JP4779052B1 - Air-conditioning water heater - Google Patents

Abstract

【Task】
It integrates hot water generation and cooling to provide a highly efficient cooling hot water supply system.
[Solution]
The cooling water heater 260 of the present invention has a winter mode in which the maximum amount of hot water is stored, an intermediate period mode in which less hot water is stored than in the winter mode, and a cooling mode in which a large amount of exhaust heat is stored. The interval shifts by date, and the interval mode and the cooling mode shift based on the amount of exhaust heat. The cooling water heater 260 is operated by a refrigerant circuit 91 that absorbs heat from outside air and generates hot water, and is operated by a strong cooling instruction, and is operated by a refrigerant circuit 95 that generates hot water and a weak cooling instruction, and generates medium-temperature water. The refrigerant circuit 94 and the refrigerant circuit 92A and 96 that absorb the heat of the medium temperature water generated by the operation of the refrigerant circuit 94 or the heating device 140 and generate hot water are provided, so that the thermal efficiency of cooling and hot water generation is extremely high, There is no reduction in the thermal efficiency of hot water generation by medium temperature water.
[Selection] FIG.

Description

The present invention relates to a cooling water heater that integrates a cooling device that cools a building, a hot water generation device that generates hot water, and a water storage device that stores water.

In order to reduce energy consumption and operation costs, many technologies that use exhaust heat from cooling, solar heat, and the like for hot water generation and heating have been disclosed.
The heat pump air-conditioning / heating water heater described in Patent Document 1 has a refrigeration cycle, a high-temperature tank, and a low-temperature tank, stores hot water in the high-temperature tank during midnight power operation, and exhausts heat from the cooling during daytime cooling / storage operation. The low temperature hot water is stored in the low temperature tank, the hot water in the high temperature tank and the low temperature tank is mixed, and the hot water is supplied.
The hot water supply device described in Patent Document 2 takes out the warm water in the hot water storage tank, cools it with an auxiliary evaporator, and returns it to the lower part of the hot water storage tank to generate water at the bottom of the hot water storage tank. Keep at low temperature. Since the refrigerant circuit generates hot water from low-temperature water at the bottom of the hot water storage tank, it is possible to prevent the COP of the refrigerant circuit from decreasing.
In the hot water supply apparatus described in Patent Literature 3, hot water from the vicinity of the upper outlet of the hot water storage tank flows to the heating heat exchanger via the primary-side hot water circulation conduit and returns to the lower return port. Before returning to the lower return port, there is a primary heating pump that circulates hot water. On the other hand, the heating heat exchanger has a secondary heating pump and a heating terminal connected to the secondary hot water circulation pipe, and can be used as floor heating through the heating terminal.

JP 2008-241203 A JP 2007-10207 A JP 2006-343008 A

The heat pump air-conditioning / water heater described in Patent Document 1 uses the exhaust heat of cooling for hot water generation, but because there are a high-temperature tank and a low-temperature tank, piping, installation, and temperature adjustment of hot water are complicated and expensive. . Furthermore, the amount of exhaust heat that can be stored in the low-temperature tank is small. Next, the reason will be described. The amount of heat that can be stored in the low-temperature tank after all the latent heat storage material has been melted by the exhaust heat of the cooling is the amount of heat that the water that flows to the low-temperature tank cools when hot water is subsequently used. The amount of heat is substantially equal to the amount of water that flows through the low-temperature tank, the temperature difference between the solidification temperature of the latent heat storage material and the temperature of tap water, and the specific heat and density of water. On the other hand, the amount of heat required to generate the amount of hot water used is the amount of heat obtained by multiplying the amount of hot water used, the temperature difference between hot water and tap water, the specific heat of water and the density. The amount of hot water (the amount of hot water that flows and is used in the hot water supply pipe 43 in FIG. 1 of Patent Document 1) is larger than the amount of water that flows in the low-temperature tank. Much larger than the temperature difference. Therefore, the amount of heat exhausted by the cooling that can be stored in the low temperature tank is much less than the amount of heat required to generate the amount of hot water for hot water supply. For example, assuming that the temperature of tap water is 20 degrees, the solidification temperature is 35 degrees, the temperature of hot water in a high-temperature tank is 65 degrees, and the temperature of hot water supply is 45 degrees, the exhaust heat amount of the cooling system used generates the amount of hot water for hot water supply. This is approximately 40% of the amount of heat required. That is, most of the hot water is generated by absorbing the heat of the outside air, and only a part of the exhaust heat from the cooling is used for the generation of hot water.
Further, in order to make maximum use of the latent heat of the latent heat storage material enclosed in a plurality of capsules accommodated in the low temperature tank, it is necessary to flow water substantially uniformly throughout the low temperature tank, but no means for that is described. .

In the hot water supply apparatus described in Patent Document 2, since the refrigerant circuit generates hot water from the low-temperature water at the bottom of the hot water storage tank, the COP (hot water generation capacity / power consumption of the refrigerant circuit) of the refrigerant circuit is prevented from decreasing. However, since the operation of the cooling circuit pump consumes energy, the thermal efficiency of hot water generation (hot water generation capacity / (power consumption of the refrigerant circuit + power consumption of the cooling circuit pump)) is reduced.

In the hot water supply apparatus described in Patent Document 3, the water deprived of heat by the heating heat exchanger returns to the hot water storage tank from the return port, and is mixed with cold water or high temperature water in the hot water storage tank. Mixing increases the medium temperature water and reduces the amount of hot water available. For example, if the temperature of water that has been deprived of heat by the heat exchanger for heating and returned to the return port is a temperature that can be used for heating, and the water near the return port in the hot water tank is cold water, it returns to the return port. Water is mixed with cold water, and its temperature falls below the temperature that can be used for heating and cannot be used for heating. That is, mixing the return water with the cold water in the hot water tank reduces the amount of hot water available for heating.

The object of the present invention has been made in view of the above-described problems, and generates hot water during strong cooling, generates warm water with exhaust heat during weak cooling, and stores warm water when If the hot water is generated by absorbing the heat of the medium-temperature water, and the intermediate-temperature water is not stored in the water storage tank, the heat efficiency of the cooling and the generation efficiency of the hot water are improved by absorbing the heat from the outside and generating the hot water. Both are extremely high.

The medium temperature is a temperature at which the thermal efficiency of hot water generation is reduced when hot water is generated from water at that temperature (for example, 35 degrees or more and less than the temperature of hot water). is there. Water below the medium temperature is called cold water.

The cooling hot water supply apparatus of the present invention absorbs the heat of the water below the predetermined position in the water storage tank, the first refrigerant circuit that generates heat by absorbing heat by the heat transfer means, and the heat absorption means, A second refrigerant circuit that generates hot water, a fourth refrigerant circuit that weakly cools the building and releases the exhaust heat of the cooling to the water in the water storage tank by means of heat dissipation, and an exhaust heat of the cooling that strongly cools the building And a fifth refrigerant circuit for generating hot water and a hot water generating water circulation path for sending the generated hot water to the upper part of the water storage tank.
The cooling water heater of the present invention operates the fifth refrigerant circuit during strong cooling to generate hot water by exhaust heat from the cooling, and operates the fourth refrigerant circuit during weak cooling to release the exhaust heat from the cooling to the water in the water storage tank. However, when there is medium temperature water generated by the exhaust heat of weak cooling in the water tank, the second refrigerant circuit is operated to absorb the heat of the medium temperature water to generate hot water and change the medium temperature water to cold water. The production of hot water and the thermal efficiency of cooling are extremely high.

The cooling hot water supply apparatus of the present invention includes a refrigerant circuit that generates hot water by absorbing the exhaust heat of the cooling stored in the water storage tank, thereby cooling the building and generating hot water with much higher thermal efficiency than the prior art. To do.

The cooling hot-water supply apparatus 210 which is the 1st reference example of a cooling-hot-water supply apparatus is shown. The cooling hot water supply apparatus 210A which is the 2nd reference example of a cooling hot water supply apparatus is shown. The cooling hot water supply apparatus 210B which is the 3rd reference example of a cooling hot water supply apparatus is shown. The cooling hot water supply apparatus 210C which is the 4th reference example of a cooling hot water supply apparatus is shown. 10 shows a cooling water heater 210D, which is a fifth reference example of the cooling water heater. The cooling hot water supply apparatus 210E which is the 6th reference example of a cooling hot water supply apparatus is shown. The cooling hot water supply apparatus 210F which is the 7th reference example of a cooling hot water supply apparatus is shown. The cooling hot water supply apparatus 210G which is the 8th reference example of a cooling hot water supply apparatus is shown. The cooling hot water supply apparatus 210H which is the 9th reference example of a cooling hot water supply apparatus is shown. The cooling hot-water supply apparatus 220 which is a 10th reference example of a cooling-hot-water supply apparatus is shown. The cooling hot-water supply apparatus 230 which is 1st embodiment of the cooling-hot-water supply apparatus of this invention is shown. The cooling hot water supply apparatus 230A which is 2nd embodiment of the cooling hot water supply apparatus of this invention is shown. The cooling hot water supply apparatus 230B which is 3rd embodiment of the cooling hot water supply apparatus of this invention is shown. The cooling hot water supply apparatus 230C which is 4th embodiment of the cooling hot water supply apparatus of this invention is shown. The cooling hot water supply apparatus 240 which is 5th embodiment of the cooling hot water supply apparatus of this invention is shown. The cooling hot water supply apparatus 250 which is the 11th reference example of the cooling hot water supply apparatus of this invention is shown. The hot water supply apparatus 310 which is a 1st reference example of a hot water supply apparatus is shown. The hot water supply apparatus 320 which is the 2nd reference example of a hot water supply apparatus is shown. A hot water supply device 320A, which is a third reference example of the hot water supply device, is shown. The hot-water supply apparatus 330 which is the 4th reference example of a hot-water supply apparatus is shown. The hot-water supply apparatus 330A which is the 5th reference example of a hot-water supply apparatus is shown. The hot water supply apparatus 340 which is the 6th reference example of a hot water supply apparatus is shown. A hot water supply device 340A which is a seventh reference example of the hot water supply device is shown. The cooling hot water supply apparatus 260 which is 6th embodiment of the cooling hot water supply apparatus of this invention is shown. A plan view of the spiral tube 22 and a perspective view of the coiled tube 23 are shown. A perspective view of one embodiment of a disperser 24 is shown. A sectional view of the water storage tank 11 and a perspective view of the partition member 17 are shown. A sectional view of water storage tank 11 and a perspective view of channel branch pipe 18 are shown. Sectional drawing of the water storage tank 11 and the perspective view of the partition member 17A are shown. Sectional drawing of the water storage tank 11 and the perspective view of 18 A of flow-path branch pipes are shown.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a cooling water heater 210 as a first reference example of the cooling water heater. The cooling hot water supply apparatus 210 includes a water storage device 110, a hot water generation device 130, and a cooling device 150.
The water storage device 110 includes a water storage tank 11 filled with water. The water storage tank 11 is connected to a hot water supply port 12 arranged at the upper part, a water supply port 13 arranged at the lower part, and heat exchangers 37 and 54 in the water storage tank 11. It has a hole that penetrates the pipe through which the refrigerant flows. The water tank 11 shown in FIG. 1 schematically shows a vertical cross section of the water tank 11, and the water tank 11 has a shape composed of a cylinder, an upper lid, and a lower lid.
The hot water generator 130 includes a water circulation path 38 that connects the water supply port 13 and the hot water supply port 12, a pump 36 that circulates water through the water circulation path 38, refrigerant circuits 91 and 92, and temperature detectors 39 and 39A. The refrigerant circuit 91 includes a compressor 31 that compresses refrigerant, a heat exchanger 34 that performs heat exchange between water flowing in the water flow path and refrigerant flowing in the refrigerant flow path, a valve 35 that controls the flow rate of the refrigerant, and expands the refrigerant. And a heat exchanger 33 for exchanging heat between the refrigerant and the outside air. A refrigerant is circulated through them to form a refrigeration cycle. The refrigerant circuit 92 is disposed in the water storage tank 11 below the position of the compressor 31, the heat exchanger 34, the valve 35 </ b> A that controls the flow rate of the refrigerant, the expander 32 </ b> A that expands the refrigerant, and the temperature detector 39. And a heat exchanger 37 that performs heat exchange with the refrigerant, and a refrigerant is circulated through them to form a refrigeration cycle. The water flow path of the heat exchanger 34 is disposed in the middle of the water circulation path 38. The refrigerant circulating in the refrigerant circuits 91 and 92 is preferably carbon dioxide.

The cooling device 150 includes a refrigerant circuit 93 and a temperature detector 59. The refrigerant circuit 93 is disposed below the heat exchanger 37, the compressor 51 that compresses another refrigerant, the heat exchanger 54 that exchanges heat between the other refrigerant and water, and the expander that expands the other refrigerant. 52 and a heat exchanger 53 that performs heat exchange between the other refrigerant and the air in the building, and the other refrigerant is circulated through them to form a refrigeration cycle. The other refrigerant is preferably an HFC refrigerant. Hereinafter, other refrigerants may be referred to as refrigerants.
The heat exchanger 37 and the heat exchanger 54 may be a spiral tube 22 as shown in FIG. 25A or a coiled tube 23 as shown in FIG.
Hereinafter, the minimum temperature of hot water or hot water is referred to as a first temperature (for example, 60 degrees), and the temperature of water supplied to the water supply port 13 is referred to as a third temperature (for example, 20 degrees). The thermal efficiency of the refrigerant circuit 93 rapidly decreases when the temperature of the water in contact with the heat exchanger 54 that cools the high-pressure refrigerant exceeds a specific temperature. The specific temperature is called a fourth temperature (for example, 35 degrees). The lowest intermediate temperature is called a fifth temperature (for example, 35 degrees), and a predetermined temperature that is not less than the third temperature and less than the fifth temperature is called a second temperature (for example, 30 degrees). In other words, hot water, medium-temperature water, and cold water are hot water that is at or above the first temperature, medium-temperature water is water that is below the first temperature and at or above the fifth temperature, and cold water is water that is below the fifth temperature.

