KR20110022984A - Thermal storage system for heat pump - Google Patents

Abstract

PURPOSE: A thermal storage system for a heat pump is provided to improve heating-cooling efficiency by reduction in the peak load of a heat pump cooling and heating system. CONSTITUTION: A thermal storage system(100) for a heat pump comprises a thermal storage tank, a first discharge line, a first supply line(120), a second discharge line(140), a second supply line(150), and a controller. The thermal storage tank comprises a temperature partition. Hot water and cold water stored in the tank are separated by the temperature partition. The temperature partition moves inside the tank according to the inflow of the hot and cold water. The first discharge line discharges the stored water. The first supply line supplies the water which is heated or cooled by the heat pump. The second discharge line discharges the stored water to the heap pump. The second supply line supplies the water which is heated or cooled in facility. The controller opens and closes valves, formed in the first supply line, the first discharge line, the second supply line, and the second discharge line, according to sensing signals received from a proximity sensor formed in the thermal storage tank.

Description

Shrinkage heat system for heat pump {THERMAL STORAGE SYSTEM FOR HEAT PUMP}

The present invention relates to a shrinkage bath system.

In general, the contraction heat tank system is a device for generating cold and warm heat by using a heat pump to store thermal energy in the form of cold water or hot water, and then supply cold water or hot water to a farm house. In particular, the shrinkage heat system is mostly used to form a shrinkage heat bath for the peak load of the water (geothermal) heat pump.

However, the conventional contraction heat bath is used with a diffuser (temperature separator) installed. That is, hot water (constant temperature 45 or 48 ° C.) at the upper end of the shrinkage heat bath is used for heating the house, and cold water (at −5 ° C. of the upper end constant temperature at the lower end) of the shrinkage heat bath is used as heat pump heat exchange water.

Shrinkage bath with a conventional dehumidifier, the fixed heat sink is installed to prevent the temperature balance in the shrinkage heat bath by forced convection when used in cooling and heating by storing or pumping the shrinkage hot water in one shrinkage heat tank, The upper and lower temperature deviation can be maintained in a short time, but the lower temperature is fluctuating greatly, and the automatic valve related to the shrinkage heat bath requires eight or more temperature control methods.

In particular, in the conventional contraction heat bath as described above, the coefficient of performance (COP: Coefficient Of Performance) is the maximum when the cooling / heating is started, there is a problem that the efficiency is not good because the conversion to the minimum when the cooling / heating is finished.

An object of the present invention for solving the above problems is to provide a heat shrinkage system for a heat pump, so that the size of the inner space of the shrinkage heat tank in which cold water and hot water are stored can be changed without the power drive.

The present invention for achieving the above object, the hot water and cold water stored in the tank is separated by a temperature separation plate, the temperature separation plate is a shrinkage heat tank which is formed to be movable in the tank according to the inflow of hot water and cold water; A first discharge line formed on a first side of the contraction heat tank and configured to discharge water stored by the first side and the temperature separation plate to a facility; A first supply line formed on the first side to supply water heated or cooled by a heat pump to a space defined by the first side and the temperature separation plate; A second discharge line formed on the second side of the contraction heat tank and discharging the water stored by the second side and the temperature separation plate to the hip pump; A second supply line formed on the second side and spaced by the second side and the temperature separation plate, for supplying water heated or cooled in a facility; And a control unit for opening and closing a valve formed in the first supply line, the first discharge line, the second supply line, and the second discharge line according to a detection signal received from the proximity sensor formed in the contraction heat tank. do.

The present invention allows the size of the inner space of the contraction heat tank in which cold water and hot water are stored to be changed without power driving, thereby increasing the heating and cooling efficiency of the facility while reducing the peak load in the heat pump cooling and heating system using hydrothermal, geothermal and air heat. Has the effect. That is, in the present invention, the heating and cooling COP is increased by about 10%, the energy saving effect reaches about 10%. In detail, the present invention has the effect of saving energy by maintaining a constant heating and cooling COP in a high state while reducing the peak heating and cooling facilities.

In addition, the present invention is a heat pump shrinkage heat system that can be in charge of heating and heating peak load in a farm house, etc., easy to install at a low price, four automatic valves can be combined temperature / displacement control of the shrinkage heat tank In other words, the efficiency of the heat pump can be increased permanently.

In addition, the present invention uses a shrinkage heat tank that can be in charge of peak heating load of the facility, serves to store two heat storage by one shrinkage heat tank, the operation of the temperature separation plate by the hydraulic pressure high / low temperature water mechanically It has the effect of separating and maintaining the heating and cooling COP at the maximum state during the heat pump operation, and having the heat pump temperature / displacement combined control function.

