JP2004156806A - Warm/cold thermal system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To distribute heat from a plurality of outdoor units to a plurality of heat utilizing apparatus. <P>SOLUTION: This warm/cold thermal system is provided with first and second outdoor units 11, 12 equipped with compressors 13a, 13b to supply a high temperature refrigerant compressed by the compressors 13a, 13b; a plurality of heat utilizing apparatus such as a floor heating panel 5, an air conditioner 6 and a water heater 7 utilizing the heat of circulating water and utilization water which flow therein; and a heat exchanging part provided with first to third heat exchangers 21-23 exchanging heat between the refrigerant from the first and second outdoor units 11, 12 and the circulating water and utilization water which are circulated, and provided to be able to change a method of connection to the first and second outdoor units 11, 12 and a method of connection to the floor heating panel 5, air conditioner 6 and the water heater 7. Heat distribution is performed by changing the method of connection so that the quantity of heat demanded by each heat utilizing apparatus can be supplied. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heating / cooling heat system that exchanges heat between refrigerant from a plurality of outdoor units and circulating water circulating through a plurality of heat utilization devices, and that can distribute and supply the amount of heat required by each heat utilization device. About.
[0002]
[Prior art]
Today, refrigeration circuits are used as heat sources for heating, water heaters, and air conditioners. Such a refrigeration circuit has a compressor that compresses a refrigerant, a condenser that condenses the refrigerant, an expansion valve that expands the refrigerant, and an evaporator that exchanges heat with the refrigerant, and when the heat is used, the refrigerant radiates heat in the condenser. When heat is used and cold heat is used, the heat absorbed when the refrigerant evaporates in the evaporator is used.
[0003]
When using heat, it is called a so-called heat pump, and its use has been studied and put to practical use because of its high refrigeration efficiency.
[0004]
There are many floor heating panels, air conditioners, water heaters, and the like as heat utilization devices utilizing such hot and cold heat. A heat pump has been proposed (see Patent Document 1).
[0005]
[Patent Document 1]
JP-A-6-88628
[Problems to be solved by the invention]
However, in the conventional multi-heat pump, since the refrigerant is directly supplied to the heat utilization device, for example, the water heater and the floor heating panel cannot be simultaneously used as the heat utilization device, and a plurality of heat utilization devices are connected. In such a case, a compressor with a large capacity must be used, which causes a cost increase. In addition, since the heat utilization devices are not always operated at the same time, sometimes the capacity becomes excessive. was there.
[0007]
Therefore, an object of the present invention is to provide a heating and cooling system that solves the above-mentioned problems.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, the invention according to claim 1 uses an outdoor unit that includes a compressor and supplies a high-temperature refrigerant compressed by the compressor, and uses heat of the circulating water by flowing the circulating water. Heat exchange between the plurality of heat utilization devices, the refrigerant from the outdoor unit, and the circulating water from the plurality of heat utilization devices, and at that time, the amount of heat required by each heat utilization device is supplied to the heat utilization device. And a heat exchange distributor that performs heat distribution.
[0009]
According to a second aspect of the present invention, there is provided a heat exchanger including a plurality of outdoor units, and a heat exchanger including a first primary circuit through which a refrigerant flows and a first secondary circuit through which circulating water flows. A plurality of heat exchangers are connected to a primary circuit of each heat exchanger to a plurality of outdoor units in accordance with the amount of heat required by the plurality of heat exchangers. Characterized in that it is connected to
[0010]
According to a third aspect of the present invention, the heat exchange distributor includes a heat exchanger including a first primary circuit in which the refrigerant flows and a second secondary circuit in which the circulating water flows. And heat exchange with circulating water from a plurality of heat utilization devices.
[0011]
According to the invention according to claim 4, the outdoor unit includes an evaporator for evaporating the refrigerant, a condenser for condensing the refrigerant, a first expansion valve for expanding the refrigerant, and a bypass valve for switching a circulation path of the refrigerant, In addition, when the second expansion valve is connected to the primary circuit of one heat exchanger in the heat exchange distributor and a plurality of heat utilization devices require cold heat and hot heat, the heat from the compressor is reduced. A high-temperature refrigerant is supplied to one of the plurality of heat exchangers to heat the circulating water flowing through the heat utilization equipment connected to the heat exchanger, and the second expansion valve is provided for the refrigerant that has exchanged heat with the heat exchanger. And evaporates in the heat exchanger to which the second expansion valve is connected, thereby cooling the circulating water circulating in the secondary circuit of the heat exchanger to give cool heat, and providing the compressor with a bypass valve. It is characterized by returning to.
