JPS60248967A - Heat pump type air-conditioning hot-water supply machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] This invention applies to heat pump water heaters.

[Prior art]

An example of a conventional air source heat pump water heater is shown in Fig. 1. In the figure, +1) is a compressor for hot water supply, (2) is a condenser for hot water supply, (3) is an expansion mechanism, (4 is an evaporator equipped with air blower 1 (5), and these are sequentially connected to the refrigerant. -C! to form a heat pump circuit.The solid arrow indicates the flow of the refrigerant.

(6) is the hot water storage tank, (7) is the water supply port installed at the bottom of the hot water storage tank (6), and is connected to the city water pipe (8) and the pressure reducing check valve (9).
) connected to the hot water storage tank (6) through
) - is a hot water supply port provided at the top of the hot water storage tank (6), which is connected to the hot water tap (B) via the hot water supply pipe αη.

(2) is the circulating water outlet provided at the bottom of the hot water storage tank (6), a< is the circulating water return port provided at the top of the hot water storage tank (6), (g) is the circulation pump, and vessel(
2) is connected with a water pipe. Ayu is an electric heater attached to the lower part of the hot water storage tank (6).

Next, FIG. 2 shows an example of an operation control circuit for each component shown in FIG. 1 above. In the figure, (g) is the hot water supply operation switch, (+1 is the thermostat that detects the water temperature within the hot water storage tank (6λ), (7) is the thermostat that switches from heat pump operation to heater operation, and Qp is the heater αQ
The heater circuit corresponds to the hot water supply compressor (2), the hot water compressor motor circuit corresponds to the hot water supply compressor (1), the rut corresponds to the blower motor circuit corresponding to the blower (5), and (c) corresponds to the circulation pump αQ. This is the pump motor circuit.

Next, the operation will be explained. First, the hot water supply operation switch (G) is closed, the thermostat O0 is closed, and the thermostat (A) is connected to the B contact side as shown in Figure 2. If the value is below a predetermined value, the hot water supply compressor motor circuit (2), the blower motor circuit (2), and the pump motor circuit operate to perform heat pump operation. High temperature and high pressure refrigerant gas (Freon 12)
In the hot water condenser (2), the hot water is heat exchanged with the hot water sent by the circulation pump (7) from the bottom of the hot water storage tank (6), and the hot water is heated. ) and then heated from the air in the evaporator (4).
It evaporates and returns to the hot water supply compressor (1), forming a refrigeration cycle. On the other hand, the hot water side is supplied from a water supply port (7) through a city water pipe (8) and a pressure reducing check valve (9). In addition, the hot water filling the hot water storage tank (6) is connected to the circulating water outlet (towards).
The circulating water is then sent to the hot water condenser (2) by the circulation pump (to) Iζ, heated, and passed through the circulating water return port a → to the hot water storage tank (6
) and then circulated. In this way, the hot water storage tank (6
The hot water in ) is circulated and heated in order to increase its temperature. At this time, the inside of the hot water storage tank (6) has a uniform temperature distribution due to the circulation of hot water. In this way, when the temperature continues to rise, when the hot water in the hot water storage tank (6) reaches a predetermined temperature or higher, the contact of the thermostat (A) switches from the B contact to the A contact, and the hot water supply compressor motor circuit (A) Blower motor circuit - and pump motor circuit (■) stop. At the same time, the heater circuit 0υ is activated and the heater σ is energized. When the hot water in the hot water storage tank (6) reaches a predetermined temperature, the thermostat 0 is opened and the heater circuit Cυ is stopped.

As mentioned above, conventional air source heat pump water heaters
It was configured. Therefore, in winter when the outside air temperature is low (for example, below 0° C.), the amount of heat extracted from the air is small, so the evaporation pressure is low and the hot water supply capacity is low. In addition, if you try to obtain high-temperature hot water, the condensation pressure will increase, and the compressor for hot water supply (1) will
The compression ratio (=condensation pressure/evaporation pressure) of the hot water supply compressor (1) is 8 or more, and the temperature of the refrigerant gas discharged from the hot water supply compressor (1) increases, for example, 180°C or more).Reliability and life of the hot water supply compressor (1) Since this has a large impact on water supply, the operation of the hot water supply compressor (+1) has been stopped, and as an alternative, measures have been taken such as raising the temperature using an auxiliary heat source (for example, an electric heater). However, this worsened the efficiency (coefficient of performance) of the equipment.

