JPS6089627A - Heating device - Google Patents

Abstract

PURPOSE:To provide a heating device which maintains a quantity of heat for heating without a decrease in a flow rate of a thermal medium to a condenser even when the temperature of the open air is low, and is prevented from a decrease in heating capacity. CONSTITUTION:A device is provided with a heating main circulating passage 8 which circulates a heat medium through coupling of a compressor 1, a condenser 2, a pressure reducer 3, and a vaporizer 4 in order named and emits the heat through liquefaction of a thermal medium by means of the condenser 2, a liquid collector 11 which introduces and gathers the thermal medium, liquefied by the condenser 2, through a feed-in flow passage by means of an opened first on-off valve 7, a heater 12 which is coupled to the liquid collector 11 through a second on-off valve 13, generates steam through heating of the thermal medium, and feeds it to the condenser 2 through a feed-out flow passage, and a controller 20 which intermittently controls the inner pressure of the liquid collector 11 to higher than the inner pressure of the heater 12, and feeds the thermal medium from the liquid collector 11 to the heater 12 through closing of a first ON-OFF valve 7 in a feed-in flow passage and opening of a second ON-OFF valve 13 between the liquid collector 11 and the heater 12. This enables prevention of a decrease in a flow rate of the thermal medium to the condenser 2 even when the temperature of the open air is low and permits prevention of a decrease in heating capacity.

Description

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

[Prior art]

An example of a conventional heating device is shown in FIG. In the figure, t
ll is a compressor, (2) is a condenser, (3) is a pressure reducing device, (
4) is an evaporator, which are connected in sequence through piping and filled with a heat medium to form a heating device fif'.

In such a conventional heating system, the heat medium is heated to high temperature and pressure by the compressor +11, and is vaporized and condensed and liquefied in the condenser (2). Next, it is brought to low temperature and low pressure in the pressure reducing device (3), heated in the evaporator 14) and turned into steam again, which is sent to the compressor + 1l.
VC reflux. In this circulation, the condenser (2) radiates the condensation heat during liquefaction to the surroundings, for example to heat the room. On the other hand, the evaporator (4) absorbs the heat of vaporization from the surrounding area in order to evaporate the heat medium, and usually the I-1 condenser (2) is installed indoors and the compressor (l;

The pressure reducing device (3) and the evaporator (4) are installed outdoors.

In the device having the VC configuration as described above, the evaporation temperature of the heat medium decreases as the outside air temperature decreases.

Therefore, the suction pressure of the compressor (1) decreases, and the condenser (2)
) has the disadvantage that the heating capacity is reduced due to insufficient flow of heat medium to the heating medium. As an auxiliary heat source to compensate for this decrease in heating capacity, there has been a heating device that separately incorporates a heater near the condenser (2). However, there were drawbacks such as the fact that the heater was provided near the condenser, which resulted in an increase in the size of the device on the condenser side.

[Summary of the invention]

This invention was made to eliminate all the drawbacks of conventional products such as those mentioned above, such as compressors and condensers.

A heating main circuit in which 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 a condenser and all heat is released.The heat medium liquefied by the condenser? first open
The liquid receiver is introduced from the inlet flow path via the on-off valve and stored, and connected to the liquid receiver via the closed second on-off valve, the heating medium is fully heated to generate its vapor, and the liquid is transferred from the outlet flow path to the condenser. and intermittently make the internal pressure of the liquid receiver substantially higher than the internal pressure of the heater, fully close the first on-off valve of the introduction channel, and the second on-off valve between the liquid receiver and the heater. The VCL is equipped with a control device that allows the heating medium to flow from the liquid receiver into the heater by opening the VCL.Even when the outside temperature is low, the amount of heating heat is maintained without reducing the flow rate of the heating medium to the condenser, and the heating In addition to obtaining a heating system that does not reduce its capacity, the heat medium is evaporated by the heat generated by the heater, and this heat medium is sent to the condenser through a part of the heating main circulation path. This is intended to prevent the overall complexity from increasing in size.