[0012]
According to a fifth aspect of the present invention, in the heat exchange distributor, when performing heat distribution so that a plurality of heat utilization devices can supply the required amounts of heat, the flow of switching the flow paths of the refrigerant and the circulating water by the solenoid valve is performed. It is characterized by having a road switch.
[0013]
The invention according to claim 6 is characterized in that the refrigerant is a carbon dioxide refrigerant, and the circulating water is water such as city water or brine.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram of a heating and cooling system 1 according to the present invention.
[0015]
The heating / cooling system 1 includes a heat source unit 10 including first and second outdoor units 11 and 12 disposed outside, a heat exchange unit 20 including first to third heat exchangers 21 to 23, a floor heating panel, The main configuration is a heat utilization unit 30 such as an air conditioner and a water heater.
[0016]
Examples of the heat utilization device in the heat utilization unit 30 include a circulation type heat utilization device in which circulating water circulates, such as a floor heating panel, an air conditioner, and a snow melting panel, and a water supply type heat in which circulating water is consumed such as a water heater or a bath. There are devices to use.
[0017]
Further, these heat utilization devices can be classified into high-temperature heat utilization devices and low-temperature heat utilization devices according to their required temperatures. In this case, the high-temperature-type heat utilization device is a device having a required temperature of, for example, 60 ° C. to 90 ° C., which corresponds to a floor heating panel or a water heater, and the low-temperature-type heat utilization device is a device of 30 ° C. to 45 ° C. Is equivalent.
[0018]
Note that the number of outdoor units in the heat source unit 10, the number of heat exchangers in the heat exchange unit 20, and the type and number of heat utilization devices in the heat utilization unit 30 are examples, and do not limit the present invention. However, it is necessary that the number of outdoor units is two or more, the number of heat exchangers is three or more, and the number of heat utilization devices is two or more.
[0019]
In the present embodiment, the floor heating panel 5 and the air conditioner 6 will be described as examples of the circulating heat utilization equipment, and the water heater 7 will be described as an example of the water supply heat utilization equipment.
[0020]
The first outdoor unit 11 is connected to the primary circuit of the first heat exchanger 21, and the second outdoor unit 12 is connected to the primary circuits of the second heat exchanger 22 and the third heat exchanger 23. ing.
[0021]
In the secondary circuit of the first heat exchanger 21 and the second heat exchanger 22, a circulating water tank 31 for supplying circulating water to circulating heat utilization equipment such as the floor heating panel 5 and the air conditioner 6 is provided. The hot water supply tank 32 is connected to the secondary circuit of the third heat exchanger 23.
[0022]
The above is the schematic configuration, and the detailed configuration and operation and effect will be described next.
[0023]
The first and second outdoor units 11 and 12 in the heat source unit 10 include compressors 13a and 13b that compress the refrigerant and supply the heat to the heat exchange unit 20, and expansion valves 14a and 14 that expand the refrigerant that has exchanged heat in the heat exchange unit 20. 14b, evaporators 16a and 16b, which evaporate by exchanging heat with the expanded refrigerant and the outside air blown by the blowers 15a and 15b, have a main configuration.
[0024]
Note that water such as city water or brine can be used as the circulating water, and various refrigerants such as a carbon dioxide refrigerant and an HFC refrigerant can be used as the refrigerant.
[0025]
The first to third heat exchangers 21 to 23 are internally piped to form a unit, and the refrigerant from the first and second outdoor units 11 and 12 circulates through the respective primary circuits. In the next circuit, water used for the water heater 7 and circulating water for the floor heating panel 5 circulate.
[0026]
In addition, the primary circuit and the secondary circuit in the first to third heat exchangers 21 to 23 may have a configuration in which heat is exchanged through fins. The primary circuit and the secondary circuit are immersed in a fluid such as water, brine, or oil. A configuration in which heat is exchanged via the heat exchanger may be used.
[0027]
As described above, the first outdoor unit 11 is connected to the primary circuit of the first heat exchanger 21, and the second outdoor unit 12 is connected to the primary circuits of the second heat exchanger 22 and the third heat exchanger 23. The circulating water tank 31 is connected to the secondary circuit of the first heat exchanger 21 and the second heat exchanger 22, and the water supply tank 32 is connected to the secondary circuit of the third heat exchanger 23. However, such a connection configuration is used for the following reasons.
