JPS6361571B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an operation switching device for switching between heating operation and hot water supply operation in a heat pump type heating and water heater. Conventionally, heat pump type heating and water heaters have been known that are capable of switching between heating operation and hot water supply operation, so that either heating operation or hot water supply operation can be selected as appropriate and operated independently (for example, the
(Refer to Publication No. 89963, etc.) Note that simultaneous operation of heating operation and hot water supply operation is not carried out because it will result in overload operation. In the above-described conventional system, if a user forgets to switch from heating operation to hot water supply operation, a certain amount of hot water supply operation time is not ensured, resulting in a shortage of hot water storage. The present invention has been made in view of the above points, and
Normally, in a typical household, out of 24 hours a day,
There are always times when heating is not required.
In addition, we focused on the fact that in ordinary households, the heating hours during which heating operations are performed do not change much throughout the winter, and that even during heating operation hours, there are times when the room becomes warmer and heating operations are not required. The 24-hour day is programmed to be divided into heating time and hot water supply time, and if heating operation and hot water supply operation are requested at the same time, heating operation will be performed during heating time, and hot water supply time during hot water supply time. If it is in the zone, the hot water supply operation will be performed automatically, and
Even during heating hours, if the room is warm and heating operation is not required, hot water supply operation is enabled, and even during hot water supply hours, heating operation is enabled when the water temperature in the hot water tank is high and hot water supply operation is not required. By doing so, the purpose is to prevent a shortage of hot water storage by ensuring a constant hot water supply operation time while enabling heating operation when heating is required. In order to achieve this object, the present invention, as shown in _FIG . A hot water supply operation command signal generating means 12 that detects that the water temperature in the tank is below a predetermined temperature _T2 and generates a hot water supply operation command signal B.
The program timer means 30 is programmed to distinguish heating time periods and hot water supply time periods with 24 hours as one cycle, and outputs a heating time period signal C during the heating time period and a hot water supply time period signal D during the hot water supply time period.
When the heating time period signal C is output from the program timer means 30, at least when the heating operation command signal A from the heating operation command signal generation means 11 is being received, the heating operation signal E is output from the hot water supply operation command signal generation means 12. When only the hot water supply operation command signal B is received, the hot water supply operation signal F is output, while when the hot water supply time period signal D is input, at least when the hot water supply operation command signal B of the hot water supply operation command signal generation means 12 is received, the hot water supply operation is performed. A discriminating means 40 outputs a heating operation signal E when only the heating operation command signal A from the heating operation command signal generating means 11 is received, and a refrigerant circuit is activated in response to the heating operation signal E from the discriminating means 40. The switching control means 50 switches to the heating operation cycle while receiving the hot water supply operation signal F and switches to the hot water supply operation cycle. When the heating operation command signal A is received, the determination means 40 outputs the heating operation signal E, and the switching control means 50 switches the refrigerant circuit to the heating operation cycle, while the hot water supply operation command signal from the hot water supply operation command signal generation means 12 is output. When only B is received, the determination means 40 outputs the hot water supply operation signal F, and the switching control means 50 switches the refrigerant circuit to the hot water supply operation cycle. When receiving the hot water supply operation command signal B from the operation command signal generation means 12, the determination means 40 outputs the hot water supply operation signal F, and the switching control means 50 switches the refrigerant circuit to the hot water supply operation cycle, while generating the heating operation command signal. When only the heating operation command signal A from the means 11 is received, the determining means 40 outputs the heating operation signal E, and the switching control means 50 switches the refrigerant circuit to the heating operation cycle. Embodiments of the present invention will be described in detail below with reference to the drawings. Figure 2 shows the refrigerant circuit of a heat pump type air-conditioning/heating water heater. 1 is a compressor, 2 is an air conditioning load side heat exchanger installed indoors, 3 is a heat source side heat exchanger, 4 is a hot water storage tank, and 5 is a A hot water supply load side heat exchanger for heating the stored water in the hot water storage tank 4, 6 and 7 are expansion valves, SV ₁ -
SV ₅ is a four-way switching valve and solenoid valve installed between each of the above devices. During cooling operation, the refrigerant circulation system is switched to the cooling operation cycle shown by the solid arrow in the figure to cool the room, while during heating operation At times, the system switches to the heating operation cycle shown by the dashed line arrow in the figure to heat the room, and during the hot water supply operation, it switches to the hot water supply cycle shown by the dashed-dotted line arrow in the figure to heat the water stored in the hot water storage tank 4, and during the cooling hot water supply operation, it heats the room. Switching to the cooling hot water supply operation cycle shown by the two-dot chain arrow in the figure, the room is cooled and at the same time the water stored in the hot water storage tank 4 is heated. Next, FIG. 3 shows an operation switching circuit for switching the operating state of the air-conditioning/heating water heater shown in FIG. 2 to four states: cooling, heating, hot water supply, and cooling hot water supply. In Fig. 3, 8 is an operation switch, 9 is a heating operation switch, and 9 is closed when the room temperature is below a predetermined temperature T ₁ during cooling operation;
A room temperature control thermostat that closes when the room temperature is above a predetermined temperature _T2 , _X1 is a relay that turns ON when the operation switch 8 and room temperature control thermostat 9 are closed, and _X2 is a relay that turns ON when the relay _X1 turns ON. The compressor relay is turned on when the normally open contact _X1-1 is closed, 10 is a cold/warm selector switch, and _X3 is a compressor relay that is turned ON when the normally open contact X1-1 is closed. This is a cooling relay that operates ON. Also, X _2-1 is the relay for the compressor mentioned above.
