JPS61235658A - Air-conditioning and hot-water supply heat pump device - 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] The present invention relates to an air-conditioning/hot-water supply heat pump device that uses a heat pump to heat water in a hot-water storage tank. This is related to a heating/cooling system, hot water heater), and bongo equipment that performs switching time control during simultaneous operation at a certain set value operating ratio. There is a cooling/heating JJ3 device using a pump as shown in Figure 5 (17). In the figure, 1 is a compressor, 2 is a four-way valve for switching between air conditioning and heating, :(n, 3h is an indoor heat exchanger, 4 is is a ji7 reverse type refrigerant expansion mechanism, cooling,
It is composed of expansion pipes 4a and 4h corresponding to the direction of flow force during heating. 5 (It is an outdoor #4 exchanger, and it is 8a
, [lh is L distribution indoor heat exchanger 3a, 3h four-way valve 2
This is a solenoid valve installed on the connection side.

In the conventional heat pump device configured as described above, when cooling multiple rooms, the high temperature and high pressure refrigerant gas discharged from the compressor 1 flows as shown by the solid line arrow in FIG. The high-pressure liquid refrigerant reaches the outdoor heat exchanger 5, where it is cooled and condensed. , 3b's two-way filNi valves 6a and Rh open when a load occurs, and the low-pressure liquid refrigerant from the expansion tube 48 is evaporated in the indoor heat exchangers 3a and 3h (7), which removes heat from the indoor air. This low-pressure refrigerant gas passes through the four-way valve 2, is sucked into the compressor 1, is compressed again, and the cycle is repeated.

In addition, during heating operation, the high temperature and high pressure refrigerant gas discharged from the compressor 1 111 flows as shown by the broken line arrow in Fig. 5 and reaches the indoor heat exchangers 3a and 3b from the four-way valve 2, where the heat is radiated. It then condenses and heats the room. The condensed high-pressure liquid refrigerant 1 is further depressurized by passing through the expansion tube 4b, and this low-pressure liquid refrigerant reaches the outdoor heat exchanger M5.
Evaporates when heated by outside air. The evaporated low pressure gas passes through the four-way valve 2, is sucked into the pressure IIPi machine 1, is compressed again and discharged, and the cycle is repeated.

FIG. 6 shows an example of a conventional heating/cooling/hot water supply heat pump device, and the same reference numerals as in FIG. 5 indicate the same or corresponding parts. Further, 7 is a hot water storage tank, and a hot water storage tank heating coil is provided inside the tank, and this heating coil 8 is connected in parallel to the series circuit of the indoor heat exchanger 3a and the solenoid valve 6a via a solenoid valve 6b. There is. 9 is the city water intake of hot water tank 6, 10
is a hot water supply faucet connected to the hot water storage tank 7.

In the above heat pump device configured as 1,
When heating hot water, close the solenoid valve 6a and close the solenoid valve 6a.
Open h. As a result, the high-temperature, high-pressure refrigerant gas discharged from the pressure Mll flows as shown by the broken line arrow in FIG.
Here, the water in the hot water storage tank 6 is heated by radiating heat and condensing it. The condensed high-temperature, high-pressure liquid refrigerant is depressurized as it passes through the expansion tube 4h, reaches the outdoor heat exchanger 5, is heated by the outside air, and evaporates. Then, this low pressure gas passes through the four-way valve 2, is sucked into the pressure 148 machine 1, and is compressed again, repeating the cycle to heat the hot water.

Also, during heating operation, the solenoid valve 6a is opened, and the solenoid valve 1-6 is opened.
b is closed, and further during cooling operation (here, the solenoid valve 6h is opened, and the tt! solenoid valve 6a is closed, causing the flow of refrigerant shown by the broken line arrow or solid line arrow in Fig. 6, thereby heating. Or it performs air conditioning, and its operation is the same as that described in FIG.

