JPS611969A - 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] [Technical Field of the Invention] This invention uses a heat pump to cool and heat! The present invention also relates to an air-conditioning/heating/hot-water supply heat pump device that can heat water in a hot water storage tank, and particularly relates to an air-conditioning/heating/hot-water heat pump device that guarantees the temperature of hot water supplied from a faucet.

[Prior art]

2. Description of the Related Art Conventionally, there has been a type of heat pump device for heating, cooling, and hot water supply that uses a heat pump to heat water in a hot water storage tank, as shown in FIG.

In the same figure, 1 is a compressor, 7 is a four-way valve for switching between air conditioning and heating,
3 is an indoor heat exchanger, DA is a reversible refrigerant expansion valve, and 3 is an outdoor heat exchanger, which are connected in a closed loop to form a cooling and heating cycle system. Also, 6
7 is a three-way valve installed in the passage between the compressor L and the four-way valve A, and 7 is a hot water storage tank, which is equipped with a heating coil G for heating water, and one end of this heating coil is connected to the discharge of one of the three-way valve B. The other end is connected to port c, and the other end is connected to each solenoid valve 9b, ? connected via c. 1
0 is the city water intake provided in the above hot water tank, 1 is the hot water faucet connected to the above hot water tank, / is the above solenoid valve? b
+9c and a three-way valve 6.

Further, a solenoid valve 9a is provided in a passage connecting the four-way valve and the indoor heat exchanger 3.

In the conventional air conditioning/hot water heat pump system configured as described above, during heating operation, the high-temperature, high-pressure refrigerant discharged from the compressor I flows into the three-way valve B and discharges through the three-way valve B.
From a + b, it passes through the four-way valve through the broken line path to the indoor heat exchanger 3, where it is condensed, further passes through the expansion valve, evaporates in the outdoor heat exchanger 3, and is compressed again through the four-way valve. It is circulated in a cycle that returns to machine 1.

Also, during heating and hot water heating, a part of the refrigerant discharged from the compressor flows into the same heating circuit as during heating, and the remaining refrigerant passes through the inflow and discharge bows of the three-way valve A and is heated. After flowing to the coil S and condensing there, the solenoid valve 9
b, and joins with the refrigerant condensed in the indoor heat exchanger 3,
Furthermore, this combined refrigerant flows to the compressor I via the expansion valve, the outdoor heat exchanger S, and the four-way valve, as in the case of heating.

On the other hand, during cooling operation, the high-temperature, high-pressure refrigerant discharged from the compressor 1 flows into the outdoor heat exchanger 3 through the path shown by the solid line from the inflow and discharge bow of the three-way valve B to the four-way valve B, and then flows into the outdoor heat exchanger 3. After being condensed, it passes through an expansion valve and reaches the indoor heat exchanger 3, where it evaporates. This gas refrigerant returns to the compressor 1 again through the four-way valve 1 and is compressed and liquefied.

When heating hot water for cooling, the refrigerant discharged from the compressor flows through the inflow and discharge ports of the three-way valve 8. C, the water reaches the heating coil S of the hot water tank t, where it condenses to heat the water in the hot water tank. Is the condensed refrigerant a solenoid valve? C passes through the expansion valve to the indoor heat exchanger 3, where it evaporates,
While cooling the indoor air, the evaporated refrigerant gas is returned to the compressor l via the four-way valve.

In addition, during hot water heating operation, the refrigerant discharged from the compressor 1 passes through the inflow and discharge arc of the three-way arc and reaches the heating coil S, where it condenses and heats the water in the hot water storage tank. The condensed refrigerant then passes from the electromagnetic valve 9b through the expansion valve DA to the outdoor heat exchanger S, where it evaporates. This gas refrigerant returns to the compressor l again through the four-way valve.

In the conventional heat pump device as described above, the water heating coil T is installed at the bottom of the hot water storage tank, so if the hot water is not boiling, it is difficult to obtain hot water at the required temperature. The entire amount of water in the hot water tank 7 must be boiled,
This takes time, and if the hot water is supplied before all of the water is boiled, there is a problem in that the temperature of the hot water supplied from the faucet l/ may not be guaranteed.