[Embodiments of the invention]

Hereinafter, a simple example of this invention will be explained with reference to FIG.

In the figure, a compressor (1), a condenser (2), a pressure reducing device (
3) and the evaporator (4) constitute a heating main circulation Wrt81.

In (11), the heat medium liquefied by the condenser (2) is passed through the first opening/closing valve, for example, the first check valve (7) whose introduction direction is in the forward direction, and then through the introduction flow path (5). It is a heater that continuously heats a heat medium using a heating element (15) that generates a power source (14) and generates all the steam, and the generated steam is passed through an outlet channel ( 6) through part and all of the main heating circuit 1.8) to the condenser (2).

It is connected to this heater (12I liquid receiver 111) via a second on-off valve, for example, a second check valve Q31f whose forward direction is the flow direction to the heater (121). C2D is a liquid level detector that detects the amount of liquid of the heat medium in the heater (12). It is a makeup valve, and is provided in the flow path (4) that fully connects the gas phase part of the heater (121) and the liquid receiver (II). For example, the flow path isolation is connected to the outlet flow path (6) and the first The stop valve (7) is connected to the liquid receiver (the connection point with the river). In this case, the liquid level detector B, the flow path (
4) and the 'magnetic valve @ constitute a control device, and the heat medium is passed from the liquid receiver (11) to the second check valve 03) to the heater α2.
) is controlled intermittently.

Also, 06) is a liquid heat medium.

A heating device with such a configuration generates heat medium steam from a heater (121 VC), passes through the outlet flow path (6) and a part of the heating main circulation path (8), and supplies the steam to the @ silk device (2). In this case, the flow rate (16) of the heat medium to the heater (12) is refilled by the control device #1. The liquid receiver (
Start from 11). The operation at this time will be described. Regarding the pressure inside the heating device when the solenoid valve (c) is closed, the heat medium in the heater (I21) is continuously heated by the heating element (151If?), and the steam is generated. Due to this, the internal pressure of the gas phase part of the heater 021 and the outlet flow path (6)
The internal pressure at the connection point between the heating main circulation path (8) and the heating main circulation path (5),
) and the heating main circulation path (8), the internal pressure at the connection point with the liquid receiver (1
The internal pressure decreases in the order of 1). Therefore, the heater (1
The specific heat medium vapor generated in 21 is supplied to the condenser (2). On the other hand, a part of the heat medium liquefied in the condenser (2) passes through the introduced flow 114 (51'i) through the open first check valve (7), flows into the liquid receiver (IIIK), and accumulates therein. vessel(
Since the internal pressure of the heater (11) is lower than the internal pressure of the heater (121), there is no liquid flow through the second check valve (+3111'j is closed, so the second check valve 03).

Next, when the flow rate (I6) of the heat medium in the heater (12) becomes insufficient, this is detected by the total liquid level detector c2υ and the droplet valve (A) is opened. and liquid receiver!I1
1 and Kinryu T@(2SKL) are connected.The pressure relationship in the heating system at this time is the internal pressure of the liquid receiver (river) and the heater (12
The internal pressures at the point where the outlet flow path (6) and the heating main circulation path (8) connect, and the internal pressure at the connection point between the introduction flow path (5) and the heating main circulation path (8) increase simultaneously. The internal pressure decreases in this order. Therefore, the first check valve (7) of the introduction channel (61) is closed, and the second check valve 113H between the liquid receiver (II+ and the heater (12)) is closed.
-t, Since the liquid receiver (!l) is installed above the heater (121), it opens due to the gravity of the liquid heat medium in the liquid receiver (11), and the liquid heat in the liquid receiver (Ill) opens. Medium (161i
J Heating @ (121) flows through the second check valve Q31t. Note that at this time also, the vapor of the heat medium generated in the heater (12) is being supplied to the condenser (2).