[Problem to be Solved by the Invention 1] As mentioned above, when hot water is heated by a conventional heat pump device, one of the indoor heat exchangers 3a and 3b is replaced with a heating coil as shown in FIG. This heating coil is attached to the hot water tank and the water in the hot water tank is heated by heating the refrigerant circuit, which enables economical operation such as recovering waste heat from cooling to heat hot water. Can not. Furthermore, since it does not have an inverter, there are operational problems due to the inability to control the rotational speed of the compressor.

This invention attempts to solve the problems of the conventional ones as described above, and aims to provide an economical air-conditioning/heating/hot-water supply heat pump device.

[Means for solving problems]

The air conditioning/hot water supply heat pump device according to the present invention is provided with a switching valve such as a three-way valve on the discharge side of the compressor, and the high temperature and high pressure refrigerant from the pressure #i machine is transferred to the heating coil in the hot water storage tank through the switching valve. The system uses a circuit system that heats the water in the hot water storage tank and returns the condensed refrigerant to the compressor, and also uses an inverter to control the capacity of the compressor, as well as an air conditioning (hereinafter referred to as air conditioning) load and hot water heating at the same time. The system is equipped with a control device with a timer that controls the air conditioning operation and the hot water supply operation at an operating ratio of a certain set value at the time of 1t11.

[For production]

In this invention, the control device with a timer allows the air conditioning operation and the hot water heating operation to be shifted by 1 full time with a certain set value when the air conditioning load and hot water heating occur simultaneously (7). This allows for economical operation at low frequencies without any problems.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

Fig. 1 shows a configuration diagram of an air conditioning/heating/hot water heating/pump device according to the present invention, and the same reference numerals as in Figs. The inlet port a is connected to the discharge side of the compressor 811, and one discharge port lb of the three-way valve 11 is connected to the four-way valve 2. The other discharge boat C of the three-way valve 11 is connected to one end of the heating coil 8, and the other end of the heating coil 8 is connected to both ends of the expansion mechanism 4 via separate electromagnetic valves 12 and 13. 14 is an inverter for capacity control of the compressor 1;
15” - Groundbreaking method 11. This is a control device with a timer that controls the solenoid valves 12 and 13 and the pumper 14, and a detection signal from a detector 16 that detects the water temperature in the lower part of the hot water tank 7 is input to the control device 15 with the timer. There is.

Then, from the timer control device 15, the three-way valve 11 is
．． Control signals are supplied to the solenoid valves 12 and 13 and the inverter 14.

Next, the operation of this embodiment configured as described above will be explained.

(a) The high-temperature, high-pressure refrigerant discharged from the lffl compressor is
The inflow and discharge boats a and b pass through the meridian indicated by the broken line arrow of the four-way valve 2 to one side (and both sides) of the indoor heat exchangers 3a and 3h, where they are condensed and then decompressed by the expansion mechanism 4. The refrigerant gas is then evaporated in the outdoor heat exchanger 5, and this evaporated refrigerant gas passes through the four-way valve 2 and returns to the compressor 1.

(h) During cooling In this case, 1, the refrigerant l discharged from the compressor 1 flows through the three-way valve 11 and the discharge boat, and passes from h to the four-way valve 2 through the route indicated by the solid line arrow, and then to the outdoor heat exchanger 5. There, the air exchanges heat with the outside air and condenses. After being further depressurized by the expansion mechanism 4, it reaches one or both of the indoor heat exchangers 3a and 3b and evaporates.

This evaporated gas refrigerant passes through the four-way valve 2 (7) and returns to the compressor 1 again.

(c) During cooling hot water supply In this case, the refrigerant discharged from the compressor 1 reaches the hot water storage tank heating coil 8 through the inflow and discharge boats a and h of the three-way valve 11, where it condenses and then The water in the hot water tank 7 is heated. The compressed liquid refrigerant then passes through the electromagnetic valve J3, reaches the expansion mechanism 4, is depressurized, and then reaches one or both of the indoor heat exchangers 3a and 3b, where it absorbs indoor heat and evaporates. , this gas refrigerant returns to the compressor 1 via the solid line arrow of the four-way valve 2. By doing this, hot water supply and heating will be done at the same time as air conditioning.

