JPS6321453A - Air conditioner - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat pump type air-conditioning device that can obtain sufficient cooling and heating effects.

[Prior Art] Conventionally, heat pump type cooling and heating systems generally include:
Pressure 1iiiIl! ! It consists of a refrigerant switching device, a user-side heat exchanger that functions as a condenser during heating and an evaporator during cooling, a heat source-side heat exchanger that functions as a condenser during cooling and an evaporator during heating, and a throttle mechanism.

[Problem that Hatsu II+ is trying to solve] Heat pump type heating and cooling equipment uses the outside air temperature as a heating pad, so in conventional heating and cooling equipment, if the outside temperature is too low during heating, the heating spall will not work. This causes problems such as insufficient heating power and the inability to obtain a sufficient heating effect, and when the outside temperature is too high during cooling, the cooling capacity decreases and it is not possible to obtain a sufficient cooling effect.

In view of the above-mentioned points, the present invention provides an air-conditioning and heating system that is capable of obtaining a sufficient heating effect even when the outside temperature is low, and a sufficient cooling effect even when the outside temperature is high. It is.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a compressor, a refrigerant switching device, a user-side heat exchanger that functions as a condenser during heating and an evaporator during cooling, and a condenser during cooling. The main heat pump refrigerant circuit is composed of a heat source side heat exchanger that serves as an evaporator during heating, and a throttling mechanism, and a residual heat heat exchanger is disposed between the condenser and the throttling mechanism. An auxiliary heat pump refrigerant circuit is installed in which the residual heat of the refrigerant that has passed through the condenser of the refrigerant circuit is used as a heat source, and in the auxiliary heat pump refrigerant circuit, there is a It has a heat exchanger located at each location and a switching valve that sets the heat exchanger on the user side heat exchanger to 13J and linear temperature during heating, and uses the heat exchanger on the heat source side heat exchanger as a condenser during cooling. The circuit was configured.

[Function] According to the present invention, during either cooling or heating operation of the main pump refrigerant circuit, the refrigerant is condensed in the user side heat exchanger serving as a condenser or the heat source side heat exchanger. The refrigerant in the auxiliary heat pump refrigerant circuit, which has a residual heat of 8rt, condenses in the heat exchanger on the user side during heating operation, increasing the heating capacity. Also, during cooling operation, the refrigerant that condenses in the heat exchanger on the heat source side heat exchanger and becomes low temperature in the throttling mechanism condenses in the heat source side heat exchanger of the main heat pump refrigerant circuit, but still has residual heat. By exchanging heat with the refrigerant in the heat exchanger, the refrigerant in the main heat pump refrigerant circuit is further cooled here and flows to the throttling mechanism, thereby increasing the cooling running force in the user-side heat exchanger.

[Example] Hereinafter, this invention will be described in detail based on an example shown in the drawings.

1 is a compressor, 2 is a refrigerant switching device, 3 is a heat exchanger on the user side that becomes a condenser during heating and an evaporator during cooling, 4 is a heat source side heat that becomes a condenser during cooling and an evaporator during heating. The exchanger, 5, is a throttle mechanism, and these are cold tube pipes 6
are connected in series to form a main heat pump refrigerant circuit 8.

In this configuration, the basic operation of normal rotation of cooling and heating is as follows.

First, during heating operation, the refrigerant gas compressed by the compressor 1 and discharged at a high temperature is sent to the user-side heat exchanger 3 by the refrigerant switching device 2, and at this time, the user-side heat exchanger 3 It becomes a condenser and condenses the refrigerant passing through it, and the a-condensed refrigerant passes through the throttling mechanism 5, where the refrigerant is depressurized and is sent to the heat source side heat exchanger 4. The heat source side heat exchanger 4 serves as an evaporator, and the refrigerant sent there evaporates and is sucked into the compressor 1 via the refrigerant switching device 2, and this movement is repeated.

Next, during the forward rotation of the air conditioner, the refrigerant gas compressed by pressure 1a*1 and discharged at a high temperature is sent to the heat source side heat exchanger 4 by the refrigerant switching device 2, and at this time, this heat source side heat exchanger The container 4 acts as a condenser and condenses the refrigerant passing therethrough, and the refrigerant condensed here passes through the throttling mechanism 5, where the refrigerant is depressurized and is sent to the user-side heat exchanger 3. This user-side heat exchanger 3 serves as an evaporator, and the cold tofu sent there evaporates and removes the heat in the room, and is further sucked into the compression Ia1 through the refrigerant ticket device 2, and this movement is repeated.