Furthermore, since it is an air source heat pump type, the hot water supply capacity is large when the outside temperature is high in the summer, and the hot water supply capacity is small when the outside temperature is low in the winter. This trend is completely opposite to the hot water supply load; the load is small in the summer when the outside temperature is high, and becomes large in the winter when the outside temperature is low. Therefore, the characteristics of the device and the load cannot be balanced, and when selecting a model, a device with a considerably large capacity is required.

[Summary of the invention]

This invention was made for the purpose of solving the above-mentioned drawbacks, and is configured so that the water-side heat exchanger of an air-source heat pump chiller and the evaporator of a water-source heat pump water heater are brought into thermal contact with each other, and The present invention proposes a heat pump type air-conditioning/heating water heater that can efficiently produce hot water at a high temperature without the need for an auxiliary heat source device (for example, an electric heater), and can also perform air-conditioning/heating.

[Embodiments of the invention]

Normally, in a single-stage refrigeration cycle, the coefficient of performance (c, o, p) of the refrigeration cycle deteriorates when the difference between the condensing temperature and the evaporation temperature increases, especially when the hot water temperature increases. This is because the compression ratio of the compressor increases and the volumetric efficiency decreases.

For example, when the hot water temperature is 67°C and the outside air is 0°C, in the case of a single-stage compression air heat source heat pump Teller,
Comparison of compressor performance efficiency when two-way refrigeration, that is, an air source heat pump chiller is installed on the lower stage side and a water source heat pump water heater is installed on the higher stage side, and the condensed heat on the lower stage side is used as the amount of heat collected on the higher stage side. I'll try it. FIG. 8 shows a Mollier diagram showing the relationship between the compression ratio and volumetric efficiency of a reciprocating compressor and the operating characteristics of each system. In case of single stage system (refrigerant Freon 22
), high pressure 82kq/da and S low pressure 4kg/daBs
The compression ratio is 8, and the volumetric efficiency is 42%. In the case of dual refrigeration system, low stage side (using refrigerant R-22), high pressure 14 kg
/cy4aIbs.

Low pressure 4kg/daubs, compression ratio 8.5, volumetric efficiency 72%, high stage side (using refrigerant 7 CI in 12), high pressure 20kg/ciabs.

The low pressure is 6.67 (βabs), the compression ratio is 8, and the volumetric efficiency is 75%.Based on these volumetric efficiencies, the theoretical heating C, O, and O seen from each Mollier diagram are as follows: 8.2, the binary refrigeration system exceeds 4, and the binary refrigeration system is more efficient.

An embodiment of the heat pump type air-conditioning/heating water heater according to the present invention is shown in FIG. In the figure, 1υ is the hot water supply compressor', (2
) is a condenser for hot water supply, (3) is an expansion mechanism, (c) is a water side heat exchanger that shares the water circuit with the refrigeration cycle for air conditioning to create cold and hot water for air conditioning, and (c) is an accumulator. They are connected via piping to form a water source heat pump circuit. 2) is the crankcase heater attached to the hot water supply compressor (1), and 2) is the tank case heater attached to the accumulator pan. And solid arrows indicate the flow of refrigerant.

(6) is a hot water storage tank, (7) is a hot water storage tank (6-inch lower ζ
City water pipe (8) and pressure reducing check valve i9 at the water supply port that was left behind.
) is connected to the hot water storage tank (6). +tC
) is the hot water supply port installed at the top of the hot water storage tank (6), through the hot water supply pipe αη.

and is connected to the hot water tap (2).