X ₂ normally open contact, X _3-1 is the switching contact of the cooling relay X ₃ , and 11 is the normally open contact of the compressor relay X _2.
When X _2-1 is closed and switching contact of cooling relay X ₃
X _{3 - 1 is} a heating operation command signal generating means that emits a heating operation command signal A to the OFF side position; It is. next,
Before explaining the rest of FIG. 3, for convenience, a hot water supply operation command signal generating means that detects that the hot water temperature in the hot water storage tank 4 is below a predetermined temperature _T2 and generates a hot water supply operation command signal B will be explained. FIG. 4 shows the hot water supply operation command signal generating means 12, and in FIG. The water temperature sensor 16 is a water temperature setting device for setting the boiling temperature of hot water, and the numeral 17 is the water temperature sensor 15 and the water temperature setting device 16.
The comparison voltage value obtained with is compared with the reference voltage value set by resistors R ₁ and R ₂ , and the actual water temperature is
The output is “L” when the temperature is lower than the set temperature _T2 of 6.
The level comparator Tr ₁ is a transistor that turns off when the comparator 17 outputs "L". Further, 20 is a manual hot water supply switch, which has a power terminal 20a and a grounded terminal.
OFF side terminal 20b and open ON side terminal 20
It has c. Furthermore, 21 is a first inverter that outputs "H" when the power supply terminal 20a of the hot water supply switch 20 is connected to the ON side terminal 20c, and 22 is the "H" output of the first inverter 21.
The second inverter, _X5 , which outputs "L" when the first transistor _Tr1 turns OFF at the time of output, is a hot water supply relay that turns ON when the second inverter 22 outputs "L". Then, hot water switch 2
If the hot water temperature in the hot water storage tank 4 is lower than the set hot water temperature _T2 of the hot water temperature setting device 16 with the power supply terminal 20a of the power supply terminal 20a connected to the ON side terminal 20c, the comparator 1
7 and the accompanying OFF operation of the first transistor Tr ₁ causes the second inverter 22 to output an "L" output, turning on the hot water supply relay X ₅ and issuing the hot water supply operation command signal B. There is. Next, the remainder of FIG. 3 will be explained. _X5-1
is the normally open contact of the hot water supply relay _X5 , and 25 is the second
The heating switching circuit switches the refrigerant circulation system to the heating operation cycle by switching and opening/closing the solenoid valves SV ₁ to SV ₅ in the figure, 26 is the cooling switching circuit that similarly switches to the cooling operation cycle, and 27 is the hot water supply circuit that switches to the hot water supply operation cycle. A switching circuit 28 is a cooling hot water supply switching circuit that switches to a cooling hot water supply operation cycle. Also,
X ₆ is a relay that turns ON when the hot water supply switching circuit 27 is activated, X _6-1 is a switching contact of relay X ₆ , and X _4-1
and X _4-2 are the normally open contact and normally closed contact _{of the heating relay X 4 ,} and when the normally open contact X _4-1 of _the heating relay
When X _6-1 is in the OFF position, the heating switching circuit 25 is activated and the normally closed contact of the heating relay X ₄ is activated.