In this way, the above-mentioned heating main circulation 1M + 81 heat medium flow is determined so that the heat medium vapor can be continuously supplied to the condenser (2), and the heating capacity decreases even when the outside temperature is low. do not. However, since the heater can be attached to the outdoor side, there is no need for long wiring to the enclosure, and wiring costs are significantly reduced compared to when the heater is attached to the indoor side. Furthermore, the indoor side, that is, the condenser side, can be made compact.

In addition, Fig. 3 shows another embodiment of the present invention.
C) is a three-way valve, with the second flow path being the inlet side of the introduction flow path (6), the third flow path being the outlet side of the introduction flow path (6), and the third flow path being connected to the heater ( It is coupled to the gas phase part of I21.

In this embodiment, the inlet side and the outlet side of the introduction channel (5) are usually connected (at this time, the connection of the heater (I21 to the gas phase part is cut off)), and the second check valve t131 is closed and the heat medium is stored in the receiver (11) i' (heater t1
When the liquid volume (16) of 2' becomes insufficient, it is detected by the total liquid level detector c2]) and the three-way valve (c) is rotated to connect the outlet side of the introduction channel (51) and the heater (+21 (At this time, the inlet flow Fj & (5)
(The connection to the inlet side of Check valve α
3) is in the open state, and the heat medium flows into the liquid receiver (from 1 to heater 02) through the second check valve IJ3>k. This embodiment also provides the same effects as the above-mentioned embodiment, and furthermore, since the three-way valve r24 also has the function of the first opening/closing valve, the configuration is simplified.

Further, FIG. 4 shows still another embodiment of the present invention, in which ■ is a power source, g5 is a heating element, and (A) is a switch. Heating section that heats the medium, inside the liquid receiver (II) and the heater α
Kt and IC are used to fully control the pressure difference within 21.

That is, normally the switch @ is fully open to lower the pressure of the heat medium in the liquid receiver (11), the first check valve (7) is in the open state, and the second check valve Q311d is in the closed state to introduce the liquid heat medium. Channel (
5) and collect in the receiver (II). When the amount of liquid in the heater 021 becomes insufficient, the switch @ is fully closed to raise the internal pressure of the liquid receiver (11) to a level higher than the internal pressure of the heater (12I).
As a result, the first check valve (7) is closed, the second check valve 03) is fully opened, and the liquid heat medium passes through the liquid receiver (Ill to the second check valve 03) to the heater ( 121. In this embodiment, the same effect as in the above embodiment is achieved, and in addition, since the positional relationship between the liquid receiver (11) and the heater (121) is not limited, the effect can be widely used. be.

FIG. 5 shows yet another embodiment of the invention.

In the figure, @ is a round float valve with a liquid level detection function.
The float valve @ and the liquid phase part and the gas phase part of the heater (I2) are connected respectively, and the flow path connecting the gas phase part of the float valve @ and the receiving liquid j%41+11' is configured to be openable and closable. has been done. In this example, the liquid receiver [+11H heater (121) is placed above the heater.When the amount of heat medium in the heater 021 is sufficient, KVi, the float valve (c) rises to the closed state. The heater (121 internally pressurized liquid receiver)
When the internal pressure becomes higher than the internal pressure of Ill, the first check valve (7) is opened and the second check valve (13) is closed, and the heat medium is stored in the liquid receiver (11)vc. When the amount of heat medium in the heater (121) becomes insufficient, the float valve @ also falls and becomes open, and the internal pressure of the liquid receiver (11) becomes substantially equal to the internal pressure of the heater Q2+. Due to the gravity of the liquid heat medium in the liquid container (11), the first check valve (7) is fully open and the second check valve (1
3) It becomes open state. Therefore, the heat medium flows from the liquid receiver (1) to the heater (12) through the second check valve (13).In this embodiment, as in the above embodiment, the heat medium flows to the condenser (2). The entire flow rate of the heat medium can be maintained properly.