@ is the circulating water outlet provided at the bottom of the hot water storage tank (6), Q
4 is the circulating water outlet installed at the top of the hot water tank (6), (
A) is a circulation pump, and is connected to the hot water supply condenser (2) through a water pipe.

4 is an air conditioning compressor, (7) is a four-way valve, C3υ is an expansion mechanism, 2) is an air side heat exchanger equipped with a blower, and
(to the water side heat exchanger) are successively connected through refrigerant piping to form an air heat source heat pump circuit. The solid arrows indicate the flow of refrigerant during heating, and the dashed arrows indicate the flow of refrigerant during cooling.

(Foundation) is an air conditioning circulation pump, (ii) is a radiator equipped with a three-way valve (to), and these (and the water side heat exchanger) are sequentially connected with water piping to form an air conditioning water circuit. The white arrows indicate the flow of cold and hot water.

□ Next, FIG. 5 shows an embodiment of the operation control circuit for each component shown in FIG. 4 above. In the figure, (In) is the hot water supply operation switch, (In is the thermostat that detects the water temperature in the hot water storage tank (6) and opens the contact when it reaches a predetermined temperature, and (A) is the hot water supply corresponding to the hot water compressor fl). (c) is the pump motor circuit corresponding to the circulation pump (g), (b) is the timer that controls the operating time of the device, (b) is the output contact of the timer (b), (b) is the auxiliary The relays (40al) and (40a2) are the output contacts of the auxiliary relay (to), and θυ detects the temperature of hot water for air conditioning during heating operation, closes when it exceeds a predetermined value, and controls the hot water supply compressor motor). The function is an auxiliary relay, (foundation) is an auxiliary relay (42 output contacts, ■ is a thermostat that senses the outside temperature, ■ is a thermostat that senses the water temperature of the air conditioning water circuit and controls the heating operation of the air conditioning water circuit. , ni) is a thermostat which has a higher setting value than the thermostat) and senses the water temperature in the air conditioning water circuit and controls the heating operation of the air conditioning water circuit. Oη is the auxiliary relay, (48al) (48a2) (
49bl) (49b2) C auxiliary 'J' 17) (7) Output contact, the ring is the delay timer, i51ζ is the output time limit contact of the delay timer group, the signal is the air conditioning operation switch, the fence is the auxiliary relay, (
54al), (54a2), warm, ■ is the output contact of the auxiliary relay (to),! 57+ is the auxiliary relay, state is the output contact of the auxiliary relay, - is the bath heating changeover switch, state is the auxiliary relay, (61al), (61a2), (6
8C1) and C68C2) are the output contacts of the auxiliary relay, and the beak is the antifreeze thermostat that has a lower setting value than the thermostat and detects the refrigerant temperature in the air conditioning refrigerant circuit and only works during cooling operation.The beak is the auxiliary relay. Relay, river is the output contact of the auxiliary relay, (capital) is the pump motor circuit corresponding to the circulation pump for air conditioning, and so is the thermostat that detects the temperature of the cold water for air conditioning and controls the cooling operation. The setting value is higher. The thermostat detects the temperature of hot water for air conditioning and controls heating operation, and has a higher set value than the thermostat θυ. (lLll is the air conditioning compressor motor circuit corresponding to the air conditioning compressor, V is the blower motor circuit corresponding to the old blower, and (7 is the coil of the four-way valve).

Next, the operation will be explained.

First, the case where the hot water supply operation switch α barrel is closed and the air conditioning operation switch f5a is connected to the off side, that is, the hot water storage heating operation mode will be described.

When the hot water storage heating operation period comes, the contact (2) is closed by the action of the timer 06. At this time, hot water storage tank (6)
If the inside water temperature is below the specified temperature, the thermostat OI is closed, the auxiliary relay ■ is energized, and the contact (4oa1)
is closed, and the pump motor circuit cI4 is activated. When the power is turned on, the auxiliary relay (61) is energized and its contacts are closed. Also, the auxiliary relay (■) is energized and its contacts (40
When a2) is closed, auxiliary relay d is energized, contacts (54al) and (54a2) are closed, contact (2) is open, contact - is connected to side a, and contact (54a2) is closed.
The antifreeze thermostat for air conditioning (goods) is short-circuited.

