparatus using heat pump - Google Patents

Abstract

PURPOSE: A heat pump type cold and hot water generator is provided to control the temperature of a refrigerator for heat exchange with the outside air in connection with a decrease in the outdoor temperature to prevent defrost from being generated in a heat exchanger. CONSTITUTION: A heat pump type cold and hot water generator includes a compressor(10), a first heat exchanger(20), a first expansion valve(30), a second heat exchanger(40), a compensation heat exchange(36), a first valve(11), a second expansion valve(47), and a third heat exchanger(46). The first heat exchanger transfer the heat of a refrigerant coming out from the compressor to water to generate hot water. The first expansion valve expands the refrigerant heat-exchanged in the first heat exchanger. The compensation heat exchanger evaporates refrigerant by using a part of the hot water generated in the first heat exchanger. The third heat exchanger generates cold water through heat exchange with the refrigerant passing through the second expansion valve.

Description

Heat pump type cold and hot water generator {Hot and cool water generating apparatus using heat pump}

The present invention relates to a heat pump type cold and hot water generating device, and more particularly, by using the heat of the outside air and controlling the amount of the refrigerant delivered to the heat exchanger to evaporate the refrigerant in the heat exchanger and the cold and hot water at the same time and only the cold or hot water as necessary It relates to a heat pump type cold and hot water generator that can be generated.

1 shows a configuration of a heat pump type hot water generator according to the prior art. Such a hot water generating device is used in a facility that uses a lot of hot water, such as jjimjilbang, bath, swimming pool or large buildings.

Accordingly, while the refrigerant flows through the connecting pipe 7 between the compressor 1, the first heat exchanger 3, the expansion valve 5 and the second heat exchanger 6, the phase change occurs. Hot water is produced by receiving heat.

That is, in the first heat exchanger 3, the water supplied from the outside receives hot water from the refrigerant from the first heat exchanger 3 to become hot water and is connected to the first heat exchanger 3. Is delivered to. In addition, the second heat exchanger 6 receives heat for evaporation of the refrigerant from waste hot water that is used as hot water of the hot water tank 8. To this end a conduit 8 is connected to the second heat exchanger 6.

Reference numeral 2 is an oil separator for separating oil in the refrigerant, and 4 is a receiver for allowing only the refrigerant in the liquid state to be delivered to the expansion valve 5.

In this prior art, a working fluid of a high temperature and high pressure in a conventional state compressed by the compressor 1 is supplied to the first heat exchanger 3 to transfer heat to cold water transferred from the outside to make hot water to the hot water tank 8. To pass. At this time, the refrigerant is condensed into a liquid state of low temperature and high pressure.

The refrigerant condensed as described above is transferred to the receiver 4, and only the working fluid in the liquid state is transferred to the expansion valve 5 so as to be easily evaporated in the second heat exchanger. At this time, the refrigerant becomes a liquid state of relatively low temperature and low pressure. The expanded refrigerant is evaporated by receiving the heat of the waste hot water from the second heat exchanger (6) to a gas state of relatively high temperature and low pressure.

However, the above-described conventional techniques have the following problems.

In the prior art, the entire cycle can be operated only when the second heat exchanger 6 receives heat from the waste hot water. However, since the waste hot water is not always supplied in a constant amount, it is not possible to supply the amount of heat required to the second heat exchanger 6 at all times. Therefore, a problem arises in that the operation of the cycle is not smooth.

In order to solve this problem, the outside air may be used as a medium for providing heat to the refrigerant in the second heat exchanger 6. However, even when the outside air is used, if the outside air temperature drops relatively much, the heat supply is not properly supplied from the second heat exchanger 6 to the refrigerant, so that the refrigerant does not evaporate, and thus the cycle operation is not properly performed.

When a large temperature difference is generated between the refrigerant passing through the second heat exchanger 6 and the outside air, moisture contained in the outside air is condensed and frozen on the surface of the second heat exchanger 6, making it difficult to pass the outside air. The problem occurs that the operation of the second heat exchanger 6 is not properly performed.

In addition, in the prior art, only hot water is generated, but in the case of a swimming pool in summer, for example, cold water to be filled in a swimming pool and hot water required in a shower stall are simultaneously required. In this case, there is a need for a cold and hot water supply device that can supply as much cold and hot water as necessary.