[Summary of the invention]

This invention was made in order to solve the above-mentioned conventional problems.Another heating coil is provided at the top of the hot water storage tank, thereby increasing the water temperature at the top of the hot water storage tank, thereby lowering the temperature of hot water supplied from the faucet. The purpose of the present invention is to provide a heat pump device for heating, cooling, and hot water supply that can guarantee the following.

[Embodiments of the invention]

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

In FIG. 2, the same parts as in FIG. 1 are given the same reference numerals as in FIG. We will focus on the parts that differ from Figure 1.

That is, the difference between the heat pump device in the heat pump embodiment and the one shown in FIG.
3 is arranged at the upper part of the hot water storage tank 7. Also, /11
．． /! t is a three-way solenoid valve for switching the upper heating coil 73 and the lower heating coil g to the three-way valve base on the compressor l side, and these three-way valves are the discharge port (C) and the solenoid valve ? of the three-way valve base. b+? One end of the upper heating coil 13 is connected to one discharge port (b) of the three-way valve/41, and the other end is connected to the other discharge port (b) of the three-way valve/41. One end of the lower heating coil S is connected to one discharge port b of the three-way valve /j, and the other end is connected to the other discharge port C side of the three-way valve /j.

Further, 16 is a temperature sensor that detects the water temperature at the upper part of the hot water storage tank, and 17 is a temperature sensor that detects the temperature detected by the temperature sensor 16, and the three-way valve/11. This is a control device that switches and controls /j.

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

If the temperature of the set volume of water in the hot water storage tank falls below the set temperature during hot water heating, the humidity sensor 16 detects this and sends a signal to the control device.
? switches the three-way valve lda so that the inflow port a and the discharge port b communicate with each other, and controls the three-way valve /j so that the inflow port a and the discharge port c communicate with each other. As a result, the high-temperature, high-pressure refrigerant discharged from the compressor 1 reaches the upper heating coil 13 from the inflow and discharge ports of the three-way valve base (a + C) through the inflow and discharge ports of the three-way valve/41) a and b. , where it condenses and heats the water in the upper part of the hot water storage tank 7. Thereafter, the condensed refrigerant passes through the inflow and discharge ports (a) and C of the three-way valve /j, passes through the solenoid valves 9b and 9c, and returns to the compressor l through the indoor or outdoor heat exchanger 3 or 3 and the four-way valve.

Additionally, if the water temperature of the set capacity in the hot water storage tank is higher than the set temperature, the temperature sensor/A that detects this sends a signal to the control device, and based on this, the control device The three-way valve /da is switched so that its inlet port (a) and discharge port (c) communicate with each other, and the three-way valve /j is switched and controlled so that its inlet port (a) and discharge port (1) are communicated with each other. Therefore, the refrigerant discharged from the compressor l passes through the inflow and discharge ports of the three-way valve base (a) + C, the inflow and discharge ports of the three-way valve/da) alc, and then flows through the inflow and discharge ports of the three-way valve /j. ) It reaches the lower heating coil t in the hot water tank through a+b, where it condenses and heats the water in the lower part of the hot water tank. After that, the condensed refrigerant is transferred to the solenoid valve 9b or 9c.
It will flow through to the indoor or outdoor heat exchanger 3 or 5.

In this embodiment as described above, hot water is always stored in the upper part of the hot water tank, and even if the entire amount of hot water in the hot water tank is not boiled, the temperature of the hot water supplied from the faucet can be adjusted. I can guarantee it.

In the above embodiment, the case where there is one indoor heat exchanger 3 has been described, but the same applies to two or more indoor heat exchangers.

Also, the same operation can be performed by combining two two-way valves instead of the three-way valve &, /da + / j, and the three-way valve A s
/4'+/j may be a solenoid valve capable of adjusting the flow rate. Furthermore, in the above embodiments, the indoor/outdoor heat exchanger is of the air type, but it goes without saying that these can also be applied to the water type. Furthermore, the switching of the three-way valves LDA and /S may be performed using a manual operation method.

