JPH07305910A - Heat pump apparatus - Google Patents

Abstract

PURPOSE:To promote temperature rise of an indoor side heat exchanger after heating operation is reopened by providing heaters on a compressor and on an outdoor heat exchanger, and further providing a controller for supplying power to the heaters when the compressor is interrupted during operation in a heating mode. CONSTITUTION:In the case where a compressor 1 is interrupted for a long time, a power supply for an air conditioner is inputted and heating is selected whereby an outdoor side heat exchanger 3 and the compressor 1 are heated with heating apparatuses 9 and 10, respectively. Hereby, a refrigerant in an indoor side heat exchanger 5 is increased. Once in this state heating operation is started, rise of high pressure is promoted to hereby permit hot air to be blown off in a short time upon building-up. More specifically, the refrigerant does not stay in the outdoor side heat exchanger 3, temperature of which is lowered in the timing the heating operation is performed after interruption of the compressor 1 while the refrigerant stays in the indoor heat exchanger 5 which is a high pressure side upon the operation of the compressor 1. For this, high pressure is more increased upon starting of the operation of the compressor 1 and hence hot air is rapidly blown off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump device used in an air conditioner.

[0002]

2. Description of the Related Art FIG. 4 is a system diagram of a conventional heat pump device. In the figure, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is a throttle mechanism, 5 is an indoor heat exchanger, 7
Is a tube of the outdoor heat exchanger 3, 8 is an indoor heat exchanger 5
It is a tube of.

In this system, the indoor heat exchanger 5 serves as a condenser and the outdoor heat exchanger 3 serves as an evaporator during heating operation. The flow of the refrigerant during the heating operation is compressed by the compressor 1, condensed through the four-way valve 2 in the indoor heat exchanger 5, expanded by the expansion mechanism 4, expanded by the outdoor heat exchanger 3, and evaporated in the four-way valve. After 2 the compressor 1 is entered and this is repeated.

[0004]

When the compressor 1 is stopped in such a refrigeration cycle, the refrigerant in the system is dispersed. When the operation of the compressor 1 is stopped for a long time at the time of heating, the temperature of the outdoor heat exchanger 3 acting as an evaporator decreases, and the refrigerant accumulates therein.
Even if the compressor 1 is started in this state, the temperature of the indoor heat exchanger 5 acting as a condenser does not rise easily,
For those who are indoors, it keeps cold.

The present invention solves the above-mentioned drawbacks of the prior art and prevents a large amount of refrigerant from staying in the outdoor heat exchanger (evaporator) even when the compressor is stopped during the heating operation. Therefore, the temperature rise of the indoor heat exchanger after the heating operation is restarted is tried to be accelerated.

[0006]

The present invention has been achieved to solve the above-mentioned problems and is characterized by the following in a heat pump device comprising a compressor, an outdoor heat exchanger, a throttle, and an indoor heat exchanger. The present invention relates to a heat pump device. (1) A heater is attached to the compressor and the outdoor heat exchanger, and a controller that energizes the heater when the compressor stops during operation in a heating mode is provided. (2) In the heat pump device according to claim 1, the controller is configured to energize the heater only when the power is on, the operation mode is the heating mode, and the compressor is stopped.

[0007]

When the compressor is stopped during the heating mode operation, the heaters of the compressor and the outdoor heat exchanger are energized, and the refrigerant is vaporized, so that the refrigerant is prevented from staying there. When not operating for a long time, if the power source is turned on and the operation mode is set to the heating mode, the retention of the refrigerant in the compressor and the outdoor heat exchanger can be prevented as described above.

[0008]

1 is a system diagram of a heat pump device according to an embodiment of the present invention. In the figure, 9 is the outdoor heat exchanger 3
A heating device provided in the vicinity of the tube 7 of the above, 10 is a heating device provided in the peripheral portion of the compressor 1, and 6 is a control device for controlling both the above heating devices. The parts other than the above are the same as those in the conventional technique (FIG. 4).

