JPS61101770A - 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] [Industrial Application Field] This invention is characterized in that when the air conditioning refrigeration cycle is heating, the water temperature on the heat collecting side is completely combed, and during cooling, the water temperature on the heat collecting side is set to a relatively low temperature. Backup function so that you can select it with the switch switch;

[Conventional technology]

An example of a conventional air heat pump water heater is shown in FIG. In Fig. 4, 1 is a compressor for hot water supply, 2 is a condenser for hot water supply, 3 is an expansion class barrel, and 4 is an evaporator equipped with a blower 5, and these are connected with a J/N refrigerant pipe to form a heat pump. The circuit consists of ()1.

The solid arrows indicate the flow of refrigerant.

In addition, 6 is a hot water storage tank, and this hot water storage tank is provided with a lower water supply lower part of the tank 6, and one water supply lower is provided with a pressure reducing check valve 9.
It is connected to the city water pipe 8 via.

A circulating water outlet 13 is provided at the lower part of the hot water storage tank 6, and this circulating water outlet 13 is connected to a circulation pump 15, a hot water supply condenser 2. and is connected to the upper part of the hot water storage tank 6 via a circulating water return port 14.

Further, an electric heater 16 is provided at the bottom of the hot water storage tank 16. The water temperature in the hot water storage tank 6 is detected by a thermostat 19, and a thermostat 2
0, a switching operation is performed from heat pump operation to heater operation.

FIG. 5 is a circuit diagram showing an example of the operation control circuit of each part in FIG. 4. In FIG. 4, one electrode of the AC power source E is connected to the hot water supply operation switch 18. It is connected to a movable contact of a thermostat 20 via the thermostat 19 described above.

The thermostat 20 has fixed contacts a and b, the fixed contact a is connected to the other electrode of the AC power source E via a heater circuit 21 corresponding to the heater 16, and the fixed contact of the thermostat 20 is connected to the hot water supply. Connected to the other electrode of the AC power supply E through a parallel circuit of a hot water supply compressor motor circuit 22 corresponding to the water compressor 1, a blower motor circuit 23 corresponding to the blower 5, and a pump motor circuit 24 corresponding to the circulation pump 15. has been done.

Next, the operation will be explained. First, hot water supply operation switch 1
8 is closed, thermostat 19 is closed, and thermostat 20 is connected to the fixed contact side as shown in FIG. The compressor motor circuit 22, the blower motor circuit 23, and the pump motor circuit 24 operate to perform heat pump operation.

As a result, the high-temperature, high-pressure refrigerant gas (Freon 12) discharged from the hot water supply compressor 1 is heat exchanged with the hot water supplied by the circulation pump 15 from the lower part of the hot water storage tank 6 in the hot water condenser 2, and the hot water is heated, condenses and liquefies itself, is depressurized by the expansion mechanism 3, takes heat from the air in the evaporator 4, is evaporated, and returns to the hot water supply compressor 1, forming a refrigeration cycle.

On the other hand, on the hot water side, city water pipe 8. Water is supplied from the water supply lower through the pressure reducing check valve 9.

The hot water filling the hot water storage tank 6 is sent from the circulating water outlet 18 to the hot water condenser 2 by the circulation 41 pump 15, heated, and passed through the circulating water return port 14 to the hot water storage tank 6.
It returns and is circulated.

In this way, the hot water in the hot water storage tank 6 is sequentially circulated and heated to raise its temperature. At this time, the inside of the hot water storage tank 6 has a uniform temperature distribution as the hot water is circulated.

When the temperature continues to rise in this way and the hot water in the hot water storage tank 6 reaches a predetermined temperature or higher, the movable contact of the thermostat 20 switches from the fixed contact side to the fixed contact a side, and the hot water supply compressor motor circuit 22 and the blower Up .

- motor circuit 23 and pump motor circuit 24 are stopped.

At the same time, the heater circuit 21 is activated and the heater 16)I!
! Powered up. When the hot water in the hot water storage tank 6 reaches a predetermined temperature +L, the thermostat 19 opens and the heater circuit 21
stops.