〔Effect of the invention〕

As explained above, according to the present invention, another heating coil is provided in the upper part of the hot water storage tank, and the compressor is connected to the upper heating coil and the hot water tank heating coil (lower heating coil) according to the temperature of the hot water in the hot water storage tank. Since the refrigerant from the tank can be switched and supplied using a switching valve, the temperature of hot water supplied from the faucet can be guaranteed even if the entire amount of hot water in the hot water storage tank is not boiled.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a conventional heating/cooling/hot water supply heat pump device, and FIG. 2 is a configuration diagram showing an example of the heating/cooling/hot water supply heat pump device of the present invention. L... Compressor, K... Four-way valve, 3... Indoor heat exchanger, D... Expansion valve, S... Outdoor heat exchanger, 6...
Three-way valve, Ri...hot water tank, S...hot water tank heating coil,
9 a+? b +qc...Solenoid valve, 10...
City water intake, //...faucet, /ko...control device, 1
3... Upper heating coil, lda, /J... three-way valve, /
6...Temperature sensor, /ri...Control device. Note that the same reference numerals in the figures indicate the same or equivalent parts. Procedural amendment (voluntary) Showa 91% 231-] Commissioner of the Patent Office
111, Indication of the incident Patent application 1984-124084
No. 2, Title of the invention Air-conditioning/hot water supply heat pump device 3, Relationship with the case of the person making the amendment Hitoshi Katayama, representative of the patent applicant Department 4, Agent 5, Subject of amendment (1) The scope of the claims in the specification Column (2) Detailed explanation of the invention in the specification Column 6, Contents of amendment (1) The scope of claims in the specification is amended as shown in the attached sheet. (2) “Route” on page 4, line 15 of the specification.
and correct it. 7. Attached documents (1) Document stating the entire text of the amended claims 1 document stating the entire text of the amended claims 2. Claims (1) Compressor for air conditioning/heating switching Four-way valve, indoor heat exchanger. A heating and cooling cycle path is formed by connecting the expansion valve and the outdoor heat exchanger in a closed loop, and a heating coil of a hot water storage tank having a hot water supply faucet is connected to the heating and cooling cycle path using a three-way valve and a solenoid valve. In the air-conditioning/hot-water supply heat pump device that can be connected, a heating coil that guarantees the temperature of hot water supplied from the faucet is provided in the upper part of the hot water tank, and the refrigerant discharged from the compressor is connected to the upper heating coil and the hot water tank to heat the hot water tank. A heat pump device for heating, cooling, and hot water supply, characterized by being provided with switching means for selectively switching and supplying coils. (2) The air conditioning/hot water supply heat pump device according to claim 1, wherein the switching means comprises a switching valve. (3) The switching valve is composed of a three-way valve, and is controlled to switch based on a signal from a temperature sensor that detects hot water in a hot water storage tank. Air conditioning/hot water heat pump equipment. (4) The refrigerant discharged from the compressor can be switched and supplied to the upper heating coil side when the hot water temperature in the hot water storage tank is below a set value. Air conditioning/hot water heat pump equipment.

Claims (4)

[Claims] (1) A heating and cooling cycle path is formed by connecting a compressor, a four-way valve for switching between air conditioning and heating, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger in a closed loop, and
In an air conditioning/hot water heat pump device in which a heating coil of a hot water storage tank having a hot water supply faucet can be connected to the heating/cooling cycle path using a three-way valve and a solenoid valve, a heating coil that guarantees the temperature of hot water supplied from the faucet is connected to the heating coil in the hot water storage tank. 1. A heat pump device for air conditioning and hot water supply, characterized in that a switching means is provided in the upper part and selectively switches and supplies refrigerant discharged from the compressor to the upper heating coil and the hot water storage tank heating coil. (2) The air conditioning/hot water supply heat pump device according to claim 1, wherein the switching means comprises a switching valve. (3) Claim 2, characterized in that the switching valve is composed of a three-way frame and is controlled to switch based on a signal from a temperature sensor that detects hot water in a hot water storage tank. Air conditioning/hot water heat pump equipment. (4) The refrigerant discharged from the compressor can be switched and supplied to the upper heating coil side when the water temperature in the hot water storage tank is below a set value. The air conditioning/hot water heat pump equipment described.