In addition, the inlet flow @ +51 H is not necessarily the heating main circulation path (
It is not necessary to connect to the high pressure side of 8), for example, it may be connected to the inlet of the evaporator (4) as shown in Fig. 6, and the same effect can be achieved by connecting the part Kl where a liquid heat medium is obtained. .

The heating element of the heater 021 (151fl) does not necessarily have to be an electric heater immersed in a heat medium; it may be heated from the outside, or it may be any heat source that can heat, such as oil or gas. .Furthermore, the liquid level detector t2υ that detects the entire liquid amount of the heat medium in the heater (121) is not necessarily necessary, and the heat medium is intermittently transferred from the liquid receiver 91 to the heater (12) at regular intervals. Furthermore, although the first and second on-off valves are opened and closed by the pressure difference VC, they may be opened and closed electrically in conjunction with the solenoid valve (4).

〔Effect of the invention〕

As described above, the present invention provides a compressor.

The condenser, pressure reduction device, and evaporator are combined in this order to circulate the heat medium, and the condenser liquefies the heat medium vapor and releases heat. A liquid receiver is introduced from the introduction flow path through the first on-off valve and is stored therein, and the liquid is connected to the liquid receiver through the second on-off valve. The internal pressure of the liquid receiver is intermittently made substantially higher than the internal pressure of the heater, the first on-off valve of the introduction channel is closed, and the first on-off valve between the liquid receiver and the heater is closed. 2 A control device that opens the on-off valve and causes the heat medium to flow from the liquid receiver into the heater. This has the advantage that even when the outside temperature is low, the flow of heat medium to the condenser does not decrease and the heating capacity does not decrease. Furthermore, the heat medium generated by the heater is used to evaporate the heat medium, and this heat medium is sent to the condenser through a part of the heating main circulation path, so that the condenser side does not become complicated and large. be able to.

[Brief explanation of the drawing]

Fig. 1 is a neo circuit diagram of a conventional heating device, Fig. 2 is a circuit diagram of a heating device a according to an embodiment of the present invention, and Figs.
FIG. 6 is a circuit diagram showing still other embodiments of the present invention. +11... Compressor, (2)... Condenser, (3)...
・Pressure reduction device, (4)...evaporator, (5)...introduction channel, (6)...outlet channel, (7)...first on-off valve,
(8)...Heating main circulation path, (II)...Liquid receiver, (
+21... Heater, (13)... Second on-off valve, (E)... Control device. In the drawings, the same reference numerals indicate the same parts. Agent Masuo Oiwa Figure 1 Figure 2 8 Figure 3 Figure 4? Figure 5

Claims (1)

[Claims] ill A heating main circulation system in which 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 all of the heat. A liquid receiver that introduces and stores the heat medium liquefied by the condenser from the introduction channel through the first on-off valve that opens the condenser, and a liquid receiver that is connected to the liquid receiver through the closed second on-off valve to transfer heat. a heater that heats the medium to generate its vapor and sends it from the outlet flow path to the self-condenser, and intermittently makes the internal pressure of the liquid receiver substantially higher than the internal pressure of the heater, and A control device that closes a first on-off valve between the liquid receiver and the heater, and opens a second on-off valve between the liquid receiver and the heater to cause the heat medium to flow from the liquid receiver into the heater. . (2) The first on-off valve includes a first check valve that allows the flow of the heat medium from the condenser to the liquid receiver in the forward direction, and the second on-off valve includes a first check valve that allows the flow of the heat medium from the liquid receiver to the heater in the forward direction. 2. The heating device according to claim 1, further comprising a second check valve that directs the flow in the forward direction. (3) A patent claim characterized in that the heater is disposed below all of the liquid receivers, and the control device has a flow path that connects the gas phase part of the heater and the liquid receiver via a solenoid valve. The range of item 1 is the heating device described in item 2.