JPH0244163A - Cooling with hot water supply, heating with hot water supply, and cooling and heating with hot water supply apparatus - Google Patents

Abstract

PURPOSE:To increase the service life of a compressor and to prevent an increase in power consumption by stopping a water feed pump that sends make-up water, and closing a valve furnished on a water feed pipeline that supplies make-up water in order to stop water supply only when the temperature of make-up water is higher than the temperature of coolant. CONSTITUTION:A refrigerant temperature detecting sensor 8, that detects the coolant temperature in a coolant pipeline 5a between a condenser 2 and a hot water heat exchanger 7, is furnished on the coolant pipeline 5a, and a make-up water temperature sensor 10, that detects the make-up water temperature, on a water feed pipeline 9 that is connected to the first hot water supply heat exchanger 7 to supply make-up water. A driving unit 11 is provided so as to stop make-up water supply in response to signals from the refrigerant and the make-up water temperature sensors 8 and 10 when the make-up water temperature is higher than the refrigerant temperature. Therefore, this constitution prevents the occurrence of such a phenomenon that the liquefied refrigerant condensed in the condenser is heated by make-up water and generates flashed gas.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to cooling hot water supply H'a using a heat pump,
Connected to heating and hot water supply equipment and cooling and heating water supply equipment.

[Conventional technology] Conventionally, a heat pump refrigerant circuit has been used, in which a compressor, a condenser (condenser), a heat exchanger (evaporator), and a throttle device are connected in series through refrigerant piping. It can be used for heating systems that use a heat exchanger as a heat exchanger on the user side, cooling IN systems that use a heat exchanger that serves as an evaporator as a heat exchanger on the user side, and can be used for both cooling and heating by cutting off the path of the refrigerant. Heating and cooling systems have been developed and used by Galffi. There are heating systems, air conditioning systems, and air conditioning FM display systems that use heat pumps, and in all of them, the refrigerant that is condensed through a heat exchanger that serves as a condenser is sent to a throttle device where it is depressurized. , 1if passes through the heat exchanger that serves as the condenser.
The cooled refrigerant still has sufficient heat. Recently, it has been found that heating and cooling capacities can be increased by further reducing the heat of the refrigerant in this position. IINM hot water systems, cooling water heating systems, and cooling/heating hot water systems have been developed that are capable of exchanging heat with water to increase the heating capacity and cooling capacity and also supply hot water.

[Problems to be Solved by the Invention] The device that exchanges the heat of the refrigerant that has passed through the heat exchanger serving as the condenser with water has a significant increase in heating capacity and cooling/heating capacity. It also showed excellent effects such as being able to heat hot water and being economical, but in order to obtain such effects,
0. For example, when the room temperature is low at the start of heating operation, 4. The temperature of the refrigerant must always be higher than the water temperature. If the temperature of the refrigerant that has been heat exchanged in the heat exchanger that is used as a heat exchanger is low and the temperature is lower than the temperature of the make-up water that is trying to exchange heat with this refrigerant, the condensed and liquefied refrigerant may The temperature of the water heats up and rises, generating flash gas. As a result, the flow rate of the refrigerant decreases and the heating capacity decreases, and the condensing pressure increases, which increases the power consumption of the compressor and reduces the compressor's power consumption. A large load will be placed on it, which may cause a malfunction.

The present invention aims to solve the above-mentioned problems by providing a cooling hot water supply system, a TL hot water supply system, and a cold 11M hot water aperture.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a compressor, a heat exchanger serving as a condenser, a heat exchanger serving as an evaporator, and a visu HII.
In the cooling hot water supply gaW, a hot water supply heat exchanger is connected between the condenser and the expansion device to a heat pump refrigerant circuit consisting of a heat pump refrigerant circuit, and makeup water is heated by the hot water supply heat exchanger.
The temperature of the refrigerant between the condenser and the heat exchanger for hot water supply and the temperature of the make-up water sent to the heat exchanger for hot water supply are detected, and when the make-up water temperature is higher than the temperature of the refrigerant, the pump that sends the make-up water is activated. A driving device was provided to stop the supply of make-up water by closing a valve provided on the water supply piping that supplies the make-up water.