[Problem that the invention seeks to solve]

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 small.

In addition, when trying to obtain high-temperature hot water, the condensation pressure increases,
The compression ratio (=condensing 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, 130°C or more).
Since the reliability and lifespan of the hot water supply compressor 1 is seriously affected, measures have been taken to stop the operation of the hot water supply compressor 1 and, as an alternative, raise 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 increases in the winter when the outside temperature is low.

Therefore, the characteristics of the equipment and the load cannot be balanced,
When selecting a model, we needed equipment with a fairly large capacity.

This invention was made in order to solve such problems, and is a heat pump-type air-conditioning/heating hot-water supply system that enables efficient hot water dispensing without an auxiliary heat source device (for example, an electric heater), and also enables air-conditioning/heating. The purpose is to obtain an opportunity.

[Meaning @ Means to solve the imaginary]

A heat pump type air-conditioning/heating water heater according to the present invention has an air-heat α heat pump circuit and a water-source heat pump circuit's evaporators in thermal contact with each other, and is provided with an air-conditioning/heating changeover switch.

[For production]

In this invention, backup operation is controlled by selectively switching the air-conditioning refrigeration cycle to set the heat-collecting side water temperature to a high temperature using an air-conditioning/heating changeover switch during heating, and to set the heat-collecting side water temperature to a relatively low temperature during cooling.

〔Example〕

Embodiments of the heat pump type air-conditioning/heating/water heater of the present invention will be described below with reference to the drawings. Prior to describing the specific embodiments, first, a single-stage refrigeration cycle and a dual refrigeration system will be briefly described.

Normally, in a single-stage refrigeration cycle, when the difference between the condensing temperature and the evaporation temperature increases, especially when the hot water temperature increases, the performance coefficient M(C, 00P) of the refrigeration cycle deteriorates. This increases the compression ratio of the compressor.

This is because the volumetric efficiency decreases.

For example, in the case where the hot water temperature is 67℃ and the outside air is 0℃, there is a case of a single-stage compression air heat source heat pump chiller, and a dual cooling drl, that is, an air heat source heat pump chiller on the lower stage FLL+, and a water heat source heat pump water heater on the higher stage. Let's compare the volumetric efficiency of the compressor when the heat of condensation on the low stage side is taken as the amount of heat collected on the high stage side.

Figure 3 shows the relationship between the compression ratio and volumetric efficiency of a reciprocating compressor.
A Mollier diagram showing the operating characteristics of each method is also shown.

In the case of single-stage system (using Freon 22 refrigerant), high pressure 82 K
g/crIa b s low pressure 4 K9/ad a b s
The compression ratio is 8, and the volumetric efficiency is 42.

In the case of binary refrigeration system, low stage side (using refrigerant R-22), madder pressure 14 Kg/crl a b s, low pressure 4 Kz/f
fl a b s, compression ratio is 3.5, volumetric efficiency is 72
%, high stage side (using refrigerant Freon 12), high pressure 20 K9'
/cna b 8, low pressure 6, 6 h/crl a b
s, the compression ratio is 3, and the volumetric efficiency is 75%.

Based on these internal disbursement efficiencies, the theoretical heating C, O, and P seen from the respective Mollier diagrams are 3, 2 in the single stage system.
．． In the binary refrigeration system, 4 is compared to 9, and the binary refrigeration system is more efficient.

Next, an embodiment of a heat pump type air-conditioning/heating water heater according to the present invention will be described with reference to FIG. In this Figure 1,
The parts indicated by numerals 1 to 3.6 to 13 and 15.19 are the same as those in Fig. 4, and the other parts are newly added parts according to this invention, and are the parts that are characteristic of this invention. .

That is, 25 is a water side heat exchanger that shares the air conditioning refrigeration cycle and the water circuit to produce cold and hot water for air conditioning.

Reference numeral 26 denotes a 7-+ neemerator, which are successively connected through piping to form a water heat source heat pump circuit.