The temperature detector 39 is disposed at a position where the amount of hot water calculated based on the amount of hot water used in one day is stored in the upper water storage tank 11. When the refrigerant circuit 91 and the pump 36 are operated, the hot water generated in the heat exchanger 34 flows into the water storage tank 11 from the hot water supply port 12, and the temperature stratification in the water storage tank 11 is lowered by the volume of the hot water that has flowed in. When hot water is generated from the top of the water storage tank 11 to the position of the temperature detector 39, a temperature stratification is formed immediately below the temperature detector 39. The heat exchanger 37 is disposed at the position of the layer having a temperature lower than the second temperature of the temperature stratification. However, it is assumed that hot water is generated after all the water in the water storage tank 11 is filled with water of the third temperature.
The temperature detector 39A detects the temperature of water in contact with the heat exchanger 37 (if the refrigerant does not flow through the heat exchanger 37, the temperature of the water is approximately equal to the temperature of the heat exchanger 37, and the refrigerant flows into the heat exchanger 37. When it is flowing, it is arranged at a position to detect the temperature of water on the return path (upward path) of natural convection generated by the water cooled by the heat exchanger 37. For example, when the heat exchanger 37 is the spiral tube 22, the temperature detector 39 </ b> A is disposed slightly below the spiral tube 22 near the center of the water storage tank 11.
The heat exchanger 54 is disposed near the bottom of the water storage tank 11. The temperature detector 59 detects the temperature of the water in contact with the heat exchanger 54 (if no refrigerant flows through the heat exchanger 54, the temperature of the water is approximately equal to the temperature of the heat exchanger 54, and the refrigerant flows into the heat exchanger 54). When it is flowing, it is arranged at a position to detect the temperature of water on the return path (downward path) of natural convection generated by the water heated by the heat exchanger 54. For example, when the heat exchanger 54 is the spiral tube 22, the temperature detector 59 is disposed near the center of the water storage tank 11 and slightly above the spiral tube 22.

In addition, you may substitute the heat exchanger 33 which transmits the heat of external air to a refrigerant | coolant with the apparatus which transmits heat, such as water, soil, and gas, to a refrigerant | coolant. Further, the heat exchanger 33 exchanges heat between the heat medium flowing in the heat medium flow path and the refrigerant flowing in the refrigerant flow path as in the cooling water heater 210H which is the ninth reference example of the cooling water heater shown in FIG. The heat exchanger 33A to be performed, the heat exchanger 33B to perform heat exchange between the outside air and the heat medium, the heat medium circulation path 38B and the heat medium for circulating the heat medium between the heat exchanger 33A and the heat exchanger 33B You may substitute by the pump 36B which circulates a thermal medium to the circulation path 38B. That is, the heat exchanger 33 may be replaced with a device that transfers the heat of the outside air to the refrigerant through the heat medium. Furthermore, the heat exchanger 33B may be replaced with a device that transfers heat such as water, soil, and gas to the heat medium.
Further, the heat exchanger 53 includes a heat exchanger 53B that performs heat exchange between the heat medium and the air in the building, as in the cooling water heater 210H, and a heat medium that flows through the heat medium flow path and a refrigerant that flows through the refrigerant flow path. A heat exchanger 53A for performing heat exchange with the heat exchanger, a heat medium circulation path 57 for circulating the heat medium between the heat exchanger 53B and the heat exchanger 53A, and a heat medium circulating in the heat medium circulation path 57. It may be replaced with the pump 56A. That is, the heat exchanger 53 may be replaced with a device that transfers the heat of air in the building to the refrigerant through the heat medium.

The position where the amount of hot water calculated based on the average amount of hot water used in a day is stored in the upper water storage tank 11 (the position where the temperature detector 39 is disposed) corresponds to the predetermined position of the present invention.
Some expanders, such as an electronic expansion valve, have a function of adjusting the opening degree by an external signal, and others do not have a function of adjusting the opening degree by an external signal.

Hereinafter, the cooling and hot water supply apparatus and the hot water supply apparatus have a control unit (not shown) including a CPU, ROM, RAM, a program, an I / O interface, etc. Suppose that the device is properly controlled or operated.
Next, the operation of the cooling water heater 210 will be described. When the refrigerant circuit is operated, the compressor is operated at an appropriate rotational speed, and if the heat exchanger for exchanging heat between the outside air and the refrigerant has a fan, the refrigerant circuit is operated by operating the fan at an appropriate rotational speed. Is to form a refrigeration cycle. It is assumed that the refrigerant circuit is operated with the refrigerant flow rate and pressure adjusted appropriately.
(1) When the expanders 32 and 32A do not have a function of adjusting the opening degree by an external signal, a predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and temperature detection When the detected temperature of the container 39A is lower than the second temperature, the control unit opens the valve 35 and closes the valve 35A, and operates the refrigerant circuit 91 and the pump 36. When the refrigerant circuit 91 and the pump 36 are operated, the heat exchanger 33 absorbs heat from the outside air, and the heat exchanger 34 transmits the heat to the water in the water circulation path 38 to generate hot water. The hot water is sent to the upper part of the water storage tank 11 by the pump 36 and stored in the upper part of the water storage tank 11, the amount of hot water in the water storage tank 11 increases, and the amount of cold water decreases by the increase of the hot water. A temperature stratification is formed between the hot water in the upper part of the water storage tank 11 and the cold water in the lower part, and the temperature stratification descends as the hot water increases. When the temperature detected by the temperature detector 39 reaches the first temperature, the operation of the refrigerant circuit 91 and the pump 36 is stopped. At this time, the hot water from the top of the water storage tank 11 to the temperature detector 39 is hot water.
The predetermined hot water generation conditions include the time at which midnight power is applied, the amount of hot water less than a predetermined amount, and the like.

When a predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is equal to or higher than the second temperature, the control unit opens the valve 35A, The refrigerant circuit 92 and the pump 36 are operated. When the refrigerant circuit 92 and the pump 36 are operated, heat is absorbed by the heat exchanger 37 from the water in the vicinity of the heat exchanger 37 in the water tank 11, hot water is generated by the heat exchanger 34, and the hot water is stored in the water tank. 11 is sent to the top. The temperature stratification in the water storage tank 11 descends as hot water is generated. Heat is absorbed by the heat exchanger 37, the cooled water descends, and natural convection occurs. That is, the heat exchanger 37 absorbs heat from the water near and below the heat exchanger 37.
When the detected temperature of the temperature detector 39 is lower than the first temperature and the detected temperature of the temperature detector 39A reaches the third temperature, the refrigerant circuit 92 is stopped and the refrigerant circuit 91 is operated (the valve 35 is opened). The valve 35A is closed). When the temperature detected by the temperature detector 39 reaches the first temperature, the operation of the refrigerant circuit 91 or 92 and the pump 36 is stopped.
The valves 35 and 35A may be replaced with a three-way valve.

When the refrigerant circuit 92 is operated, only the heat exchanger 37 absorbs heat in the water storage tank 11 to generate hot water, so that the temperature of water near the heat exchanger 37 is lowered. This is because the water in the water storage tank 11 is lowered by the amount of hot water generated, but the heat exchanger 37 absorbs the amount of heat necessary for hot water generation from the water. When the temperature of the water near the heat exchanger 37 falls below the third temperature, the refrigerant circuit 92 is stopped and the refrigerant circuit 91 is operated. When the refrigerant circuit 91 is operated, hot water is generated by the heat of the outside air, and the water in the water storage tank 11 is lowered. Since the temperature of the water in the water storage tank 11 is higher as it goes upward, the temperature of the temperature detector 39A increases as hot water is generated. When the temperature detected by the temperature detector 39A becomes equal to or higher than the second temperature, the refrigerant circuit 91 is stopped and the refrigerant circuit 92 is operated. That is, the refrigerant circuits 91 and 92 are alternately operated, and the water temperature in the lower part of the water storage tank 11 is maintained near or below the second temperature. Therefore, the cooling hot water supply apparatus 210 can perform cooling with high thermal efficiency and generate hot water with high thermal efficiency.
This operation (operation in which the ratio of refrigerant flowing through one refrigerant circuit is 100% and the ratio of refrigerant flowing through the other refrigerant circuit is 0%) is referred to as on / off operation. On-off operation causes a transient phenomenon every time the operation is switched, and the transient phenomenon reduces the rate of hot water generation and thermal efficiency.

(2) When the expanders 32 and 32A have a function of adjusting the opening degree by an external signal, the valve 35 and the valve 35A are always open. When the predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is lower than the second temperature, the control unit closes the expander 32A, and the refrigerant circuit 91 and the pump 36 are operated to generate hot water.
When a predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is equal to or higher than the second temperature, the control unit includes the refrigerant circuits 91 and 92, the pump 36 is operated, and the ratio of the flow rate of the refrigerant flowing through the refrigerant circuits 91 and 92 is calculated based on the temperature difference between the temperature detected by the temperature detector 39A and the second temperature, and the expanders 32 and 32A are adjusted to have the ratio. Adjust the opening. For example, when the ratio of the refrigerant circulated through the refrigerant circuit 92 is such that the temperature detected by the temperature detector 39A is equal to or higher than the second temperature and lower than the first temperature, the temperature between the second temperature and the temperature detected by the temperature detector 39A. In proportion to the difference, the opening degrees of the expanders 32 and 32A are adjusted so that the temperature detected by the temperature detector 39A is 100% when the temperature is the first temperature. The total flow rate of the refrigerant flowing through the expanders 32 and 32A is the flow rate of the refrigerant compressed by the compressor 31, and the flow rate is adjusted by the control unit based on the thermal load, the degree of superheat, the refrigerant temperature, pressure, and the like. To do.
When the refrigerant circuits 91 and 92 and the pump 36 are operated, a part of the amount of heat necessary for producing hot water is absorbed by the heat exchanger 37, and the remaining heat is absorbed from the outside air by the heat exchanger 33 to produce hot water. Then, the temperature in the vicinity of the heat exchanger 37 decreases to near the second temperature. This operation is called simultaneous operation. Simultaneous operation can avoid a transient phenomenon, and can keep the water temperature of the lower part in the water tank 11 in the vicinity of the second temperature or lower. Therefore, the cooling hot water supply apparatus 210 can perform cooling with high thermal efficiency and generate hot water with high thermal efficiency.

In the simultaneous operation, when the detected temperature of the temperature detector 39A is equal to or higher than the second temperature and lower than the first temperature, the ratio of the refrigerant flowing through the refrigerant circuit 92 is proportional to the temperature difference between the second temperature and the detected temperature of the temperature detector 39A. However, the ratio of the refrigerant flowing through the refrigerant circuit 92 may be adjusted so as to increase stepwise as the temperature difference between the second temperature and the temperature detected by the temperature detector 39A increases. When electronic expanders are used as the expanders 32 and 32A, the opening degrees of the expanders 32 and 32A are controlled stepwise, but if the number of steps is increased, the problem of transient phenomenon hardly occurs.
The refrigerant flowing out from the heat exchanger 37 and the refrigerant flowing out from the heat exchanger 33 have different states (dryness and superheat degree). When the flow rate of the refrigerant is controlled by the degree of superheat, it is necessary to detect the temperature of the refrigerant after changing the refrigerant in different states to the refrigerant in the same state. Further, it is preferable to put the gas-phase refrigerant into the compressor 31 after changing the refrigerant in different states to the refrigerant in the same state.

When there is an instruction for cooling operation and the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 93 is operated. When the refrigerant circuit 93 is operated, the heat of the air in the building is absorbed by the heat exchanger 53, and the heat is released to the water in the water storage tank 11 by the heat exchanger 54. The water heated by the heat exchanger 54 rises and natural convection occurs. That is, the heat exchanger 54 heats the water above the heat exchanger 54. When there is sufficient water below the fourth temperature above the heat exchanger 54, the temperature detected by the temperature detector 59 does not rise to the fourth temperature.
When the temperature detected by the temperature detector 59 rises to the fourth temperature or higher, a predetermined first heat treatment is performed. In the first waste heat treatment, a drain valve (not shown) connected to the hot water inlet 12 is opened to drain the hot water in the water storage tank 11 (see the drain valve 73A in FIG. 10), or between the temperature detector 39 and the temperature detector 59. The water tank 11 is provided with a drain port (not shown), and a drain valve (not shown) connected to the drain port is opened to discharge the water in the water tank 11 (see drainage device 170 in FIG. 16). Regardless of which drain valve is opened, water is supplied from the water supply port 13, the temperature detected by the temperature detector 59 falls below the fourth temperature, and the refrigerant circuit 93 is operated with high thermal efficiency. That is, the exhaust heat of the cooling is not released to the outside air, but is discharged outside the water storage tank 11 by the drainage. When a latent heat storage body having a latent heat storage material having a melting temperature higher than the third temperature and lower than the fourth temperature is disposed between the heat exchangers 37 and 54 (see FIG. 5), the exhaust heat of the cooling is the latent heat storage It is stored in the body and the amount of drainage is reduced or not drained.

When hot water is not used for a long time, the hot water may be radiated through the heat insulating material of the water storage tank 11 to generate medium-temperature water. When predetermined hot water generation conditions are satisfied, hot water is generated, and the medium-temperature water is lowered to the position of the temperature detector 39A, the refrigerant circuits 91 and 92 are turned on / off or simultaneously operated to generate hot water with high thermal efficiency. .
In the cooling water heater 210, when the refrigerant circuit 93 is operated and the hot water generator 130 is operated at midnight, the medium-temperature water generated by the operation of the refrigerant circuit 93 becomes cold water by the operation of the hot water generator 130 at midnight. Therefore, the next day cooling device 150 is operated with high thermal efficiency. Therefore, the cooling hot water supply apparatus 210 can perform cooling with high thermal efficiency and generate hot water with high thermal efficiency.

FIG. 2 shows a cooling hot water supply apparatus 210A which is a second reference example of the cooling hot water supply apparatus. The cooling hot water supply apparatus 210A includes a water storage device 110, a hot water generation device 130A, and a cooling device 150. The water storage device 110 and the cooling device 150 have already been described. The hot water generator 130A includes refrigerant circuits 91 and 92A, a water circulation path 38, and a pump 36. It is assumed that the expanders 32B and 32C have a function of adjusting the opening degree by an external signal.
The refrigerant circuit 91 includes a compressor 31, a heat exchanger 34, an expander 32 </ b> B, and a heat exchanger 33. The refrigerant is circulated through them to form a refrigeration cycle, and is equivalent to the refrigerant circuit 91 of the hot water generator 130. The refrigerant circuit 92A includes a compressor 31, a heat exchanger 34, an expander 32C, and heat exchangers 37 and 33, and circulates refrigerant through them to form a refrigeration cycle. When the refrigerant circuit 92A is operated, the refrigerant circuit 92A absorbs heat by the heat exchangers 37 and 33 and releases heat by the heat exchanger 34.
The expander that has the function of adjusting the opening degree by an external signal is replaced with an expander that does not have the function of adjusting the opening degree by an external signal and a valve that has a function of adjusting the flow rate by an external signal. Is possible.