Therefore, an object of the present invention is to solve the conventional problems as described above, in the heat pump type cold and hot water generator in which the refrigerant is evaporated by receiving heat from the outside air can generate both cold water and hot water at the same time or only as necessary It is to provide a cold and hot water generator.

Another object of the present invention is to adjust the temperature of the refrigerant for heat exchange with the outside air in conjunction with the decrease in the temperature of the outside air in the heat pump type hot water generator in which the refrigerant is evaporated by receiving heat from the outside air so as not to generate a drop in the heat exchanger It is.

According to a feature of the present invention for achieving the above object, the present invention is a compressor for compressing the refrigerant to make relatively high temperature and high pressure, and a first to transfer the heat of the refrigerant from the compressor to the water to create hot water A first expansion valve that expands the heat exchanger and the refrigerant heat-exchanged in the first heat exchanger to a relatively low temperature and low pressure state, and detects a state of the refrigerant delivered to the compressor to control the opening to adjust the amount of refrigerant passage. And a second heat exchanger for causing heat exchange between the refrigerant passing through the first expansion valve or the refrigerant delivered from the compressor and the outside air, and a refrigerant passing through the first heat exchanger to the first expansion valve. Receives a portion of the according to the temperature of the outside air to evaporate the refrigerant using a portion of the hot water produced in the first heat exchanger A first valve for allowing refrigerant from the compressor to selectively flow to a second heat exchanger through an upper heat exchanger and a first auxiliary connection pipe connecting an outlet of the compressor and an outlet of the second heat exchanger; Cold water is generated through heat exchange with a second expansion valve that receives the refrigerant that has passed through the first heat exchanger or the second heat exchanger and expands the refrigerant to a relatively low temperature and low pressure state, and a refrigerant that has passed through the second expansion valve. And a third heat exchanger.

A solenoid valve is provided between the compensating heat exchanger and the first heat exchanger to open when the outside air temperature drops below a predetermined value to transfer a portion of the refrigerant passing through the first heat exchanger to the compensating heat exchanger. Compensation expansion valve is provided between the compensation heat exchanger and expands the refrigerant to be delivered to the compensation heat exchanger.

When the refrigerant is transferred from the compressor to the second heat exchanger through the first auxiliary connection pipe and is heat-exchanged, a second auxiliary connection pipe is provided to transfer the refrigerant from the second heat exchanger to the receiver, and the second auxiliary connection pipe is provided. The sixth valve is installed to control the flow of the refrigerant.

A third check valve is installed in the second auxiliary connection pipe, and a third valve and a second check valve are respectively installed in the connection pipe connecting the outlet of the first heat exchanger and the inlet of the receiver. The check valve and the third check valve respectively flow the refrigerant only in the inlet direction of the receiver.

A fourth valve is installed at the inlet side of the first expansion valve to control the flow of the refrigerant, and a fifth valve is installed at the outlet of the second heat exchanger to control the flow of the refrigerant.

A seventh valve is installed at the inlet side of the second expansion valve to control the flow of the refrigerant.

In the heat pump type cold / hot water generator according to the present invention having such a configuration, the following effects can be obtained.

First, it is possible to generate the cold water and hot water required at the same time or only cold water or hot water, there is an effect that can fully satisfy the various requirements.

In the heat pump type cold / hot water generator that evaporates the refrigerant by using the outside air as a heat source, when the outside temperature falls below a certain temperature, the amount of the refrigerant that exchanges heat with the outside is reduced, and the remaining refrigerant receives heat from the hot water to evaporate. Since the refrigerant in the liquid state is prevented from entering the compressor, there is an effect that the operation of the cold / hot water generator is always performed smoothly.

In addition, in the present invention, when the outside air temperature falls below a certain temperature, the temperature compensation control is performed so that the temperature of the refrigerant heat-exchanging with the outside air becomes relatively small, so that the temperature of the refrigerant is equal to or higher than the dew point temperature of the outside air. Therefore, there is an effect that the dropping is not generated in the heat exchanger, there is no need to defrost operation, it is possible to continuously operate the cold and hot water generator.