A crankcase heater 27 is attached to the hot water supply compressor l, and a crankcase heater 2 is attached to the accumulator 26.
8 is attached. The solid arrow indicates the flow of refrigerant 7 On the other hand, the air conditioning compressor 29. Four-way valve 30. Expansion mechanism 31.
An air-side heat exchanger 32 equipped with a blower 33 and the water-side heat exchanger 25 are connected by 1llQ order refrigerant piping to form an air 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.

In addition, the air conditioning circulation pump 34. A radiator 85 equipped with a three-way valve 36 and a water-side heat exchanger 25 are successively connected through water piping to form an air conditioning water circuit. The white arrows indicate the flow of cold and hot water.

Next, FIG. 2 shows an embodiment of the operation control circuit for each drawing machine shown in FIG. 1. In this) bird 2 diagram, J8 is a hot water supply operation switch, 191"iA@ is a thermostat that detects the water temperature in the hot water tank 6 and opens a contact when it reaches a predetermined temperature, and 22 is a hot water supply corresponding to the hot water compressor 1. 24 is a pump motor circuit corresponding to the circulation pump 15, 87 is a timer for controlling the operating time of gII,
38 is the output contact of the timer 37, 39 is the auxiliary relay, 40
al.

40a2 is an output contact of the auxiliary relay 39, 41 detects the temperature of hot water for air conditioning during heating operation, and closes when it exceeds a predetermined value;
a thermostat that controls the hot water supply compressor motor 22;
2 is an auxiliary relay, and 43 is an output contact of the auxiliary relay 42.

Further, 45 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, and 46 has a higher set value than the thermostat 45 and senses the water temperature of the air conditioning water circuit and controls the heating operation of the air conditioning water circuit. Thermostat, 47 is auxiliary relay, 48al, 48a2, 49bl
, 49b2 is an output contact of the auxiliary relay 47, 50 is a delay timer, and 51 is an output time limit contact of the slow study timer 50.

52 is an air conditioning operation switch, 53 is an auxiliary relay, and 5
4al, 54a2, 55.56 are output contacts of the auxiliary relay 53, and the auxiliary relay 57 has an output 58.

59 is an air conditioning/heating selector switch, 60 is an auxiliary relay,
Output connection A61 a], 61a2, 68C1゜63C2
have.

In addition, the antifreeze thermostat 64 is the same as the thermostat 4.
5.1: Detects the refrigerant temperature in the air conditioning refrigerant circuit with a low setting value, and is activated only during cooling operation.

The auxiliary relay 65 has an output contact 66.

67 is a pump motor circuit corresponding to the air conditioning circulation pump 34, and 68 is a thermostat that detects the temperature of the air conditioning cold water and controls the cooling operation, and has a higher set value than the thermostat 45.

A thermostat 69 detects the temperature of the air conditioning hot water and controls the heating operation, and has a higher set value than the thermostat 41. 70 is an air conditioning compressor motor circuit corresponding to the air conditioning compressor 29, 71 is a blower motor circuit corresponding to the blower 33, and 72 is a coil of the four-way valve 30.

Note that 27 and 28 are crankcase heaters shown in FIG. 1, and 59 is a heating/cooling changeover switch.

Next, the operation will be explained. First, hot water supply operation switch 1
8 is closed and the air conditioning operation switch 52 is in the OFF position, that is, the hot water storage heating operation mode will be described.

When the hot water storage heating operation period comes, the contact 38 is closed by the action of the timer 370. At this time, if the water temperature in the hot water storage tank 6 is below the predetermined water temperature, the thermostat 19 is closed, the auxiliary relay 39 is energized, the contact 40a1 is closed, and the pump motor circuit 24 is activated.

The auxiliary relay 65 is energized at the same time as the 4 sources are turned on, and the contact 6
6 is closed. In addition, the auxiliary relay 39 is energized and 14 points 41) a2 are closed, so that the auxiliary relay 53 is energized, and the contacts 54al and 54a2 are closed.
The contact 55 is open, the contact 56 is connected to the a side, and the contact 54a2 short-circuits the cooling antifreeze thermostat 64.

Also, since the contact point 55 is open, the air conditioning compressor motor circuit 70. The operation of the blower motor circuit 71 is controlled by contact 4.
Controlled by opening and closing of 8a1.