When a predetermined hot water generation condition is satisfied, the detected temperature of the temperature detector 39 is lower than the first temperature, and the detected temperature of the temperature detector 39A is lower than the second temperature, the control unit closes the expander 32C, and the refrigerant circuit 91 And the pump 36 is operated. When the predetermined hot water generation condition is satisfied, the detected temperature of the temperature detector 39 is lower than the first temperature, and the detected temperature of the temperature detector 39A is equal to or higher than the second temperature, the controller is configured to use the refrigerant circuits 91 and 92A and the pump 36. The flow rate of the refrigerant flowing through the refrigerant circuits 91 and 92A is calculated based on the difference between the temperature detected by the temperature detector 39A and the second temperature, and the expanders 32B and 32C are opened so as to be the ratio. Adjust the degree. That is, the refrigerant circuits 91 and 92A are simultaneously operated, and the water temperature in the lower part of the water storage tank 11 is maintained near or below the second temperature. Therefore, the cooling hot water supply apparatus 210A can perform cooling with high thermal efficiency and generate hot water with high thermal efficiency.
In addition, since the refrigerant | coolant which flowed out from the heat exchanger 37 and the expander 32B from the heat exchanger 37 is mixed in the heat exchanger 33, it will be in the same state in the exit of the heat exchanger 33, and can detect a superheat degree easily. The refrigerant circuits 91 and 92A can be turned on and off.

FIG. 3 shows a cooling water heater 210B as a third reference example of the cooling water heater. The cooling hot water supply apparatus 210B includes a water storage device 110, a hot water generation device 130B, and a cooling device 150. The water storage device 110 and the cooling device 150 have already been described. The hot water generator 130B includes refrigerant circuits 91 and 92B, a water circulation path 38, and a pump 36.
The refrigerant circuit 91 includes a compressor 31, a heat exchanger 34, an expander 32 </ b> B, and a heat exchanger 33. The refrigerant is circulated through them to form a refrigeration cycle, and is equivalent to the refrigerant circuit 91 of the hot water generator 130. The refrigerant circuit 92B includes a compressor 31, a heat exchanger 34, an expander 32C, a heat exchanger 37, an expander 32B, and a heat exchanger 33, and circulates refrigerant through them to form a refrigeration cycle. When the refrigerant circuit 92B is operated, the refrigerant circuit 92B absorbs heat by the heat exchangers 33 and 37 and releases heat by the heat exchanger 34, similarly to the refrigerant circuit 92A. In the refrigerant circuit 92B, since the refrigerant is decompressed (expanded) by the expanders 32B and 32C, the pressure in the heat exchanger 37 is intermediate between the pressures of the heat exchangers 34 and 33, and the temperature of the refrigerant in the heat exchanger 37 is The temperature of the refrigerant in the heat exchangers 34 and 33 is intermediate. And the pressure in the heat exchanger 37 and the temperature of a refrigerant | coolant can be adjusted with the opening degree of the expanders 32B and 32C.

When predetermined hot water generation conditions are satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is lower than the second temperature, the control unit opens the valve 35 and opens the expander 32C. Then, the refrigerant circuit 91 and the pump 36 are operated.
When a predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is equal to or higher than the second temperature, the control unit closes the valve 35, and the refrigerant circuit 92B And the pump 36 is operated, and the opening degrees of the expanders 32B and 32C are adjusted so that the temperature of the refrigerant at the outlet of the expander 32C becomes a temperature near the second temperature. When the refrigerant circuit 92B and the pump 36 are operated, the heat exchanger 37 absorbs heat from the water below the heat exchanger 37, the heat exchanger 33 absorbs heat from the outside air, and the heat exchanger 34 Is generated. When the temperature detected by the temperature detector 39A becomes less than the third temperature, the operation of the refrigerant circuit 92B is stopped and the refrigerant circuit 91 is operated. That is, the refrigerant circuit 91 and the refrigerant circuit 92B are turned on / off, and the water temperature in the lower part of the water storage tank 11 is maintained near or below the second temperature. Therefore, the cooling hot water supply apparatus 210B can perform cooling with high thermal efficiency and generate hot water with high thermal efficiency.

FIG. 4 shows a cooling hot water supply apparatus 210C which is a fourth reference example of the cooling hot water supply apparatus. The cooling hot water supply apparatus 210C includes a water storage device 110A, a hot water generation device 130C, and a cooling device 150A.
The water storage device 110 </ b> A includes a water storage tank 11 </ b> A filled with water, and the water storage tank 11 </ b> A has a hot water supply port 12, a water supply port 13, and an intermediate port 14 disposed below the temperature detector 39. The position of the intermediate port 14 is arranged at the position of the layer having a temperature lower than the second temperature of the temperature stratification generated when hot water is generated from the top to the position of the temperature detector 39. That is, the intermediate port 14 is arranged at a horizontal position similar to the position where the heat exchanger 37 is arranged. The temperature detector 39A is disposed slightly below the intermediate port 14, and the temperature detector 59 is disposed near the bottom of the water tank 11A.
The hot water generator 130C includes a heat exchanger 37A of the hot water generator 130A, a heat exchanger 37A for exchanging heat between water flowing in the water flow path and a refrigerant flowing in the refrigerant flow path, and an intermediate port via the heat exchanger 37A. 14 and a water circulation path 38A connecting the water supply port 13 and a pump 36A arranged in the middle of the water circulation path 38A.
The refrigerant circuit 92C includes a compressor 31, a heat exchanger 34, an expander 32C, and heat exchangers 37A and 33. A refrigerant is circulated through the refrigerant circuit 92C to form a refrigeration cycle, and an intermediate port is provided via the heat exchanger 37A. Heat is absorbed from the water taken from 14, and the water is returned to the water supply port 13. That is, the refrigerant circuit 92C absorbs the heat of the water below the temperature detector 39 in the water storage tank 11 as in the refrigerant circuit 92A, and generates hot water by the heat exchanger 34.
The hot water generator 130C operates in the same manner as the hot water generator 130A. However, the pump 36A is operated when the refrigerant circuit 92C is operated.

The cooling device 150A includes a heat exchanger 54A for performing heat exchange between the water flowing in the water flow path and the refrigerant flowing in the refrigerant flow path, and the intermediate port 14 via the heat exchanger 54A. A water circulation path 58 connecting the water supply ports 13 and a pump 56 disposed in the middle of the water circulation path 58 are replaced.
The refrigerant circuit 93A includes a compressor 51, a heat exchanger 54A, an expander 52, and a heat exchanger 53. A refrigerant is circulated through these circuits to form a refrigeration cycle. Heat is released to the taken-in water, and the water is returned to the intermediate port 14. That is, the refrigerant circuit 93 </ b> A releases heat to water below the temperature detector 39 in the water storage tank 11, similarly to the refrigerant circuit 93.
The cooling device 150A operates in the same manner as the cooling device 150. However, the pump 56 is operated when the refrigerant circuit 93A is operated.

FIG. 5 shows a cooling water heater 210D which is a fifth reference example of the cooling water heater. The cooling hot water supply apparatus 210D has a configuration in which a latent heat storage body 21 is added to the cooling hot water supply apparatus 210A, and the latent heat storage body 21 is disposed between the heat exchanger 37 and the heat exchanger 54 in the water storage tank 11. A latent heat storage material having a melting temperature higher than the third temperature, lower than the fourth temperature, and lower than the fifth temperature is used as the latent heat storage material of the latent heat storage body 21. For example, sodium sulfate decahydrate (melting temperature 32.4 degrees) or paraffin (C18H38, melting temperature 28.2 degrees) is used as the latent heat storage material. When a latent heat storage material having a low melting temperature is used, the temperature of the high-pressure refrigerant in the refrigerant circuit 93 can be lowered, and the thermal efficiency of the cooling device 150 is increased. Furthermore, since the latent heat storage body 21 can store a large amount of heat, the water storage tank 11 can be reduced in size.
A predetermined temperature that is equal to or higher than the third temperature and lower than the melting temperature of the latent heat storage body 21 is referred to as a sixth temperature.

When a predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is lower than the sixth temperature, the control unit closes the expander 32C, and the refrigerant circuit 91 And the pump 36 is operated.
When a predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is equal to or higher than the sixth temperature, the control unit performs the refrigerant circuits 91 and 92A and the pump 36. Drive
The ratio of the flow rate of the refrigerant flowing through the refrigerant circuits 91 and 92A is calculated based on the difference between the detected temperature of the temperature detector 39A and the sixth temperature, and the opening degrees of the expanders 32B and 32C are adjusted so as to be the ratio. . For example, when the ratio of the refrigerant circulated through the refrigerant circuit 92A is such that the temperature detected by the temperature detector 39A is equal to or higher than the sixth temperature and lower than the melting temperature, the temperature of the sixth temperature and the temperature detected by the temperature detector 39A. In proportion to the difference, when the detected temperature of the temperature detector 39A is equal to or higher than the melting temperature, the opening degree of the expanders 32B and 32C is adjusted to be 100%. When a sufficient amount of hot water is generated by the simultaneous operation of the refrigerant circuits 91 and 92A, the water temperature in the lower part of the water storage tank 11 is lowered to around or below the sixth temperature, and the latent heat storage body 21 is solidified.
The cooling device 150 releases the exhaust heat of cooling to the water in the water storage device 11 by the heat exchanger 54 and melts the latent heat storage body 21. That is, the latent heat storage body 21 is melted by the exhaust heat of the cooling and solidified when hot water is generated. When the latent heat of the latent heat storage body 21 is larger than the amount of heat necessary for producing hot water and the amount of heat necessary for producing hot water is larger than the amount of heat of exhaust heat from the cooling, all the exhaust heat from the cooling can be used for producing hot water. In addition, when the heat quantity of the exhaust heat is large and the temperature detected by the temperature detector 59A is equal to or higher than the fourth temperature, the first exhaust heat treatment is performed.
Accordingly, the cooling and hot water supply apparatus 210D can perform cooling with high thermal efficiency and generate hot water with high thermal efficiency, and can be made smaller than the cooling hot water supply apparatus 210A.

FIG. 6 shows a cooling water heater 210E as a sixth reference example of the cooling water heater. The cooling water heater 210E includes a water storage device 110, a hot water generator 130D, and a cooling device 150. The water storage device 110 and the cooling device 150 have already been described.
The hot water generator 130D includes refrigerant circuits 91A and 92D, a water circulation path 38, and a pump 36. The refrigerant circuit 91A sucks the refrigerant compressed to the intermediate pressure by the low-stage side rotary compression element into the high-stage side rotary compression element via the intermediate coupling circuit 75C, and compresses the refrigerant to a high pressure by the high-stage side rotary compression element. 31A, a heat exchanger 34, an expander 32D for reducing the pressure to a saturation pressure or less, a gas-liquid separator 75A for gas-liquid separation of the refrigerant in a wet gas state, and the liquid separated by the gas-liquid separator 75A An expander 32B for depressurizing the refrigerant and a heat exchanger 33 are provided, and the refrigerant is circulated through them to form a refrigeration cycle. The gaseous refrigerant separated by the gas-liquid separator 75A is injected into the compressor 31A via the injection circuit 75B. When the refrigerant circuit 91 </ b> A is operated, the refrigerant circuit 91 </ b> A absorbs heat by the heat exchanger 33 and releases heat by the heat exchanger 34 as in the refrigerant circuit 91. The refrigerant circuit 91A operates in the supercritical region, and the refrigerant is carbon dioxide.

The refrigerant circuit 92D includes a compressor 31A, a heat exchanger 34, an expander 32D, a gas-liquid separator 75A, an expander 32C that decompresses the liquid refrigerant separated by the gas-liquid separator 75A, and a heat exchanger. 37 and 33 are provided, and a refrigerant is circulated through them to form a refrigeration cycle. The gaseous refrigerant separated by the gas-liquid separator 75A is injected into the compressor 31A via the injection circuit 75B. When the refrigerant circuit 92D is operated, the refrigerant circuit 92D absorbs heat by the heat exchangers 33 and 37 and releases heat by the heat exchanger 34, similarly to the refrigerant circuit 92A.
Control of the ratio of the refrigerant circuits 91A and 92D to start and stop and the flow rate of the refrigerant is performed similarly to the control of the ratio of the refrigerant circuits 91 and 92A to start and stop and the ratio of the refrigerant flow rate.
This two-stage compression and two-stage expansion system (see Japanese Patent Application Laid-Open No. 2007-178042) improves thermal efficiency and provides stable operation.

FIG. 7 shows a cooling water heater 210F which is a seventh reference example of the cooling water heater. The cooling hot water supply apparatus 210F includes a water storage device 110, a hot water generation device 130E, and a cooling device 150. The water storage device 110 and the cooling device 150 have already been described.
The hot water generator 130E includes refrigerant circuits 91B and 92E, a water circulation path 38, and a pump 36. The refrigerant circuit 91B includes a compressor 31, a heat exchanger 34, a high-pressure refrigerant flow path of a heat exchanger 76A that performs heat exchange between the low-pressure refrigerant flowing in the low-pressure refrigerant flow path and the high-pressure refrigerant flowing in the high-pressure refrigerant flow path. An expander 32B, a heat exchanger 33, an accumulator 76B that separates the gas phase and the liquid phase, and a low-pressure refrigerant flow path of the heat exchanger 76A are provided, and a refrigerant is circulated through them to form a refrigeration cycle. When the refrigerant circuit 91B is operated, similarly to the refrigerant circuit 91, the refrigerant circuit 91B absorbs heat by the heat exchanger 33 and generates hot water by the heat exchanger 34.
The refrigerant circuit 92E includes the compressor 31, the heat exchanger 34, the high pressure refrigerant flow path of the heat exchanger 76A, the expander 32C, the heat exchangers 37 and 33, the accumulator 76B, and the low pressure refrigerant of the heat exchanger 76A. A flow path is provided, and a refrigerant is circulated through them to form a refrigeration cycle. When the refrigerant circuit 92E is operated, the refrigerant circuit 92E absorbs heat by the heat exchangers 33 and 37 and releases heat by the heat exchanger 34, similarly to the refrigerant circuit 92A.
Control of the ratio of the refrigerant circuits 91B and 92E to start and stop and the flow rate of the refrigerant is performed similarly to the control of the ratio of the refrigerant circuits 91 and 92A to start and stop and the ratio of the refrigerant flow rate.
The heat exchanger 76A improves the refrigeration capacity of the refrigeration cycle (see JP 2001-108308 A).

