JPS5872858A - Heat pump type hot-water supply machine combining air conditioning - 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 The present invention relates to an improvement in a heat honograph type water heater for cooling and heating water, which is capable of efficiently carrying out hot water supply operation of unit C1, hot water supply, and cooling mA conversion.

An embodiment of the present invention will be described below.

Figure 1 is a configuration diagram of the refrigerant circuit, where il+ is a pongee press machine, (
2) is a four-way switching valve, (, 3) is a solar supply canyon coil (3a
) several-needle water tank; (4) is the first throttling device, which is connected in series with the above-mentioned equipment [11 (2) and (3) for refrigerant distribution;

A- is an electric valve recirculating valve A that bypasses the refrigerant distribution coil (F) and the first refrigeration device (41) which are connected in series with each other for refrigerant distribution, and has an electric valve A t5j. ,
(B) bypasses the first print device (4)'i! 1
trdJ valve is I@B and contains electric valve B (Li). (7) has an outdoor heat exchanger C which is not used, (84 is a blower that blows air to the outdoor heat exchanger [71], and (9) has a second restrictor. There is an indoor heat exchanger C on the side, (11) is a blower that blows air to the indoor heat exchanger 11t), and α is an accumulator, which is the outdoor heat exchanger (7).

The second throttling device (9), the indoor heat exchanger (11, and the four-way switching valve (2) are connected in series with the refrigerant piping. (0) is the second throttling device (9) and the indoor heat exchanger (11). This is an electric valve circuit C that bypasses the exchanger +1tl, and has an electric valve 0 (l).

FIG. 2 is an air conditioner circuit diagram, in which (SW-i) is an operation switch, and (SW-2) is an air conditioning/heating changeover switch C, which has a neutral contact. (23W) is a condensing coil for hot water supply (3a
) How many needles hot water tank (3) is the water temperature thermostat for the internal hot water temperature indicator, (52C) is the 4-motor electromagnetic contactor for the pressure assembly machine fil, and 152Fi is the thermostat for the outdoor/double air blower a (8). Toratsuki's electromagnetic contactor (52F2) is an indoor blower (11
) is an electromagnetic contactor for electric motors. In addition, (Xl) is an auxiliary relay for heating operation command, and (Xz) is an auxiliary relay for cooling operation command, each of which is a thermostat for indoor temperature detection that serves as an air conditioner alarm. (23Al) and the cooling thermostat (23A2) are connected in series. (XQ
) is an auxiliary relay for the gas frost operation command, and is connected in series with the defrost thermostat (26D). (SV-A), (SV-B), and (sv-c) are electric valve A L51, electric valve B (6), and electric valve 0, respectively.
9 (to) coil. And (sv-4) is the coil of the four-way switching valve (2).

Next, the operation of this invention will be explained. First, the hot water supply operation will be explained. FIG. 3 is a refrigerant flow diagram during hot water supply operation, and the refrigerant flow direction is indicated by thick solid line arrows.

First, when the operation switch (SW-1) is turned on, the hot water condensing coil (3a) closes when the hot water temperature inside the hot water storage tank (3) is below a predetermined value, and the electromagnetic contactor closes. (52C) is energized and the compressor fi
+ is for driving. Also, because the normal defrost thermostat (26D) is open, the auxiliary relay (XQ) is not energized, and therefore the normally closed contact (xs-b) is closed, so the magnetic contactor (52Fl) is energized, outdoor 1i1
t+ blower (8) operates.Meanwhile, auxiliary relay C
Xx l, (Xz).

(xs) is not energized, and each normally open contact (Xz a
).

(Xz-a) and (XQa) are open, and normally closed contacts (Xm-b) and (XQ-b) are closed.

Therefore, the coil (5V-4) of the four-way switching valve (2), the coil (SV-A) of electric valve A (5), and the coil (SV-B) of electric valve B (6) are deenergized. , only the coil (sv7/) of electric valve 0 (11) is energized. Therefore, the four-way switching valve (2) is in the μII refrigerant flow direction position shown in FIG. 3, and the electric valve circuit A (A) , electric valve circuit B (
B) is closed, and the electric valve circuit C (C) is opened.