9 is a sub heat pump refrigerant circuit in which a residual heat exchanger 10 is disposed between the condenser of the main heat pump refrigerant circuit 8 and the throttle mechanism 5, and the refrigerant that has passed through the condenser of the main heat pump refrigerant circuit 8 is used as a heat source. and this sub heat pump refrigerant circuit 9
is the compressor 11. Said residual heat heat exchanger 10. -A heat exchanger located on the side of the user-side heat exchanger 3? ! 12, a heat exchanger 13 located on the side of the heat source side heat exchanger 4, and a throttle mechanism 14. During heating, the heat exchanger 12 on the user side heat exchanger 3 is used as a condenser, and during cooling, the heat exchanger 13 on the side of the heat source side heat exchanger 4 is used as a condenser.
It consists of switching valves 15 and 16 which serve as condensers.

The heat exchanger 12 located in the user-side heat exchanger 3a is
It may be installed alongside the user-side heat exchanger 3, or it may be configured to directly or indirectly exchange heat with the refrigerant flowing through the user-side heat exchanger 3. The heat exchanger 13 placed on the side may be installed together with the heat source side heat exchanger 4, or the heat source side heat exchanger 4 may be configured to directly or indirectly exchange heat with the waving cold bath. It's okay.

Next, the relationship between the condenser and throttle mechanism 5 of the main heat pump refrigerant circuit 8 and the residual heat exchanger lO of the auxiliary heat pump refrigerant circuit 9 will be described in detail.

As for the condenser, as described above, the user-side heat exchanger 3 serves as a condenser during heating operation, and the heat source-side heat exchanger 4 serves as a condenser during cooling operation. During heating operation, the refrigerant flows from the a-line temperature of the user-side heat exchanger 3 to the throttling mechanism 5,
During cooling operation, the air flows from the condenser made up of the heat source side heat exchanger 4 to the throttle mechanism 5. Therefore, the residual heat exchanger 10 connected between the condenser and the throttle mechanism 5 is placed between the user-side heat exchanger 3 and the throttle mechanism 5 during the heating operation, and is placed between the user side heat exchanger 3 and the throttle mechanism 5 during the cooling operation. It must be placed between the heat source side heat exchanger 4 and the throttle mechanism 5.

Therefore, in the embodiment shown in FIG.
,5. b are connected in series, and the respective aperture mechanisms 5a,
5b has a bypass pipe 18 with check valves 17a and 1'7b.
a, 18b are provided, and the two aperture mechanisms 5a
, 5b, and a residual heat exchanger 10 is disposed between the refrigerant and the heat exchanger 10. During heating operation, the refrigerant flowing from the user-side heat exchanger 3, which serves as a condenser, does not pass through the throttling mechanism 5a. It passes through the bypass pipe 18a, the remaining 8 heat exchangers 10, and the throttling mechanism 5b, where it is depressurized.On the other hand, during cooling operation, it flows from the heat source side heat exchanger 4, which serves as a condenser. The refrigerant passes through the residual heat exchanger 10 through the bypass pipe 18b without passing through the throttling mechanism 55, and then passes through the throttling mechanism 5a where it is depressurized.

The second Ui4 shows an example of another embodiment, and in this embodiment, a manifold check valve 19 is used, and during heating operation and cooling operation, the refrigerant flowing from the user side heat exchanger 3 and the heat source side heat exchanger The cold tofu flowing from 4 also passes through the manifold check valve 19 and the residual heat exchanger 10 before passing through the throttling mechanism 5.

In the figure, 20.21 is a fan, and 22.23 is a check valve.

1 and 2 show refrigerant circuit diagrams in which the user-side heat exchanger 3 is installed inside a house 24, but the user-side heat exchanger 3 is installed outside the house, and the user-side heat exchanger 3 and The indoor heat exchanger may be connected with a circulation pipe that circulates the heat medium, and the heat medium within the circulation pipe may be circulated by a pump.

Therefore, during either cooling or heating operation, the heat exchanger 3 on the user side or the heat exchanger 4 on the heat source side, which serves as a condenser for the main heat pump cold tofu circuit 8, still has a sufficient temperature. Before the refrigerant is depressurized by the throttle mechanism 5, heat is exchanged with the refrigerant of the auxiliary heat pump refrigerant circuit 9 in the residual heat exchanger 10.

Above is the heating and cooling system consisting of the main heat pump refrigerant circuit 8 and the sub heat pump refrigerant circuit 9! The cooling/heating operation of the A position will be explained.

The cooling/heating operation of the main heat pump refrigerant circuit 8 is carried out as described above. Therefore, the operation of the auxiliary heat pump refrigerant circuit 9 during the heating operation of the main heat pump refrigerant circuit 8 is such that the residual heat of the refrigerant that has passed through the user-side heat exchanger 3, which serves as the condenser of the main heat pump refrigerant circuit 8, is set to 4 to 8. The refrigerant generated at 7N in the residual heat exchanger 10 is compressed by compression@ii and discharged at a high temperature. 12 and is condensed, directly or indirectly heating the refrigerant passing through the user-side heat exchanger 3, or heating the inside of the house 24 together with the user-side heat exchanger 3. The refrigerant condensed in the heat exchanger 12 is depressurized through the throttle mechanism 14, and the refrigerant depressurized here is sent to the remaining 88 exchanger 10, where the residual heat of the refrigerant flowing through the main heat pump refrigerant circuit 8 and the heat The heat exchanger 3 is exchanged and evaporated and sent to the compressor 11, and this movement returns to the heat exchanger 3 on the user side of the main heat pump refrigerant circuit 8.
The heating temperature is increased by the refrigerant passing through the heat exchanger 12 of the sub-heat pump refrigerant circuit 9.