FIG. 8 shows a cooling hot water supply apparatus 210G as an eighth reference example of the cooling hot water supply apparatus. The cooling hot water supply apparatus 210G includes a water storage device 110, a hot water generation device 130F, and a cooling device 150. The water storage device 110 and the cooling device 150 have already been described.
The hot water generator 130F includes a refrigerant circuit 91C, a refrigerant circuit 92F, a water circulation path 38, and a pump 36. The ejector 77B decompresses and expands the refrigerant flowing out of the heat exchanger 34 and sucks the vapor phase refrigerant evaporated in the heat exchanger 33, and converts the expansion energy into pressure energy to increase the suction pressure of the compressor 31. The gas-liquid separator 77A is a device that separates the refrigerant into a gas phase refrigerant and a liquid phase refrigerant and stores the refrigerant.
The refrigerant circuit 91 </ b> C includes a compressor 31, a heat exchanger 34, an ejector 77 </ b> B, a gas-liquid separator 77 </ b> A, an expander 32 </ b> B, and a heat exchanger 33. In the refrigerant circuit 91C, the high-temperature refrigerant compressed by the compressor 31 is cooled by the heat exchanger 34 and depressurized by the ejector 77B. The refrigerant decompressed by the ejector 77B is separated into a gas phase and a liquid phase by the gas-liquid separator 77A, the gas phase refrigerant is sucked into the compressor 31, and the liquid phase refrigerant is decompressed by the expander 32B. At 33, heat is exchanged with the outside air and sucked into the ejector 77B. When the refrigerant circuit 91 </ b> C is operated, the refrigerant circuit 91 </ b> C absorbs heat by the heat exchanger 33 and releases heat by the heat exchanger 34, similarly to the refrigerant circuit 91.

The refrigerant circuit 92F includes a compressor 31, a heat exchanger 34, an ejector 77B, a gas-liquid separator 77A, an expander 32C, and heat exchangers 37 and 33, and circulates refrigerant through them to form a refrigeration cycle. In the refrigerant circuit 92F, the high-temperature refrigerant compressed by the compressor 31 is cooled by the heat exchanger 34 and depressurized by the ejector 77B. The refrigerant decompressed by the ejector 77B is separated into a gas phase and a liquid phase by the gas-liquid separator 77A, the gas phase refrigerant is sucked into the compressor 31, and the liquid phase refrigerant is decompressed by the expander 32C, and the heat exchanger The heat of the water in the water storage tank 11 is absorbed by 37, the heat of the outside air is absorbed by the heat exchanger 33, and is sucked into the ejector 77B. When the refrigerant circuit 92F is operated, the refrigerant circuit 92F absorbs heat by the heat exchangers 37 and 33 and releases heat by the heat exchanger 34, similarly to the refrigerant circuit 92A.
Control of the ratio of the refrigerant circuits 91C and 92F to start and stop and the flow rate of the refrigerant is performed similarly to the control of the ratio of the refrigerant circuits 91 and 92A to start and stop and the ratio of the refrigerant flow rate.
The refrigerant circuits 91C and 92F can more reliably recover the expansion energy generated at the time of depressurization, so that the thermal efficiency of the refrigeration cycle can be increased (see JP 2002-318019).

FIG. 10 shows a cooling water heater 220 as a tenth reference example of the cooling water heater. The cooling hot water supply device 220 includes a water storage device 110, a hot water generation device 130H, a cooling device 150, and a drain valve 73A that controls discharge of hot water. The water storage device 110 and the cooling device 150 have already been described.
The hot water generator 130H is configured by adding temperature detectors 39B and 39C to the hot water generator 130A.
In the temperature detector 39C, in order to prevent hot water from running out, the amount of hot water used between the time when the hot water generator 130H is activated and the time when hot water is generated by the heat exchanger 34 is determined in the water tank 11 above the hot water generator 11C. It is arranged at the position where it is stored. The temperature detector 39B is disposed below a predetermined distance from the temperature detector 39C in order to make the hot water generating device 130H start up at an appropriate frequency or generate hot water at a low cost.

The cooling water heater 220 is operated in any one of the winter mode, the intermediate period mode, and the cooling mode. The cooling water heater 220 shifts to the winter mode at a predetermined date and time (for example, midnight on November 1), and shifts to the intermediate mode at another predetermined date and time (for example, at midnight on May 1). When there is hot water in the intermediate period mode, the cooling water heater 220 shifts to the cooling mode at midnight after that time, and immediately before midnight in the cooling mode, the cooling circuit 93 supplies the exhaust heat amount of the past 24 hours. When the exhaust heat amount of the cooling is less than the predetermined heat amount, the mode shifts to the intermediate mode at midnight (in the case of October 31, the winter mode). The predetermined amount of heat is, for example, the amount of heat obtained by multiplying the volume of the water storage tank 11 between the temperature detectors 59 and 39, the temperature difference between the third temperature and the fourth temperature, the specific heat and density of water.
(1) Operation in Winter Mode In the winter mode, an instruction to generate hot water is output when a predetermined hot water generation condition is satisfied and the temperature detected by the temperature detector 59 is lower than the first temperature. The predetermined hot water generation condition is a predetermined time, such that the temperature detector 39C is less than the first temperature.
Operation when there is an instruction for hot water generation:
The refrigerant circuit 91 is operated until the temperature detected by the temperature detector 59 reaches the first temperature.
Operation when there is an instruction for cooling operation:
When the detected temperature of the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 93 is operated. When the detected temperature of the temperature detector 59 is higher than the fourth temperature, the drain valve 73A is opened and drained, and the temperature detector The refrigerant circuit 93 is operated after 59 detects less than the fourth temperature.

(2) Operation in the intermediate period mode In the intermediate period mode, an instruction to generate hot water is output when a predetermined hot water generation condition is satisfied and the temperature detected by the temperature detector 39 is lower than the first temperature. The predetermined hot water generation condition is a predetermined time, such that the temperature detector 39C is less than the first temperature.
Operation when there is an instruction for hot water generation:
When the detected temperature of the temperature detector 39A is lower than the second temperature, the refrigerant circuit 91 is operated. When the detected temperature of the temperature detector 39A is equal to or higher than the second temperature, the refrigerant circuits 91 and 92A are operated simultaneously. Hot water is generated until the detected temperature of 39 is equal to or higher than the first temperature.
Operation when there is an instruction for cooling operation:
When the detected temperature of the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 93 is operated. When the detected temperature of the temperature detector 59 is higher than the fourth temperature, the drain valve 73A is opened and drained, and the temperature detector The refrigerant circuit 93 is operated after 59 detects less than the fourth temperature.
(3) Operation in the cooling mode In the cooling mode, the hot water generation instruction is output when a predetermined hot water generation condition is satisfied and the temperature detected by the temperature detector 39B is lower than the first temperature. The predetermined hot water generation condition is a predetermined time, such that the temperature detector 39C is less than the first temperature.
Operation when there is an instruction for hot water generation:
When the detected temperature of the temperature detector 39A is lower than the second temperature, the refrigerant circuit 91 is operated. When the detected temperature of the temperature detector 39A is equal to or higher than the second temperature, the refrigerant circuits 91 and 92A are operated simultaneously, and the temperature detector Hot water is generated until 39B detects the first temperature or higher.
Operation when there is an instruction for cooling operation:
When the detected temperature of the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 93 is operated. When the detected temperature of the temperature detector 59 is higher than the fourth temperature, the drain valve 73A is opened and drained, and the temperature detector The refrigerant circuit 93 is operated after 59 detects less than the fourth temperature.
The cooling water heater 220 opens the drain valve 73A to drain water, but as shown in the cooling water heater 260, a drain port is disposed between the temperature detectors 59 and 39A, and a drain valve is connected to the drain port. You may drain by opening the drain valve.

The cooling water heater 220 sets the temperature detector 39 and the position of the temperature detector 39B, and the date and time of transition between the winter mode and the intermediate mode to appropriate values according to the local climate, so that regions with different climates are set. The maximum capacity of the water storage tank 11 can be utilized. For example, the temperature detector 39 is disposed at a position where 80% of the maximum water storage amount of the water storage tank 11 is stored in the water storage tank 11 above, and the temperature detector 39B is disposed in the water storage tank 11 above the maximum water storage tank 11. Arrange 30% of the amount of water stored. The cooling and hot water supply apparatus 220 stores hot water of approximately the maximum water storage capacity of the water storage tank 11 at midnight when the late-night electricity charge is applied in the winter when there is a large amount of hot water used, and supplies the amount of hot water required for the winter. In the intermediate period when the amount of hot water used is slightly reduced, 80% of hot water is stored at midnight when the late-night electricity rate is applied, and the amount of hot water required for the intermediate period is supplied and the cooling of the intermediate period Ensuring the volume of chilled water to store waste heat, using less hot water, and storing large amounts of cooling heat by storing a small amount of hot water in the middle of the night when midnight electricity charges are applied during the cooling season when the amount of exhaust heat is large The amount of hot water necessary for the cooling period is supplemented with hot water generated by strong cooling while being stored.
Therefore, the cooling water heater 220 effectively uses the capacity of the water storage tank 11 by changing the ratio of the volume of hot water generated by the hot water generation instruction and the capacity of storing the exhaust heat of the cooling according to the season. 11 sizes can be minimized. Further, the cooling water heater 220 shifts from the intermediate mode to the cooling mode when there is drainage, and shifts from the cooling mode to the intermediate mode when the exhaust heat amount of the cooling is smaller by a predetermined amount of heat. It can correspond to. Furthermore, since the cooling water heater 220 absorbs the heat of the medium temperature water and generates hot water, the generation of the hot water and the thermal efficiency of the cooling are high.

FIG. 11 shows a cooling hot water supply apparatus 230 which is a first embodiment of the cooling hot water supply apparatus of the present invention. The cooling hot water supply device 230 includes a water storage device 110 and a hot water generation device 131. The water storage device 110 has already been described. The hot water generator 131 is configured by adding refrigerant circuits 94 and 95 to the hot water generator 130A.
The refrigerant circuit 94 includes a compressor 31, a heat exchanger 54, an expander 52, and a heat exchanger 53, and circulates refrigerant through them to form a refrigeration cycle. When the refrigerant circuit 94 is operated, the building is cooled by the heat exchanger 53, and the exhaust heat of the cooling is released to the water in the water storage tank 11 by the heat exchanger 54. The refrigerant circuit 95 includes a compressor 31, a heat exchanger 34, an expander 52A, and a heat exchanger 53, and forms a refrigeration cycle by circulating a refrigerant through them. When the refrigerant circuit 95 is operated, the building is cooled by the heat exchanger 53, and hot water is generated by the heat exchanger 34. It is assumed that the opening of the expanders 52 and 52A is adjusted by an external signal.
When operating the refrigerant circuit 91, the control unit closes the expanders 32C, 52, and 52A, operates the refrigerant circuit 92A, closes the expanders 32B, 52, and 52A, and operates the refrigerant circuits 91 and 92A simultaneously. When the expanders 52 and 52A are closed and the refrigerant circuit 94 is operated, the expanders 32B and 32C and 52A are closed, and when the refrigerant circuit 95 is operated, the expanders 32B, 32C and 52 are closed, and the refrigerant circuits 91 and 95 are operated. Are simultaneously operated, the expanders 32C and 52 are closed, and when the refrigerant circuits 92A and 95 are simultaneously operated, the expanders 32B and 52 are closed.
Refrigerant circuits 91, 92A, 94, 95, expanders 32B, 32C, 52, 52A, heat exchangers 33, 34, 37, 54, and 53 are the first refrigerant circuit, second refrigerant circuit, and fourth refrigerant of the present invention, respectively. Corresponds to circuit, fifth refrigerant circuit, first expander, second expander, third expander, fourth expander, heat transfer means, hot water generating heat exchanger, heat absorption means, heat dissipation means, and building heat exchange means. .

When the refrigerant circuits 91, 92A, and 95 are operated, the compressor 31 is operated at a high speed operation that compresses the refrigerant to a high pressure and a high temperature (for example, 90 degrees), and hot water is generated. When the refrigerant circuit 94 is operated, the compressor 31 is operated at a low speed operation that is slower than the high speed operation, and the pressure and temperature of the compressed refrigerant are lower than that at the high speed operation, and the temperature is, for example, 50 degrees. When carbon dioxide is used as the refrigerant, a supercritical refrigeration cycle exceeding the critical point is formed when the compressor 31 is operated at high speed, and a refrigeration cycle not exceeding the critical point is formed when the compressor 31 is operated at low speed. Preferably it is formed. The refrigerant used may be an HFC refrigerant or another refrigerant.
The operation of the refrigerant circuit 95 is a strong cooling operation with a high cooling capacity, and the operation of the refrigerant circuit 94 is a weak cooling operation with a low cooling capacity. The weak cooling operation can be performed by simultaneous operation of the refrigerant circuit 95 and the refrigerant circuit 91 or 92A. In the simultaneous operation of the refrigerant circuits 91 and 95, the opening degree of the expanders 32B and 52A is adjusted so that the compressor 31 operates at high speed and the flow rate of the refrigerant flowing through the heat exchanger 53 becomes a flow rate corresponding to weak cooling. In addition to performing weak cooling, hot water is generated from the exhaust heat of the weak cooling and the heat of the outside air. In the simultaneous operation of the refrigerant circuits 92A and 95, the opening degree of the expanders 32C and 52A is adjusted so that the compressor 31 is operated at a high speed and the flow rate of the refrigerant flowing through the heat exchanger 53 becomes a flow rate corresponding to weak cooling. While performing the weak cooling, hot water is generated from the exhaust heat of the weak cooling and the heat of the water in the water storage tank 11.
Since the refrigerants flowing out of the heat exchangers 53 and 33 have different states (dryness and superheat degree), the superheat degree and the like are detected after making the refrigerant in the same state, and the gas-phase refrigerant is put into the compressor 31. Is preferred.