Regarding the refrigerant flow, the Naonshima pressure gas refrigerant discharged from the pressurized Mfl+ passes through the four-way switching valve (2) and flows through the hot water supply condensing coil (3a). 11 L3), exchanges heat with the low-temperature hot water supply, radiates heat, and becomes a high-pressure liquid refrigerant. Also,
The hot water in the hot water storage tank (3) collects heat and rises once. Hot water is used from the hot water outlet (14) at the top of the tank, and only the amount of water used is supplied from the city water outlet (15) at the bottom of the tank. Additionally, the liquid refrigerant is passed through the first restrictor fat
(The pressure is reduced by 4+, evaporates in the outdoor heat exchanger (July), passes through the electric valve circuit a<C), and passes through the four-way l; IJ valve (2).

Return to accumulator H and compressor il+. In this case, since the pressure resistance of the second throttle device (9) is large, the evaporated low-temperature gas refrigerant passes through the heel valve passage (mOtQ) and does not stay in the indoor heat exchanger nt3. In addition, the hot water tank (
3) Once the temperature of the self-supplied hot water rises above a predetermined value, the water temperature thermostat l-(23W) is activated and its contact is opened T.
Ru. Therefore, the electromagnetic contactors (520) and (52Fl) are de-energized, and the compressor (11) and external air blower (8) are stopped.If the hot water temperature falls again, the water temperature thermostat will be reset.
(23W) is restored and operation resumes.

Next, we will explain the problem during hot water supply and cooling operation.

FIG. 4 is a refrigerant flow diagram during hot water supply and cooling operations, and the refrigerant flow direction is indicated by thick solid line arrows. First, start the operation switch (
Turn on the heating/cooling switch (SW-1) and turn on the heating/cooling switch (SW-2).
When set to the "Cold" side, the most star for indoor cooling)
(23A2) is closed above a predetermined set value, and the auxiliary relay (Xz) is energized. Also, hot water tank (3)
When the water temperature of the hot water supply is below a predetermined value, the water temperature thermostat (23W) is closed as described above, and since the auxiliary and key heel device (XQ) is energized, its normally open contact (Xz-
A) is also closed at the same time. Therefore, the electromagnetic contactor (52
0), (52Fl) are energized, and the pressure auxiliary relay (11) and outdoor fan (81) are operated.Other auxiliary relays (Xi) and (X3) are de-energized. Normally open contact (Xi-a), (X3-a) i-J d path,
Since the normally closed contacts (Xa-b) remain closed, the coil (SV-4) of the four-way switching valve (2),
C(13) OJ = Phil (SV-A), (SV
-C) is de-energized, the coil (SV-B) of electric valve B (6) is energized, and electric valve circuit A ((rotation), C (C) is closed, electric supine 6B) is open. Become. At the same time, an electromagnetic contactor (52
F2) is energized, and the indoor l1llll:8 wind fan (11) is operated. Regarding the refrigerant flow, it flows through the compressor (11, four-way switching valve (2), condensing coil (3a), several-needle hot water tank (3)
, the electric valve circuit B (B) and the outdoor heat exchanger (7) condense, the pressure is reduced in the second throttling device (9), and the indoor heat exchanger (11) collects heat from the indoor air. , # Release, four-way switching valve (2), accumulator Q21, compression @ f
Return to i+. In this operation, when the room is cooled and the indoor air temperature drops to a predetermined value C, the room cooling thermostat (23A2) is activated and its contacts are closed and closed. By opening this contact, the auxiliary ejector (Xi),
(Xa) + (X3) is completely deenergized, and the deenergization and energization states of the electric valve coil and the electromagnetic contactor become the same as in the hot water supply operation described above, and the hot water supply operation continues. On the other hand, during hot water and cooling operation, the water m trt of self-supplied hot water in the hot water storage tank (3) rises, and even if the water temperature thermostat (23W) operates and its contact closes, if there is a request for cooling, the auxiliary electric appliance ( Xa)
Since the 'M open contact (Xa -a) of is closed, operation continues. In addition, in this case, the condensing coil for hot water supply (3
a) Since the hot water temperature in the hot water tank (3) is high, the condensing capacity decreases, so a control circuit (not shown) is installed to compensate for this with the outdoor 1111 heat exchanger (7). The wind cover of the blower (8) is controlled by.