In addition, the pressure 111[,,II is placed between the condenser and the throttle device in a heat pump refrigerant circuit consisting of a heat exchanger serving as a condenser, a heat exchanger serving as an evaporator, and a throttle device! In the heating hot water supply a'a, in which the 81-hour heat exchanger is connected and the make-up water is heated by the hot water heat exchanger, the temperature of the refrigerant between the condenser and the hot water heat exchanger and the hot water supply heat exchanger are The temperature of the make-up water sent to the heat exchanger is detected, and when the make-up water temperature is higher than the refrigerant temperature, the make-up water pump is stopped or the valve installed on the water supply pipe that supplies the make-up water is closed and the make-up water is stopped. A driving device was installed to stop the water supply.

Also, pressure I! refrigerant switching device, an indoor heat exchanger that functions as a condenser during heating and an evaporator during cooling, an outdoor heat exchanger that functions as an 1iWA unit during cooling and an evaporator during heating, and a heat pump refrigerant circuit that functions as a throttling device. ,
In a cooling/heating water supply system in which a hot water heat exchanger is connected between the IIM device and the throttling device, and the make-up water is heated by the hot water heat exchanger, the 1iIIIi device and the hot water heat exchanger are detects the temperature of the refrigerant between and the temperature of the make-up water sent to the hot water heat exchanger, and when the make-up water temperature is higher than the refrigerant temperature, stops the make-up water pump or on the water supply piping that supplies the make-up water. A drive device was installed to close the valve installed in the tank and stop the supply of make-up water.

[Function] According to the present invention, the temperature of the refrigerant between the condenser and the heat exchanger for hot water supply and the temperature of the make-up water sent to the heat exchanger for hot water supply are detected, and the make-up water temperature is lower than the refrigerant temperature. We have installed a drive device that stops the supply of make-up water by stopping the pump that sends make-up water or closing the valve on the water supply piping that supplies make-up water when the water is high. When the temperature of the make-up water is higher than the temperature of the refrigerant in the condenser and hot water supply heat exchanger, the drive device operates to stop the make-up water supply bottle 7, or a system installed on the water supply piping that supplies make-up water. The valve will be closed and the supply of makeup water will be stopped, and MI
! This prevents a situation in which the refrigerant condensed and liquefied in the container is heated by the temperature of the make-up water and rises, causing flash gas.

[Example] The present invention will be described in detail below based on an example shown in the drawings.

Figures 1F2 and M2 are circuit explanatory diagrams of the cooling water heater according to the present invention. Squeezing device 3. A heat pump refrigerant passage 6 is constituted by a circuit in which the evaporator 4 is connected in series with a refrigerant pipe 5, and a hot water supply heat exchanger 7 is connected on this refrigerant pipe 5 between the condenser 2 and the throttling device 3. has been done. The evaporator 4 is installed indoors and serves as a user-side heat exchanger.

In a cooling water heater comprising the above-mentioned refrigerant circuit.

Wow A! 12 and the hot water supply heat exchanger 7
A refrigerant temperature detection sensor 8 is installed above the refrigerant to detect the temperature of the refrigerant in between.A refrigerant temperature detection sensor 8 is installed on the water supply pipe 9 that connects to the hot water heat exchanger 7 and supplies makeup water to the hot water heat exchanger 7. Make-up water temperature detection sensor 1 that detects the temperature of make-up water
0, receives signals from the refrigerant temperature detection sensor 8 and the make-up water temperature detection sensor 10, and stops the supply of make-up water when the make-up water temperature becomes higher than the refrigerant temperature.
1W11 was established.

The supply of make-up water by the drive device 111 may be stopped by stopping the pump 12 that supplies make-up water (Atsushi 1121), or by providing a valve 13 on the water supply pipe 9 that supplies make-up water. This may be carried out with the valve 13 closed (FIG. 2).

In the embodiment shown in Fig. 3 [F], a heat exchanger 14 is connected to the discharge side of the pressure 11111 on the refrigerant pipe 5 constituting the refrigerant circuit of the embodiment shown in Fig. 1. The water supply piping 9 is connected to the hot water supply heat exchanger 7 to heat the make-up water, and the heat exchanger 14 further heats the make-up water. [F]Although not shown, a heat exchanger is connected to the discharge side of the pressure side 1 on the refrigerant pipe 5 constituting the refrigerant circuit of the embodiment shown in Figure 2, and the water supply pipe 9 is connected to this heat exchanger. It's okay.