When X _4-2 is closed, the normally open contact of hot water supply relay X ₅
The hot water supply switching circuit 27 is configured to operate when X _5-1 is closed. In FIG. 3, numeral 30 is a program timer means which is important in the structure of the present invention, and the program timer means 30 has a 24-hour cycle, and the heating time period and the hot water supply time period are appropriately distinguished by the operator. Contact 30 is programmed separately and
a, and the contact 30a is opened during the heating period to output the heating period signal C, while the contact 30a is closed during the hot water supply period and the hot water supply period signal D is output. Further, X ₇ is a relay that is turned on when the contact 30a of the program timer means 30 is closed, and X _7-1 is a normally open contact of the relay X ₇ ,
Connected in parallel to the normally closed contact X _4-2 of the heating relay X ₄ . Therefore, the program timer means 3
When the heating time zone signal C is output by opening _{the contact 30a of 0 (that is, when the normally open contact X 7-1 is} in the open state due to the OFF operation of the relay If command signal A is output, the heating relay
The ON operation of X ₄ opens its normally closed contact X _4-2 to prevent the hot water supply switching circuit 27 from starting to operate, and also closes the normally open contact X _4-1 of heating relay X ₄ and closes relay X _6. By switching the switching contact X _6-1 to the OFF side, a heating operation signal E is generated and output to the heating switching circuit 25. On the other hand, the normally open contact X _5-1 of the hot water supply relay X ₅ of the hot water operation command signal generation means 12 is generated. If only the hot water supply operation command signal B is output due to the closing of the
A hot water supply operation signal F is generated by the closed state of the normally closed contact X _{4 - 2} of the heating relay X ₄ and is output to the hot water supply switching circuit 27 . Conversely, when the hot water supply time period signal D is output by closing the contact 30a of the program timer means 30 (that is, when the normally open contact _X7-1 is closed due to the ON operation of _the relay If hot water supply operation command signal B is output due to the _closing of normally open _contact X _{5-1 of} relay F is generated and output to the hot water supply switching circuit 27, and when relay X _{6 is} turned on, its switching contact When only the heating operation command signal A from the means 11 is output, heating relay X ₄ is turned ON to close its normally open contact X _4-1 , and switching contact X _6-1 of relay X ₆ is turned OFF. Heating operation signal E by side switching
A determining means 40 is configured to generate and output the generated signal to the heating switching circuit 25. Further, the four switching circuits 25 to 28 actuate the heating switching circuit 25 in response to the heating operation signal E from the discriminating means 40 to switch the refrigerant circuit to the heating operation cycle, while the hot water supply switching circuit 27 operates in response to the hot water supply operation signal F. switching control means 50 configured to switch the refrigerant circuit to the hot water supply operation cycle by activating the
It consists of The program timer means 30 includes:
A manual heating operation priority switch 55 that opens the contact 30a in priority to the program and outputs the heating operation priority signal G, and a contact 30a in priority to the program.
A manual hot water supply operation priority switch 56 is provided which closes the switch A and outputs a hot water supply operation priority signal H. In addition, X ₈ in Figure 3 is the normally open contact of the hot water supply relay X ₅ .
A relay that operates ON when hot water supply operation command signal B is generated by closing X _5-1 , X _8-1 is a switching contact of said relay X ₈ , and common terminal X _8-1 c is a cooling relay X ₃
The ON side terminal is connected to the cooling/hot water supply switching circuit 28, and the OFF _side terminal is connected to the cooling switching circuit 26. Also,
X ₉ is a relay that turns ON when the air conditioning/hot water switching circuit 28 is activated, and X _9-1 is a normally closed contact of the relay X _9-1 , which prevents the hot water switching circuit 27 from operating when it is opened. . Furthermore, X ₁₀ is a heating relay
A relay that operates ON when the normally open contact X _4-1 of X ₄ is closed, and X _10-1 is the normally closed contact of the relay X ₁₀ ,
It is interposed between the ON side of switching contact X _6-1 of relay X ₆ and the normally open contact X _7-1 of relay X ₇ . Also,
In FIG. 4, PC indicates when the normally open contact X 2-1 of the compressor relay X ₂ of the heating operation command signal generating means ₁₁ is closed and when the switching contact X _3-1 of the cooling relay X ₃ is in the ON side position. The photocoupler _Tr2 , which is powered and activated, is a transistor that turns ON when the photocoupler PC is activated, and forcibly sets the output of the first inverter 21 to the "H" level. Next, the operation of the above embodiment will be explained with reference to the table below. At present, the cold/warm selector switch 10 is in the heating side position, the hot water supply switch 20 is in the ON side position 20c, and the operation switch 8 is closed. In this state, if it is heating time,
The program timer means 30 opens the contact 30a and outputs the heating time period signal C. Therefore, when relay X ₇ is in the OFF operating state, its normally open contact
