JPS61223463A - 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] The present invention provides a heating, cooling, and hot water supply system in which water in a hot water storage tank can be heated using a heat pump.
) Concerning a pump device, it is possible to manually or automatically switch between a hot water heating operation priority mode and an air conditioning operation priority mode, and the priority mode can be automatically switched between daytime and nighttime. It is.

[Prior Art] Conventionally, there has been a heating and cooling system using a heat pump as shown in FIG. In the figure, 1 is a compressor, 2 is a four-way valve for switching between air conditioning and heating, 3m is an indoor heat exchanger, and 3b is an indoor heat exchanger.
4 is a reversible refrigerant expansion mechanism, which is composed of P and W pipes 4m and 4b corresponding to the flow direction during cooling and heating.

5 is an outdoor heat exchanger, and t-6a and 6b are electromagnetic valves provided on the four-way valve 2 connection side of the indoor heat exchangers 3m and 3b.

In the conventional heat pump device configured as described above, when cooling multiple rooms, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 flows as shown by the solid line arrow in Fig. 6 and exits the room from the four-way valve 2. Heat exchange @15 to 9, where it is cooled and condensed. The condensed high-pressure liquid refrigerant is then transferred to the expansion tube 4
The pressure is reduced by passing through a. At this time, indoor heat exchange 93a
, 3b, two-way solenoid valves 8m, 6b open when a load is generated, so that the low-pressure liquid refrigerant from the expansion tube 4a evaporates in the indoor heat exchanger 93m, 3b, absorbing heat from the indoor air and gasifying it. This low pressure refrigerant gas passes through the four-way valve 2 and compressor 1
The cycle of being sucked in, compressed again, and exhaled is repeated 9 times.
returned. During heating operation, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 (flows as indicated by the broken line arrow in Fig. 6 and enters the four-way valve 2 for indoor heat exchange 113m, 3b).
Here, the heat is radiated and condensed to heat the inside of the proboscis chamber. The condensed high-pressure liquid refrigerant is further depressurized by passing through the expansion pipe 4b, and this low-pressure liquid refrigerant reaches the outdoor heat exchanger 5, where it is heated by the outside air and evaporated. The evaporated low-pressure gas passes through the four-way valve 2, is sucked into the compressor 1, is compressed again and discharged, and the cycle is repeated.

FIG. 7 shows an example of a conventional heating/cooling/hot water supply heat pump device, and the same reference numerals as in FIG. 7 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 thereof, and this heating coil 8 is connected in parallel to a series circuit of an indoor heat exchanger 3a and an electromagnetic fp6m via a solenoid valve 6b. . 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 heat pump device configured as described above, when heating hot water, the solenoid valve 6a is closed and the solenoid valve 6b is closed.
open. As a result, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 flows as indicated by the broken line arrow in Fig. 7, passes from the four-way valve 2 through the solenoid valve 6b, and reaches the heating coil 8, where it radiates heat and condenses. By doing so, the water in the hot water tank 6 is heated. The condensed high-temperature, high-pressure liquid refrigerant is depressurized as it passes through the expansion tube 4b, reaches the outdoor heat exchange I#5, is heated by the outside air, and evaporates. Then, this low pressure gas is sucked into the compressor 1 through the four-way valve 2 and is compressed again, repeating the cycle to heat the hot water.

Also, during heating operation, the solenoid valve 6a is open and solenoid valve 6b is closed, and during cooling operation, fffa! Heating or cooling is performed by opening the valve 6b and closing the solenoid valve 6a to generate a flow of refrigerant as shown by the broken line arrow or the solid line arrow in FIG. 7, and its operation is described in FIG. It is the same as the one above.

[Problem to be Solved by the Invention 3] 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 method heats the water in the hot water tank by attaching the heating coil (B) to the hot water tank and heating the refrigerant circuit, which enables economical operation such as recovering waste heat from cooling and heating hot water. I can't. 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 guides the high temperature and high pressure refrigerant from the compressor to the heating coil in the hot water storage tank through the switching valve. , a circuit system that heats the water in the hot water storage tank and returns the condensed refrigerant to the compressor, and is also equipped with an inverter to control the capacity of the compressor, and an air conditioner (hereinafter referred to as air conditioning).
The hot water storage tank is heated separately in the operation priority mode and the hot water heating operation priority mode, and is equipped with a timer-equipped control device that determines and controls the maximum frequency of the inverter according to each operation mode.