At this time, if the cooling/heating changeover switch 59 is connected to the warmer contact, the auxiliary relay 60 is energized.

Contacts 61al and 61a2 are closed contacts 63cl and 68c2
is connected to the a side, and the cooling antifreeze thermostat 64 is short-circuited at the contact 61a1.

When the contact 54a1 is closed, the auxiliary relay 57 is excited, the contact 58 is connected to the a side, and the air conditioning circulation pump motor circuit 67 is activated.

On the other hand, when the auxiliary relay 47 is de-energized, the contact 49bl is closed, the hot water supply compressor motor circuit 22 is operated, and the hot water storage heating operation is started, and the auxiliary relay 42 is energized and the contact 43 is closed. The crankcase heaters 27 and 28, which had been open until then when the hot water supply compressor motor circuit 22 was stopped, are now inactive. 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 15 in the hot water supply condenser 2, heats it, and condenses itself by heat radiation. The pressure is reduced by the expansion mechanism 3, and the water-side heat exchanger 25 exchanges heat with the dead cold water sent by the air conditioning circulation pump 34, cools it, collects heat, evaporates, and passes through the accumulator 26 to compress it for hot water supply. A refrigeration cycle is formed that returns to machine 1.

On the other hand, the hot water is supplied from the water supply lower through the city water pipe 8 and the pressure reducing check valve 9, and the hot water filling the hot water storage tank 6 is
The circulating water is sent from the circulating water outlet 13 to the hot water supply condenser 2 by the circulating pump 15, heated, and circulated back to the hot water storage tank 6 via the circulating water return port 14.

In this way, the water in the hot water storage tank 6 is sequentially circulated.
Item heating 1, temperature rising 1'', hot water supply (i11117
) For the refrigeration unit 71, the air conditioning water circuit of the heat source water circuit is sent to the water side heat exchanger 25 by the air conditioning circulation pump 34, cooled by the water side heat exchanger 25, and sent to the three-way valve 36.

When there is a conditioning load (1, 3-way valve 36.'), the radiator 35 is sent to the radiator 35 by L, and when there is no air conditioning load, the radiator 35 is switched to the radiator 35 by switching the 3-way valve 36. R pass and return to the air conditioning circulation pump 84.The air conditioner 9 load receives water side heat.
If the cooling capacity of the 9S converter 25 is exceeded, the water temperature in the air conditioning water circuit will drop rapidly, and when the heating/cooling selector switch 59 is connected to the warmer contact, the water temperature in the air conditioning water circuit will drop. When the water temperature reaches a predetermined level or lower due to the heat collection of the recycle, the thermostat 46 closes and the auxiliary relay 47. Delay timer 50 is excited.

When the air conditioning/heating selector switch 59 is connected to the cold side contact, the water sound in the conditioning water circuit 72 may drop below the predetermined water temperature due to the heat taken by the hot water supply ψ11 refrigeration cycle, and the thermostat 4
5 is closed, and the auxiliary relay 47. Delay timer 50 is excited.

In other words, in heating operation mode, thermostat 45
A circuit is formed by the thermostat 46 which has a higher setting value than that of the air conditioner, and a circuit is formed by the thermostat 45 which has a lower setting value in the cooling operation mode.

When the auxiliary relay 47 is energized, the contact 49bl is opened, the hot water supply compressor motor circuit 22 is stopped, and the hot water storage heating circuit is temporarily stopped. Additionally, the auxiliary relay 42 becomes de-energized, the contact 43 closes, and the crankcase heater 27.2
On the other hand, the contact 48a1 is closed, so that the air conditioning compressor motor circuit 70 and the blower motor circuit 71 are energized.
works. At this time, contact 48a2 is closed and contact 48a2 is closed.
9b2 is opened, the coil 72 of the four-way valve 30 is in the non-conducting state 11, and then the delay timer 5 is activated after a certain period of time.
0 contact 51 is closed, and the coil 72 of the four-way valve 80 is energized.