In addition, since the contact point 48a is open, the operation control of the air conditioning compressor motor circuit and the blower motor circuit V1 is possible through the contact point 48a.
l) is controlled by opening and closing. At this time, if the cooling/heating changeover switch is connected to the call side contact, the auxiliary relay is energized, and the contacts (61al) and (61a2) are the closing contacts (68C1), and (68C2) are the contacts on the a side. It is connected to the antifreeze thermostat for cooling (61al).
goods) are short-circuited.

When the contact (54al) is closed, the auxiliary relay η is magnetized, the contact is connected to the a side, and the air conditioning circulation pump motor circuit is activated. On the other hand, when the auxiliary relay Q7) is de-energized, the contact (49bl) is closed, the hot water supply compressor motor circuit (2) is activated, and hot water storage heating operation is started, and the auxiliary relay (Q7) is energized. , the contact opens, and the crankcase heaters ① and ①, which had been energized until then while the hot water supply compressor motor circuit (2) was stopped, become de-energized. The high-temperature, high-pressure refrigerant sent from the hot water supply compressor (1) exchanges heat with the hot water supply water sent from the lower part of the hot water storage tank (6) by the circulation pump (7), It heats up, radiates heat, condenses, is depressurized by the expansion mechanism (3), exchanges heat with the cold water sent by the air conditioning circulation pump (in the water side heat exchanger), cools it, and collects heat. It evaporates, passes through the accumulator (c), and returns to the hot water supply compressor (1), forming a refrigeration cycle. On the other hand, the hot water is supplied from the water supply port (7) through the city water pipe (8) and the pressure reducing check valve (9), and the hot water supplied to the hot water storage tank (6) is circulated from the circulating water outlet @. The water is sent to the hot water supply condenser (2) by the pump αQ, heated, and circulated in the hot water storage tank (6) 9 through the circulating water return port σ.

In this way, the water in the hot water storage tank (6) is sequentially circulated and heated to raise its temperature. Also, for the refrigeration cycle on the hot water supply side, the air conditioning water circuit of the heat source water circuit is the air conditioning m-ring pump C →
is sent to the water side heat exchanger (A), and the water side heat exchanger (4
) and sent to the three-way valve (to).

When there is an air conditioning load, the air is sent to the radiator (to) by switching the three-way valve (2), and when there is no air conditioning load, the air is bypassed by the radiator (2) by switching the three-way valve (2), and the air is circulated for air conditioning.

Return to ring pump■. When the air conditioning load falls below the cooling capacity of the water side heat exchanger), the water temperature in the air conditioning water circuit gradually decreases. The thermostat that senses the outside temperature (
When the outside temperature is below the set temperature, it is connected to the a side contact, and when it is above the set temperature, it is connected to the b side contact. When the water temperature of the air conditioning water circuit becomes lower than the predetermined water temperature due to the heat taken by the refrigeration cycle on the hot water supply side while the thermostat ■ is connected to the contact on the A side, the thermostat closes and the auxiliary relay (B) is activated.

A delay timer is energized.

When the temperature of the water in the air conditioning water circuit drops below the predetermined water temperature due to the heat taken by the refrigeration cycle on the hot water supply side when the thermostat shaft is connected to the B side contact, the thermostat () closes and the delay timer is activated. is excited. In other words, when the outside temperature is low, a circuit is formed with thermostat ■, which has a higher setting value than thermostat ■, and when the outside temperature is high, a circuit is formed with thermostat ■, which has a lower setting value. When the auxiliary relay O't) is energized, the contact (49bl) is opened, the hot water supply compressor motor circuit) is stopped, and the hot water storage heating operation is temporarily stopped. Also, the auxiliary relay () becomes de-energized, the contact (good) closes, and the crankcase heater (b).

