KR20030053984A - High temperature quick boiling heat pump unit for producing hot water - Google Patents

Abstract

PURPOSE: A high temperature quick boiling heat pump unit is provided to stably supply warm water and hot water even in winter. CONSTITUTION: A compressor(20), a first condenser(21), a second condenser(22) and a first evaporator are connected with each other through a refrigerant tube(P1). A make-up water tank(26) is placed on one sides of the first condenser and the second condenser to be connected with the first condenser and the second condenser through a water tube(P2). Outlet sides of the first condenser and the second condenser are connected with a cooling tower(27) through a water tube(P4). A hot water tube(P3) is branched from the water tube to draw out hot water. A direction switching three-way valve(V1) is placed on the refrigerant tube on the outlet sides of the first condenser and the second condenser. A refrigerant tube(P5) is branched from the three-way valve to be connected with the refrigerant tube on an outlet side of the first evaporator. A direction switching two-way valve is placed on the refrigerant tube on the outlet side of the first evaporator. A water-cooled second evaporator(28) is placed on the refrigerant tube. A cold reservoir(29) storing cold water is placed on one side of the second evaporator to be connected with the second evaporator through a water tube(P6). A cooling fan coil unit(30) is placed on one side of the cold reservoir to be connected with the cold reservoir through a water tube(P7).

Description

High Temperature Quick boiling Heat Pump Unit for Producing Hot Water}

The present invention relates to a heat pump unit, and more particularly, to a high temperature hot water supply heat pump unit, which is capable of supplying hot water and hot water supply stably at all times even in winter when the temperature drops a lot.

Recently, a variety of refrigeration and air conditioning equipment is being supplied to supply fresh air in a general home or a building, and a lot of heat pump units that enable the use of cold and hot water throughout the year are widely used. In response to this trend, heat pump units are being developed for various purposes, and in particular, interest in energy-saving devices is increasing to reduce energy consumption, which is rapidly increasing in recent years.

1 is a system diagram showing an example of a conventional heat pump unit, and shows a configuration and an operation mode of an air-cooled heat pump unit.

As shown, the conventional air-cooled heat pump unit (H ₁ ) is basically composed of a compressor (1), a condenser (2), an evaporator (3) connected via a refrigerant pipe (4) through which refrigerant flows between them. The refrigerant pipe 4 at the outlet side of the condenser 2 is provided with an expansion valve 5, and the refrigerant pipe 4 at the outlet side of the evaporator 3 is provided with a gas-liquid separator 6. have. The evaporator (3) is provided on the outdoor unit (not shown) side, and is provided with an outdoor unit fan (3a) to discharge heat on one side.

One side of the condenser (2) is provided with a hot water tank (7) storing water, the hot water tank (7) and the condenser (2) are interconnected via a water pipe (8) through which water flows The hot water is circulated with each other, the water pipe (8) is provided with a circulation pump (8a) for pumping the water in the hot water tank (7) to convey to the condenser (2) side. In addition, the hot water tank (7) is connected to the water supply pipe (9) which is supplied with water from the outside when the storage water stored therein is insufficient.

Looking at the operation relationship of the conventional air-cooled heat pump system consisting of such a configuration as follows. On the other hand, compressors, condensers, evaporators, expansion valves and gas-liquid separators introduced from the above configuration are included in the known art, and thus detailed description thereof will be omitted.

The gas refrigerant introduced into the compressor is compressed to a high temperature and high pressure state, and the gas refrigerant at high temperature and high pressure has a close intermolecular distance, so that the condensation can be easily achieved even if heat is removed from the condenser during operation of the refrigeration cycle. The high temperature and high pressure gas refrigerant compressed by the compressor is cooled by a condenser to change phase into a liquid refrigerant, and the liquid refrigerant flows to the evaporator side. In this process, the high temperature and high pressure liquid refrigerant expands by an expansion valve to a low temperature and low pressure state, and the low temperature and low pressure liquid refrigerant passes through an evaporator. The evaporator absorbs heat from the outside and the low temperature low pressure liquid The refrigerant is changed into a gas refrigerant again. The phase-changed gas refrigerant is introduced into the compressor again in a pure gas state in which the liquid component is completely filtered while passing through the gas-liquid separator, thereby repeating the above cycle.