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

1 is a perspective view of one embodiment of a shrinkage heat system for a heat pump according to a first embodiment of the present invention, Figure 2 is a configuration diagram of one embodiment of a shrinkage heat system for a heat pump according to a first embodiment of the present invention. .

The shrinkage heat system for a heat pump according to the present invention is to increase the heating and cooling efficiency of various kinds of facilities (such as farmhouses) while reducing the peak load in a heat pump air-conditioning system using water heat, geothermal heat, and air heat, FIGS. 1 and FIG. As shown in FIG. 2, the hot water and cold water stored in the tank are separated by a temperature separation plate, and the temperature separation plate is formed to be movable within the tank according to the inflow amount of hot water and cold water. A first discharge line 120 formed on the first side of the contraction heat tank and configured to discharge the water stored by the first side and the temperature separation plate to the outside (facility); A first supply line 130 for supplying water heated or cooled by a heat pump to a space formed by one side and the temperature separation plate, and a second of the contraction heat tank A second discharge line 140 formed on the surface to discharge the water stored by the second side and the temperature separation plate to the heat pump, and formed on the second side surface by the second side and the temperature separation plate The first supply line, the first discharge in accordance with the detection signal received from the second supply line 150 for supplying the heated or cooled water in the facility and the proximity sensor formed in the contraction heat tank in the compartment formed space And a control unit 160 for opening and closing a valve formed in the line, the second supply line, and the second discharge line.

The first discharge line 120 discharges the water stored in the first space defined by the first side and the temperature separation plate to supply to the facility, that is, a facility such as a farm house, The second discharge line 140 discharges the water stored in the second space partitioned by the second side and the temperature separation plate in the direction of the heat pump. The first discharge line and the second discharge line are provided with a first circulating water pump and a second circulating pump to discharge water from the first space or the second space. In addition, the first discharge line and the second discharge line is provided with a first valve and a second valve, it is possible to open and close the first discharge line and the second discharge line. Here, the first and second circulation pumps and the first and second valves are driven by the controller 160.

The first supply line 130 serves to introduce the water heated or cooled by the heat pump into the first space partitioned by the first side and the temperature separation plate, the second supply line 150 is installed The water used in the to perform the function of flowing into the second space partitioned by the second side and the temperature separation plate. The first supply line and the second supply line are provided with a third valve and a fourth valve to open and close the first supply line and the second supply line. Here, the third and fourth valves are driven by the controller 160.

The controller 160 performs a function of driving the first and second supply lines, the first and second discharge lines, and the first to fourth valves as described above. And a detection signal received from the proximity sensor formed on the second side. That is, the present invention fills the water in the first space (high temperature portion) and the second space (low temperature portion) with the same highest water level at room temperature at the initial stage of the heat pump operation, and the circulation pump is operated when the heat pump is operated by heating / cooling. At the same time, two valves are opened to allow the water heated by the heat pump to be stored in the shrinkage heat tank. When the inside of the facility changes below the set temperature (heating) or above the set temperature (cooling), the combined cooling and heating circulation pump is connected to the shrinkage heat tank. At the same time, two automatic valves are opened to heat / cool the facility, and the circulating water is stored in the contraction heat tank again. At this time, the control unit detects the movement amount (stroke length) of the temperature separation plate of the contraction heat bath by the proximity sensor to control the stop / operation of the heat pump, and the stroke control setting should be variable in a unit of at least 0.5 cm.

The contraction heat tank 110 includes a tank 111 for storing cold water and hot water, a temperature separation plate 112 reciprocating in a first side direction and a second side direction of the tank, and a first side surface and a second side surface of the tank. Induction part 113 for guiding the temperature separation plate in the first side or the second side direction in the state supported by, the first proximity sensor 114 mounted on the first side of the tank to detect the approach of the temperature separation plate 114 And a second proximity sensor 115 mounted on the second side of the tank to sense the approach of the temperature separation plate.

The tank 111 is a housing that forms a space in which water is stored. That is, the present invention as described above is to store the water heated or cooled by the heat pump, in order to store the cold and hot water by installing a heat insulating material of a certain thickness, such as urethane on the iron plate or the entire concrete outer wall to store the temperature of the heat storage water Tanks (heat storage tank exterior and insulation) are formed to remain constant. In other words, the material of the tank should be free of deformation at high temperatures (70 ° C.), and those resistant to corrosion resistance should be used. In addition, the tanks should be insulated within a temperature change of the regenerated water within 0.1 ° C / hr and free of leaks. In addition, the tank should have a self-strain within 1mm due to temperature and load.