(Foundation) is energized. On the other hand, when the contact (48al) is closed, the air conditioning compressor motor circuit V1 and the blower motor circuit V1 operate. At this time, the contact (48a2) is closed,
When the contact (49b2) opens, the coil @ of the four-way valve becomes de-energized, and after a certain period of time, the contact (5) I of the delay timer closes, and the coil of the four-way valve (to) becomes de-energized. @
is energized. As a result, the air conditioning refrigeration cycle performs cooling operation for a certain period of time and then enters heating operation, that is, back-up heating operation of the heat source water of the hot water supply side refrigeration cycle. During cooling operation, the high-temperature, high-pressure refrigerant sent from the air conditioning compressor (2) is switched in the direction indicated by the dashed arrow by the four-way valve (7), sent to the air-side heat exchanger (2), and condensed, and then sent to the expansion mechanism O.
The pressure is reduced in step I), the water is sent to the water side heat exchanger (c), where it evaporates, passes through a four-way valve, and returns to the air conditioning compressor) to form an air conditioning refrigeration cycle. After a certain period of cooling operation, during backup heating operation, the air conditioning compressor is turned off by switching the four-way valve (7).
The high-temperature, high-pressure refrigerant gas sent through the four-way valve (7) is sent in the direction indicated by the solid arrow, and is exchanged with the cold and hot water sent by the air conditioning circulation pump (b) at the water side heat exchanger (c). It exchanges heat, heats up, radiates heat and condenses itself, is depressurized by the expansion mechanism c11), collects heat and evaporates in the air side heat exchanger (a), and then the four-way valve ■
Go back to the air conditioning compressor (2). This backup heating operation causes the water temperature in the air conditioning water circuit to rise, and when the temperature rises to a temperature that opens the thermostat (if the thermostat that senses the outside temperature is connected to the b-side contact), the auxiliary relay goes to zero and the delay timer starts. When the excitation is removed, the contact (48al) opens and the air conditioning compressor motor circuit ffl
Then, the blower motor circuit q power stops operating, the backup heating operation ends, and one contact (49BL) closes, and the hot water supply compressor motor circuit operates, and the hot water storage heating operation starts again. , the auxiliary relay (6) is energized, the contacts are opened, and the crankcase heater and crankcase heater are de-energized.

In addition, if the thermostat that senses the outside temperature is connected to the a side contact, when the water temperature in the air conditioning water circuit rises to the temperature at which the thermostat ) was opened, and the air conditioning compressor motor circuit Vω and the blower motor circuit (71
J stops, the backup heating operation ends, and one contact (49bl) closes, which causes the hot water supply compressor motor circuit (2) to operate and start the hot water storage heating operation again. ) and crankcase heater (2)
becomes de-energized. In this way, when the water temperature in the hot water storage tank (6) rises to a predetermined temperature or higher due to the hot water storage heating operation, and the thermostat aQ opens, or when the hot water storage heating operation period ends and the contact (to) opens due to the operation of the timer (b). , the excitation of the auxiliary relay ■ melts the contact (40al) (4
0a2) is developed.

When the contact (40al) opens, the pump motor circuit (good) stops, the hot water supply compressor motor circuit (2) stops, the auxiliary relay 4 is de-energized, and the contact (good) closes. When the crankcase heater (a) and the crankcase heater are energized and one contact (40a2) is opened, the auxiliary relay ■ is deenergized and the contact (54a1) (54a
2) is opened, the contact - is connected to the b side contact, and the contact (5
4at) is opened, the auxiliary relay φη is de-energized, the contact point - is connected to the b-side contact point, the air conditioning circulation pump motor circuit stops, and the hot water storage heating operation ends.

Next, when the hot water supply operation switch (G) is closed, the air conditioning operation switch Nawate is connected to the input side contact, and the air conditioning/heating changeover switch 4 is connected to the output side contact, that is, hot water storage heating operation and heating operation are switched on. The case where they are performed simultaneously will be explained. When the power is turned on, the auxiliary relay is energized and the contacts are closed. When the air conditioning operation switch (Incorporated) is connected to the input side contact, the auxiliary relay 15η is excited and the contact - is connected to the a side contact.