As a result, the air conditioning cold C east cycle performs cooling operation for a certain period of time, then enters heating operation, and then enters back-up heating operation of the heat source water of the supply A-side refrigeration cycle.

During cooling operation, the high-temperature, high-pressure refrigerant sent from the air conditioning compressor 29 is cut in the direction indicated by the broken arrow by the four-way valve 30, sent to the air-side heat exchanger 32, condensed, and then transferred to the expansion mechanism 3.
1′t? It is compressed, sent to the water side heat exchanger 25, and evaporated.
The air returns to the air conditioning compressor 29 via the four-way valve 80, forming a refrigerating cycle for air conditioning.

After a certain period of cooling operation, during backup heating operation, the four-way valve 30 is switched to transfer the high-temperature, high-pressure refrigerant gas sent from the air conditioning compressor 29 to the four-way valve 30 J11! '1 is sent in the direction indicated by the solid line arrow, and in the water side heat exchanger 25, it exchanges heat with the cold and hot water sent by the air conditioning circulation pump 34 and heats it.
It radiates heat and condenses itself, is depressurized by the expansion mechanism 31, takes heat and evaporates in the air side heat exchanger 32, and returns to the air conditioning pressure through the four-way valve 30 to the machine 29.

This backup heating operation causes the water temperature in the air conditioning water circuit to rise, and if the heating/cooling selector switch 59 is connected to the cold side contact, when the temperature rises to the point at which the thermostat 45 opens, the auxiliary relay 47 and delay timer 50 are activated. The excitation is removed, the contact 48a1 is opened, and the air conditioning pressure 11)1
．． The ζ motor circuit 70 and the blower motor circuit 71 stop operating, and the pull-up heating operation ends.

On the other hand, when the contact 49bl is closed, the hot water supply compressor motor circuit 22 is operated and the hot water storage heating operation is started again, the auxiliary relay 42 is energized, the contact 43 is opened, and the crankcase heater 27 and the crank If the case heater 28 is de-energized and the heating/cooling selector switch 59 is connected to the warmer contact, the thermostat 46 is turned off.
, When the water temperature in the air conditioning water circuit rises to It, the auxiliary relay 47 and the extension timer 50 are de-energized, and the contact 48a1
is opened, the air conditioning compressor motor circuit 70 and the blower motor circuit 71 stop operating, and the pack amplifier heating operation ends.

On the other hand, when the contact point 49bl is closed, the hot water supply compressor motor circuit 22 is operated and the hot water storage heating operation is started again, and the crankcase heater 27 and the crankcase heater 28 become inactive and idle.

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 19 is opened, or when the hot water storage heating operation period ends and the contact 38 is opened due to the operation of the timer 37, The auxiliary relay 39 is de-energized and the contacts 4C1al and 40a2 are opened.

When the contact 40al opens, the pump motor circuit 24
stops, hot water supply compressor motor circuit 22 stops, auxiliary relay 42 is de-energized, contacts 43 close, and crankcase heater 27. Crankcase heater 28 is energized.

On the other hand, by opening the contact 40a2, the auxiliary relay 58
The excitation of the auxiliary relay 57 is removed, contacts 54a1 and 54a2 are opened, the contact 56 is connected to the b side contact, and the contact 54al is opened, and the auxiliary relay 57 is deenergized and the contact 58 is connected to the b side contact.
It is connected to the side contact, the air conditioning circulation pump motor circuit 67 stops, and the hot water storage heating operation ends.

Next, when the hot water supply operation switch 18 is closed, the air conditioning operation switch 52 is connected to the inlet side contact, and the air conditioning/heating changeover switch 59 is connected to the B i:l'l contact,
In other words, a case will be described in which the hot water storage heating operation and the heating operation are performed simultaneously.

When the power is turned on, the auxiliary relay 65 is energized and the contacts 66 are closed. When the air conditioning operation switch 52 is connected to the inlet contact, the auxiliary relay 57 is energized and the contact 58 is set to a.
Connected to the side contact.

Moreover, when the air-conditioning/heating changeover switch 59 is connected to the warm-up contact, the auxiliary relay 60 is energized and the contact 61al is activated.