(d) When heating hot water In this case, the refrigerant discharged from the compressor 1 (well, it reaches the hot water tank heating coil 8 from the inflow and discharge ports 1-a, b of the three-way valve 11, and condenses with The water in the hot water storage tank 7 is heated.Then, the condensed liquid refrigerant passes from the solenoid valve 12 through the expansion mechanism 4 to the outdoor heat exchanger 5, where it evaporates.The evaporated gas refrigerant passes through the four-way valve 2. and returns to compressor 1 again.

The above describes the flow of refrigerant during each operation, but
During the heating season, heating is usually given top priority and heating operation is performed according to the heating load.

Generally speaking, the heating load of a house has its first peak between 6:00 and 9:00 in the morning, and then during the day (12:00), as shown in Figure 2.
There is a second peak from 5:00 to 5:00 p.m. depending on the weather, and a third peak from evening to night (from 5:00 p.m. to 11:00 p.m.). After 24:00, the load disappears.

FIG. 3 is a diagram showing the relationship between the operating frequency of the inverter and the hot water heating capacity, and the control in the case of the present invention will be explained with reference to the operation 70-chart in FIG. 4. It should be noted that the gorogram of the control procedure shown in FIG. 4 is stored in the internal memory of the control device.

In Fig. 4, first, in step S1, if the air conditioning load cannot be covered by the set ratio of (air conditioning load/heat I/pump capacity) even at the maximum inverter frequency, the system goes to Sukko/Tsubu S2 regardless of the set ratio. Performs air conditioning priority operation. For example, when the setting ratio of (air conditioning load/heat pump capacity) is 80% and the air conditioning load is 7000 keal/h, the heat pump capacity is 7000/0. l'l-8750kcal/h
It becomes necessary. If this is done, the inverter frequency will be 9 from Figure 3.
Even 011z does not have enough capacity, so the inverter frequency is 9
01 [z, operate at 8000kcal/h, prioritize 7000keal/h of air conditioning load 17 remaining 100
Hot water heating operation is performed at 0kcal/h. At this time, the ratio of hot water heating operation and air conditioning operation is 1000: 7000 =
1:7, so we are driving on a time-sharing basis.

Next, if it is determined that it can be covered by step S1, go to step S3, and if the set ratio of (air conditioning load/heat pump capacity) is too high for the air conditioning load even at the minimum inverter frequency, go to step S4. air conditioning priority operation at the minimum inverter frequency. For example, when the setting ratio of (air conditioning load/heat pump capacity) is 80% and the air conditioning load is 1000 kcal/h, the heat pump capacity is 10%.
00/O,l'i= 1250kcal/h is required. This is because, as shown in Figure 3, even the inverter frequency is 30H2, this is an excessive capacity, so the inverter frequency is 30H2,
Operates at 2000kcal/h, 100% of air conditioning load
Prioritize 0kcal/h and the remaining 1000kcal/h
Hot water heating operation is performed at h. At this time, the ratio of rapid heating operation and air conditioning operation is 1000:1000=1. : 1 and is operating on a time-sharing basis.

Furthermore, step 31. If the above operation mode is not entered in step S3, the inverter frequency is controlled to the set ratio in step S5. For example, when the setting ratio of (air conditioning load/heat pump capacity) is 80% and the air conditioning load is 4000 kcal/h, the heat pump capacity is 4000/0.8 = 5000 kcal/h.
It becomes necessary. From Figure 3, this means that the inverter frequency is 5.
Since the capacity is 0112, the water supply heating operation and air conditioning operation are time-divided at this frequency with the ratio of 0.2:0.8=1:4.

Note that the above explanation was based on an example where the air conditioning load is a heating load, but in the case of a cooling load, hot water heating is performed using cooling waste heat, so the amount of hot water heating differs as a result, but the air conditioning load There is no change in the control method based on .