Next, the heating operation will be explained. FIG. 5 is a refrigerant flow diagram during heating operation, and the refrigerant flow direction is indicated by thick solid arrows. First, turn on the -4 switch (S*-1) and set the air-conditioning/heating selector switch (SW-2) to the "warm" side.The indoor heating thermostat (23A,) will close below the predetermined set value. and the auxiliary relay (Xll is energized), and the auxiliary relay (Xa 1, (X!!)
are de-energized, so the magnetic contactors (520) and (52
Fl).

(52F2) is energized, and the compressor (11, very inside) and the outdoor fan (81) start operation. Also, the coil (SV-A) of electric valve A (5) is turned on. power, electric valve B 161, O (+31 coil (SV-B),
(SV-0) is de-energized and ``Electric ゛P times 16 AK
) is open 1, ``direct operated valve circuit B (B), c < O)
is omitted. The coil (SV-4) of the four-way switching valve (2) is energized and assumes the position in the refrigerant flow direction shown in FIG. Regarding the refrigerant flow, it flows through the compressor (11), the four-way switching valve (2), radiates heat to the indoor air at the all-inside heat exchanger (11), condenses it, and then passes through the second restrictor ((91) to reduce the pressure. , Heat is collected from the outside air in the outdoor heat exchanger 4 (7), evaporated, and the electric supine M A
It passes through (A) and returns to the four-way switching valve (2), the accumulator (121), and the compressor (11).

In this case, since the pressure resistance of the first throttling device (4) is large, the refrigerant passes through the '4 electric valve passage A (A) and is transferred to the hot water supply condensing coil (3a). I never fall asleep. Once the indoor air temperature rises to a predetermined value, the mold heating thermostat 1- (23Al) is activated and its contacts are closed and closed. By opening this contact, the auxiliary relay (Xz
), (Xa), and (X3) are all deenergized, and the hot water supply operation continues in the same way as during the above-mentioned fern supply operation.

Next, the defrost operation will be explained. FIG. 6 is a refrigerant flow diagram during defrost operation, and the refrigerant flow direction is indicated by thick solid arrows. The outdoor IM heat exchanger (which acts as an evaporator during hot water supply operation and heating operation in winter)
71 and the evaporation singing level falls below the predetermined setting of 1IN1, the 4 armpits are detected and the contacts of the defrost thermostat (26D) are closed, and the auxiliary relay (X3) is closed.
is energized. Therefore, during hot water supply operation, the auxiliary electric appliance (X3)
The /1tl-i11 contact is closed, the normally closed contact is closed, and the electromagnetic contactor (52F2), electric valve Af51, B1
The coils (SV-A) and (SV-B) of 6+ are deenergized, the blower (3) is stopped, and the electric valve circuits A (Shu and I3 (B)
) has a closed I name. Mako, the coil (SV-4) of the four-way zero-ridge valve (2), ? 4 (Valve train C (1310J coil (sv-a) is energized, (valve train circuit C (0) is closed. Warm)) The same operation occurs during J operation. Regarding the refrigerant flow, Pressure 41+j machine (11, four-way switching valve (
2), electric valve circuit c ta) and flow, outdoor t1it+N
& Melt and condense the frost that has been saved in the converter (7). In this case, Hironetsu Koine said, ``The outdoor fan (8) is stopped while the box is being used. Room Bi” side heat protector + 1tJ
Under the ambient temperature conditions (the outer heat is more intense than I71), the pressure-adjusted gas refrigerant discharged from the compressor passes through the electric cell 1 IFVC (C) and is heated to the indoor side. Vessel 1
I never fall asleep. Outdoor 1111 heat exchanger (7
The liquid refrigerant condensed in ) is depressurized in the first expansion device (4), evaporated in the vertically assembled coil (3a), several-needle tank (3), and transferred to the four-way switching valve (2) and the accumulator (12). 4 machines with a pressure of 1 kt (go back for the first time. In this case, the hot water (a certain amount of hot water is still stored) is used as an evaporator.
Because we use the condensing coil (3a) for hot water supply in the hot water storage tank (3), we are able to maintain a high level of seafood quality.
IJT function measures the ability to improve during defrosting, and can shorten defrosting time. In addition, since the defrost time is short (about 2 to 3 minutes), the temperature of the self-supplied hot water in the hot water storage tank (3) is hardly lowered, and the operation efficiency is improved. When defrosting ends and the temperature of the outdoor heat exchanger (7) rises, the defrost thermostat (26D) returns to normal operation, returning to heating operation and hot water supply operation.