In order to generate and cool hot water with one compressor, the cooling / hot water supply device 230 may be instructed to cool while hot water is being generated, or may be instructed to generate hot water during cooling. Note that hot water generation means that the refrigerant circuit 91 or the refrigerant circuit 92A is in operation or the refrigerant circuits 91 and 92A are in operation at the same time. The cooling instruction includes a strong cooling operation instruction and a weak cooling operation instruction.
(A) Operation when hot water is instructed when not in cooling The hot water generator 131 operates in the same manner as the hot water generator 130A.
(B) Operation when there is a cooling instruction when hot water is not being generated Operation when a weak cooling operation is instructed:
When the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 94 is operated. When the temperature detected by the temperature detector 59 is equal to or higher than the fourth temperature, the first exhaust heat treatment or the second exhaust heat treatment is performed. The first waste heat treatment has already been described. In the second exhaust heat treatment, a refrigerant circuit that forms a refrigeration cycle by sequentially connecting the compressor 31, the heat exchanger 33, the expander 52A, and the heat exchanger 53 by adding a valve, a four-way valve, or the like to the refrigerant path. This is a process of operating and releasing the exhaust heat of the cooling to the outside air. Note that the fourth temperature in the weak cooling operation is a temperature at which the thermal efficiency of the refrigerant circuit 94 is lowered.
Operation in case of strong cooling operation instruction:
When the detected temperature of the temperature detector 59 is lower than the fifth temperature, the refrigerant circuit 95 is operated. When the detected temperature of the temperature detector 59 is equal to or higher than the fifth temperature, the first exhaust heat treatment or the second exhaust heat treatment is performed. The temperature detected by the temperature detector 59 is made lower than the fifth temperature.

(C) Operation when there is a cooling instruction during hot water generation Operation when a weak cooling operation instruction is given:
When the refrigerant circuit 91 is in operation, the operation of the refrigerant circuit 91 is gradually shifted to simultaneous operation of the refrigerant circuits 91 and 95. When the refrigerant circuit 92A is in operation, the operation of the refrigerant circuit 92A is gradually shifted to simultaneous operation of the refrigerant circuits 92A and 95. During simultaneous operation of the medium circuits 91 and 92A, the simultaneous operation of the refrigerant circuits 91 and 92A is gradually shifted to the simultaneous operation of the refrigerant circuits 92A and 95.
Operation in case of strong cooling operation instruction:
The hot water generation operation is gradually shifted to the operation of the refrigerant circuit 95.
The hot water generation operation is the operation of the refrigerant circuit 91 or the refrigerant circuit 92A or the simultaneous operation of the refrigerant circuits 91 and 92A. Further, for example, when the refrigerant circuit 91 is gradually shifted to the refrigerant circuit 95, the refrigerant circuits 91 and 95 are operated simultaneously, the amount of refrigerant flowing through the refrigerant circuit 91 is gradually reduced, and the refrigerant flowing through the refrigerant circuit 95 is reduced. The amount is gradually increased, and when the transition is completed, the amount of refrigerant flowing through the refrigerant circuit 91 disappears, and all the refrigerant flows through the refrigerant circuit 95. Transient phenomena are suppressed by the gradual transition.
(D) Operation when there is an instruction to generate hot water during cooling Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 95:
The operation of the refrigerant circuit 95 is continued.
Operation in the case of a hot water generation instruction during operation of the refrigerant circuit 94:
When the compressor 31 is shifted from the low speed operation to the high speed operation and the detected temperature of the temperature detector 39A is lower than the second temperature, the operation of the refrigerant circuit 94 is shifted to the simultaneous operation of the refrigerant circuits 91 and 95. When the detected temperature of 39A is equal to or higher than the second temperature, the operation is shifted to the simultaneous operation of the refrigerant circuits 92A and 95.
The cooling hot water supply device 230 operates the compressor 31 at high speed in the strong cooling operation and generates hot water by the exhaust heat of the cooling, so that the thermal efficiency of cooling and hot water generation is extremely high, and the compressor 31 operates at a low speed in the weak cooling operation. So the thermal efficiency of cooling is high. Furthermore, since the cooling and hot water supply apparatus 220 generates and cools hot water with a single compressor, it is inexpensive and small.

FIG. 12 shows a cooling hot water supply apparatus 230A which is a second embodiment of the cooling hot water supply apparatus of the present invention. The cooling hot water supply device 230A includes a water storage device 110 and a hot water generation device 131A. The water storage device 110 has already been described.
The hot water generator 131A includes refrigerant circuits 91, 92A, 94, 95A, a water circulation path 38, and a pump 36. Refrigerant circuits 91, 92A and 94 have already been described. The refrigerant circuit 95A includes a compressor 31, a heat exchanger 34, an expander 32B, and a heat exchanger 53, and forms a refrigeration cycle by circulating a refrigerant through them.

When operating the refrigerant circuit 91, the control unit opens the valve 35B, closes the valve 35C and the expanders 32C and 52, and when operating the refrigerant circuit 92A, closes the valve 35C and the expanders 32B and 52, When operating 92A simultaneously, valve 35B is opened, valve 35C and expander 52 are closed, and when refrigerant circuit 94 is operated, valve 35C and expanders 32B and 32C are closed, and when operating refrigerant circuit 95A, valve 35C is operated. When the refrigerant circuit 92A and 95A are operated simultaneously, the valve 35B and the expander 52 are closed, and when the refrigerant circuit 1 and 95A are operated simultaneously, the expanders 32C and 52 are opened. Is closed and the ratio of the opening degree of the valves 35B and 35C is controlled. The valves 35B and 35C can be replaced with three-way valves.
Refrigerant circuits 91, 92A, 94, 95A, expanders 32B, 32C, 52, heat exchangers 33, 34, 37, 54, and 53 are the first refrigerant circuit, second refrigerant circuit, and fourth refrigerant circuit of the present invention, respectively. It corresponds to a fifth refrigerant circuit, a first expander, a second expander, a third expander, a heat transfer means, a hot water generating heat exchanger, a heat absorption means, a heat dissipation means, and a building heat exchange means.
The refrigerant circuits 91, 92A, 94, and 95A function in the same manner as the refrigerant circuits 91, 92A, 94, and 95 of the hot water generator 131, respectively. Therefore, the cooling water heater 230A functions in the same manner as the cooling water heater 230.

FIG. 13 shows a cooling hot water supply apparatus 230B which is a third embodiment of the cooling hot water supply apparatus of the present invention. The cooling hot water supply device 230B includes a water storage device 110 and a hot water generation device 131B. The water storage device 110 has already been described. The hot water generator 131B includes refrigerant circuits 91, 92A, 94, 95B, a water circulation path 38, and a pump 36. Refrigerant circuits 91, 92A and 94 have already been described. The refrigerant circuit 95B includes a compressor 31, a heat exchanger 34, an expander 32C, and a heat exchanger 53, and forms a refrigeration cycle by circulating a refrigerant through them.
When operating the refrigerant circuit 91, the control unit closes the expanders 32C and 52, and when operating the refrigerant circuit 92A, opens the valve 35D, closes the valve 35E and the expanders 32B and 52, and simultaneously connects the refrigerant circuits 91 and 92A. When operating, the valve 35D is opened, the valve 35E and the expander 52 are closed, and when operating the refrigerant circuit 94, the valve 35E and the expanders 32B and 32C are closed, and when operating the refrigerant circuit 95B, the valve 35E is opened, When the valve 35D and the expanders 32B and 52 are closed and the refrigerant circuits 92A and 95B are simultaneously operated, the valves 35B and 35E are opened, the expanders 32B and 52 are closed, and the refrigerant circuits 91 and 95B are simultaneously operated. And the valve 35D and the inflator 52 are closed. The valves 35D and 35E can be replaced with three-way valves.

Refrigerant circuits 91, 92A, 94, 95B, expanders 32B, 32C, 52, heat exchangers 33, 34, 37, 54, and 53 are the first refrigerant circuit, second refrigerant circuit, and fourth refrigerant circuit of the present invention, respectively. It corresponds to a fifth refrigerant circuit, a first expander, a second expander, a third expander, a heat transfer means, a hot water generating heat exchanger, a heat absorption means, a heat dissipation means, and a building heat exchange means.
The refrigerant circuits 91, 92A, 94, and 95B function in the same manner as the refrigerant circuits 91, 92A, 94, and 95 of the hot water generator 131, respectively. Therefore, the cooling water heater 230B functions in the same manner as the cooling water heater 230.

FIG. 14 shows a cooling hot water supply apparatus 230C which is a fourth embodiment of the cooling hot water supply apparatus of the present invention. The cooling hot water supply device 230D includes a water storage device 110 and a hot water generation device 131C. The water storage device 110 has already been described.
The hot water generator 131C includes refrigerant circuits 91, 92A, 94, 95C, a water circulation path 38, and a pump 36. Refrigerant circuits 91, 92A and 94 have already been described. The refrigerant circuit 95C includes the compressor 31, the heat exchanger 34, the expander 52, and the heat exchanger 53, and forms a refrigeration cycle by circulating the refrigerant through them.
When the control unit operates the refrigerant circuit 91, the valves 35F and 35G and the expander 32C are closed, and when the refrigerant circuit 92A is operated, the valve 35F and 35G and the expander 32B are closed and the refrigerant circuits 91 and 92A are operated. When the refrigerant circuit 94 is operated by closing the valves 35F and 35G, the valve 35F is opened, the valve 35G and the expanders 32B and 32C are closed, and when the refrigerant circuit 95C is operated, the valve 35G is opened and the valve 35F and the expander are operated. When 32B and 32C are closed and the refrigerant circuits 92A and 95C are operated, the valve 35G is opened, and the valve 35F and the expander 32B are closed. When the refrigerant circuits 1 and 95C are operated, the valve 35G is opened and the valve 35F and the expander are operated. Close 32C.
Refrigerant circuits 91, 92A, 94, 95C, expanders 32B, 32C, 52, heat exchangers 33, 34, 37, 54, and 53 are the first refrigerant circuit, second refrigerant circuit, and fourth refrigerant circuit of the present invention, respectively. It corresponds to a fifth refrigerant circuit, a first expander, a second expander, a third expander, a heat transfer means, a hot water generating heat exchanger, a heat absorption means, a heat dissipation means, and a building heat exchange means.
The refrigerant circuits 91, 92A, 94, and 95C function in the same manner as the refrigerant circuits 91, 92A, 94, and 95 of the hot water generator 131, respectively. Therefore, the cooling water heater 230C functions in the same manner as the cooling water heater 230.

FIG. 15 shows a cooling hot water supply apparatus 240 which is a fifth embodiment of the cooling hot water supply apparatus of the present invention. The cooling hot water supply device 240 includes a water storage device 110, a hot water generation device 131D, and a drain valve 73A that controls discharge of hot water. The water storage device 110 has already been described.
The hot water generator 131D has a configuration in which temperature detectors 39B and 39C are added to the hot water generator 131.
In the temperature detector 39C, in order to prevent hot water from running out, the amount of hot water used between the time when the hot water generator 131D is activated and the time when hot water is generated by the heat exchanger 34 is stored in the water storage tank 11 at the upper part thereof. It is arranged at the position where it can be stored. The temperature detector 39B is disposed below a predetermined distance from the temperature detector 39C in order to make the hot water generating device 131D start up at an appropriate frequency or generate hot water at a low cost.

The cooling hot water supply apparatus 240 is operated in any one of the winter mode, the intermediate period mode, and the cooling mode similar to the cooling hot water supply apparatus 220. Transition between modes of the cooling and hot water supply apparatus 240 is performed in the same manner as the cooling and hot water supply apparatus 220.
When the refrigerant circuits 91, 92A, and 95 are operated, similarly to the cooling water heater 230, the compressor 31 is operated at a high speed operation to generate hot water, and when the refrigerant circuit 94 is operated, the compressor 31 is operated at a high speed. Driven by driving, the building is cooled slightly.
Therefore, the operation of the cooling and hot water supply apparatus 240 is an operation in which the cooling and hot water supply apparatuses 220 and 230 are combined.

(1) Operation in winter mode In the cooling mode, an instruction to generate hot water is output when a predetermined hot water generation condition is satisfied and the temperature detected by the temperature detector 59 is lower than the first temperature. The detected temperature is less than the first temperature during hot water generation. The predetermined hot water generation condition is a predetermined time, such that the temperature detector 39C is less than the first temperature.
(A) The operating refrigerant circuit 91 is operated when there is an instruction to generate hot water when not in cooling, and hot water is generated until the temperature detected by the temperature detector 59 reaches the first temperature or higher.
(B) Operation when there is a cooling instruction when hot water is not being generated Operation when a weak cooling operation is instructed:
When the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 94 is operated. When the detected temperature of the temperature detector 59 is equal to or higher than the fourth temperature, the drain valve 73A is opened and drained, and the refrigerant circuit 94 is operated after the detected temperature of the temperature detector 59 is lower than the fourth temperature.
Operation in case of strong cooling operation instruction:
When the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 95 is operated. When the temperature detected by the temperature detector 59 is equal to or higher than the fourth temperature, the drain valve 73A is opened and drained, and the refrigerant circuit 95 is operated after the temperature detected by the temperature detector 59 is lower than the fourth temperature.
(C) Operation when there is a cooling instruction during hot water generation Operation when a strong cooling operation is instructed:
The hot water generation operation is gradually shifted to the operation of the refrigerant circuit 95.
Operation when instructed to cool air operation:
The hot water generation operation is gradually shifted to simultaneous operation of the refrigerant circuits 91 and 95.
(D) Operation when there is an instruction to generate hot water during cooling Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 95:
The operation of the refrigerant circuit 95 is continued.
Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 94:
The compressor 31 is shifted from the low speed operation to the high speed operation, and the operation of the refrigerant circuit 94 is shifted to the simultaneous operation of the refrigerant circuits 91 and 95.