Remains open to X _7-1 . Now, when the room temperature is below the predetermined temperature _T1 , the heating operation command signal A is output from the heating operation command signal generating means 11 (that is, the switching contact _of the cooling relay When the normally open contact X _2-1 of the compressor relay X ₂ closes due to the closing of the room temperature thermostat 9 when X _3-1 is in the OFF side), the heating relay X ₄ is activated and normally closed. Contact X _4-2 opens, hot water supply switching circuit 27 operates and relay X ₆
The ON operation of the relay X 6 is forcibly blocked, and the switching contact X _6-1 of the relay X ₆ is fixed to the OFF side. Then, due to the OFF side switching state of the relay X ₆ and the closing of its normally open contact X _4-1 in conjunction with the operation of the heating relay X ₄ , a heating operation signal E is output and the heating switching circuit 2
5 is activated, the refrigerant circuit is switched to the heating operation cycle, and heating operation is performed. Therefore, when the heating operation command signal A of the heating operation command signal generating means 11 is output, _the normally open contact of the hot water supply relay
Even if the hot water supply operation command signal B is output by closing X _5-1 , the hot water supply switching circuit 27 is not activated due to the opening of the normally closed contact X _4-2 of the heating relay X ₄ , and the heating operation is maintained. When the heating operation command signal A of the heating operation command signal generating means 11 is output when the hot water supply operation command signal B is output, the hot water supply switching circuit 27 is activated by opening the normally closed contact X _4-1 of the heating relay X ₄ . After this is blocked and the hot water supply operation is stopped, the heating switching circuit 25 is activated and the heating operation is started. And heating operation command signal generation means 11
If the hot water supply operation command signal generating means 12 outputs the hot water supply operation command signal B by closing the normally open contact X _5-1 of the hot water supply relay X ₅ when the heating operation command signal A is not output, the heating When the normally closed contact X _4-2 of the relay X ₄ is closed, the hot water supply operation signal F is generated, the hot water supply switching circuit 27 is activated, and the hot water supply operation becomes possible. On the other hand, if it is the hot water supply time period, the program timer means 30 closes the contact 30a and outputs the hot water supply time period signal D. Therefore, relay X ₇ is turned on and closes its normally open contact X _7-1 . Now, when the water temperature in the hot water storage tank 4 is below the set temperature _T2 , the hot water supply operation command signal B is output from the hot water supply operation command signal generating means 12 by closing the normally open contact _X5-1 of the hot water supply relay _X5 . Then, the hot water supply switching circuit 27 is activated, the refrigerant circuit is switched to the hot water supply operation cycle, and hot water supply operation is performed. At the same time, the relay
X ₆ is turned on, its switching contact X _6-1 is switched to the ON side, and the operation of the heating switching circuit 25 is forcibly blocked. Therefore, when the hot water supply operation command signal generation means 12 outputs the hot water supply operation command signal B, the heating operation command signal generation means 11 outputs the heating operation command signal A.
Even if is output, switching contact X _6-1 of relay X ₆ above
By switching to the ON side, the heating switching circuit 25 is not activated and heating operation is not performed. Moreover, heating relay x ₄
Even if the normally closed contact X _4-2 of the relay X ₇ is opened, the operation of the hot water supply switching circuit 27 continues due to the closing of the normally open contact X _7-1 of the relay X 7, and the hot water supply operation continues. Further, when the hot water supply operation command signal B of the hot water supply operation command signal generation means 12 is output when the heating operation command signal A of the heating operation command signal generation means 11 is output, the hot water supply switching circuit 27 is immediately activated, and the relay X ₆ is activated. switching contact
By switching X _6-1 to the ON side, the heating switching circuit 25 is prevented from operating, and the heating operation is forcibly stopped. Then, when the heating operation command signal A of the heating operation command signal generating means 11 is output while the hot water supply operation command signal B of the hot water supply operation command signal generating means 12 is not output, the switching contact X _6-1 of the relay X ₆ By switching to the OFF side and closing the normally open contact X _4-1 of the heating relay X ₄ , the heating switching circuit 25 is activated and heating operation becomes possible. Further, when it is particularly desired to give priority to the heating operation over the hot water supply operation during the hot water supply period, the manual heating operation priority switch 55 is operated to close. Therefore, the contact 30a of the program timer means 30 is forcibly opened regardless of the program, and the heating operation priority signal G is output. As a result, even during the hot water supply period, the state is the same as that during the heating period, and the heating operation is performed with priority over the hot water supply operation. On the other hand, if it is desired to give priority to the hot water supply operation over the heating operation during the heating period, the manual hot water supply operation priority switch 56 is closed. Therefore, the contact 30a of the program timer means 30 is closed and the hot water supply operation priority signal H is output. As a result, even during the heating period, the same state as in the hot water supply period occurs, and the hot water supply operation is performed with priority over the heating operation.