Next, the operation of the auxiliary heat pump refrigerant circuit 9 when the main heat pump refrigerant circuit 8 is in cooling operation is controlled by the switching valve 15.16.
The high temperature refrigerant discharged from the compressor 11 is caused to flow into the heat exchanger 13 on the heat source side heat exchanger 4. Here, the high temperature refrigerant radiates heat or is transferred to the heat source side heat exchanger 4. It exchanges heat with the condensed refrigerant flowing through the main heat pump refrigerant circuit 8 and is condensed. Due to the operation of this sub-heat pump refrigerant circuit 9,
The refrigerant with residual heat that has passed through the heat source side heat exchanger 4, which serves as the condenser of the main heat pump refrigerant circuit 8, is condensed in the heat exchanger 13, and the pressure is reduced by the throttle mechanism 14, and the temperature is reduced to the sub heat pump refrigerant circuit 9. The flowing refrigerant exchanges heat with the residual heat exchanger 10, is cooled, is sent to the throttling mechanism 6, and then flows to the user-side heat exchanger 3, so the cooling capacity of the refrigerant flowing through the user-side heat exchanger 3 increases. do.

[Effects of the Invention] As described above, according to the present invention, the pressure 1iiJa, the refrigerant switching device, the user-side heat exchanger which functions as a condenser during heating and an evaporator during cooling, and a heat exchanger that functions as a condenser during cooling and an evaporator during heating. A residual heat heat exchanger is disposed between the condenser and the throttling mechanism in the main heat pump refrigerant circuit, which is composed of a heat source side heat exchanger serving as a heat exchanger, and a throttling mechanism, and the condenser of the main heat pump refrigerant circuit is arranged between the condenser and the throttling mechanism. A heat pump refrigerant circuit that uses the residual heat of the passed refrigerant as a heat source is installed, and in the auxiliary heat pump refrigerant circuit, there are heat exchangers located on the user side heat exchanger side and the heat source side heat exchanger side, respectively. Since we configured a circuit with a switching valve that uses the heat exchanger on the user side heat exchanger as a condenser during heating, and uses the heat exchanger on the heat source side heat exchanger as a condenser during cooling, the heating movement Sometimes, the refrigerant in the auxiliary heat pump refrigerant circuit uses the residual heat of the refrigerant after condensation in the main heat pump refrigerant circuit as a heat source to heat the inside of the house. Y! The capacity increases, and as a result, a sufficient heating effect can be obtained even when the outside temperature is low.

In addition, during cooling operation, the refrigerant with residual heat after condensation in the main heat pump refrigerant circuit is cooled by exchanging heat with the low-temperature refrigerant in the auxiliary heat pump refrigerant circuit, so the refrigerant flowing into the user-side heat exchanger The temperature becomes even lower, the cooling capacity increases, and as a result, a sufficient cooling effect can be obtained even when the outside temperature is high.

[Brief explanation of drawings]

FIG. 1 is a refrigerant circuit diagram of a heating and cooling system showing one embodiment of the invention, and FIG. 2 is a refrigerant circuit diagram showing another embodiment of the invention. 1... Compressor. 2... Refrigerant switching device, 3... User-side heat exchanger 4...
・Heat source side heat exchanger, 5... Throttle mechanism 8... Main heat pump refrigerant circuit 9... Sub-heat pump refrigerant circuit 10... Remaining 88 exchangers, 11... Compressor 12...
Heat exchanger, 13... Heat exchanger 14... Throttle mechanism, 1
5...Switching valve 16...Switching valve

Claims (1)

[Claims] Consists of a compressor, a refrigerant switching device, a user-side heat exchanger that functions as a condenser during heating and an evaporator during cooling, a heat source-side heat exchanger that functions as a condenser during cooling and an evaporator during heating, and a throttle mechanism. In the main heat pump refrigerant circuit,
A residual heat heat exchanger is disposed between the condenser and the throttle mechanism, and a sub-heat pump refrigerant circuit is provided in which the residual heat of the refrigerant that has passed through the condenser of the main heat pump refrigerant circuit is used as a heat source. In this case, the heat exchanger is located on the user side heat exchanger side and the heat source side heat exchanger side, respectively, and the heat exchanger on the user side heat exchanger side is used as a condenser during heating, and the heat exchanger on the side of the user side heat exchanger is used as a condenser during cooling. An air-conditioning and heating system configured with a circuit having a switching valve that uses the heat exchanger on the heat source side as a condenser.