The temperature separating plate 112 is formed by overlapping a heat insulating material such as urethane on an iron plate or plastic so as to mechanically separate high and low temperature water in the tank, and elasticity such as rubber around the temperature separating plate to maintain airtightness with the surface of the tank. Packing material 116 is provided. That is, the temperature separation plate is manufactured by using a heat insulating material such as urethane on the iron plate or plastic so as to form a high temperature and a low temperature part in the tank, and keeps airtight by rubber packing on both ends and upper and lower ends in contact with the inner surface of the tank. The material of the temperature separation plate (hot / low temperature separation) should have thermal insulation of about 0.04W / m-k thermal conductivity, and the movement stroke of the temperature separation plate (hot-low temperature movement) should be possible up to 90% of the total stroke. The direction / wall surface of the temperature separation plate will allow a tolerance of less than 3mm during construction. When the pump is running, only the temperature separator is moved without convection of water along the temperature separator. The change in the water level of the high temperature and low temperature part due to the movement of the temperature separation plate should be within 3%.

The induction part 113 is to support the temperature separation plate so that the temperature separation plate can move by the pressure difference between the hot water and the low temperature water stored in the first space and the second space, as shown in FIG. 1. Similarly, the first and second supports 113a and 113b are supported by both sides of the tank, and the first and second supports are in contact with the temperature separation plate. Linear (LM) bearings 113c and 113d are provided to move along the first and second supports in a state of minimum frictional resistance.

The first proximity sensor 114 and the second proximity sensor 115 are formed on the first side and the second side, and as described above, the first and second supply lines, the first and second discharge lines, and the first It performs a function of generating an electrical signal for starting or stopping the first to fourth valves, the first and second circulation pump, the heat pump and the like. In other words, the proximity sensor performs a function of controlling the movement of the temperature separation plate.

The contraction heat system for a heat pump according to the present invention as described above has a structure such that the storage is separated into a low temperature side and a high temperature side by installing a temperature separation plate (movable partition) to maintain a constant COP, and has the following characteristics: have.

First, the present invention can function as two contraction heat baths in one contraction heat bath. That is, the present invention is to separate the internal space of one shrinkage heat tank with a temperature separation plate, and to store hot water and cold water separately, and one shrinkage heat bath performs the role of two shrinkage heat baths (high / low temperature).

Second, the present invention is characterized by mechanically separating the high / low temperature of the regenerated water by self-movement of the temperature separation plate, and maintaining the temperature for a long time. That is, the present invention is to allow the temperature separation plate to move itself by the pressure difference between the hot water and the cold water stored in the first space and the second space of the shrinkage heat bath, it is easy to separate the high temperature / low temperature.

Third, the present invention requires only four valves or less, so the structure is simple. That is, this invention has the characteristics that the air-conditioning combined use water supply valve is used.

Fourth, the present invention can be a temperature / displacement complex control.

Fifth, the present invention is characterized in that by using the low-temperature water of the shrinkage heat bath as the heat exchange water during heating, the efficiency of the heating COP is maintained in a high state (previously: the initial COP is higher and lower).

Referring to the operation method of the temperature separation type shrinkage heat bath according to the present invention as described above are as follows.

First, water is filled with a uniform level in a heat storage tank separated by high and low temperatures.

In the first process, when the heat pump is operated, the heat pump and the circulation pump are started so that the low-temperature hot water in the second space (the right space of the temperature separation plate in FIG. 2) moves the second discharge line 140. After discharged through heat exchange in the heat pump, the first supply line 130 is filled with high (low) hot water of the first space (left space of the temperature separation plate in Figure 2). When the water level of the first space is increased through the above process, the temperature separation plate is moved in the second space direction by the pressure difference. On the other hand, when the temperature separation plate approaches the second proximity sensor 115 and a detection signal is transmitted from the second proximity sensor, the control unit stops driving the heat pump and shuts off the valves of the first supply line and the second discharge line. Let's do it.

Thereafter, in a second process, the controller opens the valves of the first discharge line 120 and the second supply line 150. When the valve is opened as described above, hot water stored in the first space is transmitted to the facility (house) through the first discharge line, and water in the facility is introduced into the second space through the second supply line. At this time, as the water level of the second supply line is increased, the temperature separation plate is moved in the first space direction again by the pressure difference. On the other hand, when supplying and discharging the water as described above, as shown in Figure 2, the difference in the water level of the water stored in the first space and the second space. That is, in the case of FIG. 2, water is currently introduced into the second space and water is discharged from the first space. As the water flows into the second space, the water level of the second space is A by the water level of the first space. It is formed high, so that the pressure of the second space is higher than that of the first space. Thus, the temperature separation plate is moved in the direction of the first space from the second space. As a result, the first space is narrowed and the second space is widened.