Also, when the heating/cooling selector switch ■ is connected to the call side contact,
The auxiliary relay is energized and the contacts (61al) (61a2)
is closed, and the contacts (68C1) and (68C2) are respectively a
Connected to the side contact. The antifreeze thermostat 141 is short-circuited by closing the contact (61a1.). When the contact To% is connected to the a side contact, the air conditioning circulation pump motor circuit operates, and since the auxiliary relay is de-energized, the contact is closed, and the contact (68C2) is connected to the a side contact. Since it is connected (when the cold and hot water in the air conditioning water circuit is below a predetermined water temperature, thermostat 4 is closed and the air conditioning compressor motor circuit, (Ill and blower motor circuit) are operated. Also, the contact (6112) When the coil is closed, the four-way valve coil (7 days) is energized and heating operation is performed.

The high-temperature, high-pressure refrigerant gas that exits the air conditioning compressor is passed through the four-way valve (
(to) is switched in the direction of the solid arrow and sent to the water side heat exchanger (e), where it exchanges heat with the cold/hot water for air conditioning sent from the air conditioning circulation pump ■, heating it, and condensing it by itself. death,
The pressure is reduced by the expansion mechanism 0, and heat is collected from the atmosphere by the air side heat exchanger), evaporated, and passed through the four-way valve (7) to the air conditioning compressor (
Return to 4) and form the refrigeration cycle. Cold and hot water for air conditioning sent from the air conditioning circulation pump 2 is sent to the water side heat exchanger (2)
When there is an air conditioning load, it is heated by the three-way valve (to) and sent to the radiator (2). When there is no air conditioning load, it is heated by the radiator (to) and sent to the radiator (to). Return to circulation pump ■. When the cold and hot water in the air conditioning water circuit reaches a predetermined water temperature, thermostat 4 is opened and the air conditioning compressor motor circuit and blower motor circuit (711) are stopped.
Stop heating operation. In this way, the heating operation is controlled by the thermostat. If hot water storage heating operation is to be performed at the same time as this heating operation, the hot water supply operation switch (c) is closed, and when the hot water storage heating operation period is reached, the contact (2) is closed by the operation of the timer (b). However, if the temperature of the hot water stored in the hot water storage tank (6) is below a predetermined temperature, the thermostat Q is closed and the auxiliary relay (2) is energized. This closes the contact (40al) and operates the pump motor circuit. When the contact (49bl) is closed, the contact (68C1) is connected to the a-side contact, and the contact (a) is connected to the b-side contact, the thermostat (ro ) is opened and the hot water supply compressor motor circuit (a) does not operate, that is, the hot water storage heating operation is stopped, and if the cold/hot water in the air conditioning water circuit is at a predetermined temperature or higher, the thermostat (b) closes and the hot water supply compressor motor circuit (a) does not operate. The compressor motor circuit (2) operates and performs hot water storage heating operation. In addition, when the hot water supply compressor motor circuit (a) is operating, the auxiliary relay is energized, the contacts are opened, and the crankcase heater and the crankcase heater are de-energized. In this way, hot water storage heating operation and heating operation are performed simultaneously.