[0028]
That is, the heat utilization devices such as the floor heating panel 5, the air conditioner 6, and the water heater 7 require different amounts of heat for each model, or use time zones do not match.
[0029]
Needless to say, since the heat source unit 10 may be used at once, it is preferable that the heat source unit 10 side has a heat supply capability capable of coping with this.
[0030]
However, if such a heat supply is to be covered by one outdoor unit, it is necessary to use an outdoor unit having a very large heat supply capacity, which causes a cost increase and a part of a plurality of heat utilization devices. In the case where the operation is stopped, the excess capacity is obtained and the economic efficiency is deteriorated.
[0031]
Therefore, in the present invention, the circulating water tank 31 and the water supply tank 32 are provided so as to cope with a temporarily increased load amount.
[0032]
Further, in the present invention, a plurality of small outdoor units having the same specification are provided without providing an outdoor unit having a large heat supply capacity, and a circulating heat utilization device on the circulating water tank 31 side and a water supply type heat utilization device on the water supply tank 32 side. When an imbalance occurs in the amount of heat required by the device, the heat of some of the outdoor units (the second outdoor unit 12 in FIG. 1) can be distributed to the circulating water tank 31 side.
[0033]
Of course, the present invention is not limited to a configuration that allows a part of the heat of the second outdoor unit 12 to be supplied to the circulating water tank 31, and has a configuration as shown in FIGS. 2 and 3. Is also good.
[0034]
In the configuration shown in FIG. 2, for example, when hot water supply to a bath is considered as the heat utilization device on the water supply tank 32 side, a large amount of hot water is consumed in filling the bath water in a short time. A configuration is shown in which a part of the heat from the one outdoor unit 11 is supplied to the water supply tank 32 side.
[0035]
The configuration shown in FIG. 3 is a configuration having both the configurations shown in FIGS. 1 and 2 so that heat from the first outdoor unit 11 and the second outdoor unit 12 can be distributed according to the load condition. is there.
[0036]
In the configuration shown in FIGS. 1 to 3, the valves connected to the primary and secondary circuits of the first to third heat exchangers 21 to 23 are heat distributors 71a and 71b including electromagnetic valves and the like. The water temperature of the circulating water tank 31 and the water supply tank 32 is detected, and control is performed based on the detected temperatures.
[0037]
Since the heat distributors 71a and 71b are formed by the solenoid valves as described above, the heat distributors 71a and 71b take any one of the valve-opening and valve-closing modes. However, in reality, there is a case where it is desired to distribute the heat quantity more finely. Therefore, in order to cope with such a case, it is preferable to use a flow control valve.
[0038]
Hereinafter, the configuration shown in FIG. 1 will be described as an example. The circulating heat utilization unit 31 includes a floor heating panel 5, a water heater 7, a circulating water tank 31, a water supply tank 32, a three-way valve 33, a high temperature side pump 34, a low temperature side pump 35, an expansion can 36, a hot water side pump 37, and the like. Is the main configuration.
[0039]
The circulating water tank 31 has a primary inflow pipe 41, a secondary outflow pipe 42, a primary outflow pipe 43, a secondary inflow pipe 44, an air vent valve 45, a safety valve 46, a tank drain 47, and the like. It is insulated so that circulating water and the like can be stored in layers. Note that stratification means that there is almost no convection in the tank, and the temperature gradient of the stored circulating water changes smoothly, for example, from the upper part to the lower part of the tank.
[0040]
The primary inflow pipe 41 and the secondary outflow pipe 42 are provided on the upper side of the circulating water tank 31, and the primary outflow pipe 43 and the secondary inflow pipe 44 are provided on the lower side of the circulating water tank 31.
[0041]
The air vent valve 45 and the safety valve 46 are provided to be connected to the secondary outflow pipe 42, and the primary drain pipe 43 and the secondary inflow pipe 44 are provided with a tank drain 47.
[0042]
The air vent valve 45 allows the air in the circulating water tank 31 and the piping to escape when the circulating water is started to be stored in the circulating water tank 31, such as when the system is used for the first time or when the use is resumed after maintenance. It is a valve that makes an escape.