In this invention, the hot water tank is heated by directing high temperature, high pressure refrigerant from the compressor to the heating coil of the hot water tank using a switching valve such as a three-way valve, and a control device with a timer is used to control air conditioning at night. In operation priority mode, when the temperature at the bottom of the hot water storage tank is below the set value, the temperature at the bottom of the hot water storage tank is lower than the set value, during times other than during air conditioning operation, and in the hot water heating operation priority mode, such as during the day, the temperature at the bottom of the hot water tank is higher than the set value. By heating each hot water tank until it reaches It is something.

〔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/hot-water supply heat pump device according to the present invention. The same reference numerals as in FIGS. This is a three-way valve for switching flow paths, and its inlet port a is connected to the discharge side of the compressor 1, and one discharge port (b) of the three-way valve 11 is connected to the four-way valve 2. Further, 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 a separate solenoid valve 1.
It is connected to both ends of the double tensioner wI4 via wires 2 and 13. 14 is an inverter for controlling the capacity of the compressor 1; 15 is the three-way valve 11. Equipped with a timer that controls the solenoid valves 12 and 13 and the inverter 14 *Jm device with a timer! ! A detection signal from a detector 16 that detects the lower water temperature of the hot water storage tank 7 is input to the I control device 15. Then, from the timer-equipped WiJ control device 15, the three-way valve 11. Control signals are supplied to the electromagnetic fp12.13 and the inverter 14.

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

(a) During heating, the high temperature and high pressure refrigerant discharged from the compressor 1 is transferred to the three-way valve 11.
The inflow and discharge bow) from a and b to one or both of the indoor heat exchangers M3 a and 3b via the broken line path of the four-way valve 2, where it is condensed, then depressurized by the expansion mechanism 4, and further The refrigerant gas is evaporated in the outdoor heat exchanger 5 and returns to the compressor 1 through the four-way valve 2.

(b) During cooling In this case, the refrigerant discharged from the compressor 1 is
1 Inflow and discharge bow) From a and b, the air flows through the solid line path of the four-way valve 2 to the outdoor heat exchanger 5, where it exchanges heat with the outside air and condenses, and is further depressurized by the expansion mechanism 4. , reaches one or both of the indoor heat exchangers 3a and 3b, and evaporates. This evaporated gas refrigerant returns to the compressor 1 via the west valve 2.

(C) During cooling hot water supply In this case, the refrigerant discharged from the compressor 1 is
1 inflow and discharge port) a, b to hot water tank heating coil 8
9, where it condenses, thereby heating the water in the hot water storage tank 7. The condensed liquid refrigerant then passes through the solenoid valve 13 and reaches the expansion mechanism 4, where it is depressurized and then transferred to the indoor heat exchangers 3a and 3.
b, where it absorbs indoor heat and evaporates, and this gas refrigerant returns to the compressor 1 via the solid line of the four-way valve 2. As shown in Part B, hot water supply and heating will be performed at the same time as cooling.

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

The above describes the flow of refrigerant during each operation, but
For heating agents, 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 depending on the weather (from 5 p.m. to 3 p.m.), and a third peak from evening to night (from 5 p.m. to 11 p.m.). After 24:00, the load disappears.

Figure 3 shows the inverter operating frequency f and hot water heating capacity Qd.
FIG. 4 is a diagram showing the relationship between the two, and control in the case of the present invention will be explained with reference to the operation flowchart of FIG. In addition,
The control procedure program shown in FIG. 4 is stored in the internal memory (not shown) of the fvJrm device 15.

In FIG. 4, first, in step S1, it is determined whether the operation mode of the heat pump device is manual or automatic. In the case of automatic mode, the process goes to step S2, and a time pair for night air conditioning operation priority mode is set. Next, if the time is within the set time period of the night air conditioning operation priority mode, the process goes to step S4 and the air conditioning operation priority mode is entered. Subsequent step S9
This will be explained with reference to FIG.

If the time is within the time period set for the daytime hot water supply operation priority mode, the process goes to step S5 and the hot water supply operation priority mode is entered.

Furthermore, if manual operation is selected in step S1,
Depending on the mode selection in step S6, the air conditioning operation priority mode in step S7 or the hot water heating operation priority mode in step S8 is selected.