Hereinafter, a preferred embodiment of a heat pump type cold / hot water generator according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows a preferred embodiment of the heat pump type cold and hot water generator according to the present invention. According to the embodiment of the present invention, the compressor 10, the first heat exchanger 20, the first first expansion valve 30, the compensation heat exchanger 36, the second heat exchanger 40, and the third heat exchange The group 46 is composed of a plurality of connecting pipes 10 ', 12', 20 ', 30', 36 ', 40', 40 ".

The compressor 10 is to compress the refrigerant to make a gas state of relatively high temperature and high pressure. The refrigerant compressed by the compressor 10 is delivered to the first heat exchanger 20 through a connection pipe 10 ′. When only the cold water is generated, it is transmitted to the second heat exchanger 40 through the first auxiliary connector 11 ′. The first auxiliary connector 11 ′ connects the outlet of the compressor 10 with the outlet of the second heat exchanger 40. The first auxiliary connection pipe 11 ′ is provided with a first check valve 11 c to allow the refrigerant to flow only toward the second heat exchanger 40.

The connecting pipe 10 'is divided into two, and each of the branched connecting pipes 11' and 12 'is provided with a first valve 11 and a second valve 12. The first valve 11 and the second valve 12 determine the direction in which the refrigerant flows according to the cold and hot water generation conditions. That is, in the state in which the first valve 11 is closed, the second valve 12 is opened to supply the refrigerant to the first heat exchanger 20 so that only cold water and hot water or hot water are generated. When the refrigerant is delivered to the second heat exchanger 40 while the second valve 12 is opened, only cold water is generated.

In the first heat exchanger (20), hot water is made by heat exchange between the refrigerant and water. The first heat exchanger 20 receives the refrigerant through the connection pipes 10 'and 12', and the refrigerant is discharged through the connection pipe 20 '. Water that exchanges heat with the refrigerant in the first heat exchanger 20 is transferred to the first heat exchanger 20 through a water inlet pipe 21 ′ and discharged through a hot water pipe 21 ″.

The refrigerant discharged from the first heat exchanger 20 is transferred to the receiver 22 through the connection pipe 20 ′. The receiver 22 serves to discharge only the refrigerant in the liquid state. Refrigerant discharged from the receiver 22 is delivered to the expansion valve (30, 35, 47) through a connecting pipe (22 ').

A third valve 23 and a second check valve 24 are installed in the connection pipe 20 ′ between the first heat exchanger 20 and the receiver 22. The second check valve 24 allows the refrigerant to flow out of the third valve 23 and only toward the receiver 22.

The first first expansion valve 30 expands the refrigerant released from the heat exchanger in the first heat exchanger 20 to make it in a good state for heat exchange in the second heat exchanger 40. Here, the first first expansion valve 30 makes the refrigerant at a low temperature and low pressure. A connection pipe 30 ′ is provided at an outlet of the first first expansion valve 30 to transfer the refrigerant to the second heat exchanger 40. The first first expansion valve 30 is installed in the connecting pipe 40 ″ to adjust the amount of refrigerant passing through the opening of the first expansion valve 30 due to the detection of the sensing unit 31 measuring the temperature of the refrigerant. The fourth valve 30s is installed to be connected to the inlet of the first first expansion valve 30 to control the flow of the refrigerant to the first first expansion valve 30.

The connecting pipe 22 ′ connected to the first expansion valve 30 is branched into the connecting pipe 33 ′, and the solenoid valve 33 is provided. The solenoid valve 33 serves to control the delivery of the refrigerant to the compensation heat exchanger 36. The solenoid valve 33 is opened and closed by sensing the temperature of the outside air, the opening temperature of the solenoid valve 33 is dependent on the operating conditions of the hot water generator, in the case of winter in Korea outside temperature is about 7 ℃ It's about.

A compensation expansion valve 35 is installed between the solenoid valve 33 and the compensation heat exchanger 36. The compensating expansion valve 35 serves to expand the refrigerant delivered to the compensating heat exchanger 36 so as to make a good heat exchange state in the compensating heat exchanger 36.

The compensation heat exchanger (36) prevents the refrigerant from being transferred to the compressor (10) in a liquid state because the refrigerant is not evaporated due to insufficient heat from the outside air when the temperature of the outside air is lowered, such as in winter.