As described above, in this invention, the l"d unit can efficiently perform hot water supply operation, hot water supply and cooling operation, and 11 room operation, and can also shift from heating operation to defrost operation and vice versa. At this time, the number of times the four-way switching valve is switched @C is applied to perform defrost, so the number of switching times of the four-way switching valve as a unit is greatly increased by ρ, A slightly, and the risk of failure of the four-way switching valve is increased. The frequency of occurrence is also reduced, and if it is due to switching of the four-way switching valve,
Cut! Although the high and low pressures will reverse after the sudden +fiJ, this will not happen, and the load on the pumping equipment can also be reduced.

Furthermore, during defrost operation (1), the evaporation temperature is maintained high using the water temperature of the hot water storage tank, and the capacity is greatly increased, so that the time during defrost + iJi can be shortened.

[Brief explanation of drawings]

Each figure shows an embodiment of the present invention, and FIG. 1 is a block diagram of a refrigerant circuit, FIG. 2 is an electric circuit diagram, and FIGS. 3, 4, and 5. and Figure 6 are respectively during hot water supply operation, hot water supply -
FIG. 2 is a refrigerant flow chart during cooling transition, during air conditioning operation, and during defrost operation. In the figure,] 1) is the press, (2) is the four-way switching valve, (3) is the hot water supply condensing coil (3aJ1/1 storage information, and (4) is the first
crest scissors d1 (51 is electric valve A1 (63 is electric valve B1 (
7) is an outdoor heat exchanger, (91 is a second embossment device, II
IJ is the indoor heat exchanger, α (to) is the heel @ valve c, (A
), (B), and Cc) are respectively city motion square circuit A. B and C. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Kuzu ”if Shin −

Claims (1)

[Claims] A pressure M machine, a 40,000 switching valve, a condensing coil for hot water supply, a first throttling device, a non-use side heat exchanger, and a second throttling device. and a circuit A that connects the use side heat exchanger in sequence and bypasses the hot water supply condensing coil and the first throttle device, a circuit B that bypasses the first throttle device, and a circuit B that bypasses the first throttle device, and the second circuit.
circuit C that bypasses the expansion device and the heat exchanger on the user side.
When the four-way switching valve is switched to one side, the circuits A and B are closed, the circuit C is opened to perform hot water supply operation, the circuits A and C are closed, and the circuit 6B is opened. When the four-way gJ valve is switched to the other side, the circuits B and C are closed and the circuit A is closed.
Open the circuit to allow heating operation. In this case, when defrosting the heat exchanger on the unused side from the heating operation described above, the four-way switching valve is switched to the other side, the circuits A and B are closed, and the circuit C is closed.
By opening the circuit, the non-use side heat exchanger becomes a condenser,
A heat pump water heater for heating and cooling, which is patented in that the condensing coil for hot water supply functions as a steamer.