(2) Operation in Intermediate Mode In the intermediate mode, an instruction to generate hot water is output when a predetermined hot water generation condition is satisfied and the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detector 39 The detected temperature is less than the first temperature during hot water production. The predetermined hot water generation condition is a predetermined time, such that the temperature detector 39C is less than the first temperature.
(A) When the detected temperature of the operating temperature detector 39A is less than the second temperature when there is an instruction to generate hot water when not cooling, the refrigerant circuit 91 is operated and the detected temperature of the temperature detector 39A is the second temperature In the above case, the refrigerant circuits 91 and 92A are operated simultaneously, and hot water is generated until the temperature detected by the temperature detector 39 becomes equal to or higher than the first temperature.
(B) Operation when there is a cooling instruction when hot water is not being generated Operation when a weak cooling operation is instructed:
When the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 94 is operated. When the detected temperature of the temperature detector 59 is equal to or higher than the fourth temperature, the drain valve 73A is opened and drained, and the refrigerant circuit 94 is operated after the detected temperature of the temperature detector 59 is lower than the fourth temperature.
Operation in case of strong cooling operation instruction:
When the temperature detected by the temperature detector 59 is lower than the fifth temperature, the refrigerant circuit 95 is operated. When the temperature detected by the temperature detector 59 is equal to or higher than the fifth temperature, the drain valve 73A is opened and drained, and the refrigerant circuit 95 is operated after the temperature detected by the temperature detector 59 is lower than the fifth temperature.

(C) Operation when there is a cooling instruction during hot water generation Operation when a strong cooling operation is instructed:
The hot water generation operation is gradually shifted to the operation of the refrigerant circuit 95.
Operation in the case of instructions for weak cooling operation:
When the refrigerant circuit 91 is in operation, the operation of the refrigerant circuit 91 is gradually shifted to simultaneous operation of the refrigerant circuits 91 and 95. When the refrigerant circuit 92A is in operation, the operation of the refrigerant circuit 92A is gradually shifted to simultaneous operation of the refrigerant circuits 92A and 95. During simultaneous operation of the medium circuits 91 and 92A, the simultaneous operation of the refrigerant circuits 91 and 92A is gradually shifted to the simultaneous operation of the refrigerant circuits 92A and 95.
(D) Operation when there is an instruction to generate hot water during cooling Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 95:
The operation of the refrigerant circuit 95 is continued.
Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 94:
The compressor 31 is shifted from the low speed operation to the high speed operation, and the operation of the refrigerant circuit 94 is shifted to the simultaneous operation of the refrigerant circuits 91 and 95 when the temperature detected by the temperature detector 39A is lower than the second temperature. When the detected temperature of 39A is equal to or higher than the second temperature, the operation is shifted to the simultaneous operation of the refrigerant circuits 92A and 95.

(3) Operation in the cooling mode In the cooling mode, a hot water generation instruction is output when a predetermined hot water generation condition is satisfied and the temperature detected by the temperature detector 39B is lower than the first temperature. The detected temperature is less than the first temperature during hot water generation. The predetermined hot water generation condition is that the temperature detector 39C is less than the first temperature, a predetermined time, or the like.
(A) When the detected temperature of the operating temperature detector 39A is less than the second temperature when there is an instruction to generate hot water when not cooling, the refrigerant circuit 91 is operated, and the detected temperature of the temperature detector 39A is the second temperature. In the above case, the refrigerant circuits 91 and 92A are operated simultaneously, and hot water is generated until the temperature detector 39B detects the first temperature or higher.
(B) Operation when there is a cooling instruction when hot water is not being generated Operation when a weak cooling operation is instructed:
When the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 94 is operated. When the detected temperature of the temperature detector 59 is equal to or higher than the fourth temperature, the drain valve 73A is opened and drained, and the refrigerant circuit 94 is operated after the detected temperature of the temperature detector 59 is lower than the fourth temperature.
Operation when instructing strong cooling operation:
When the temperature detected by the temperature detector 59 is lower than the fifth temperature, the refrigerant circuit 95 is operated. When the temperature detected by the temperature detector 59 is equal to or higher than the fifth temperature, the drain valve 73A is opened and drained, and the refrigerant circuit 95 is operated after the temperature detected by the temperature detector 59 is lower than the fifth temperature.

(C) Operation when there is a cooling instruction during hot water generation Operation when a strong cooling operation is instructed:
The hot water generation operation is gradually shifted to the operation of the refrigerant circuit 95.
Operation in the case of instructions for weak cooling operation:
The hot water generation operation is gradually shifted to simultaneous operation of the refrigerant circuits 91 and 95 when the detected temperature of the temperature detector 39A is lower than the second temperature, and the detected temperature of the temperature detector 39A is equal to or higher than the second temperature. The operation is gradually shifted to simultaneous operation of the refrigerant circuits 92A and 95.
(D) Operation when there is an instruction to generate hot water during cooling Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 95:
The operation of the refrigerant circuit 95 is continued.
Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 94:
The compressor 31 is shifted from the low speed operation to the high speed operation, and the operation of the refrigerant circuit 94 is shifted to the simultaneous operation of the refrigerant circuits 91 and 95 when the temperature detected by the temperature detector 39A is lower than the second temperature. When the detected temperature of 39A is equal to or higher than the second temperature, the operation is shifted to the simultaneous operation of the refrigerant circuits 92A and 95.

The cooling water heater 240 opens the drain valve 73A to drain water, but as shown in the cooling water heater 260, a drain port is disposed between the temperature detectors 59 and 39A, a drain valve is connected to the drain port, and the drain valve You can open and drain.
Accordingly, the cooling hot water supply device 240 effectively uses the capacity of the water storage tank 11 by changing the ratio of the volume of hot water generated by the hot water generation instruction and the capacity of storing the exhaust heat of the cooling depending on the season. 11 sizes can be minimized. Furthermore, the cooling hot water supply device 240 shifts from the intermediate period mode to the cooling mode when there is drainage, and shifts from the cooling mode to the intermediate period mode when the amount of exhaust heat of the cooling is smaller by a predetermined amount of heat. It can correspond to. Furthermore, since the cooling hot water supply apparatus 240 absorbs the heat of the medium temperature water and generates hot water, the generation of the hot water and the thermal efficiency of the cooling are high, and it can be constructed at low cost by using one compressor.

FIG. 16 shows a cooling hot water supply apparatus 250 as an eleventh reference example of the cooling hot water supply apparatus of the present invention. The cooling hot water supply device 250 includes a water storage device 110C, a hot water generation device 180, a cooling device 150, and a drainage device 170. The cooling device 150 has already been described. The water storage device 110C includes a water storage tank 11B filled with water. The water storage tank 11B has a hot water supply port 12, a water supply port 13, a drain port 71 disposed between the heat exchanger 84 and the temperature detector 59, and water storage. The heat exchangers 54 and 84 in the tank 11 have holes through which tubes through which a refrigerant and a heat medium flow are respectively passed.
The hot water generator 180 includes a heat source 83 (for example, an oil boiler), a heat exchanger 84 that performs heat exchange between the heat medium and water, and heat for circulating the heat medium between the heat source 83 and the heat exchanger 84. A medium circulation path 87 and a temperature detector 89 are provided. The temperature detector 89 is disposed at a position where the amount of hot water used in a period from when the heat source 83 is activated until hot water is generated is stored in the upper water storage tank 11B. The heat exchanger 84 is disposed slightly below the temperature detector 89. This is because the temperature detector 89 detects the temperature of the water in contact with the heat exchanger 84 (the temperature of water approximately equal to the temperature of the heat exchanger 84 when no heat medium flows through the heat exchanger 84, the heat exchanger This is because the temperature of water on the return path (downward path) of natural convection generated by the water heated by the heat exchanger 84 is detected when the heat medium is flowing in 84.
The drainage device 170 includes a drainage port 71, a drainage pipe 72, and a drainage valve 73 that controls drainage.

When the temperature detector 89 is lower than the first temperature, the heat source 83 is operated. When the heat source 83 is operated, the heat medium is circulated through the heat medium circulation path 87, the water is changed into hot water by the heat exchanger 84, and the hot water rises by natural convection. When the temperature detector 89 becomes equal to or higher than the first temperature, the operation of the heat source 83 is stopped. At that time, the water in the region from the top of the water storage tank 11B to the position of the temperature detector 89 is changed to hot water.
When the cooling device 150 is operated, the exhaust heat of the cooling is released to the water in the water storage tank 11 by the heat exchanger 54, and the temperature of the water rises. By the way, the thermal efficiency of the cooling device 150 rapidly decreases when the temperature of the water in contact with the heat exchanger 54 becomes the fourth temperature or higher. When the temperature detector 59 detects the fourth temperature, the drain valve 73 is opened and water is discharged from the drain port 71. When the temperature detector 59 is cooled by the water flowing in from the water supply port 13 and the detected temperature falls below the fourth temperature, the drain valve 73 is closed. That is, the temperature detected by the temperature detector 59 is kept near the fourth temperature by controlling the drain valve 73. Therefore, the thermal efficiency of the cooling device 150 is high. In addition, since the drain port 71 is below the heat exchanger 84, hot water is not discharged.
Furthermore, compared to a conventional cooling device that releases exhaust heat from the cooling air to the outside with a heat exchanger and a fan, the cooling device 150 has a higher thermal efficiency than the conventional cooling device because the fan does not need to be operated.
Therefore, the cooling hot water supply apparatus 250 provides water cooling with high thermal efficiency, and does not waste hot water.

FIG. 17 shows a hot water supply apparatus 310 as a first reference example of the hot water supply apparatus. The hot water supply device 310 includes a water storage device 110, a hot water generation device 130A, and a heat collection device 160. The water storage device 110 and the hot water generation device 130A have already been described. The heat collector 160 is a solar heat collector 63 that collects solar heat, a heat exchanger 64 disposed at the bottom of the water storage tank 11, and heat for circulating a heat medium between the solar heat collector 63 and the heat exchanger 64. A medium circulation path 67 and a pump 66 for circulating the heat medium in the heat medium circulation path 67 are provided. The heat collector 160 is an example that generates medium-temperature water, and another example that generates medium-temperature water is the cooling device 150.
The flow rate of the refrigerant flowing through the refrigerant circuits 91 and 92A is controlled by the expanders 32B and 32C and a controller that controls them.

The heat medium warmed by the solar heat collector 63 circulates in the heat medium circulation path 67, warms the water in the water storage tank 11 by the heat exchanger 64, and raises the temperature of the water. Since the temperature of the heat medium heated by the solar heat collector 63 depends on the temperature and the intensity of solar radiation, it varies within a wide temperature range (for example, 20 to 80 degrees). Therefore, the temperature range of the water in the water tank 11 heated by the heat exchanger 64 is also wide. That is, the heat collecting device 160 generates hot water in the water storage tank 11 and also generates intermediate temperature water.
The hot water generating device 130A is a pump that circulates water when predetermined hot water generating conditions are satisfied, the detected temperature of the temperature detector 39 is lower than the first temperature, and the detected temperature of the temperature detector 39A is equal to or higher than the second temperature. The heat of the water in the vicinity of the heat exchanger 37 is absorbed by the heat exchanger 37 without using the heat, and hot water is generated with high heat efficiency, and the water in the vicinity of the heat exchanger 37 and below is cooled. Therefore, the thermal efficiency of the hot water generation of the hot water generator 130A is higher than the thermal efficiency of the hot water generation of the conventional apparatus that cools the medium-temperature water using a pump that circulates water.

FIG. 18 shows a hot water supply device 320 which is a second reference example of the hot water supply device. The hot water supply device 320 includes a water storage device 110D, a hot water generation device 130C, and a heat collection device 160A. The hot water generator 130C has already been described.
The water storage device 110D includes a water storage tank 11A filled with water, a distributor 24 connected to the intermediate port 14 in the water storage tank 11A, a latent heat storage body 21A disposed below the distributor 24, and a dispersion plate 27. The temperature detector 39A is disposed below the disperser 24.
The heat collector 160A includes a solar heat collector 63, a heat exchanger 64A that performs heat exchange between the heat medium flowing in the heat medium flow path and the water flowing in the water flow path, and the heat medium flow of the solar heat collector 63 and the heat exchanger 64A. The heat medium circulation path 67A for circulating the heat medium between the paths, the pump 66 for circulating water through the heat medium circulation path 67A, the water supply port 13 and the intermediate port 14 via the water flow path of the heat exchanger 64A. A water circulation path 68 connected to the water circulation path 68 and a pump 66A for circulating water through the water circulation path 68.

FIG. 26 shows a perspective view of an embodiment of the disperser 24. The disperser 24 has a structure in which two annular dispersive tubes 25 and 25A are arranged on substantially the same plane, and the disperser connection port 26 is connected by a connecting tube 25B. The dispersion pipes 25 and 25A have a plurality of dispersion holes 26A through which water flows. The disperser 24 is disposed substantially horizontally, and the disperser connection port 26 is connected to the intermediate port 14. That is, the disperser 24 forms a flow path for allowing water to flow between the disperser connection port 26 and the plurality of dispersive holes 26A arranged in the vicinity of the horizontal section of the water storage tank 11A. In other words, the disperser 24 disperses and blows out the water that has flowed into the disperser connection port 26 near the horizontal cross section of the water storage tank 11A, or disperses water taken from the horizontal cross section of the water storage tank 11A. It flows out from the mouth 26.
The dispersion plate 27 is a plate-like member that has a plurality of holes through which water passes and is disposed substantially horizontally. It is for flowing evenly.
As the latent heat storage material of the latent heat storage body 21A, a material having characteristics (melting temperature, heat of fusion, safety, price, etc.) that can utilize solar heat to the maximum is selected. The optimum characteristics of the latent heat storage material differ depending on the amount of solar radiation received by the solar heat collector 63, the temperature, the characteristics of the solar heat collector 63, the characteristics of the hot water generator 130C, and the like. Here, it is assumed that the melting temperature of the latent heat storage body 21A is higher than the fifth temperature. For example, paraffin C22H46 (melting temperature 44 degrees) can be used.

The operation of hot water supply apparatus 320 when hot water is not discharged will be described. When the heat medium is heated by the solar heat collector 63 and the pumps 66 and 66A are operated, the heated heat medium warms the water circulating in the water circulation path 68 through the heat exchanger 64A. The warmed water is dispersed and blown out from the dispersion hole 26A of the disperser 24 to the vicinity of the horizontal cross section of the water storage tank 11A, descends between the latent heat storage bodies 21A, passes through the holes of the dispersion plate 27, and from the water supply port 13 to the water circulation path. 68. The water in the water storage tank 11A between the disperser 24 and the dispersion plate 27 flows between the latent heat storage bodies 21A substantially in parallel downward. That is, the water warmed by the heat exchanger 64A comes into contact with all the latent heat storage bodies 21A substantially uniformly and transfers heat to the latent heat storage bodies 21A. When a part of the latent heat storage body 21A is a solid phase and the temperature of water in contact with the latent heat storage body 21A is higher than the melting temperature of the latent heat storage body 21A, the descending water melts the latent heat storage body 21A.
In addition, when the temperature of the water blown out from the disperser 24 is higher than the temperature of the water near the disperser 24, a part of the water blown out from the disperser 24 rises and convection occurs above the disperser 24. When the temperature of water blown from the disperser 24 is lower than the temperature of water near the disperser 24, the water blown from the disperser 24 falls. The water below the disperser 24 descends regardless of the temperature of the water blown from the disperser 24, enters the water circulation path 68 from the water supply port 13, and circulates in the water circulation path 68.