A water supply pipe 50 ′ is connected to the compensation heat exchanger 36 to supply water of a predetermined temperature from the outside. In general, Korea needs to supply about 30 degrees of water in winter. To this end, the hot water made in the first heat exchanger 20 may be partially supplied to the water supply pipe 50 ′. The water inlet pipe 21 ′ is connected to the compensating heat exchanger 36 to transfer water from the compensating heat exchanger 36 to the first heat exchanger 20.

In the compensating heat exchanger 36, the refrigerant is discharged through the connection pipe 36 ′. The connection pipe 36 ′ is provided with an evaporation pressure valve 37. The evaporation pressure valve 37 has a mixing header 42 which will be described below only when the refrigerant from the compensating heat exchanger 36 has a predetermined pressure. To be delivered). That is, only the refrigerant in a desired state is delivered to the mixing header 42 to be mixed with the refrigerant coming out of the connection pipe 40 ′ in the second heat exchanger 40. The connecting pipe 40 ′ is provided with a fifth valve 40 s for controlling the refrigerant from the second heat exchanger 40 to be transferred to the compressor 10.

The refrigerant from the evaporation pressure valve 37 and the refrigerant from the second heat exchanger 40 are mixed in the mixing header 42. A predetermined space is formed inside the mixing header 42 to allow refrigerants to be mixed without generating vortices and transferred to the compressor 10 through the connecting pipe 40 ". Reference numeral 45 denotes a gas-liquid separator. As a role to ensure that only the refrigerant in the gaseous state can be delivered to the compressor (10).

On the other hand, a second auxiliary connector (20 ") is installed to connect the inlet of the receiver 22 and the inlet of the second heat exchanger (40), the second auxiliary connector (20") sixth valve 25s and a third check valve 25 are provided to control the flow of the refrigerant. The third check valve 25 allows the refrigerant to flow only from the second heat exchanger 40 side to the inlet of the receiver 22.

The third heat exchanger 46 is a portion for producing cold water, and the connection pipe 40 'connected to the outlet of the second heat exchanger 40 is connected to the outlet and the inlet side is connected to the outlet of the receiver 22. It is connected to the connecting pipe 22 '. The connection pipe 22 ′ is provided with a second expansion valve 47 for expanding the refrigerant entering the inlet side of the third heat exchanger 46, and a seventh valve at the inlet side of the second expansion valve 47. 48 is provided to control the flow of the refrigerant to the second expansion valve 47, that is, the third heat exchanger 46.

The connecting pipe 46 'connected to the outlet of the third heat exchanger 46 is connected to the connecting pipe 40' connected to the outlet of the second heat exchanger 40, that is, the inlet side of the compressor 10. A fourth check valve 46c is installed in the connecting pipe 46 'to allow the refrigerant to flow only in the direction of the compressor 10.

Water is introduced into the third heat exchanger 46 through the inlet pipe 49, and the water heat exchanged through the outlet pipe 49 ′, that is, the cold water, flows out.

The water supply source 50 serves to supply water for making hot water generated by the hot water generator. The water of the water supply source 50 is delivered to the first heat exchanger 20 through the water supply pipe 50 'via the compensation heat exchanger 36.

On the other hand, the hot water produced in the first heat exchanger 20 is collected and delivered to the hot water tank 60 through the hot water pipe 21 ". The hot water collected in the hot water tank 60 is used when necessary. The pipe 21 "and the water supply pipe 50 'are connected to each other and its communication is controlled through the mixing valve 64, which is a part of the hot water delivered through the hot water pipe 21" to the water supply pipe 50'. In order to make the temperature of the water delivered to the compensation heat exchanger 36 to a predetermined value or more, the reference numeral 62 denotes a water saving valve.

Hereinafter, the operation of the heat pump type cold / hot water generator according to the present invention having the configuration as described above will be described.