[0043]
The safety valve 46 is opened when a predetermined pressure is reached so that the pressure in the circulating water tank 31 and the piping communicating with the circulating water tank 31 becomes abnormal pressure due to any cause and damage to equipment and the like does not occur. To prevent the pressure from exceeding this pressure.
[0044]
The tank drain 47 drains water from the circulating water tank 31 and the piping during maintenance or the like.
[0045]
Then, the circulating water whose temperature has been increased by heat exchange in the heat exchange unit 20 flows into the upper part of the circulating water tank 31 from the primary inflow pipe 41 and is stored in the circulating water tank 31.
[0046]
The circulating water stored in the circulating water tank 31 flows out of the secondary outflow pipe 42 according to a flow path indicated by a solid arrow shown in FIG. It is supplied to the floor heating panel 5 via the side pump 34 and returns to the lower part of the circulating water tank 31 from the secondary inflow pipe 44.
[0047]
The pipe connecting the floor heating panel 5 and the secondary inflow pipe 44 and the three-way valve 33 are connected by a bypass pipe 48. The bypass pipe 48 and the three-way valve 33 form a flow path (hereinafter, referred to as flow path B) indicated by a dotted arrow.
[0048]
The three-way valve 33 includes a circulating water supplied from the circulating water tank 31 to the floor heating panel 5 via the flow path A, and a circulating water supplied from the bypass pipe 48 to the floor heating panel 5 via the flow path B. To set the mixing ratio, so that the temperature of the circulating water supplied to the floor heating panel 5 by the signal from the temperature detector 49 becomes the set temperature set in the equipment. Next, the amount of circulating water from the circulating water tank 31 and the amount of circulating water from the bypass pipe 48 are adjusted.
[0049]
That is, when the high-temperature side pump 34 is driven, the amount of water according to the amount of water supplied by the high-temperature side pump 34 is supplied to the floor heating panel 5.
[0050]
At this time, since the amount of circulating water from the circulating water tank 31 is adjusted by the three-way valve 33, the circulating water returned from the floor heating panel 5 via the bypass pipe 48 is supplied to the shortage.
[0051]
Thereby, in the three-way valve 33, the high-temperature circulating water from the circulating water tank 31 is mixed with the low-temperature circulating water from the bypass pipe 48, whereby the temperature is adjusted and supplied to the floor heating panel 5.
[0052]
A part of the circulating water returned from the floor heating panel 5 circulates in the flow path A via the bypass pipe 48 as described above, but the rest returns to the circulating water tank 31 via the secondary inflow pipe 44. .
[0053]
The circulating water returned in this manner is supplied to the air conditioner 6 via the primary outflow pipe 43 by the low-temperature side pump 35 and returns to the heat exchange unit 20.
[0054]
By the way, the circulating water stored in the circulating water tank 31 is designed not to exceed 100 ° C. However, since the circulating water is pumped by the low-temperature pump 35 and the high-temperature pump 34, the circulating water is The pressure may be lower than the atmospheric pressure, and in such a case, it is feared that it will boil even at 90 ° C.
[0055]
Further, if the temperature of the circulating water rises even if it does not boil, the volume of the circulating water slightly changes, but since the pipe through which the circulating water flows is a closed pipe, the volume fluctuation cannot be absorbed.
[0056]
In such a case, if the operating pressure is lowered so that the safety valve 46 is immediately opened to make it atmospheric pressure or a volume change can be absorbed, the function as the safety valve 46 is lost and the safety valve 46 is opened. Then, when the steady state is reached, there is a problem that the inside of the pipe and the like becomes negative pressure.
[0057]
Therefore, in the present invention, the expansion can 36 is provided so that some boiling and volume fluctuation can be absorbed.
[0058]
In the above description, one floor heating panel 5 is described, but a plurality of floor heating panels may be used. That is, it is possible to provide floor heating panels 5 in a plurality of rooms and supply circulating water from one circulating water tank 31.
[0059]
However, in this case, since the temperature of the circulating water supplied via the high-temperature side pump 34 is the set temperature (constant temperature) as described above, it is necessary to perform temperature adjustment for each floor heating panel 5. Can not.
[0060]
In order to adjust the temperature for each floor heating panel 5, a thermal valve 53 is provided for each floor heating panel 5 as shown in FIG. Thus, the amount of circulating water flowing into the floor heating panel 5 may be adjusted.