In this apparatus, during the heating operation, the indoor heat exchanger 5 serves as a condenser and the outdoor heat exchanger 3 serves as an evaporator, as in the conventional example. The flow of the refrigerant during the heating operation is compressed by the compressor 1, condensed through the four-way valve 2 in the indoor heat exchanger 5, expanded by the expansion mechanism 4 and evaporated in the outdoor heat exchanger 3, and then four-way. It enters the compressor 1 through the valve 2 and repeats this.

FIG. 2 shows the mounting position of the heating device 9 in the outdoor heat exchanger 3 in the above embodiment. In the figure, 7 is a tube of the outdoor heat exchanger 3, 21 is a fin, and 9 is a heating device. The figure (a) is the side of the heat exchanger 3, the figure (b) is the lower part of the heat exchanger 3, and the figure (c) is the one in which the two tubes under the two-row coil are replaced by the heating device 9. Is.

FIG. 3 is a flow chart of control in the above embodiment. In the figure, 31 is the start of the flow,
32 is ON / OFF judgment of the main power supply of the air conditioner, 33 is judgment of heating operation, 34 is judgment of compressor stop, 35 is ON operation of compressor heating device, 36 is outdoor heat exchange A heater for a heater is turned on, and a heater for a compressor and an heater for an outdoor heat exchanger are turned off.

In this control flow, it is determined whether or not the main power source of the air conditioner is turned on at 32, the heating operation is determined at 33, and the compressor is turned off at 34. When satisfied, the compressor heating device and the outdoor heat exchanger heating device are turned on at 35 and 36. The original power source is O
In the case of FF, when not in heating operation, when the compressor is ON, the heating devices of the compressor and the outdoor heat exchanger are OFF at 37.
It is supposed to be done.

In the system of this embodiment, when the compressor 1 is stopped for a long time, if the main power source of the air conditioner is turned on and heating is selected, as shown in the flow chart of FIG. 3 is heated by the heating device 9, and the compressor 1 is heated by the heating device 10. As a result, the indoor heat exchanger 5
The amount of refrigerant in the inside increases. When the heating operation is started in this state, the high-pressure pressure rises quickly, and hot air is blown out in a short time when rising.

The following effects can be obtained in this embodiment. That is, at the time when the heating operation is performed after the compressor 1 is stopped (especially in winter), the refrigerant does not stay in the outdoor heat exchanger 3 where the temperature becomes low, and when the compressor 1 is operating, the high-pressure side chamber Since a large amount of refrigerant accumulates in the inner heat exchanger 5, a high pressure rise at the start of operation of the compressor 1 is high, and hot air is blown out quickly.

Further, if the heating device 9 is not provided, a large amount of the refrigerant is accumulated in a portion having a low temperature when the compressor 1 is stopped, and a rapid liquid back is caused in the compressor 1 at the same time as starting. However, in this embodiment, such a sudden liquid back phenomenon can be avoided.

[0016]

In the heat pump device of the present invention,
A heater is attached to the compressor and the outdoor heat exchanger, and a controller that energizes the heater when the compressor stops during the operation in the heating mode is provided, or the controller is turned on in the operation mode. Is configured to energize the heater only when the compressor is in the heating mode and the compressor is stopped.Therefore, even when the compressor is stopped during the heating operation, a large amount of refrigerant is stored in the outdoor heat exchanger. It is possible to prevent the temperature from increasing and to speed up the temperature rise of the indoor heat exchanger after the heating operation is restarted.

[Brief description of drawings]

FIG. 1 is a system diagram of a heat pump device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a heating device mounting position in the outdoor heat exchanger in the above embodiment.

FIG. 3 is a flowchart of control in the above embodiment.

FIG. 4 is a system diagram of a conventional heat pump device.

[Explanation of symbols]

 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Throttle mechanism 5 Indoor heat exchanger 6 Control device 7 Tube 8 Tube 9 Heating device 10 Heating device 21 Fin

Claims (2)

[Claims] 1. A heat pump device comprising a compressor, an outdoor heat exchanger, a throttle, and an indoor heat exchanger, wherein a heater is attached to the compressor and the outdoor heat exchanger, and the compressor is operated during operation in a heating mode. A heat pump device comprising a controller for energizing the heater when the machine is stopped. 2. The heat pump device according to claim 1, wherein the controller is configured to energize the heater only when the power is on, the operation mode is the heating mode, and the compressor is stopped. .