Figures 4 and 5 are circuit explanatory diagrams of the heating and hot water supply system according to the present invention, in which the pressure side 1. Condenser 2. Squeezing device JI3. A heat pump refrigerant port 118 is constituted by a circuit in which the evaporator 4 is connected in series with the refrigerant pipe 5, and a heat exchanger 7 for hot water supply is connected between the refrigerant pipe 5, the 1111 device 2, and the throttle device 13. has been done. The condenser 2 is installed indoors and serves as a user-side heat exchanger.

In the heating and hot water supply system consisting of the above refrigerant circuit, the condenser 2
A refrigerant temperature detection sensor 8 is provided on the refrigerant pipe 5a between the hot water supply heat exchanger 7 and the refrigerant pipe 5a, and a refrigerant temperature detection sensor 8 is provided to detect the temperature of the refrigerant in between. A make-up water temperature detection sensor 10 is provided on the pipe 9 to detect the temperature of the make-up water sent to the $8JJ heat exchanger 7, and the refrigerant temperature detection sensor 8 and the make-up water temperature detection sensor 1
A drive device 11 is provided which receives a signal from 0 and stops the supply of make-up water when the make-up water temperature becomes higher than the refrigerant temperature.

The supply of make-up water by the drive device 11 may be stopped by stopping the pump 12 that supplies make-up water (Fig. Atsushi 4), or by providing a valve 13 on the water supply pipe 9 that supplies make-up water. The valve 13 may be closed (FIG. 5).

The embodiment shown in FIG. 6 has a heat exchanger 1 on the discharge side of the pressure side 1 on the refrigerant pipe 5 constituting the refrigerant circuit of the embodiment shown in FIG.
4 is connected, the water supply pipe 9 is connected to this heat exchanger 14, and the make-up water that has been heat exchanged and heated by the hot water supply heat exchanger 7 is further heated by the heat exchanger 14. Although not shown, a heat exchanger is connected to the discharge side of the pressure side 1 of the refrigerant pipe 5 constituting the refrigerant circuit of the embodiment shown in FIG. good.

Figures 7 and 8 show the cold Ill! according to this invention. It is a circuit explanatory diagram of the 8 hot water device, and the compressor 1. Refrigerant switching device +5. I
The indoor heat exchanger 16 serves as an evaporator during cooling, and the outdoor heat exchanger 17 serves as a condenser during cooling and an evaporator during heating. A heat pump refrigerant circuit 6 is constituted by the circuits connected in series, and a heat exchanger 7 for hot water supply is connected between the refrigerant pipe 5, the condenser and the expansion device 3.

In the embodiment shown in FIG. 7, the hot water supply heat exchanger 7 is always connected to the condenser and the throttle H during either heating or cooling operation.
It has a circuit configuration connected on the refrigerant pipe 5 between the refrigerant and the refrigerant N3. For this purpose, two throttling devices 13a, 3b are connected in series between the indoor heat exchanger 16 and the outdoor heat exchanger 17, and each throttling device 3a, 3b has a check valve 1.
8a.

Bypass pipes +9a and 19b with 18t) are provided,
A hot water supply heat exchanger 7 is connected between the two throttle devices 3a and 3b. During heating operation, the refrigerant flowing from the indoor heat exchanger 16, which serves as a condenser, passes through the bypass pipe +9a without passing through the throttling device 3a, passes through the hot water supply heat exchanger 7, and passes through the throttling device 131) to reduce the pressure. On the other hand, during the cooling operation, the refrigerant flowing from the indoor heat exchanger 17, which serves as the i-condenser, flows through the expansion device 3b.
The water does not pass through the bypass pipe +9b, passes through the hot water supply heat exchanger 7, and passes through the throttle device 13a to be depressurized.