[0061]
The circulating water returning from the primary outlet pipe 43 to the heat exchange unit 20 passes through the air conditioner 6, which has an air conditioner heat exchanger 50, a blower 51, a duct 52, and the like, and operates the blower 51. By doing so, outside air is taken into the duct 52 via the air-conditioning heat exchanger 50, and is blown to each room via the duct 52.
[0062]
When the circulating water from the primary outflow pipe 43 is supplied to the air-conditioning heat exchanger 50, the outside air is heated and becomes warm air to heat each room.
[0063]
Although the temperature of the circulating water required by the air conditioner 6 varies depending on the amount of air blown, the temperature of the circulating water returned to the circulating water tank 31 via the secondary inflow pipe 44 is often lower.
[0064]
As described above, since the circulating water tank 31 forms a stratified structure, if the opening positions of the secondary inflow pipe 44 and the primary outflow pipe 43 are at the same height, the secondary inflow pipe 44 and the circulating water tank 31 Is supplied to the air conditioner 6 via the primary outlet pipe 43 as it is, and circulating water having a temperature higher than the temperature required by the air conditioner 6 is supplied.
[0065]
Therefore, in the present invention, the opening position of the secondary inflow pipe 44 is set to a position higher than the opening position of the primary outflow pipe 43, and the circulating water having a temperature lower than that of the circulating water returning from at least the secondary inflow pipe 44 is obtained. The air is supplied to the air conditioner 6.
[0066]
A water heater 7 as an example of a water supply type heat utilization device has a water supply tank 32, a water supply pump, and the like as main components.
[0067]
In the water supply tank 32, a primary inflow pipe 63, a secondary outflow pipe (hot water supply pipe) 64, a primary outflow pipe 66, a secondary inflow pipe 65 (supply pipe for city water, etc.), an air vent pipe 61, a safety valve 62, a tank drain 67 and the like are provided to insulate the outside air and store hot water in a stratified state.
[0068]
The operations of the primary inflow pipe 63, the secondary outflow pipe 64, the primary outflow pipe 66, the secondary inflow pipe 65, the air vent pipe 61, the safety valve 62, the tank drain 67 and the like are performed by the primary inflow pipe 41 in the circulating water tank 31. , The secondary outflow pipe 42, the primary outflow pipe 43, the secondary inflow pipe 44, the air vent valve 45, the safety valve 46, the tank drain 47, etc., so that detailed description is omitted.
[0069]
The primary inflow pipe 63 is connected to the third heat exchanger 23, and the utilization water heated by the third heat exchanger 23 flows into the water supply tank 32 from above the water supply tank 32 and is stored therein.
[0070]
A secondary outflow pipe 64 is provided above the water supply tank 32, and hot water can be supplied through the secondary outflow pipe 64.
[0071]
Further, a primary outlet pipe 66 is provided below the water supply tank 32, and the water used from the primary outlet pipe 66 is pumped by a water supply pump and supplied to the third heat exchanger 23. ing.
[0072]
Now, in such a configuration, when the amount of heat required on the circulating water tank 31 side can be covered by the refrigerant from the first outdoor unit, the heat distributor 71a is closed. Thereby, the refrigerant from the second outdoor unit circulates only to the third heat exchanger.
[0073]
On the other hand, when the refrigerant from the first outdoor unit cannot supply the required amount of heat on the circulating water tank 31 side, the heat distributor 71a is opened. At this time, the heat distributor 71b is appropriately closed depending on the situation such as the water supply tank 32 being full.
[0074]
Thereby, the refrigerant from the second outdoor unit is also supplied to the second heat exchanger, so that heat can be distributed to the circulating water tank 31 side.
[0075]
By opening and closing the heat distributors 72a and 72b in FIG. 2 and the heat distributors 73a to 73h in FIG. 3, heat distribution can be performed in the same manner.
[0076]
As described above, since the heat source unit 10 is composed of a plurality of small outdoor units and the heat exchange unit 20 is composed of a plurality of heat exchangers, the heat of each outdoor unit can be distributed according to the state of the load. As a result, heat utilization efficiency is improved.
[0077]
Next, a second embodiment of the present invention will be described with reference to the drawings. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
[0078]
The heat exchanger in the heat exchange unit 20 described so far is a two-circuit heat exchanger constituted by one primary circuit and one secondary circuit.
[0079]
On the other hand, in the present embodiment, as shown in FIG. 4, a three-circuit heat exchanger 24 composed of one primary circuit and two secondary circuits is used.