2 is a system diagram showing another example of a conventional heat pump unit, and shows a configuration and an operation mode of a water-cooled heat pump unit.

The same reference numerals are given to the same elements as in Fig. 1, and the new reference numerals are given only to the new elements, and detailed descriptions of the same elements will be omitted.

As shown, the conventional water-cooled heat pump unit (H ₂ ) is a structure provided with a water-cooled evaporator 10 instead of the air-cooled evaporator (3) provided in the air-cooled heat pump unit (H ₁ ) of FIG. consist of.

One side of the evaporator 10 is provided with a low temperature water tank 12 for storing cold water, one side of the low temperature water tank 12 is provided with a cold bath 14 to supply cold water, the evaporator 10 and The low temperature water tank 12 and the low temperature water tank 12 and the cold water bath 14 are connected to each other through the water pipes 11 and 13 so that the cold water circulates.

However, in such a conventional heat pump unit, when the temperature drops too much in winter, there is a problem that it is impossible to supply a stable hot water and hot water supply because the heat exchange capacity of the evaporator is lowered and the compression performance is lowered.

The present invention has been made to solve the conventional problems as described above, and an object of the present invention is to provide a high temperature hot water supply heat pump unit having a structure capable of supplying stable hot water and hot water supply even in the winter when the temperature is much lower.

1 is a system diagram showing an example of a conventional heat pump unit

2 is a system diagram showing another example of a conventional heat pump unit

Figure 3 is a schematic diagram showing a high temperature hot water supply heat pump unit of the present invention

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

H ₃ : high temperature hot water heat pump unit 20: compressor

21,22 Condenser 23,28 Evaporator

24 expansion valve 25 gas-liquid separator

26: hot water tank 27: cooling tower

29: low temperature water tank 30: heat coil unit

P ₁ , P ₅ P ₈ : Refrigerant piping P ₂ , P ₄ , P ₆ , P ₇ : Water piping

P ₃ : Hot water supply pipe P ₉ : Pressure sensing pipe

P ₁ a: Capillary P ₂ b, P ₆ a, P ₇ a, P ₇ b, P ₈ a: Circulation pump

P ₂ c: Pressure saving valve P ₃ a, P ₄ a: On-off valve

V ₁ : 3-way valve V ₂ : 2-way valve

P ₈ a: Capacity regulator

In order to achieve the above object, the present invention provides a compressor, a condenser, and a first evaporator connected to each other through a refrigerant pipe, and a supply water tank is provided at one side of the condenser, so that the condenser and the supply water tank may include a water pipe. In the high temperature hot water heat pump unit interconnected by a medium, the outlet side of the condenser is connected to the cooling tower via a water pipe, the hot water supply pipe for branching the hot water supply for use is branched, The outlet refrigerant pipe is provided with a three-way valve for directional switching, and the refrigerant pipe is branched from the three-way valve to connect the refrigerant pipe to the outlet refrigerant pipe of the first evaporator, and the outlet refrigerant of the first evaporator. The piping is provided with a two-way valve for switching direction, the refrigerant pipe is provided with a water-cooled second evaporator, one side of the second evaporator low temperature stored cold water A water tank is provided so that the second evaporator and the low temperature water tank are connected to each other via a water pipe, and one side of the low temperature water tank is provided with a cooling coil unit so that the low temperature water tank and the heat coil unit are connected to each other through a water pipe. Provided is a high temperature hot water supply heat pump unit.

In addition, the present invention is characterized in that the first evaporator and the second evaporator is to operate alternatively.

In addition, the present invention is provided with an on-off valve in the hot water supply pipe and the water pipe, respectively, when the hot water production, the on-off valve is opened, the on-off valve is closed, the two-way valve is open, when cold water production The on-off valve is closed, the on-off valve is open, the two-way valve is closed, when producing cold and hot water at the same time the on-off valve is opened, the on-off valve is closed, the two-way valve is closed It is characterized by.

In addition, the condenser in the present invention is characterized in that the water temperature of the inlet side is in the range of 5 ℃ to 20 ℃, and the water temperature of the outlet side is in the range of 65 ℃ to 70 ℃ so that the temperature of the water to be used for hot water supply and heating do.