Next, when the hot water supply operation switch (G) is closed, the air conditioning operation switch M is connected to the inlet side contact, and the cooling/heating / air conditioning selector switch 4 is connected to the cold side contact, that is, hot water storage heating operation and cooling operation are performed. A case where operations are performed at the same time will be explained. When the power is turned on, the auxiliary relay is energized and the contacts
is closed. When the air conditioning operation switch eel is connected to the input side contact, the auxiliary relay -η is energized and the contact ■ is connected to the a side contact. Also, when the air conditioning/heating selector switch is connected to the cold side contact, the auxiliary relay is de-energized and the contact (61al
X61a2) is opened, and contacts C68C1) (68C2) are connected to the b-side contacts, respectively. When the contact - connects to the A side contact, the air conditioning circulation pump motor circuit operates,
Since the auxiliary relay output is de-energized, the contact - is closed, and the contact (68C2) is connected to the b-side contact, so if the cold/hot water in the air conditioning water circuit is at a predetermined water temperature or higher, the thermostat will close. When it is closed, the air conditioning compressor motor circuit (71) and the blower motor circuit (2) operate. Also, the contact (61a2) is opened and coil 4 of the four-way valve (to) is de-energized, and cooling operation is started. Air conditioning compressor (2)
The high-temperature, high-pressure refrigerant gas that exits is switched in the direction of the dashed arrow by the four-way valve (to), radiates heat to the atmosphere by the air-side heat exchanger (to), is depressurized by the expansion mechanism 6), and is transferred to the water-side heat exchanger. It exchanges heat with the hot and cold air-conditioning water sent from the air-conditioning circulation pump (b), cools it, collects heat, evaporates, and passes through the four-way valve (to) for air-conditioning. It returns to the compressor (2) to form a refrigeration cycle. The cold and hot water for air conditioning sent from the air conditioning circulation pump ■ is cooled by the water side heat exchanger (c) and sent to the three-way valve (to), and when there is an air conditioning load, the three-way valve (to) sends it to the radiator ( 2), and if there is no air conditioning load, it bypasses the radiator (to) and returns to the air conditioning circulation pump (b). When the cold/hot water in the air conditioning water circuit falls below a predetermined water temperature, the thermostat 188) is opened, the air conditioning pressure l motor circuit T70) and the blower motor circuit are stopped, and the cooling operation is stopped. In this way, the cooling operation is controlled by the thermostat.

If you want to perform hot water storage heating operation at the same time as this cooling operation, the hot water supply operation switch (G) is closed.
When the hot water storage heating operation period begins, the timer (b) operates to close the contact, and when the hot water temperature in the hot water storage tank (6) is below a predetermined temperature, the thermostat a is closed and the auxiliary relay is activated. (2) is excited. This allows the contact (40
al) is closed, and the pump motor circuit (c) operates. When the contact (49bl) is closed, the contact (68C
1) is connected to the b-side contact, and the hot water supply compressor motor circuit (2) operates to perform stored hot water heating operation.

During hot water storage heating operation, the auxiliary relay () is energized, the contact - opens, and the crankcase heater @ and crankcase heater (E) are de-energized. When the air conditioning load is low and the cooling operation is stopped due to opening of the thermostat, and the temperature of cold and hot water in the air conditioning water circuit continues to drop due to heat collection from the refrigeration cycle on the hot water supply side, the thermostat detects the outside temperature.
is connected to the b-side contact, and when the temperature of cold and hot water in the air conditioning water circuit falls below a predetermined temperature, the thermostat) closes and the auxiliary relay @η and delay timer are energized. As a result, the contact point (49bl) opens and the hot water supply compressor motor circuit (2
) stops, and the hot water storage heating operation temporarily stops. At the same time, auxiliary relay 4 becomes de-energized, contacts close, and crankcase heater (2) and crankcase heater (2)
is energized. On the other hand, when the contact (48al) is closed, the air conditioning compressor motor circuit (71) and the blower motor circuit (
2) works. In addition, the contact (48a2) is closed, the contact (49b2) is closed, the coil (7) of the four-way valve (G) is de-energized, and after a certain period of time, the contact 15υ of the delay timer ring is closed. The coil (72) of the west push button is energized.This causes the air conditioning refrigeration cycle to run for a certain period of time.
After the cooling operation, the heating operation, that is, the backup heating operation of the heat source water of the refrigeration cycle on the feeder side is started.

As a result of this backup heating operation, the temperature of the hot and cold water in the air conditioning water circuit rises to a temperature at which the thermostat opens, the auxiliary relay C and the delay timer are deenergized, the contact (48a2) opens, and the four-way valve (7 ) coil (
72 is de-energized, the backup heating operation and 9th rotation are completed, the contact (48al) is opened, and the operation of the air conditioning compressor motor circuit 'ff01 and the blower motor circuit (7υ) is controlled by the thermostat decoy. Also, the contact (49bl) closes, the hot water supply compressor motor circuit (a) operates, and the hot water storage heating operation starts again.The auxiliary relays θ are energized, the contact opens, and the crank The case heater (b) and crankcase heater (b) become de-energized.