[0080]
By using the heat exchange unit 20 constituted by such a three-circuit heat exchanger 24, one medium-sized outdoor unit is installed, and the flow path is controlled by the heat distributors 74a and 74b to thereby provide a plurality of heat utilization devices. Can be distributed to the heat source.
[0081]
Next, a third embodiment of the present invention will be described with reference to the drawings. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted as appropriate.
[0082]
In each of the embodiments described above, a case has been described in which the heat utilization device utilizes only warm heat. For this reason, the outdoor unit worked as a heat pump.
[0083]
However, the air conditioner 6 sometimes needs cooling, and it is in principle possible to flow cold water through the floor heating panel 5 and use it as floor cooling.
[0084]
Therefore, in the present invention, as shown in FIG. 5, it is possible to cope with a case where one of the heat utilization devices utilizes warm heat and one utilizes cold heat.
[0085]
In the configuration shown in FIG. 5, the first outdoor unit 11 supplies only the heat through the first heat exchanger 21, and the second outdoor unit 12 supplies the heat through the third heat exchanger 23. Although the case where cold heat is supplied through the second heat exchanger 22 is shown, both the hot and cold heat may be supplied from the first outdoor unit 11 as well.
[0086]
In the configuration shown in FIG. 5, a pipe connecting the compressor 13b and the evaporator 16b in the second outdoor unit 12 and a pipe connecting the third heat exchanger 23 and the expansion valve 14b are connected by a bypass valve 26. are doing.
[0087]
In addition, the pipes on the refrigerant inflow side of the second heat exchanger 22 and the third heat exchanger 23 are connected to each other by a pipe 29a, and the pipe on the refrigerant inflow side of the second heat exchanger 22 and the pipe of the third heat exchanger 23 are connected. The pipe on the refrigerant outflow side is connected by a pipe 29b, and the pipe on the refrigerant outflow side in the second heat exchanger 22 and the pipe on the refrigerant outflow side in the third heat exchanger 23 are connected by a pipe 29c.
[0088]
The check valve 28 is provided in the pipe 29b, the expansion valve 27 is provided in the pipe 29c, and the heat distributors 75a to 75c are further provided.
[0089]
Thereby, when supplying heat from the third heat exchanger 23 and not supplying heat from the second heat exchanger 22, when supplying heat from the third heat exchanger 23 and the second heat exchanger 22, When supplying heat from the third heat exchanger 23 and supplying cool heat from the second heat exchanger 22, the refrigerant is circulated as follows.
[0090]
First, when the heat is supplied from the third heat exchanger 23 and the heat is not supplied from the second heat exchanger 22, the heat distributor 75a is closed, the heat distributor 75b is closed, and the heat distribution is performed. The valve 75c is opened, the bypass valve 26 is closed, and the expansion valve 14b is throttled appropriately. Thereby, the refrigerant from the second outdoor unit 12 is supplied only to the third heat exchanger 23, and returns to the compressor 13b via the expansion valve 14b and the evaporator 16b.
[0091]
When supplying heat from the third heat exchanger 23 and the second heat exchanger 22, all the heat distributors 75a to 75c are opened, the expansion valve 14b is appropriately throttled, the expansion valve 27 is fully opened, and the bypass valve is opened. Close 26.
[0092]
Thereby, the refrigerant from the second outdoor unit 12 is supplied to the second heat exchanger 22 and the third heat exchanger 23, and returns to the compressor 13b via the expansion valve 14b and the evaporator 16b.
[0093]
In addition, when supplying heat from the third heat exchanger 23 and supplying cool heat from the second heat exchanger 22, the heat distributor 75a is closed, the heat distributor 75b is opened, and the heat distributor 75c is closed. At the same time, the expansion valve 14b is closed, the expansion valve 27 is appropriately throttled, and the bypass valve 26 is fully opened.
[0094]
Thereby, the refrigerant from the second outdoor unit 12 is first supplied to the third heat exchanger 23, where it exchanges heat with the used water and condenses. Since the heat distributor 75c is closed and the heat distributor 75b is open, the condensed refrigerant is supplied to the expansion valve 27 and expanded, and then supplied to the second heat exchanger 22. .
[0095]
Then, the circulating water is evaporated by exchanging heat with the circulating water in the second heat exchanger 22, and the latent heat of evaporation at this time is taken from the circulating water to cool the circulating water.