The present invention is a specific example, the inlet-side refrigerant pipe of the three-way valve is provided with a capillary tube for producing hot water using the high temperature sensible heat of the condenser, the pressure pipe for adjusting the flow rate of water supplied to the condenser side It is characterized in that the water-saving valve is provided.

According to a more specific example of the present invention, a refrigerant pipe is branched and interconnected to an outlet refrigerant pipe of the compressor and an inlet refrigerant pipe of the first evaporator, and the refrigerant pipe is provided with a low pressure compensation capacity regulator. One side of the city regulator is branched pressure sensing pipe for sensing the pressure of the outlet of the first evaporator is connected to the refrigerant pipe of the outlet side of the first evaporator, the capacity regulator is the outlet side of the first evaporator When the pressure is below a predetermined pressure, the refrigerant pipe is opened to switch the refrigerant of high temperature and high pressure into the refrigerant pipe of the inlet side of the first evaporator, and to compensate the pressure of the outlet side of the first evaporator to a predetermined pressure level or more. .

In addition, the present invention is characterized in that the condenser and the second evaporator comprises at least one material of a copper tube and a stainless steel sheet is not corrosive.

The high temperature hot water heat pump unit of the present invention as described above is composed of a complex structure of a water-cooled evaporator and an air-cooled evaporator, and by providing a structure equipped with a capacity regulator, a capillary tube, a low pressure compensation valve, etc. Water can be supplied.

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

The same reference numerals are given to the same components as those of the prior art, and only the new components are given the new reference numerals, and detailed descriptions of the same components are omitted.

3 is a system diagram showing a configuration and an operation mode of a high temperature hot water supply heat pump unit of the present invention. The present invention is a high temperature combination of a conventional air-cooled heat pump unit (H ₁ ) and a water-cooled heat pump unit (H ₂ ). A hot water supply heat pump unit (H ₃ ) is provided.

The hot water supply heat pump unit (H ₃ ) is basically a compressor 20, a plurality of condensers (21, 22) and evaporators (23, 28), hot water tank (26), low temperature water tank (29), heat coil unit 30 and the like.

More specifically, the compressor 20, the first and second condensers 21 and 22 arranged side by side, and the first evaporator 23 provided on the outdoor unit side (not shown) may use a refrigerant pipe P ₁ . a cross-linked and forms a structure, the first and second condensers (21, 22) the outlet side of the refrigerant pipe (P ₁₎ is provided with an expansion valve 24, the first evaporator 23, the outlet side of the refrigerant pipe P ₁ is provided with a gas-liquid separator 25.

One side of the first and second condensers 21 and 22 is provided with a feed water tank 26 for temporarily storing direct water supplied from the outside, so that the first and second condensers 21 and 22 and the feed water tank 26 are provided. a water pipe (P ₂₎ of which are interconnected as a medium, on-off valve (P ₂ a) of controlling the outlet side of the diffusion tank 26 to the water pipe (P _2), the warm water or hot water can be produced And a circulation pump P ₂ b for pumping water inside the replenishment water tank 26 to flow to the first and second condensers 21 and 22 and a condenser (P ₂ b). 21, 22) is provided with a pressure saving valve (P ₂ c) for controlling and supplying a flow rate of water flowing into the inside.

The outlet side of the first and second condensers 21 and 22 is connected to the cooling tower 27 via a water pipe P ₄ to dissipate and cool the hot water of high temperature when only cold water is used. At the outlet side water pipe P ₄ of the cooling tower 27 so that the water cooled in the first and second condensers 21 and 22 is circulated to the outlet side of the feed water tank 26, that is, the first and second condensers 21 and 22. It is connected to the inlet-side water pipe (P ₂ ) of the condenser (21, 22). In addition, the hot water supply pipe (P ₃ ) for drawing and using the hot water is branched into the outlet water pipe (P ₄ ) of the first and second condensers (21, 22), the hot water supply pipe (P ₃ ) And the water pipe (P ₄ ) is provided with an on-off valve (P ₃ a) (P ₄ a, P ₄ b), respectively.