First, an operating state in which cold water and hot water are simultaneously generated will be described. In this case, the first valve 11 is closed and the refrigerant is not transmitted to the first auxiliary connecting pipe 11 ′. The first valve 11, the fourth valve 30s, the fifth valve 40s, and the sixth valve 25s are closed, and the second valve 12 and the third valve 23 are closed. And the seventh valve 48 is open. That is, while the heat exchange occurs in the first heat exchanger 20, the second heat exchanger 40 and the third heat exchanger 46, respectively, the first heat exchanger 20, the hot water, the third heat exchanger 46 ) Generates cold water. In FIG. 3, the flow of the refrigerant in a state where cold water and hot water are simultaneously generated is indicated by an arrow.

In order to explain this, in the embodiment of the present invention, the refrigerant is ideally compressed into the compressor 10 in a gaseous state, and transfers heat to water in the first heat exchanger 20 to produce hot water. Therefore, the refrigerant passing through the first heat exchanger 20 is at a low temperature and high pressure.

The refrigerant exiting the first heat exchanger 20 is delivered to the first expansion valve 30 through the connecting pipe 22 'only the refrigerant in the liquid state in the receiver 22. In the first expansion valve 30, the refrigerant is expanded to be relatively low temperature, low pressure, and evaporated to be transferred to the second heat exchanger 40 and the third heat exchanger 46.

In the second heat exchanger 40, the outside air and the refrigerant exchange heat with each other, and the refrigerant receives heat from the outside air and evaporates. The refrigerant evaporated in the second heat exchanger 40 is transferred to the gas-liquid separator 45 through the connection pipe 40 ', and in the gas-liquid separator 45, only the refrigerant in the gaseous state is transferred to the compressor 10. do. This process is a state in which the cold and hot water generator is operating normally.

However, when the temperature of the outside air is reduced, the amount of heat that the refrigerant can receive from the outside air in the second heat exchanger 40 is reduced, so that the refrigerant is not completely evaporated. That is, the degree of superheat of the coolant drops.

The state of the refrigerant is detected by the sensing unit 31 installed in the connecting pipe 40 ″, and the opening degree of the first expansion valve 30 is adjusted to be smaller by the sensing value of the sensing unit 31. When the opening degree of the first expansion valve 30 is adjusted to be small, the amount of refrigerant transferred to the second heat exchanger 40 through the first expansion valve 30 is reduced, so that Since the amount of heat required for evaporation is reduced, the refrigerant can be sufficiently evaporated even when the temperature of the outside air is lowered.

When the temperature of the outside air is lowered and the heat exchange between the refrigerant and the outside air is described above, and the refrigerant is not evaporated properly, the opening degree of the first expansion valve 30 is reduced to be transmitted to the second heat exchanger 40. The amount of refrigerant is reduced. Therefore, the pressure of the refrigerant in the second heat exchanger 40 drops, and the pressure and temperature are proportional to each other, so that the temperature of the refrigerant drops. When the temperature of the refrigerant drops too much, it passes through the second heat exchanger 40. May be lower than the dew point temperature of the outside air. In this case, moisture condenses on the surface of the second heat exchanger 40. That is, the enemy is made.

However, in the present invention, when the temperature of the outside air falls below a certain level, the solenoid valve 33 is opened so that the opening degree of the first expansion valve 30 is small, and thus the refrigerant cannot be transferred to the second heat exchanger 40. Is transferred to the compensation heat exchanger (36). This slightly increases the amount of the refrigerant delivered to the second heat exchanger 40, thereby slightly increasing the temperature of the refrigerant in the second heat exchanger 40 to be higher than the dew point temperature of the outside air. This prevents the occurrence of dropping and eliminates the need for a separate defrosting operation.

In more detail, this process, the refrigerant passing through the solenoid valve 33 is expanded in the compensation expansion valve 35 is made in a good state for heat exchange. Then, it is delivered to the compensation heat exchanger (36).

Water is delivered to the compensation heat exchanger 36 through the water supply pipe 50 '. The water is made and supplied at a temperature necessary for operation of the hot water generator, for example, about 30 ° C. The compensation heat exchanger 36 receives heat from the water and evaporates the refrigerant. The refrigerant evaporated in the compensating heat exchanger 36 is supplied to the mixing header 42 via the evaporation pressure valve 37 through the connecting pipe 36 '. The evaporation pressure valve 37 can be delivered to the mixing header 42 only when the refrigerant is above a predetermined pressure. In this way, since the refrigerant not transferred from the compensating heat exchanger 36 to the second heat exchanger 40 is evaporated, the refrigerant flows smoothly in the operation of the entire hot water generator, and the first heat exchanger 20 ) Can supply the amount of heat required to generate hot water.