When the detected temperature of the temperature detector 39A is equal to or higher than the second temperature and lower than the first temperature when the hot water generator 130C is operated, the refrigerant circuits 91 and 92C are operated simultaneously, and the pumps 36 and 36A are operated. By the operation of the pump 36A, the water taken from the disperser 24 is cooled by the refrigerant in the heat exchanger 37A, and returned from the water supply port 13 to the water tank 11A. The water returned to the water storage tank 11A is dispersed by the dispersion plate 27, rises between the latent heat storage bodies 21A, is warmed by the latent heat storage bodies 21A, and is taken into the disperser 24 again. That is, the water cooled by the heat exchanger 37A comes into contact with all the latent heat storage bodies 21A substantially uniformly and transfers heat to the latent heat storage bodies 21A. When a part of the latent heat storage body 21A is in a liquid phase and the temperature of water in contact with the latent heat storage body 21A is lower than the solidification temperature of the latent heat storage body 21A, the rising water solidifies the latent heat storage body 21A. On the other hand, the refrigerant circuit 92C absorbs heat from water by the heat exchanger 37A and generates hot water by the heat exchanger 34. That is, hot water is generated by the solidification heat of the latent heat storage body 21A.
Therefore, the hot water supply device 320 makes the water heated by the solar heat substantially uniformly contact all the latent heat storage bodies 21A by the disperser 24 and the dispersion plate 27 to store the solar heat in the latent heat storage bodies 21A and to store the water in all the latent heat storage bodies. The hot water is generated by taking out the heat stored in the latent heat storage body 21A by bringing it into contact with 21A substantially uniformly. Accordingly, the heat capacity of the latent heat storage body 21A is effectively utilized by the disperser 24 to the maximum.

FIG. 19 shows a hot water supply device 320A which is a third reference example of the hot water supply device. The hot water supply device 320A includes a water storage device 110E, a hot water generation device 130C, and a cooling device 150A. The cooling device 150A and the hot water generating device 130C have already been described. The water storage device 110E is obtained by changing the latent heat storage body 21A of the water storage device 110D to the latent heat storage body 21 used in the cooling hot water supply device 210D.

The operation of the hot water generating device 130C is different from the operation of the hot water generating device 130C of the cooling hot water supply device 210C because the latent heat storage body 21A exists, and will be described. When a predetermined hot water generation condition is satisfied, the temperature detected by the temperature detector 39 is lower than the first temperature, and the temperature detected by the temperature detector 39A is lower than the sixth temperature, the refrigerant circuit 91 and the pump 36 are operated, Hot water is generated until the temperature detected by the temperature detector 39 reaches the first temperature or higher. When the temperature detected by the temperature detector 39A is equal to or higher than the sixth temperature and lower than the first temperature, the refrigerant circuits 91 and 92C are operated simultaneously, and the pumps 36 and 36A are operated.
When the refrigerant circuits 91 and 92C and the pumps 36 and 36A are operated, water is circulated through the water circulation path 38A, and the water cooled by the heat exchanger 37A flows into the water storage tank 11A from the water supply port 13 and is dispersed by the dispersion plate 27. The water tank 11 </ b> A is dispersed and rises in the horizontal cross section. The rising water flows from the intermediate port 14 to the water circulation path 38A through the dispersion hole 26A of the disperser 24. The water between the disperser 24 and the dispersal plate 27 flows substantially uniformly upward and comes into contact with all the latent heat storage bodies 21. When the temperature of the water in contact with the latent heat storage body 21 is lower than the solidification temperature of the latent heat storage body 21, the liquid phase latent heat storage body 21 is solidified. If the heat of solidification of the latent heat storage body 21 is equal to or less than the amount of heat necessary for producing hot water, all the latent heat storage bodies 21 are solidified.

When there is an instruction for cooling operation, the refrigerant circuit 93A and the pump 56 are operated, and the water warmed by the heat exchanger 54A is dispersed and blown out by the disperser 24 to the horizontal section of the water storage tank 11A. By means of the disperser 24 and the disperser plate 27, the water between the disperser 24 and the disperser plate 27 flows substantially uniformly downward and contacts all the latent heat storage bodies 21. When the water heated by the heat exchanger 54A is higher than the melting temperature of the latent heat storage body 21, the solid phase latent heat storage body 21 melts. If the heat of fusion of the latent heat storage body 21 is equal to or greater than the amount of exhaust heat of the cooling, the latent heat storage body 21 stores all the exhaust heat of the cooling.
In other words, the exhaust heat of the cooling device 150 </ b> A is stored in the latent heat storage body 21 by the disperser 24 and the dispersion plate 27 to the maximum extent. And the hot water production | generation apparatus 130C absorbs the heat | fever stored in the latent heat storage body 21 by the disperser 24 and the dispersion plate 27 substantially to the maximum, and produces | generates hot water. Therefore, the heat capacity of the latent heat storage body 21 is effectively utilized by the disperser 24 to the maximum extent.

FIG. 20 shows a hot water supply apparatus 330 which is a fourth reference example of the hot water supply apparatus. The hot water supply device 330 includes a water storage device 110F and a hot water generation device 132.
The water storage device 110F includes a water storage tank 11C filled with water and a partition member 17, and the water storage tank 11C includes a hot water supply port 12, a water supply port 13, and an inflow port 15 disposed above a vertical position of the temperature detector 39B. Have. The partition member 17 forms a flow path in which water flowing in from the inlet 15 rises or falls.
The hot water generator 132 is located near the bottom of the water circulation path 38B connecting the water supply port 13 and the inlet 15, the pump 36 for circulating water through the water circulation path 38B, the refrigerant circuit 91, the temperature detector 39D, and the water storage tank 11C. A temperature detector 39E is provided. The refrigerant circuit 91 includes a compressor 31, a heat exchanger 34, an expander 32B, and a heat exchanger 33. A refrigerant is circulated through the refrigerant circuit 91 to form a refrigeration cycle, and the refrigerant circuit 91 is the same as the refrigerant circuit 91 of the cooling water heater 210A. is there. The temperature detector 39D is arranged at a position where the amount of hot water used in the period from when the refrigerant circuit 91 is activated until hot water is generated is stored in the upper water storage tank 11C.

FIG. 27A shows a cross-sectional view of the water storage tank 11 </ b> C at the position of the inlet 15. FIG. 27B shows a perspective view of the partition member 17. The partition member 17 is a half-square cylinder, and is arranged so that both sides parallel to the axis are in close contact with the inside of the water storage tank 11C substantially vertically and the inlet 15 is located between both sides. The partition member 17 is disposed such that the lower end is substantially horizontal to the position of the temperature detector 39D, and the upper end is spaced from the upper lid of the water storage tank 11C. The flow path 16 is an area between the water storage tank 11 </ b> C and the partition member 17. The water flowing in from the inflow port 15 rises or falls along the channel 16 while mixing with the water in the channel 16. The shape of the partition member 17 may be a semi-cylindrical shape.

When the temperature detected by the temperature detector 39D is lower than the first temperature, the hot water generator 132 is operated to absorb the heat of the outside air and generate hot water in the water storage tank 11C. When the temperature detected by the temperature detector 39E becomes equal to or higher than the first temperature, the operation of the hot water generator 132 is stopped. Note that when the hot water generator 132 is activated, the amount of hot water stored in the upper portion of the temperature detector 39D is sufficient, so that hot water does not run out.
The water storage tank 11C can be made smaller than the water storage tank of a hot water supply device that generates and stores hot water used in one day. However, since the amount of hot water stored in the water storage tank 11C is small, the hot water generator 132 is frequently operated.

While the hot water generator 132 is not operated, the heat of the water in the water circulation path 38A between the inlet 15 and the heat exchanger 34 is released to the outside air through the heat insulating material covering the water circulation path 38A. It may be cooled to near the temperature. When the hot water generator 132 is activated, the temperature detected by the temperature detector 39D is slightly lower than the first temperature, and the inlet 15 is above the temperature detector 39D, so the temperature of the water near the inlet 15 is It is approximately the first temperature. When the hot water generator 132 is activated, the water cooled by the outside air flows into the flow path 16 through the inlet 15, mixes with the water in the flow path 16 and falls, but the water outside the flow path 16 The member 17 does not mix with the water in the flow path 16.
The hot water generator 132 is activated, and after a predetermined activation time has elapsed, the production of hot water is started in the heat exchanger 34. The generated hot water flows into the flow path 16 through the inlet 15. The hot water flowing in from the inflow port 15 rises or falls or partly rises and falls partly in the flow path 16 according to the temperature distribution of the water in the upper part of the water storage tank 11C, thereby increasing the hot water layer.
Therefore, the partition member 17 suppresses the mixing of the low-temperature water flowing into the water storage tank 11C when the hot water generator 132 is activated and the hot water in the water storage tank 11C, and substantially reduces the heat stored in the water storage tank 11C. Make it available to the fullest.

FIG. 21 shows a hot water supply apparatus 330A which is a fifth reference example of the hot water supply apparatus. The hot water supply device 330 </ b> A is obtained by replacing the partition member 17 of the hot water supply device 330 with a flow branch pipe 18. FIG. 28A shows a cross-sectional view of the water storage tank 11 </ b> C at the position of the inlet 15. FIG. 28B shows a perspective view of the flow path branch pipe 18. The flow path branch pipe 18 has a branch port that branches the flow of water in the pipe in the middle, and is arranged vertically inside the water storage tank 11C, and a vertical pipe 28 through which water flows in the pipe, an inlet 15 and a branch port. And a connecting pipe 29 through which water flows. The vertical pipe 28 is disposed such that the lower end is substantially horizontal to the position of the temperature detector 39D and the upper end is spaced from the upper lid of the water storage tank 11C. The flow path 16 </ b> A is a region in the pipe formed by the vertical pipe 28 and the connection pipe 29. The water flowing in from the inflow port 15 flows into the vertical pipe 28 via the connection pipe 29 and rises or descends in the vertical pipe 28.
The shape of the flow channel 16A is different from the shape of the flow channel 16, but performs the same function. Therefore, the operation and effect of hot water supply apparatus 330A are the same as the operation and effect of hot water supply apparatus 330.

FIG. 22 shows a hot water supply device 340 as a sixth reference example of the hot water supply device. The hot water supply device 340 includes a water storage device 110H, a hot water generation device 180A, and a heating device 140.
The water storage device 110 </ b> H includes a water storage tank 11 </ b> D filled with water and a partition member 17 </ b> A. It has an inlet 41 arranged. FIG. 29A shows a cross-sectional view of the water storage tank 11D at the position of the inlet 41. FIG. FIG. 29B is a perspective view of the partition member 17A.
The partition member 17A has a half-tubular shape and includes a plurality of flow holes 19 through which water passes. The partition member 17A is disposed so that both sides parallel to the axis are in close contact with the inside of the water storage tank 11D substantially vertically, and the inflow ports 41 and 15 are located between the both sides. The position of the lower end of the partition member 17A is below the inflow port 41, and the upper end of the partition member 17 is disposed above the inflow port 15 so that there is a gap between the upper lid of the water storage tank 11D. The flow path 16B is an area between the water storage tank 11D and the partition member 17A. The water flowing in from the inflow ports 41 and 15 rises or descends the channel 16B while mixing with the water in the channel 16B.
The shape of the partition member 17A may be a semi-cylindrical shape.

The hot water generator 180A includes a heat source 83A (for example, a fuel cell), a heat exchanger 84A that performs heat exchange between water flowing in the water flow path and a heat medium flowing in the heat medium flow path, and between the heat source 83A and the heat exchanger 84A. A heat medium circulation path 87A for circulating the heat medium, a water circulation path 88 connecting the water supply port 13 and the inflow port 15, a pump 86 for circulating water in the water circulation path 88, and a temperature detector 89A in the water storage tank 11D. 89B is provided. The temperature detector 89A is disposed at a position where the amount of hot water used in the period from when the heat source 83A is activated until hot water is generated is stored in the upper water storage tank 11D, and the temperature detector 89B is the water storage tank 11D. Near the bottom of the.
The heating device 140 is disposed in the middle of the water circulation path 48 that connects the hot water supply port 12 and the inlet 41, and is a heat exchanger that performs heat exchange between the water flowing in the water flow path and the heat medium flowing in the heat medium flow path. 43, a pump 46 that circulates water in the water circulation path 48, a heat exchanger 44 that radiates heat of the heat medium in the room, and a heat medium circulation path that circulates the heat medium between the heat exchangers 43 and 44. 47, and a pump 46A for circulating the heat medium in the heat medium circulation path 47.

The hot water generator 180A is started when the temperature detector 89A detects a temperature lower than the first temperature, and is stopped when the temperature detector 89B detects the first temperature or higher.
When the hot water generator 180A is activated, low-temperature water cooled to the outside air between the heat exchanger 84A and the inlet 15 flows into the flow path 16B through the inlet 15. Since the temperature of the water near the inlet 15 is high, the low-temperature water that has flowed into the flow path 16B descends while mixing with the water in the flow path 16B. The temperature of the descending water gradually increases as a result of mixing, and the temperature of the water in the central portion of the water storage tank 11D descends to a position approximately equal to the temperature of the descending water. A part of the descending water flows to the central portion of the water storage tank 11D through the flow hole 19 of the partition member 17A. If the water storage tank 11D has a temperature stratification that changes from the temperature of the feed water to the temperature of the hot water, the descending water descends to the temperature stratification and increases the thickness of the temperature stratification at the temperature of the descending water. By the way, the position of temperature stratification moves up and down by the generation of hot water and the use of hot water. Regardless of the temperature stratification position, the partition member 17A lowers the low-temperature water flowing from the inlet 15 when the hot water generator 180A is started up to the temperature stratification position while suppressing mixing with the water in the water storage tank 11D. .
The hot water generator 180A is activated, and after a predetermined activation time has elapsed, the hot water generated by the heat exchanger 84A flows into the flow path 16B from the inlet 15. Depending on the temperature distribution of the water in the upper part of the water storage tank 11D, the hot water ascends or descends the flow path 16B or partially rises and partially falls to increase the hot water layer.