The three-way valve (V ₁ ) for direction switching is provided at the outlet refrigerant pipe (P ₁ ) of the condenser (21, 22), and the refrigerant pipe (P ₅ ) is branched to the three-way valve (V ₁ ). The refrigerant pipe P ₅ is connected to the outlet refrigerant pipe P ₁ of the first evaporator 23. In addition, the outlet refrigerant pipe P ₁ of the first evaporator 23 is provided with a two-way valve V ₂ for direction switching, and the refrigerant pipe P ₅ has a water-cooled second evaporator 28. ) Is provided. In addition, one side of the second evaporator 28 is provided with a low temperature water tank 29 in which cold water is stored so that the second evaporator 28 and the low temperature water tank 29 are interconnected via a water pipe P ₆ , One side of the low temperature water tank 29 is provided with a cooling heat coil unit 30, the low temperature water tank 29 and the heat coil unit 30 is connected to each other via a water pipe (P ₇ ). In addition, the inlet-side refrigerant pipe P ₁ of the three-way valve V _{1 maintains} the flow rate of the hot refrigerant discharged from the condensers 21 and 22 to stay in the first and second condensers 21 and 22. Capillary tube P ₁ a is provided to allow the production of hot water by sensible heat of the hot refrigerant while extending the time.

In addition, one side of the second evaporator 28 is provided with a low temperature water tank 29 for storing cold water, and one side of the low temperature water tank 29 is a heat coil unit 30 for cooling water in the low temperature water tank 29. ) Is provided, and the second evaporator 28 and the low temperature water tank 29, and the low temperature water tank 29 and the coil unit 30 are interconnected via water pipes P ₆ and P _7, respectively. Cold water is circulated structure. The water pipe P ₆ is provided with a circulation pump P ₆ a for pumping cold water in the low temperature water tank 29 to circulate to the second evaporator 28.

On the other hand, in the high temperature hot water heat pump unit (H ₃ ) of the present invention, the refrigerant pipe (P ₈ ) branched to the refrigerant pipe (P ₁ ) at the outlet side of the compressor (30) so that the refrigerant pipe (P ₈ ) is the first evaporator. (23) is connected to the inlet refrigerant pipe (P ₁ ), the refrigerant pipe (P ₈ ) when the outlet pressure of the first evaporator 23 is below a predetermined pressure, the refrigerant pipe (P ₈ ) is opened by A low pressure compensation capacity regulator for switching the high temperature and high pressure refrigerant to the inlet refrigerant pipe P ₁ of the first evaporator 23 and compensating the outlet pressure of the first evaporator 33 to a predetermined pressure level or more ( P ₈ a) is provided, and at one side of the capacity regulator P ₈ a, a pressure sensing pipe P ₉ for branching the outlet pressure of the first evaporator 23 is branched to the pressure sensing pipe P ₉ ) is connected to the refrigerant pipe P _{1 at} the outlet side of the first evaporator 23.

In addition, the high temperature hot water supply heat pump unit (H ₃ ) of the present invention, unlike the condenser 2 is made of a carbon steel pipe for pressure piping in the heat pump unit (H ₁ ) (H ₂ ) of the prior art, 2 The material of the condenser 21 and 22 and the 2nd evaporator 28 is comprised using the copper tube and / or stainless steel plate which are not corrosive.

Looking at the operating relationship of the high temperature hot water supply heat pump unit (H ₃ ) of the present invention having the configuration as described above, the high temperature and high pressure gas refrigerant compressed by the compressor 20 is cooled by the condenser (21, 22) to the liquid refrigerant Phase-change, the liquid-changed phase is sent to the second evaporator 28 by the three-way valve (V ₁ ) to phase the gas refrigerant at low temperature low pressure by heat exchange with cold water carried from the low temperature water tank (29). Will change. The gas refrigerant passes through the gas-liquid separator 25 and flows back into the compressor 20 in the pure gas state in which the liquid component is completely filtered, thereby repeating the above cycle.

Meanwhile, the heat coil unit 30 recovers the cold water from which the temperature is lowered by the heat exchange in the second evaporator 28 and the temperature is lowered from the low temperature water tank 29, and heats it to the outside air to raise the temperature again. The cold water heated up by the heat coil unit 30 is returned to the low temperature water tank 29 to maintain the water in the low temperature water tank 29 at a constant temperature.