As mentioned above, in this embodiment, when air conditioning operation and hot water heating operation occur at the same time, the air conditioning operation and hot water heating operation are time-controlled to the operating ratio of a certain set value.
It is possible to economically operate the compressor at a low frequency without increasing the frequency of the inverter that controls the amount of consumption of the compressor. In addition, when the operating ratio at the set value cannot be maintained, the empty 1g priority operation is performed, so that the user's request can be met.

In the above embodiment, the case where there are two indoor heat exchangers has been described, but the same can be applied to the case where there are three or more indoor heat exchangers. Further, instead of the three-way valve 11, a combination of two two-way valves may be used, or the three-way valve 11 may be an electrically operated valve that can adjust the flow rate.

〔Effect of the invention〕

As explained above, according to the present invention, when the air conditioning load and the hot water heating operation occur simultaneously, the timer-equipped control device can time-control the air conditioning operation and the hot water heating operation using a certain set value. The effect of economical operation at a low frequency can be obtained without increasing the frequency too much.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of the air conditioning/hot water supply heat pump device according to the present invention, Fig. 2 is a pattern diagram of heating load generation in a general house, and Fig. 3 is a diagram showing the relationship between inverter frequency and rated heating capacity in the present invention. 4 is a diagram showing the operation control flow of the heat pump device for air conditioning and hot water supply in the present invention, FIG. 5 is a block diagram showing a conventional heat pump device for air conditioning, and FIG. 6 is a diagram showing the same FIG. 1 is a configuration diagram showing a hot water supply heat pump device. 1 Compressor, 2. Four-way valve, 3a, 3b... Indoor heat exchanger, 4 Expansion mechanism, 5 Outdoor heat exchanger, 7 Hot water storage tank, 1
1 Three-way valve (switching valve), 8 ・Heating coil, 1.2,1
g - Solenoid valve, 14 - Inverter, 15 Control device with timer, 16 Water temperature detector at the bottom of the hot water tank. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa (2 others) Fang 2 Figure 0 1y 72 B
2ψ (〃Chi agent J tusk 3 Fig.1>8-7ff1l MiIRCHz3 ku:=x;=) gu:=×;=> Procedural amendment (voluntary) October 1, 1985 1. Indication of case Patent application 1986-77032 No. 2, Title of the invention Air-conditioning/hot water heat pump device 3, Relationship to the amended case Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo 5.11111 Correct subject matter (1) Detailed explanation of the invention in the specification Section for amendments 111 Specification, page 12, line 14, ``Surge heating'' There is
"Hot water heating" is corrected.

Claims (3)

[Claims] (1) Compressor whose capacity can be controlled by an inverter, four-way air conditioning/heating switching valve, indoor heat exchanger, reversible flow expansion mechanism,
In an air conditioning/hot water heat pump device in which a refrigerant circuit is configured by connecting an outdoor heat exchanger in a closed loop, the refrigerant flow path provided between the compressor and the four-way valve and discharged from the compressor is connected to the heating coil in the hot water storage tank. and a solenoid valve that switches and connects the heating coil to both ends of the expansion mechanism, and when air conditioning load and hot water heating occur simultaneously, air conditioning operation and hot water heating operation are operated at a set value. 1. A heat pump device for heating, cooling, and hot water supply, characterized by comprising a control device with a timer for time control. (2) When the air conditioning load increases and the operating ratio of air conditioning operation and hot water heating operation cannot be maintained at a certain set value even when the inverter frequency is at its maximum, the control device with a timer will set the operating ratio. The cooling/heating/hot water heating system according to claim 1 is capable of disabling the inverter to operate at the maximum frequency while covering the air conditioning load, and performing hot water heating operation in the remaining time. pump equipment. (3) When the air conditioning load decreases and the operating ratio of air conditioning operation and hot water heating operation cannot be maintained at a certain set value even when the inverter frequency is at its minimum, the control device with a timer will set the operating ratio. The heating/cooling system according to claim 1 or 2, which is capable of covering the air conditioning load while operating the inverter at the minimum frequency and heating and supplying hot water in the remaining time. Hot water heat pump equipment.