61a2 is closed, and contacts 6acl and 63c2 are connected to the a-side contact, respectively. By closing the contact 61al, the antifreeze thermostat 64 is short-circuited.

When the contact 58 connects to the 8-side disconnection point, the air conditioning circulation pump motor circuit 67 operates, and the auxiliary relay 53 is de-energized, so the contact 55 is closed and the contact 63C2
is connected to the A side contact, so when the cold/hot water in the air conditioning water circuit is below a predetermined water temperature, the thermostat 9 is closed and the air conditioning compressor motor circuit 7o and the blower motor circuit operate. .

Also, the contact 61a2 is closed, and the four-way valve 3° coil 7
2 is passed +4 and heating operation is performed. Compression f-2 for air conditioning
The high-temperature, high-pressure refrigerant gas that exits the air conditioner 9 is switched in the direction of the solid arrow by the four-way valve 30 and sent to the water-side heat exchanger 25, where it is sent to the water-side heat exchanger 25, where it is fed with cold and hot water for air conditioning sent from the air-conditioning circulation pump 34. It exchanges heat with and heats up, and it radiates heat and condenses itself, expanding mechanism 3.
The pressure is reduced at 1, and heat is collected from the atmosphere at the air side heat exchanger 32.
It evaporates and returns to the air conditioning compressor 29 via the four-way valve 30,
Form a refrigeration cycle.

The cold/hot water for air conditioning sent from the air conditioning circulation pump 34 is heated by the water side heat exchanger 25 and sent to the three-way valve 36, and if there is an air conditioning failure, the three-way valve 36 sends it to the radiator 85.
When there is no air conditioning load, the radiator 85 is bypassed and the flow returns to the air conditioning circulation pump 34.

When the cold and hot water in the air conditioning water circuit reaches a predetermined water temperature or higher, the thermostat 69 is opened and the air conditioning compressor motor circuit 7
0 and the blower motor circuit 71 stops, stopping the heating operation.

In this way, the heating operation is controlled by the thermostat 69.
I'll do it at When this heating operation is being performed, if the hot water storage heating operation is to be performed at the same time, the hot water supply operation switch 18
is closed, and when the hot water storage heating operation period begins, the contact 38 is closed by the operation of the timer 37, and when the hot water temperature in the hot water storage tank 6 is below a predetermined temperature, the thermostat 19 is closed and the auxiliary relay 39 is closed. is excited.

As a result, the contact 40al is closed and the pump motor circuit 24 is operated. Contact 49b1 closes, contact 63C
1 is connected to the a-side contact, and the contact 56 is connected to the b-side contact, and when the cold/hot water in the air conditioning water circuit is below a predetermined temperature, the thermostat 41 is opened, and the hot water supply compressor motor circuit 2
2 does not work.

In other words, the hot water storage heating operation is stopped, and if the cold/hot water in the air conditioning water circuit is at a temperature higher than Pjr, the thermostat 41 is turned off.
is closed, the hot water supply compressor motor circuit 22 operates, and hot water storage heating operation is performed.Also, when the hot water supply compressor motor circuit 22 is operating, the auxiliary relay 42 is energized, and the contact 48□I is turned on. The crankcase heater 27 and the crankcase heater 28 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 18 is closed, the air conditioning operation switch 52 is connected to the on point i) l'l =>, and the air conditioning changeover switch 59 is connected to the contact on the side of A case will be described in which hot water storage heating operation and cooling operation are performed simultaneously.

When the power is turned on, the auxiliary relay 65 is energized and the contacts 66 are closed. When the air conditioning operation switch 52 is connected to the inlet contact, the auxiliary relay 57 is energized and the contact 58 is connected to the a III contact.

Also, when the heating/cooling selector switch is connected to the cold side contact,
The excitation of the auxiliary relay 60 melts, and the contact 61a! ,61a2
is opened, and the contacts 63cl and 63c2 are connected to the b-side contact, respectively.