In the high temperature hot water supply heat pump unit H ₃ of the present invention, the first evaporator 23 and the second evaporator 28 may be selectively operated by controlling the flow direction of the refrigerant by the three-way valve V ₁ . Bar, when cold water is required, the second evaporator 28 is used. When cold water is not needed, such as winter, the first evaporator 23 is used, and the two-way valve provided in the pipe P ₅ is used. (V ₂ ) is opened upon operation of the first evaporator 23 and closed upon operation of the second evaporator 28.

In addition, the high temperature hot water supply heat pump unit (H ₃ ) of the present invention is the on-off valve (P ₃ a) (P ₂ a) is opened during the hot water supply and hot water production, the opening and closing valve (P ₄ a, P ₄ b) ) Is closed, the two-way valve (V ₂ ) is open, the on-off valve (P ₃ a) (P ₂ a) is closed when the cold water production, the on-off valve (P ₄ a, P ₄ b) Is open, the two-way valve (V ₂ ) is closed, when the hot and cold water is produced at the same time the on-off valve (P ₃ a) (P ₂ a) is open, the on-off valve (P ₄ a, P ₄ b) is closed and the two-way valve V ₂ is closed.

On the other hand, the liquid refrigerant which is directionally switched to the first or second evaporator (23, 28) by the three-way valve (V ₁ ) is phase-changed to gas refrigerant by heat exchange, and then conveyed to the compressor 20 again The cycle will be repeated.

As described so far, the hot water hot water heat pump unit H ₃ of the present invention has a structure capable of producing all of hot water, cold water, and hot water, in particular, the water temperature supplied from the replenishment water tank 26 is 5 ° C. to The water in the range of 20 ℃ is heat exchanged with the refrigerant passing through the condenser (21, 22) and rapidly rises to a temperature in the range of 65 ℃ to 70 ℃, which can be used as a hot water or withdrawn to the room to use for heating Will be.

In addition, the high temperature hot water supply heat pump unit (H ₃ ) can be applied to residential or commercial buildings and can be used by attaching to existing hot water supply equipment units in places where hot water, such as baths, swimming pools, hotels, hot springs, greenhouses, chemical plants. have.

In addition, the high temperature hot water supply heat pump unit (H ₃ ) of the present invention can be used by configuring the low temperature water tank 29 in a known cooling storage structure.

Since the high temperature hot water heat pump unit (H ₃ ) of the present invention does not require a separate combustion facility such as a burner or a boiler, the installation cost is low, and electricity is used as a power source, so there is no fear of generating waste or waste gas, thereby preventing pollution. Will be.

In addition, the high temperature hot water heat pump unit (H ₃ ) is provided with a plurality of double-tube condenser provided a more stable cycle than the conventional heat pump unit having a single condenser and can produce a higher temperature as well as It can also extend its life.

In addition, the present invention is configured by using a copper tube and a stainless steel sheet having a corrosion resistance material of the condenser and the second evaporator it is possible to prevent corrosion that may occur during long-term use.

As described above, the high temperature hot water heat pump unit of the present invention is composed of a complex structure of a water-cooled evaporator and an air-cooled evaporator, and provides a structure that is equipped with a capacity regulator, a capillary tube, a low pressure compensation valve, etc. Hot water can be supplied.

In addition, the high temperature hot water heat pump unit of the present invention is simple in structure and easy to use, which makes it possible to create an ideal cooling and heating and hot water environment, and also operates by electricity, thereby preventing pollution by not discharging any waste gases such as NOX and CO2. You can do it.