In the cooling/heating hot water supply device comprising the refrigerant circuit, a refrigerant temperature detection sensor 8a is provided on the refrigerant pipe 5b between the indoor heat exchanger 16 and the hot water supply heat exchanger 7 to detect the temperature of the refrigerant therebetween, Furthermore, a refrigerant temperature detection sensor 8b is provided on the refrigerant pipe 5c between the outdoor heat exchanger 17 and the hot water supply heat exchanger 7 to detect the temperature of the refrigerant therebetween, and is also connected to the hot water supply heat exchanger 7. A make-up water temperature detection sensor 10 is provided on the water supply pipe 9 for supplying make-up water to detect the temperature of the make-up water sent to the hot water supply heat exchanger 71. A refrigerant detection sensor 8 is provided on the refrigerant pipe 5b between the indoor heat exchanger 16 serving as a condenser and the hot water supply heat exchanger 7.
a or the output signal from the refrigerant temperature detection sensor 8b provided on the refrigerant pipe 5C between the outdoor heat exchanger 17 and the hot water supply heat exchanger 7, that is, the output signal from the refrigerant temperature detection sensor 8a during heating operation, During cooling operation, a drive device receives an output signal from the refrigerant temperature detection sensor 8b and a signal from the make-up water temperature detection sensor 10, and stops the supply of make-up water when the make-up water temperature becomes higher than the refrigerant level. 11
has been established. The signals from the refrigerant temperature IK, the detection sensor 8a, and the refrigerant temperature detection sensor sb are automatically switched by switching between heating operation and cooling operation. Exchanger 1
Refrigerant temperature detection sensor 8 between the heat exchanger 7 and the hot water supply heat exchanger 7
a* Yes, the signal from the refrigerant temperature detection sensor 8b is the drive H
111.

The supply of make-up water by the drive gi 111 may be stopped by stopping the bong 712 that supplies make-up water (FIG. 7), or by providing a valve 13 on the water supply pipe 9 that supplies make-up water. This may be done by closing the valve 13 (see Figure 8).

The embodiment shown in Fig. 9 and Fig. 1o is the seventh
The basic circuit is the same as the refrigerant circuit shown in the figure.

In this example, )! In order to have a circuit configuration in which the hot water supply heat exchanger 7 is always connected to the refrigerant pipe 5 between the 111m unit and the throttling device 13 during both air conditioning and cooling operations, a manifold check valve is installed. 20, during heating operation and cooling operation, the refrigerant flowing from the indoor heat exchanger 16 and the refrigerant flowing from the outdoor heat exchanger 17 always pass through the manifold check valve 20 to the hot water heat exchanger 7. It is configured to pass through the print device 3 after passing through the .

In the cooling/heating hot water supply device comprising the refrigerant circuit, a refrigerant temperature detection sensor 8a is provided on the refrigerant pipe 5b between the indoor heat exchanger 16 and the hot water supply heat exchanger 7 to detect the temperature of the refrigerant therebetween, Furthermore, a refrigerant temperature detection sensor 8b is installed on the refrigerant pipe 5C between the outdoor heat exchanger 17 and the hot water supply heat exchanger 7 to detect the temperature of the refrigerant therebetween. A make-up water temperature detection sensor 1oJ!- is installed on the water supply pipe 9 that connects and supplies make-up water (to detect the temperature of the make-up water sent to the heat exchanger 7 for hot water supply. 16 and the hot water supply heat exchanger 7, or the refrigerant temperature detection sensor 8a provided on the refrigerant pipe 5b between the outdoor heat exchanger 17 and the hot water supply heat exchanger 7.
An output signal from the refrigerant temperature detection sensor 8b provided on the refrigerant pipe 5C between the A drive bag @ 11 is provided which receives a signal from the make-up water temperature detection sensor 10 and stops the supply of make-up water when the make-up water temperature becomes higher than the refrigerant temperature. The signals from the refrigerant temperature detection sensor 8a and the refrigerant temperature detection sensor 8b are automatically switched by switching between heating operation and cooling operation, that is, the signals from the refrigerant temperature detection sensor 8a and 8b are always 1.
161 indoor heat exchangers with an area of 15m5! Alternatively, a signal from the refrigerant temperature detection sensor 8a or 8b between the outdoor heat exchanger 17 and the hot water supply heat exchanger 7 is input to the drive H position 11.

Stopping the supply of make-up water by the drive H+l 111 may be done by stopping the pump 712 that supplies make-up water (expletive 912!l), or by installing the valve 13 on the water supply pipe 9 that supplies make-up water. Alternatively, the valve 13 may be closed (FIG. 10).

In the embodiment shown in FIG. 11, a heat exchanger 14 is connected to the discharge side of the compressor 1 on the refrigerant pipe 5 constituting the refrigerant circuit of the embodiment shown in FIG. w9 is connected, and the make-up water heated by heat exchange with the hot water supply heat exchanger 7 is further heated with the heat exchange w14. Also, although not shown, on the refrigerant pipe 5 constituting the refrigerant circuit of the embodiment shown in FIGS. 8 to Mloea, the compressor 1
A heat exchanger may be connected to the discharge side of the pump, and the water supply pipe 9 may be connected to this heat exchanger.