The air conditioning circulation pump motor circuit 67 operates when the contact 58 is connected to the a side contact, and since the auxiliary relay 58 is de-energized, the contact 55 is closed and the contact 63C2 is connected to the b side contact.
Since it is connected to the side contact, when the cold/hot water in the air conditioning water circuit has a temperature higher than the H1 constant and the thermostat 68 is closed, the air conditioning compressor motor circuit 70 and the blower motor circuit 71 operate. .

Also, the contact 61a2 is opened and the coil 7 of the four-way valve 80 is opened.
2 becomes de-energized and performs cooling operation.

The high-temperature, high-pressure refrigerant gas that exits the air conditioning compressor 29 is passed through the four-way valve 3.
At 0, the heat is switched in the direction of the dashed arrow, the air side heat exchanger 32 radiates heat to the atmosphere, the expansion mechanism 31 reduces the pressure, and the water side heat exchanger 25, where it is sent to the air conditioning circulation pump 34. It exchanges heat with the hot and cold water for air conditioning, cools it, collects heat, evaporates, and passes through the four-way valve 30 to the air conditioning pressure water 29.
Return to form a refrigeration cycle.

The hot and cold water for monitoring sent from the air conditioning circulation pump 34 is cooled by the water side heat exchanger 25 and sent to the three-way valve 36, and when there is an air conditioning load, the three-way valve 36 directs it to the radiator 35.
When there is no air conditioning load, the radiator 35 is bypassed and the flow returns to the air conditioning circulation pump 34.

When the cold and hot water in the air conditioning water circuit falls below a predetermined water temperature, the thermostat 68 is opened and the air conditioning compressor motor circuit 7
0 and feed) 4 (The machine motor circuit 71 stops and the cooling operation is stopped. In this way, the operation control of the cooling operation is performed by the thermostat 68.

When performing this cooling operation, if the hot water storage heating operation is to be performed at the same time, the hot water supply operation switch 18 is closed.
When the hot water storage heating operation period comes, the contact 38 is closed by the operation of the timer 87, and when the temperature of the hot water stored in the hot water storage tank 6 is below a predetermined temperature, the thermostat 19 is closed and the auxiliary relay 39 is energized. .

As a result, the contact 40al is closed and the pump motor circuit 24 is operated. When the contact 49b1 is closed, the contact 68C1 is connected to the b-side contact, and the hot water supply pressure m machine motor circuit 22 is operated to perform hot water storage heating operation.

During hot water storage heating operation, the auxiliary relay 42 is energized and the contact 43
is opened, the crankcase heater 27 and crankcase heater 28 are de-energized, the air conditioning load is small, the cooling operation is stopped when the thermostat 68 is opened, and the cold and hot water in the air conditioning water circuit is turned off due to the heat taken by the refrigeration cycle on the hot water supply side. If the temperature continues to drop, the air conditioning/heating selector switch 59 is connected to the cold side contact, so when the temperature of the cold/hot water in the air conditioning water circuit falls below the Par constant, the thermostat 45 closes, and the auxiliary relay 47 and delay are activated. Timer 50 is energized.

As a result, the contact 49b1 is opened, the hot water supply compressor motor circuit 22 is stopped, and the hot water storage heating operation is temporarily stopped. At the same time, the auxiliary valve 42 becomes de-energized, the contact 43 closes, and the power is applied to the crankcase heater 27 and the crankcase heater 28 by M%.

On the other hand, when the contact 48a1 is closed, the air conditioning compressor motor circuit 70 and the blower motor circuit 71 operate.

Further, the contact 48a2 is closed, the contact 49b2 is opened,
After the coil 72 of the four-way valve 30 is de-energized,
After a certain period of time, the contact 51 of the delay timer 50 is closed, and the coil 72 of the four-way valve 30 is energized.

As a result, the blank refrigeration cycle performs cooling operation for a certain period of time and then enters heating operation, that is, hot water supply disconnection (3tj cycle hot water backup heating operation).

As a result of this backup heating operation, the temperature of cold and hot water in the air conditioning water circuit rises to a temperature at which the thermostat 45 opens, the auxiliary relay 47 and the delay timer 50 are de-energized, the contact 48a2 is opened, and the coil 7 of the four-way valve 30 is opened.
2 is de-energized, the backup heating operation is completed, the contact 48al is opened, and the cooling operation is performed in which the operations of the air conditioning compressor motor circuit 70 and the blower motor circuit 71 are controlled by the thermostat 68.