In addition, the refrigerant that is overheated in the compensating heat exchanger 36 is mixed with the refrigerant that has passed through the second heat exchanger 40 in the mixing header 42. When operating in a state where the outside air temperature is relatively low, the refrigerant from the compensating heat exchanger 36 has a high pressure and temperature and is overheated, and the refrigerant from the second heat exchanger 40 is pressure and temperature. Is relatively low and its superheat is low. Therefore, when they are mixed with each other, the pressure and temperature are higher than the state of the refrigerant from the second heat exchanger 40, and the degree of superheat is also increased. Therefore, when the sensing unit 31 detects the state of the refrigerant, the opening degree of the first expansion valve 30 is increased.

That is, in fact, the supply of the refrigerant to the second heat exchanger 40 is slightly larger because the opening is slightly larger than the appropriate opening degree according to the outside air temperature, while the pressure and temperature of the refrigerant inside the second heat exchanger 40 are slightly increased. The temperature is higher than the dew point temperature of the outside air. Therefore, condensation of moisture on the surface of the second heat exchanger 40 is prevented.

On the other hand, as the cycle is operated as described above the heat exchange between the refrigerant and the water in the first heat exchanger 20, the temperature of the water is increased, the water is the hot water tank through the hot water pipe 21 " It is delivered to (60) and stored in the hot water tank (60) and used when necessary.

In addition, since the seventh valve 48 is open, a part of the refrigerant from the receiver 22 is expanded in the second expansion valve 47 and transferred to the third heat exchanger 46. The water introduced through the inlet pipe 40 by the heat exchange in the third heat exchanger 45 is lowered in temperature to become cold water of a desired temperature and is discharged through the outlet pipe 49 '.

The refrigerant leaving the third heat exchanger 46 is transferred to the gas-liquid separator 45 and the compressor 10 through the connection pipe 40 "through the fourth check valve 46c.

On the other hand, look at the operation of the present invention when cold water is no longer needed, only hot water. At this time, the first valve 11, the seventh valve 48 and the sixth valve 25s are closed. The closing of the seventh valve 48 is to block the refrigerant flow to the third heat exchanger (46). The second valve 12, the third valve 23, the fourth valve 30s, and the fifth valve 40s are opened to transfer the refrigerant to the first heat exchanger 20 and the second heat exchanger 40. Cycle to operate. At this time, the first heat exchanger 20 generates hot water while acting as a condenser, and the second heat exchanger 40 serves as an evaporator.

4, the refrigerant flow in the case of generating only hot water is indicated by an arrow. In this case, the refrigerant passes through the compressor 10, the first heat exchanger 20, the receiver 22, the first expansion valve 30, the second heat exchanger 40, and the gas-liquid separator 45. Is delivered. Of course, when the temperature of the outside air is low, as described above, some refrigerant is transferred to the compensation heat exchanger 46 by the opening operation of the solenoid valve 33.

Finally, the refrigerant flow in the case of generating only cold water is indicated by arrows in FIG. In this case, the first valve 11, the sixth valve 25s, and the seventh valve 48 are open, and the second valve 12, the third valve 23, the fourth valve 30s, and The fifth valve 40s is closed.

Therefore, the refrigerant is transferred to the second heat exchanger 40 through the first auxiliary connection pipe 11 '. Thus, the second heat exchanger 40 serves as a condenser. The refrigerant leaving the second heat exchanger 40 is delivered to the receiver 22 through the sixth valve 25s, and is transferred to the third heat exchanger 46 via the receiver 22 to exchange cold water. Will be generated. The refrigerant that has passed through the third heat exchanger 46 is transferred to the gas-liquid separator 45 and the compressor 10 through the connection pipe 46 'to the gas-liquid separator 45 and the compressor 10, and continues to cycle. .

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the present specification, the present invention is referred to as a cold / hot water generating device, but in fact, the cooling water can be cooled by cold water and heated by hot water.