[Table] is shown below.
Therefore, the program timer means 30 contains 24 times per day.
By simply programming the time by appropriately distinguishing it into heating time and hot water supply time, heating operation is given priority during heating time and hot water supply operation is given priority during hot water supply time. Hot water supply operation can be performed when heating operation is not required in the zone, and heating operation can be performed when hot water supply operation is not required during hot water supply hours, so when heating is required, hot water heating operation can be performed as much as possible while hot water storage is possible. Lack of quantity can be prevented. Moreover, if you want to give priority to the hot water supply operation during the heating time period and the heating operation during the hot water supply period, you can operate the manual heating operation priority switch 55 and the manual hot water supply operation priority switch 56, respectively, to set the program timer means. Since each of the above operations can be performed without resetting the 30 programs, special usage conditions can be accommodated with simple operations. As explained above, according to the present invention, a program timer means is provided in which the heating time period and the hot water supply time period are programmed to be distinguished from each other with 24 hours as one cycle, and the heating operation is performed with priority during the heating time period. On the other hand, during hot water supply hours, priority is given to hot water supply operation.
In addition, hot water supply operation can be performed when heating operation is not required during heating hours, and heating operation can be performed when hot water supply operation is not required during hot water supply hours, so hot water heating operation can be performed as much as possible while heating operation is possible when heating is required. This makes it possible to prevent insufficient hot water storage, which is preferable in practice.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of the present invention, Figure 2 is a block diagram showing the configuration of the present invention.
4 to 4 show embodiments of the present invention, FIG. 2 is a refrigerant circuit diagram of a heat pump type air-conditioning/heating water heater, FIG. 3 is an electric circuit diagram showing an operation switching circuit, and FIG. 4 is a hot water supply operation command signal generation It is an electric circuit diagram showing means. 4...Hot water storage tank, 11...Heating operation command signal generation means, 12...Hot water supply operation command signal generation means, 30...Program timer means, 40...Discrimination means, 50...Switching control means, 55...Manual heating operation priority switch, 56 ...Manual hot water supply operation priority switch.

Claims (1)

[Claims] 1 A heating operation command signal generating means 11 that detects that the room temperature is below a predetermined temperature _T1 and issues a heating operation command signal A, and a heating operation command signal generating means 11 that detects that the room temperature is below a predetermined temperature T1, and a heating operation command signal generating means 11 that detects that the room temperature is below a predetermined temperature _T2.
A hot water supply operation command signal generating means 12 detects that the following conditions are met and issues a hot water supply operation command signal B, and a heating time zone and a hot water supply time zone are programmed to be distinguished from each other with 24 hours as one cycle, and a heating time zone is programmed to distinguish between a heating time zone and a hot water supply time zone. A program timer means 30 that outputs the zone signal C and a hot water supply time zone signal D during the hot water supply time zone; and when the program timer means 30 outputs the heating time zone signal C, at least the heating operation command signal generating means 11 outputs the heating operation. When command signal A is received, heating operation signal E is output; when only hot water supply operation command signal B from hot water supply operation command signal generating means 12 is received, hot water supply operation signal F is output; while when hot water supply time period signal D is input, hot water supply operation signal F is output. At least when receiving the hot water supply operation command signal B from the hot water supply operation command signal generation means 12, the hot water supply operation signal F is transmitted to the heating operation command signal generation means 1.
A discriminating means 40 outputs a heating operating signal E when only the heating operation command signal A of No. 1 is received, and upon receiving the heating operating signal E of the discriminating means 40, the refrigerant circuit is switched to the heating operation cycle, while a hot water supply operation signal is output. 1. An operation switching device for a heat pump type heating water heater, comprising a switching control means 50 for switching to a hot water supply operation cycle in response to F.