When the heat source 83A is a fuel cell, the temperature of the heat medium that releases the exhaust heat of the fuel cell varies greatly depending on the use conditions such as the load of the fuel cell and the environmental conditions such as the air temperature. When the temperature of the heat medium changes greatly, the temperature of the hot water generated by the heat exchanger 84A changes greatly. When the temperature of the hot water generated by the heat exchanger 84A is higher than the temperature of the water in the central portion of the water storage tank 11D, the water flowing in from the inlet 15 rises through the channel 16B while mixing with the water in the channel 16B. The temperature of the rising water is gradually lowered by the mixing, and the temperature of the water in the central portion of the water storage tank 11D rises to a position substantially equal to the temperature of the rising water, and a part of the rising water is separated from the partition member 17A. Through the flow hole 19 to the central portion of the water storage tank 11D and increase the thickness of the rising water temperature layer.
When the temperature of the water heated by the heat exchanger 84A is lower than the temperature of the water in the central portion of the water storage tank 11D, the water flowing in from the inflow port 15 descends while mixing with the water in the flow path 16B. The temperature of the descending water gradually increases due to the mixing, and the temperature of the water in the central portion of the water storage tank 11D descends to a position substantially equal to the temperature of the descending water, and a part of the descending water is separated from the partition member 17A. The thickness of the layer of the temperature of the water flowing down to the center of the water storage tank 11D and descending is increased.
Therefore, the partition member 17A suppresses the mixing of the water flowing in from the inlet 15 and the water in the central portion of the water storage tank 11D, suppresses the decrease in the amount of hot water, and stores a substantially maximum amount of hot water in the water storage tank 11D.

When there is an instruction for heating, the fans of the pumps 46 and 46A and the heat exchanger 44 are operated. Since the heat exchanger 43 performs heat exchange between the water flowing in the water circulation path 48 and the heat medium flowing in the heat medium circulation path 47, the heat of high-temperature water is transmitted to the heat medium, and the heat transferred to the heat medium is heat. The heat is transmitted to the indoor air by the exchanger 44 to heat the room. On the other hand, the water cooled by the heat exchanger 43 flows into the flow path 16B from the inlet 41. Since the flow of water flowing into the flow path 16B is the same as the flow of water flowing into the flow path 16B from the inflow port 15, the description thereof is omitted.
The partition member 17A suppresses the mixing of the water flowing into the flow path 16B from the inlet 41 and the water in the center of the water storage tank 11D, and makes it possible to use the heat stored in the water storage tank 11D substantially as much as possible.
The flow of water that rises or falls while mixing with the water in the flow path 16B and the flow of water that flows through the circulation hole 19 to the central portion of the water storage tank 11D are generated by the flow of water generated by the pump 46 and natural convection. It is caused by the flow of water. When the amount of water that the pump 46 circulates in the water circulation channel 48 is larger than the amount of natural convection, the water flowing into the flow channel 16B from the inlet 41 stays in the vicinity of the inlet 41, and the isothermal surface in the water storage tank 11D is It changes greatly from the horizontal plane. The shape of the isothermal surface in the water storage tank 11D varies greatly depending on the size and quantity of the flow holes 19 and the size of the cross-sectional area of the flow path 16B.

FIG. 23 shows a hot water supply device 340A which is a seventh reference example of the hot water supply device. The hot water supply device 340A includes a water storage device 110I, a hot water generation device 130C, and a heating device 140. The hot water generator 130C and the heating device 140 have already been described. The water storage device 110I includes a water storage tank 11E filled with water and a flow path branch pipe 18A. The water storage tank 11E includes a hot water supply port 12, a water supply port 13, an intermediate port 14, and an inflow port 41.
FIG. 30A shows a cross-sectional view of the water storage tank 11E at the position of the inflow port 41. FIG. 30B is a perspective view of the flow path branch pipe 18A. The flow path branch pipe 18A has a branch port in the middle, and includes a vertical pipe 28A having a plurality of flow holes 19A through which water flows, and a connection pipe 29A connecting the inflow port 41 and the branch port. The position of the lower end of the vertical pipe 28A is in the vicinity of the temperature detector 39, and the upper end of the vertical pipe 28 is arranged so that there is a gap between the upper lid of the water storage tank 11E. The flow path 16C is an area in the pipe formed by the vertical pipe 28A and the connection pipe 29A. The water flowing in from the inflow port 41 flows into the vertical pipe 28A via the connection pipe 29A, and rises or descends in the vertical pipe 28A. The water cooled by the heat exchanger 43 flows from the inlet 41 to the flow path 16C. Since the flow of water flowing into the flow path 16C is the same as the flow of water flowing into the flow path 16B from the inlet 15 described in the hot water supply device 340, description thereof is omitted. When the heating device 140 is operated, a large amount of medium-temperature water is generated. As described above, the operation of the hot water generator 130C generates hot water from the medium-temperature water with high thermal efficiency.
Accordingly, the hot water supply device 340A efficiently uses the heat stored in the water storage tank 11E by the flow path branch pipe 18A for heating, and generates hot water from the medium-temperature water generated by heating with high efficiency.

FIG. 24 shows a cooling hot water supply apparatus 260 which is a sixth embodiment of the cooling hot water supply apparatus of the present invention. The cooling hot water supply device 260 includes a water storage device 110J, a hot water generation device 131E, a heating device 140, and a drainage device 170. The heating device 140 and the drainage device 170 have already been described. The water storage device 110J includes a water storage tank 11F filled with water and a partition member 17A. The water storage tank 11F supplies refrigerant to the hot water supply port 12, the water supply port 13, the intermediate port 14, the inflow port 41, and the heat exchangers 37, 37B, and 54. It has a hole that penetrates the flow tube.
The hot water generator 131E is obtained by adding a refrigerant circuit 96 and a temperature detector 39F to the hot water generator 131D, and changing the water circulation path 38 of the hot water generator 131D to a water circulation path 38B that connects the water supply port 13 and the inlet 15. . The refrigerant circuit 96 includes a compressor 31, a heat exchanger 34, an expander 32E, and heat exchangers 37B and 33, and circulates refrigerant through them to form a refrigeration cycle. The temperature detector 39F and the heat exchanger 37B are located above the temperature detector 59, and the positional relationship between the temperature detector 39F, the heat exchanger 37B, and the temperature detector 59 is the temperature detector 39, the heat exchanger 37, and the temperature detector 39A. It arrange | positions so that it may become the same as that of positional relationship.
The refrigerant circuit 96 improves the thermal efficiency of hot water generation by absorbing the heat of the medium-temperature water generated by the heating device 140 and generating hot water. The water circulation path 38B suppresses the mixing of the water cooled by the outside air and the hot water in the water storage tank 11F, which flows into the water storage tank 11F immediately after the hot water generator 131D is activated.

The cooling water heater 260 is operated in any one of the winter mode, the intermediate period mode, and the cooling mode similar to the cooling water heater 240. Transition between modes of the cooling water heater 260 is performed in the same manner as the cooling water heater 240.
When operating the refrigerant circuits 91, 92A, 95, and 96, the cooling water heater 260 operates the compressor 31 at a high speed operation, generates hot water, and operates the refrigerant circuit 94. When operating the refrigerant circuit 94, the compressor 31 is operated at a high speed. Drive and cool the building slightly.
(1) Operation in Winter Mode In the winter mode, an instruction to generate hot water is output when a predetermined hot water generation condition is satisfied and the temperature detected by the temperature detector 39F is lower than the first temperature.
(A) If the detected temperature of the operating temperature detector 59 is less than the second temperature when there is an instruction to generate hot water when not in cooling, the refrigerant circuit 91 is operated, and the detected temperature of the temperature detector 59 is the second temperature. In the above case, the refrigerant circuits 91 and 96 are simultaneously operated, and hot water is generated until the temperature detected by the temperature detector 39F becomes equal to or higher than the first temperature.
(B) Operation when there is a cooling instruction when hot water is not being generated Operation when a weak cooling operation is instructed:
When the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 94 is operated. When the temperature detected by the temperature detector 59 is equal to or higher than the fourth temperature, the drain valve 73 is opened and drained, and the refrigerant circuit 94 is operated after the temperature detected by the temperature detector 59 is lower than the fourth temperature.
Operation when instructing strong cooling operation:
When the temperature detected by the temperature detector 39F is lower than the first temperature and the temperature detected by the temperature detector 59 is lower than the fourth temperature, the refrigerant circuit 95 is operated. When the detected temperature of the temperature detector 39F is equal to or higher than the first temperature or the detected temperature of the temperature detector 59 is equal to or higher than the fourth temperature, the refrigerant circuit 95 is operated after the drain valve 73 is opened and drained.

(C) Operation when there is a cooling instruction during hot water generation Operation when a strong cooling operation is instructed:
The hot water generation operation is gradually shifted to the operation of the refrigerant circuit 95.
Operation in the case of instructions for weak cooling operation:
The hot water generation operation is gradually shifted to simultaneous operation of the refrigerant circuits 91 and 95 when the temperature detected by the temperature detector 59 is lower than the second temperature, and the temperature detected by the temperature detector 39A is equal to or higher than the second temperature. The refrigerant circuits 96 and 95 are gradually shifted to simultaneous operation.
The operation for producing hot water in the winter mode is the operation of the refrigerant circuit 91 or the simultaneous operation of the refrigerant circuits 91 and 96.
(D) Operation when there is an instruction to generate hot water during cooling Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 95:
The operation of the refrigerant circuit 95 is continued.
Operation when there is an instruction to generate hot water during operation of the refrigerant circuit 94:
The compressor 31 is shifted from the low speed operation to the high speed operation, and the operation of the refrigerant circuit 94 is shifted to the simultaneous operation of the refrigerant circuits 91 and 95 when the temperature detected by the temperature detector 59 is lower than the second temperature. When the detected temperature 59 is equal to or higher than the second temperature, the refrigerant circuits 96 and 95 are shifted to simultaneous operation.
(E) When there is an instruction for heating, the operation pumps 46 and 46A and the fan of the heat exchanger 44 are operated, and the room is heated. On the other hand, the water cooled by the heat exchanger 43 flows into the flow path 16B from the inlet 41, and medium temperature water is generated in the water storage tank 11F. In addition, since the medium temperature water generated by heating is changed to cold water by operating the refrigerant circuit 96 when hot water is generated, the thermal efficiency of the hot water generation of the cooling hot water supply device 260 is high even in the winter mode.
The operations in the (2) intermediate period mode and (3) cooling mode are the same as the operations of the cooling hot water supply apparatus 240. However, drainage is performed by opening the drain valve 73 instead of the drain valve 73A.

Therefore, the cooling water heater 260 effectively uses the capacity of the water storage tank 11 by changing the ratio of the volume for storing hot water generated by the instruction for generating hot water and the volume for storing exhaust heat of the cooling depending on the season. 11 sizes can be minimized. Further, the cooling water heater 260 shifts from the intermediate period mode to the cooling mode when there is drainage, and shifts from the cooling mode to the intermediate period mode when the exhaust heat amount of the cooling is less than a predetermined amount of heat. It can correspond to. Furthermore, since the cooling water heater 260 absorbs the heat of the medium temperature water and generates hot water, the generation of the hot water and the thermal efficiency of the cooling are high. The hot water is efficiently generated from the heated medium temperature water.
As mentioned above, although the example of embodiment was described in detail, they do not limit the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 11 Water tank, 12 Hot water inlet, 13 Water inlet, 14 Intermediate inlet, 15 Inlet, 16 Flow path, 17 Partition member, 18 Flow branch pipe, 19 Flow hole 21 Latent heat storage body, 22 Swirl pipe, 23 Coil, 24 Disperser, 25 Dispersion tube, 25B Connecting tube, 26 Disperser connection port, 26A Dispersion hole, 27 Dispersion plate, 28 Vertical tube, 29 Connection tube 31 Compressor, 32 Expander, 33 34 37 Heat exchanger, 35 Valve, 36 pump, 38 water circuit, 39 temperature detector 41 inlet, 43 44 heat exchanger, 46 pump, 47 heat medium circuit, 48 water circuit 51 compressor, 52 expander, 53 54 heat exchanger, 56 pump, 57 Heat medium circuit, 58 Water circuit, 59 Temperature detector 63 Solar collector, 64 Heat exchanger, 66 Pump, 67 Heat medium circuit, 68 Water circuit, 69 Temperature detector 71 Drain port, 7 Drain pipe, 73 drain valve, 75A gas-liquid separator, 75B injection circuit, 75C intermediate connection circuit, 76A heat exchanger, 76B accumulator, 77A gas-liquid separator, 77B ejector 83 heat source, 84 heat exchanger, 87 heat medium circulation Road, 89 Temperature detector 91-96 Refrigerant circuit 110 Water storage device, 130-132 Hot water generation device, 140 Heating device, 150 Cooling device, 160 Heat collection device, 170 Drainage device, 180 Hot water generation device
210-260 Air-conditioning water heater 310-340 Water heater

Claims (1)

A water tank filled with water,
A hot water generation water circulation path for taking out water in the lower part of the water tank and returning it to the upper part of the water tank;
A hot water generation heat exchanger that is arranged in the middle of the hot water generation water circulation path and performs heat exchange between water flowing in the water flow path and refrigerant flowing in the refrigerant flow path;
A first refrigerant circuit that forms a refrigeration cycle by circulating a refrigerant to a compressor that compresses the refrigerant, the hot water generating heat exchanger, a first expander that expands the refrigerant, and a heat transfer means that transfers heat to the refrigerant When,
The refrigerant is circulated through the compressor, the hot water generating heat exchanger, a second expander that expands the refrigerant, and heat absorption means that transmits heat of water below a predetermined position in the water storage tank to the refrigerant. A second refrigerant circuit forming a refrigeration cycle;
The compressor, heat radiating means for transferring the heat of the refrigerant to the water below the predetermined position, a third expander for expanding the refrigerant, and a building heat exchanging means for exchanging heat between the refrigerant and the air in the building A fourth refrigerant circuit for circulating a refrigerant to form a refrigeration cycle;
The refrigerant is circulated to the compressor, the hot water generating heat exchanger, the fourth expander or the first expander or the second expander or the third expander for expanding the refrigerant, and the building heat exchange means. A cooling water heater having a fifth refrigerant circuit that forms a refrigeration cycle.