In addition, the contact 49bl is closed, the hot water supply compressor motor circuit 22 is operated, and the hot water storage heating operation is started again, the auxiliary relay 42 is energized, the contact 43 is opened, and the crankcase heater 27 and the crankcase heater 28 becomes de-energized.

〔Effect of the invention〕

As explained above, this invention controls the backup heating operation performed by the air conditioning refrigeration cycle when the temperature of cold/hot water for air conditioning falls below a predetermined temperature due to heat collection of the refrigeration cycle for hot water supply during operation of the refrigeration cycle for hot water supply. By switching off the electric circuit using the air conditioning/heating selector switch, heating is performed by the air conditioning water circuit thermostat with a relatively high setting value, and cooling is performed with the air conditioning water circuit thermostat having a relatively low setting value. The temperature of the cold/hot water for air conditioning is controlled by the heat source of the refrigeration cycle for hot water supply according to the outside temperature, and the temperature of the cold/hot water for air conditioning from the heat source is controlled when the hot water supply load is large and the outside temperature is relatively low. Increasing the hot water supply capacity by increasing the temperature comparatively is OT function, and in the case of hot water supply 9 loads or relatively small and relatively cold operation with outside air 1 black, it is possible to increase the hot water supply capacity by increasing the hot water supply capacity. It is possible to keep the hot water supply capacity small by making the i-temperature relatively low. In other words, it enables the equipment to provide hot water supply power according to the hot water supply load, and -! It becomes possible to efficiently raise the temperature of the air conditioning compressor, which is a heat collection source, according to the cooling period and heating period.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing an embodiment of the heat pump type air-conditioning/heating/hot-water supply function of the present invention, Fig. 2 is an electric circuit diagram of an embodiment of the heat pump type air-conditioning/heating/hot-water supply (large scale) of the present invention, and Fig. 3 is a reciprocating system diagram. Diagram showing the relationship between compressor compression ratio and volumetric efficiency,
Figure 4 is a system diagram of a conventional air source heat pump type water heater, and Figure 5 is a conventional air source, v! FIG. 2 is an electrical circuit diagram of a heat pump water heater. 1... Compressor for hot water supply, 2... Condenser for hot water supply, 3.81... Expander (19, 6... Hot water storage tank. 15... Circulation pump, 25...Water side heat exchanger, 26...Accumulator, 27.28...
... Crankcase heater, 29 ... Compressor for air conditioning, 30 ... Four-way valve, 32 ... Air side heat exchanger, 34 ... Circulation pump for air conditioning , 35...
...Radiator, 36...-Three-way valve, 41, 45, 46
,68.69...Thermostat,50...
・Delay timer, 59...Heating/cooling selector switch, 7
2...Four-way valve coil. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa (and 2 others) Figure 6 Procedural amendment (voluntary) Display of case Wait (1985-59-224774 Title of invention Relationship with the case of person who amends a heat pump type air-conditioning/heating/water heater Patent application Address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama

Claims (1)

[Claims] A compressor, a hot water condenser, an expansion mechanism, and a water side heat exchanger that acts as an evaporator are sequentially connected to the refrigerant piping, and the water is distributed to the hot water condenser through a hot water refrigeration cycle and a hot water circulation pump. An air conditioner consisting of a hot water supply circuit that has a heat exchange relationship with the 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 through refrigerant piping. A refrigeration cycle for air conditioning and an air conditioning cold/hot water circuit that is distributed to the load side through the water side heat exchanger by an air conditioning circulation pump, and the water supply refrigeration cycle An air-conditioning refrigeration cycle is installed in a heat exchange relationship, and when the air-conditioning refrigeration cycle is in heating operation, when the air-conditioning refrigeration switch of the air-conditioning refrigeration cycle is on the cold side, the low-temperature thermostat of the air-conditioning water circuit Further, 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 when the temperature is on the warm side.