In the illustrated embodiment, the first valve 11 and the second valve 12 are used at the same time, but in practice, the flow of the refrigerant may be controlled using only one of the two.

1 is a block diagram showing the configuration of a hot water generator according to the prior art.

Figure 2 is a block diagram showing the configuration of a preferred embodiment of a heat pump type cold and hot water generator according to the present invention.

Figure 3 is an operating state showing the flow of the refrigerant in the state of generating cold water and hot water at the same time in the present invention.

Figure 4 is an operating state diagram showing the flow of the refrigerant in the state of generating only hot water in the present invention.

5 is an operating state diagram showing the flow of the refrigerant in the state of generating only cold water in the present invention.

Explanation of symbols on the main parts of the drawings

10: compressor 10 ': connector

11: 1st valve 11 ': 1st auxiliary connector

12: second valve 20: first heat exchanger

21 ": hot water pipe 22: receiver

22 ': connector 23: third valve

24: second check valve 25: third check valve

25s: sixth valve 30: first expansion valve

30 ': connector 30s: fourth valve

33: solenoid valve 35: compensation expansion valve

36: compensating heat exchanger 37: evaporation pressure valve

40: second heat exchanger 40 ', 40 ": connector

40s: fifth valve 45: gas-liquid separator

46: third heat exchanger 47: second expansion valve

48: seventh valve 50: water supply source

60: hot water tank 62: water saving valve

64: mixing valve

Claims (6)

A compressor that compresses the refrigerant to a relatively high temperature and high pressure, A first heat exchanger for transferring hot water of the refrigerant from the compressor to water to produce hot water; A first expansion valve which expands the refrigerant exchanged by the first heat exchanger to a relatively low temperature and low pressure state, detects a state of the refrigerant delivered to the compressor, and adjusts an opening degree to adjust a refrigerant passage amount; A second heat exchanger for performing heat exchange between the refrigerant passing through the first expansion valve or the refrigerant delivered from the compressor and the outside air; A compensating heat exchanger that passes through the first heat exchanger and receives a portion of the refrigerant delivered to the first expansion valve according to the temperature of the outside air to evaporate the refrigerant using a portion of the hot water produced in the first heat exchanger; A first valve allowing the refrigerant from the compressor to selectively flow to the second heat exchanger through a first auxiliary connection pipe connecting the outlet of the compressor and the outlet of the second heat exchanger; A second expansion valve receiving the refrigerant from the first heat exchanger or the second heat exchanger and expanding the refrigerant to a relatively low temperature and low pressure; And a third heat exchanger configured to generate cold water through heat exchange with the refrigerant that has passed through the second expansion valve. 2. The solenoid valve according to claim 1, wherein between the compensation heat exchanger and the first heat exchanger, a solenoid valve is opened when the outside temperature drops below a predetermined value to transfer a portion of the refrigerant that has passed through the first heat exchanger to the compensation heat exchanger. And a compensation expansion valve is provided between the solenoid valve and the compensation heat exchanger to expand the refrigerant and transfer the refrigerant to the compensation heat exchanger. The method according to claim 2, wherein when the refrigerant is transferred from the compressor to the second heat exchanger through the first auxiliary connection pipe to exchange heat, the second auxiliary connection pipe is provided to transfer the refrigerant from the second heat exchanger to the receiver. The sixth valve is installed in the second auxiliary connection pipe to control the flow of the refrigerant characterized in that the heat pump type hot and cold water generating device. According to claim 3, wherein the second auxiliary connection pipe is provided with a third check valve, the connection pipe connecting the outlet of the first heat exchanger and the inlet of the receiver and the third valve and the second check valve, respectively Is installed, the second check valve and the third check valve is a heat pump type cold and hot water generator, characterized in that the refrigerant flows only in the inlet direction of the receiver, respectively. The method of claim 4, wherein a fourth valve is installed at the inlet side of the first expansion valve to control the flow of the refrigerant, and a fifth valve is installed at the outlet of the second heat exchanger to control the flow of the refrigerant. Heat pump type cold and hot water generator. The heat pump type hot and cold water generating device according to claim 5, wherein a seventh valve is installed at an inlet side of the second expansion valve to control the flow of the refrigerant.

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