Then, when the temperature separation plate 112 moves to the first space and is adjacent to the first proximity sensor 114, the control unit again blocks the first discharge line, opens the valve of the first supply line, and vice versa. By opening the second discharge line and shutting off the second supply line, the first process as described above is repeated, and at this time, the pressure separation plate is reverted because the pressure difference between the first space and the second space is reversed. It is moved from the first space to the second space direction.

Figure 3 is a perspective view of one embodiment of a heat sink system for a heat pump according to a second embodiment of the present invention.

The present invention is to separate the internal space of one shrinkage heat tank using a temperature separation plate as described above, while allowing the temperature separation plate to move without the drive of power by the hydraulic pressure difference between the two spaces, using this principle It may be produced in the form as shown in FIG.

That is, as illustrated in FIG. 3, the contraction heat tank 110 applied to the contraction heat system 200 for a heat pump according to the second embodiment of the present invention has a cylindrical shape and a guide part 113. ) Is formed in the vertical direction, the structure, the driving principle and the driving method are the same as the first embodiment except that the temperature separation plate is rotated and moved along the induction part 113 formed in the vertical direction, Detailed description is omitted.

Figure 4 is a graph showing the results of simulating the performance of the heat pump shrinkage heat system according to the present invention, it can be seen that the COP is maintained at a higher state than the conventional heat pump shrinkage heat system.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1 is a perspective view of an embodiment of a heat sink system for a heat pump according to a first embodiment of the present invention.

Figure 2 is a configuration diagram of one embodiment of a heat sink system for a heat pump according to a first embodiment of the present invention.

Figure 3 is a perspective view of one embodiment of a heat sink system for a heat pump according to a second embodiment of the present invention.

Figure 4 is a graph showing the results of simulating the performance of the heat sink system for heat pump according to the present invention.

<Description of the symbols for the main parts of the drawings>

110: contraction heat bath 120: first discharge line

130: first supply line 140: second discharge line

150: second supply line 160: control unit

Claims (8)

Hot water and cold water stored in the tank is separated by a temperature separation plate, the temperature separation plate is a shrinkage heat tank that is formed to be movable in the tank according to the inflow of hot water and cold water; A first discharge line formed on a first side of the contraction heat tank and configured to discharge water stored by the first side and the temperature separation plate to a facility; A first supply line formed on the first side to supply water heated or cooled by a heat pump to a space defined by the first side and the temperature separation plate; A second discharge line formed on the second side of the contraction heat tank and discharging the water stored by the second side and the temperature separation plate to the hip pump; A second supply line formed on the second side and spaced by the second side and the temperature separation plate, for supplying water heated or cooled in a facility; And And a control unit for opening and closing a valve formed in the first supply line, the first discharge line, the second supply line, and the second discharge line according to a detection signal received from the proximity sensor formed in the contraction heat tank. Shrinkage heat system for heat pump. The method of claim 1, The first discharge line performs a function of discharging the water stored in the first space defined by the first side and the temperature separation plate to supply the facility, and the second discharge line is the second discharge line. And discharges the water stored in the second space defined by the side and the temperature separation plate in the direction of the heat pump, The first supply line performs a function of introducing water heated or cooled by a heat pump into the first space, and the second supply line has a function of introducing water used in the facility into the second space. Shrinkage bath system for heat pump, characterized in that performing. The method of claim 1, The control unit, Drives opening and closing of the first to fourth valves formed in the first and second supply lines, the first and second discharge line in accordance with the detection signals received from the two proximity sensors provided in the contraction heat tank. Shrinkage bath system for heat pump, characterized in that. The method of claim 1, The contraction heat bath, Said tank for storing cold water and hot water; A temperature separation plate reciprocating in the first side direction and the second side direction; An induction part for guiding the temperature separation plate in the direction of the first side or the second side in a state supported by the first side and the second side; A first proximity sensor mounted on the first side to sense an approach of the temperature separating plate; And And a second proximity sensor mounted on the second side to sense an approach of the temperature separation plate. The method of claim 4, wherein The temperature separation plate, Shrinkage heat system for a heat pump, characterized in that the elastic packing material is provided around the temperature separation plate to maintain the surface and airtight inside the tank. The method of claim 4, wherein The induction part, A first support being supported by both sides of the tank; And And a second support supported by both sides of the tank in a state parallel to the first support. The method of claim 6, The induction part, And a linear bearing configured to allow the temperature separation plate to move while reducing friction with the first support or the second support. The method of claim 4, wherein The tank is cylindrical, The induction part is composed of a first support projecting in the vertical direction from the bottom of the tank, And the temperature separation plate rotates along the first support.

Images