Next, the contents of step S9 will be explained with reference to FIG. 3 depending on the operating condition of S9 after entering each mode in Figure 4.
There are two cases. The temperature at the bottom of the hot water tank is lower than the set value.
If no air conditioning load is being generated, the process goes to step 811, where the inverter frequency is set to the lowest and hot water heating operation is performed efficiently.

Next, when the lower temperature of the hot water storage tank is higher than the set value and an air conditioning load is occurring, the process goes to step 812, where the frequency of the inverter is set to a frequency commensurate with the load, and air conditioning operation is performed.

Furthermore, when the lower temperature of the hot water storage tank is lower than the set value and an air conditioning load is occurring, the process goes to step 313, where the frequency of the inverter is set to the highest frequency and priority mode operation is performed.

9. As mentioned above, in this embodiment, the priority mode can be selected either manually or automatically, so that the user's request can be quickly met. In addition, in the case of automatic mode, the night time period can be set, and since it is equipped with a timer control device that sets the inverter frequency according to each operation mode, it can quickly respond to air conditioning loads and By being able to heat the hot water storage tank according to the time of occurrence, it is possible to operate with less heat loss.

In addition, in this invention, although the said Example demonstrated the case where there were two indoor heat exchangers, this can be similarly applied to the case where there are three or more heat exchangers. Further, the switching valve of the present invention may be a combination of two two-way valves instead of the three-way valve 11 of the above embodiment, or the three-way valve 11 may be an electrically operated valve capable of adjusting the flow rate.

〔Example〕

As explained above, according to the present invention, when the timer-equipped control device is in the air conditioning operation priority mode such as at night and the temperature at the lower part of the hot water tank is less than the set value, hot water is stored at times other than during air conditioning operation. In addition, in the hot water heating operation priority mode such as during the daytime, the hot water storage tank is heated until the lower temperature of the hot water tank falls below the set value, and the optimum frequency of the inverter is adjusted according to the operating conditions. Therefore, the capacity of the compressor is controlled.
The hot water storage tank can be heated appropriately according to the time period when the load occurs, resulting in economical operation with less heat loss.

[Brief explanation of the drawing]

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 and 5 are diagrams showing the operation control flow of the cooling/heating/hot water supply heat pump device and the inverter control flow in the present invention, and FIG. 6 is a configuration diagram showing the conventional cooling/heating heat pump device. Figure 7 is a configuration diagram showing the same conventional heat pump device for heating, cooling, and hot water supply. 1... Compressor, 2... Four-way valve, 3m, 3b...
Indoor heat exchanger, 4... Expansion mechanism, 5... Outdoor heat exchanger, 7... Hot water storage tank, 11... Three-way valve (switching valve), 8...
...Heating coil, 12.13...Solenoid valve, 14...
Inverter, 15...Control device with timer, 16...
・Detection of water temperature 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) Fig. 2 8th layer Cll1F engraved] No. 6, 1 line g4pr$kh Gld ("'!'A-) No. 4
1!0

Claims (5)

[Claims] (1) A compressor whose capacity can be controlled by an inverter, a four-way air-conditioning/heating switching valve, an indoor heat exchanger, a 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. a solenoid valve that switches the heating coil to both ends of the expansion mechanism, and a solenoid valve that switches the heating coil to both ends of the expansion mechanism; and a solenoid valve that switches the heating coil to both ends of the expansion mechanism; The hot water storage tank is heated during the specified time period, and in the case of the hot water heating operation priority mode, the hot water storage tank is heated until the lower temperature of the hot water tank reaches the set value or higher, and the optimum frequency of the above inverter is determined according to each operation mode. An air conditioning/hot water supply heat pump device characterized by comprising a control device with a timer for controlling. (2) The air conditioning/hot water supply heat pump device according to claim 1, wherein the timer-equipped control device allows manual selection between an air conditioning operation priority mode and a hot water supply heating operation priority mode. (3) The timer-equipped control device can automatically select a hot water heating operation priority mode during the day and an air conditioning operation priority mode at night. heat pump equipment. (4) The heating/cooling/hot water heating pump device according to claim 3, wherein the timer-equipped control device is capable of manually setting the operating time period for the night air conditioning operation priority mode. (5) A control device with a timer sets the inverter frequency to the highest frequency when hot water supply heating operation and air conditioning operation are requested at the same time, and sets the inverter frequency to the lowest frequency when only hot water supply heating operation is requested. and furthermore, when only air conditioning operation is required, the operation is controlled at an inverter frequency that matches the air conditioning load. The air conditioning/hot water heat pump equipment described.