JPH0226149B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating device, and particularly to improving the performance of a vapor compression type heating device.

FIG. 1 shows an example of a heating device in the prior art. In the figure, 1 is a compressor, 2 is a condenser, 3 is a pressure reduction device, and 4 is an evaporator. These are connected in sequence through piping and a heating medium, such as a refrigerant, is sealed to form a heating device. There is. Furthermore, a heating device 15 is connected to the condenser 2, 5 is a heater, 6 is a heating element, 7 is a power source connected to the heating element 6, and 8 is used to activate or deactivate the heating element 6. This is a switch for intermittently heating the heater 5. Further, the heater 5 is connected to a condenser by an outlet pipe 9 and an inlet pipe 10. 11
is arranged in the outlet side piping 9, and the outlet side check valve is arranged in the inlet side piping 10, and the outlet side check valve is arranged in the inlet side piping 10, and the outlet side check valve is arranged in the inlet side piping 10, and the refrigerant is led out from the heater 5 to the condenser 2 in the forward direction.
This is an introduction-side check valve whose forward direction is the direction in which refrigerant is introduced from the refrigerant to the heater 5. Further, 13 indicates a gas phase portion within the heater 5, and 14 indicates a refrigerant liquid.

In the heating device having such a configuration, the refrigerant gas that has become high temperature and high pressure in the compressor 1 is condensed and liquefied in the condenser 2. Next, it becomes low temperature and low pressure in the pressure reducing device 3, is heated in the evaporator, is gasified again, and is refluxed to the compressor 1. In this circulation, when it liquefies in the condenser 2, it generates heat in the surroundings, for example to heat the room.
Furthermore, the refrigerant in the heating device 15 is circulated to the condenser 2 as an auxiliary heat source. When the switch 8 is closed, the refrigerant gas gathers in the gas phase portion 13 of the heater 5, increasing the vapor density. Therefore, the pressure in the heater 5 becomes higher than the pressure in the condenser 2, and since the inlet side check valve 12 is disposed in the inlet side pipe 10, the refrigerant gas flows from the gas phase section 13 to the outlet side pipe. 9. Flows into the condenser 2 through the outlet check valve 11. When the switch 8 is opened after a predetermined period of time, the inside of the heater 5 gradually cools down, and when the temperature becomes lower than the temperature inside the condenser 2, the pressure also becomes lower than that inside the condenser. Therefore,
Since the outlet side check valve 11 is disposed in the outlet side piping 9, the refrigerant liquid in the condenser 2 flows through the inlet side check valve 1.
2 to the heater 5.

Since the heating device of the prior art is configured as described above, even if the switch 8 is opened after the refrigerant in the heater 5 flows into the condenser 2, the temperature in the heater 5 will be lower than that in the condenser 2. Since the refrigerant does not flow back to the heater 5 until the temperature becomes lower than the temperature inside the heater 5, and it takes time for the temperature of the heater 5 to cool down, the heating device 15 has the disadvantage that it does not operate smoothly as an auxiliary heat source.

This invention was made in order to eliminate the drawbacks of the prior art as described above. The first auxiliary circuit connects to the upstream piping of the condenser, and the condenser's downstream piping passes through the second inlet check valve, the second heating device, and the second outlet check valve to the upstream piping of the condenser. a second auxiliary circuit connected to the heating device, and a switch that turns the other heating device into a non-heating state when heating one heating device, and directs the vapor of the heat medium generated by the one heating device to the condenser. To provide a heating device in which the liquefied heat medium is introduced into the other heating device, so that the heat medium is sent to the condenser relatively continuously and the heating capacity does not decrease even when the outside temperature is low. The purpose is to

An embodiment of this invention is shown in FIG. In the figure, reference numeral 16 denotes a second heating device, which is connected to the condenser 2 in the same way as the first heating device, and includes a second heating device 17, a second heating element 18, a second outlet check valve 19, and a second inlet side check valve 19. It is composed of a stop valve 20.