〔Effect of the invention〕

As explained above, in this invention, when the cold/hot water temperature for air conditioning falls below a predetermined temperature due to the heat collection of the refrigeration cycle for hot water supply during operation of the refrigeration cycle for hot water supply, the backup performed by the refrigeration cycle for air conditioning controls the heating operation. When the outside temperature is low, the thermostat in the air conditioning water circuit has a relatively high setting value, and when the outside temperature is high, the thermostat in the air conditioning water circuit has a relatively low setting value. By switching the electric circuit, the temperature of the cold/hot water for air conditioning, which is the heat source of the refrigeration cycle for hot water supply, is controlled according to the outside temperature, and when the outside temperature is relatively low and the hot water supply load is large, the cold temperature of the cold water for air conditioning, which is the heat source of the heat collection, is controlled by switching the electric circuit. It is possible to raise the water temperature relatively high to increase the capacity, and when the hot water supply load is small and the outside temperature is relatively high, the hot water temperature for air conditioning of the heat collection source can be relatively lowered to increase the hot water supply capacity. This made it possible to keep it small. In other words, the equipment can provide hot water supply capacity according to the hot water supply load,
It also makes it possible to efficiently raise the temperature of the cold/hot water for air conditioning, which is the heat source, according to the outside temperature.

[Brief explanation of drawings]

Figure 1 is a system diagram of an air source heat pump type power supply system showing a conventional example, Figure 2 is an electric circuit diagram of a conventional example, Figure 8 is a diagram showing the relationship between compression ratio and volumetric efficiency of a reciprocating compressor, 4
The figure shows a system diagram showing one embodiment of the heat pump type air-conditioning/heating water heater of the present invention, and FIG. 5 shows an electric circuit diagram of one embodiment of the present invention. In the figure, (υ is the compressor for hot water supply, (2) is the condenser for hot water supply, (3) is the expansion mechanism, (6) is the hot water storage tank, aθ is the circulation pump, ) is the water side heat exchanger, and the pen is the accumulator. ,
(Foundation) is a crankcase heater, (Support) is a crankcase heater, (N) is an air conditioning compressor, (G) is a four-way valve, 0]
) is the expansion mechanism, (2) is the air side heat exchanger, (2) is the air conditioning circulation pump, (2) is the radiator, (2) is the three-way valve, (B) is the thermostat, θ4 is the thermostat, (C) is the thermostat, ) is the thermostat, ■ is the delay timer, groan is the thermostat, - is the thermostat, and the bottle is the coil. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] The hot water is distributed to the hot water condenser through a hot water refrigeration cycle and a hot water circulation pump, which are constructed by sequentially connecting a compressor, a hot water condenser, an expansion mechanism, and a water side heat exchanger that acts as an evaporator with refrigerant piping. An air conditioner consisting of a hot water supply circuit that has a heat exchange relationship with hot water in a hot water storage tank, a compressor, a four-way valve, a heat exchanger on the non-use side, an expansion mechanism, and a heat exchanger on the water side, which are sequentially connected with refrigerant piping. The water-side heat exchanger is equipped with an air-conditioning cold/hot water circuit that is circulated through the water-side heat exchanger to the load side by the air-conditioning refrigeration cycle and the air-conditioning circulation pump. An air conditioning refrigeration cycle is installed in the exchange relationship, and the outside air temperature is detected during heating operation of the air conditioning refrigeration cycle, and if the outside air temperature is above a predetermined value, the low temperature thermostat of the air conditioning water circuit detects whether the air temperature is below the predetermined value or not. A heat pump type air-conditioning/heating water heater, characterized in that the operation of the air-conditioning refrigeration cycle is controlled by a high-temperature thermostat of the air-conditioning water circuit.