Claims (7)

The compressor 20, the condensers 21 and 22, and the first evaporator 23 are interconnected through the refrigerant pipe P ₁ , and the feed water tank 26 is connected to one side of the condenser 21 and 22. It is provided that the condenser (21, 22) and the feed water tank 26 are interconnected via a water pipe (P ₂ ), the outlet side of the condenser (21, 22) via a water pipe (P ₄ ) It is connected to the cooling tower 27, the water supply pipe (P ₄ ) is branched to the hot water supply pipe (P ₃ ) for drawing and using the hot water, the refrigerant pipe (P ₁ ) of the outlet side of the condenser (21, 22) ) Is provided with a three-way valve (V ₁ ) for direction switching, the refrigerant pipe (P ₅ ) is branched from the three-way valve (V ₁ ) so that the refrigerant pipe (P ₅ ) of the first evaporator (23) is connected to an outlet side refrigerant line (P _1), the second is equipped with two-way valve (V ₂₎ for the directional control the outlet-side refrigerant pipe (P ₁₎ of the first evaporator 23, the refrigerant pipe (P ₅₎ The second evaporator 28 of the water cooling system is provided, the second increase One side of the erection 28 is provided with a low temperature water tank 29 in which cold water is stored so that the second evaporator 28 and the low temperature water tank 29 are interconnected via a water pipe P ₆ , and the low temperature water tank 29 At one side of the) is provided with a cooling heat coil unit (30), the high temperature hot water heat pump unit, characterized in that the low temperature water tank (29) and the heat coil unit (30) are interconnected via a water pipe (P ₇ ). The method of claim 1, High temperature hot water heat pump unit, characterized in that the first evaporator (23) and the second evaporator (28) are to be operated alternatively. The method of claim 1, The hot water supply pipe (P ₃ ) and the water pipe (P ₂ ) (P ₄ ) is provided with an on-off valve (P ₃ a) (P ₂ a) (P ₄ a, P ₄ b), respectively, when producing hot water The on-off valve (P ₃ a) (P ₂ a) is opened, the on-off valve (P ₄ a, P ₄ b) is closed, the two-way valve (V ₂ ) is opened, when the cold water production The on / off valve P ₃ a (P ₂ a) is closed, the on / off valves P ₄ a, P ₄ b are open, the two-way valve V ₂ is closed and cold and hot water can be produced simultaneously. When the on-off valve (P ₃ a) (P ₂ a) is open, the on-off valve (P ₄ a, P ₄ b) is closed, the two-way valve (V ₂ ) is characterized in that the closed High temperature hot water heat pump unit. The method of claim 1, The condenser 21, 22 is characterized in that the water temperature on the inlet side is in the range of 5 ° C to 20 ° C and the water temperature on the outlet side is in the range of 65 ° C to 70 ° C so that the temperature of the water is raised to be available for hot water supply and heating High temperature hot water heat pump unit. The method of claim 1, The inlet-side refrigerant pipe (P ₁ ) of the three-way valve (V ₁ ) is provided with a capillary pipe (P ₁ a) for producing hot water using the high temperature sensible heat of the condenser (21, 22), the water pipe (P _2), the high temperature hot water supply heat pump unit, characterized in that a water saving valve comprising a pressure (P c ₂₎ for regulating the flow rate of water supplied toward the condenser (21, 22). The method of claim 1, The outlet-side refrigerant pipe (P ₁₎ and the refrigerant piping (P _8), wherein the inlet-side refrigerant pipe of the first evaporator (23) (P ₁₎ of said compressor (30) branches being interconnected, wherein the refrigerant pipe (P ₈₎ There is provided the capacitive City regulator (P ₈ a) for the low-pressure compensation, the capacitance City regulator (P ₈ a) of one side of the outlet-side pressure-sensing pipe for sensing the pressure of the first evaporator (23) (P ₉ ) Branched so that the pressure sensing pipe (P ₉ ) is connected to the outlet side refrigerant pipe (P ₁ ) of the first evaporator (23), the capacity regulator (P ₈ a) is the outlet of the first evaporator (23) When the side pressure is less than or equal to a predetermined pressure, the refrigerant pipe P ₈ is opened to switch the refrigerant having a high temperature and high pressure into the refrigerant pipe P ₁ at the inlet side of the first evaporator 23 and the outlet of the first evaporator 33. The hot water supply heat pump unit, characterized in that to compensate the side pressure to a predetermined pressure level or more. The method of claim 1, The condenser (21, 22) and the second evaporator (28) is a high temperature hot water supply heat pump unit, characterized in that it comprises at least one material of a copper tube and a stainless steel plate without corrosion.