In the above device, when the first heating element 6 and the power source 7 are connected by the switch 8, the vapor density of the gas phase portion 13 of the first heater 5 increases due to refrigerant vapor, and the refrigerant vapor is led out from the first heater 5. It flows into the condenser 2 through the side pipe 9. Furthermore, the refrigerant liquid condensed in the condenser 2 is heated to a second heater 17 than the pressure of the condenser 2.
Since the pressure inside is lower, the condensate flows from the condenser 2 through the inlet pipe 10 to the second heater 17 . Therefore, the refrigerant becomes vapor in the first heating device 15,
It is condensed through the condenser 2 and stored in the second heating device 16 . Next, when the number of refrigerant plates in the first heating device 15 becomes low, the switch 8 is turned off to the second heating element 18.
When the switch is switched to connect the power supply 7 and the
The temperature inside the heater 17 rises, and the second heater 17,
The pressure decreases in the order of condenser 2 and first heater 5,
The refrigerant becomes refrigerant vapor in the second heater 17, condenses in the condenser 2, becomes refrigerant liquid, and returns to the first heater 5. Therefore, the refrigerant flows in the order of the second heating device 16, the condenser 2, and the first heating device 15, contrary to the state before the switch 8 is switched. By alternately operating and inactivating the heating of the first heating device 15 and the second heating device 16 in this way, an auxiliary heat source that efficiently circulates the refrigerant with little time loss can be obtained.

In addition, as another embodiment, as shown in FIG. 8, by providing the condenser 2 with a liquid receiving part 21 and a condenser 22, the refrigerant vapor flowing into the condenser 2 is condensed and becomes a refrigerant liquid in the condensing part 22. This can prevent it from accumulating inside. By doing this, in addition to the effects described in the above embodiment, there is an effect that the condensation area of the condenser 2 is prevented from decreasing and refrigerant vapor is efficiently condensed.

Still another embodiment is shown in FIG. In the figure, reference numerals 23 and 24 are first and second pressure reducing devices for reducing the pressure of the refrigerant vapor led out from the first and second heaters 5 and 17 and sending it to the compressor 1. in this way,
When connected to a place with lower pressure using the first and second pressure reducing devices 23 and 24, it becomes easier to lower the temperature from high temperature to low temperature after switching the switch 8 from closed to open, making it even more efficient than the above embodiment. Refrigerant can be circulated well.

Furthermore, as shown in FIG. 5, a more practical heating device can be provided by providing a solenoid valve 30 in the introduction pipe 10 so that the auxiliary heat source can be disconnected when it is unnecessary.

Further, the introduction side pipe 10 does not necessarily have to be on the high pressure side, and may be connected to the inlet side of the evaporator 4 as shown in FIG. It has the same effect as the example.

Further, in the above embodiment, the alternate heating of the two heaters is switched using one power source and a switch, but the present invention is not limited to this.

Further, the heating element does not necessarily have to be an electric heater immersed in the refrigerant liquid, but may be heated from the outside, or may be any heat source capable of intermittent heating, such as oil or gas.

As described above, according to the present invention, a compressor, a condenser, a pressure reducing device, and an evaporator are connected in this order to circulate a heat medium, and the vapor of the heat medium is liquefied in the condenser to generate heat. In those that emit
From the downstream piping of the condenser to the first inlet side check valve, the first
A heating device, a first auxiliary circuit connected to the upstream piping of the condenser via the first outlet check valve, a second inlet check valve from the downstream piping of the condenser, a second heating device, a second
A second auxiliary circuit connected to the upstream piping of the condenser through the outlet check valve, and a switch that sets the other heating device to a non-heating state when one heating device is heated, and the one heating device By conducting the vapor of the heat medium generated in the above to the condenser and introducing the liquefied heat medium into the other heating device, the amount of heat medium can be prevented from decreasing even when the outside temperature is low. , it is possible to provide a heating device in which a heat medium can be circulated relatively continuously.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing a prior art heating device, Fig. 2 is a circuit diagram showing one embodiment of the present invention, and Figs. 3 to 6 are circuit diagrams showing other embodiments of the invention. be. 1... Compressor, 2... Condenser, 3... Pressure reducing device, 4... Evaporator, 11... First outlet side check valve,
12...First introduction side check valve, 15...First heating device, 16...Second heating device, 19...Second outlet side check valve, 20...Second introduction side check valve, 21 ...liquid receiving part, 22...condensing part. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A compressor, a condenser, a pressure reducing device, and an evaporator are connected in this order to circulate a heat medium, and the vapor of the heat medium is liquefied in the condenser to release heat. , a first auxiliary circuit connected from the downstream piping of the condenser to the upstream piping of the condenser via the first inlet-side check valve, the first heating device, and the first outlet-side check valve; A second auxiliary circuit connected from the downstream piping to the upstream piping of the condenser via the second inlet check valve, the second heating device, and the second outlet check valve, and when heating one of the heating devices, A switch is provided to set the other heating device in a non-heating state, and the vapor of the heat medium generated by heating in the one heating device is led to the condenser, and the liquefied heat medium is transferred to the other heating device in the non-heating state. A heating device configured to be introduced into a heating device. 2. The heating device according to claim 1, wherein the condenser includes a condensing section that liquefies the vapor of the heat medium, and a liquid receiving section that stores the liquid.