In [F], 21 is a hot water storage tank.

[Effects of the Invention] As described above, the cooling hot water supply device, the heating hot water supply device, and the cooling water heating device according to the present invention have the following advantages: The temperature of the make-up water sent to the heat exchanger is detected, and when the make-up water temperature is higher than the refrigerant temperature, the make-up water pump is stopped or the valve installed on the water supply pipe that supplies make-up water is closed to make the make-up water. Since a drive device is provided to stop the water supply, the drive device operates when the temperature of the make-up water sent to the hot water supply heat exchanger is higher than the temperature of the refrigerant between the condenser and the hot water supply heat exchanger. The supply of make-up water is stopped by stopping the pump that supplies make-up water or closing the valve installed on the water supply piping that supplies make-up water, and heat exchange between the refrigerant and make-up water does not take place.
1! The refrigerant condensed and liquefied in the condenser is heated by the temperature of the make-up water and rises, generating flash gas!
As a result, a decrease in heating and cooling capacity is prevented, and the load on the pressure 18 machine due to the generation of flash gas is eliminated, so the service life of the pressure wa machine is increased. This also has the effect of preventing an increase in power consumption.

[Brief explanation of the drawing]

1 to 3 are circuit explanatory diagrams showing an example of implementation of the cooling hot water supply apparatus according to the present invention, and Figures 4 to 6 are circuit explanatory diagrams showing an example of implementation of the warming 1N hot water supply apparatus according to the present invention. ,
Fig. 7 to Fig. 11 are circuit explanatory diagrams showing an example of the implementation of the cooling/heating/hot water supply device according to the present invention. 1...pressure gill 2..., m1ll machine 3...
Throttle device 14...Evaporator 5...Refrigerant piping 6...Heat pump refrigerant port 7.
... Heat exchanger for spinning and drying 8 ... Refrigerant temperature detection sensor 9 ... Water supply piping 10 ... Make-up water temperature detection sensor 11 ... Drive H@ 12 ... Pump 12 ... Valve 16 ...Indoor heat exchanger 17...Outdoor heat exchanger patent

Claims (3)

[Claims] (1) A heat exchanger for hot water supply is connected between the condenser and the throttle device to a heat pump refrigerant circuit consisting of a compressor, a heat exchanger serving as a condenser, a heat exchanger serving as an evaporator, and a throttle device,
In an air-conditioning water supply system in which make-up water is heated by a heat exchanger for hot water supply, the temperature of the refrigerant between the condenser and the heat exchanger for hot water supply and the temperature of the make-up water sent to the heat exchanger for hot water supply are detected. An air conditioner equipped with a drive device that stops the supply of make-up water by stopping a pump for supplying make-up water or closing a valve installed on the water supply piping that supplies make-up water when the make-up water temperature is higher than the refrigerant temperature. Water heater. (2) a heat pump refrigerant circuit consisting of a compressor, a heat exchanger serving as a condenser, a heat exchanger serving as an evaporator, and a throttling device; connecting a hot water supply heat exchanger between the condenser and the throttling device;
In a heating water heater that heats make-up water with a heat exchanger for hot water supply, the temperature of the refrigerant between the condenser and the heat exchanger for hot water supply and the temperature of the make-up water sent to the heat exchanger for hot water supply are detected. When the make-up water concentration is higher than the refrigerant temperature, the heating device is equipped with a drive device that stops the make-up water supply by stopping the make-up water pump or closing the valve provided on the water supply piping that supplies the make-up water. Water heater. (3) Consists of a compressor, a refrigerant switching device, an indoor heat exchanger that functions as a condenser during heating and an evaporator during cooling, an outdoor heat exchanger that functions as a condenser during cooling and an evaporator during heating, and a throttling device. In the cooling/heating water supply system, a heat exchanger for hot water supply is connected to the heat pump refrigerant circuit between the condenser and the expansion device, and make-up water is heated by the heat exchanger for hot water supply. detecting the temperature of the refrigerant between the refrigerant and the temperature of the make-up water sent to the hot water heat exchanger,
A cooling/heating hot water supply system equipped with a drive device that stops the supply of make-up water by stopping a pump for supplying make-up water or closing a valve provided on the water supply piping that supplies make-up water when the make-up water temperature is higher than the refrigerant temperature. .