[0096]
The refrigerant that has exchanged heat with the circulating water returns to the second outdoor unit 12 via the check valve 28 and the heat distributor 75c. Since the expansion valve 14b of the second outdoor unit 12 is closed and the bypass valve 26 is open, the flow returns to the compressor 13b.
[0097]
As described above, both hot and cold heat can be supplied, and convenience is improved.
[0098]
【The invention's effect】
As described above, since the plurality of outdoor units and the plurality of heat utilization devices are connected by the heat exchange unit including the plurality of heat exchangers, heat distribution according to the amount of heat required by each heat utilization device becomes possible. As a result, cost can be reduced and economy can be improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a heating and cooling system applied to the description of a first embodiment of the present invention.
FIG. 2 is a configuration diagram of a heating and cooling system replacing FIG. 1;
FIG. 3 is a configuration diagram of a heating / cooling heat system replacing FIG. 1;
FIG. 4 is a configuration diagram of a heating and cooling system applied to the description of a second embodiment of the present invention.
FIG. 5 is a configuration diagram of a thermal cooling system applied to the description of a third embodiment of the present invention.
[Explanation of symbols]
5 Floor heating panel 6 Air conditioner 7 Water heater 10 Heat source unit 11 First outdoor unit 12 Second outdoor unit 20 Heat exchange unit 21 First heat exchanger 22 Second heat exchanger 23 Third heat exchanger 24 Heat exchanger 26 Bypass valve 27 Expansion valve 28 Check valve 30 Heat utilization unit 31 Circulating heat utilization unit 31 Circulating water tank 32 Water supply tank 34 High temperature side pump 35 Low temperature side pump 36 Expansion can 48 Bypass pipes 71a, 71b Heat distributor Heat distributor 72a , 72b Heat distributors 73a-73h Heat distributors 75a-75c Heat distributors

Claims (6)

An outdoor unit that includes a compressor and supplies a high-temperature refrigerant compressed by the compressor,
A plurality of heat utilization devices in which the circulating water flows and uses the heat of the circulating water,
The refrigerant from the outdoor unit and the circulating water from the plurality of heat utilization devices are subjected to heat exchange, and in this case, heat distribution required by each heat utilization device is distributed such that heat is supplied to the heat utilization devices. And a heat exchange distributor. A plurality of the outdoor units are provided, and the heat exchange distributor includes a plurality of heat exchangers each including a primary circuit in which the refrigerant flows and a secondary circuit in which the circulating water flows,
The primary circuit of each heat exchanger is connected to the plurality of outdoor units according to the amount of heat required by the plurality of heat utilization devices, and the secondary circuit of each heat exchanger is connected to the plurality of heat utilization devices. The heating and cooling system according to claim 1, wherein the heating and cooling system is connected. The heat exchange distributor includes a heat exchanger including a primary circuit in which the refrigerant flows and a secondary circuit in which the circulating water flows, and a refrigerant from the outdoor unit and a plurality of the refrigerants. 2. The heating / cooling heat system according to claim 1, wherein heat is exchanged with circulating water from the heat utilization equipment. The outdoor unit includes an evaporator that evaporates the refrigerant, a condenser that condenses the refrigerant, a first expansion valve that expands the refrigerant, and a bypass valve that switches a circulation path of the refrigerant, and the heat exchange distributor A second expansion valve is connected to a primary circuit of the heat exchanger, and when a plurality of heat utilization devices require cold and warm heat, a high-temperature refrigerant from the compressor is provided. Is supplied to one of the plurality of heat exchangers and heats the circulating water flowing through the heat utilization device connected to the heat exchanger, and the refrigerant that has exchanged heat in the heat exchanger is passed through the second expansion valve. By depressurizing and evaporating in the heat exchanger to which the second expansion valve is connected, the circulating water circulating in the secondary circuit of the heat exchanger is cooled to give cold heat, and is passed through the bypass valve. 2. The apparatus according to claim 1, wherein said compressor is returned to said compressor. Optimum 3 temperature thermal system according to any one. In the heat exchange distributor, when performing heat distribution so that a plurality of heat utilization devices can supply the required amount of heat respectively, a flow path switching device that switches a flow path of the refrigerant and the circulating water by an electromagnetic valve is provided. The heating and cooling system according to any one of claims 1 to 4, wherein: The heating / cooling system according to any one of claims 1 to 5, wherein the refrigerant is a carbon dioxide refrigerant, and the circulating water is water such as city water or brine.

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